A corn disease and pest detection sample collection device

Abstract

The application discloses a corn disease and pest detection sample collecting device and relates to the technical field of sample collecting devices.The device comprises a sample box, a positioning shaft, a ventilation plate, a ventilation hole, an exhaust port, a lifting baffle and an opening and closing mechanism.The opening and closing mechanism is arranged to drive the blocking mechanism to cover and block the opening of the ventilation hole by the lifting assembly, so that the cold air in the liquid nitrogen cannot continue to cool the test tube, the excess cold air is discharged outward through the exhaust port, and the cold air in the sample box cannot cause frostbite of the user's hands.When the test tube containing the sample is placed in the sample box, the sealing rotating plate is rotated around the rotating shaft to be reset, the positioning shaft is locked and fixed through the cooperation of the lifting assembly and the positioning assembly, the above operation is reversely operated, the test tube containing the sample can be cooled by the liquid nitrogen, and the sample storage efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sample collection devices, in particular to a corn disease and pest detection sample collection device. BACKGROUND

[0002] Bacteria, fungi and viruses are the main causes of crop diseases (for example: corn, etc.), most of which are easy to prevent and control at the early stage of disease, but are difficult to be discovered by people. When the disease occurs, the crops are already in the late stage of disease, making it difficult and ineffective to prevent and control, directly leading to crop yield reduction or even complete loss. In order to effectively avoid the inability to treat crops in time, it is necessary to collect and detect the branches, leaves, fruits, roots and stems of crops. When collecting and detecting corn, the epidermis of the corn heart leaf is usually torn off and observed under an electron microscope.

[0003] During the collection and detection process, corn in multiple places usually needs to be collected and the collected samples need to be stored centrally, and then transported to a detection center for detection. During transportation, the samples need to be refrigerated by cold air to avoid shrinkage during transportation. The existing refrigeration method usually uses liquid nitrogen and a refrigerator. Due to the large number of collection sites, the collection time is usually too long, so liquid nitrogen is usually used to refrigerate the samples. However, during use, the user's hands are often frozen due to the low temperature of the liquid nitrogen. If this phenomenon is avoided, the hands need to be protected from freezing, so that the samples cannot be efficiently stored. In order to avoid freezing the user's hands and further improve the storage efficiency of the samples, a corn disease and pest detection sample collection device is provided. SUMMARY

[0004] The purpose of the present application is to avoid freezing the user's hands and further improve the storage efficiency of the samples, and to provide a corn disease and pest detection sample collection device.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a corn disease and pest detection sample collection device, comprising a sample box rotatably connected at one end by a rotating shaft to a sealing rotating plate, both sides of the sealing rotating plate are fixedly connected with positioning clamping shafts, the inside of the sample box is fixedly connected with a ventilation plate, a plurality of ventilation holes are horizontally and equidistantly formed on the ventilation plate, both sides of the sample box are provided with exhaust ports, and lifting baffles are slidingly connected inside both sides of the sample box.

[0006] The opening and closing mechanism comprises: a lifting assembly, a positioning assembly;

[0007] Two positioning assemblies are arranged at the upper ends of the two sides of the sample box respectively, and are used for sleeving and limiting the positioning shafts;

[0008] Two lifting assemblies are vertically arranged on the outer walls of the two sides of the sample box respectively, and are used for driving the lifting baffle to slide up and down and clamping and locking the positioning assembly;

[0009] A blocking mechanism is transversely arranged in the sample box and in contact with the upper surface of the aeration plate, and is used for blocking the aeration hole.

[0010] As a further scheme of the present application, the positioning assembly comprises:

[0011] Two positioning sleeve plates are arranged at the upper ends of the two sides of the sample box respectively, one end of the positioning sleeve plate is rotationally connected with a connecting rotating shaft through a rotating groove, a rotating pressing plate in contact with the outer wall of the positioning sleeve plate is fixedly connected to the outer wall of the connecting rotating shaft, torsion springs are sleeved on the outer walls of the two sides of the connecting rotating shaft, the two ends of the torsion springs are clamped with the inner wall of the positioning sleeve plate and the outer wall of the rotating pressing plate respectively, and the inner wall of the positioning sleeve plate and the outer wall of the rotating pressing plate are both formed with hole grooves for inserting the ends of the torsion springs;

[0012] A limiting sliding plate is formed on one side of the positioning sleeve plate, the outer wall of the limiting sliding plate is T-shaped, a straight sliding groove for the transverse sliding of the limiting sliding plate is formed on the sample box, a first return spring is arranged at one end of the limiting sliding plate, the two ends of the first return spring are in contact with the outer wall of the limiting sliding plate and the inner wall of the sample box respectively, and a moving push block is integrally formed at the bottom end of the positioning sleeve plate.

