A polygala seed sucking machine

Abstract

The present invention discloses a polygala seed suction machine, comprising a tank, an air pump, a seed suction tube, and a drag ball. The tank is divided into a negative pressure chamber and a collection chamber by a filter structure. The air pump sucks air from the negative pressure chamber and discharges it into the atmosphere. The seed suction tube connects the collection chamber and the drag ball and extends vertically to the ground. The drag ball constantly slides along the ground and sucks the medicinal seeds on the ground through the seed suction holes. As the tank moves, the drag ball is dragged and slid along the ground, and the seed suction tube naturally bends along the undulations of the ground, allowing the drag ball to always adhere to the ground. This allows the device to absorb scattered medicinal seeds on the ground without requiring a large suction force. When the seed suction tube and the drag ball come into contact with the medicinal seedlings, the seed suction tube naturally bends, and the drag ball slides to the side, allowing the seed suction tube and the drag ball to automatically avoid the medicinal seedlings, thus preventing damage to the medicinal seedlings.

Description

Technical Field

[0001] The invention relates to the field of collecting fruits fallen on the ground, and in particular to a polygala seed sucking machine. Background Art

[0002] The related technology of a polygala seed sucking machine to which the subject matter disclosed in the present invention relates is disclosed in:

[0003] Chinese Patent Publication No. CN107360797A discloses a backpack electric seed sucking machine.

[0004] Chinese patent publication number CN214800884U discloses a mobile seed sucking machine.

[0005] When collecting seeds of perennial medicinal herbs such as Polygala tenuifolia and Gelsemium elegans, most people use vacuum suction. A hose is used to suck the seeds that fall naturally after maturity from the ground, and the seeds are collected into a jar through air power.

[0006] At present, the working principle of the Polygala seed sucking machine is basically the same as the above-mentioned related technologies. A collection tank is connected to multiple hoses. People use the Polygala seed sucking machine mostly using the following two different working methods:

[0007] 1. Place the Polygala seed harvester on a cart. One person pushes the cart while five or six other people, each holding a hose, lie prone on the ground and suck out the seeds. This method has the advantages of high collection efficiency, few missed seeds, and little damage to the Polygala seedlings. However, it is labor-intensive and labor costs are high.

[0008] Second, place the Polygala seed harvester on a cart, and one person is responsible for pushing the cart. The multiple hoses of the Polygala seed harvester are fixed to the front of the cart with wire. Since the hoses cannot move, they must have sufficient suction to suck up the seeds when they are moved to the depressions on the ground. However, if the suction is too strong, it is easy to damage the seedlings, and if the suction is too weak, the seeds cannot be sucked up. Therefore, this method has the disadvantages of low collection efficiency, easy omission, and easy damage to the seedlings. Summary of the Invention

[0009] The purpose of the present invention is to provide a polygala seed sucking machine to solve the defects of the existing seed sucking machine, such as low flexibility of the suction end, inability to adapt to the undulations of the ground, easy omission of seeds and damage to seedlings, and need for manual assistance.

[0010] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0011] A polygala seed suction machine comprises: a tank body, comprising a filter structure disposed inside the tank body, the filter structure dividing the tank body into a negative pressure chamber and a collection chamber; an air pump, comprising an air suction end and an exhaust end, the air suction end being connected to the negative pressure chamber, and the exhaust end being connected to the atmosphere; a seed suction pipe, comprising a seed suction end and a seed discharge end, the seed suction end being vertical to the ground, and the seed discharge end being connected to the collection chamber; the seed suction pipe is at least partially flexible, the seed suction end being connected to a towing ball, the towing ball being provided with a seed suction hole passing through the towing ball and connected to the seed suction end, the seed suction pipe having a length that can extend to the ground, and the towing ball having a weight that causes the seed suction end to always be vertical to the ground.

[0012] Furthermore, the towing ball is a hollow shell, and the interior is filled with a ballast.

