Novel spraying machine with self-unloading structure

Abstract

The utility model discloses a novel sprayer with a self-unloading structure, which belongs to the technical field of sprayers, and adopts the technical scheme that the novel sprayer comprises a plunger pump, a crankshaft is arranged in the plunger pump, the crankshaft is connected with an external power source, a pressure relief opening is formed in the plunger pump, and a pressure relief device is arranged at the pressure relief opening. The pressure relief device comprises a shell, a valve body, a valve seat, an adjusting piece, a first plug, a second plug, a first spring, a second spring and a third spring, the spraying machine can flexibly relieve pressure according to different pressures, and the pressure set value can be adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of sprayers, and particularly relates to a new type of sprayer with a self-unloading structure. Background Art

[0002] A sprayer is a mechanical device that disperses a liquid into a mist, and is widely used in multiple fields such as agriculture, medicine, and industry. The design of the pressure relief valve in a sprayer is a key component to ensure the safe operation of the device. During the spraying operation, when the liquid outlet is manually closed or blocked by foreign objects, resulting in an abnormal increase in the pressure in the liquid outlet cavity, if these pressures are not released in time, it may cause damage to the device itself or the operator. Therefore, the role of the pressure relief valve is particularly important. The pressure relief valve includes a manual pressure relief valve and an automatic pressure relief valve. The manual pressure relief valve requires the operator to actively intervene and manually operate to open or close the pressure relief channel to control the pressure in the liquid outlet cavity. The automatic pressure relief valve does not require manual intervention. When the pressure in the liquid outlet cavity exceeds the set value, the valve body will automatically open to release the excess pressure. When the pressure drops to the safe range, the valve body will automatically close.

[0003] Currently, when the pressure in the liquid outlet cavity exceeds the set value, the automatic pressure relief valve will open to allow some liquid flow or gas to flow back to the low-pressure area (such as the liquid tank) through the pressure relief channel, thereby reducing the pressure in the liquid outlet cavity. However, during the operation of the sprayer, the pressure in the liquid outlet cavity may fluctuate due to various factors (such as liquid flow rate, nozzle blockage, etc.). The pressure set value of the existing automatic pressure relief valve is usually fixed, which means that it can only open the pressure relief when the pressure reaches or exceeds the pressure set value, and cannot relieve the pressure flexibly according to different pressures, having certain limitations. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a new type of sprayer with a self-unloading structure for the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to relieve the pressure flexibly according to different pressures.

[0005] The above technical objectives of the present utility model can be achieved through the following technical solutions: A new type of sprayer with a self-unloading structure, including a plunger pump, a crankshaft is arranged inside the plunger pump, the crankshaft is connected to an external power source, a pressure relief port is arranged on the plunger pump, and a pressure relief device is arranged at the pressure relief port. The pressure relief device includes a housing, a valve body, a valve seat, an adjusting member, a plug one, a plug two, a spring one, a spring two, and a spring three. The valve body, the plug one, and the plug two are all slidably arranged inside the housing. The end of the plug one abuts against the end of the valve body. The adjusting member is used to adjust the position of the plug one inside the housing. The valve seat is arranged inside the housing. The housing is provided with a liquid inlet, a liquid return port, and a liquid outlet. The liquid inlet is communicated with the pressure relief port. A liquid passing hole one is opened on the valve seat, and the liquid passing hole one communicates the liquid inlet with the liquid return port. The plug one can block the liquid passing hole one. The spring one is arranged inside the housing and is used to support the plug one. A liquid passing hole two is opened on the valve body, and the liquid passing hole two communicates the liquid inlet with the liquid outlet. The plug two can block the liquid passing hole two. The spring two is arranged inside the housing and is used to support the valve body. The spring three is arranged inside the valve body and is used to reset the plug two.

[0006] In the above-mentioned new type of sprayer with a self-unloading structure, the adjusting member includes an adjusting cap, an adjusting rod, and an adjusting block. The adjusting cap is connected to the adjusting rod. The adjusting rod is threadedly connected to the housing. The adjusting block is slidably arranged inside the housing. A sliding groove is opened on the adjusting block. The end of the adjusting rod is inserted into the sliding groove and the two are slidably matched. The adjusting rod can push the adjusting block to slide. The adjusting block is connected to the plug one.

