Liquid variable displacement pump and organic fertilizer application device

Abstract

The present invention discloses a liquid variable displacement pump and an organic fertilizer application device, and relates to the technical field of variable displacement pumps. The liquid variable displacement pump includes a piston, and also includes: a first cooling mechanism, which is arranged at the end of the piston and can cool the cylinder when the liquid in the cylinder is not full; a second cooling mechanism, which is arranged in the piston and is used to cool the piston. When the liquid drawn into the cylinder is small, the liquid can be sprinkled on the inner wall of the cylinder, which can not only have a good cooling effect on the cylinder, but also have a lubricating effect on the piston, avoiding a sudden rise in the temperature of the pump body due to dry friction of the piston, and can improve the efficiency and effect of piston cooling; when applying organic fertilizer, it is convenient to adjust the width of the fertilizer application according to the use requirements, and it is convenient to fertilize the leaves of crops according to the needs, thereby improving the utilization rate of liquid fertilizer and avoiding waste.

Description

Technical Field

[0001] The invention relates to the technical field of variable displacement pumps, in particular to a liquid variable displacement pump and an organic fertilizer application device. Background Art

[0002] A piston pump is a positive displacement pump that relies on the reciprocating motion of the piston in the pump body to periodically change the volume of several working chambers in the pump body, thereby alternately sucking in and discharging liquid, and converting the mechanical energy of the piston's reciprocating motion into liquid pressure energy. It is a type of liquid variable displacement pump. The piston is driven to reciprocate in the pump body by a hydraulic module. It is usually used in organic fertilizer application devices. The piston pump is used to suck in and discharge the liquid organic fertilizer in the fertilizer box, and then spray it through the nozzle to achieve organic fertilizer application on crops.

[0003] However, when the existing liquid variable displacement pump and organic fertilizer application device are in use, if the liquid organic fertilizer level in the fertilizer tank is too low and the device continues to operate, the dry friction of the piston causes the temperature of the pump body to rise sharply. At the same time, during operation, the heat dissipation effect of the piston is poor, thereby affecting the use effect and life of the piston pump; when the organic fertilizer application device is in use, it is not convenient to adjust the fertilization width according to the use requirements. At the same time, when fertilizing, some crops only need to be fertilized at the roots and not the leaves, while some crops need to be fertilized at both the roots and leaves. It is not convenient to fertilize the leaves of the crops according to the use requirements, which easily leads to waste of fertilizer. Summary of the Invention

[0004] The object of the present invention is to provide a liquid variable displacement pump and an organic fertilizer application device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a liquid variable displacement pump and an organic fertilizer application device, comprising a base, a cylinder, a piston, a piston rod, a hydraulic module, a liquid inlet and a liquid outlet arranged on a piston pump, and further comprising:

[0006] a first cooling mechanism, provided at the end of the piston, capable of cooling the cylinder when the cylinder is not full of liquid;

[0007] A second cooling mechanism is provided in the piston and is used to cool the piston;

[0008] The first cooling mechanism comprises:

[0009] a circular groove, formed at an end of the piston;

[0010] A rotating mechanism is provided on the piston, and a rotating disk is connected to the rotating mechanism so that the rotating disk can rotate in the circular groove;

[0011] The telescopic mechanism is arranged at the end of the rotating disk, and the telescopic mechanism is connected with a liquid collection cover so that the liquid collection cover can be retracted into the rotating disk.

[0012] Preferably, the rotating mechanism includes an installation cavity opened in the piston rod, and a rotating rod is inserted in the installation cavity, the rotating rod is rotatably connected to the piston and fixed to the rotating disk, and the side wall of the rotating rod is provided with a spirally arranged sliding groove, the side wall of the installation cavity is provided with a strip opening, and a first push rod is inserted in the strip opening, the upper end of the first push rod is fixed to the inner wall of the cylinder body, and the lower end of the first push rod is inserted in the sliding groove.

[0013] Preferably, the telescopic mechanism includes a mounting groove provided at the end of the rotating disk, and the liquid collection cover is inserted in the mounting groove, the inner side wall of the mounting groove is fixedly connected with a mounting block, and the side wall of the mounting block is fixedly connected with a first magnet, the inner wall of the liquid collection cover is fixedly connected with a second magnet, and the second magnet is opposite to the first magnet with the same pole, a limiting groove is provided at the top of the mounting groove, a limiting block is inserted in the limiting groove, and the limiting block is fixed to the liquid collection cover.

[0014] Preferably, the second cooling mechanism includes a cooling cavity opened in each piston, and each cooling cavity includes a plurality of circular cavities, two adjacent circular cavities are connected by an annular groove, and the two cooling cavities are connected by a connecting pipe, the top of the cylinder body is fixedly connected to a support plate, and the side wall of the support plate is fixedly connected to a cooling box, a liquid outlet pipe and a liquid inlet pipe are fixedly connected between the two cooling cavities and the cooling box, and a moving block is connected to the cooling box through a lifting mechanism.