[0013] Furthermore, the counterweight is liquid, and the ratio of the volume of the counterweight to the volume of the towing ball satisfies the following condition: when the towing ball is towed, the counterweight inside the towing ball can generate shaking that causes the towing ball to vibrate disorderly.

[0014] Furthermore, the towing ball is symmetrical about the center of the ball, the seed suction holes are evenly distributed around the center of the towing ball, the center of the towing ball forms a central cavity connected to each of the seed suction holes, and the seed suction tube is fixedly connected to one of the seed suction holes.

[0015] Furthermore, the seed sucking end is connected to the seed sucking hole through a connecting part, and the connecting part includes: a first connecting piece, which is inserted into the interior of the seed sucking hole and abuts the inner wall of the central cavity; a second connecting piece, which is inserted into the interior of the seed sucking hole and abuts the outer wall of the towing ball, and the first connecting piece and the second connecting piece are detachably connected, and at least one of the first connecting piece and the second connecting piece abuts the inner wall of the seed sucking hole; a through hole, which passes through the first connecting piece and the second connecting piece, and connects the outside of the towing ball and the inside of the central cavity.

[0016] Furthermore, the collection chamber is connected to the seed suction tube through a suction tube, the seed suction tube is inserted into the inner side of the suction tube, and the seed discharge end is slidably connected to the suction tube through a piston. The length of the suction tube satisfies the following conditions: when the piston is located at one end of the suction tube, the towing ball is dragged on the ground; when the piston is located at the other end of the suction tube, the towing ball is suspended in the air.

[0017] Furthermore, the seed suction tube includes a rigid tube and a flexible tube, the rigid tube and the flexible tube are fixedly connected, the rigid tube is fixedly connected to the piston, and the rigid tube is slidably connected to the suction tube, and the flexible tube is fixedly connected to the towing ball.

[0018] Furthermore, the exhaust end of the air pump is connected to an exhaust pipe, and the exhaust pipe is connected to the suction pipe through a pressing valve, and the diameter of the exhaust pipe meets the following conditions: the pressure of the air discharged by the air pump increases when passing through the exhaust pipe; the pressing valve includes a valve core that can move when pressed, and a gas channel is formed inside the valve core, and the gas channel opens or closes with the movement of the valve core; the valve core is located on the sliding track of the piston and can contact the seed discharge end, and when the seed discharge end pushes the valve core to move, one end of the gas channel is connected to the exhaust pipe, and the other end of the gas channel is connected to the seed discharge end, and the air discharged by the air pump through the exhaust pipe enters the inside of the seed suction pipe through the gas channel to generate an impact airflow for cleaning the seed suction pipe and the seed suction hole.

[0019] Furthermore, the valve core is in the shape of a hollow cylinder, and an air inlet hole is provided on the side wall of the valve core near the exhaust pipe, and an exhaust hole is provided on the end face of the valve core near the piston; the press valve includes: a valve shell, including a guide hole connecting the exhaust pipe and the suction pipe, and the valve core is slidingly connected to the guide hole; an elastic member connecting the valve core and the valve shell, and when the elastic member is compressed, it generates an internal force that drives the valve core to move toward the piston; a stop member, fixedly connected to the valve core and makes the valve core always located inside the guide hole, and when the elastic member releases the internal force, the air inlet hole is located inside the guide hole and disconnected from the exhaust pipe.

[0020] Furthermore, the air pump is a pulse air pump.

