Leakage-proof structure of spraying machine

Abstract

The utility model provides a leakage-proof structure of a spraying machine, and belongs to the technical field of spraying machines. The problem of how to prevent leakage is solved. According to the leakage-proof structure of the spraying machine, the spraying machine comprises a water inlet one-way valve and a plunger pump, the water inlet one-way valve is connected with a water inlet connector and a water outlet one-way valve, the water inlet one-way valve is provided with an installation opening connected with the plunger pump, a plunger of the plunger pump extends into the installation opening, and the leakage-proof structure comprises a main water seal ring. The leakage-proof structure further comprises an auxiliary water seal ring, the main water seal ring and the auxiliary water seal ring are arranged between the inner wall of the installation opening and the outer wall of a plunger of the plunger pump, a water stagnation cavity is formed between the main water seal ring and the auxiliary water seal ring, a channel is formed in the water inlet one-way valve, and the main water seal ring and the auxiliary water seal ring are communicated through the channel. And the channel is communicated with the stagnant water cavity and the water inlet joint. The leakage-proof structure of the spraying machine can prevent leakage.

Description

Technical Field

[0001] This utility model belongs to the field of sprayer technology and relates to a leak-proof structure for a sprayer. Background Technology

[0002] A sprayer is a machine used in agricultural irrigation in the current technology. Specifically, it generally includes a plunger pump, an inlet check valve connected to the plunger pump, and an outlet check valve connected to the inlet check valve. Specifically, the inlet check valve has an inlet, an outlet, and a mounting port. It is connected to the plunger pump through the mounting port, allowing the plunger to move within the mounting port. An external inlet pipe is connected to the inlet of the inlet check valve, and the inlet and outlet of the outlet check valve are connected. During operation, the plunger pump moves through the plunger installed inside. When the plunger retracts, it draws external water into the inlet check valve through the inlet pipe using negative pressure. When the plunger extends, it forces the drawn-in water into the outlet check valve and discharges it outwards. The water is then atomized and sprayed outwards through a spray pipe connected to the outlet check valve.

[0003] As the usage cycle continues to increase, sprayers often experience water leakage, especially between the inlet check valve and the plunger pump, i.e., at the mounting port. Currently, the mounting port of the inlet check valve and the plunger pump housing are generally connected by a threaded tight fit, and a water seal ring is installed at the port of the mounting port to seal the gap between the two and prevent leakage from occurring.

[0004] However, as the usage time increases, the water seal ring will eventually fail due to the high pressure of the water flow and continuous oxidation. At this time, the water in the inlet check valve will continuously seep through the water seal ring and leak out through the gap between the inlet check valve installation port and the plunger pump housing, causing corrosion at the leakage point and affecting the service life of the inlet check valve and the plunger pump. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a leak-proof structure for a sprayer. The technical problem this invention aims to solve is: how to prevent leakage.

[0006] The objective of this utility model can be achieved through the following technical solution: a leak-proof structure for a sprayer, the sprayer including an inlet check valve and a plunger pump, the inlet check valve being connected to an inlet connector and an outlet check valve, the inlet check valve having an installation port for connection to the plunger pump, and the plunger of the plunger pump extending into the installation port, the leak-proof structure including a main water seal ring and an auxiliary water seal ring, the main water seal ring and the auxiliary water seal ring being disposed between the inner wall of the installation port and the outer wall of the plunger of the plunger pump, and a water retention chamber being formed between the main water seal ring and the auxiliary water seal ring, the inlet check valve having a channel, and the channel connecting the water retention chamber and the inlet connector.

