Sealed packaging device for insecticide

Abstract

The invention relates to the technical field of pesticide packaging devices, in particular to a sealed packaging device for pesticides, which comprises a barrel body, a liquid pumping barrel is arranged at the upper end of the inner side of the barrel body, a piston plate is slidably connected to the inner side of the liquid pumping barrel, and a liquid outlet pipe extending to the outside of the barrel body is fixed to the upper side of the piston plate. A pipe opening blocking mechanism is arranged between the liquid outlet pipe and the liquid pumping barrel, and two pressure balancing mechanisms used for balancing the pressure of the inner side of the barrel body are arranged in the barrel body. Through the pipe orifice plugging mechanism, the liquid pumping cylinder and the barrel body are communicated with the outside only when the pesticide needs to be pumped, and when the pesticide does not need to be pumped, the liquid outlet pipe moves upwards to be located at the highest point, and the flow channel is not communicated with the liquid outlet pipe, so that the liquid pumping cylinder and the interior of the barrel body are always isolated from the outside; therefore, external air can be well prevented from permeating into the inner side of the barrel body during long-time storage, and the storage time of the insecticide in the barrel body is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of insecticide packaging devices, and in particular to a sealed packaging device for insecticides. Background Art

[0002] Pesticides are mainly used to control agricultural pests and urban pests. They have a long history of use, large dosage, and a wide variety of varieties. In modern farms, a large amount of pesticides needs to be purchased at one time. In order to prevent the pesticides from reacting and volatilizing with oxygen in the air, the pesticides need to be sealed and stored.

[0003] After searching, a Chinese patent with publication number: CN107499637B discloses a packaging device for facilitating the use of pesticides and preventing leakage, including a storage box body, a liquid outlet is provided on the surface of the storage box body, a bottle cap is provided at the liquid outlet, the liquid outlet and the bottle cap are connected by threads, and a splash-proof slow-flow plate is provided below the liquid outlet, the splash-proof slow-flow plate includes a horizontally arranged liquid flow plate, and two slow-flow plates are respectively connected to the two sides of the liquid flow plate.

[0004] Based on the above search and combined with actual problems, it is found that the existing devices for packaging pesticides are usually a barrel body plus a sealing cover structure, which has a relatively simple structure and a single function. After opening the sealing cover multiple times to extract the pesticide, the pesticide in the barrel will be in contact with oxygen in the outside air multiple times, thereby shortening the shelf life of the pesticide. In addition, as the temperature difference between day and night changes, the air pressure inside and outside the barrel will change. If the air pressure in the barrel is too high, the gas generated by the volatilization of the internal pesticide components will be emitted outward, which can easily lead to a decrease in the concentration of the pesticide and reduce the quality of the pesticide. Summary of the invention

[0005] The object of the present invention is to provide a sealed packaging device for pesticides to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a sealed packaging device for insecticides, comprising a barrel body, a liquid pumping cylinder is arranged at the inner upper end of the barrel body, a piston plate is slidably connected to the inner side of the liquid pumping cylinder, a liquid outlet pipe extending to the outside of the barrel body is fixed on the upper side of the piston plate, a pipe mouth blocking mechanism is arranged between the liquid outlet pipe and the liquid pumping cylinder, and two pressure balancing mechanisms for balancing the pressure inside the barrel body are arranged inside the barrel body; the pipe mouth blocking mechanism comprises two guide groove plates fixed on the inner side of the liquid pumping cylinder and a cylindrical shell arranged at the middle section of the liquid outlet pipe, a rotating block is rotatably connected to the inner side of the cylindrical shell, a flow channel is opened inside the rotating block, and a gear is fixed to one end of the rotating block, a rack meshing with the gear is movably arranged on the outer side of the cylindrical shell, and the two ends of the rack are movably connected to the guide groove structure inside the two guide groove plates.

[0007] Preferably, the guide groove structure includes an upper straight groove, an oblique groove, and a lower straight groove opened inside the guide groove plate, the upper straight groove, oblique groove, and lower straight groove are arranged in sequence from top to bottom, and the upper straight groove, oblique groove, and lower straight groove are smoothly connected end to end, and two sliding pins are rotatably connected to both ends of the rack, and the two sliding pins are respectively slidably connected to the inner sides of the upper straight groove, oblique groove, and lower straight groove at corresponding positions.

