Grain depot circulation fumigation gas box

Abstract

The utility model relates to the technical field of grain depot circulation fumigation, in particular to a grain depot circulation fumigation gas box. Comprising an open fumigation gas box main body, supporting rings and connecting rings, an end cover assembly is movably installed in the top end of the open fumigation gas box body, an annular groove is formed in the inner side face of the supporting ring, a first circulation fumigation assembly is rotatably installed in the supporting ring, a first limiting assembly is fixedly installed in the open fumigation gas box body, and a third screw is in threaded connection with the interior of a ring body of a connecting ring. A second circulation fumigation assembly is fixedly installed at the bottom of the connecting ring, a stirring assembly is rotationally installed at the bottom of the open fumigation gas box body, a supporting assembly is fixedly installed at the bottom of the open fumigation gas box body, and second limiting assemblies are fixedly installed on the left side and the right side of the open fumigation gas box body. The technical problems that used insect prevention medicine is inconvenient to take out and small-batch grains in the grain depot are inconvenient to circularly fumigate are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of grain depot circulating fumigation, in particular to a grain depot circulating fumigation gas box. Background Art

[0002] Grain depot circulating fumigation refers to a technology that promotes the uniform distribution of fumigation gas in the grain pile in the grain depot through gas circulation, maintains a certain concentration and time in the grain depot, and kills pests at various growth stages. In the process of grain depot circulating fumigation, because the grain in the grain depot is generally in large quantities, the grain depot circulating fumigation system is generally used to carry out circulating fumigation on the grain in the grain depot. When the grain in the grain depot is in small batches, it will be a waste of resources to use the grain depot circulating fumigation system to carry out circulating fumigation on small batches of grain in the grain depot. At this time, a fumigation device suitable for small batches of grain in the grain depot is needed. Therefore, a grain depot circulating fumigation gas box is needed.

[0003] However, in the prior art, when the grain depot circulating fumigation system is used to perform circulating fumigation on small batches of grain in the grain depot, the insect repellent is generally placed directly inside the small batch of grain. Since there is no indirect drug release device, the insect repellent can only be taken out by screening after use, which is very troublesome and increases the difficulty of taking out the used insect repellent. In the prior art, the grain depot circulating fumigation system is generally used to perform circulating fumigation on small batches of grain in the grain depot. Since the circulating fumigation system performs circulating fumigation on the space where the entire grain depot is located, and the small batch of grain only occupies a small part of the space in the grain depot, when the grain depot circulating fumigation system is used to perform circulating fumigation on small batches of grain in the grain depot, the small batch of grain in the grain depot may be over-fumigated, which may damage the small batch of grain in the grain depot and increase the difficulty of circulating fumigation of small batches of grain in the grain depot. Utility Model Content

[0004] The utility model provides a grain depot circulating fumigation gas box to solve the problems in the prior art of being inconvenient to take out used insect repellents and inconvenient to fumigate small batches of grain in the grain depot, which can facilitate the removal of used insect repellents and facilitate the circulating fumigation of small batches of grain in the grain depot.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grain depot circulating fumigation gas box, comprising an open fumigation gas box body, a support ring and a connecting ring; an end cover assembly is movably installed inside the top of the open fumigation gas box body, an annular groove is provided on the inner side of the support ring, a first circulating fumigation assembly is rotatably installed inside the support ring, a first limiting assembly is fixedly installed inside the open fumigation gas box body, a third screw is threadedly connected inside the ring body of the connecting ring, a second circulating fumigation assembly is fixedly installed on the bottom of the connecting ring, a stirring assembly is rotatably installed on the bottom of the open fumigation gas box body, a support assembly is fixedly installed on the bottom of the open fumigation gas box body, and second limiting assemblies are fixedly installed on the left and right sides of the open fumigation gas box body.

[0006] Furthermore, the end cover assembly includes an inner end cover, which is movably installed inside the top end of the open fumigation gas box body, a protective groove is provided at the bottom of the inner end cover, the top of the inner end cover is fixedly connected to the outer end cover, the top of the outer end cover is fixedly connected to the handle, the inner thread of the outer end cover is connected to the first screw, and the first screw is threadedly connected to the first thread groove.