[0013] As a further scheme of the present application, the lifting assembly comprises:

[0014] A connecting pull block is fixedly connected to one side of the lifting baffle, a rack is fixedly connected to the side of the connecting pull block away from the lifting baffle, the outer wall of the rack is in contact with the outer wall of the sample box, a second return spring is arranged on the lower surface of the connecting pull block, and the two ends of the second return spring are in contact with the outer wall of the connecting pull block and the inner wall of the sample box respectively;

[0015] A pressing push plate is fixedly connected to the top end of the rack, the pressing push plate is clamped and connected with the moving push block, and a locking insertion rod is fixedly connected to the top end of the pressing push plate.

[0016] As a further scheme of the present application, the blocking mechanism comprises:

[0017] A plurality of rotating cover plates are arranged equidistantly in the transverse direction inside the sample box and in contact with the upper surface of the aeration plate, both sides of the plurality of rotating cover plates are fixedly connected with transmission wheels through connecting shafts, the outer wall of the transmission wheels is engaged with a synchronous belt, the lower end of both sides of the sample box is provided with two gears in contact with the outer wall of the rack, the outer wall of the rack is shaped with a tooth block that is engaged with the gear, and the two gears are fixedly connected with the two transmission wheels on one rotating cover plate through connecting shafts respectively;

[0018] An engagement pressing plate is arranged at one end of the rack and engaged with the gear, one end of the engagement pressing plate away from the gear is fixedly connected with a limiting slide shaft, the outer wall of the limiting slide shaft is sleeved with a positioning sleeve fixedly connected with the sample box, the outer wall of the limiting slide shaft is sleeved with a third return spring, and both ends of the third return spring are in contact with the outer wall of the engagement pressing plate and the positioning sleeve respectively.

[0019] As a further scheme of the present application, the two ends of the lifting baffle are integrally formed with linear sliding plates, and the sample box is provided with lifting sliding grooves for the lifting of the linear sliding plates.

[0020] As a further scheme of the present application, the inner wall of the exhaust port is shaped with two fixed guide plates in contact with the outer walls of both ends of the connecting pull block respectively, and a dustproof screen is installed inside the exhaust port and located at one end of the fixed guide plate away from the connecting pull block.

[0021] As a further scheme of the present application, the upper surface of one end of the rotating pressing plate away from the positioning sleeve plate is inclined, and the positioning sleeve plate is provided with a positioning sleeve groove in contact with the outer wall of the positioning shaft.

[0022] As a further scheme of the present application, the top end of the locking plug rod is in the shape of a circular truncated cone, the top end of the locking plug rod is provided with a ball, and the positioning sleeve plate and the positioning shaft are both provided with locking plug grooves for the insertion of the locking plug rod.

[0023] As a further scheme of the present application, the lower surface of one end of the pressing push plate is inclined, the outer wall of one end of the moving push block is provided with a pressing surface in contact with the outer wall of the pressing push plate, and the moving push block is provided with a butt joint slot for the insertion of the pressing push plate.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] By setting up an opening and closing mechanism, the lifting component drives the blocking mechanism to contact the upper surface of the vent plate, covering and blocking the opening of the vent hole. This effectively prevents the cold air in the liquid nitrogen inside the storage chamber from continuing to refrigerate the test tubes. Excess cold air is discharged out through the exhaust port, thus preventing the cold air in the sample box from causing frostbite to the user's hands. When the test tube containing the sample is placed inside the sample box, the sealing plate is rotated around the pivot to reset. At the same time, the lifting component and the positioning component work together to easily lock the positioning pin. The above operation can be reversed, allowing the test tube containing the sample to be refrigerated with liquid nitrogen, thereby further improving the efficiency of sample storage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the sample box of the present invention;

[0028] Figure 3 This is a schematic diagram of the connection structure between the opening / closing mechanism and the blocking mechanism of the present invention;

[0029] Figure 4 This is a schematic diagram of the connection structure between the sample box and the ventilation plate of the present invention;

[0030] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the diagram;

[0031] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in the diagram;

[0032] Figure 7 For the present invention Figure 2 A magnified schematic diagram of the structure at point C.

