Pest control device and system for production workshop line pipe

Abstract

The utility model discloses a pest control device and system for a production workshop line pipe, and belongs to the technical field of pest control. The nitrogen filling device comprises a plugging assembly and a nitrogen filling assembly, the plugging assembly comprises an expandable expansion and contraction piece, and the expansion and contraction piece is movably inserted into a connector of a wire pipe; the expansion and contraction piece has a contraction state and an expansion state, in the contraction state, the expansion and contraction piece is in clearance fit connection with the inner wall of the connector, and in the expansion state, the expansion and contraction piece is in interference fit connection with the inner wall of the connector; the nitrogen charging assembly comprises a nitrogen charging piece capable of being connected and disconnected, the nitrogen charging piece is arranged in the expansion and contraction piece in a penetrating mode and connected with the expansion and contraction piece in a sealed mode, and the nitrogen charging piece can supplement nitrogen into the line pipe so as to repel and kill pests. According to the utility model, the aim of killing insects in the pipeline can be fulfilled without transforming the existing line pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pest control, in particular to a pest control device and system for wire pipes in a production workshop. Background Art

[0002] Grain, flour, feed, and tobacco processing plants are all equipped with various wire pipes, various cables with sealed sheaths (protective sheaths for wires or cables made of plastic, metal, rubber, and rubber materials), pipes for central dust removal systems and pneumatic conveying systems, central air-conditioning return air ducts, etc. These wire pipes, sheaths, and pipes are fixedly installed in the internal space, walls, columns, ground, and floor of the production workshop in the form of overhead, floor, or underground. The above-mentioned systems are very likely to accumulate various dust, debris, and various fine granular wastes in the workshop for a long time. After long-term operation, a large amount of dust accumulates in the wire pipes and pipes, and various mites, fungi, bacteria, viruses, and insects are bred.

[0003] Publication number CN110476945B discloses a mechanical method for repelling pests inside wire pipes and pipelines in a production workshop. It is necessary to modify the workshop pipeline foundation and install air vents, and then fill high-concentration nitrogen into the sealed pipeline to achieve the purpose of repelling or killing pests.

[0004] The following problems exist when renovating the workshop pipeline foundation: ① Due to production factors or safety control requirements, most production workshop pipelines are difficult to achieve by punching, cutting or truncation, and a sealed airflow channel cannot be constructed; ② Most of the designed or easy-to-renovate pipelines are rigid pipelines. The required gas concentration can be reached after the equipment is started for a period of time. After the equipment is shut down, the gas concentration in the pipeline is difficult to maintain due to the pressure inside and outside the pipeline; ③ The existing technology only proposes one-way mechanical expulsion, and the gas concentration in the pipeline decreases slowly and with low efficiency. Utility Model Content

[0005] In view of this, it is necessary to provide a pest control device and system for wire pipes in a production workshop to solve the problem of needing to modify the pipeline when performing pest control on the existing wire pipes.

[0006] In a first aspect, the utility model provides a pest control device and system for a production workshop wire pipe, comprising:

[0007] A plugging component, the plugging component comprising an expandable expansion and contraction component, the expansion and contraction component being movably inserted into the interface of the wire tube; the expansion and contraction component has a contracted state and an expanded state, in the contracted state, the expansion and contraction component is connected with the inner wall of the interface by a clearance fit, and in the expanded state, the expansion and contraction component is connected with the inner wall of the interface by an interference fit, so as to seal the interface;

[0008] A nitrogen filling component includes a nitrogen filling part that can be turned on and off. The nitrogen filling part is inserted into the expansion and contraction part and is sealed with the expansion and contraction part. The nitrogen filling part can add nitrogen to the wire pipe to drive away and kill insects.

[0009] Furthermore, the expansion and contraction member extends at least 3 cm along the length direction of the interface.

[0010] Furthermore, in the contracted state, the cross-sectional shape of the expansion and contraction member is consistent with the cross-sectional shape of the interface.

[0011] Furthermore, the blocking assembly also includes a medium charging and discharging unit, which includes a charging and discharging joint and a medium delivery pipe integrally connected to the expansion and contraction part. The medium delivery pipe is detachably connected to the charging and discharging joint. The medium delivery pipe can charge and discharge medium into the expansion and contraction part through the charging and discharging joint to drive the expansion and contraction part to expand or contract.

[0012] Furthermore, a pressure monitor for detecting medium pressure is provided on the medium delivery pipe.

