Fertilizer applicator

Abstract

The utility model provides a fertilizer applicator, and belongs to the technical field of agricultural machinery. The pressure adjusting device solves the problem of how to adjust the pressure of the fertilizer applicator. The fertilizer applicator comprises a pump body, a threaded tubular stator sleeve and a screw-shaped rotor shaft, the rotor shaft is rotationally connected into the stator sleeve, a channel is formed between the rotor shaft and the stator sleeve, the pump body comprises a pump shell internally provided with a water storage cavity and an end cover fixed to the pump shell, the end cover is fixed to the pump shell, and a buffer cavity is formed between the end cover and the outer wall of the pump shell; one end of the stator sleeve extends into the water storage cavity, the other end of the stator sleeve extends into the buffer cavity, a water inlet communicated with the water storage cavity is formed in the pump shell, a water outlet communicated with the buffer cavity is formed in the end cover, the fertilizer applicator further comprises an adjusting valve fixedly connected to the outer wall of the pump body and provided with a water inlet, a water outlet and a pressure relief opening, and the adjusting valve is communicated with the water outlet of the pump body through the water inlet. According to the fertilizer applicator, the pressure of the fertilizer applicator can be adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology and relates to a fertilizer applicator. Background Technology

[0002] Fertilizer applicators are common fluid transport devices in existing technology and are widely used in various fields. In the planting industry, fertilizer applicators also play a crucial role in pesticide spraying. Specifically, they generally include a pump body with an internal mounting cavity. The pump body has a drain outlet and a water inlet connected to the mounting cavity. A stator sleeve is fixed inside the pump body, and a rotor shaft is rotatably connected to the stator sleeve (the rotor shaft is driven to rotate by an external motor with a belt and pulley). A flow channel is formed between the rotor shaft and the stator sleeve. The water inlet end of the flow channel is connected to the mounting cavity, and the water outlet end is connected to the drain outlet.

[0003] In other words, when the motor drives the rotor shaft to rotate and create a negative pressure in the flow channel, the presence of this negative pressure allows external water to be introduced sequentially through the inlet into the installation cavity, the inlet end of the flow channel, the outlet end of the flow channel, and finally discharged through the drain outlet of the pump body. In addition, in order to facilitate control, the existing technology often connects a spray bar to the drain outlet of the pump body to achieve the purpose of spraying the agent.

[0004] However, the use of this type of fertilizer applicator currently has significant limitations. In actual operation, due to many uncontrollable factors, the pumped water pressure is often too high, which can lead to overload in the pump body. Over time, this can affect the service life of the components in the pump body. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a fertilizer applicator. The technical problem to be solved by this utility model is: how to adjust the pressure of the fertilizer applicator.

[0006] The objective of this utility model can be achieved through the following technical solution: A fertilizer applicator includes a pump body, a threaded tubular stator sleeve, and a screw-shaped rotor shaft. The rotor shaft is rotatably connected in the stator sleeve and forms a channel with the stator sleeve. The pump body includes a pump casing with an internal water storage chamber and an end cap fixed to the pump casing. The end cap is fixed to the pump casing and forms a buffer cavity between itself and the outer wall of the pump casing. One end of the stator sleeve extends into the water storage chamber, and the other end extends into the buffer cavity. The pump casing has an inlet communicating with the water storage chamber, and the end cap has a drain outlet communicating with the buffer cavity. The fertilizer applicator also includes a regulating valve fixedly connected to the outer wall of the pump body and having an inlet, an outlet, and a pressure relief port. The regulating valve is connected to the drain outlet of the pump body through the inlet.

[0007] The working principle of the fertilizer applicator disclosed in this application is as follows: The rotor shaft is driven to rotate within the stator sleeve by a motor and belt, connected to a pulley at the outer end of the rotor shaft. During this process, because the rotor shaft is screw-shaped and the stator sleeve is threaded, the pesticide and water introduced into the channel through the inlet are fully mixed under intermittent pressure to form a mixture. Under subsequent pressure, the mixture is discharged from the pump body through the drain outlet. Based on this structure, this application installs a regulating valve with an inlet, outlet, and pressure relief port on the pump body. The regulating valve can adopt existing technology, and its internal connection includes an outlet valve core for controlling the opening and closing of the outlet and a pressure relief valve core for controlling the opening and closing of the pressure relief port. The inlet of the regulating valve is connected to the drain outlet of the pump body, allowing the mixture pumped out of the pump body to enter the regulating valve. The presence of the outlet valve core in the regulating valve ensures that the mixture is discharged normally through the outlet. Under this premise, when the internal pressure of the body is too high, the pressure can be automatically regulated by the control valve core. Once the pressure reaches a certain value, the control valve core can be pushed open by the mixture, allowing the overpressured mixture to be discharged through the pressure relief port of the regulating valve. This prevents internal parts from being damaged due to pressure overload inside the fertilizer applicator. In addition, when the user stops spraying the pesticide but the pump is still in operation (i.e., the spray bar is closed), the overpressured mixture inside can also be discharged through the pressure relief port of the regulating valve. It is worth mentioning that in actual operation, water and pesticide are introduced into the water storage chamber of the pump body from the inlet. With the cooperation of the stator shaft and rotor sleeve, water and pesticide enter the flow channel. The mixture output through the channel is not directly discharged into the regulating valve through the drain port on the end cover. Instead, it is buffered and depressurized through the buffer chamber formed between the pump casing and the end cover before entering the regulating valve. This ensures that the gas generated by the mixing of water and pesticide in the channel can be released, avoiding the mixture discharged through the drain port from being mixed with a large amount of air, thus ensuring more uniform fertilization of crops.

