Technical solutions for greenhouse construction
1. Main body of the greenhouse
1. Main structure:
WJL9.6-4.0 hollow solar panel greenhouse.
2. Performance indicators:
2.1) Wind pressure: 0.6 KN∕㎡
2.2) Snow load: 0.5 KN∕㎡
2.3) Hanging load: 15kg∕㎡
2.4) Maximum rainwater discharge: 140mm∕h
2.5) Power supply parameters: 220V, 50Hz, PH1∕380V, 50Hz, PH3< /p>
3. Specifications and dimensions:
3.1) Building width: 9.6 m
3.2) Building distance: 4 m
3.3) Gutter (Height from the bottom of the rain gutter to the bottom of the column): 4.0 m
3.4) Top height (height from the ridge to the bottom of the column): 4.78 m
3.5) Roof angle: about 22 degrees
p>4. Arrangement:
4.1) The direction of the greenhouse roof is east-west
4.2) Gable length (east-west): 9.6 m×7 (number of spans) = 67.2 m
4.3) Side wall length (north and south): 4.0 m×12 (number of bays) = 48m
4.4) Total area: 3225.6m?
5. Structure and covering materials:
The main frame of the greenhouse is made of domestic hot-dip galvanized steel pipes and steel plates.
It mainly includes:
The main column is 100×50× The upper and lower chords of the 2.5 hot-dip galvanized rectangular tube lattice structure are made of 50×50 rectangular tubes, and the web rods are welded with 30 angle steel. A rectangle with 50*30*2 or 50*50*2 beams on all sides. The rain gutter is made of 2.0mm thick galvanized sheet, and the hot-dip galvanizing specification for parts adopts GB/T3091-93.
The top and surrounding sides of the greenhouse are covered with domestic high-quality 8mm solar panels.
6. Doors and greenhouse basics:
6.1) Doors:
The greenhouse is equipped with 2 aluminum alloy sliding doors, the location of which is to be discussed by Party A . 6.2) Foundation:
The greenhouse foundation is 1.2 meters deep, and C25 concrete is poured on site (can be adjusted appropriately according to local address conditions). The greenhouse has a point foundation inside, strip foundations are used around it, and ring beams are cast on-site to improve the overall strength of the greenhouse.
A No. 150 water slope with a thickness of 10 centimeters, a width of 0.8 meters, and a slope of 4% is built around the outside of the greenhouse to prevent the foundation from being directly washed away.
The greenhouse is surrounded by a 0.5-meter-high wall skirt. (The civil part is not included in the quotation)
7. Greenhouse roof and drainage
This type of smart greenhouse has a one-span three-spire structure. The greenhouse is equipped with a 2.5‰ rain gutter slope single-end drainage.
2. Greenhouse basic civil construction
Referring to the drawings provided by Party B, Party A will build it by itself.
3. External and internal sunshade systems
1. External shading system
The external shading system blocks excess sunlight outdoors in summer, forming shade, protecting the flower crops in the greenhouse from strong light burns, and creating a suitable growing environment for the crops. The sunshade curtain can control indoor humidity and maintain appropriate heat levels, allowing sunlight to diffuse into the greenhouse planting area and maintain the best crop growth environment.
1.1 Technical performance
Stroke (m)
4.20
Running speed (m∕min)
0.29
One-way running time (min)
14.47
Power supply (three-phase ∕hz)
380v
Motor power (kw)
0.55
1.2 Basic system composition
1) External sunshade structure:
2 sets installed on the top of the greenhouse The outer sunshade frame uses 50*50*2 as the columns, the connecting rods use 40*40*2, 40*40*2 galvanized square tubes, and the galvanized square tubes and connectors are used between the buildings to form a grid structure. The bracket part has reliable strength and beautiful appearance.
2) Rotating mechanism:
Using a domestic rack rotating mechanism, the power is output through the transmission shaft connected to the reduction motor.
The transmission shaft is made of Φ32×3.0 hot-dip galvanized rectangular steel pipe, the middle part is connected to the motor, and the rest of the racks are evenly connected; the push-pull mechanisms are all hot-dip galvanized parts arranged horizontally to pull the curtain surface to open and close. Make the curtain flat and beautiful during operation.
3) Curtain wire:
The double-layer curtain wire is made of domestic black polyester curtain wire
4) Control part:
Control The box is equipped with two sets of contactors for curtain expansion and closing, which can be opened and stopped manually, and can realize automatic parking through the travel switch. It can also be controlled by computer to realize temperature control, light control and other steps.
5) Curtain:
Select high-quality black external curtain produced by Green Park Group, with a shading rate of 70%.
6) Control partitions:
The number of shading control partitions is equal to the planting score of the greenhouse. The greenhouse external shading system is divided into 2 control areas.