[0033] In the diagram: 1. Sample box; 2. Opening and closing mechanism; 201. Moving push block; 202. Locking rod; 203. Positioning sleeve; 204. Rotating pressure plate; 205. Limiting slide plate; 206. Pressing push plate; 207. Rack; 208. Connecting pull block; 209. Torsion spring; 2010. Connecting shaft; 2011. First return spring; 2012. Second return spring; 2013. Fixed guide plate; 3. Blocking mechanism; 301. Synchronous belt; 302. Transmission wheel; 303. Rotating cover plate; 304. Gear; 305. Meshing pressure plate; 306. Third return spring; 307. Positioning sleeve; 308. Limiting slide shaft; 4. Sealing rotating plate; 5. Positioning retaining shaft; 6. Vent plate; 7. Exhaust port; 8. Lifting baffle; 9. Vent hole. Detailed Implementation

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0035] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "arranging" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments of the present application will be described below according to the overall structure of the present application.

[0036] Please refer to Figures 1-7 In the embodiments of the present application, a corn disease and pest detection sample collection device comprises a sample box 1 rotatably connected at one end by a rotating shaft with a sealing rotating plate 4, the two sides of the sealing rotating plate 4 are fixedly connected with positioning clamping shafts 5, the inside of the sample box 1 is fixedly connected with a ventilation plate 6, a plurality of ventilation holes 9 are horizontally and equidistantly formed on the ventilation plate 6, exhaust ports 7 are formed on the two sides of the sample box 1, lifting baffles 8 are slidingly connected inside the two sides of the sample box 1, the lifting baffles 8 are located on one side of the exhaust ports 7, the two ends of the lifting baffles 8 are integrally formed with linear slides, lifting grooves are formed on the sample box 1 for the lifting of the linear slides, opening and closing mechanisms 2 are arranged on the two sides of the sample box 1, the opening and closing mechanisms 2 are used for the connection and fixation of the sample box 1 and the sealing rotating plate 4, and drive the lifting baffles 8 to block the exhaust ports 7;

[0037] The opening and closing mechanism 2 comprises a lifting assembly and a positioning assembly.

[0038] The two positioning assemblies arranged respectively on the upper ends of the two sides of the sample box 1 are used for sleeving and limiting the positioning clamping shafts 5;

[0039] Two lifting assemblies vertically arranged on the two outer walls of the sample box 1 respectively, used for driving the lifting baffle 8 to slide up and down and clamping and locking the positioning assembly;

[0040] The blocking mechanism 3 is transversely arranged in the sample box 1 and in contact with the upper surface of the air passage plate 6, and is used for blocking the air passage hole 9.

[0041] In the embodiment, when the device is used, the blocking mechanism 3 is in contact with the upper surface of the air passage plate 6 and covers and blocks the opening of the air passage hole 9 through the lifting assembly, so that the cold gas in the liquid nitrogen in the storage cavity is effectively prevented from continuing to be refrigerated to the test tube, and the sample box 1 is used to discharge the excess cold gas to the outside through the exhaust port 7, so as to prevent the cold gas in the sample box 1 from causing frostbite to the user's hands;

[0042] When the test tube storing the sample is placed in the sample box 1, the sealing rotating plate 4 is rotated around the rotating shaft, the positioning clamp shaft 5 is conveniently locked through the cooperation of the lifting assembly and the positioning assembly, and the above operation is reversed, so that the test tube storing the sample is refrigerated by the liquid nitrogen, and the sealing rotating plate 4 is effectively prevented from being automatically rotated and opened during transportation.

