Fumigating device for granary

Abstract

The fumigating device comprises a fumigating assembly, an air suction pump and a powder collector, the fumigating assembly comprises a plurality of medicine hoppers, a first connecting pipe and a second connecting pipe, each medicine hopper comprises a lower barrel, a cover plate, a sieve plate and an adjusting mechanism, the sieve plate is fixed in the lower barrel, the cover plate is hinged to the lower barrel, and the powder collector is arranged on the lower barrel. An adjusting mechanism is arranged on the bottom surface of the cover plate; the two side walls of the bottoms of the lower barrels are each provided with a powder discharging opening, the powder discharging openings of every two adjacent lower barrels are communicated through a first connecting pipe, and the powder discharging opening of the lower barrel at the tail end is connected with the input end of the air suction pump through a second connecting pipe. According to the fumigating device for the granary, the gap with the adjustable opening degree is formed between the cover plate and the opening in the top face of the lower barrel, the size of the gap is controlled through the adjusting mechanism, then the reaction speed of a fumigant is controlled, it is ensured that gas generated after deliquescence of the fumigant is slowly released, the effective concentration maintaining time is prolonged, and the fumigating effect is improved. The fumigating insecticidal effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of granary fumigation, in particular to a fumigation device for a granary. Background Art

[0002] Grain fumigation is an insecticide operation in grain storage. Due to the influence of climate and environment, insect pests may appear in large numbers in grain. Fumigation is an effective method to kill pests in stored grain. Under sealed conditions, a certain amount of aluminum phosphide, calcium phosphide, zinc phosphide, dichlorvos and other drugs are buried in the grain pile to make the above-mentioned phosphides absorb the moisture in the air and grain in the grain pile, produce chemical reactions, and release highly toxic phosphine gas to kill various pests and insect eggs in the grain pile.

[0003] The concentration of grain fumigation is an important factor affecting the pest control effect. Reasonable control of the concentration of fumigants can better control the reproduction and recurrence of pests. Once the fumigant contacts the air or moisture in the grain, a chemical reaction will occur. At present, the most common method of applying pesticides in my country's granaries is to use a dosing tray, such as the Chinese utility model patent CN2615081Y. In a sealed granary, the fumigant (mainly aluminum phosphide) is placed on the screen of the dosing tray to make it naturally deliquesce to produce phosphine gas. Because the phosphine gas produced after the fumigant deliquesces is highly toxic, the dosing tray method is to put a sufficient amount of fumigant into the dosing tray at one time, and then close the granary door. Therefore, the overall phosphine concentration in the granary will show a trend of being high at the beginning of the application, and then gradually decreasing during the entire fumigation period. The phosphine concentration in the granary cannot be kept in a balanced state, the fumigation effect is poor, and it may not have a good insecticide effect. The fumigant residue after the reaction falls through the screen to the bottom of the dosing tray, which needs to be manually cleaned, increasing the workload. Utility Model Content

[0004] The utility model provides a fumigation device for a granary, aiming to solve the problems that the existing fumigation device for a granary cannot keep the concentration of phosphine gas in the granary in a balanced state, has a poor fumigation effect, and cannot achieve a good insecticide effect.

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

[0006] A fumigation device for a granary comprises a fumigation assembly, an air suction pump and a powder collector. The fumigation assembly comprises a plurality of medicine hoppers, a first connecting pipe and a second connecting pipe. Each medicine hopper comprises a lower cylinder, a cover plate, a sieve plate and an adjusting mechanism. A horizontally placed sieve plate is fixed in the lower cylinder, a fumigant is placed on the sieve plate, a plurality of sieve holes are provided on the sieve plate, the cover plate is hinged to the lower cylinder, an adjusting mechanism is provided on the bottom surface of the cover plate, so that an adjustable gap is formed between the cover plate and the top surface opening of the lower cylinder; a powder discharge port is respectively provided on the two side walls at the bottom of the lower cylinder, the powder discharge ports of two adjacent lower cylinders are connected through the first connecting pipe, the powder discharge port of the lower cylinder at the end is connected to the input end of the air suction pump through the second connecting pipe, and the output end of the air suction pump is connected to a powder collector.