[0015] Preferably, the lifting mechanism includes a first connecting block fixedly connected to the side wall of the cooling box, and the top of the first connecting block is fixedly connected to two symmetrically arranged first sleeves, each of the first sleeves is inserted with a first rod, and the upper end of the first rod is fixedly connected to the second connecting block, the second connecting block is fixed to the side wall of the cooling box, and the side wall of each first sleeve is sleeved with a first spring, the end of the piston is fixedly connected to a connecting plate, and the top of the connecting plate is fixedly connected to a plurality of array-arranged protrusions, the bottom of the moving block is fixedly connected to a second push rod, and the lower end of the second push rod passes through the cylinder body and can slide on the side wall of the protrusion.

[0016] An organic fertilizer application device includes a tractor, and the tractor includes a mounting frame and a liquid variable displacement pump, the base is fixed on the mounting frame, and the side wall of the mounting frame is fixedly connected to a U-shaped frame, the side wall of the U-shaped frame is fixedly connected to a fixed pipe, and the side wall of the U-shaped frame is connected to two symmetrically arranged adjustment pipes through a movable module, and a fertilizer pipe group is provided at the bottom of the fixed pipe and the adjustment pipe, and the fertilizer pipe group includes a plurality of first fertilizer pipes fixedly connected to the bottom of the fixed pipe and a plurality of second fertilizer pipes fixedly connected to the bottom of the adjustment pipe, and the fertilizer pipe group is connected to a first movable pipe and a second movable pipe that are sleeved with each other through a lifting mechanism, A first telescopic assembly is arranged between the first movable tube and the second movable tube, and the side wall of the first movable tube is provided with a plurality of first fertilization holes arranged in an array and a plurality of second fertilization holes arranged in an array, the side wall of the second movable tube is provided with a plurality of third fertilization holes arranged in an array, and the side wall of each first fertilization tube is provided with a switch mechanism, the side wall of the mounting frame is fixedly connected to the fertilizer box, and the liquid inlet is communicated with the fertilizer box, the liquid outlet is fixedly connected to the first connecting tube, and the other end of the first connecting tube is communicated with the fixed tube, the side wall of the first connecting tube is fixedly connected to the telescopic tube, and each adjusting tube is communicated with the telescopic tube through the second connecting tube.

[0017] Preferably, the switch mechanism includes a fixed cover fixedly inserted into the side wall of the first fertilizer pipe, and a sealing plate is connected to the fixed cover through a movable mechanism, and a circular hole is opened on the top of the sealing plate.

[0018] Preferably, the movable mechanism includes a third connecting block fixedly connected to the side wall of the sealing plate, and the side wall of the third connecting block is fixedly connected to a T-shaped guide rod, the side wall of the T-shaped guide rod is sleeved with a fourth connecting block, and the fourth connecting block is fixed to the side wall of the fixed cover, and the side wall of each T-shaped guide rod is sleeved with a second spring, and the side wall of the second fertilizer pipe is fixedly connected to two symmetrically arranged U-shaped plates, and the side wall of the U-shaped plate is provided with a slope.

[0019] Preferably, the first telescopic assembly includes a support block fixedly connected to the bottom of the second moving tube, and the bottom of the support block is fixedly connected to a second sleeve rod, the side wall of the second sleeve rod is sleeved with a second sleeve, the lower end of the second sleeve is fixed to the bottom of the first moving tube, and the side wall of each second sleeve is sleeved with a third spring.

[0020] The lifting mechanism comprises a rectangular groove provided on the side wall of the fertilizer pipe group, and a telescopic cover is fixedly inserted in the rectangular groove, and the side wall of the telescopic cover is fixedly inserted with a first pushing plate and a second pushing plate, the first pushing plate is fixed to the top of the first moving tube, and the second pushing plate is fixed to the top of the second moving tube, the bottom of the U-shaped frame is connected to the first moving plate through a lifting module, and the bottom of the first moving plate is connected to the second moving plate through a second telescopic assembly, the first moving plate includes a first left half and a first right half, and the second moving plate includes a second left half and a second right half, the first left half and the first right half and the second left half and the second right half are all slidably connected by guide rails, the bottom of the U-shaped frame is fixedly connected to a mounting plate, the side wall of the mounting plate is provided with a threaded hole, and a bolt is threadedly connected in the threaded hole, the first pushing plate is inserted into the side wall of the second moving plate, and the second pushing plate is in contact with the bottom of the first moving plate;

[0021] The second telescopic assembly includes a plurality of third sleeves fixed to the bottom of the first movable plate, and a third rod is inserted into each third sleeve. The lower end of the third rod is fixed to the top of the second movable plate, and a fourth spring is sleeved on the side wall of each third sleeve.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This liquid variable-displacement pump and organic fertilizer application device are provided with a first cooling mechanism, a second cooling mechanism and a lifting mechanism. When the liquid level in the fertilizer box is low, less liquid is pumped into the cylinder body and the cylinder body cannot be filled. At this time, the liquid can be sprinkled on the inner wall of the cylinder body, which not only has a good cooling effect on the cylinder body, but also has a lubricating effect on the piston, avoiding a sudden temperature rise of the pump body caused by dry friction of the piston. In addition, the coolant in the piston cooling chamber can be circulated to increase the moving stroke and cooling area of ​​the coolant, thereby ensuring the efficiency and effect of the cooling, and ensuring the effect and life of the use. When applying organic fertilizer, it is convenient to adjust the fertilization width according to the use demand, and it is convenient to fertilize the leaves of crops according to demand, thereby improving the utilization rate of liquid fertilizer and avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the piston pump in the present invention;