[0013] In the second aspect, the utility model provides a pest control system for wire pipes in a production workshop, including a pest control device for wire pipes in a production workshop, a nitrogen generator and a gas replenishing unit, wherein a plurality of the expansion and contraction parts are respectively connected one-to-one with a plurality of interfaces of the wire pipe, at least one of the nitrogen charging parts is connected to the nitrogen generator, and at least one of the nitrogen charging parts is connected to the gas replenishing unit, and the gas replenishing unit can automatically replenish nitrogen into the wire pipe.

[0014] Furthermore, it also includes a gas concentration detection component, which includes a gas detector for detecting gas concentration, and a plurality of the gas detectors are dispersedly installed on the wire pipe and arranged on the gas replenishment unit.

[0015] Furthermore, the wire pipe includes a main pipe and multiple branch pipes, one end of the branch pipe is connected to the main pipe, and the other end of the branch pipe is connected to an independent chamber of the warehouse; the two gas replenishing units are respectively connected to two nitrogen filling parts, and the nitrogen generator is respectively connected to the two gas replenishing units through pipelines. The nitrogen generator can absorb the gas in the wire pipe, separate the nitrogen, and then re-transport it to the wire pipe.

[0016] Furthermore, a dust cover is provided on the interface of the branch pipe.

[0017] Furthermore, the gas replenishing unit includes an air storage bag, and the volume of the air storage bag is not less than 60% of the total volume of the wire tube.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The utility model discloses a pest control device and system for a production workshop wire pipe, which is provided with a plugging component, and the plugging component includes an expansion and contraction component, the volume of which can be expanded and contracted, and the expansion and contraction component is movably inserted into the interface of the wire pipe. The expansion and contraction component has a contracted state and an expanded state. In the contracted state, the expansion and contraction component is connected with the inner wall of the interface by a clearance fit, and the expansion and contraction component can be disassembled and assembled with the interface as needed. In the expanded state, the expansion and contraction component is connected with the inner wall of the interface by an interference fit, so that the expansion and contraction component and the interface are sealed to prevent leakage of gas inside the wire pipe. With the help of the expansion and contraction component, the plugging component can be directly matched and sealed with the existing wire pipe, without the need to modify the wire pipe, and has high sealing performance, which can better kill pests in the wire pipe.

[0020] (2) The utility model provides a pest control device and system for a production workshop wire pipe, which is provided with a nitrogen filling component, which includes a nitrogen filling part, which is inserted into the expansion and contraction part, and the middle part of the nitrogen filling part is sealed and connected to the expansion and contraction part, so as to avoid gas leakage between the nitrogen filling part and the expansion and contraction part. The nitrogen filling part is hollow inside to form a channel, and the nitrogen filling part can control the opening and closing of the channel, so as to replenish nitrogen from the outside to the wire pipe, discharge oxygen in the wire pipe, maintain a low oxygen or even anaerobic environment, and thus kill pests.

[0021] (3) The utility model provides a pest control device and system for a production workshop wire pipe, wherein a plurality of expansion and contraction parts are respectively connected to a plurality of interfaces of the wire pipe in a one-to-one correspondence, so that a sealed space isolated from the outside is formed inside the wire pipe, and at least one nitrogen filling part is connected to a nitrogen generator, which can supply nitrogen to the inside of the wire pipe to reduce the oxygen content, thereby repelling pests. At least one nitrogen filling part is connected to a gas replenishment unit, which can store nitrogen and slowly release it into the wire pipe to maintain the nitrogen concentration in the wire pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of the pest control device provided by the utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure between the pest control device and the interface in the utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the connection structure between the pest control device and the interface in the utility model. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the pest control system in the utility model. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the pest control system in the utility model. Figure 2 .

[0028] In the figure, 100-blocking assembly, 110-expansion and contraction member, 120-medium charging and discharging unit, 121-charging and discharging joint, 122-medium delivery pipe, 123-pressure monitor;

[0029] 200-nitrogen charging assembly, 210-nitrogen charging part, 211-valve;

[0030] 300-Nitrogen generator;

[0031] 400-Gas replenishment unit;

[0032] 500-wire pipe, 510-main pipe, 520-branch pipe, 530-interface, 540-dust cover. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0034] In this embodiment, a pest control device and system for a production workshop wire pipe relate to the field of pest control technology. An expansion and contraction member 110 is installed at each existing interface 530 of the wire pipe 500. The expansion and contraction member 110 can form a stable seal at the interface 530 and can be easily removed. The purpose of killing insects inside the pipeline can be achieved without modifying the existing wire pipe 500. As a preferred application, during the storage process of tobacco leaves, the device and system can have a good killing effect on tobacco insects in the wire pipe 500, thereby optimizing the storage environment of tobacco leaves.

