CN210054297U

CN210054297U - Crayfish breeding big-arch shelter

Info

Publication number: CN210054297U
Application number: CN201920615145.0U
Authority: CN
Inventors: 包明君; 仲伟光; 许焰林
Original assignee: Shenyang Chuangpuhua Agricultural Investment Co Ltd
Current assignee: Shenyang Chuangpuhua Agricultural Investment Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-02-14
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a crayfish greenhouse breeding greenhouse, wherein a plurality of ponds are arranged in the greenhouse, breeding shrimps are placed in a shrimp breeding pond, and hatched shrimp seeds are placed in a shrimp seed pond; the greenhouse curtain cloth above the light-transmitting greenhouse roof of the greenhouse is mutually independent, and each greenhouse curtain cloth is correspondingly provided with a curtain rolling machine; at least one greenhouse curtain cloth is used for shielding the sunlight irradiating the shrimp culture pond. Adopt above-mentioned technical scheme, the utility model discloses a crayfish breeding big-arch shelter from throwing into the hatching of shrimp, arrives the shrimp seedling again and cultivates, through the mode regulation temperature in the big-arch shelter of rolling up, putting down and control ventilation of control big-arch shelter curtain cloth, based on crayfish's the biological habit of having a rest on daytime, the activity at night, the sunshine and the illumination time of close control shrimp seedling and shrimp culture reduce the growth rate of shrimp seedling.

Description

Crayfish breeding big-arch shelter

Technical Field

The utility model relates to a crayfish breeding big-arch shelter belongs to crayfish cultivation technical field.

Background

Crayfish (acambrus clarkii), also known as Procambarus clarkii, crayfish red crayfish and freshwater crayfish. The meat is popular with people because of delicious taste. Due to the omnivorous property, the fast growth speed and the strong adaptability, the method forms an absolute competitive advantage in the local ecological environment. The food intake range of the feed comprises aquatic weeds, algae, aquatic insects, animal carcasses and the like, and the feed can kill the aquatic weeds, the algae, the aquatic insects, the animal carcasses and the like in case of shortage of food. In the last two years, the crayfish market is fierce and the supply is not adequate, but the crayfish is mainly cultured in south areas such as Jiangsu and Hubei, and the yield is very low in the northeast. Because the temperature is low in northeast winter, the crayfishes and the shrimp seeds can not live through the winter naturally, which greatly limits the crayfishes from being cultured in the northeast area. In view of this, we have adopted a greenhouse breeding method. In northeast areas, the mating of crayfishes is concentrated in 5-10 months and 7-9 months; fertilized eggs are discharged in 8-11 months and attached to the feet of the crayfish, commonly called spawning, the water temperature cannot be too low in the period, otherwise the crayfish eggs are easy to grow mildewed; the shrimp seedlings are continuously hatched in 10 months to 2 months in the next year, and mainly focus on 11-1 months. The time for putting the crayfish in the rice field in the northeast region in batches is 6 months, the crayfish fries need to grow for 5-7 months after being hatched, the time is too long, if the growth speed is not controlled, the crayfish fries can reach the pond outlet specification before 6 months, the crayfish fries can exceed the bearing density of an incubation pond after continuously growing, the activity space is reduced, the conditions of self-killing, disease infection and the like are easy to occur, and meanwhile, the cost investment is greatly increased.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the utility model is to provide a crayfish breeding big-arch shelter, the growth rate of crayfish can be controlled through the temperature in sunshine, the long and big-arch shelter of control shrimp seedling.

In order to achieve the purpose, the crayfish breeding greenhouse comprises a shrimp breeding pond, a shrimp fry pond and a reservoir which are arranged inside the greenhouse, and further comprises a sun shading device and a lighting device;

the sun-shading device comprises greenhouse curtain cloth arranged above a light-transmitting roof of the greenhouse and a sun-shading roller shutter machine; the greenhouse curtain cloth is independent from one another, and the transparent roof can be covered after the greenhouse curtain cloth is spliced; the number of the sun-shading roller blind machines is multiple, each greenhouse curtain corresponds to one sun-shading roller blind machine, and the sun-shading roller blind machines are used for rolling up or paving the greenhouse curtain; at least one greenhouse curtain cloth is used for shielding sunlight irradiating the shrimp fry pond;