[0043] As a preferred embodiment of the present application, the positioning assembly comprises:

[0044] Two positioning sleeve plates 203 are arranged on the upper ends of the two sides of the sample box 1 respectively, one end of the positioning sleeve plate 203 is rotatably connected with a connecting rotating shaft 2010 through a rotating groove, the outer wall of the connecting rotating shaft 2010 is fixedly connected with a rotating pressing plate 204 in contact with the outer wall of the positioning sleeve plate 203, the two outer walls of the connecting rotating shaft 2010 are both sleeved with a torsion spring 209, the two ends of the torsion spring 209 are respectively clamped with the inner wall of the positioning sleeve plate 203 and the outer wall of the rotating pressing plate 204, the inner wall of the positioning sleeve plate 203 and the outer wall of the rotating pressing plate 204 are both formed with a hole slot for inserting the end of the torsion spring 209, the upper surface of the end of the rotating pressing plate 204 away from the positioning sleeve plate 203 is beveled, and the positioning sleeve plate 203 is provided with a positioning sleeve groove matching with the outer wall of the positioning clamp shaft 5;

[0045] A limiting sliding plate 205 is formed on one side of the positioning sleeve plate 203, the outer wall of the limiting sliding plate 205 is T-shaped, the sample box 1 is provided with a straight sliding groove for the transverse sliding of the limiting sliding plate 205, one end of the limiting sliding plate 205 is provided with a first reset spring 2011, the two ends of the first reset spring 2011 are respectively in contact with the outer wall of the limiting sliding plate 205 and the inner wall of the sample box 1, and the bottom end of the positioning sleeve plate 203 is integrally formed with a moving push block 201;

[0046] The lifting assembly comprises:

[0047] The connecting pull block 208 fixedly connected to one side of the lifting baffle 8, the inner wall of the exhaust port 7 is formed with two fixed guide plates 2013 in contact with the outer walls of the two ends of the connecting pull block 208, a dust screen is installed at the inner part of the exhaust port 7 and away from the one end of the fixed guide plate 2013, the side of the connecting pull block 208 away from the lifting baffle 8 is fixedly connected with a rack 207, the outer wall of the rack 207 is in contact with the outer wall of the sample box 1, the lower surface of the connecting pull block 208 is provided with a second reset spring 2012, the two ends of the second reset spring 2012 are in contact with the outer wall of the connecting pull block 208 and the inner wall of the sample box 1 respectively;

[0048] The pressing push plate 206 fixedly connected to the top end of the rack 207, the pressing push plate 206 is clamped and connected with the moving push block 201, the top end of the pressing push plate 206 is fixedly connected with a locking plug 202, the one end of the lower surface of the pressing push plate 206 is beveled, the outer wall of the one end of the moving push block 201 is provided with an extrusion surface matched with the outer wall of the pressing push plate 206, and the moving push block 201 is provided with a butt joint slot for plug-in connection of the pressing push plate 206.

[0049] In the embodiment: by pressing the two pressing push plates 206 to descend synchronously, in this process, the rack 207 is driven to descend along the inner wall of the sample box 1 by the connecting pull block 208 under the pushing of the pressing push plate 206, at this time, the connecting pull block 208 extrudes and shrinks the second reset spring 2012 along the outer wall of the two fixed guide plates 2013, so that the sample box 1 can discharge the excess cold air outward through the exhaust port 7, so as to avoid the case that the cold air in the sample box 1 causes frostbite to the hands of the user;

[0050] At the same time, the locking plug 202 is separated from the positioning clamping shaft 5 and the positioning sleeve plate 203 in sequence under the driving of the pressing push plate 206, until the outer wall of the pressing push plate 206 is in contact with the extrusion surface of the moving push block 201, at this time, the moving push block 201 is separated from the positioning clamping shaft 5 under the extrusion of the pressing push plate 206, at the same time, the positioning sleeve plate 203 slides transversely along the inner wall of the sample box 1 and extrudes and shrinks the first reset spring 2011, when the pressing push plate 206 moves until the end of the butt joint slot, at this time, the first reset spring 2011 pushes the positioning sleeve plate 203 to make the moving push block 201 and the pressing push plate 206 plug-in connected, so that the pressing push plate 206 can clamp and limit the moving push block 201;

[0051] Afterwards, the sealing rotating plate 4 is rotated with the rotating shaft as the axis, and the positioning clamping shaft 5 is extruded by the sealing rotating plate 4, at this time, the rotating pressing plate 204 is rotated with the connecting rotating shaft 2010 as the axis, and the torsion spring 209 is twisted, when the positioning clamping shaft 5 is completely separated from the outer wall of the rotating pressing plate 204, at this time, the torsion spring 209 drives the rotating pressing plate 204 to rotate and reset through the torsion rebound, so that the refrigerated test tube can be taken out or put into the test tube storing the sample from the inside of the sample box 1;