[0035] See also Figures 1 to 3 In this embodiment, a pest control device for a production workshop wire pipe includes: a plugging component 100 and a nitrogen filling component 200. The plugging component 100 can seal the interface 530 of the wire pipe 500 without modifying the wire pipe 500. The nitrogen filling component 200 can be used in conjunction with the plugging component 100 to flush nitrogen into the wire pipe 500 to drive away pests.

[0036] The plugging assembly 100 includes an expansion and contraction member 110, the volume of which can expand and contract, and the expansion and contraction member 110 is movably inserted into the interface 530 of the wire tube 500. The expansion and contraction member 110 has a contracted state and an expanded state. In the contracted state, the expansion and contraction member 110 is connected with the inner wall of the interface 530 by a clearance fit, and the expansion and contraction member 110 can be disassembled and assembled with the interface 530 as needed. In the expanded state, the expansion and contraction member 110 is connected with the inner wall of the interface 530 by an interference fit, so as to achieve the sealing of the expansion and contraction member 110 and the interface 530 and prevent the leakage of the gas inside the wire tube 500. With the help of the expansion and contraction member 110, the plugging assembly 100 can be directly matched and sealed with the existing wire tube 500, without the need to modify the wire tube 500, and has high sealing performance, which can better kill and drive away pests in the wire tube 500.

[0037] The nitrogen filling assembly 200 includes a nitrogen filling member 210, which is inserted into the expansion and contraction member 110. The middle part of the nitrogen filling member 210 is sealed and connected to the expansion and contraction member 110, so as to avoid gas leakage between the nitrogen filling member 210 and the expansion and contraction member 110. The nitrogen filling member 210 can control the opening and closing of the channel, and can replenish nitrogen from the outside to the wire tube 500, discharge oxygen in the wire tube 500, maintain a low oxygen or even anaerobic environment, and thus drive away pests.

[0038] In some embodiments, see Figure 2 , the expansion and contraction piece 110 extends at least 3 cm along the length direction of the interface 530, and the outer side of the expansion and contraction piece 110 forms an annular abutting surface with the inner wall of the interface 530. The longer the abutting surface is, the higher the sealing degree between the expansion and contraction piece 110 and the interface 530 is. The expansion and contraction piece 110 is inserted into the interface 530 as a whole, and the distance of the expansion and contraction piece 110 along the length direction of the interface 530 is the length of the abutting surface. The longer the length of the expansion and contraction piece 110 along the interface 530 is, the higher the sealing degree between the expansion and contraction piece 110 and the interface 530 is. However, the longer the length of the expansion and contraction piece 110 along the interface 530 is, the larger the volume and weight of the expansion and contraction piece 110 is, and the higher the cost is. At the same time, when the length of the expansion and contraction member 110 along the interface 530 is too short and the length of the abutment surface is too short, the effective area of ​​the expansion and contraction member 110 and the interface 530 will be too small, the connection strength between the expansion and contraction member 110 and the interface 530 will be too weak, and the expansion and contraction member 110 will easily shake and vibrate relative to the interface 530, interfering with the seal and connection between the expansion and contraction member 110 and the interface 530. After comprehensive consideration of stability experiments and costs, the comprehensive utility of the abutment surface length greater than 3 cm is higher.

[0039] In some embodiments, see 1 and Figure 2In the contracted state, the cross-sectional shape of the expansion and contraction member 110 is consistent with the cross-sectional shape of the interface 530. The cross-sectional shape of the interface 530 can be circular or square, and the cross-sectional shape of the expansion and contraction member 110 in the contracted state is consistent with the interface 530, and is also circular or square. The outer side of the expansion and contraction member 110 and the inner wall of the interface 530 maintain the same interval, and the expansion and contraction member 110 can expand outward uniformly relative to its own midline to fill the interval, so that the pressure of the expansion and contraction member 110 is consistent at all locations, and has the same degree of sealing.