[0008] In the aforementioned fertilizer applicator, the pump casing is cylindrical and closed at one end. The end cap is connected to the closed end of the pump casing, and the closed end of the pump casing has a clearance opening. The stator sleeve passes through the clearance opening and extends into the buffer chamber. This ensures that the water storage chamber and the buffer chamber in the pump body are completely separated, preventing the pressure in the two chambers from affecting each other. Furthermore, the clearance opening ensures that the stator sleeve can be properly arranged, guaranteeing the orderly supply of the mixture formed by the mixing of water and pesticide.

[0009] In the aforementioned fertilizer applicator, a connecting hole for communicating with the buffer chamber is provided on the outer wall of the end cap. The fertilizer applicator also includes a pressure gauge, the detection end of which is fixedly connected to the connecting hole and extends into the buffer chamber. The pressure gauge allows the user to more intuitively identify the pressure in the buffer chamber and control the opening and closing of the pressure relief port of the regulating valve based on the value displayed by the pressure gauge, thus achieving manual pressure relief.

[0010] In the aforementioned fertilizer applicator, the closed end of the pump casing is provided with an annular sealing gasket, which abuts against the outer wall of the open end of the end cap. This ensures the sealing of the buffer chamber.

[0011] In the aforementioned fertilizer applicator, the inlet of the regulating valve is arranged axially along the rotor shaft, the outlet of the regulating valve is arranged radially and vertically along the rotor shaft, and the pressure relief port of the regulating valve is arranged radially and horizontally along the rotor shaft. This arrangement ensures a more rational arrangement of the inlet, outlet, and pressure relief port relative to the pump body, ensuring that the input, output, and pressure relief of the medium meet actual requirements.

[0012] Compared with existing technologies, this fertilizer applicator has the following advantages:

[0013] 1. Water and chemicals are introduced into the flow channel by using a screw-shaped rotor shaft and a threaded tube-shaped stator sleeve. After being fully mixed, the mixture is fed into the regulating valve through the inlet. When the pressure in the pump body is too high, some of the pressure can be relieved through the pressure relief port of the regulating valve.

[0014] 2. The buffer chamber releases the gas present when water and pesticide are mixed, preventing a large amount of air from being mixed in when discharged from the drain outlet, thus ensuring more even fertilization of crops. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this fertilizer applicator.

[0016] Figure 2 This is a simplified cross-sectional view of the fertilizer applicator.

[0017] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0018] Figure 4 yes Figure 2 A magnified view of a section at point B.

[0019] Figure 5 This is a cross-sectional view of the control valve.

[0020] In the diagram, 1. Pump body; 11. Inlet; 12. Outlet; 13. Stator sleeve; 14. Rotor shaft; 15. Pump casing; 151. Water storage chamber; 152. Relief port; 153. Sealing gasket; 16. End cover; 161. Connection hole; 2. Channel; 3. Regulating valve; 31. Inlet; 32. Outlet; 33. Pressure relief port; 4. Buffer chamber; 5. Pressure gauge. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown, this fertilizer applicator includes a pump body 1, a rotor shaft 14, a stator sleeve 13, and a pressure regulating valve. The rotor shaft 14, stator sleeve 13, and pressure regulating valve can all utilize existing technologies. It should be noted that, in conjunction with… Figure 2 The pump body 1 specifically includes a cylindrical pump casing 15 and an end cover 16. The open end of the pump casing 15 is fixed with a sealing cover by bolts, so that a water storage cavity 151 is formed inside the pump casing 15. The open end of the end cover 16 is fixed with bolts to the closed end of the pump casing 15, so that a buffer cavity 4 is formed between the two. The closed end of the pump casing 15 has a relief port 152 that communicates with the water storage cavity 151. The stator sleeve 13 is inserted into the open end of the pump casing 15 and extends into the water storage cavity 151 through the relief port 152 (the outer wall of the stator sleeve 13 and the inner wall of the relief hole are sealed). The rotor shaft 14 is rotatably connected to the stator sleeve 13, and a channel 2 is formed between the two. The inlet of the channel 2 communicates with the water storage cavity 151, and the outlet communicates with the buffer cavity 4. One end of the rotor shaft 14 extends out through an opening on the sealing cover and is fixed with a pulley. The pulley is connected to an external motor via a belt. The rotor shaft 14 rotates within the stator sleeve 13. It is worth mentioning that the rotor shaft 14 and stator sleeve 13 in this application can adopt existing technology. Their structure can refer to the rotor and stator disclosed in Chinese Patent CN200420110663. An inlet 11 communicating with the water storage chamber 151 is provided on the outer wall of the pump casing 15, and a drain outlet 12 communicating with the water storage chamber 151 is provided on the inner bottom wall of the end cover 16. During operation, the rotating rotor can introduce water and medicine into the channel 2 through the inlet 11 and the water storage chamber 151 in sequence by pressure. As the rotor shaft 14 rotates continuously, due to the structural factors of the rotor shaft 14 and the stator sleeve 13, the water and medicine can be intermittently squeezed, so that the two are fully mixed and then input into the buffer chamber 4, and finally discharged outward through the drain outlet 12.