2. Internal shading system (rack rotation)
The internal shading system can improve the ecological environment of the greenhouse in many aspects. In summer, the sunshade curtain can reflect part of the sunlight and diffuse the sunlight into the greenhouse, evenly illuminating the plants, protecting the plants from barrel burns, and reducing the temperature of the greenhouse by 4-6°C. Different shades can be formed by selecting different curtains. efficiency to meet the needs of different crops for sunlight; at night in winter, the internal shading and insulation system can effectively prevent infrared rays from escaping, reduce ground radiation heat loss, reduce thermal energy consumption, and greatly reduce greenhouse operating costs.
Technical performance
Motor model:
DWPSV63-1 (domestic)
Stroke (m)
4.20
Running speed (m∕min)
0.29
One-way running time (min)
14.47
Power supply (three-phase ∕hz)
380v
Motor power (kw)
0.55
2.1 Basic system composition
2.1.1) Control box and power supply
This box can flexibly control the expansion, closing and stopping of the sunshade curtain. When the sunshade curtain is controlled by a computer, a transfer switch is installed on the electric control box, so that it can be realized automatically or manually (electrically), and the operation is flexible and changeable. The motor has its own working fiber and safety limit, making its action safe and reliable.
.2.1.2) Rack pair
Using imported/domestic rack pairs, the product quality is reliable and the operation is stable.
2.1.3) Transmission part
The transmission part consists of a reduction motor and supporting components, and the power is output through a transmission shaft connected to the reduction motor.
The transmission shaft is made of Φ32*3.0 hot-dip galvanized steel pipe. The middle part is connected to the motor, and the remaining parts are evenly connected to the rack pair/rack seat to convert surrounding motion into smooth linear motion.
The push-pull rod is a Φ25×21.7 galvanized steel pipe. Each set of racks is connected in one row, and the longitudinal direction is basically the same as the length of the greenhouse. The driving curtain rod connected with the push-pull rod is made of aluminum profile, arranged horizontally, and pulls the curtain to open and close, so that the curtain is flat and beautiful during operation.
2.1.4) Curtain line
The curtain line is made of domestic transparent polyester curtain line.
This greenhouse is divided into three areas for independent control.
The curtain uses the ASN65 aluminum thermal insulation sunshade screen produced by Green Park Group Company.
IV. Natural ventilation system
The top adopts an electric window opening system, equipped with The gear and rack type electric window opening ventilation structure realizes the top opening of the window, allowing convection inside and outside the greenhouse to achieve dehumidification and cooling effects. There is a swing arm window motor in the corridor to facilitate wet curtain ventilation. This greenhouse adopts single-side track opening windows, with a specification of 1 m×4 m per fan, and a maximum of 126 windows.
1. Working principle:
Transmission machinery: gear and rack transmission, single-sided track windows on each spire at the top of the greenhouse. Press the start switch button of the control box to start the motor. The motor drives the transmission shaft through the transmission mechanism. The transmission shaft drives the gear movement through the connecting assembly. After the skyside window is opened in place, the stroke limiter switch is touched. The motor stops and the stroke is completed.
The control box is equipped with manual control. If you need to stop midway, you can press the stop button to stop running at the desired position.
2. Basic components of the system:
This system includes a control box greenhouse special motor, transmission part, travel limit switch and other components.
2.1) Power supply: 380V, 50HZ
2.2) Power supply motor power: 0.55KW, 2 window motors are required, which are domestic high-quality products.
2.3) Reduction ratio: 1:500
2.4) Output speed: 2.8rpm
Technical parameters of gear pair:
2.5) Module: 4
2.6) Material: Q235A galvanized anti-corrosion
2.7) Structural form: rack, gear
2.8) The skylight is divided into two independent The control areas can be controlled separately to facilitate practicality.
5. Wet curtain/fan cooling system
1. Working principle:
The wet curtain/fan cooling system uses the evaporation cooling principle of water to achieve cooling purposes.
The system uses domestic high-quality wet curtains, water pump systems and domestic high-quality large air volume fans.
The core of the cooling system is a wet curtain that allows water to evaporate. It is made of corrugated fiber paper bonded. Due to the special chemical components added to the raw materials, it is corrosion-resistant and has a long service life. The special water-conveying wet curtain can ensure that water evenly wets the entire cooling wet curtain wall. When the air penetrates the wet curtain medium, the water and gas exchange with the surface of the humidified medium converts the moist heat of the air into the latent heat of vaporization, thereby humidifying and cooling the air.
The wet curtain is usually installed in the greenhouse corridor, and the fans are installed at both ends of the greenhouse. When cooling is needed, the fan is started to force the air out of the greenhouse to create negative pressure; at the same time, the water pump pumps water onto the wet curtain wall opposite. When the outdoor air is sucked into the room by negative pressure, it passes through the gaps in the wet curtain at a certain speed, causing the water to evaporate and cool down. The cold air flows through the greenhouse, absorbs the indoor heat, and is discharged through the fan, thereby achieving the purpose of cooling.
The system uses an aluminum alloy frame, which has the characteristics of beautiful appearance and small thermal deformation.
2. Basic configuration
Wet curtain: 1.5m high, 115.2m long,
including aluminum alloy frame.
With good maintenance, the service life is 5-10 years.
Water pumps: 4 units, water pump motor power 0.75w/unit.