[0040] As a further embodiment, an annular cavity is provided inside the expansion and contraction member 110, and the cavity is arranged around the nitrogen filling member 210. By filling the medium into the cavity, the expansion of the expansion and contraction member 110 can be promoted, so that the expansion and contraction member 110 enters an expanded state, and the expansion and contraction member 110 and the interface 530 are sealed to prevent leakage of gas inside the wire tube 500. By releasing the medium in the cavity, the expansion and contraction member 110 can be promoted to shrink, so that the expansion and contraction member 110 enters a contracted state, and the expansion and contraction member 110 and the inner wall of the interface 530 are separated from each other to form a gap, so that the expansion and contraction member 110 can be easily pulled out of the interface 530. The expansion and contraction member 110 is made of elastic rubber material as a whole, has extremely strong elasticity, and can expand and shrink as needed within a certain limit.

[0041] In some embodiments, see Figure 2 The plugging assembly 100 further includes a medium charging and discharging unit 120, which includes a charging and discharging joint 121 and a medium delivery pipe 122. The charging and discharging joint 121 is integrally connected with the expansion and contraction member 110, and can control the charging and discharging of the medium inside the expansion and contraction member 110. The medium delivery pipe 122 is detachably connected to the charging and discharging joint 121, and the medium delivery pipe 122 can charge and discharge the medium into the expansion and contraction member 110 with the help of the charging and discharging joint 121. The increase or decrease of the medium in the annular cavity of the expansion and contraction member 110 directly controls the expansion and contraction of the expansion and contraction member 110.

[0042] It should be noted that the medium can be liquid or gas, the liquid can be water, oil, etc., and the gas is generally compressed air, and the corresponding effects can be achieved.

[0043] In a further embodiment, a pressure monitor 123 is provided on the medium delivery pipe 122. The pressure monitor 123 can monitor the pressure of the medium in real time so that the medium pressure is always maintained within a reasonable range, thereby preventing the expansion and contraction component 110 from contracting due to a drop in medium pressure and destroying the seal between the expansion and contraction component 110 and the interface 530.

[0044] In some embodiments, see Figure 1 and Figure 2The nitrogen charging member 210 is provided with a valve 211, which can control the on and off of the gas. When the valve 211 is opened, the two ends of the nitrogen charging member 210 are connected to the wire pipe 500 and the outside respectively. When the gas pressure outside is greater than that inside the wire pipe 500, the wire pipe 500 can be pressurized and inflated. When the gas pressure outside is less than that inside the wire pipe 500, the high-concentration nitrogen in the wire pipe 500 can be discharged through the nitrogen charging member 210.

[0045] In the specific implementation process, the nitrogen filling member 210 is a cylindrical tube body, and the valve 211 is arranged in the middle of the cylindrical tube body, which can control the opening and closing of the inner cavity of the cylindrical tube body. The outer cylindrical surface of the cylindrical tube body is sealed and connected to the expansion and contraction member 110 as a whole, which can avoid the phenomenon of air leakage between the two. In general, the cylindrical tube body is fixedly connected to the expansion and contraction member 110 by an adhesive.

[0046] See also Figure 4 and Figure 5 A pest control system for a production workshop wire pipe includes a pest control device for a production workshop wire pipe, a nitrogen generator 300 and a gas replenishment unit 400. A plurality of expansion and contraction parts 110 are respectively connected to a plurality of interfaces 530 of a wire pipe 500 in a one-to-one correspondence, so that a sealed space isolated from the outside is formed inside the wire pipe 500. At least one nitrogen filling part 210 is connected to the nitrogen generator 300. The nitrogen generator 300 can supply nitrogen to the inside of the wire pipe 500 to reduce the oxygen content, thereby repelling pests. At least one nitrogen filling part 210 is connected to the gas replenishment unit 400. The gas replenishment unit 400 can store nitrogen and slowly release it into the wire pipe 500 to maintain the nitrogen concentration in the wire pipe 500.

[0047] In some embodiments, the pest control system for the production workshop wire pipe also includes a gas concentration detection component, which includes a gas detector, and the gas detector can detect the concentration of nitrogen, oxygen or carbon dioxide in the gas. In the specific implementation process, holes can be drilled in various areas of the wire pipe 500, and the gas detection component can be inserted into the wire pipe 500 and sealed to complete the monitoring of the nitrogen or oxygen concentration in various parts of the wire pipe 500.