[0007] Furthermore, the first circulating fumigation assembly includes a columnar support frame, the top end of the columnar support frame is rotatably mounted inside the support ring, a third thread groove is provided on the top of the columnar support frame, the third thread groove is threadedly connected to the third screw, the top outer side surface of the columnar support frame is fixedly connected to a limiting ring, the limiting ring is rotatably mounted inside the annular groove, the inner side surface of the columnar support frame is fixedly connected to a limiting vertical plate, the frame body of the columnar support frame is fixedly connected to a cylindrical air permeable net, and a plurality of air holes are provided inside the cylindrical body of the cylindrical air permeable net.

[0008] Furthermore, the first limiting assembly includes a limiting cylinder, which is fixedly installed inside the open fumigation gas box body, and a supporting long rod is fixedly connected to the inner side of the top of the limiting cylinder, and one end of the supporting long rod is fixedly installed on the outer side of the support ring.

[0009] Furthermore, the second circulating fumigation assembly includes a connecting vertical plate, the top of which is fixedly mounted on the bottom of the connecting ring, the connecting vertical plate is movably connected to the columnar support frame, the bottom of the connecting vertical plate is fixedly connected with a hollow charge column, the hollow charge column is movably connected to the columnar support frame, a limited long groove is provided on the outer side surface of the hollow charge column, and the limited long groove is movably connected to the limited vertical plate.

[0010] Furthermore, the stirring assembly includes a supporting plate, the top of which is rotatably mounted on the bottom of the open fumigation gas box body, the bottom of the supporting plate is fixedly connected to a positioning plate, the outer surface of the supporting plate is provided with a plurality of anti-slip long grooves, the interior of the supporting plate is provided with threaded holes, the top of the supporting plate is fixedly connected to a connecting column, the connecting column is rotatably mounted inside the box body of the open fumigation gas box body, the top of the connecting column is fixedly connected to a connecting plate, the connecting plate is rotatably connected to the open fumigation gas box body and the limiting cylinder respectively, the top of the connecting plate is fixedly mounted on the bottom of the columnar support frame, and the top of the connecting plate is fixedly connected to a plurality of stirring plates and a plurality of stirring square rods respectively.

[0011] Furthermore, the supporting assembly includes a triangular plate, the top of which is fixedly mounted on the bottom of the open fumigation gas box body, the triangular plate is rotatably connected to the supporting plate, the bottom of the triangular plate is fixedly connected to a supporting base plate, the supporting base plate is rotatably connected to the supporting plate, a positioning groove is provided on the top of the supporting base plate, the positioning groove is rotatably connected to the positioning plate, a second limiting block is fixedly connected to the left and right sides of the supporting base plate, and a second threaded groove is provided on the top of the second limiting block.

[0012] Furthermore, the second limit assembly includes two first limit blocks, the left side of one first limit block is fixedly installed on the right side of the open fumigation gas box body, and the right side of the other first limit block is fixedly installed on the left side of the open fumigation gas box body, and the internal thread of the first limit block is connected with the second screw, and the second screw is threadedly connected with the threaded hole and the second thread groove respectively.

[0013] The working principle and use principle of the utility model are as follows: in the process of using the device, the top of the device is opened and closed through the end cover assembly, and the small batch of grain in the grain warehouse is located inside the device through the first circulating fumigation assembly, the first limiting assembly, and the second circulating fumigation assembly, so that the insect repellent is indirectly put into the small batch of grain in the device, and when the used insect repellent needs to be taken out, the insect repellent is directly taken out from the small batch of grain in the device, so as to avoid the device taking out the insect repellent by screening. The difficulty of using the medicine, and in the process of using the device, through the stirring component, the supporting component and the second limiting component, when the small batch of grain in the grain depot inside the device is subjected to circulating fumigation, the device stirs the small batch of grain in the grain depot, so that the small batch of grain in the grain depot is evenly subjected to circulating fumigation, thereby avoiding excessive fumigation of the small batch of grain in the grain depot due to non-stirring, avoiding damage to the small batch of grain in the grain depot due to excessive fumigation, and avoiding the device increasing the difficulty of circulating fumigation of the small batch of grain in the grain depot due to damage to the small batch of grain in the grain depot.