the lighting device comprises a liftable lampshade arranged above the shrimp larvae pond, a fluorescent lamp is arranged in the lampshade, and the lampshade can directionally project emergent light of the illuminating lamp to the shrimp larvae pond;

the water in the water storage tank can be pumped by a water pump and injected into the shrimp breeding pond and the shrimp larva pond; a drainage device is arranged in the shrimp breeding pond and the shrimp fry pond, the drainage device comprises an underground drainage pipe, an overground base pipe communicated with the underground drainage pipe and a superposed pipe group, and the superposed pipe group comprises at least one sleeve; the superposed pipe group is detachably screwed at the upper end of the upper ground pipe, and a sealing ring is arranged at the connecting part of the superposed pipe group and the upper ground pipe.

The lampshade is arranged on the lifting device; the lifting device comprises two balancers, namely a first balancer and a second balancer; the fixed pulley comprises four fixed pulleys positioned on the inner beam of the greenhouse, namely a first fixed pulley, a second fixed pulley, a third fixed pulley and a fourth fixed pulley; the lamp shade comprises four fixed pulleys positioned at the upper part of the lamp shade, namely a fifth fixed pulley, a sixth fixed pulley, a seventh fixed pulley and an eighth fixed pulley; the first balancer and the second balancer are respectively arranged at two ends of the lampshade; ropes are respectively led out from two ends of the balancer, and the first end rope of the first balancer is sequentially wound around the fifth fixed pulley, the first fixed pulley, the second fixed pulley and the sixth fixed pulley and then is connected with the first end rope of the second balancer into a whole; and the second end rope of the first balancer is sequentially wound around the seventh fixed pulley, the third fixed pulley, the fourth fixed pulley and the eighth fixed pulley and then is connected with the second end rope of the second balancer into a whole.

At least an enclosing wall is arranged on the outer side of the shrimp larva pond; the light shade is movable downwardly to a position where its lower edge is below the top edge of the enclosure.

At least an enclosing wall is arranged on the outer side of the shrimp larva pond; the enclosure is provided with two parallel support rods, and two sides of the shading curtain cloth are respectively installed on the support rods through a plurality of hanging rings.

The drainage device further comprises an outer pipe, the upper ground pipe is arranged on the inner side of the outer pipe, and a plurality of water permeable holes are formed in the bottom of the outer pipe.

The drainage device further comprises an outer wall body, the outer pipe is arranged on the inner side of the outer wall body, the outer wall body is provided with a water passing port, and a filter screen is arranged at the water passing port.

The crayfish breeding greenhouse further comprises a ventilation device; the ventilation device comprises a ventilation rolling shutter machine, and the ventilation rolling shutter machine is used for rolling up the greenhouse film at the bottom of the sunshine side of the greenhouse to form a ventilation opening; the air guide plate is arranged in the greenhouse and close to the ventilation opening; one side of the guide plate close to the ventilation opening is arranged on the shaft seat through a rotating shaft; the ventilation device further comprises a driving device for driving the guide plate to tilt upwards.

Ventilation roll up curtain machine include the installing support, install in ventilation gear motor and ventilation serving on the installing support and connect in the epaxial first receipts of ventilation serving are put the rope, ventilation serving is connected in ventilation gear motor power take off end, the one end of putting the rope in first receipts is fixed in on the installing support, downwardly extending behind the hole that the other end passed on the big-arch shelter membrane, and the bypass the lower extreme after-fixing of big-arch shelter membrane is in on the ventilation serving.

Drive arrangement includes that the second receive and releases the rope and the curtain machine is rolled up in the ventilation, the one end that the rope was received and released to the second is fixed in ventilation serving axle, the other end pass the epimembranal hole after-fixing in of big shed keep away from of guide plate one side of pivot, thereby work as when ventilation serving axle rotates and rolls up the big shed membrane the second receive and releases the rope and can stimulate the upwards perk of guide plate.