[0008] Preferably, a rack guide block is fixed to the outer side of the cylindrical shell, a rack guide groove is provided inside the rack, and the rack guide block is slidably connected to the inner side of the rack guide groove.

[0009] Preferably, the lower end of the liquid suction cylinder is connected to a liquid suction extension tube extending to the bottom of the barrel body, and a plurality of liquid inlet holes are provided on the outer side of the liquid suction extension tube at the lower end position, and one-way valves are provided inside the liquid inlet holes and the liquid outlet tubes, and the conduction directions of the one-way valves inside the liquid inlet holes and the liquid outlet tubes both point to the upper end direction of the liquid outlet tube, and a filling tube is inserted on the outer side of the barrel body.

[0010] Preferably, a connecting hole for connecting the liquid outlet pipe with the interior of the liquid pumping cylinder is opened at the center of the piston plate, and the interior of the cylindrical shell is connected with the interior of the liquid outlet pipe.

[0011] Preferably, two permanent magnets are installed at both ends of the outer side of the cylindrical shell, and two annular grooves are opened at the two end positions of the flow channel inside the rotating block, and the inner sides of the two annular grooves are slidably connected with iron rings, and one end of the two iron rings is connected to a second sealing ring that can contact the inner side of the cylindrical shell, and the two iron rings are elastically connected to one end of the inner side of the two annular grooves through a disc spring.

[0012] Preferably, a push-pull sleeve is fixed at the center position on the upper side of the piston plate, the liquid outlet pipe is elastically connected to the upper end of the push-pull sleeve through a first spring, and the outer lower end of the liquid outlet pipe is sleeved with a first sealing ring slidably connected to the inner side of the push-pull sleeve.

[0013] Preferably, the pressure balancing mechanism includes an air cylinder arranged inside the barrel body, the inner side of the air cylinder is slidably connected with an air cylinder piston, the lower end of the air cylinder piston is elastically connected to the inner lower end of the air cylinder through an air cylinder spring, a two-way conduction mechanism is provided between the interior of the air cylinder and the interior of the barrel body, and nitrogen that does not react with the pesticide is stored in the space above the air cylinder piston inside the air cylinder.

[0014] Preferably, the two-way conducting mechanism includes a reversing tube arranged on the outside of the barrel body, both ends of the reversing tube are connected with the interior of the barrel body and the air cylinder respectively through connecting tubes, and a movable valve core is movably arranged at the middle position on the inner side of the reversing tube, both ends of the movable valve core are elastically connected to the inner side of the reversing tube through two return springs, and the first valve core flow channel and the second valve core flow channel are respectively opened at the two ends of the interior of the movable valve core, and the first tube wall flow channel and the second tube wall flow channel which can be connected with the first valve core flow channel and the second valve core flow channel respectively are opened on both sides of the interior of the reversing tube.

[0015] Preferably, the lower end of the air storage cylinder is connected to an external air pipe extending to the outside of the barrel body.

[0016] The present invention provides a sealed packaging device for insecticides by improvement, which has the following improvements and advantages compared with the prior art:

[0017] First, the present invention draws the insecticide in the barrel body into the liquid extraction cylinder by moving the liquid outlet pipe and the piston plate up and down, and then presses the insecticide in the liquid extraction cylinder outward. Compared with the existing storage barrel with a sealing cover, the device does not need to open the sealing cover each time the insecticide is taken out, so that the outside air will not be introduced into the inside of the barrel body, thereby greatly delaying the deterioration period of the insecticide and extending the shelf life of the insecticide. At the same time, through the pipe mouth sealing mechanism therein, the liquid extraction cylinder and the barrel body are connected to the outside world only when the insecticide needs to be extracted. When no extraction is done, the liquid outlet pipe moves up to the highest point, and the flow channel is not connected to the liquid outlet pipe, thereby ensuring that the liquid extraction cylinder and the inside of the barrel body are always isolated from the outside world, thereby preventing the outside air from penetrating into the inside of the barrel body during long-term storage, and greatly extending the shelf life of the insecticide inside the barrel body.