[0025] Figure 2 It is a partial cross-sectional structural schematic diagram of the cylinder body in the present invention;

[0026] Figure 3 It is a partial cross-sectional structural diagram of the piston and piston rod in the present invention;

[0027] Figure 4Schematic diagram of the overall structure of the mechanical fertilizer application device of the present invention;

[0028] Figure 5 Schematic diagram of the overall structure of the U-shaped frame in the present invention;

[0029] Figure 6 Schematic diagram of a partial cross-section of the first fertilizing pipe, the first movable pipe, and the second movable pipe in the present invention;

[0030] Figure 7 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 8 for Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0032] Figure 9 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0033] Figure 10 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0034] Figure 11 for Figure 5 Schematic diagram of the enlarged structure at E in the middle;

[0035] Figure 12 for Figure 5 Schematic diagram of the enlarged structure at F in the middle;

[0036] Figure 13 for Figure 6 Schematic diagram of the enlarged structure at G in the middle;

[0037] Figure 14 for Figure 6 Schematic diagram of the enlarged structure at H in the middle;

[0038] Figure 15 for Figure 13 Schematic diagram of the enlarged structure at I in the middle;

[0039] Figure 16 for Figure 9 Schematic diagram of the enlarged structure at J in the middle.

[0040] In the figure: 101, base; 102, cylinder; 103, liquid inlet; 104, liquid outlet; 105, hydraulic module; 106, piston; 107, piston rod; 201, circular cavity; 202, annular groove; 203, connecting pipe; 204, cooling box; 205, liquid outlet pipe; 206, liquid inlet pipe; 207, moving block; 208, support plate; 301, first connecting block; 302, first sleeve; 303, first sleeve rod; 304, second connecting block; 305, first spring; 306, second push rod ; 307, connecting plate; 308, protrusion; 401, mounting block; 402, first magnet; 403, second magnet; 404, limiting groove; 405, limiting block; 501, fixing cover; 502, sealing plate; 503, round hole; 601, third connecting block; 602, T-shaped guide rod; 603, fourth connecting block; 604, second spring; 605, U-shaped plate; 606, inclined plane; 701, supporting block; 702, second set of rods; 703, second sleeve; 704, third spring; 801, lifting module ; 802, first left half; 803, second left half; 804, first right half; 805, second right half; 806, rectangular groove; 807, telescopic cover; 808, first push plate; 809, second push plate; 810, mounting plate; 811, threaded hole; 812, bolt; 813, guide rail; 901, third sleeve; 902, third rod; 903, fourth spring; 1001, sliding groove; 1002, first push rod; 1003, rotating rod; 1004, strip opening; 100 5. Mounting cavity; 11. Circular groove; 12. Rotating disk; 13. Mounting groove; 14. Liquid collection cover; 15. Tractor; 1501. Mounting frame; 16. U-shaped frame; 17. Fixed pipe; 18. Adjusting pipe; 1901. First fertilizing pipe; 1902. Second fertilizing pipe; 20. First movable pipe; 21. First fertilizing hole; 22. Second movable pipe; 23. Third fertilizing hole; 24. First connecting pipe; 25. Second connecting pipe; 26. Telescopic pipe; 27. Mobile module; 28. Fertilizer box; 29. ​​Second fertilizing hole. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figures 1-16The present invention provides a liquid variable displacement pump and an organic fertilizer application device, comprising a base 101, a cylinder 102, a piston 106, a piston rod 107, a hydraulic module 105, a liquid inlet 103, and a liquid outlet 104, which are arranged on a piston pump, and further comprising:

[0043] The first cooling mechanism is provided at the end of the piston 106 and is capable of cooling the cylinder 102 when the liquid in the cylinder 102 is not full;

[0044] A second cooling mechanism is provided in the piston 106 and is used to cool the piston 106;

[0045] The first cooling mechanism comprises:

[0046] The circular groove 11 is formed at the end of the piston 106;

[0047] The rotating mechanism is provided on the piston 106, and the rotating disk 12 is connected to the rotating mechanism so that the rotating disk 12 can rotate in the circular groove 11;

[0048] The telescopic mechanism is provided at the end of the rotating disk 12 , and the liquid collecting cover 14 is connected to the telescopic mechanism so that the liquid collecting cover 14 can be retracted into the rotating disk 12 .

[0049] The rotating mechanism includes a mounting cavity 1005 provided in the piston rod 107, and a rotating rod 1003 is inserted into the mounting cavity 1005. The rotating rod 1003 is rotatably connected to the piston 106 and fixed to the rotating disk 12. The side wall of the rotating rod 1003 is provided with a spirally arranged sliding groove 1001. The side wall of the mounting cavity 1005 is provided with a strip opening 1004, and a first push rod 1002 is inserted into the strip opening 1004. The upper end of the first push rod 1002 is fixed to the inner wall of the cylinder body 102, and the lower end of the first push rod 1002 is inserted into the sliding groove. In 1001, when the liquid level in the fertilizer box 28 is low, less liquid is pumped into the cylinder 102, and the cylinder 102 cannot be filled. At this time, the liquid can be sprinkled on the inner wall of the cylinder 102, which can not only have a good cooling effect on the cylinder 102, but also have a lubricating effect on the piston 106, avoiding the dry friction of the piston 106 causing a sudden rise in the temperature of the pump body, and can circulate the coolant in the cooling cavity of the piston 106, increase the moving stroke and cooling area of ​​the coolant, ensure its cooling efficiency and effect, and ensure its use effect and life.