Adopt above-mentioned technical scheme, the utility model discloses a crayfish breeding method can be implemented through the utility model discloses a crayfish breeding big-arch shelter, from throwing into the breeding shrimp to the hatching of shrimp larvae, and then to the breeding of shrimp larvae, through the mode regulation temperature in the big-arch shelter of control greenhouse curtain cloth rolling up, putting down and control ventilation, because the living habits of day rest, the activity at night of crayfish, the sunshine and the illumination time of strict control shrimp larvae and breeding shrimp, reduce the growth rate of shrimp larvae, carry out the subregion breeding simultaneously, separate shrimp larvae and breeding shrimp, can be convenient for the subregion illumination, do not impression the mobility of breeding shrimp when reducing shrimp larvae growth rate; in addition, the dissolved oxygen regulation and control are carried out to the water in the pond, on the one hand, oxygen is blown out at night, on the other hand, the quantitative water is extracted from the reservoir and is injected into the pond, the water pumped out at night in the reservoir can be complemented in the daytime, and simultaneously the water temperature in the reservoir can be basically consistent with the pond water temperature, so the water in the reservoir can not cause the pond water temperature to change suddenly after being injected into the pond, and the problem that the temperature of the water in the pond is rapidly reduced because cold water is directly injected into the pond from the outside is avoided.

Drawings

Fig. 1 is the structure schematic diagram of the crayfish breeding greenhouse of the utility model.

Fig. 2 is a schematic perspective view of fig. 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

Fig. 4 is a schematic view of the installation of the shade fabric.

Fig. 5 is a partially enlarged view of portion B of fig. 4.

Fig. 6 is an installation schematic diagram of the lighting device installed inside the greenhouse.

Fig. 7 is a schematic structural diagram of the lighting device.

Fig. 8 is a partially enlarged view of the portion C of fig. 7.

Fig. 9 is a schematic structural view of the drainage device.

Fig. 10 is a cross-sectional view of fig. 9.

Fig. 11 is an enlarged view of a portion D in fig. 10.

Fig. 12 is an exploded view of the stacked tube stack.

Fig. 13 is a schematic view of the structure of the ventilation device.

Fig. 14 is a schematic view of the air curtain rolling machine after rolling.

Fig. 15 is a schematic view of a baffle in a down state.

Fig. 16 is a schematic view of a tilted state of a baffle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in the figure, the utility model provides a crayfish breeding big-arch shelter, including setting up in big-arch shelter inside kind of shrimp pond 1, shrimp fry pond 2 and cistern 3, still include solar protection devices and lighting device. The sun-shading device comprises a greenhouse curtain cloth 5 and a sun-shading roller shutter 6, wherein the greenhouse curtain cloth 5 is arranged above a light-transmitting greenhouse top 4 of the greenhouse; the light-transmitting shed roof 4 can be a greenhouse film, and also can be hard glass or a hard plastic plate. The greenhouse curtain cloth 5 is mutually independent, and the transparent roof 4 can be covered after the greenhouse curtain cloth 5 is spliced; the number of the sun-shading curtain rolling machines 6 is multiple, each greenhouse curtain cloth 5 corresponds to one sun-shading curtain rolling machine 6, and the sun-shading curtain rolling machines 6 are used for rolling up or paving the greenhouse curtain cloth 5; at least one greenhouse curtain cloth 5 is used for shielding the sunlight irradiating the shrimp larvae pond 2. The sunshade roller blind machine 6 is including setting up in the mount pad 61 of printing opacity shed roof top, install in sunshade gear motor 62 on the mount pad 61, connect in sunshade gear motor 62 power take off end's sunshade rolling rope axle 63 and connect in sunshade rope 64 is received and is released on the sunshade rolling rope axle 63, the stiff end of big-arch shelter curtain cloth 5 is fixed in on the mount pad 61, the one end that the rope 64 was received and released to the sunshade is fixed in on the mount pad 61 and be located big-arch shelter curtain cloth 5's stiff end below, sunshade rope 64 is received and is released the other end is fixed in behind the big-arch shelter curtain cloth 5 on the sunshade rolling rope axle 63.