[0014] The beneficial technical effects of the utility model are:

[0015] By setting the end cover assembly, the top of the device can be opened and closed, and by setting the first circulating fumigation assembly, the first limiting assembly, and the second circulating fumigation assembly, a small batch of grain in the grain warehouse can be located inside the device, so that the insect repellent can be indirectly placed inside the small batch of grain in the device, and when the used insect repellent needs to be taken out, the insect repellent can be directly taken out from the small batch of grain in the device, so that the device can avoid the difficulty of taking out the used insect repellent due to taking out the insect repellent by screening, so that the device can easily take out the used insect repellent, and Through the arrangement of the stirring component, the supporting component and the second limiting component, when the small batches of grain in the grain depot are subjected to circulating fumigation, the device can stir the small batches of grain in the grain depot, so that the small batches of grain in the grain depot can be evenly subjected to circulating fumigation, the small batches of grain in the grain depot can be prevented from being over-fumigated due to not being stirred, the small batches of grain in the grain depot can be prevented from being damaged due to excessive fumigation, the device can avoid increasing the difficulty of circulating fumigation of small batches of grain in the grain depot due to damage of the small batches of grain in the grain depot, and the device can facilitate circulating fumigation of small batches of grain in the grain depot. When the device is used to perform circulation fumigation on a small batch of grain in a grain depot, the insect repellent can be placed inside the second circulation fumigation component, and the second circulation fumigation component containing the insect repellent can be placed inside the first circulation fumigation component, so that the insect repellent can be used to perform circulation fumigation on the small batch of grain in the grain depot through the first circulation fumigation component, so that the insect repellent can be indirectly placed inside the small batch of grain in the grain depot. After the circulation fumigation of the small batch of grain in the grain depot is performed BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 It is a frontal stereoscopic schematic diagram of the utility model.

[0018] Figure 2 It is a three-dimensional schematic diagram of the support base plate of the utility model.

[0019] Figure 3 It is a three-dimensional schematic diagram of the support plate of the utility model.

[0020] Figure 4 It is a three-dimensional schematic diagram of the limiting cylinder of the utility model.

[0021] Figure 5 It is a three-dimensional schematic diagram of a columnar support frame of the utility model.

[0022] Figure 6 It is a front cross-sectional schematic diagram of the utility model.

[0023] Figure 7It is a side sectional schematic diagram of the utility model.

[0024] Explanation of the numbers in the figure: 1. first screw rod; 2. outer end cover; 3. handle; 4. open fumigation gas box body; 5. second screw rod; 6. first stop block; 7. second stop block; 8. support plate; 9. anti-skid long groove; 10. support bottom plate; 11. triangle plate; 12. first thread groove; 13. support long rod; 14. stop cylinder; 15. support ring; 16. third screw rod; 17. connecting ring; 18. stirring blade ; 19. Stirring square rod; 20. Second thread groove; 21. Inner end cover; 22. Positioning groove; 23. Column support frame; 24. Cylindrical air permeable net; 25. Limiting ring; 26. Third thread groove; 27. Limiting vertical plate; 28. Limiting long groove; 29. ​​Hollow medicine column; 30. Connecting vertical plate; 31. Annular groove; 32. Connecting plate; 33. Protective groove; 34. Connecting column; 35. Positioning plate; 36. Threaded hole. DETAILED DESCRIPTION