[0023] Combination Figure 3 and Figure 4An annular sealing gasket 153 is provided between the end cover 16 and the pump housing 15 to seal the gap between them and prevent the mixture in the buffer chamber 4 from leaking out of the gap. Based on this structure, an annular limiting groove can be opened at the closed end of the pump housing 15 to accommodate the sealing gasket 153, so as to ensure the ease of assembly and sealing effect of the sealing gasket 153. A connecting hole 161 communicating with the water storage chamber 151 is opened on the outer wall of the end cover 16. This fertilizer applicator also includes a pressure gauge 5. The pressure gauge 5 can adopt existing technology, and its detection end is screwed and fixed in the connecting hole 161 and extends into the buffer chamber 4.

[0024] Combination Figure 5 The fertilizer applicator also includes a regulating valve 3, which can adopt existing technology. It has an inlet 31, an outlet 32, and a pressure relief port 33. The regulating valve 3 is equipped with an outlet valve core for controlling the opening and closing of the outlet 32 ​​and a pressure relief valve core for controlling the opening and closing of the pressure relief port 33. Both are controlled by separate valve stem mechanisms (for specific structure, please refer to CN 216895826 U). Furthermore, the inlet 31 of the regulating valve 3 is arranged along the axial direction of the rotor shaft 14 and connected to the drain port 12 on the end cover 16. Its outlet 32 ​​is arranged radially and downward along the rotor shaft 14, and its pressure relief port 33 is arranged radially and horizontally along the rotor shaft 14.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as pump body 1, inlet 11, outlet 12, stator sleeve 13, rotor shaft 14, pump casing 15, water storage chamber 151, relief port 152, sealing gasket 153, end cover 16, connecting hole 161, channel 2, regulating valve 3, inlet 31, outlet 32, pressure relief port 33, buffer chamber 4, and pressure gauge 5, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A fertilizer applicator, comprising a pump body (1), a threaded tubular stator sleeve (13), and a screw-shaped rotor shaft (14), wherein the rotor shaft (14) is rotatably connected in the stator sleeve (13) and forms a channel (2) with the stator sleeve (13), characterized in that, The pump body (1) includes a pump casing (15) with a water storage chamber (151) inside and an end cap (16) fixed on the pump casing (15). The end cap (16) is fixed on the pump casing (15) and forms a buffer cavity (4) between it and the outer wall of the pump casing (15). One end of the stator sleeve (13) extends into the water storage chamber (151) and the other end extends into the buffer cavity (4). The pump casing (15) has an inlet (11) that communicates with the water storage chamber (151). The end cap (16) has a drain outlet (12) that communicates with the buffer cavity (4). The fertilizer applicator also includes a regulating valve (3) that is fixedly connected to the outer wall of the pump body (1) and has an inlet (31), an outlet (32) and a pressure relief port (33). The regulating valve (3) is connected to the drain outlet (12) of the pump body (1) through the inlet (31).

2. The fertilizer applicator according to claim 1, characterized in that, The pump housing (15) is cylindrical and closed at one end. The end cap (16) is connected to the closed end of the pump housing (15). The closed end of the pump housing (15) has a relief opening (152). The stator sleeve (13) passes through the relief opening (152) and extends into the buffer cavity (4).

3. The fertilizer applicator according to claim 1 or 2, characterized in that, The end cap (16) has a connecting hole (161) on its outer side wall that connects to the buffer cavity (4). The fertilizer applicator also includes a pressure gauge (5), the detection end of which is fixedly connected to the connecting hole (161) and extends into the buffer cavity (4).

4. The fertilizer applicator according to claim 3, characterized in that, The closed end of the pump housing (15) is provided with an annular sealing gasket (153), and the sealing gasket (153) and the outer wall of the open end of the end cap (16) are tightly pressed together.

5. The fertilizer applicator according to claim 4, characterized in that, The inlet (31) of the regulating valve (3) is arranged along the axial direction of the rotor shaft (14), the outlet (32) of the regulating valve (3) is arranged radially and vertically along the rotor shaft (14), and the pressure relief port (33) of the regulating valve (3) is arranged radially and horizontally along the rotor shaft (14).

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