Greenhouse capable of removing accumulated snow on roof in knocking mode

Abstract

The utility model belongs to the technical field of greenhouses, and relates to a greenhouse capable of removing accumulated snow on the top of the greenhouse in a knocking mode, the greenhouse is in a closed state during knocking snow removal, and the greenhouse comprises a greenhouse main body and a knocking device; wherein a detonation framework is arranged in the greenhouse body in the longitudinal direction, a plurality of detonation points are arranged on the detonation framework at intervals, the detonation devices are installed and fixed to the detonation points, explosives in the detonation devices give out vibration brittle sound at the burning and explosion moment, and hot gas released at the burning and explosion moment acts on the greenhouse film. According to the greenhouse, the detonation device in the greenhouse is ignited, hot gas released by the detonation device at the burning explosion moment acts on the greenhouse film, the greenhouse film is instantly expanded and then is instantly restored to the original shape, accumulated snow on the greenhouse film is shaken off, the purpose of removing snow is achieved, and the greenhouse has the advantages that the snow removing effect is good, cost is low, and the service life of a greenhouse framework cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of greenhouse, relates to a greenhouse for removing snow on the roof by explosion mode. BACKGROUND

[0002] The greenhouse has the advantages of high heat preservation capacity and low construction cost, and has been widely used in the north. However, snow removal in winter is always a problem. The commonly used snow removal methods include: (1) manual snow removal method, i.e. using a snow rake, a scraper or other tools to push or pull the snow, so that the snow slides along the greenhouse film or the heat preservation layer; (2) mechanical snow removal method, mainly using a snow blower or a track-type snow remover or vibrating the greenhouse frame by mechanical vibration to remove the snow; (3) heating snow melting method; and (4) chemical snow removal method. However, the above four snow removal methods have some disadvantages, for example: the manual snow removal method has low efficiency, takes a long time to remove snow in a large area, requires a large amount of labor, and may damage the greenhouse film due to improper operation. The snow blower has a high noise and a long duration, and has a high equipment purchase cost. In addition, the snow blower has poor snow removal effect for deep snow. The track-type snow remover has a limited snow removal range, and cannot remove the snow outside the track. In addition, the maintenance and repair cost of the equipment is high. If the track is damaged or the snow affects the operation of the track, the snow remover cannot work normally. The mechanical vibration method of vibrating the greenhouse frame has damage to the greenhouse structure, shortens the service life of the greenhouse, and has low snow removal efficiency, which can only remove the snow in a small area. The heating snow melting method has high energy consumption and high operation cost, requires special heating equipment and power supply, has high initial equipment investment, and has complex maintenance and high cost when the heating equipment is damaged. If there is too much or too thick snow, the snow melting speed may not keep up with the snowfall. In addition, if the melted snow cannot be discharged in time, it will cause water accumulation and ice formation. The chemical snow removal method uses chemical agents (snow melting agents) which may cause environmental pollution to the soil and vegetation, and may corrode the greenhouse film and metal facilities. In addition, for thick snow, the snow melting effect of the chemical agents is limited, and other snow removal methods need to be used. Therefore, the existing snow removal methods have some disadvantages, and cannot effectively solve the problem of snow on the roof of the greenhouse. SUMMARY

[0003] In view of the above technical problems and defects, the utility model breaks the conventional snow removal method, and provides a new greenhouse for removing snow on the roof by explosion mode. The greenhouse is provided with an explosion device inside. The explosion device is ignited to make the hot gas released by the explosion device in the explosion moment act on the greenhouse film, so that the greenhouse film expands instantaneously and then returns to the original state instantaneously, thereby shaking off the snow on the greenhouse film, achieving the purpose of snow removal. The snow removal method has the advantages of good snow removal effect, low cost, and no influence on the service life of the greenhouse frame.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A greenhouse shed for removing snow on the roof by detonation, the greenhouse shed is in a closed state when removing snow by detonation, and the greenhouse shed comprises a shed main body and a detonator; wherein a detonation framework is arranged in the shed main body in the longitudinal direction, a plurality of detonation points are arranged at intervals on the detonation framework, and the detonator is fixed at the detonation points; an explosive in the detonator emits a cracking sound at the moment of detonation, and hot gas released at the moment of detonation acts on the shed film.