[0018] Secondly, the present invention uses two pressure balancing mechanisms. When the liquid level of the pesticide in the barrel body decreases, the air pressure in the barrel body decreases. At this time, nitrogen that does not react with the pesticide can be filled into the inner side of the barrel body. Compared with the existing pesticide packaging device, it can prevent outside air from entering the interior of the barrel body, reduce the contact between the pesticide and oxygen in the air, thereby further preventing the pesticide from deteriorating and further extending the storage time of the pesticide. In addition, with the change of ambient temperature, under the action of thermal expansion and contraction, the internal temperature of the barrel body is higher than the external temperature, or when the pesticide is added to the barrel body, the air pressure inside the barrel body will increase. The pressure balancing mechanism can introduce the high-pressure nitrogen inside the barrel body and the volatile gas in the pesticide into the inner side of the gas storage cylinder, which can prevent the volatile gas of the pesticide inside the barrel body from emitting outward, thereby preventing the concentration of the pesticide from being reduced due to the influence of temperature, and further improving the storage time of the pesticide. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure inside the barrel body of the present invention;

[0022] Figure 3 It is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure inside the liquid extraction cylinder of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the cylindrical shell and the rotating block in the present invention;

[0026] Figure 7 For the present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 8 It is a schematic cross-sectional structural diagram of the liquid outlet pipe and the piston plate in the present invention.

[0028] Reference numerals:

[0029] 1. Barrel; 2. Liquid pumping cylinder; 3. Piston plate; 4. Liquid outlet pipe; 5. Liquid suction extension pipe; 6. Liquid inlet hole; 7. Filling pipe; 101. Guide plate; 102. Cylindrical shell; 103. Rotating block; 104. Flow channel; 105. Gear; 106. Rack; 107. Sliding pin; 108. Upper straight groove; 109. Inclined groove; 110. Lower straight groove; 111. Rack guide block; 112. Rack guide groove; 201. First spring; 202. First sealing ring; 203. Push Pull sleeve; 301, annular groove; 302, permanent magnet; 303, iron ring; 304, second sealing ring; 305, disc spring; 401, reversing tube; 402, connecting tube; 403, movable valve core; 404, return spring; 405, first valve core flow channel; 406, second valve core flow channel; 407, first tube wall flow channel; 408, second tube wall flow channel; 409, air cylinder; 410, air cylinder piston; 411, air cylinder spring; 412, external air pipe. DETAILED DESCRIPTION

[0030] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a sealed packaging device for pesticides through improvement. The technical solution of the present invention is:

[0032] like Figures 1 to 8 As shown, an embodiment of the present invention provides a sealed packaging device for insecticides, including a barrel body 1, a liquid pumping cylinder 2 is arranged at the inner upper end of the barrel body 1, a piston plate 3 is slidably connected to the inner side of the liquid pumping cylinder 2, a liquid outlet pipe 4 extending to the outside of the barrel body 1 is fixed on the upper side of the piston plate 3, a pipe mouth blocking mechanism is arranged between the liquid outlet pipe 4 and the liquid pumping cylinder 2, and two pressure balancing mechanisms for balancing the pressure inside the barrel body 1 are arranged inside the barrel body 1; the pipe mouth blocking mechanism includes two guide groove plates 101 fixed to the inner side of the liquid pumping cylinder 2 and a cylindrical shell 102 arranged at the middle section of the liquid outlet pipe 4, and a rotating block 103 (such as a rotating block 103) is rotatably connected to the inner side of the cylindrical shell 102. Figure 6 As shown, a flow channel 104 is provided inside the rotating block 103, and a gear 105 is fixed to one end of the rotating block 103. A rack 106 meshing with the gear 105 is movably provided on the outer side of the cylindrical shell 102. Both ends of the rack 106 are movably connected to the guide groove structure inside the two guide groove plates 101. The guide groove structure includes an upper straight groove 108, an inclined groove 109, and a lower straight groove 110 provided inside the guide groove plate 101. 10 are arranged from top to bottom, and the upper straight groove 108, the inclined groove 109, and the lower straight groove 110 are smoothly connected from head to tail, two sliding pins 107 are rotatably connected at both ends of the rack 106, and the two sliding pins 107 are respectively slidably connected to the inner sides of the upper straight groove 108, the inclined groove 109, and the lower straight groove 110 at corresponding positions, and a connecting hole for connecting the liquid outlet pipe 4 with the interior of the liquid pumping cylinder 2 is opened at the center position of the piston plate 3, and the interior of the cylindrical shell 102 is connected to the interior of the liquid outlet pipe 4.