As shown in fig. 6-8, the lighting device comprises a lampshade 7 capable of lifting and descending and arranged above the shrimp larvae pond 2, a fluorescent lamp (not shown in the figure) is arranged in the lampshade 7, and emergent light of the fluorescent lamp can be directionally projected to the shrimp larvae pond 2 under the action of the lampshade 7. The lampshade 7 is arranged on the lifting device; the lifting device includes two balancers, i.e., a first balancer 710 and a second balancer 720; the greenhouse comprises four fixed pulleys, namely a first fixed pulley 71, a second fixed pulley 72, a third fixed pulley 73 and a fourth fixed pulley 74, which are positioned on a beam 73 in the greenhouse; and four fixed pulleys, namely a fifth fixed pulley 75, a sixth fixed pulley 76, a seventh fixed pulley 77 and an eighth fixed pulley 78, positioned at the upper part of the lamp shade 7; the first balancer 710 and the second balancer 720 are respectively disposed at two ends of the lamp housing 7; ropes 700 are led out from two ends of the balancer respectively, and the first end rope of the first balancer 710 sequentially rounds the fifth fixed pulley 75, the first fixed pulley 71, the second fixed pulley 72 and the sixth fixed pulley 76 and is connected with the first end rope of the second balancer 720 into a whole; the second end rope of the first balancer 710 is sequentially wound around the seventh fixed pulley 77, the third fixed pulley 73, the fourth fixed pulley 74, and the eighth fixed pulley 78, and then integrally connected to the second end rope of the second balancer 720.

The water in the reservoir 3 can be pumped by a water pump (not shown in the figure) and injected into the shrimp breeding pond 1 and the shrimp larva pond 2; drainage devices are arranged in the shrimp breeding pond 1 and the shrimp fry pond 2, each drainage device comprises an underground drainage pipe 81, an upper ground pipe 82 communicated with the underground drainage pipe 81 and a superposed pipe group, and each superposed pipe group comprises at least one sleeve 83; the stacked tube set is detachably screwed to the upper end of the upper ground pipe 82, and a sealing ring 84 is provided at the connection point of the stacked tube set and the upper ground pipe 82. At least an enclosing wall 21 is arranged outside the shrimp larva pond 2; the globe 7 can be moved down to a position where its lower edge is below the top edge of the enclosing wall 21. Two parallel support rods 22 are arranged on the enclosing wall 21, and two sides of the shading curtain cloth 23 are respectively installed on the support rods 22 through a plurality of hanging rings 24. The drainage device also comprises an outer pipe 85, the upper ground pipe 82 is arranged on the inner side of the outer pipe 85, and the bottom of the outer pipe 85 is provided with a plurality of water permeable holes 851. The drainage device further comprises an outer wall body 86, the outer pipe 85 is arranged on the inner side of the outer wall body 86, the outer wall body 86 is provided with a water passing port 861, and the water passing port 861 is provided with a filter screen 87. The upper end surfaces of the upper ground pipe 82 and the casing 83 are respectively provided with a filter grating 88 arranged along the circumferential direction.

The crayfish breeding greenhouse further comprises a ventilation device; the ventilation device comprises a ventilation rolling shutter machine 91, and the ventilation rolling shutter machine 91 is used for rolling up a greenhouse film 92 at the bottom of the sunshine side of the greenhouse so as to form a ventilation opening 93; and a deflector 94 arranged inside the greenhouse and close to the ventilation opening; one side of the guide plate 94 close to the ventilation opening 93 is arranged on a shaft seat 96 through a rotating shaft 95; the ventilation device further comprises a driving device for driving the guide plate 94 to tilt upwards.

Ventilation rolling curtain machine 91 includes installing support 911, install in ventilation gear motor 912 and ventilation serving axle 913 on installing support 911 and connect in first receipts of ventilation serving axle 913 pay off rope 914, ventilation serving axle 913 connects in ventilation gear motor 912 power take off end, the one end of first receipts and pay off rope 914 is fixed in on the installing support 911, downwardly extending behind the hole on the other end passing greenhouse film, and the bypass be fixed in behind the lower extreme of greenhouse film on the ventilation serving axle 913.

The driving device comprises a second winding and unwinding rope 915 and the ventilation rolling machine 91, one end of the second winding and unwinding rope 915 is fixed on the ventilation rope winding shaft 913, and the other end of the second winding and unwinding rope passes through a hole in the greenhouse film and then is fixed on one side of the guide plate 94, which is far away from the rotating shaft 95, so that when the ventilation rope winding shaft 913 rotates and winds up the greenhouse film, the second winding and unwinding rope 915 can pull the guide plate 94 to tilt upwards.