[0006] As a preferred embodiment of the present utility model, a controller is installed in the greenhouse shed, and a sensor is installed outside the greenhouse shed; the sensor is used for monitoring the snowfall and sending a monitoring signal to the controller; and the controller controls the interval time of detonation of the detonator according to the snowfall monitored by the sensor.

[0007] As a preferred embodiment of the present utility model, the explosive in the detonator is a gas or a solid; in the detonation process, the explosive does not catch fire, does not cause injury by explosion, and does not pollute the environment.

[0008] As a preferred embodiment of the present utility model, the detonator comprises an explosion-proof main body and a fuel tank; wherein a fuel channel and an air channel are arranged in the explosion-proof main body; one end of the fuel channel is connected with the fuel tank, the other end is communicated with a detonation chamber, and a fuel valve is arranged at the end close to the fuel tank; an air inlet valve is arranged at the outer port of the air channel, and the other end is communicated with the detonation chamber; an igniter is arranged in the detonation chamber; one end of the detonation chamber, which is away from the fuel channel, is communicated with a detonation channel, and the outer port of the detonation channel is connected with a smoke eliminator; and a combustible gas is arranged in the fuel tank; the hot gas released at the moment of detonation of the combustible gas in the detonation chamber enters the shed through the detonation channel and the smoke eliminator and acts on the shed film.

[0009] As a preferred embodiment of the present utility model, the shed film is a polyethylene film, which comprises an inner film and an outer film.

[0010] As a preferred embodiment of the present utility model, the combustible gas comprises liquefied natural gas.

[0011] Advantages and beneficial effects of the present utility model:

[0012] (1) The greenhouse shed provided by the present utility model adopts a brand-new and original detonation snow removal method, fully utilizes the deformable characteristics of the shed film, and takes advantage of the characteristics of the hot gas released by the detonator to expand instantaneously and restore instantaneously, so that the shed film expands and restores to the original state, and the snow on the roof is shaken off in this process, thereby achieving the purpose of removing snow; the greenhouse shed can remove relatively thick snow, has good snow removal effect, and has low cost; and since the greenhouse shed mainly acts on the shed film, the service life of the shed framework is not affected.

[0013] (2) The greenhouse provided by this utility model can reasonably control the explosive equivalent that should be arranged at each detonation point, which can ensure that the greenhouse film expands at the moment of combustion and explosion, but will not damage the greenhouse film and ensure the service life of the greenhouse film.

[0014] (3) The greenhouse provided by this utility model has high snow removal efficiency. One explosion can clear the snow on the roof of the entire greenhouse. In actual operation, multiple explosions can completely remove the snow on the roof.

[0015] (4) The greenhouse using the detonation snow removal method provided by this utility model has certain advantages over the existing greenhouse using the vibration snow removal method. First, the existing vibration snow removal method applies mechanical vibration to the greenhouse frame to dislodge the snow. The vibration energy is easily attenuated during transmission, especially in greenhouses with large spans, where the snow removal effect is poor in areas far from the vibration source. In contrast, the detonation method has a fast shock wave propagation speed and can cover a wider area. Second, long-term vibration may cause fatigue damage to the welding points and connectors of the greenhouse frame, affecting structural stability. The short-term impact of the detonation method usually does not cause cumulative damage. In addition, vibration snow removal is more effective for loose snow, but its snow removal capacity is limited when facing compacted snow or ice crust. The detonation method can directly break up hard snow, improving adaptability. At the same time, the vibration mode needs to be precisely adjusted. Too low a frequency makes snow removal difficult, while too high a frequency may damage the greenhouse structure, making control difficult. The detonation method can achieve a more stable snow removal effect by adjusting the intensity of the shock wave. Finally, due to the limited range of vibration, it is difficult to cover a large area of ​​snow instantly, and its efficiency is low when dealing with large-scale snowfall. In contrast, the blasting method can remove snow faster and more efficiently, reducing the risk of damage to greenhouses. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a detonator installed inside a greenhouse.

[0018] Figure 2 This is a schematic diagram of the detonation device.