[0007] Furthermore, the above-mentioned adjustment mechanism includes a fixing rod and an adjusting bolt. One end of the fixing rod is fixedly connected to the cover plate, and the other end is provided with a threaded hole. The screw rod of the adjusting bolt is cooperatively connected to the threaded hole, and the head of the adjusting bolt is supported on the upper surface of the screen plate.

[0008] Furthermore, it comprises a plurality of groups of fumigation components, and the output end of each group of fumigation components is communicated with the input end of the suction pump.

[0009] Furthermore, a control valve is provided on the pipeline of the second connecting pipe in each group of fumigation components.

[0010] Furthermore, the above-mentioned air suction pump, powder collector and control valve are arranged outside the granary.

[0011] Furthermore, the lower cylinder is in an inverted cone shape.

[0012] From the above description of the structure of the utility model, it can be seen that the utility model has the following advantages:

[0013] 1. The utility model provides a fumigation device for a granary. The cover plate is hinged to the lower cylinder. An adjusting mechanism is provided on the bottom surface of the cover plate to form an adjustable gap between the cover plate and the top opening of the lower cylinder. The size of the gap can be controlled by the adjusting mechanism, thereby adjusting the contact area between the fumigant and the air on the sieve plate, controlling the reaction speed of the fumigant, ensuring that the gas generated after the fumigant is deliquesced can be slowly released, prolonging the effective concentration maintenance time, and improving the fumigation and insecticide effect.

[0014] 2. After the fumigant reacts, it turns into powder and falls into the lower cylinder through the sieve holes. A small part of the powder that does not fall into the lower cylinder is forced to pass through the sieve holes by the suction pump, and the unreacted fumigant retained on the sieve plate continues to fully contact with the moisture in the air to react. When all the powder residues in the warehouse are cleaned up and fully ventilated, personnel can enter the granary without wearing a respirator to remove the fumigation device, avoiding the risk of poisoning caused by personnel entering the granary to clean the powder residues, while reducing labor intensity and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the working state of the medicine bucket of the utility model.

[0017] Figure 3 This is a schematic diagram of the medicine hopper of the utility model in an open state of the cover plate.

[0018] In the figure: 10-fumigation assembly; 20-air suction pump; 30-powder collector; 40-medicine hopper; 41-lower cylinder; 411-powder discharge port; 42-cover plate; 43-sieve plate; 44-adjusting mechanism; 441-fixing rod; 442-adjusting bolt; 50-first connecting pipe; 51-second connecting pipe; 60-control valve. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details. For well-known components, methods and processes, they are not described in detail below.

[0020] A fumigation device for granary, referring to Figures 1 to 3 , including a fumigation assembly 10, an air pump 20 and a powder collector 30. The fumigation assembly 10 includes a plurality of medicine hoppers 40, a first connecting pipe 50 and a second connecting pipe 51. Each medicine hopper 40 includes a lower cylinder 41, a cover plate 42, a sieve plate 43 and an adjustment mechanism 44. The lower cylinder 41 is an inverted cone. A horizontally placed sieve plate 43 is fixed in the lower cylinder 41. The sieve plate 43 is provided with a plurality of sieve holes. The calculated amount of fumigant powder is placed on the sieve plate 43. The aperture of the sieve hole is smaller than the particle size of the fumigant. The fumigant commonly used in granaries is usually aluminum phosphide. Aluminum phosphide can absorb moisture in the air when exposed to the air and decompose to produce phosphine gas.

[0021] Reference Figure 2The cover plate 42 is hinged to the lower cylinder 41, and an adjustment mechanism 44 is provided on the bottom surface of the cover plate 42. The adjustment mechanism 44 includes a fixing rod 441 and an adjusting bolt 442. One end of the fixing rod 441 is fixedly connected to the cover plate 42, and the other end is provided with a threaded hole. The screw of the adjusting bolt 442 is matched with the threaded hole, and the head of the adjusting bolt 442 is supported on the upper surface of the sieve plate 43, so that an adjustable gap is formed between the cover plate 42 and the top surface opening of the lower cylinder 41.