[0033] Furthermore, a rack guide block 111 is fixed to the outer side of the cylindrical shell 102, a rack guide groove 112 is provided inside the rack 106, and the rack guide block 111 is slidably connected to the inner side of the rack guide groove 112;

[0034] The sliding fit between the rack guide block 111 and the rack guide groove 112 ensures the smoothness of the horizontal left-right movement of the rack 106 .

[0035] Furthermore, the lower end of the liquid extraction cylinder 2 is connected to a liquid suction extension tube 5 extending to the bottom of the barrel body 1, and a plurality of liquid inlet holes 6 are opened at the lower end of the outer side of the liquid suction extension tube 5, and a one-way valve is arranged inside the liquid inlet hole 6 and the liquid outlet pipe 4, and the conduction direction of the one-way valve inside the liquid inlet hole 6 and the liquid outlet pipe 4 is pointed to the upper end direction of the liquid outlet pipe 4, and a filling pipe 7 is inserted into the outer side of the barrel body 1;

[0036] The liquid suction extension tube 5 extends to the bottom of the barrel body 1 so that the insecticide in the barrel body 1 can be completely extracted, and the insecticide can be conveniently added to the barrel body 1 through the filling tube 7.

[0037] Furthermore, two permanent magnets 302 are installed at both ends of the outer side of the cylindrical shell 102, and two annular grooves 301 are provided inside the rotating block 103 at the two end positions corresponding to the flow channel 104, and the inner sides of the two annular grooves 301 are slidably connected with iron rings 303, and one end of the two iron rings 303 is connected with a second sealing ring 304 that can contact the inner side of the cylindrical shell 102, and the two iron rings 303 are elastically connected to one end of the inner side of the two annular grooves 301 through disc springs 305;

[0038] When the flow channel 104 rotates to a horizontal angle, the two iron rings 303 at both ends of the flow channel 104 are aligned with the two permanent magnets 302 respectively, and the two permanent magnets 302 generate magnetic attraction on the two iron rings 303, so that the two iron rings 303 apply thrust to the two second sealing rings 304 respectively, and at the same time squeeze the two disc springs 305, so that one end of the two second sealing rings 304 can fit tightly against the inner side of the cylindrical shell 102, thereby isolating the residual insecticide inside the flow channel 104 from the external air.

[0039] Furthermore, a push-pull sleeve 203 is fixed at the center of the upper side of the piston plate 3, the liquid outlet pipe 4 is elastically connected to the upper end of the push-pull sleeve 203 via a first spring 201, and the outer lower end of the liquid outlet pipe 4 is sleeved with a first sealing ring 202 that is slidably connected to the inner side of the push-pull sleeve 203;

[0040] When the liquid outlet pipe 4 and the sliding pin 107 move downward, the lower end of the liquid outlet pipe 4 will compress the first spring 201, and at the same time, the lower end of the liquid outlet pipe 4 will slide toward the bottom of the push-pull sleeve 203. When the sliding pin 107 slides from the inner side of the inclined groove 109 into the inner side of the lower straight groove 110, the first spring 201 can be compressed to the limit, and the lower end of the liquid outlet pipe 4 moves downward to fit with the push-pull sleeve 203. At this time, the liquid outlet pipe 4 continues to move downward, which can drive the piston plate 3 to move downward, thereby first driving the rotating block 103 to rotate and connect the flow channel 104 with the liquid outlet pipe 4. The piston plate 3 is driven downward by the liquid outlet pipe 4, that is, during the rotation of the rotating block 103, the liquid outlet pipe 4 descends and only compresses the first spring 201 without driving the push-pull sleeve 203 to descend. When the rotating block 103 finishes rotating, the liquid outlet pipe 4 continues to move downward and can drive the piston plate 3 to move downward, ensuring that the liquid extraction cylinder 2 and the barrel body 1 are connected to the outside world only when the pesticide needs to be extracted. When no extraction is done, the liquid outlet pipe 4 moves up to the highest point, and the flow channel 104 is not connected to the liquid outlet pipe 4, thereby ensuring that the liquid extraction cylinder 2 and the inside of the barrel body 1 are always isolated from the outside world.