[0050] The telescopic mechanism includes a mounting groove 13 provided at the end of the rotating disk 12, and the liquid collection cover 14 is inserted into the mounting groove 13, the inner side wall of the mounting groove 13 is fixedly connected to the mounting block 401, and the side wall of the mounting block 401 is fixedly connected to the first magnet 402, the inner wall of the liquid collection cover 14 is fixedly connected to the second magnet 403, and the second magnet 403 and the first magnet 402 have the same poles opposite to each other, and a limiting groove 404 is provided at the top of the mounting groove 13, a limiting block 405 is inserted in the limiting groove 404, and the limiting block 405 is fixed to the liquid collection cover 14. When the liquid collection cover 14 abuts against the end of the cylinder body 102, the liquid collection cover 14 can be pushed to retract into the mounting groove 13 for storage, thereby ensuring the effect of liquid extrusion. When the liquid collection cover 14 is separated from the end of the cylinder body 102, the second magnet 403 and the first magnet 402 have the same poles and repel each other, thereby pushing the liquid collection cover 14 to extend outward and reset.

[0051] The second cooling mechanism includes a cooling chamber opened in each piston 106, and each cooling chamber includes a plurality of circular chambers 201. Two adjacent circular chambers 201 are connected by an annular groove 202, and the two cooling chambers are connected by a connecting pipe 203. The top of the cylinder body 102 is fixedly connected to a support plate 208, and the side wall of the support plate 208 is fixedly connected to a cooling box 204. The side wall of the cooling box 204 is provided with heat dissipation fins, and a refrigeration module can also be provided. A liquid outlet pipe 205 and a liquid inlet pipe 206 are fixedly connected between the two cooling chambers and the cooling box 204. A one-way valve is provided in the liquid outlet pipe 205 and the liquid inlet pipe 206, and a moving block 207 is connected to the cooling box 204 through a lifting mechanism. When the piston 106 moves, the connecting pipe 203 is connected to the cooling box 204. The lifting mechanism drives the moving block 207 to move back and forth up and down in the cooling box 204. When the moving block 207 moves downward, the coolant in one of the cooling chambers can be drawn into the cooling box 204 through the liquid inlet pipe 206. When the moving block 207 moves upward, the coolant in the cooling box 204 can be squeezed into the other cooling chamber through the liquid outlet pipe 205. Moreover, the two cooling chambers are connected by the connecting pipe 203. In this way, the coolant in the cooling chambers of the two pistons 106 can be circulated. Moreover, the setting of the circular cavity 201 and the annular groove 202 can increase the moving stroke and cooling area of ​​the coolant in the piston 106, thereby ensuring the efficiency and effect of its cooling, and thus ensuring the service effect and life of the piston pump.

[0052] The lifting mechanism includes a first connecting block 301 fixedly connected to the side wall of the cooling box 204, and the top of the first connecting block 301 is fixedly connected to two symmetrically arranged first sleeves 302, each first sleeve 302 is inserted with a first rod 303, and the upper end of the first rod 303 is fixedly connected to the second connecting block 304, the second connecting block 304 is fixed to the side wall of the cooling box 204, and the side wall of each first sleeve 302 is sleeved with a first spring 305, the end of the piston 106 is fixedly connected to a connecting plate 307, and the top of the connecting plate 307 is fixedly connected to a plurality of array-arranged protrusions 308, and the bottom of the moving block 207 is fixedly connected to the second The push rod 306, and the lower end of the second push rod 306 passes through the cylinder body 102 and can slide on the side wall of the protrusion 308. When the piston 106 moves, the protrusion 308 can be driven to move through the connecting plate 307. When the protrusion 308 is against the lower end of the second push rod 306, the moving block 207 can be pushed to move upward along the cooling box 204. At the same time, the first spring 305 is compressed. When the protrusion 308 passes over the lower end of the second push rod 306, the moving block 207 can move downward and reset under the action of the first spring 305. This reciprocating process can make the moving block 207 move up and down in the cooling box 204.