[0021] Compared with the prior art, this application has the following beneficial effects:

[0022] Provided is a polygala seed sucking machine, wherein a towing ball that is always dragged and moved on the ground is connected to the bottom end of a seed sucking tube, and the medicinal material seeds on the ground are sucked through the seed sucking holes on the towing ball; during the movement of the tank body, the towing ball is dragged and slides on the ground, and the seed sucking tube naturally bends along the undulations of the ground, so that the towing ball is always attached to the ground, thereby being able to absorb the medicinal material seeds scattered on the ground without a large suction force; when the seed sucking tube and the towing ball come into contact with the medicinal material seedlings, the seed sucking tube naturally bends, and the towing ball slides to the side, so that the seed sucking tube and the towing ball can automatically avoid the medicinal material seedlings, thereby avoiding damage to the medicinal material seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0024] Figure 1 A mechanical diagram of an embodiment of the present invention;

[0025] Figure 2 is a three-dimensional schematic diagram of a towing ball and a connecting portion according to an embodiment of the present invention;

[0026] Figure 3 is a schematic front view of a towing ball and a connecting portion according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 Cross-sectional view in the AA direction;

[0028] Figure 5 An assembly diagram of a towing ball and a connecting portion according to an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the connection structure of the seed suction tube, the towing ball, the connecting portion, the suction tube and the pressing valve according to an embodiment of the present invention;

[0030] Figure 7 for Figure 6 The cross-sectional view in the BB direction shows the working condition of the seed sucking machine sucking medicinal material seeds from the ground;

[0031] Figure 8 for Figure 7 A schematic diagram of another working condition, showing the working condition of the seed sucking machine automatically cleaning the seed sucking tube and the drag ball;

[0032] The numbers in the figure represent the following:

[0033] 1-tank body; 11-filtration structure; 12-negative pressure chamber; 13-collection chamber;

[0034] 2-air pump; 21-exhaust pipe;

[0035] 3-seed suction tube; 31-seed suction end; 32-seed discharge end; 33-rigid tube; 34-flexible tube;

[0036] 4- drag ball; 41- seed suction hole; 42- counterweight; 43- central chamber;

[0037] 5-connecting portion; 51-first connecting member; 511-first prism wall; 52-second connecting member; 521-conical flange; 522-second prism wall; 53-through hole;

[0038] 6-suction tube; 61-piston; 62-guide sleeve; 63-manifold;

[0039] 7-press valve; 71-valve core; 711-gas channel; 712-air inlet; 713-exhaust hole; 72-valve housing; 73-elastic member; 74-stop member; 741-annular flange; 742-circlip. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] like Figure 1-5 As shown, an embodiment of a seed sucking machine for perennial medicinal materials is provided to solve the above technical problems.

[0042] Its main structure includes a tank body 1, an air pump 2, a seed suction pipe 3 and a towing ball 4.

[0043] The tank body 1 includes a filter structure 11 disposed inside the tank body 1 , and the filter structure 11 divides the tank body 1 into a negative pressure chamber 12 and a collection chamber 13 ;

[0044] The air pump 2 includes an air suction end and an air exhaust end, wherein the air suction end is connected to the negative pressure chamber 12 and the air exhaust end is connected to the atmosphere;

[0045] The seed suction pipe 3 includes a seed suction end 31 and a seed discharge end 32, the seed suction end 31 is vertical to the ground, and the seed discharge end 32 is connected to the collection chamber 13;

[0046] The seed suction tube 3 is at least partially flexible, the seed suction end 31 is connected to the towing ball 4, and the towing ball 4 is provided with a seed suction hole 41 that passes through the towing ball 4 and is connected to the seed suction end 31. The seed suction tube 3 has a length that can extend to the ground, and the towing ball 4 has a weight that ensures that the seed suction end 31 is always vertical to the ground.

[0047] The filtering structure 11 may be a filter mesh, the pore size of which is smaller than the size of the medicinal material seeds.

[0048] The air pump 2 sucks the air inside the negative pressure chamber 12, causing negative pressure to be generated inside the negative pressure chamber 12 and the collection chamber 13, thereby generating air force that can absorb the medicinal seeds on the ground. The medicinal seeds enter the interior of the towing ball 4 through the seed suction hole 41 and then move to the interior of the collection chamber 13 through the seed suction tube 3.

[0049] The tank body 1 can be moved by a tractor or a cart. During the movement of the tank body 1, the towing ball 4 is dragged and slides on the ground, and the seed suction tube 3 naturally bends along the undulations of the ground so that the towing ball 4 is always attached to the ground, thereby being able to absorb the medicinal seeds scattered on the ground without the need for a large suction force.