[0025] The utility model of a grain storage circulating fumigation gas box is further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 7As shown: a grain storage circulating fumigation gas box, including an open fumigation gas box body 4, a support ring 15, a connecting ring 17, an inner end cover 21, a columnar support frame 23, a limit cylinder 14 and a connecting vertical plate 30, the inner side of the support ring 15 is provided with an annular groove 31, the inner body of the connecting ring 17 is threadedly connected with a third screw 16, the number of the third screw 16 is two, the bottom of the inner end cover 21 is provided with a protective groove 33, the top of the inner end cover 21 is fixedly connected with an outer end cover 2, and the top of the outer end cover 2 is fixedly connected with a handle The inner thread of the outer end cover 2 is connected with the first screw 1, the first screw 1 is threadedly connected with the first thread groove 12, the number of the first screw 1 is two, the top of the columnar support frame 23 is provided with a third thread groove 26, the third thread groove 26 is threadedly connected with the third screw 16, the top outer side surface of the columnar support frame 23 is fixedly connected with a limiting ring 25, the inner side surface of the columnar support frame 23 is fixedly connected with a limiting vertical plate 27, the frame body of the columnar support frame 23 is fixedly connected with a cylindrical air permeable net 24, the cylindrical air permeable net A plurality of air holes are provided inside the cylinder 24, a supporting long rod 13 is fixedly connected to the inner side surface of the top end of the limiting cylinder 14, a hollow medicine-releasing column 29 is fixedly connected to the bottom of the connecting vertical plate 30, and a limiting long groove 28 is provided on the outer side surface of the hollow medicine-releasing column 29. Through the arrangement of the end cover assembly, the top of the device can be opened and closed, and through the arrangement of the first circulating fumigation assembly, the first limiting assembly, and the second circulating fumigation assembly, the first circulating fumigation assembly and the second circulating fumigation assembly can perform circulating fumigation on small batches of grain in the granary, and the first limiting assembly can limit the second circulating fumigation assembly, so that the small batch of grain in the granary can be located inside the device, so that the insect repellent can be indirectly placed inside the small batch of grain in the device, and when the used insect repellent needs to be taken out, the insect repellent can be directly taken out from the small batch of grain in the device, so that the device can avoid the difficulty of taking out the used insect repellent due to taking out the insect repellent by screening, so that the device can easily take out the used insect repellent.

[0027] When in use, the size of the grain particles is larger than the size of the air holes provided on the cylindrical air permeable net 24, the first screw 1 is threadedly connected to the first thread groove 12, the third screw 16 is threadedly connected to the third thread groove 26, and the second screw 5 is threadedly connected to the second thread groove 20. When it is necessary to use the device to perform circulation fumigation on a small batch of grain in the grain depot, the two first screws 1 are rotated at the same time to disconnect the first screw 1 from the first thread groove 12 and to locate one end of the first screw 1 inside the outer end cover 2, and to move the outer end cover 2 upward so that the inner end cover 21 slides along the open fumigation gas box body 4. When the inner end cover 21 is disconnected from the open fumigation gas box body 4, the top of the open fumigation gas box body 4 is opened, and the small batch of grain in the grain depot is moved. Grain, so that the small batch of grain in the grain depot is located inside the limiting cylinder 14 inside the device, the insect repellent is moved so that the insect repellent is located inside the hollow medicine column 29, the handle 3 is moved to make the inner end cover 21 enter the inside of the open fumigation gas box body 4, and at the same time, the two first screws 1 are rotated in the opposite direction to make the first screw 1 threadedly connected with the first thread groove 12, so that the top of the open fumigation gas box body 4 is closed, and under the action of the protective groove 33, the top of the third screw 16 is prevented from colliding with the inner end cover 21. After a period of time, the insect repellent inside the device will react with the moisture in the small batch of grain in the grain depot located inside the device and produce medicinal gas. Under the action of the medicinal gas, the device can be used to treat the small batch of grain in the grain depot. Carry out circulating fumigation. After using the device to carry out circulating fumigation on a small batch of grain in the grain depot, when it is necessary to take out the used insect repellent, the two first screws 1 are rotated at the same time again to open the top of the open fumigation gas box body 4. After the top of the open fumigation gas box body 4 is opened, the two third screws 16 are rotated at the same time to disconnect the third screw 16 from the third thread groove 26 and make one end of the third screw 16 located inside the ring body of the connecting ring 17. Move the connecting ring 17 upward to make the connecting plate 30 and the hollow medicine column 29 slide along the columnar support frame 23, and make the limiting long groove 28 slide along the limiting plate 27. When the connecting plate 30 and the hollow medicine column 29 slide out of the columnar support frame 23 and when the limiting long groove 28 is opened, When sliding out from the limiting vertical plate 27, the connecting ring 17, the connecting vertical plate 30, the hollow medicine column 29 and the used insect repellent in the hollow medicine column 29 are all taken out from the inside of the device. At this time, the used insect repellent can be directly taken out from the hollow medicine column 29. In this process, the top of the device can be opened and closed, so that the small batch of grain in the grain warehouse can be located inside the device, so that the insect repellent can be indirectly placed inside the small batch of grain in the device, and when the used insect repellent needs to be taken out, the insect repellent can be directly taken out from the small batch of grain in the device, so that the device can avoid the difficulty of taking out the used insect repellent due to taking out the insect repellent by screening, so that the device can easily take out the used insect repellent.