[0053] An organic fertilizer application device includes a tractor 15, and the tractor 15 includes a mounting frame 1501 and a liquid variable displacement pump. The base 101 is fixed on the mounting frame 1501, and the side wall of the mounting frame 1501 is fixedly connected to a U-shaped frame 16, the side wall of the U-shaped frame 16 is fixedly connected to a fixed pipe 17, and the side wall of the U-shaped frame 16 is connected to two symmetrically arranged adjusting pipes 18 through a moving module 27. The moving module 27 adopts a bidirectional screw rod, which can realize the movement of the two adjusting pipes 18 away from and close to each other. A fertilizer pipe group is provided at the bottom of the fixed pipe 17 and the adjusting pipe 18, and the fertilizer pipe group includes a plurality of first fertilizer pipes 1901 fixedly connected to the bottom of the fixed pipe 17 and a plurality of second fertilizer pipes 1902 fixedly connected to the bottom of the adjusting pipe 18, and the fertilizer pipe group is connected to a first movable pipe 20 and a second movable pipe 22 that are sleeved with each other through a lifting mechanism, and the first movable pipe 20 and the second movable pipe 22 are connected to each other through a lifting mechanism. A first telescopic assembly is provided between the movable tubes 22, and the side wall of the first movable tube 20 is provided with a plurality of first fertilization holes 21 arranged in an array and a plurality of second fertilization holes 29 arranged in an array, the side wall of the second movable tube 22 is provided with a plurality of third fertilization holes 23 arranged in an array, and the side wall of each first fertilization tube 1901 is provided with a switch mechanism, the side wall of the mounting frame 1501 is fixedly connected to the fertilizer box 28, and the liquid inlet 103 is communicated with the fertilizer box 28, the liquid outlet 104 is fixedly connected to the first connecting tube 24, and the other end of the first connecting tube 24 is communicated with the fixed tube 17, the side wall of the first connecting tube 24 is fixedly connected to the telescopic tube 26, and each adjusting tube 18 is communicated with the telescopic tube 26 through the second connecting tube 25. When applying organic fertilizer, it is convenient to adjust the width of the fertilizer according to the use demand, and it is convenient to fertilize the leaves of the crops according to the demand, thereby improving the utilization rate of liquid fertilizer and avoiding waste.

[0054] The switch mechanism includes a fixed cover 501 fixedly inserted into the side wall of the first fertilizer pipe 1901, and a sealing plate 502 is connected to the fixed cover 501 through a moving mechanism. A circular hole 503 is provided on the top of the sealing plate 502. When fertilizing, the width of the fertilizer is first adjusted according to the use requirements. When adjusting, the two adjustment tubes 18 are driven to move away from each other by the moving module 27, and at the same time, the second fertilizer pipe 1902 is driven to move. At the same time, when the second fertilizer pipe 1902 moves, the sealing plate 502 is driven by the moving mechanism to move away from the fixed cover 501 and reset, so that the circular hole 503 is aligned with the first fertilizer pipe 1901. At this time, the second fertilizer pipe 1902 in the gap between the two adjustment tubes 18 can be opened, while the other second fertilizer pipes 1902 remain closed, so that the width of the fertilizer is adjusted according to the use requirements, which is more adaptable and more convenient and quick to use.

[0055] The moving mechanism includes a third connecting block 601 fixedly connected to the side wall of the sealing plate 502, and the side wall of the third connecting block 601 is fixedly connected to a T-shaped guide rod 602, the side wall of the T-shaped guide rod 602 is provided with a fourth connecting block 603, and the fourth connecting block 603 is fixed to the side wall of the fixed cover 501, and the side wall of each T-shaped guide rod 602 is provided with a second spring 604. The side wall of the second fertilizer pipe 1902 is fixedly connected to two symmetrically arranged U-shaped plates 605, and the side wall of the U-shaped plate 605 is provided with an inclined surface 606. The two regulating pipes 18 are driven to move away from each other through the moving module 27, and at the same time, the second fertilizer pipe is driven 1902 moves. At the same time, when the second fertilizer pipe 1902 moves, it can drive the U-shaped plate 605 to move. When the U-shaped plate 605 is separated from the sealing plate 502, the sealing plate 502 can be reset in the direction away from the fixed cover 501 under the action of the second spring 604, so that the circular hole 503 is aligned with the first fertilizer pipe 1901. When the moving module 27 drives the two adjusting tubes 18 to move closer to each other, when the inclined surface 606 is against the sealing plate 502, it can push it to move into the fixed cover 501, sealing the first fertilizer pipe 1901. At the same time, the second spring 604 is compressed.

[0056] The first telescopic assembly includes a support block 701 fixedly connected to the bottom of the second moving tube 22, and the bottom of the support block 701 is fixedly connected to the second sleeve rod 702, the side wall of the second sleeve rod 702 is sleeved with a second sleeve tube 703, the lower end of the second sleeve tube 703 is fixed to the bottom of the first moving tube 20, and the side wall of each second sleeve tube 703 is sleeved with a third spring 704. When applying fertilizer, first adjust the spraying height according to usage requirements. When adjusting, screw the bolt 812 into the threaded hole 811. After the adjustment is completed, the first moving tube 20 and the second moving tube 22 are driven downward by the lifting mechanism. At this time, the third fertilization hole 23 and the second fertilization hole 29 are staggered, and liquid fertilizer can only pass through the third fertilization hole 23 and the second fertilization hole 29. A fertilizer hole 21 sprays out, at this time, the roots of crops can be fertilized. When the roots and leaves need to be fertilized synchronously, the second movable tube 22 is moved downward along the first movable tube 20 through the lifting mechanism. At the same time, the third spring 704 is compressed, and the third fertilizer hole 23 can be aligned with the second fertilizer hole 29. At this time, the liquid fertilizer entering the first fertilizer tube 1901 and the second fertilizer tube 1902 can fertilize the roots of crops through the first fertilizer hole 21. At the same time, the leaves of crops can be fertilized through the third fertilizer hole 23 and the second fertilizer hole 29. It has stronger adaptability, is more convenient and quick to use, and improves the utilization rate of liquid fertilizer to avoid waste.