Water supply device: 4 sets
Fans: 24 sets, overall dimensions 1380×1380×405,
The exhaust volume is about 40000m?/set, power consumption 1.1kw/unit.
Outside window sealing.
VI. Greenhouse heating system
1. Parameters and calculations:
The hot water inlet and outlet temperature is T1=90℃ T1=90℃, and the indoor design temperature is For the requirements of different functional areas, check the local outdoor weather and meteorological parameters in GBJ19-87 Heating, Ventilation and Air Conditioning Design Specifications.
The heat load calculation is performed based on the outdoor heating calculation temperature of -17℃ and the indoor temperature design requirement of 15℃.
2. Heating instructions (water heating)
2.1) Adopt double-tube same-program process
2.2) Adopt round-wing radiator
< p>2.3) The radiator pipes are placed in the second row of each group on both sides of the column, and are connected with 42 hot-dip galvanized pipes. Welding is used to ensure that there is no leakage. The main water pipe is located in the heating ditch in the middle of the greenhouse and needs to reserve an outlet. Party B will connect the pipes. The 0.5-meter greenhouse is configured by Party A.2.4) Two rows of heating pipes are installed around the greenhouse.
7. Power distribution system
According to the working requirements of the greenhouse, control the skylight motor, inner and outer curtain motors, outward-turning windows, fans, wet curtains, water pumps, etc.
1. Wiring design:
1.1) Moisture-proof RVV plastic sleeves are used in the greenhouse, and the sockets are waterproof and moisture-proof.
1.2) In order to make the greenhouse beautiful, the wiring is through pipes.
1.3) Set up a grounding electrode as needed and lead the grounding wire to the required location.
1.4) Including all power lines, control lines, sensor signal and other wires and electrical installation dressings in the greenhouse.
2. System description:
The greenhouse requires no less than 42KW of electricity. It is equipped with two strong current control cabinets. The user is responsible for the transformers and other components. The main power cord (three-phase Four wires) is connected to the electric control box of the greenhouse (the voltage fluctuation cannot exceed 10%). We are responsible for the internal components and wiring.
3. Basic materials:
The materials in the greenhouse mainly include electrical control boxes, various types of insulated wires and cables, various specifications of cable ties, wire tubes, waterproof and splash-proof sockets, and corner connections. , waterproof tape, tee, two-way, sealing gasket, C-shaped pipe, cable joint. All wires and cables use national standard copper core products, and the electrical components in the electric control box all use domestic famous brand products.
4. The main electrical loads of the greenhouse are as follows:
(1) Skylight motor (3P): 0.75KW/unit×1 unit=0.75K
(2 ) Outward-turning window motor (3P) 0.37 KW/unit × 2 units = 0.74KW
(3) Wet curtain pump (3P): 0.75KW/unit × 2 units = 1.5KW
< p>(4) Fan (3P): 1.1KW/unit×14 units=16.4KW(5) External sunshade net motor (3P): 0.75KW/unit×1 unit=0.75KW
p>(6) Inner sunshade net motor (3P): 0.75KW/unit×1 unit=0.75KW
(7) Electronic control system: 3KW
Total: 24KW
The company’s project cases in the past two years (completed)
2010-2011
* Sichuan Zigong Agricultural Base, with a construction area of more than 10,000 square meters .
*Zhejiang Jiaxing Flower and Bird Port Fishery Base has a construction area of more than 8,000 square meters.
*Zhejiang Shaoxing Green Food Agriculture has a construction area of more than 15,000 square meters.
* Inner Mongolia Zhuozi Greenhouse Vegetable Production Base has a construction area of 3,400 square meters.
*Shanxi Linhe greenhouse vegetable production base has a construction area of 3,600 square meters.
* Shandong Dongying greenhouse vegetable production base, with a construction area of 2016 square meters.
Shouguang Dexin Agricultural Technology Co., Ltd. is located in Shouguang, Shandong Province, which is known as the "Hometown of Vegetables". To the north is the Shouguang Vegetable High-tech Demonstration Park, which was established in 2008 with a total investment of 5 million yuan and 226 employees.
The company is a high-tech enterprise specializing in greenhouse engineering research and design, installation and construction, vegetable planting and sales, and technical guidance services. The company has more than 50 technical experts, more than 60 sets of various construction equipment, and a professional construction team of more than 200 people. Whether it is the design and construction of the early stage of greenhouse construction or the management and service system of vegetable planting technology in the later stage, they are all at the leading level in the industry. The company is currently participating in the formulation of ISO9000 quality system certification in the industry.
Since its establishment, the company has relied on its rich experience and professional production processes in Shouguang, Shandong, Gaoqing, Zibo, Ningyang, Tai'an, Yulin, Shaanxi, Chifeng, Inner Mongolia, Baoding, Hebei, Harbin in Northeast China, Pizhou, Jiangsu, More than 30 bases have been established in Suzhou, Anhui, Guyang, Ningxia, Jincheng, Shanxi, Taiyuan, Yangquan and other provinces and cities. With strong technical capabilities...