[0007] The working principle of this sprayer's leak-proof structure is as follows: A main water seal ring and a secondary water seal ring are installed opposite each other inside the installation port. The main water seal ring plays a primary sealing role, preventing water leakage from the gap between the inlet check valve installation port and the plunger pump housing. The secondary water seal ring provides a secondary seal. When the main water seal ring fails, the secondary water seal ring takes over the sealing function, causing water that has passed through the main water seal ring to be retained in the stagnant water chamber. Under the pressure of the water pressure in the inlet check valve, the water in the stagnant water chamber continuously flows through the channel and returns to the inlet connector under the negative pressure in the inlet connector and the pressure in the stagnant water chamber. Finally, it is returned to the inlet check valve through the inlet connector. Furthermore, the existence of the stagnant water chamber and the channel minimizes the water pressure acting on the secondary water seal ring, thus reducing the likelihood of seal failure and preventing leakage. This also prevents corrosion at the connection between the inlet check valve and the plunger pump, thereby extending their service life.

[0008] In the aforementioned leak-proof structure of the sprayer, the channel includes a connected drainage channel and a return water channel. The drainage channel is inclined upwards and connects to the stagnant water chamber. The return water channel is horizontally arranged and has an inner diameter larger than that of the drainage channel, and it connects to the inlet connector. The drainage channel and the return water channel work together to connect the stagnant water chamber and the inlet connector. Because the drainage channel is inclined, water stagnating in the stagnant water chamber can be more easily drained into the return water channel by gravity. Furthermore, since the inner diameter of the return water channel is larger than that of the drainage channel, it further reduces the pressure of the water entering it. Its horizontal arrangement ensures that the water flows slowly in the return water channel, preventing a violent impact when the water flows back into the inlet connector and avoiding noise generation.

[0009] In the above-mentioned anti-leakage structure of the sprayer, the anti-leakage structure also includes a retaining sleeve sleeved outside the plunger of the plunger pump. The retaining sleeve is embedded in the mounting port and one end is pressed against the main water seal ring. The secondary water seal ring is embedded and positioned in the retaining sleeve. The water retention cavity is formed between the inner wall of the retaining sleeve and the outer wall of the plunger pump. The retaining sleeve sidewall is provided with a plurality of spaced drainage holes that connect the water retention cavity and the drainage channel. By setting an annular retaining sleeve inside the installation port, a stagnant water chamber is formed between the outer wall of the retaining sleeve and the inner wall of the installation port. Under the premise of ensuring normal connection between the plunger pump piston and the inlet check valve, the main water seal ring is pressed by one end of the retaining sleeve, thereby ensuring the connection stability of the main water seal ring and the auxiliary water seal ring. At the same time, a stagnant water chamber is formed between the retaining sleeve and the plunger of the plunger pump. In addition, by opening several drainage holes on the retaining sleeve circumferentially between the main water seal ring and the auxiliary water seal ring, it is ensured that the water entering the stagnant water chamber through the main water seal ring can be discharged outward to the drainage channel through the drainage holes.

[0010] In the aforementioned leak-proof structure of the sprayer, the end of the retaining sleeve facing away from the mounting port has an annular edge along its circumference. The annular edge and the inner wall of the mounting port form a water-storage cavity that communicates with the drainage channel. The water-storage cavity and the water-holding cavity are connected through several drainage holes. The presence of the water-storage cavity acts as a pressure buffer. Especially when the machine starts or stops, the water entering the water-holding cavity cannot drain quickly enough, and the pressure is entirely applied to the secondary water seal ring. Over time, this can cause the secondary water seal ring to fail. However, due to the presence of the water-storage cavity, the pressure difference causes some of the water entering the water-holding cavity to flow into the water-holding cavity through the drainage holes, thereby reducing the water pressure in the water-holding cavity and thus reducing the pressure on the secondary water seal ring, preventing it from failing. Simultaneously, the water discharged through the water-holding cavity can flow back to the inlet connector sequentially through the drainage holes, the water-holding cavity, the drainage channel, and the return water channel, ensuring the full utilization of leaked water.

[0011] In the aforementioned leak-proof structure of the sprayer, the inner wall of the retaining sleeve facing the mounting port has a circumferentially oriented limiting groove, and the secondary water seal ring is embedded in the limiting groove. This ensures that the secondary water seal ring is firmly contained within the retaining sleeve.