[0057] The lifting mechanism includes a rectangular groove 806 provided on the side wall of the fertilizer pipe group, and a telescopic cover 807 is fixedly inserted in the rectangular groove 806, and a first push plate 808 and a second push plate 809 are fixedly inserted on the side wall of the telescopic cover 807. The first push plate 808 is fixed to the top of the first movable tube 20, and the second push plate 809 is fixed to the top of the second movable tube 22. The lower part of the U-shaped frame 16 is connected to the first movable plate through the lifting module 801. The lifting module 801 is a well-known technology in the technical field and is not repeated here. The bottom of the first movable plate is connected to the second movable plate through the second telescopic component. The movable plate includes a first left half 802 and a first right half 804, and the second movable plate includes a second left half 803 and a second right half 805. The first left half 802 and the first right half 804, as well as the second left half 803 and the second right half 805, are all slidably connected by a guide rail 813. The bottom of the U-shaped frame 16 is fixedly connected to a mounting plate 810. The side wall of the mounting plate 810 is provided with a threaded hole 811, and a bolt 812 is threadedly connected to the threaded hole 811. The first push plate 808 is inserted into the side wall of the second movable plate, and the second push plate 809 is in contact with the bottom of the first movable plate.

[0058] The second telescopic assembly includes a plurality of third sleeves 901 fixed to the bottom of the first movable plate, and a third sleeve rod 902 is inserted into each third sleeve 901, the lower end of the third sleeve rod 902 is fixed to the top of the second movable plate, and a fourth spring 903 is sleeved on the side wall of each third sleeve 901. The first movable plate is driven downward by the lifting module 801, and at the same time, the second movable plate is driven downward by the telescopic assembly. At this time, the first movable tube 20 and the second movable tube 22 can be driven to move downward synchronously by the first push plate 808 and the second push plate 809. When the second When the left half 803 is against the bolt 812, the lifting module 801 is shut down. At this time, the third fertilization hole 23 and the second fertilization hole 29 are staggered, and liquid fertilizer can only be sprayed out through the first fertilization hole 21. At this time, the roots of crops can be fertilized. When it is necessary to fertilize the roots and leaves synchronously, the first movable plate is driven to continue to move downward through the lifting module 801. At this time, the fourth spring 903 is gradually compressed. When the first movable plate continues to move downward, the second push plate 809 can push the second movable tube 22 to move downward along the first movable tube 20.

[0059] Working principle: When in use, the hydraulic module 105 drives the two pistons 106 to move back and forth in the cylinder 102, so that the liquid fertilizer in the fertilizer box 28 can be pumped into the cylinder 102 through the liquid inlet 103 and discharged through the liquid outlet 104. When the liquid level in the fertilizer box 28 is low, the liquid pumped into the cylinder 102 is less and the cylinder 102 cannot be filled. At this time, when the piston 106 moves, it can drive the rotating rod 1003 to move synchronously. At this time, the lower end of the first push rod 1002 can slide in the sliding groove 1001, thereby pushing The rotating rod 1003 and the rotating disk 12 rotate, and at the same time, the liquid collection cover 14 is driven to rotate through the telescopic mechanism. When the liquid collection cover 14 rotates into the liquid in the cylinder body 102, the liquid can enter the liquid collection cover 14 for temporary storage. When the liquid collection cover 14 rotates out of the liquid, under the action of centrifugal force, the liquid temporarily stored in the liquid collection cover 14 can be sprinkled on the inner wall of the cylinder body 102, which can not only have a good cooling effect on the cylinder body 102, but also have a lubricating effect on the piston 106, avoiding the dry friction of the piston 106 causing a sudden increase in the temperature of the pump body, thereby ensuring its effectiveness and life.

[0060] When the piston 106 moves, the protrusion 308 can be driven to move by the connecting plate 307. When the protrusion 308 abuts against the lower end of the second push rod 306, the moving block 207 can be pushed to move upward along the cooling box 204. At the same time, the first spring 305 is compressed. When the protrusion 308 passes over the lower end of the second push rod 306, the moving block 207 can be moved downward and reset under the action of the first spring 305. This reciprocating process can make the moving block 207 move up and down in the cooling box 204. When the moving block 207 moves downward, one of the The coolant in each cooling cavity is drawn into the cooling box 204 through the liquid inlet pipe 206. When the moving block 207 moves upward, the coolant in the cooling box 204 can be squeezed into the other cooling cavity through the liquid outlet pipe 205. Moreover, the two cooling cavities are connected through the connecting pipe 203. In this way, the coolant in the cooling cavity of the two pistons 106 can be circulated. Moreover, the setting of the circular cavity 201 and the annular groove 202 can increase the moving stroke and cooling area of ​​the coolant in the piston 106, thereby ensuring the efficiency and effect of its cooling, and thus ensuring the use effect and life of the piston pump.

[0061] When applying fertilizer, first adjust the width of fertilizer according to usage requirements. When adjusting, the two adjusting tubes 18 are driven to move away from each other through the moving module 27, and at the same time, the second fertilizer tube 1902 is driven to move. At the same time, when the second fertilizer tube 1902 moves, it can drive the U-shaped plate 605 to move. When the U-shaped plate 605 is separated from the sealing plate 502, the sealing plate 502 can be moved and reset in the direction away from the fixed cover 501 under the action of the second spring 604, so that the circular hole 503 is aligned with the first fertilizer tube 1901. At this time, the second fertilizer tube 1902 in the gap between the two adjusting tubes 18 can be opened, while the other second fertilizer tubes 1902 remain closed, so that it is convenient to adjust the width of fertilizer according to usage requirements, which is more adaptable and more convenient and quick to use.