[0028] like Figures 1 to 7 As shown: a grain storage circulating fumigation gas box, including an open fumigation gas box body 4, a support ring 15, a connecting ring 17, a support plate 8, a triangular plate 11 and two first limit blocks 6, the bottom of the support plate 8 is fixedly connected with a positioning plate 35, the outer surface of the support plate 8 is provided with a plurality of anti-skid long grooves 9, the interior of the support plate 8 is provided with a threaded hole 36, the top of the support plate 8 is fixedly connected with a connecting column 34, the top of the connecting column 34 is fixedly connected with a connecting plate 32, the top of the connecting plate 32 is respectively fixedly connected with a plurality of stirring plates 18 and a plurality of stirring square rods 19, the bottom of the triangular plate 11 is fixedly connected with a supporting bottom plate 10, the top of the supporting bottom plate 10 is provided with a positioning groove 22, the left and right sides of the supporting bottom plate 10 are fixedly connected with second limit blocks 7, the top of the second limit block 7 is provided with a second threaded groove 20, the inner thread of the first limit block 6 is connected with a second screw 5, the second screw 5 are respectively threadedly connected with the threaded hole 36 and the second thread groove 20, the number of the second screw rods 5 is two, and through the arrangement of the stirring assembly, the supporting assembly and the second limiting assembly, the stirring assembly can stir the small batch of grains in the grain depot located inside the device, the supporting assembly can support the device, and the second limiting assembly can limit the stirring assembly. When the small batch of grains in the grain depot are subjected to circulation fumigation, the device can stir the small batch of grains in the grain depot, so that the small batch of grains in the grain depot can be uniformly subjected to circulation fumigation, the small batch of grains in the grain depot can be prevented from being over-fumigated due to not being stirred, the small batch of grains in the grain depot can be prevented from being damaged due to being over-fumigated, the device can avoid increasing the difficulty of circulating fumigation of the small batch of grains in the grain depot due to damage of the small batch of grains in the grain depot, and the device can facilitate circulating fumigation of the small batch of grains in the grain depot.

[0029] When in use, in the process of using the device to perform circulation fumigation on a small batch of grain in a grain depot, the two second screw rods 5 are rotated at the same time, so that the second screw rods 5 are disconnected from the second thread groove 20 and the threaded hole 36 respectively, and one end of the second screw rod 5 is located inside the first limit block 6, and the support plate 8 is rotated through the anti-slip long groove 9, so that the support plate 8 rotates along the open fumigation gas box body 4, the triangular plate 11 and the support bottom plate 10 respectively, the positioning plate 35 rotates along the positioning groove 22, the connecting column 34 rotates along the open fumigation gas box body 4, the connecting plate 32 rotates along the open fumigation gas box body 4 and the limit cylinder 14 respectively, the columnar support frame 23 rotates along the support ring 15, the limit ring 25 rotates along the annular groove 31, the cylindrical air permeable net 24 rotates, the stirring sheet 18 and the stirring square rod 19 both rotate, and under the action of the stirring sheet 18 and the stirring square rod 19, the device The small batches of grain in the grain depot inside the device can be stirred. Under the action of stirring, the small batches of grain in the grain depot inside the device can be subjected to circulation fumigation. At the same time, under the action of the limiting cylinder 14, the small batches of grain in the grain depot inside the device can be located in the cylindrical space so that they can be fully stirred. In this process, when the small batches of grain in the grain depot are subjected to circulation fumigation, the device can stir the small batches of grain in the grain depot, so that the small batches of grain in the grain depot can be evenly subjected to circulation fumigation, so that the small batches of grain in the grain depot can be prevented from being over-fumigated due to not being stirred, and the small batches of grain in the grain depot can be prevented from being damaged due to excessive fumigation, so that the device can avoid increasing the difficulty of circulating fumigation of small batches of grain in the grain depot due to damage of small batches of grain in the grain depot, and the device can facilitate circulating fumigation of small batches of grain in the grain depot.