The utility model also provides a greenhouse breeding method for crayfishes, a plurality of ponds are arranged in the greenhouse, breeding shrimps are put into the shrimp breeding pond 1, and hatched shrimp seeds are put into the shrimp seed pond 2; a plurality of mutually independent greenhouse curtain fabrics 5 are arranged above the light-transmitting greenhouse roof 4 of the greenhouse, and each greenhouse curtain fabric 5 is correspondingly provided with a roller shutter machine; at least one greenhouse curtain cloth 5 is used for shielding the sunlight irradiating the shrimp culture pond 1;

the method comprises the following temperature regulation steps:

(11) putting the seed shrimps into the pond in the greenhouse in 7 months, rolling up the greenhouse curtain cloth 5, and keeping the greenhouse to be sufficiently illuminated;

(12) in the middle and late ten days of 10 months, after hatching, the shrimp larvae are trapped and separated to a shrimp larvae pond 2, the greenhouse curtain cloth 5 which shields the sunshine of the shrimp breeding pond 1 is put down all the time, and the rest greenhouse curtain cloth 5 is rolled up in the daytime and put down at night;

(13) during the period from 12 months to 1 month of the next year, the greenhouse curtain cloth 5 for shielding the sunlight of the shrimp culture pond 1 is put down all the time, the rest greenhouse curtain cloth 5 is rolled up at 10 am and put down at 3 pm, and the water temperature is kept above 7 ℃;

(14) after 3 months, the greenhouse curtain cloth 5 for shielding the sunshine of the shrimp culture pond 1 is put down all the time, and the rest greenhouse curtain cloth 5 is rolled up in the day and put down at night; ventilating the greenhouse at noon to avoid overhigh temperature in the greenhouse and keep the water temperature at 8-10 ℃;

(15) after 4 months, the greenhouse curtain cloth 5 for shielding the sunshine of the shrimp culture pond 1 is put down all the time, the rest greenhouse curtain cloth 5 is rolled up, and the interior of the greenhouse is ventilated to keep the water temperature at 10-12 ℃;

(16) after 5 months, the greenhouse curtain cloth 5 which can shield the sunshine of the shrimp culture pond 1 is put down all the time, and the rest greenhouse curtain cloth 5 is rolled up and put down at noon time to ventilate the greenhouse;

the method also comprises the following dissolved oxygen regulation steps:

(21) starting to put the seed shrimps, turning on an oxygenation pump to aerate the pond at night, and turning off the pump in the daytime;

(22) arranging a water storage tank 3 in the greenhouse, filling water into the water storage tank 3 every day, injecting the water in the water storage tank 3 into the pond at night, and simultaneously discharging the water in the pond outwards, wherein the discharged water amount is equal to the injected water amount;

the method also comprises the following illumination regulation and control steps:

(31) for the breeding shrimp pond 1, the illuminating lamp is turned on in the daytime and turned off at night from the time of putting the breeding shrimps to the next 3 months; for the shrimp larvae pond 2, the illuminating lamp is turned on in the daytime and turned off at night from the time of putting the shrimp larvae into the pond to the 3 months of the next year;

(32) after 4 months, 6 hours of off-lamp duration is reserved for the shrimp fry pond 2 at night, and the rest of the time is on.

Adopt above-mentioned technical scheme, the utility model discloses a crayfish breeding method can be implemented through the utility model discloses a crayfish breeding big-arch shelter, from throwing into the breeding shrimp to the hatching of shrimp larvae, and then to the breeding of shrimp larvae, through the mode regulation temperature in the big-arch shelter of rolling up, putting down and control ventilation of control big-arch shelter curtain cloth 5, because the living habits of daytime rest, the activity at night of crayfish, the sunshine and the illumination time of strict control shrimp larvae and breeding shrimp, reduce the growth rate of shrimp larvae, carry out the subregion breeding simultaneously, separate shrimp larvae and breeding shrimp, can be convenient for the subregion illumination, do not impression the mobility of breeding shrimp when reducing shrimp larvae growth rate; in addition, carry out dissolved oxygen regulation and control to the water in the pond, beat oxygen on the one hand at night, on the other hand extract quantitative water from cistern 3 and pour into the pond in, that some water that was taken out in cistern 3 evening can be complemented daytime, and the temperature in cistern 3 simultaneously can keep unanimous with pond temperature basically, so the water in cistern 3 can not arouse pond temperature sudden change after being poured into the pond into basically, avoids directly pouring into cold water into the pond from the external world and causes the interior temperature of water of pond to reduce fast.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a crayfish breeding big-arch shelter which characterized in that: the device comprises a shrimp breeding pond, a shrimp fry pond and a reservoir which are arranged in a greenhouse, and also comprises a sun shading device and a lighting device;