[0041] Further, the pressure balancing mechanism includes an air cylinder 409 arranged on the inner side of the barrel body 1, and an air cylinder piston 410 is slidably connected to the inner side of the air cylinder 409. The lower end of the air cylinder piston 410 is elastically connected to the inner lower end of the air cylinder 409 through an air cylinder spring 411. A two-way conduction mechanism is arranged between the interior of the air cylinder 409 and the interior of the barrel body 1. Nitrogen that does not react with the pesticide is stored in the space above the air cylinder piston 410 in the air cylinder 409; the two-way conduction mechanism includes a reversing tube 401 (such as Figure 7 As shown), both ends of the reversing tube 401 are connected to the interior of the barrel body 1 and the air storage cylinder 409 respectively through the connecting tube 402, and a movable valve core 403 is movably provided at the middle position of the inner side of the reversing tube 401, and both ends of the movable valve core 403 are elastically connected to the inner side of the reversing tube 401 through two reset springs 404, and the first valve core flow channel 405 and the second valve core flow channel 406 are respectively provided at the two ends of the interior of the movable valve core 403, and the first tube wall flow channel 407 and the second tube wall flow channel 408 which can be connected to the first valve core flow channel 405 and the second valve core flow channel 406 respectively are provided on both sides of the interior of the reversing tube 401.

[0042] Through the pressure balancing mechanism, when the insecticide liquid level in the barrel body 1 decreases, the air pressure in the barrel body 1 decreases. At this time, nitrogen that does not react with the insecticide can be filled into the inner side of the barrel body 1. Compared with the existing insecticide packaging device, it can prevent outside air from entering the interior of the barrel body 1, reduce the contact between the insecticide and oxygen in the air, thereby further preventing the insecticide from deteriorating and further extending the storage time of the insecticide.

[0043] Furthermore, the lower end of the gas storage cylinder 409 is connected to an external gas pipe 412 extending to the outside of the barrel 1;

[0044] The outer air pipe 412 connects the space at the lower end of the air cylinder 409 with the outside world, so that the air cylinder piston 410 can be prevented from being affected by the resistance of the air at the lower end of the air cylinder 409 when it moves up and down.

[0045] Working principle: When in use, the insecticide to be packaged and stored is injected into the barrel body 1 through the filling pipe 7 for storage. A check valve is arranged inside the filling pipe 7 to prevent the insecticide inside the barrel body 1 from overflowing. When the insecticide needs to be taken from the inside of the barrel body 1, the pressure plate outside the liquid outlet pipe 4 is pressed, and the pressure plate drives the liquid outlet pipe 4 to move toward the inside of the liquid pumping cylinder 2. The liquid outlet pipe 4 drives the piston plate 3 to move toward the bottom end of the liquid pumping cylinder 2, and the air between the lower end of the piston plate 3 and the bottom end of the liquid pumping cylinder 2 can be discharged outwardly through the liquid outlet pipe 4 and the flow channel 104. When the piston plate 3 moves to the bottom of the liquid pumping cylinder 2, the liquid outlet pipe 4 is driven upward by the pressure plate, and the piston plate 3 is driven upward, so that the air inside the barrel body 1 can be discharged. The pesticide in the liquid pumping cylinder 2 is sucked into the inner side of the liquid pumping cylinder 2 through the liquid suction extension tube 5, and then the liquid outlet tube 4 and the piston plate 3 are pressed down again. Under the pressure of the piston plate 3, since the conduction directions of the one-way valve inside the liquid inlet hole 6 and the liquid outlet tube 4 are both directed to the upper end direction of the liquid outlet tube 4, the pesticide sucked into the liquid pumping cylinder 2 can be pressed outward through the connecting hole in the center of the piston plate 3, the liquid outlet tube 4 and the flow channel 104, so that the pesticide can be taken out. Compared with the existing storage barrel with a sealing cover, the device does not need to open the sealing cover every time the pesticide is taken out, so that the outside air will not be introduced into the inner side of the barrel body 1, thereby greatly delaying the deterioration period of the pesticide and extending the storage time of the pesticide.