[0030] In this embodiment, the connecting ring 17 is a half-circle ring, both sides of the connecting vertical plate 30 and both sides of the limiting vertical plate 27 are arc surfaces, and an inner side wall of the limiting long groove 28 is an arc surface.

Claims

1. A grain depot circulating fumigation gas box, comprising an open fumigation gas box body (4), a support ring (15) and a connecting ring (17); characterized in that An end cap assembly is movably mounted inside the top of the open fumigation gas box body (4); an annular groove (31) is formed on the inner side of the support ring (15); a first circulating fumigation assembly is rotatably mounted inside the support ring (15); a first limiting assembly is fixedly mounted inside the open fumigation gas box body (4); a third screw rod (16) is threadedly connected inside the ring body of the connecting ring (17); a second circulating fumigation assembly is fixedly mounted at the bottom of the connecting ring (17); a stirring assembly is rotatably mounted at the bottom of the open fumigation gas box body (4); a support assembly is fixedly mounted at the bottom of the open fumigation gas box body (4); and second limiting assemblies are fixedly mounted on the left and right sides of the open fumigation gas box body (4).

2. A grain depot circulating fumigation gas box according to claim 1, characterized in that: The end cover assembly comprises an inner end cover (21), the inner end cover (21) being movably mounted inside the top end of an open fumigation gas box body (4), a protective groove (33) being provided at the bottom of the inner end cover (21), an outer end cover (2) being fixedly connected to the top of the inner end cover (21), a handle (3) being fixedly connected to the top of the outer end cover (2), a first screw rod (1) being threadedly connected to the inner part of the outer end cover (2), and the first screw rod (1) being threadedly connected to a first thread groove (12).

3. A grain depot circulating fumigation gas box according to claim 2, characterized in that: The first circulating fumigation assembly comprises a columnar support frame (23), the top end of the columnar support frame (23) is rotatably mounted inside the support ring (15), a third thread groove (26) is provided on the top of the columnar support frame (23), the third thread groove (26) is threadedly connected to the third screw rod (16), the top outer side surface of the columnar support frame (23) is fixedly connected to a limit ring (25), the limit ring (25) is rotatably mounted inside the annular groove (31), the inner side surface of the columnar support frame (23) is fixedly connected to a limit vertical plate (27), the frame body of the columnar support frame (23) is fixedly connected to a cylindrical air permeable net (24), and the cylindrical body of the cylindrical air permeable net (24) is provided with a plurality of air holes.

4. A grain depot circulating fumigation gas box according to claim 1, 2 or 3, characterized in that: The first limiting assembly comprises a limiting cylinder (14), the limiting cylinder (14) being fixedly mounted inside the open fumigation gas box body (4), the inner side surface of the top end of the limiting cylinder (14) being fixedly connected to a supporting long rod (13), and one end of the supporting long rod (13) being fixedly mounted on the outer side surface of the supporting ring (15).

5. A grain depot circulating fumigation gas box according to claim 1, 2 or 3, characterized in that: The second circulating fumigation assembly comprises a connecting plate (30), the top of the connecting plate (30) is fixedly mounted on the bottom of the connecting ring (17), the connecting plate (30) is movably connected to the columnar support frame (23), the bottom of the connecting plate (30) is fixedly connected to a hollow charge column (29), the hollow charge column (29) is movably connected to the columnar support frame (23), the outer side surface of the hollow charge column (29) is provided with a limited long groove (28), and the limited long groove (28) is movably connected to the limited plate (27).