[0050] When the seed suction tube 3 and the towing ball 4 come into contact with the medicinal material seedlings, the seed suction tube 3 bends naturally and the towing ball 4 slides to the side, so that the seed suction tube 3 and the towing ball 4 can avoid the medicinal material seedlings by themselves, avoiding damage to the medicinal material seedlings.

[0051] Furthermore, in order to reduce the production cost of the towing ball 4, the towing ball 4 is preferably a hollow plastic structure. However, the hollow plastic structure is light in weight and is difficult to always adhere to the ground on bumpy land.

[0052] To this end, an optional embodiment is provided, such as Figure 4 As shown, its specific structure is described as follows.

[0053] The towing ball 4 is a hollow shell, and the interior is filled with a weight 42 .

[0054] like Figure 5 As shown, the towing ball 4 is made of several special-shaped tees or special-shaped four-way pipes, which are connected by hot melting. Before the last welding, water, sand or soil can be filled into the towing ball 4. After production is completed, the towing ball 4 has the weight to pull the seed-absorbing end 31 so that it is always vertical to the ground.

[0055] Furthermore, the drag ball 4 is always dragged on the ground, and the seed-sucking hole 41 is easily penetrated by dirt, gravel, fallen leaves and other debris.

[0056] To this end, an optional embodiment that can solve the above technical problems is provided, such as Figure 4 As shown, its specific structure is described as follows.

[0057] The weight 42 is liquid, and the ratio of the volume of the weight 42 to the volume of the towing ball 4 satisfies the following condition: when the towing ball 4 is towed, the weight 42 inside it can generate shaking that causes the towing ball 4 to vibrate disorderly.

[0058] For example, half of the cavity inside the towing ball 4 is filled with water, and the other half is air. When the towing ball 4 is dragged on the ground, the water shakes disorderly inside the towing ball 4. The impact of the water flow on the towing ball 4 causes the towing ball 4 to vibrate disorderly, thereby shaking off debris such as soil, gravel, and fallen leaves stuck in the seed suction hole 41.

[0059] Furthermore: This embodiment provides an optional low-cost towing ball 4 structure, such as Figure 4 As shown, its specific structure is described as follows.

[0060] The towing ball 4 is symmetrical about the center of the ball, and the seed suction holes 41 are evenly distributed around the center of the towing ball 4. The center of the towing ball 4 forms a central cavity 43 connected to each seed suction hole 41, and the seed suction tube 3 is fixedly connected to one seed suction hole 41.

[0061] The towing ball 4 is symmetrical about the spherical center, which means that only one set of molds, or multiple sets of molds with the same shape, are needed to produce the towing ball 4, thereby reducing the production cost of the towing ball 4.

[0062] Furthermore, the distance between each seed suction hole 41 and the central cavity 43 is equal, so the suction force of each seed suction hole 41 is equal.

[0063] The seed-sucking end 31 of the seed-sucking tube 3 can be fixedly connected to a seed-sucking hole 41 by a hot-melt connection method, and the connection portion is sealed.

[0064] Furthermore: This embodiment provides an optional connection method between the seed suction tube 3 and the drag ball 4, such as Figure 4 and 5 As shown, its specific structure is described as follows.

[0065] The seed sucking end 31 is connected to the seed sucking hole 41 through the connecting portion 5. The connecting portion 5 includes: a first connecting member 51, which is inserted into the inside of the seed sucking hole 41 and abuts against the inner wall of the central cavity 43;

[0066] The second connecting member 52 is inserted into the seed suction hole 41 and abuts against the outer wall of the drag ball 4. The first connecting member 51 and the second connecting member 52 are detachably connected, and at least one of the first connecting member 51 and the second connecting member 52 abuts against the inner wall of the seed suction hole 41.