[0062] When fertilizing, first adjust the spraying height according to the use requirements. When adjusting, screw the bolt 812 into the threaded hole 811. After the adjustment is completed, the first movable plate is driven downward by the lifting module 801. At the same time, the second movable plate is driven downward by the telescopic component. At this time, the first movable tube 20 and the second movable tube 22 can be driven downward synchronously by the first push plate 808 and the second push plate 809. When the second left half 803 is against the bolt 812, the lifting module 801 is stopped. At this time, the third fertilization hole 23 and the second fertilization hole 29 are staggered, and the liquid fertilizer can only be sprayed out through the first fertilization hole 21. At this time, the roots of the crops can be fertilized.

[0063] When it is necessary to fertilize the roots and leaves synchronously, the first movable plate is driven to continue to move downward by the lifting module 801. At this time, the fourth spring 903 is gradually compressed. When the first movable plate continues to move downward, the second push plate 809 can push the second movable tube 22 to move downward along the first movable tube 20. At the same time, the third spring 704 is compressed and can align the third fertilization hole 23 with the second fertilization hole 29. At this time, the liquid fertilizer entering the first fertilizer tube 1901 and the second fertilizer tube 1902 can fertilize the roots of the crops through the first fertilizer hole 21. At the same time, the leaves of the crops are fertilized through the third fertilizer hole 23 and the second fertilizer hole 29. It has stronger adaptability, is more convenient and quick to use, and improves the utilization rate of liquid fertilizer to avoid waste.

[0064] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0065] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A liquid variable displacement pump, comprising a base (101), a cylinder (102), a piston (106), a piston rod (107), a hydraulic module (105), a liquid inlet (103) and a liquid outlet (104) arranged on a piston pump, characterized in that: Also includes: A first cooling mechanism is provided at the end of the piston (106) and is capable of cooling the cylinder (102) when the cylinder (102) is not filled with liquid; a second cooling mechanism, disposed in the piston (106) and used to cool the piston (106); The first cooling mechanism comprises: A circular groove (11) is provided at the end of the piston (106); A rotating mechanism is provided on the piston (106), and a rotating disk (12) is connected to the rotating mechanism so that the rotating disk (12) can rotate in the circular groove (11); a telescopic mechanism, arranged at an end of the rotating disk (12), and a liquid collection cover (14) is connected to the telescopic mechanism, so that the liquid collection cover (14) can be retracted into the rotating disk (12); The rotating mechanism includes a mounting cavity (1005) provided in the piston rod (107), and a rotating rod (1003) is inserted into the mounting cavity (1005), the rotating rod (1003) is rotatably connected to the piston (106) and fixed to the rotating disk (12), and a spirally arranged sliding groove (1001) is provided on the side wall of the rotating rod (1003), a strip opening (1004) is provided on the side wall of the mounting cavity (1005), and a first push rod (1002) is inserted into the strip opening (1004), the upper end of the first push rod (1002) is fixed to the inner wall of the cylinder body (102), and the lower end of the first push rod (1002) is inserted in the sliding groove (1001).

2. A liquid variable displacement pump according to claim 1, characterized in that: The telescopic mechanism comprises a mounting groove (13) provided at the end of the rotating disk (12), and a liquid collecting cover (14) is inserted into the mounting groove (13); an inner side wall of the mounting groove (13) is fixedly connected to a mounting block (401), and a side wall of the mounting block (401) is fixedly connected to a first magnet (402); an inner wall of the liquid collecting cover (14) is fixedly connected to a second magnet (403), and the second magnet (403) and the first magnet (402) have the same poles facing each other; a limiting groove (404) is provided at the top of the mounting groove (13), a limiting block (405) is inserted into the limiting groove (404), and the limiting block (405) is fixed to the liquid collecting cover (14).

3. The liquid variable displacement pump according to claim 1, characterized in that: The second cooling mechanism includes a cooling cavity opened in each piston (106), and each cooling cavity includes a plurality of circular cavities (201), two adjacent circular cavities (201) are connected via an annular groove (202), and the two cooling cavities are connected via a connecting pipe (203), the top of the cylinder body (102) is fixedly connected to a support plate (208), and the side wall of the support plate (208) is fixedly connected to a cooling box (204), a liquid outlet pipe (205) and a liquid inlet pipe (206) are fixedly connected between the two cooling cavities and the cooling box (204), and a moving block (207) is connected in the cooling box (204) via a lifting mechanism.

4. A liquid variable displacement pump according to claim 3, characterized in that: The lifting mechanism includes a first connecting block (301) fixedly connected to the side wall of the cooling box (204), and two symmetrically arranged first sleeves (302) are fixedly connected to the top of the first connecting block (301), a first sleeve rod (303) is inserted into each of the first sleeves (302), and the upper end of the first sleeve rod (303) is fixedly connected to the second connecting block (304), the second connecting block (304) is fixed to the side wall of the cooling box (204), and the side wall of each first sleeve (302) is sleeved with a first spring (305), the end of the piston (106) is fixedly connected to a connecting plate (307), and the top of the connecting plate (307) is fixedly connected to a plurality of array-arranged protrusions (308), the bottom of the moving block (207) is fixedly connected to a second push rod (306), and the lower end of the second push rod (306) passes through the cylinder body (102) and can slide on the side wall of the protrusion (308).