6. A grain depot circulating fumigation gas box according to claim 1, 2 or 3, characterized in that: The stirring assembly comprises a support plate (8), the top of the support plate (8) is rotatably mounted on the bottom of an open fumigation gas box body (4), the bottom of the support plate (8) is fixedly connected to a positioning plate (35), the outer surface of the support plate (8) is provided with a plurality of anti-slip long grooves (9), the interior of the support plate (8) is provided with a threaded hole (36), the top of the support plate (8) is fixedly connected to a connecting column (34), the connecting column (34) is rotatably mounted inside the box body of the open fumigation gas box body (4), the top of the connecting column (34) is fixedly connected to a connecting plate (32), the connecting plate (32) is rotatably connected to the open fumigation gas box body (4) and the limiting cylinder (14), the top of the connecting plate (32) is fixedly mounted on the bottom of a columnar support frame (23), and the top of the connecting plate (32) is fixedly connected to a plurality of stirring plates (18) and a plurality of stirring square rods (19).

7. A grain depot circulating fumigation gas box according to claim 5, characterized in that: The stirring assembly comprises a support plate (8), the top of the support plate (8) is rotatably mounted on the bottom of an open fumigation gas box body (4), the bottom of the support plate (8) is fixedly connected to a positioning plate (35), the outer surface of the support plate (8) is provided with a plurality of anti-slip long grooves (9), the interior of the support plate (8) is provided with a threaded hole (36), the top of the support plate (8) is fixedly connected to a connecting column (34), the connecting column (34) is rotatably mounted inside the box body of the open fumigation gas box body (4), the top of the connecting column (34) is fixedly connected to a connecting plate (32), the connecting plate (32) is rotatably connected to the open fumigation gas box body (4) and the limiting cylinder (14), the top of the connecting plate (32) is fixedly mounted on the bottom of a columnar support frame (23), and the top of the connecting plate (32) is fixedly connected to a plurality of stirring plates (18) and a plurality of stirring square rods (19).

8. A grain depot circulating fumigation gas box according to claim 1, 2, 3 or 7, characterized in that: The support assembly comprises a triangular plate (11), the top of the triangular plate (11) is fixedly mounted on the bottom of the open fumigation gas box body (4), the triangular plate (11) is rotatably connected to the support plate (8), the bottom of the triangular plate (11) is fixedly connected to a support base plate (10), the support base plate (10) is rotatably connected to the support plate (8), a positioning groove (22) is provided on the top of the support base plate (10), the positioning groove (22) is rotatably connected to the positioning plate (35), the left and right sides of the support base plate (10) are fixedly connected to second limit blocks (7), and the top of the second limit block (7) is provided with a second threaded groove (20).

9. A grain depot circulating fumigation gas box according to claim 6, characterized in that: The support assembly comprises a triangular plate (11), the top of the triangular plate (11) is fixedly mounted on the bottom of the open fumigation gas box body (4), the triangular plate (11) is rotatably connected to the support plate (8), the bottom of the triangular plate (11) is fixedly connected to a support base plate (10), the support base plate (10) is rotatably connected to the support plate (8), a positioning groove (22) is provided on the top of the support base plate (10), the positioning groove (22) is rotatably connected to the positioning plate (35), the left and right sides of the support base plate (10) are fixedly connected to second limit blocks (7), and the top of the second limit block (7) is provided with a second threaded groove (20).

10. A grain depot circulating fumigation gas box according to claim 1, 2, 3, 7 or 9, characterized in that: The second limiting assembly comprises two first limiting blocks (6), the left side of one first limiting block (6) being fixedly mounted on the right side of the open fumigation gas box body (4), and the right side of the other first limiting block (6) being fixedly mounted on the left side of the open fumigation gas box body (4), the inner part of the first limiting block (6) being threadedly connected to the second screw rod (5), and the second screw rod (5) being threadedly connected to the threaded hole (36) and the second threaded groove (20) respectively.

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