[0012] In the aforementioned leak-proof structure of the sprayer, the retaining sleeve has an annular groove circumferentially formed on its outer wall between the limiting groove and the annular edge. A sealing ring is embedded in the annular groove and abuts against the inner wall of the mounting port. This prevents water leaking through the main water seal ring from seeping outward from the outside of the retaining sleeve along the inner wall of the mounting port.

[0013] In the aforementioned leak-proof structure of the sprayer, the water inlet connector is in the shape of a strip tube. A return water hole is provided on the outer wall of the water inlet connector near its center. The return water channel communicates with the inner cavity of the water inlet connector through the return water hole. This ensures that water entering the return water channel re-enters the water inlet connector under negative pressure, and is then re-introduced into the water inlet check valve by the water inlet connector.

[0014] Compared with existing technologies, the leak-proof structure of this sprayer has the following advantages:

[0015] Based on the original structure, a retaining sleeve and a secondary water seal ring are added inside the installation port. The retaining sleeve ensures the installation stability of the main water seal ring and the secondary water seal ring. At the same time, it forms a water retention cavity between the inner wall of the retaining sleeve and the outer wall of the plunger of the plunger pump, and a water storage cavity between the outer wall of the retaining sleeve and the inner wall of the installation port. Several drainage holes on the side wall of the retaining sleeve connect the water storage cavity and the drainage cavity. The drainage channel and the return water channel are connected to the water inlet connector to realize the return flow of seepage water. This can not only avoid the impact of leakage on the service life of the water inlet check valve and the plunger pump, but also make full use of water resources and eliminate waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the leak-proof structure of this sprayer.

[0017] Figure 2 This is a side view of the leak-proof structure of this sprayer.

[0018] Figure 3 yes Figure 2 A sectional view taken along the AA direction and a magnified view of a portion thereof.

[0019] Figure 4 This is a cross-sectional view of the inlet check valve.

[0020] Figure 5 This is a schematic diagram of the retainer sleeve.

[0021] Figure 6 This is a structural diagram that maintains the view from another angle.

[0022] Figure 7 This is a schematic diagram of the water inlet connector.

[0023] In the diagram, 1 is the inlet connector; 11 is the return water hole; 2 is the inlet check valve; 21 is the mounting port; 211 is the main water seal ring; 212 is the auxiliary water seal ring; 22 is the inlet; 23 is the outlet; 24 is the return water channel; 25 is the drainage channel; 3 is the retaining sleeve; 31 is the drainage hole; 32 is the limiting groove; 33 is the annular groove; 331 is the sealing ring; 34 is the annular edge; 4 is the stagnant water chamber; 5 is the plunger pump; 6 is the outlet check valve; and 7 is the water storage chamber. Detailed Implementation

[0024] 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.

[0025] like Figure 1-3 As shown, the leak-proof structure of this sprayer includes an inlet connector 1 and an inlet check valve 2. The inlet connector 1 is used to connect to an external water inlet pipe for water supply. The inlet check valve 2 has three openings: an installation port 21, an inlet port 22, and an outlet port 23. The outlet port 23 is used to connect to the drain hole 31 of the inlet connector 1. The sprayer also includes a plunger pump 5 and an outlet check valve 6. The installation port 21 of the inlet check valve 2 is connected to the housing of the plunger pump 5, allowing the plunger in the plunger pump 5 to move through the installation port 21. The outlet port 23 of the inlet check valve 2... The inlet 23 is connected to the inlet of the outlet check valve 6. During operation, the plunger pump 5 controls the internal plunger to move within the mounting port 21. When the plunger retracts, water is drawn into the cavity of the inlet check valve 2 through the inlet port 22 of the inlet check valve 2 by negative pressure. When the plunger extends, the water drawn in is discharged into the outlet check valve 6 through the outlet 23 due to the one-way anti-backflow function of the inlet check valve 2. The outlet check valve 6 then sprays water outward through its drain hole 31 into the external drain pipe, thus completing the entire water flow transportation process.