[0048] In some embodiments, see 5, the line pipe 500 includes a main pipe 510 and a plurality of branch pipes 520, one end of the branch pipe 520 is connected to the main pipe 510, and the other end of the branch pipe 520 leads to each independent chamber of the warehouse, and the expansion and contraction member 110 is installed at both ends of the main pipe 510 and one end of the branch pipe 520 connected to the chamber to form a sealed pipeline space. The two gas replenishment units 400 are respectively connected to the two nitrogen filling parts 210, and the nitrogen generator 300 is respectively connected to the two gas replenishment units 400 through pipelines, and the nitrogen generator 300, the gas replenishment unit 400 and the line pipe 500 form a ring-shaped airflow passage. Valves are provided at both ends of the gas replenishment unit 400, and the valves can control the on and off of the gas flow. When it is necessary to replenish gas into the line pipe 500, the nitrogen generator 300 extracts nitrogen-rich gas from the line pipe 500 and re-inputs pure nitrogen into the line pipe 500 after separating the oxygen. Compared with directly using the outside air with an oxygen concentration of 21%, the nitrogen generator 300 has less difficulty in separating oxygen from the nitrogen-rich gas and consumes less energy.

[0049] It should be noted that a dust cover 540 is provided at the interface 530 between the main pipe 510 and the branch pipe 520 , and the dust cover 540 can prevent dust from entering the interior of the pipe.

[0050] As a further embodiment, the gas replenishment unit 400 includes an air storage bag, the volume of which is not less than 60% of the total volume of the line tube 500. After the nitrogen generator 300 stops, the line tube 500 cannot be kept absolutely sealed, and the gas in the line tube 500 slowly exchanges gas with the outside. The air storage bag 400 can play a positive role and replenish nitrogen into the line tube 500 under the action of atmospheric pressure. In the specific implementation process, the air storage bag is made of elastic rubber or plastic. Filling the air storage bag with nitrogen can make the air storage bag pressurized and expanded. When gas leakage occurs in the line tube 500, nitrogen is automatically replenished into the air storage bag.

[0051] As another embodiment, the gas replenishing unit 400 includes a tank body that can store nitrogen. The tank body is filled with nitrogen under the action of a nitrogen generator, and the gas pressure is greater than the nitrogen pressure in the wire pipe 500. An electromagnetic valve is provided between the tank body and the wire pipe 500, which can intermittently control the connection between the tank body and the wire pipe 500, continuously replenish nitrogen into the wire pipe 500, and maintain the concentration of nitrogen in the wire pipe 500.

[0052] Experiments show that when the nitrogen generator 300 is started at intervals of 12 hours, the gas volume in the gas replenishment unit 400 is not less than 45% of the total volume inside the wire tube 500, and the nitrogen inside the wire tube 500 can always be maintained at more than 98%, meeting the requirements of insecticide. When the nitrogen generator 300 is started at intervals of 24 hours, the gas volume in the gas replenishment unit 400 is not less than 60% of the total volume inside the wire tube 500, and the nitrogen inside the wire tube 500 can always be maintained at more than 98%, meeting the requirements of insecticide. The startup frequency of the nitrogen generator 300 can be set manually, generally not more than 24 hours. The volume of the gas replenishment unit 400 is not less than 60% of the total volume of the wire tube 500, which can meet the needs of most situations.

[0053] In some embodiments, the pest control system of the production workshop wire pipe also includes a control component, which includes a controller. The controller is electrically connected to the gas detector and the nitrogen generator 300 respectively. When the gas detector detects that the nitrogen content or oxygen content inside the wire pipe 500 reaches a certain limit, the nitrogen generator 300 is started or shut down to achieve intermittent operation of the nitrogen generator 300, which can save electricity and reduce storage costs.

[0054] It should be noted that:

[0055] ① Under 2% O2 concentration, the activity of tobacco beetles will be inhibited. After about 30 minutes, the insects will show no signs of activity. They will not react very clearly to changes in light, air flow, air stillness and other conditions. There will be no obvious signs of activity after reoxygenation.

[0056] ② Under the condition of 5% O2 concentration, the activity of tobacco beetles will be inhibited. When the gas in the pipeline is kept static, the tobacco beetles tend to move towards the gas flow, light and lure, but the duration is short, about 120 minutes; when the gas flow in the pipeline continues, the activity of tobacco beetles is gradually inhibited.

[0057] ③ Under the condition of 8%-21% O2 concentration, the activity of tobacco beetles was not affected. When the gas inside the pipe was kept still, tobacco beetles showed phototropism and a tendency to move towards the lure. Under the condition of 8% O2 concentration and gas flow, the behavior of tobacco beetles was disturbed and showed an irregular movement trend.