[0046] After taking the pesticide each time, the liquid outlet pipe 4 is pulled upward to the highest point, and the piston plate 3 is driven to move upward to the highest point at the same time. The liquid outlet pipe 4 drives the cylindrical shell 102 of the pipe opening blocking mechanism to move upward synchronously, and the cylindrical shell 102 drives the gear 105 and the rack 106 to move. The rack 106 drives the two sliding pins 107 at both ends to move upward. When the two sliding pins 107 move upward with the liquid outlet pipe 4, the two sliding pins 107 will slide through the lower straight groove 110, the inclined groove 109 and the upper straight groove 108 in sequence. When the two sliding pins 107 slide through the two inclined grooves 109, under the guidance of the inclined grooves 109, the rack 106 will be driven to move horizontally to the right through the two sliding pins 107 (such as Figure 5 As shown), the rack 106 drives the gear 105 to rotate 90° through the teeth, the gear 105 drives the rotating block 103 inside the cylindrical shell 102 to rotate 90°, and the rotating block 103 drives the flow channel 104 inside it to rotate 90°, so that the flow channel 104 rotates to a horizontal angle. At this time, the two ends of the flow channel 104 are not connected to the inside of the liquid outlet pipe 4 (as shown in FIG. Figure 6As shown), the insecticide inside the barrel body 1 can be isolated from the outside air, so that the outside air can be well prevented from penetrating into the inside of the barrel body 1 during long-term storage, greatly extending the storage time of the insecticide inside the barrel body 1;

[0047] When the insecticide is taken out next time, when the liquid outlet pipe 4 is pressed, the liquid outlet pipe 4 will drive the two sliding pins 107 of the pipe opening blocking mechanism to move downward from the inner side of the upper straight groove 108 to the inner side of the inclined groove 109. According to the above principle, it can drive the rack 106 to move in the left reverse direction, thereby driving the gear 105 and the rotating block 103 to rotate 90 degrees in the opposite direction, so that the flow channel 104 is connected with the liquid outlet pipe 4 again. When the liquid outlet pipe 4 and the sliding pin 107 move downward, the lower end of the liquid outlet pipe 4 will compress the first spring 201, and at the same time, the lower end of the liquid outlet pipe 4 will slide toward the bottom of the push-pull sleeve 203. When the sliding pin 107 slides from the inner side of the inclined groove 109 into the lower straight groove 11 0, at this time, the first spring 201 can be compressed to the limit, and the lower end of the liquid outlet pipe 4 moves down to the closest point to the lower end of the push-pull sleeve 203. At this time, the liquid outlet pipe 4 continues to move downward, which can drive the piston plate 3 to move downward, thereby first driving the rotating block 103 to rotate to connect the flow channel 104 with the liquid outlet pipe 4, and then driving the piston plate 3 to move downward, ensuring that the liquid extraction cylinder 2 and the barrel body 1 are connected to the outside world only when the pesticide needs to be extracted. When not extracting, the liquid outlet pipe 4 moves up to the highest point, and the flow channel 104 is not connected to the liquid outlet pipe 4, thereby ensuring that the inside of the liquid extraction cylinder 2 and the barrel body 1 are always isolated from the outside world, further improving the sealing effect of the device;

[0048] Each time the liquid outlet pipe 4 moves up to the highest point, it drives the rotating block 103 to rotate 90°, so that the flow channel 104 rotates to a horizontal angle. At this time, the two iron rings 303 at both ends of the flow channel 104 are aligned with the two permanent magnets 302 respectively. The two permanent magnets 302 generate magnetic attraction on the two iron rings 303, so that the two iron rings 303 apply thrust to the two second sealing rings 304 respectively, and at the same time squeeze the two disc springs 305, so that one end of the two second sealing rings 304 can be tightly fitted to the inner side of the cylindrical shell 102, so that the flow channel 104 can be opened. The residual pesticide inside 104 is isolated from the external air, ensuring that the residual pesticide inside the flow channel 104 does not deteriorate. When the rotating block 103 rotates again, the two ends of the flow channel 104 are not aligned with the two permanent magnets 302. At this time, the two iron rings 303 are not subjected to the magnetic attraction of the two permanent magnets 302, and the two iron rings 303 are subjected to the elastic force of the two disc springs 305, thereby reducing the thrust on the two second sealing rings 304 and the pressure between the second sealing rings 304 and the inner side of the cylindrical shell 102, thereby reducing the rotation resistance of the rotating block 103 and facilitating operation.