2. The crayfish breeding greenhouse of claim 1, wherein: the lampshade is arranged on the lifting device; the lifting device comprises two balancers, namely a first balancer and a second balancer; the fixed pulley comprises four fixed pulleys positioned on the inner beam of the greenhouse, namely a first fixed pulley, a second fixed pulley, a third fixed pulley and a fourth fixed pulley; the lamp shade comprises four fixed pulleys positioned at the upper part of the lamp shade, namely a fifth fixed pulley, a sixth fixed pulley, a seventh fixed pulley and an eighth fixed pulley; the first balancer and the second balancer are respectively arranged at two ends of the lampshade; ropes are respectively led out from two ends of the balancer, and the first end rope of the first balancer is sequentially wound around the fifth fixed pulley, the first fixed pulley, the second fixed pulley and the sixth fixed pulley and then is connected with the first end rope of the second balancer into a whole; and the second end rope of the first balancer is sequentially wound around the seventh fixed pulley, the third fixed pulley, the fourth fixed pulley and the eighth fixed pulley and then is connected with the second end rope of the second balancer into a whole.

3. The crayfish breeding greenhouse of claim 1, wherein: at least an enclosing wall is arranged on the outer side of the shrimp larva pond; the light shade is movable downwardly to a position where its lower edge is below the top edge of the enclosure.

4. The crayfish breeding greenhouse of claim 1, wherein: at least an enclosing wall is arranged on the outer side of the shrimp larva pond; the enclosure is provided with two parallel support rods, and two sides of the shading curtain cloth are respectively installed on the support rods through a plurality of hanging rings.

5. The crayfish breeding greenhouse of any one of claims 1-4, wherein: the drainage device further comprises an outer pipe, the upper ground pipe is arranged on the inner side of the outer pipe, and a plurality of water permeable holes are formed in the bottom of the outer pipe.

6. The crayfish breeding greenhouse of claim 5, wherein: the drainage device further comprises an outer wall body, the outer pipe is arranged on the inner side of the outer wall body, the outer wall body is provided with a water passing port, and a filter screen is arranged at the water passing port.

7. The crayfish breeding greenhouse of claim 1, wherein: the crayfish breeding greenhouse further comprises a ventilation device; the ventilation device comprises a ventilation rolling shutter machine, and the ventilation rolling shutter machine is used for rolling up the greenhouse film at the bottom of the sunshine side of the greenhouse to form a ventilation opening; the air guide plate is arranged in the greenhouse and close to the ventilation opening; one side of the guide plate close to the ventilation opening is arranged on the shaft seat through a rotating shaft; the ventilation device further comprises a driving device for driving the guide plate to tilt upwards.

8. The crayfish breeding greenhouse of claim 7, wherein: ventilation roll up curtain machine include the installing support, install in ventilation gear motor and ventilation serving on the installing support and connect in the epaxial first receipts of ventilation serving are put the rope, ventilation serving is connected in ventilation gear motor power take off end, the one end of putting the rope in first receipts is fixed in on the installing support, downwardly extending behind the hole that the other end passed on the big-arch shelter membrane, and the bypass the lower extreme after-fixing of big-arch shelter membrane is in on the ventilation serving.

9. The crayfish breeding greenhouse of claim 8, wherein: drive arrangement includes that the second receive and releases the rope and the curtain machine is rolled up in the ventilation, the one end that the rope was received and released to the second is fixed in ventilation serving axle, the other end pass the epimembranal hole after-fixing in of big shed keep away from of guide plate one side of pivot, thereby work as when ventilation serving axle rotates and rolls up the big shed membrane the second receive and releases the rope and can stimulate the upwards perk of guide plate.