A fumigator

Abstract

The utility model provides a fumigator, it can heat to ethyl formate liquid and protective gas such as nitrogen etc, heat efficiency is high, can mix fully to protective gas and ethyl formate gas, good uniformity, the dosage and concentration of protective gas and ethyl formate are accurate. It includes protective gas bottle, ethyl formate bottle, mixing chamber, the protective gas bottle is communicated with the mixing chamber through the protective gas pipeline with flowmeter, heating and discharging one, the ethyl formate bottle is communicated with the mixing chamber through the ethyl formate pipeline with peristaltic pump, heating and discharging two, and the mixing chamber is connected with the mixed gas output pipe in communication.

Description

Technical Field

[0001] This utility model relates to equipment for fumigating grains, fruits, etc. to control storage pests, specifically a fumigation machine. Background Technology

[0002] CN107549299A discloses an ethyl formate dosing system and method for fruit fumigation. The ethyl formate vaporization unit includes a tank with a stainless steel inner wall. The tank has a liquid ethyl formate inlet, a nitrogen inlet, an ethyl formate gas outlet, and a residue discharge port. The nitrogen inlet is vertically oriented towards the bottom of the tank and is connected to the nitrogen outlet via a pipeline. The tank also has a PTC heating module for heating the liquid ethyl formate, located at the bottom of the tank. During operation, liquid ethyl formate is supplied from the liquid ethyl formate inlet into the stainless steel inner wall tank. The PTC heating module heats the liquid ethyl formate, causing it to vaporize. The vaporized ethyl formate gas, carried by nitrogen, enters the ethyl formate dilution and mixing release unit from the ethyl formate gas outlet. It then mixes and dilutes with air from the fumigation space of the container, and finally enters the fumigation space from the mixed gas outlet.

[0003] Its shortcomings are that the PTC heating module is located at the bottom of the tank, which has a low heating efficiency for liquid ethyl formate. At the same time, the vaporized ethyl formate gas mixes with nitrogen in the tank, resulting in poor mixing uniformity of ethyl formate gas and nitrogen gas and large concentration variations of ethyl formate gas and nitrogen gas. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a fumigation machine that addresses the shortcomings of the prior art. It can heat ethyl formate liquid and protective gas such as nitrogen, has high thermal efficiency, can fully mix the protective gas and ethyl formate gas with good uniformity, and accurately measure and concentrate the protective gas and ethyl formate.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A fumigation machine includes a protective gas cylinder, an ethyl formate cylinder, and a mixing chamber. The protective gas cylinder is connected to the mixing chamber via a protective gas pipeline having a flow meter and a heating outlet. The ethyl formate cylinder is connected to the mixing chamber via an ethyl formate pipeline having a peristaltic pump and a heating outlet. A mixed gas output pipe is connected to the mixing chamber.

[0007] The above-mentioned fumigation machine has heating elements one and two, which are composed of multiple straight pipes connected in sequence by U-shaped tubes, with an electric heating film wrapped around the outer periphery of the straight pipes.

[0008] The aforementioned fumigation machine also includes a solenoid valve connected in parallel with the flow meter on the protective gas pipeline.

[0009] The aforementioned fumigation machine also includes an electric heating belt wrapped around the outer periphery of the mixing chamber for heating the mixing chamber.

[0010] In the aforementioned fumigation machine, the bottoms of the protective gas cylinder and the ethyl formate cylinder are detachably connected to base plate one and base plate two, respectively. Base plate one and base plate two are vertically connected to frame one via linear bearings. Weight sensor one and weight sensor two are respectively installed between the bottom of base plate one and base plate two and frame one to detect the weight of base plate one and the protective gas cylinder, and base plate two and the ethyl formate cylinder, respectively. Heating array one, heating array two, peristaltic pump, and mixing chamber are all connected to frame two. The protective gas pipeline connecting the protective gas cylinder and heating array one, and the ethyl formate pipeline connecting the ethyl formate cylinder and the peristaltic pump are all flexible pipelines.

[0011] The fumigation machine described above has rollers installed at the bottom of both frame one and frame two.

[0012] The fumigation machine described above uses nitrogen, carbon dioxide, or an inert gas as the protective gas.

[0013] The beneficial effects of this utility model are as follows:

[0014] The protective gas, such as nitrogen, is mixed with ethyl formate gas in the mixing chamber and then output through the mixed gas output pipe. The protective gas and ethyl formate gas can be fully mixed in the mixing chamber, resulting in good uniformity.

[0015] The electric heating film is wrapped around the outer periphery of multiple straight tubes in heating array one and heating array two, and can fully exchange heat with the protective gas and ethyl formate. The electric heating film can heat the protective gas and ethyl formate with high efficiency and make full use of heat.

[0016] When the solenoid valve is open and the peristaltic pump is not operating, the entire pipeline and mixing chamber can be purged with protective gas alone to remove air and ensure the safe introduction of the protective gas and ethyl formate mixture. The solenoid valve is only open during purging and closed during other normal operating times. The flow meter monitors the protective gas usage in real time and controls the peristaltic pump speed accordingly, precisely controlling the ethyl formate dosage to ensure that the protective gas and ethyl formate are mixed in the set ratio.

[0017] The electric heating belt wrapped around the outer perimeter of the mixing chamber can provide additional heating when the temperature of the mixed gas inside the mixing chamber is low, ensuring that the ethyl formate inside the mixing chamber is always in a gaseous state, and can adapt to different working environments.

[0018] Weight sensor 1 and weight sensor 2 can detect the weight of protective gas cylinders, ethyl formate cylinders, etc., respectively. They can monitor the amount of protective gas and ethyl formate used in real time and prepare to replace the protective gas cylinders and ethyl formate cylinders before they run out.