[0049] Each time a certain amount of pesticide is extracted from the barrel body 1, the air pressure in the space inside the barrel body 1 where the pesticide is not contained will decrease. Since the air storage cylinder 409 is filled with nitrogen, when the air pressure inside the barrel body 1 decreases, a pressure difference will be generated between the air storage cylinder 409 and the barrel body 1. The nitrogen with a higher pressure inside the air storage cylinder 409 will enter the inner side of the reversing tube 401 of the two-way conducting mechanism. The nitrogen pushes the movable valve core 403 to move toward the end connected to the barrel body 1. When the movable valve core 403 moves, the two reset springs 404 will be compressed and stretched respectively. When the pressure difference reaches a certain value, the movable valve core 403 moves to a certain distance. , the second valve core flow channel 406 inside the movable valve core 403 is connected to the second tube wall flow channel 408 inside the reversing tube 401, so that the nitrogen inside the gas storage cylinder 409 flows into the inside of the barrel body 1 through the connecting pipe 402, the second valve core flow channel 406 and the second tube wall flow channel 408, so that the pressure between the barrel body 1 and the gas storage cylinder 409 can be balanced. Compared with the existing insecticide packaging device, it can prevent the outside air from entering the internal balance pressure of the barrel body 1, reduce the contact between the insecticide and the oxygen in the air, so as to further prevent the insecticide from deteriorating and further extend the storage time of the insecticide;

[0050] As the ambient temperature changes, due to the effect of thermal expansion and contraction, the internal temperature of the barrel body 1 becomes higher than the external temperature, or when insecticide is added to the barrel body 1, the air pressure inside the barrel body 1 will increase. At this time, the air pressure inside the barrel body 1 will be higher than the air pressure inside the gas cylinder 409. According to the above principle, the high-pressure gas inside the barrel body 1 will push the movable valve core 403 of the two-way conduction mechanism to move toward the end connected to the gas cylinder 409, so that the first valve core flow channel 405 is connected to the first tube wall flow channel 407, so that the high-pressure nitrogen inside the barrel body 1 and the volatile gas in the insecticide can be introduced into the inner side of the gas cylinder 409, which can prevent the volatile gas of the insecticide inside the barrel body 1 from emitting outward, thereby preventing the concentration of the insecticide from being reduced due to the influence of temperature, and further improving the shelf life of the insecticide.

[0051] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealed packaging device for pesticides, comprising a barrel (1), characterized in that: A liquid extraction cylinder (2) is arranged at the inner upper end of the barrel body (1), a piston plate (3) is slidably connected to the inner side of the liquid extraction cylinder (2), a liquid outlet pipe (4) extending to the outside of the barrel body (1) is fixed on the upper side of the piston plate (3), a pipe opening blocking mechanism is arranged between the liquid outlet pipe (4) and the liquid extraction cylinder (2), and two pressure balancing mechanisms for balancing the pressure inside the barrel body (1) are arranged inside the barrel body (1); The pipe orifice blocking mechanism comprises two guide groove plates (101) fixed on the inner side of the liquid extraction cylinder (2) and a cylindrical shell (102) arranged at the middle section of the liquid outlet pipe (4); a rotating block (103) is rotatably connected to the inner side of the cylindrical shell (102); a flow channel (104) is provided inside the rotating block (103); a gear (105) is fixed to one end of the rotating block (103); a rack (106) meshing with the gear (105) is movably provided on the outer side of the cylindrical shell (102); and two ends of the rack (106) are movably connected to the guide groove structures inside the two guide groove plates (101), respectively.