[0026] Combination Figure 4-7The inlet check valve 2 has a circumferential abutment edge inside its mounting port 21. The leak-proof structure includes a main water seal ring 211, a secondary water seal ring 212, and a ring-shaped retaining sleeve 3. The main water seal ring 211 is embedded in the mounting port 21 with one end abutting against the abutment edge. The retaining sleeve 3 is embedded in the mounting port 21, its outer circumferential wall fitting against the inner circumferential wall of the mounting port 21, and one end abutting against the main water seal ring 211. This ensures stable installation while pressing the main water seal ring 211. A limiting groove 32 is provided circumferentially on the inner wall of the retaining sleeve 3 facing the mounting port 21. The secondary water seal ring 212 is embedded in the limiting groove 32, making the main water seal ring 211 and the secondary water seal ring 212 positioned opposite each other. Furthermore, this structure is designed to prevent leakage after subsequent installation of the inlet check valve 2 and the plunger. After the pump 5 housing is connected, the other end of the auxiliary water seal ring 212 can be pressed against the sealing gasket on the plunger pump 5 housing, thereby sealing the gap between the plunger pump 5 housing and the inlet check valve 2. The plunger of the plunger pump 5 extends into the mounting port 21 and passes through the auxiliary water seal ring 212, the retaining sleeve 3 and the main water seal ring 211 in sequence. When working, the plunger pump 5 in the starting state controls the plunger to move like a piston. The main water seal ring 211 prevents water in the inlet check valve 2 from seeping out through the main water seal ring 211. However, as the service life continues to increase, the main water seal ring 211 will inevitably leak due to the long-term influence of water pressure. At this time, the leaked water will enter the retaining sleeve 3 through the main water seal ring 211 and be blocked by the auxiliary water seal ring 212.

[0027] The inlet check valve 2 has a channel inside, specifically including a return water channel 24 and a drain water channel 25. Meanwhile, a return water hole 11 communicating with the cavity is provided on the outer wall near the center of the inlet connector 1. The return water channel 24 of the inlet check valve 2 and the return water hole 11 of the inlet connector 1 are connected by a tubular connector, thus achieving communication between the return water channel 24 and the return water hole 11.

[0028] A stagnant water chamber 4 and a water storage chamber 7 are formed in the inlet check valve 2, located between the main water seal ring 211 and the auxiliary water seal ring 212. Specifically, the stagnant water chamber 4 is formed between the outer wall of the retaining sleeve 3 and the outer wall of the plunger in the plunger pump 5. The water storage chamber 7 is formed between the outer wall of the retaining sleeve 3 and the inner wall of the mounting port 21. The two are connected by several drain holes 31 opened on the retaining sleeve 3. One end of the drain channel 25 is connected to the return water channel 24, and the other end slopes upward and penetrates the inner wall of the mounting port 21 to connect with the water storage chamber 7. The return water channel 24 is horizontally arranged, and its inner diameter is larger than that of the drain channel 25. When the main water seal ring 211 fails to seal, the water enters the water storage chamber 7 through the main water seal ring 211 and is blocked by the auxiliary water seal ring 212 to prevent the leaked water from continuing to seep out. At the same time, under the action of subsequent water pressure, the water that seeps into the water storage chamber 7 enters the stagnant water chamber 4 through the drain hole 31, thereby reducing the pressure applied to the auxiliary water seal ring 212. It then flows back to the water inlet 1 through the drain channel 25 and the return water channel 24 in sequence. Under the negative pressure generated by the negative pressure of the water flow in the water inlet connector 1, it flows back to the water inlet connector 1 through the return water hole 11. The water is then reintroduced into the inlet port 22 of the water inlet check valve 2 through the water inlet connector 1.