[0052] Then, the sealing rotating plate 4 is rotated with the rotating shaft as the axis to reset, at this time, the positioning clamping shaft 5 is extruded by the sealing rotating plate 4 to the inclined outer wall of the rotating pressing plate 204, at this time, the rotating pressing plate 204 cannot rotate under the block of the positioning sleeve plate 203, and the positioning sleeve plate 203 drives the limiting sliding plate 205 to slide along the inner wall of the sample box 1 under the push of the rotating pressing plate 204, and extrudes the first reset spring 2011 to shrink, and drives the moving push block 201 and the outer wall of the pressing push plate 206 to separate from each other, when the pressing push plate 206 and the moving push block 201 are completely separated, at this time, the second reset spring 2012 drives the connecting pull block 208 to drive the lifting baffle 8 to rise through the rebound, until the locking plug 202 is in contact with the lower surface of the positioning sleeve plate 203 through the ball, and the first reset spring 2011 drives the positioning sleeve plate 203 to sleeve the positioning clamping shaft 5 through the rebound of the limiting sliding plate 205, in this process, the positioning sleeve plate 203 moves to move the port of the locking slot to the upper side of the locking plug 202, at this time, the second reset spring 2012 drives the locking plug 202 to penetrate the positioning sleeve plate 203 to the inside of the positioning clamping shaft 5 through the rebound, so that the positioning sleeve plate 203 and the positioning clamping shaft 5 can be conveniently locked to avoid the automatic rotation and opening of the sealing rotating plate 4 during transportation.

[0053] As a preferred embodiment of the present application, the blocking mechanism 3 comprises:

[0054] A plurality of rotating cover plates 303 are transversely and equidistantly arranged in the inside of the sample box 1 and in contact with the upper surface of the aeration plate 6, the two sides of the plurality of rotating cover plates 303 are fixedly connected with transmission wheels 302 through connecting shafts, the outer wall of the transmission wheel 302 is engaged with a synchronous belt 301, the lower end of the two sides of the sample box 1 is provided with two gears 304 in contact with the outer wall of the rack 207, the outer wall of the rack 207 is formed with a tooth block engaged with the gear 304, and the two gears 304 are fixedly connected with the two transmission wheels 302 on one rotating cover plate 303 through connecting shafts;

[0055] The meshing pressing plate 305 is arranged at one end of the rack 207 and is in meshing connection with the gear 304. The end of the meshing pressing plate 305 away from the gear 304 is fixedly connected with a limiting sliding shaft 308. The outer wall of the limiting sliding shaft 308 is sleeved with a positioning sleeve 307 fixedly connected with the sample box 1. The outer wall of the limiting sliding shaft 308 is sleeved with a third return spring 306. The two ends of the third return spring 306 are in contact with the outer wall of the meshing pressing plate 305 and the positioning sleeve 307 respectively.

[0056] In the embodiment, by pressing the two pressing push plates 206 to synchronously descend, in the process, the rack 207 is driven to rotate by the pressing push plates 206. In the process, the meshing pressing plate 305 is moved along the outer wall of the sample box 1 by the meshing extrusion of the gear 304, and the limiting sliding shaft 308 is moved along the inner wall of the positioning sleeve 307. At the same time, the meshing pressing plate 305 is contracted by moving and extruding the third return spring 306. When the next tooth groove of the gear 304 moves to the end of the meshing pressing plate 305, the third return spring 306 drives the meshing pressing plate 305 to mesh with the gear 304 by rebounding, so as to limit the rotation of the gear 304.

[0057] At this time, one transmission wheel 302 drives one rotating cover plate 303 to rotate by the driving of the gear 304 through the connecting shaft. At the same time, the remaining transmission wheels 302 are synchronously rotated by the meshing driving of one transmission wheel 302 through the synchronous belt 301. At this time, the plurality of rotating cover plates 303 are synchronously rotated by the driving of the transmission wheels 302. Until the outer wall of the plurality of rotating cover plates 303 is in contact with the upper surface of the ventilation plate 6, and the opening of the ventilation hole 9 is covered and blocked, the cold gas in the liquid nitrogen in the storage cavity is effectively prevented from continuing to be refrigerated to the test tube.