5. An organic fertilizer application device, comprising a tractor (15), wherein the tractor (15) comprises a mounting frame (1501), characterized in that: It also includes a liquid variable displacement pump as described in any one of claims 1 to 4, wherein the base (101) is fixed on the mounting frame (1501), and the side wall of the mounting frame (1501) is fixedly connected to a U-shaped frame (16), the side wall of the U-shaped frame (16) is fixedly connected to a fixed pipe (17), and the side wall of the U-shaped frame (16) is connected to two symmetrically arranged regulating pipes (18) through a moving module (27), and a fertilizer pipe group is provided at the bottom of the fixed pipe (17) and the regulating pipe (18), and the fertilizer pipe group includes a plurality of first fertilizer pipes (1901) fixedly connected to the bottom of the fixed pipe (17) and a plurality of second fertilizer pipes (1902) fixedly connected to the bottom of the regulating pipe (18), and the fertilizer pipe group is connected to a first movable pipe (20) and a second movable pipe (22) which are sleeved with each other through a lifting mechanism, and the first movable pipe (20) and the second movable pipe (22) are sleeved with each other. A first telescopic assembly is provided between the movable tubes (22), and a plurality of first fertilizing holes (21) and a plurality of second fertilizing holes (29) arranged in an array are provided on the side wall of the first movable tube (20), a plurality of third fertilizing holes (23) arranged in an array are provided on the side wall of the second movable tube (22), and a switch mechanism is provided on the side wall of each first fertilizing tube (1901). The side wall of the mounting frame (1501) is fixedly connected to a fertilizer box (28), and the liquid inlet (103) is communicated with the fertilizer box (28). The liquid outlet (104) is fixedly connected to a first connecting tube (24), and the other end of the first connecting tube (24) is communicated with a fixed tube (17). The side wall of the first connecting tube (24) is fixedly connected to a telescopic tube (26), and each regulating tube (18) is communicated with the telescopic tube (26) through a second connecting tube (25).

6. An organic fertilizer application device according to claim 5, characterized in that: The switch mechanism comprises a fixed cover (501) fixedly inserted into the side wall of the first fertilizing pipe (1901), and a sealing plate (502) is connected to the fixed cover (501) via a movable mechanism, and a circular hole (503) is opened on the top of the sealing plate (502).

7. An organic fertilizer application device according to claim 6, characterized in that: The moving mechanism comprises a third connecting block (601) fixedly connected to the side wall of the sealing plate (502), and the side wall of the third connecting block (601) is fixedly connected to a T-shaped guide rod (602), the side wall of the T-shaped guide rod (602) is sleeved with a fourth connecting block (603), and the fourth connecting block (603) is fixed to the side wall of the fixed cover (501), and the side wall of each T-shaped guide rod (602) is sleeved with a second spring (604), and the side wall of the second fertilizer pipe (1902) is fixedly connected to two symmetrically arranged U-shaped plates (605), and the side wall of the U-shaped plate (605) is provided with an inclined surface (606).

8. An organic fertilizer application device according to claim 5, characterized in that: The first telescopic assembly includes a support block (701) fixedly connected to the bottom of the second movable tube (22), and the bottom of the support block (701) is fixedly connected to a second sleeve rod (702), the side wall of the second sleeve rod (702) is sleeved with a second sleeve tube (703), the lower end of the second sleeve tube (703) is fixed to the bottom of the first movable tube (20), and the side wall of each second sleeve tube (703) is sleeved with a third spring (704).

9. An organic fertilizer application device according to claim 5, characterized in that: The lifting mechanism includes a rectangular groove (806) provided on the side wall of the fertilizer pipe group, and a telescopic cover (807) is fixedly inserted in the rectangular groove (806), and a first push plate (808) and a second push plate (809) are fixedly inserted in the side wall of the telescopic cover (807), the first push plate (808) is fixed to the top of the first movable tube (20), and the second push plate (809) is fixed to the top of the second movable tube (22), the bottom of the U-shaped frame (16) is connected to the first movable plate through the lifting module (801), and the bottom of the first movable plate is connected to the second movable plate through the second telescopic assembly, the first movable plate includes a first left half (802) and a second left half (809). a right half (804), and the second movable plate includes a second left half (803) and a second right half (805), the first left half (802) and the first right half (804), as well as the second left half (803) and the second right half (805) are all slidably connected via a guide rail (813), the bottom of the U-shaped frame (16) is fixedly connected to a mounting plate (810), a side wall of the mounting plate (810) is provided with a threaded hole (811), and a bolt (812) is connected to the threaded hole (811), the first push plate (808) is inserted into the side wall of the second movable plate, and the second push plate (809) is in contact with the bottom of the first movable plate; The second telescopic assembly includes a plurality of third sleeves (901) fixed to the bottom of the first movable plate, and each third sleeve (901) is provided with a third rod (902) inserted therein, the lower end of the third rod (902) is fixed to the top of the second movable plate, and the side wall of each third sleeve (901) is provided with a fourth spring (903).

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