[0019] In addition to nitrogen, the protective gas mentioned above can also be carbon dioxide or an inert gas. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the entire fumigation machine.

[0022] Figure 2 This is a schematic diagram of the structure of a nitrogen cylinder, an ethyl formate bottle, and a frame.

[0023] Figure 3 , Figure 4 These are all schematic diagrams of heating elements.

[0024] Figure 5 This is a schematic diagram of the second heating element.

[0025] Figure 6 This is a schematic diagram of the principle of this fumigation machine. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 The fumigation machine shown has a nitrogen cylinder 1 connected to a nitrogen pipe 31 on the mixing chamber 3 via a nitrogen pipeline connected in series with a pressure gauge, flow meter, and heating outlet 4. A solenoid valve is connected in parallel with the flow meter to the nitrogen pipeline. An ethyl formate cylinder 2 is connected to an ethyl formate pipe 32 on the mixing chamber 3 via an ethyl formate pipeline connected in series with a peristaltic pump 9 and heating outlet 14. A mixed gas output pipe 33 is also connected to the mixing chamber 3. During operation, the mixed gas output pipe 33 is connected to a sealed storage bin containing grain or fruit.

[0028] See Figure 3-5 Heating busbar 1 (4) and heating busbar 2 (14) are both composed of multiple straight tubes connected sequentially by U-shaped tubes, with an electric heating film wound around the outer periphery of the straight tubes. An electric heating strip is wound around the outer periphery of the mixing chamber 3.

[0029] See Figure 2 ,refer to Figure 6 The bottoms of nitrogen cylinder 1 and ethyl formate cylinder 2 are detachably connected to base plate 1 5 and base plate 2 15, respectively. The four corners of the bottom of base plate 1 5 and base plate 2 15 are vertically connected to frame 1 6 via four linear bearings 8. Weight sensor 1 7 and weight sensor 2 17 are respectively installed between the bottom center of base plate 1 5 and base plate 2 15 and frame 1 6, for detecting the weight of base plate 1 5 and nitrogen cylinder 1, and base plate 2 15 and ethyl formate cylinder 2, respectively.

[0030] A temperature sensor for detecting nitrogen temperature is installed on heating outlet 14 and nitrogen pipe 31, a temperature sensor for detecting ethyl formate temperature is installed on heating outlet 2 14 and ethyl formate pipe 32, and a temperature sensor for detecting mixed gas temperature is installed on mixing chamber 3.

[0031] The flow meter, solenoid valve, heating manifold 1 4, heating manifold 2 14, peristaltic pump 9, and mixing chamber 3 are all connected to frame 2 16; rollers 10 are installed at the bottom of frame 1 6 and frame 2 16.

[0032] The pressure gauge is installed on nitrogen cylinder 1. The nitrogen pipeline connecting the pressure gauge and the flow meter, and the ethyl formate pipeline connecting ethyl formate cylinder 2 and the peristaltic pump are all flexible pipelines.

[0033] All temperature sensors, peristaltic pump 9, weight sensor 1 7, weight sensor 2 17, flow meter, solenoid valve, electric heating diaphragm, electric heating belt, etc., are connected to the controller and operate under its control. The rotational speed of the peristaltic pump is determined based on the nitrogen flow rate measured by the flow meter.

[0034] The entire workflow is as follows: First, the pipeline is automatically purged. The solenoid valve opens, and nitrogen from the nitrogen cylinder purges the entire pipeline. Then, heating manifold 1 and heating manifold 2 are automatically preheated until their temperatures reach ≥70°C. At this point, the solenoid valve closes, the flow meter opens, and the peristaltic pump starts to introduce nitrogen and ethyl formate. The fumigation countdown begins at this time. When the fumigation time is up, the peristaltic pump and flow meter shut off.

[0035] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A fumigation machine, comprising a protective gas cylinder, an ethyl formate cylinder, and a mixing chamber, characterized in that, The protective gas cylinder is connected to the mixing chamber via a protective gas pipeline with a flow meter and a heating outlet. The ethyl formate cylinder is connected to the mixing chamber via an ethyl formate pipeline with a peristaltic pump and a heating outlet. A mixed gas output pipe is connected to the mixing chamber.

2. The fumigation machine according to claim 1, characterized in that, Heating busbar 1 and heating busbar 2 are both composed of multiple straight tubes connected sequentially by U-shaped tubes, with an electric heating film wrapped around the outer periphery of the straight tubes.

3. The fumigation machine according to claim 1, characterized in that, It also includes a solenoid valve connected in parallel with the flow meter to protect the gas pipeline.

4. The fumigation machine according to claim 1, characterized in that, It also includes an electric heating strip wound around the outer periphery of the mixing chamber for heating the mixing chamber.

5. The fumigation machine according to claim 1, characterized in that, The bottoms of the protective gas cylinder and the ethyl formate cylinder are detachably connected to base plate one and base plate two, respectively. Base plate one and base plate two are vertically connected to frame one via linear bearings. Weight sensor one and weight sensor two are respectively installed between the bottom of base plate one and base plate two and frame one to detect the weight of base plate one and the protective gas cylinder, and base plate two and the ethyl formate cylinder, respectively. Heating row one, heating row two, peristaltic pump, and mixing chamber are all connected to frame two. The protective gas pipeline connecting the protective gas cylinder and heating row one, and the ethyl formate pipeline connecting the ethyl formate cylinder and the peristaltic pump are all flexible pipelines.

6. The fumigation machine according to claim 1, characterized in that, Both frame one and frame two are equipped with rollers at the bottom.

7. The fumigation machine according to claim 1, characterized in that, The protective gas is nitrogen, carbon dioxide, or an inert gas.

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