[0058] When the sample box 1 is locked and fixed with the positioning clamping shaft 5, the above operation is reversed. The test tube storing the sample can be refrigerated by the liquid nitrogen, so as to transport the sample.

[0059] As a preferred embodiment of the application, the top end of the locking insertion rod 202 is in the shape of a circular truncated cone. The top end of the locking insertion rod 202 is provided with a ball. The positioning sleeve plate 203 and the positioning clamping shaft 5 are both provided with a locking insertion slot for inserting the locking insertion rod 202.

[0060] In the embodiment, the ball can reduce the friction between the locking insertion rod 202 and the positioning sleeve plate 203. At the same time, the outer wall in the shape of a circular truncated cone can effectively enable the locking insertion rod 202 to be precisely inserted into the locking insertion slot.

[0061] The working principle of the present application is: need special explanation: the both ends of the sample box 1 are internally shaped with support baffle, the upper surface of the support baffle is provided with sponge pad in contact with the inner wall of the sample box 1, the sponge pad is used for buffering and placing the test tube, and the inside of the sample box 1 is divided by the ventilation plate 6, the inside of the sample box 1 below the ventilation plate 6 forms a storage cavity for storing liquid nitrogen;

[0062] When the device is used, the two pressing push plates 206 are pressed to descend synchronously, in the process, the rack 207 is engaged to drive the gear 304 to rotate under the pushing of the pressing push plate 206, in the process, the engagement pressing plate 305 moves along the outer wall of the sample box 1 under the engagement and extrusion of the gear 304, and the limiting sliding shaft 308 moves along the inner wall of the positioning sleeve 307, at the same time, the engagement pressing plate 305 is extruded and retracted through the limiting sliding plate 205, and the first reset spring 2011 is extruded and retracted, when the next tooth groove of the gear 304 moves to the end of the engagement pressing plate 305, the third reset spring 306 is pushed to engage the engagement pressing plate 305 with the gear 304 through rebounding, so as to limit the rotation of the gear 304;

[0063] At this time, one transmission wheel 302 drives one rotating cover plate 303 to rotate under the driving of the gear 304 through the connecting shaft, and the remaining transmission wheels 302 are synchronously rotated under the engagement and driving of one transmission wheel 302 through the synchronous belt 301, at this time, the plurality of rotating cover plates 303 are synchronously rotated under the driving of the transmission wheel 302, until the outer wall of the plurality of rotating cover plates 303 is in contact with the upper surface of the ventilation plate 6, and the opening of the ventilation hole 9 is covered and blocked, effectively avoiding the cold gas in the liquid nitrogen in the storage cavity from continuing to refrigerate the test tube, at the same time, the connecting pull block 208 drives the lifting baffle 8 to descend along the inner wall of the sample box 1, at this time, the connecting pull block 208 extrudes and retracts the second reset spring 2012 along the outer wall of the two fixed guide plates 2013, so that the sample box 1 can exhaust the excess cold gas to the outside through the exhaust port 7, so as to avoid the cold gas in the sample box 1 from causing frostbite to the hands of the user;

[0064] At the same time, the locking rod 202 is separated from the positioning shaft 5 and the positioning sleeve plate 203 in sequence under the driving of the pressing push plate 206, until the inclined outer wall of the pressing push plate 206 is in contact with the extrusion surface of the moving push block 201, at this time, the moving push block 201 is separated from the positioning shaft 5 under the extrusion of the pressing push plate 206, at the same time, the positioning sleeve plate 203 slides transversely along the inner wall of the sample box 1 through the limiting sliding plate 205, and extrudes and retracts the first reset spring 2011, when the pressing push plate 206 moves until the end of the butt joint slot, at this time, the first reset spring 2011 pushes the positioning sleeve plate 203 to make the moving push block 201 and the pressing push plate 206 be inserted, so that the pressing push plate 206 can clamp and limit the moving push block 201.