[0067] The through hole 53 passes through the first connecting member 51 and the second connecting member 52 , and connects the outside of the towing ball 4 with the inside of the central chamber 43 .

[0068] Specifically, the first connecting member 51 is a conical nut, the second connecting member 52 is a hollow threaded column, the second connecting member 52 is threadedly connected to the first connecting member 51, and the outer wall of the second connecting member 52 forms a conical flange 521 protruding radially outward. The first connecting member 51 and the conical flange 521 clamp the towing ball 4 from two directions respectively, and the first connecting member 51 and the conical flange 521 both abut against the inner wall of the seed suction hole 41.

[0069] The diameter of the smaller end of the first connecting member 51 and the tapered flange 521 is smaller than the diameter of the seed suction hole 41 , and the diameter of the larger end of the first connecting member 51 and the tapered flange 521 is larger than the diameter of the seed suction hole 41 .

[0070] Further, if Figure 2 、 4 5 : A first prism wall 511 is provided at one end of the first connecting member 51 away from the second connecting member 52 . The first prism wall 511 is in the shape of a hexagonal prism, which makes it easy to rotate the first connecting member 51 using an Allen wrench.

[0071] A second prism wall 522 is provided at one end of the second connecting member 52 away from the first connecting member 51 . The second prism wall 522 is in the shape of a hexagonal prism, which facilitates the use of a wrench to rotate the second connecting member 52 so that the first connecting member 51 and the second connecting member 52 are threadedly connected.

[0072] Furthermore, the towing ball 4 is dragged on the ground for a long time and will inevitably be blocked by the soil. Even if the towing ball 4 is repeatedly and disorderly vibrated by filling the water inside it, the soil cannot be prevented from entering the interior of the seed suction tube 3.

[0073] In order to enable the operator to promptly identify which seed suction tube 3 and drag ball 4 are blocked, this embodiment provides a technical solution to the above technical problems, such as Figure 6-8 As shown, its specific structure is described as follows.

[0074] The collecting chamber 13 is connected to the seed suction pipe 3 through the suction pipe 6. The seed suction pipe 3 is inserted into the inner side of the suction pipe 6. The seed discharge end 32 is slidably connected to the suction pipe 6 through the piston 61. The length of the suction pipe 6 satisfies the following conditions: when the piston 61 is located at one end of the suction pipe 6, the drag ball 4 is dragged on the ground;

[0075] When the piston 61 is located at the other end of the suction pipe 6 , the drag ball 4 is suspended in the air.

[0076] The suction pipe 6 can be connected to the collection chamber 13 of the tank body 1 through an air exhaust and a pipeline. The suction pipe 6 is preferably arranged vertically so that the seed suction pipe 3 can hang directly below it, making it convenient for the seed suction pipe 3 to move up and down through the piston 61.

[0077] The negative pressure inside the collecting chamber 13 is transmitted to the seed suction tube 3 and the drag ball 4 through the suction tube 6 , and the medicinal seeds enter the collecting chamber 13 through the seed suction hole 41 , the central chamber 43 , the seed suction tube 3 and the suction tube 6 .

[0078] When the seed suction tube 3 or the towing ball 4 is blocked, the negative pressure inside the suction tube 6 accumulates, causing the piston 61 to move upward. The piston 61 drags the seed suction tube 3 upward, causing the towing ball 4 to leave the ground and hang in the air. The operator can find out which seed suction tube 3 and towing ball 4 are blocked by observing which towing ball 4 is suspended in the air.

[0079] Furthermore, when the tank body 1 is moved by the tractor, the towing ball 4 is dragged on the ground, so the seed suction tube 3 is stretched in the opposite direction of the moving direction of the tank body 1. Since the seed suction tube 3 is suspended inside the suction tube 6 by the piston 61, the seed suction tube 3 applies a force to the piston 61 to make it face the ground and in the opposite direction of the moving direction of the tank body 1. This force causes the piston 61 to have a tendency to flip inside the suction tube 6, which can easily cause air leakage at the connection between the suction tube 6 and the piston 61, affecting the vacuum environment inside the suction tube 6.