[0007] In the above-mentioned new type of sprayer with a self-unloading structure, a communicating hole one is opened on the side wall of the valve body. The communicating hole one is communicated with the liquid inlet. The liquid passing hole two can be communicated with the communicating hole one.

[0008] In the above-mentioned new type of sprayer with a self-unloading structure, a communicating hole two is opened on the side wall of the plug two. The liquid passing hole two can be communicated with the communicating hole two. The communicating hole two is communicated with the liquid outlet.

[0009] In the above-mentioned new type of sprayer with a self-unloading structure, a positioning seat is connected to the adjusting rod. One end of the spring one abuts against or is connected to the positioning seat, and the other end of the spring one abuts against or is connected to the adjusting block.

[0010] In the above-mentioned new type of sprayer with a self-unloading structure, one end of the spring two abuts against or is connected to the end of the valve body, and the other end of the spring two abuts against or is connected to the inner side wall of the housing.

[0011] In the above-mentioned new type of sprayer with a self-unloading structure, a limiting piece is arranged inside the valve body. One end of the third spring abuts against or is connected to the end of the second plug, and the other end of the third spring abuts against or is connected to the end face of the limiting piece.

[0012] In the above-mentioned new type of sprayer with a self-unloading structure, a limiting step is arranged inside the housing, and the end of the first plug can abut against the step surface of the limiting step.

[0013] In the above-mentioned new type of sprayer with a self-unloading structure, a first arc surface is arranged at the end of the first plug, and a second arc surface is arranged at the end of the second plug.

[0014] In the above-mentioned new type of sprayer with a self-unloading structure, the housing includes a left main body and a right main body. The left main body and the right main body are assembled to form the housing. The left main body and the right main body are detachably connected, and the left main body and the right main body cooperate to clamp the valve seat.

[0015] In summary, the beneficial effects of the present utility model compared with the prior art are as follows:

[0016] The first spring supports the first plug, and the second spring supports the valve body. The end of the first plug abuts against the end of the valve body, so that in the normal state, the position of the first plug remains stable. By adjusting the position of the first plug in the housing through the adjusting member, the first plug can block the liquid passing hole or control the opening degree of the first liquid passing hole. As the position of the first plug changes, the pre-tightening force applied by the first spring to the first plug changes, and the pre-tightening force applied by the second spring to the valve body also changes accordingly, and the opening degree of the first liquid passing hole changes, so as to realize the adjustment of the pressure set value. When the pressure gradually increases, the water flow overcomes the pre-tightening force of the first spring and pushes the first plug, so that the opening degree of the first liquid passing hole changes. The liquid in the plunger pump enters the housing through the pressure relief port and the liquid inlet, and the liquid flows to the liquid return port through the first liquid passing hole and flows out from the liquid return port to reduce the internal pressure. When the pressure rises to a higher level, the liquid overcomes the pre-tightening force of the third spring and pushes the second plug, so that the second liquid passing hole is opened, and the liquid flows to the liquid outlet through the second liquid passing hole and flows out from the liquid outlet to reduce the internal pressure. When the internal pressure drops to the safe range, the third spring makes the second plug reset, and the second plug re-blocks the second liquid passing hole, so as to realize flexible pressure relief according to different pressures. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the embodiment;

[0018] Figure 2 It is a schematic structural diagram of the pressure relief device of the embodiment;

[0019] Figure 3 It is a sectional view of the pressure relief device of the embodiment;

[0020] Figure 4 It is a partial structural schematic diagram of an embodiment.

[0021] Reference numerals: 1, plunger pump; 2, crankshaft; 3, pressure relief port; 4, pressure relief device; 41, housing; 411, left main body; 412, right main body; 42, valve body; 43, valve seat; 44, adjusting member; 441, adjusting cap; 442, adjusting rod; 443, adjusting block; 45, plug one; 46, plug two; 47, spring one; 48, spring two; 49, spring three; 5, liquid inlet; 6, liquid return port; 7, liquid outlet; 8, liquid passage hole one; 9, liquid passage hole two; 10, communication hole one; 11, communication hole two; 12, positioning seat; 13, limiting piece; 14, limiting step; 15, arc surface one; 16, arc surface two; 17, chute. Detailed implementation manners

[0022] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0023] A new type of sprayer with a self-unloading structure, as Figures 1 to 4 shown, includes a plunger pump 1. A crankshaft 2 is arranged in the plunger pump 1, and the crankshaft 2 is connected to an external power source. It should be noted that the connection manner between the plunger pump 1, the external power source, and the crankshaft 2 and the external power source belongs to common knowledge and will not be elaborated herein.