[0065] After the rotation shaft as the axis drives the sealing rotating plate 4 to flip, the positioning clamping shaft 5 is driven by the sealing rotating plate 4 to press the rotating pressing plate 204, at this time, the rotating pressing plate 204 rotates around the connecting rotation shaft 2010 and twists the torsion spring 209, when the positioning clamping shaft 5 and the outer wall of the rotating pressing plate 204 are completely separated, at this time, the torsion spring 209 drives the rotating pressing plate 204 to rotate and reset through the torsion rebound, so that the refrigerated test tube can be taken out or put into the test tube storing the sample from the inside of the sample box 1;

[0066] Then, the sealing rotating plate 4 is rotated around the rotation shaft to reset, at this time, the positioning clamping shaft 5 is pressed by the sealing rotating plate 4 to the inclined outer wall of the rotating pressing plate 204, at this time, the rotating pressing plate 204 cannot rotate under the block of the positioning sleeve plate 203, at the same time, the positioning sleeve plate 203 drives the limiting sliding plate 205 to slide along the inner wall of the sample box 1 under the push of the rotating pressing plate 204, and the first reset spring 2011 is pressed to shrink, at the same time, the moving push block 201 and the outer wall of the pressing push plate 206 are separated, when the pressing push plate 206 and the moving push block 201 are completely separated, at this time, the second reset spring 2012 drives the connecting pull block 208 to drive the lifting baffle 8 to rise through the rebound, until the locking plug 202 is in contact with the lower surface of the positioning sleeve plate 203, at the same time, the first reset spring 2011 drives the limiting sliding plate 205 to make the positioning sleeve plate 203 sleeve the positioning clamping shaft 5, in this process, the positioning sleeve plate 203 moves to make the port of the locking slot move above the locking plug 202, at this time, the second reset spring 2012 makes the locking plug 202 penetrate the positioning sleeve plate 203 to the inside of the positioning clamping shaft 5 through the rebound, so that the positioning sleeve plate 203 and the positioning clamping shaft 5 can be conveniently locked, and the above operation is reversed, the test tube storing the sample can be refrigerated by liquid nitrogen, and the storage efficiency of the sample is further improved, and the automatic rotation opening of the sealing rotating plate 4 in the transportation process is effectively avoided.