2. The sealed packaging device for pesticides according to claim 1, characterized in that: The guide groove structure comprises an upper straight groove (108), an inclined groove (109), and a lower straight groove (110) which are arranged inside the guide groove plate (101); the upper straight groove (108), the inclined groove (109), and the lower straight groove (110) are arranged sequentially from top to bottom, and the upper straight groove (108), the inclined groove (109), and the lower straight groove (110) are smoothly connected end to end; two sliding pins (107) are rotatably connected at both ends of the rack (106); the two sliding pins (107) are respectively slidably connected to the inner sides of the upper straight groove (108), the inclined groove (109), and the lower straight groove (110) at corresponding positions.

3. The sealed packaging device for pesticides according to claim 1, characterized in that: A rack guide block (111) is fixed on the outer side of the cylindrical shell (102), a rack guide groove (112) is provided inside the rack (106), and the rack guide block (111) is slidably connected to the inner side of the rack guide groove (112).

4. The sealed packaging device for pesticides according to claim 1, characterized in that: The lower end of the liquid suction cylinder (2) is connected to a liquid suction extension tube (5) extending to the bottom of the barrel body (1); a plurality of liquid inlet holes (6) are provided on the outer side of the liquid suction extension tube (5) at the lower end; both the liquid inlet holes (6) and the liquid outlet tube (4) are provided with one-way valves; the conduction directions of the one-way valves in the liquid inlet holes (6) and the liquid outlet tube (4) are both directed toward the upper end of the liquid outlet tube (4); and a filling tube (7) is inserted on the outer side of the barrel body (1).

5. The sealed packaging device for pesticides according to claim 1, characterized in that: A connecting hole for connecting the liquid outlet pipe (4) with the interior of the liquid pumping cylinder (2) is provided at the center of the piston plate (3), and the interior of the cylindrical shell (102) is connected with the interior of the liquid outlet pipe (4).

6. The sealed packaging device for pesticides according to claim 1, characterized in that: Two permanent magnets (302) are installed at both ends of the outer side of the cylindrical shell (102), and two annular grooves (301) are provided at the two end positions of the inner side of the rotating block (103) corresponding to the flow channel (104). The inner sides of the two annular grooves (301) are slidably connected with iron rings (303), and one end of the two iron rings (303) is connected with a second sealing ring (304) that can contact the inner side of the cylindrical shell (102), and the two iron rings (303) are elastically connected to one end of the inner side of the two annular grooves (301) through disc springs (305).

7. The sealed packaging device for pesticides according to claim 1, characterized in that: A push-pull sleeve (203) is fixed at the center position on the upper side of the piston plate (3), the liquid outlet pipe (4) is elastically connected to the upper end of the push-pull sleeve (203) via a first spring (201), and the outer lower end of the liquid outlet pipe (4) is sleeved with a first sealing ring (202) that is slidably connected to the inner side of the push-pull sleeve (203).

8. The sealed packaging device for pesticides according to claim 1, characterized in that: The pressure balancing mechanism comprises an air cylinder (409) arranged on the inner side of the barrel (1); an air cylinder piston (410) is slidably connected to the inner side of the air cylinder (409); the lower end of the air cylinder piston (410) is elastically connected to the inner lower end of the air cylinder (409) via an air cylinder spring (411); a two-way conducting mechanism is arranged between the interior of the air cylinder (409) and the interior of the barrel (1); and nitrogen that does not react with the insecticide is stored in the space above the air cylinder piston (410) inside the air cylinder (409).

9. The sealed packaging device for pesticides according to claim 8, characterized in that: The two-way conducting mechanism comprises a reversing tube (401) arranged outside the barrel body (1), both ends of the reversing tube (401) are respectively connected to the barrel body (1) and the inside of the gas storage cylinder (409) through a connecting tube (402), and a movable valve core (403) is movably arranged at the middle position of the inner side of the reversing tube (401), and both ends of the movable valve core (403) are elastically connected to the inner side of the reversing tube (401) through two return springs (404), and a first valve core flow channel (405) and a second valve core flow channel (406) are respectively provided at both ends of the inner side of the movable valve core (403), and a first tube wall flow channel (407) and a second tube wall flow channel (408) which can be respectively connected to the first valve core flow channel (405) and the second valve core flow channel (406) are provided on both sides of the inner side of the reversing tube (401).

10. The sealed packaging device for pesticides according to claim 8, characterized in that: The lower end of the air storage cylinder (409) is connected to an external air pipe (412) extending to the outside of the barrel (1).

Images