[0080] To this end, an optional embodiment is provided, and its specific structure is described as follows.

[0081] The seed suction tube 3 includes a rigid tube 33 and a flexible tube 34 , which are fixedly connected. The rigid tube 33 is fixedly connected to the piston 61 , and is slidingly connected to the suction tube 6 , while the flexible tube 34 is fixedly connected to the towing ball 4 .

[0082] Specifically, the rigid tube 33 is a metal tube, the flexible tube 34 is a plastic tube, and the rigid tube 33 and the flexible tube 34 are connected by hot melting.

[0083] The seed suction end 31 is located at the end of the rigid tube 33 away from the flexible tube 34, and the seed discharge end 32 is located at the end of the flexible tube 34 away from the rigid tube 33. One end of the suction tube 6 is provided with a guide sleeve 62 that is slidably connected to the rigid tube 33. The guide sleeve 62 and the rigid tube 33 work together to form a guide mechanism for guiding the sliding of the piston 61. At the same time, the guide sleeve 62 can also prevent the piston 61 from escaping from the inside of the suction tube 6.

[0084] The force applied by the seed suction tube 3 and the drag ball 4 to the piston 61 to cause it to flip is borne by the guide sleeve 62, so that the piston 61 will not flip.

[0085] Furthermore, if the blockage inside the seed suction tube 3 and the drag ball 4 can be automatically cleared, the working efficiency of the seed suction machine can be greatly improved.

[0086] To this end, an optional embodiment is provided, and its specific structure is described as follows.

[0087] The exhaust end of the air pump 2 is connected to an exhaust pipe 21, which is connected to the suction pipe 6 through a press valve 7. The diameter of the exhaust pipe 21 meets the following conditions: the pressure of the air discharged by the air pump 2 increases when passing through the exhaust pipe 21;

[0088] The press valve 7 includes a valve core 71 that can move when pressed, and a gas channel 711 is formed inside the valve core 71. The gas channel 711 opens or closes as the valve core 71 moves.

[0089] The valve core 71 is located on the sliding track of the piston 61 and can contact the seed discharge end 32. When the seed discharge end 32 pushes the valve core 71 to move, one end of the gas channel 711 is connected to the exhaust pipe 21, and the other end of the gas channel 711 is connected to the seed discharge end 32. The air discharged by the air pump 2 through the exhaust pipe 21 enters the inside of the seed suction tube 3 through the gas channel 711 to generate an impact airflow for cleaning the seed suction tube 3 and the seed suction hole 41.

[0090] Specifically, the piston 61 and the pressing valve 7 are respectively provided at both ends of the suction pipe 6 , and a manifold 63 connected to the collection chamber 13 is opened on the side wall of the suction pipe 6 .

[0091] During the operation of the air pump 2, the air is continuously discharged outward through the exhaust pipe 21. When the seed suction tube 3 and the seed suction hole 41 are blocked, the piston 61 moves toward the valve core 71, and the seed discharge end 32 contacts the valve core 71 and is connected to the gas channel 711. After the valve core 71 moves a certain distance, the gas channel 711 is opened, and the impact airflow recoils the seed suction tube 3 and the drag ball 4, so that the soil blocking the seed suction tube 3 and the seed suction hole 41 is flushed out.

[0092] When the air pump 2 stops working, the interior of the suction pipe 6 loses vacuum, and the piston 61 and the valve core 71 return to their original positions.

[0093] Furthermore, the specific structure of the pressing valve 7 is as follows.

[0094] The valve core 71 is in the shape of a hollow cylinder. An air inlet hole 712 is provided on the side wall of the valve core 71 close to the exhaust pipe 21 , and an exhaust hole 713 is provided on the end surface of the valve core 71 close to the piston 61 .