[0067] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A corn disease and pest detection sample collection device, comprising a sample box (1) with a sealing rotating plate (4) rotatably connected at one end by a rotating shaft, both sides of the sealing rotating plate (4) are fixedly connected with positioning clamping shafts (5), the inside of the sample box (1) is fixedly connected with a ventilation plate (6), a plurality of ventilation holes (9) are horizontally and equidistantly formed on the ventilation plate (6), both sides of the sample box (1) are provided with exhaust ports (7), and lifting baffles (8) are slidingly connected on the inside of both sides of the sample box (1) in an up-down manner, the lifting baffles (8) are located on one side of the exhaust ports (7), characterized in that, Both sides of the sample box (1) are provided with opening and closing mechanisms (2), which are used for connecting and fixing the sample box (1) and the sealing rotating plate (4), and driving the lifting baffle (8) to block the exhaust port (7); The opening and closing mechanism (2) comprises a lifting assembly and a positioning assembly; Two positioning assemblies are respectively arranged at the upper ends of the two sides of the sample box (1) and are used for sleeving and limiting the positioning shaft (5); Two lifting assemblies are vertically arranged on the outer walls of the two sides of the sample box (1) and are used for driving the lifting baffle (8) to slide up and down and clamping and locking the positioning assembly; A blocking mechanism (3) is horizontally arranged in the sample box (1) and is in contact with the upper surface of the ventilation plate (6), and the blocking mechanism (3) is used for blocking the ventilation hole (9); The lifting assembly comprises: A connecting pull block (208) is fixedly connected to one side of the lifting baffle (8), a rack (207) is fixedly connected to the side of the connecting pull block (208) away from the lifting baffle (8), the outer wall of the rack (207) is in contact with the outer wall of the sample box (1), and a second reset spring (2012) is arranged on the lower surface of the connecting pull block (208), and the two ends of the second reset spring (2012) are in contact with the outer wall of the connecting pull block (208) and the inner wall of the sample box (1) respectively; A pressing push plate (206) is fixedly connected to the top end of the rack (207), the pressing push plate (206) is clamped and connected with the moving push block (201), and the top end of the pressing push plate (206) is fixedly connected with a locking plug rod (202); The blocking mechanism (3) comprises: A plurality of rotating cover plates (303) are horizontally and equidistantly arranged in the sample box (1) and are in contact with the upper surface of the ventilation plate (6), a transmission wheel (302) is fixedly connected to the two sides of each rotating cover plate (303) through a connecting shaft, a synchronous belt (301) is engaged and sleeved on the outer wall of the transmission wheel (302), two gears (304) are arranged at the lower ends of the two sides of the sample box (1) and are in contact with the outer wall of the rack (207), the outer wall of the rack (207) is formed with a tooth block that is engaged with the gear (304), and the two gears (304) are fixedly connected with the two transmission wheels (302) on one rotating cover plate (303) through connecting shafts; An engagement pressing plate (305) is arranged at one end of the rack (207) and is engaged with the gear (304), one end of the engagement pressing plate (305) away from the gear (304) is fixedly connected with a limiting sliding shaft (308), the outer wall of the limiting sliding shaft (308) is sleeved with a positioning sleeve (307) fixedly connected with the sample box (1), the outer wall of the limiting sliding shaft (308) is sleeved with a third reset spring (306), and the two ends of the third reset spring (306) are in contact with the outer walls of the engagement pressing plate (305) and the positioning sleeve (307) respectively; The positioning assembly comprises: Two positioning sleeve plates (203) are arranged at the upper ends of the two sides of the sample box (1), one end of the positioning sleeve plate (203) is rotationally connected with a connecting rotating shaft (2010) through a rotating groove, the outer wall of the connecting rotating shaft (2010) is fixedly connected with a rotating pressing plate (204) in contact with the outer wall of the positioning sleeve plate (203), the outer walls of the two sides of the connecting rotating shaft (2010) are sleeved with torsion springs (209), the two ends of the torsion spring (209) are respectively clamped with the inner wall of the positioning sleeve plate (203) and the outer wall of the rotating pressing plate (204), and the inner wall of the positioning sleeve plate (203) and the outer wall of the rotating pressing plate (204) are both formed with a hole groove for inserting the end of the torsion spring (209). A limiting sliding plate (205) is formed on one side of the positioning sleeve plate (203), the outer wall of the limiting sliding plate (205) is T-shaped, a straight sliding groove is formed in the sample box (1) for the transverse sliding of the limiting sliding plate (205), one end of the limiting sliding plate (205) is provided with a first return spring (2011), the two ends of the first return spring (2011) are respectively in contact with the outer wall of the limiting sliding plate (205) and the inner wall of the sample box (1), and the bottom end of the positioning sleeve plate (203) is integrally formed with a moving push block (201).

2. The corn plant disease and pest detection sample collection device of claim 1, wherein, The two ends of the lifting baffle (8) are integrally formed with straight sliding plates, and the sample box (1) is provided with lifting sliding grooves for lifting the straight sliding plates.

3. The corn plant disease and pest detection sample collection device of claim 2, wherein, The inner wall of the exhaust port (7) is formed with two fixed guide plates (2013) in contact with the outer walls of the two ends of the connecting pull block (208), and a dust screen is installed in the exhaust port (7) and located at the end of the fixed guide plate (2013) away from the connecting pull block (208).

4. The corn plant disease and pest detection sample collection device of claim 2, wherein, The upper surface of the end of the rotating pressing plate (204) away from the positioning sleeve plate (203) is inclined, and the positioning sleeve plate (203) is provided with a positioning sleeve groove in contact with the outer wall of the positioning clamping shaft (5).

5. The corn plant disease and pest detection sample collection device of claim 2, wherein, The top end of the locking insertion rod (202) is in the shape of a circular truncated cone, the top end of the locking insertion rod (202) is provided with a ball, and the positioning sleeve plate (203) and the positioning clamping shaft (5) are both provided with locking insertion grooves for inserting the locking insertion rod (202).

6. The corn plant disease and pest detection sample collection device of claim 3, wherein, The lower surface of one end of the pressing push plate (206) is inclined, the outer wall of one end of the moving push block (201) is provided with a pressing surface in contact with the outer wall of the pressing push plate (206), and the moving push block (201) is provided with a butt joint slot for inserting the pressing push plate (206).

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