[0058] Therefore, when the oxygen concentration is 5%, tobacco beetles will move in the direction of air flow, and air flow will interfere with the characteristics of tobacco beetles in phototropism and movement toward attractants. Only when the oxygen concentration of nitrogen-filled insecticide in the workshop pipeline is below 2% and maintained for 12 days can all tobacco beetles be killed.

[0059] It should be noted that the nitrogen generator 300 is specifically a gas component separation device, which compresses the air at a high density and then uses the different condensation points of the various components in the air to separate the gas and liquid at a certain temperature, and then distills it to separate it into oxygen and nitrogen, and retains the enriched nitrogen and outputs it.

[0060] A one-way nitrogen filling method for the line pipe 500, such as Figure 4 As shown:

[0061] (1) The two gas replenishing units 400 are respectively connected to the nitrogen filling component 210 at the terminal end / end of the wire pipe 500 through pipelines, and a nitrogen generator 300 is connected to a gas replenishing unit 400 through a pipeline. The nitrogen generator 300 delivers nitrogen to the front end of the wire pipe 500. The rear end of the wire pipe 500 is opened, and the air inside the wire pipe 500 is discharged to the outside through the other gas replenishing unit 400.

[0062] (2) When the oxygen concentration in the terminal gas replenishment unit 400 is less than 2% of the nitrogen filling set value, the nitrogen concentration in the line pipe 500 will reach the set value, the nitrogen generator 300 will be shut down, and the nitrogen concentration will be maintained within the set value range.

[0063] (3) After the nitrogen generator 300 is shut down, the valves 211 of the gas replenishing units 400 located at the front and rear ends of the line pipe 500 are closed, cutting off the connection between the two gas replenishing units 400 and the outside world. The two gas replenishing units 400 filled with nitrogen are simultaneously connected to the sealed space of the line pipe 500. The gas replenishing units 400 can automatically replenish the nitrogen inside the line pipe 500 as the air pressure inside the line pipe 500 decreases.

[0064] (4) After the nitrogen in the wire pipe 500 is maintained for 12 days, the oxygen content in the wire pipe 500 exceeds 2%, and the nitrogen generator 300 is restarted. The nitrogen generator 300 inhales fresh air from the outside, separates the oxygen in the air, inputs pure nitrogen into the wire pipe 500, and discharges the gas with an oxygen content exceeding 2% in the wire pipe 500.

[0065] (5) The fresh air system of the nitrogen generator 300 is turned on to fill air into the wire pipe 500 until the oxygen concentration in the wire pipe 500 returns to the atmospheric level. In order to prevent nitrogen-enriched air from causing harm to people and animals, the nitrogen inside the wire pipe 500 is discharged to the outdoor open environment through a pipeline.

[0066] The circulating nitrogen filling method of the line pipe 500 is as follows: Figure 5 As shown:

[0067] (1) The two gas replenishment units 400 are respectively connected to the nitrogen filling member 210 at the terminal / end of the line pipe 500 through pipelines, and a nitrogen generator 300 is connected to a gas replenishment unit 400 through a pipeline. The nitrogen generator 300 delivers nitrogen to the front end of the line pipe 500. The rear end of the line pipe 500 is opened, and the air inside the line pipe 500 is discharged to the outside through the other gas replenishment unit 400. The other gas replenishment unit 400 is connected to the nitrogen generator 300 through a pipeline. The nitrogen generator 300 can absorb air from the atmosphere or gas from the line pipe 500.

[0068] (2) When the oxygen concentration in the terminal gas replenishment unit 400 is less than 2% of the nitrogen filling set value, the nitrogen concentration in the line pipe 500 will reach the set value, the nitrogen generator 300 will be shut down, and the nitrogen concentration will be maintained within the set value range.

[0069] (3) After the nitrogen generator 300 is shut down, the valves 211 of the gas replenishing units 400 located at the front and rear ends of the line pipe 500 are closed, cutting off the connection between the two gas replenishing units 400 and the outside world. The two gas replenishing units 400 filled with nitrogen are simultaneously connected to the sealed space of the line pipe 500. The gas replenishing units 400 can automatically replenish the nitrogen inside the line pipe 500 as the air pressure inside the line pipe 500 decreases.