[0019] Figure reference numerals: 1. Greenhouse shed; 2. Detonation device; 3. Detonation frame; 4. Controller; 5. Sensor; 21. Explosion-proof body; 22. Fuel tank; 211. Fuel passage; 212. Air passage; 213. Detonation chamber; 214. Fuel valve; 215. Air inlet valve; 216. Ignition device; 217. Detonation passage; 218. Smoke suppressor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be further explained that, unless otherwise explicitly specified and limited, the terms "arranged", "connected" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] As shown in Figure 1 The present embodiment provides a greenhouse for removing snow on the roof by explosion, when the greenhouse is in a closed state for explosion snow removal, the greenhouse comprises a greenhouse main body 1 and an explosion device 2; wherein the explosion skeleton 3 is arranged in the greenhouse main body 1 along the longitudinal direction, a plurality of explosion points (not shown) are arranged on the explosion skeleton 3 at intervals, and the explosion device 2 is fixedly installed at the explosion points. The explosion device 2 emits a cracking sound at the moment of explosion, and the hot gas released at the moment of explosion acts on the greenhouse film.

[0023] It should be noted that in the present embodiment, when explosion snow removal is performed, the greenhouse must be in a closed state. As to how to make the greenhouse in a closed state, the present application does not make any limitation, and those skilled in the art can seal the parts of the greenhouse that are likely to be ventilated by using the existing common sealing method; for example, a sealing edge can be arranged around the inner side (the side facing the inside of the greenhouse) of the door, and the circumference of the door is sealed by the sealing edge; the sealing of other parts can also be performed in this way.

[0024] The greenhouse provided by the present embodiment is in a closed state when explosion snow removal is needed, and then all the explosion devices of the explosion points are ignited at the same time. The hot gas released by the explosion device at the moment of explosion acts on the greenhouse film, so that the greenhouse film expands instantaneously and then returns to its original state instantaneously, thereby removing the snow on the greenhouse film.

[0025] Continue as Figure 1As shown in the embodiment, the controller 4 is installed in the greenhouse, and the sensor 5 is installed outside the greenhouse. The sensor 5 is a JD-XL2 snow sensor, which is used to monitor the snow amount and send the monitoring signal to the controller 4. The controller 4 controls the interval time of each explosion of the detonator 2 according to the snow amount monitored by the sensor 5. The greater the snow amount, the shorter the interval time of each explosion.

[0026] Further, in the embodiment, the explosive in the detonator 2 is gas or solid. In the explosion process, the explosive in the detonator does not burn, does not explode and does not pollute the environment. In addition, in order to ensure that the greenhouse film expands at the moment of explosion of the detonator 2, but will not be damaged, it is necessary to calculate the explosive equivalent (TNT explosive equivalent of yellow explosive) that should be arranged at each explosion point.

[0027] In the embodiment, the explosive equivalent (TNT explosive equivalent of yellow explosive) that should be arranged at each explosion point is calculated according to the vibration energy received by the greenhouse film, the structure of the greenhouse film and the distribution of the explosion points. The specific steps are as follows:

[0028] Step 1. Calculate the greenhouse film area A acted on by each explosion point effect , the expression is:

[0029] A effect =L×W p ;

[0030] Wherein, W p represents the width of the greenhouse film, and L represents the interval between two adjacent explosion points.

[0031] The height of the greenhouse film is usually 7 meters, and the cross section is approximately a semi-cylindrical shape. The total area of the greenhouse film can be calculated in two parts: the width of each section: assuming the width of the greenhouse film is 10 meters; the length of each section: the interval between each explosion point is 15 meters; therefore, the greenhouse film area acted on by each explosion point is about: 10m×15m=150m 2 ;

[0032] Step 2. Calculate the energy E required provided by each explosion point, the expression is:

[0033] E required =e×A effect ;

[0034] Wherein, e is the vibration energy received by each square meter of the greenhouse film;

[0035] Step 3. Calculate the explosive equivalent:

[0036] The energy E required provided by the explosion point is provided by the explosive of the detonator. The energy of the explosive usually has a certain relationship with its equivalent (TNT equivalent), Eexplosive is the energy released by the explosion of the explosive, E explosive = Q x W;

[0037] Since E required = E explosive , the mass of the explosive required can be calculated according to the energy E required required to be provided at each explosion point, and the calculation formula is:

[0038]

[0039] wherein Q is the energy release efficiency of the explosive (which will vary according to different materials, for example, the energy release efficiency of TNT is about 4.184 MJ / kg), and W is the mass of the explosive (unit: kg);