[0022] Reference Figure 1 A powder discharge port 411 is provided on each side wall of the bottom of the lower cylinder 41. The powder discharge ports 411 of two adjacent lower cylinders 41 are connected through a first connecting pipe 50. The powder discharge port 411 of the last lower cylinder 41 is connected to the input end of the suction pump 20 through a second connecting pipe 51, and the output end of the suction pump 20 is connected to a powder collector 30.

[0023] Reference Figure 1 After the powder residue in the medicine hopper 40 of each fumigation assembly 10 falls into the bottom of the medicine hopper 40, it is sucked into the first connecting pipe 50 through the powder discharge port 411 under the action of the suction pump 20, and then concentrated into the powder collector 30 through the second connecting pipe 51 for unified collection and treatment. The utility model includes multiple groups of fumigation assemblies 10, and the output end of each group of fumigation assemblies 10 is connected to the input end of the suction pump 20.

[0024] Reference Figure 1 A control valve 60 is provided on the pipeline of the second connecting pipe 51 in each fumigation assembly 10.

[0025] Reference Figure 1 The air suction pump 20, the powder collector 30 and the control valve 60 are arranged outside the granary.

[0026] Reference Figures 1 to 3 , the required amount of fumigant is calculated according to the volume of grain stored in the granary, and the medicine hoppers 40 are evenly arranged on the grain surface before applying the medicine. In this embodiment, every thirty medicine hoppers 40 form a group of fumigation components 10. When applying the medicine, the fumigant is poured onto the sieve plate 43, and the cover plate 42 is covered. The head of the adjusting bolt 442 is supported on the sieve plate 43, and the size of the gap formed between the cover plate 42 and the top surface opening of the lower cylinder 41 is controlled by rotating the adjusting bolt 442, so as to control the contact area between the fumigant and the air, thereby adjusting the reaction speed of the fumigant and ensuring that the phosphine gas is slowly released. After the fumigant reacts, it turns into powder and falls into the lower cylinder 41 through the sieve holes on the sieve plate 43. The control valve 60 is opened, and the powder is sucked out into the powder collector 30 by the suction pump 20 outside the granary. The powder remaining on the sieve plate 43 that has not fallen into the lower cylinder 41 is also sucked into the lower cylinder 41, ensuring that the unreacted fumigant retained on the sieve plate 43 continues to fully contact and react with the moisture in the air.

[0027] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A fumigation device for a granary, characterized in that: The utility model comprises a fumigation component, an air suction pump and a powder collector. The fumigation component comprises a plurality of medicine hoppers, a first connecting pipe and a second connecting pipe. Each of the medicine hoppers comprises a lower cylinder, a cover plate, a sieve plate and an adjusting mechanism. A horizontally placed sieve plate is fixed in the lower cylinder, a fumigant is placed on the sieve plate, a plurality of sieve holes are provided on the sieve plate, the cover plate is hinged to the lower cylinder, an adjusting mechanism is provided on the bottom surface of the cover plate, so that an adjustable gap is formed between the cover plate and the top surface opening of the lower cylinder; a powder discharge port is respectively provided on the two side walls at the bottom of the lower cylinder, the powder discharge ports of two adjacent lower cylinders are connected through the first connecting pipe, the powder discharge port of the lower cylinder at the end is connected to the input end of the air suction pump through the second connecting pipe, and the output end of the air suction pump is connected to one of the powder collectors.

2. A fumigation device for a granary according to claim 1, characterized in that: The adjustment mechanism includes a fixing rod and an adjusting bolt. One end of the fixing rod is fixedly connected to the cover plate, and the other end is provided with a threaded hole. The screw rod of the adjusting bolt is matched and connected to the threaded hole, and the head of the adjusting bolt is supported on the upper surface of the screen plate.

3. A fumigation device for a granary according to claim 1, characterized in that: It comprises a plurality of groups of fumigation components, and the output end of each group of the fumigation components is communicated with the input end of the suction pump.

4. A fumigation device for a granary according to claim 3, characterized in that: A control valve is provided on the pipeline of the second connecting pipe in each group of the fumigation components.

5. A fumigation device for a granary according to claim 4, characterized in that: The air suction pump, powder collector and control valve are arranged outside the granary.

6. A fumigation device for a granary according to claim 1, characterized in that: The lower cylinder is in an inverted cone shape.

Images