[0070] (4) After the nitrogen in the line pipe 500 is maintained for 12 days, the oxygen content in the line pipe 500 exceeds 2%, and the nitrogen generator 300 is restarted. The nitrogen generator 300 absorbs nitrogen-rich gas from the inside of the line pipe 500 through the pipeline and separates oxygen from the nitrogen-rich gas. The oxygen concentration in the nitrogen-rich gas is only slightly higher than 2%. Compared with air with an oxygen concentration of 21%, the nitrogen generator 300 has less difficulty in separating oxygen from the nitrogen-rich gas and consumes less energy.

[0071] (5) The fresh air system of the nitrogen generator 300 is turned on to fill air into the wire pipe 500 until the oxygen concentration in the wire pipe 500 returns to the atmospheric level. In order to prevent nitrogen-enriched air from causing harm to people and animals, the nitrogen inside the wire pipe 500 is discharged to the outdoor open environment through a pipeline.

[0072] An oxygen detector and a pressure sensor are installed on the air inlet duct of the nitrogen generator 300. When the oxygen concentration in the air inlet duct is lower than the nitrogen charging set value by 2%, the nitrogen generating equipment automatically shuts down.

[0073] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A pest control device for a production workshop wire pipe, characterized in that: include: A plugging assembly, the plugging assembly comprising an expandable expansion and contraction member, the expansion and contraction member being movably inserted into an interface of the wire tube; The expansion and contraction member has a contracted state and an expanded state. In the contracted state, the expansion and contraction member is connected with the inner wall of the interface by clearance fit. In the expanded state, the expansion and contraction member is connected with the inner wall of the interface by interference fit to seal the interface. A nitrogen filling component includes a nitrogen filling part that can be turned on and off. The nitrogen filling part is inserted into the expansion and contraction part and is sealed with the expansion and contraction part. The nitrogen filling part can add nitrogen to the wire pipe to drive away and kill insects.

2. A pest control device for a production workshop wire pipe according to claim 1, characterized in that: The expansion and contraction member extends at least 3 cm along the length direction of the interface.

3. A pest control device for a production workshop wire pipe according to claim 1 or 2, characterized in that: In the contracted state, the cross-sectional shape of the expansion and contraction member is consistent with the cross-sectional shape of the interface.

4. The pest control device for wire pipes in a production workshop according to claim 1, characterized in that: The plugging assembly also includes a medium charging and discharging unit, which includes a charging and discharging joint and a medium delivery pipe that are integrally connected to the expansion and contraction part. The medium delivery pipe is detachably connected to the charging and discharging joint. The medium delivery pipe can charge and discharge medium into the expansion and contraction part through the charging and discharging joint to drive the expansion and contraction part to expand or contract.

5. The pest control device for wire pipes in a production workshop according to claim 4, characterized in that: The medium delivery pipe is provided with a pressure monitor for detecting the medium pressure.

6. A pest control system for wire pipes in a production workshop, characterized in that: It comprises a pest control device for a production workshop wire pipe as described in any one of claims 1 to 5, a nitrogen generator and a gas replenishing unit, a plurality of the expansion and contraction parts are respectively connected one-to-one with a plurality of interfaces of the wire pipe, at least one of the nitrogen charging parts is connected to the nitrogen generator, at least one of the nitrogen charging parts is connected to the gas replenishing unit, and the gas replenishing unit can automatically replenish nitrogen into the wire pipe.

7. A pest control system for wire pipes in a production workshop according to claim 6, characterized in that: It also includes a gas concentration detection component, which includes a gas detector for detecting gas concentration. A plurality of the gas detectors are dispersedly installed on the wire pipe and arranged on the gas replenishment unit.

8. A pest control system for wire pipes in a production workshop according to claim 7, characterized in that: The wire pipe includes a main pipe and multiple branch pipes, one end of the branch pipe is connected to the main pipe, and the other end of the branch pipe is connected to an independent chamber of the warehouse; the two gas replenishing units are respectively connected to the two nitrogen filling parts, and the nitrogen generator is respectively connected to the two gas replenishing units through pipelines. The nitrogen generator can absorb the gas in the wire pipe, separate the nitrogen, and then re-transport it to the wire pipe.

9. A pest control system for wire pipes in a production workshop according to claim 8, characterized in that: A dust cover is provided on the interface of the branch pipe.

10. A pest control system for wire pipes in a production workshop according to any one of claims 6 to 9, characterized in that: The volume of the gas supplement unit is not less than 60% of the total volume of the line pipe.

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