[0095] The pressing valve 7 includes a valve housing 72, an elastic member 73 and a stopper 74;

[0096] The valve housing 72 includes a guide hole communicating with the exhaust pipe 21 and the suction pipe 6, and the valve core 71 is slidably connected to the guide hole;

[0097] The elastic member 73 connects the valve core 71 and the valve housing 72 . When the elastic member 73 is compressed, it generates an internal force that drives the valve core 71 to move toward the piston 61 .

[0098] The stopper 74 is fixedly connected to the valve core 71 and ensures that the valve core 71 is always located inside the guide hole. When the elastic member 73 releases the internal force, the air inlet 712 is located inside the guide hole and is disconnected from the exhaust pipe 21.

[0099] Specifically, the elastic member 73 is a spring, and the stop member 74 includes an annular flange 741 and a retaining spring 742 respectively arranged at both ends of the valve core 71, wherein the annular flange 741 is located inside the exhaust pipe 21 to prevent the valve core 71 from falling into the suction pipe 6, and the retaining spring 742 is used to abut one end of the elastic member 73, so that the elastic member 73 is located between the retaining spring 742 and the valve housing 72.

[0100] like Figure 7 As shown, when the seed suction tube 3 and the drag ball 4 are unobstructed, the medicinal material seeds enter the collecting chamber 13 through the seed suction hole 41, the central cavity 43, the seed suction tube 3, the suction tube 6, and the manifold 63.

[0101] like Figure 8 As shown, when the seed suction tube 3 and the drag ball 4 are blocked, negative pressure accumulates inside the suction tube 6, the piston 61 moves upward, and the rigid tube 33 pushes the valve core 71 to make it close to the exhaust pipe 21. The air inlet 712 is separated from the guide hole of the valve housing 72 and exposed to the inside of the exhaust pipe 21. The high-pressure airflow inside the exhaust pipe 21 enters the interior of the seed suction tube 3 through the air inlet 712 and the exhaust hole 713, and flushes out the debris blocked in the seed suction tube 3 and the drag ball 4.

[0102] Furthermore, since the piston 61 and the valve core 71 can only be reset when the air pump 2 stops working, and then the cleaned seed suction tube 3 and the drag ball 4 can land and work again, in order to speed up this process, the following technical solutions can also be used.

[0103] The air pump 2 is a pulse air pump.

[0104] The pulse air pump is often used in the milking process. During the interval of its operation, the cleaned seed suction tube 3 and the drag ball 4 can be reset normally.

[0105] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the embodiments of the present invention.

Claims

1. A polygala seed sucking machine, comprising: A tank body (1), comprising a filter structure (11) disposed inside the tank body (1), wherein the filter structure (11) separates the tank body (1) into a negative pressure chamber (12) and a collection chamber (13); An air pump (2) comprising an air suction end and an air discharge end, wherein the air suction end is in communication with the negative pressure chamber (12), and the air discharge end is in communication with the atmosphere; A seed suction tube (3) comprising a seed suction end (31) and a seed discharge end (32), wherein the seed suction end (31) is vertically directed to the ground, and the seed discharge end (32) is connected to the collection chamber (13); It is characterized in that The seed sucking tube (3) is at least partially flexible, the seed sucking end (31) is connected to a towing ball (4), the towing ball (4) is provided with a seed sucking hole (41) passing through the towing ball (4) and connected to the seed sucking end (31), the seed sucking tube (3) has a length capable of extending to the ground, and the towing ball (4) has a weight that enables the seed sucking end (31) to always be vertical to the ground; The collecting chamber (13) is connected to the seed suction tube (3) via a suction tube (6), the seed suction tube (3) is inserted into the inner side of the suction tube (6), the seed discharge end (32) is slidably connected to the suction tube (6) via a piston (61), and the length of the suction tube (6) meets the following conditions: When the piston (61) is located at one end of the suction pipe (6), the drag ball (4) is dragged on the ground; When the piston (61) is located at the other end of the suction pipe (6), the drag ball (4) is suspended in the air; The seed suction tube (3) comprises a rigid tube (33) and a flexible tube (34), wherein the rigid tube (33) and the flexible tube (34) are fixedly connected, the rigid tube (33) is fixedly connected to the piston (61), and the rigid tube (33) is slidably connected to the suction tube (6), and the flexible tube (34) is fixedly connected to the towing ball (4); The exhaust end of the air pump (2) is connected to an exhaust pipe (21), and the exhaust pipe (21) is connected to the suction pipe (6) via a pressing valve (7). The diameter of the exhaust pipe (21) satisfies the following conditions: the pressure of the air discharged by the air pump (2) increases when passing through the exhaust pipe (21); The press valve (7) comprises a valve core (71) that is movable when pressed, a gas channel (711) being formed inside the valve core (71), and the gas channel (711) is opened or closed along with the movement of the valve core (71); The valve core (71) is located on the sliding track of the piston (61) and is capable of contacting the seed discharge end (32). When the seed discharge end (32) pushes the valve core (71) to move, one end of the gas channel (711) is connected to the exhaust pipe (21), and the other end of the gas channel (711) is connected to the seed discharge end (32). The air discharged by the air pump (2) through the exhaust pipe (21) enters the interior of the seed suction tube (3) through the gas channel (711), generating an impact airflow for cleaning the seed suction tube (3) and the seed suction hole (41).