[0040] Then, the equivalent amount of explosive required can be calculated by using the energy release efficiency of TNT. For example, if TNT is selected as the explosive (the energy released by each kilogram of TNT is about 4.184 MJ / kg), then:

[0041]

[0042] Taking a greenhouse film made of polyethylene (PE) film, including an inner film and an outer film, as an example, the thickness of the inner film is 0.08 mm, and the thickness of the outer film is 0.12 mm. The greenhouse film is tested to receive a vibration energy e = 100 J / m 2 per square meter, and then the energy required at each explosion point is:

[0043] E required = 100 J / m 2 x 150 m 2 = 15000 J

[0044] If TNT is selected as the explosive, the equivalent amount of TNT required at each explosion point can be calculated as:

[0045]

[0046] This means that about 3.6 grams of TNT equivalent is required at each explosion point.

[0047] Further, as Figure 2As shown, the detonator provided by the embodiment comprises an explosion-proof main body 21 and a fuel tank 22; wherein the explosion-proof main body 21 is internally provided with a fuel passage 211 and an air passage 212, the fuel passage 211 is connected with the fuel tank 22 at one end and communicated with a detonation chamber 213 at the other end, and a fuel valve 214 is arranged at the end close to the fuel tank 22; the outer port of the air passage 212 is provided with an air inlet valve 215, and the other end is communicated with the detonation chamber 213; the detonation chamber 213 is internally provided with an igniter 216, the end of the detonation chamber 216 away from the fuel passage 211 is communicated with a detonation passage 217, and the outer port of the detonation passage 217 is connected with a smoke eliminator 218; the fuel tank 22 is internally provided with combustible gas, the hot gas released at the moment of combustion and explosion of the combustible gas in the detonation chamber 213 enters the shed through the detonation passage 217 and the smoke eliminator 218 and acts on the shed film; the combustible gas is liquefied natural gas.

[0048] It should be noted that the detonator in the embodiment can adopt the detonator with the above structure, and of course, can be designed with reference to the structure of the existing salute device, and the specific structure of the detonator is not limited in the application.

[0049] The above is the specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A greenhouse that removes snow from its roof using a detonation method, characterized in that, The greenhouse is in a sealed state when detonating snow removal. The greenhouse includes a main body and a detonator. A detonator frame is arranged longitudinally inside the main body of the greenhouse. Multiple detonation points are arranged at intervals on the detonator frame. The detonator is installed and fixed at the detonation point. The explosive in the detonator emits a crisp sound at the moment of combustion and explosion, and the hot gas released at the moment of combustion and explosion acts on the greenhouse film.

2. A greenhouse for removing snow from the roof by detonation as described in claim 1, characterized in that, A controller is installed inside the greenhouse, and a sensor is installed outside the greenhouse. The sensor is used to monitor the amount of snow and send the monitoring signal to the controller. The controller controls the interval between each detonation of the detonator based on the amount of snow monitored by the sensor.

3. A greenhouse for removing snow from the roof by detonation as described in claim 1, characterized in that, The explosive material inside the detonator is either gas or solid.

4. A greenhouse for removing snow from the roof by detonation as described in claim 1, characterized in that, The detonator includes an explosion-proof body and a fuel tank. The explosion-proof body contains a fuel channel and an air channel. One end of the fuel channel is connected to the fuel tank, and the other end is connected to the detonation chamber. A fuel valve is located at the end near the fuel tank. An air inlet valve is located at the outer port of the air channel, and the other end is connected to the detonation chamber. An igniter is located within the detonation chamber. The end of the detonation chamber away from the fuel channel is connected to the detonation channel, and a smoke suppressor is connected to the outer port of the detonation channel. Combustible gas is contained in the fuel tank. The hot gas released during the combustion of the combustible gas in the detonation chamber passes through the detonation channel and the smoke suppressor before entering the greenhouse and acting on the greenhouse film.

5. A greenhouse for removing snow from the roof by detonation as described in claim 1, characterized in that, The greenhouse film is a polyethylene film, comprising an inner film and an outer film.

6. A greenhouse for removing snow from the roof by detonation as described in claim 4, characterized in that, The combustible gas includes liquefied natural gas.

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