[0029] In addition to the above, an annular groove 33 is provided on the outer wall of the retaining sleeve 3 along the circumferential direction between the limiting groove 32 and the annular edge 34, and a sealing ring 331 is embedded in the annular groove 33 to abut against the inner wall of the mounting port 21, thereby sealing the gap between the retaining sleeve 3 and the inner wall of the mounting port 21 and preventing water in the water retention cavity 4 from seeping out from the gap between the outer circumferential wall of the retaining sleeve 3 and the inner circumferential wall of the mounting port 21.

[0030] 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.

[0031] Although this document frequently uses terms such as inlet connector 1, return water hole 11, inlet check valve 2, mounting port 21, main water seal ring 211, auxiliary water seal ring 212, inlet 22, outlet 23, return water channel 24, drainage channel 25, retaining sleeve 3, drainage hole 31, limiting groove 32, annular groove 33, sealing rings 331, 34, annular edge, stagnant water chamber 4, plunger pump 5, outlet check valve 6, and water storage chamber 7, 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 leak-proof structure for a sprayer, the sprayer comprising an inlet check valve (2) and a plunger pump (5), wherein the inlet check valve (2) is connected to an inlet connector (1) and an outlet check valve (6), the inlet check valve (2) having an installation port (21) for connection with the plunger pump, and the plunger of the plunger pump (5) extending into the installation port (21), the leak-proof structure comprising a main water seal ring (211), characterized in that, The leak-proof structure also includes a secondary water seal ring (212). The main water seal ring (211) and the secondary water seal ring (212) are disposed between the inner wall of the mounting port (21) and the outer wall of the plunger of the plunger pump (5), and a water stagnation chamber (4) is formed between the main water seal ring (211) and the secondary water seal ring (212). A channel is provided in the inlet check valve (2), and the channel connects the water stagnation chamber (4) and the inlet connector (1).

2. The leak-proof structure of the sprayer according to claim 1, characterized in that, The channel includes a connected drainage channel (25) and a return water channel (24). The drainage channel (25) is inclined upward and connected to the stagnant water chamber (4). The return water channel (24) is arranged horizontally and its inner diameter is larger than that of the drainage channel (25). The return water channel (24) is connected to the water inlet connector (1).

3. The leak-proof structure of the sprayer according to claim 2, characterized in that, The leak-proof structure also includes a retaining sleeve (3) fitted outside the plunger of the plunger pump (5). The retaining sleeve (3) is embedded in the mounting port (21) and one end is pressed against the main water seal ring (211). The secondary water seal ring (212) is embedded and positioned in the retaining sleeve (3). The water retention chamber (4) is formed between the inner wall of the retaining sleeve (3) and the outer wall of the plunger pump (5). The side wall of the retaining sleeve (3) is provided with a plurality of spaced drainage holes (31) that connect the water retention chamber (4) and the drainage channel (25).

4. The leak-proof structure of the sprayer according to claim 3, characterized in that, The retaining sleeve (3) has an annular edge (34) along the circumferential direction at one end opposite to the mounting port (21). The annular edge (34) and the inner wall of the mounting port (21) form a water storage cavity (7) that communicates with the drainage channel (25). The water retention cavity (4) and the water storage cavity (7) are connected through a plurality of drainage holes (31).

5. The leak-proof structure of the sprayer according to claim 4, characterized in that, The retaining sleeve (3) has a circumferentially ...

6. The leak-proof structure of the sprayer according to claim 5, characterized in that, The retaining sleeve (3) has an annular groove (33) on its outer wall between the limiting groove (32) and the annular edge (34) in the circumferential direction. A sealing ring (331) is embedded in the annular groove (33) and abuts against the inner wall of the mounting port (21).

7. The leak-proof structure of the sprayer according to claim 2, characterized in that, The water inlet connector (1) is in the shape of a strip tube. A return water hole (11) is provided on the outer wall near the middle of the water inlet connector (1). The return water channel (24) is connected to the cavity inside the water inlet connector (1) through the return water hole (11).

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