2. The polygala seed sucking machine according to claim 1, characterized in that: The towing ball (4) is a hollow shell, and the interior is filled with a weight (42).

3. The polygala seed sucking machine according to claim 2, characterized in that: The counterweight (42) is liquid, and the ratio of the volume of the counterweight (42) to the volume of the towing ball (4) satisfies the following conditions: When the towing ball (4) is towed, the counterweight (42) inside the towing ball (4) can generate shaking that causes the towing ball (4) to vibrate disorderly.

4. The polygala seed sucking machine according to claim 1, characterized in that: The drag ball (4) is symmetrical about the center of the sphere, the seed suction holes (41) are evenly distributed around the center of the drag ball (4), a central chamber (43) communicating with each of the seed suction holes (41) is formed at the center of the drag ball (4), and the seed suction tube (3) is fixedly connected to one of the seed suction holes (41).

5. The polygala seed sucking machine according to claim 4, characterized in that: The seed suction end (31) is connected to the seed suction hole (41) via a connecting portion (5), and the connecting portion (5) comprises: A first connecting member (51) is inserted into the seed suction hole (41) and abuts against the inner wall of the central chamber (43); a second connecting member (52) inserted into the seed-sucking hole (41) and abutting against the outer wall of the dragging ball (4); the first connecting member (51) and the second connecting member (52) are detachably connected; at least one of the first connecting member (51) and the second connecting member (52) abuts against the inner wall of the seed-sucking hole (41); A through hole (53) passes through the first connecting member (51) and the second connecting member (52), and connects the outside of the towing ball (4) and the inside of the central chamber (43).

6. The polygala seed sucking machine according to claim 1, characterized in that: The valve core (71) is in the shape of a hollow cylinder. An air inlet hole (712) is provided on the side wall of the valve core (71) close to the exhaust pipe (21), and an exhaust hole (713) is provided on the end surface of the valve core (71) close to the piston (61). The pressing valve (7) comprises: A valve housing (72) comprising a guide hole communicating with the exhaust pipe (21) and the suction pipe (6), wherein the valve core (71) is slidably connected to the guide hole; an elastic member (73) connecting the valve core (71) and the valve housing (72), wherein when the elastic member (73) is compressed, an internal force is generated to drive the valve core (71) to move toward the piston (61); A stopper (74) is fixedly connected to the valve core (71) and enables the valve core (71) to always be located inside the guide hole; when the elastic member (73) releases the internal force, the air inlet (712) is located inside the guide hole and disconnected from the exhaust pipe (21).

7. The polygala seed sucking machine according to claim 1, characterized in that: The air pump (2) is a pulse air pump.

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