[0024] A pressure relief port 3 is arranged on the plunger pump 1, and a pressure relief device 4 is arranged at the pressure relief port 3. The pressure relief device 4 includes a housing 41, a valve body 42, a valve seat 43, an adjusting member 44, a plug one 45, a plug two 46, a spring one 47, a spring two 48, and a spring three 49.

[0025] The housing 41 includes a left main body 411 and a right main body 412. The left main body 411 and the right main body 412 are joined to form the housing 41, and the left main body 411 and the right main body 412 are detachably connected. Specifically, in this embodiment, the left main body 411 and the right main body 412 are connected by a plurality of bolts.

[0026] The valve seat 43 is arranged in the housing 41. Specifically, the left main body 411 and the right main body 412 cooperate to clamp the valve seat 43, thereby ensuring the stable position of the valve seat 43 in the housing 41.

[0027] The valve body 42, the plug one 45, and the plug two 46 are all slidably arranged in the housing 41, and the end of the plug one 45 abuts against the end of the valve body 42.

[0028] The adjusting member 44 is used to adjust the position of the first plug 45 within the housing 41. Specifically, in this embodiment, the adjusting member 44 includes an adjusting cap 441, an adjusting rod 442, and an adjusting block 443. The adjusting cap 441 is connected to the adjusting rod 442, the adjusting rod 442 is threadedly connected to the housing 41, the adjusting block 443 is slidably disposed within the housing 41, a sliding groove 14 is formed on the adjusting block 443, the end of the adjusting rod 442 is inserted into the sliding groove 14 and they are in sliding fit. The adjusting rod 442 can push the adjusting block 443 to slide, the adjusting block 443 is connected to the first plug 45. By rotating the adjusting cap 441, the adjusting cap 441 drives the adjusting rod 442 to rotate. As the adjusting rod 442 rotates, it moves along its own axis direction until the end of the adjusting rod 442 abuts against the bottom surface of the sliding groove 14 and pushes the adjusting block 443 and the first plug 45 to move, thereby adjusting the position of the first plug 45.

[0029] The first spring 47 is disposed within the housing 41 and is used to support the first plug 45. Specifically, a positioning seat 12 is connected to the adjusting rod 442, one end of the first spring 47 abuts against or is connected to the positioning seat 12, and the other end of the first spring 47 abuts against or is connected to the adjusting block 443.

[0030] The second spring 48 is disposed within the housing 41 and is used to support the valve body 42. Specifically, one end of the second spring 48 abuts against or is connected to the end of the valve body 42, and the other end of the second spring 48 abuts against or is connected to the inner side wall of the housing 41.

[0031] The third spring 49 is disposed within the valve body 42 and is used to reset the second plug 46. A limiting piece 13 is disposed within the valve body 42, one end of the third spring 49 abuts against or is connected to the end of the second plug 46, and the other end of the third spring 49 abuts against or is connected to the end face of the limiting piece 13.

[0032] The housing 41 is provided with a liquid inlet 5, a liquid return port 6, and a liquid outlet 7. The liquid inlet 5 is communicated with the pressure relief port 3. A first liquid through hole 8 is formed on the valve seat 43, and the first liquid through hole 8 communicates the liquid inlet 5 and the liquid return port 6. The first plug 45 can block the first liquid through hole 8. Further, an arc surface 15 is provided at the end of the first plug 45, and the arc surface 15 enables the first plug 45 to effectively seal the first liquid through hole 8. A second liquid through hole 9 is formed on the valve body 42, and the second liquid through hole 9 communicates the liquid inlet 5 and the liquid outlet 7. The second plug 46 can block the second liquid through hole 9. Further, an arc surface 16 is provided at the end of the second plug 46, and the arc surface 16 enables the second plug 46 to effectively seal the second liquid through hole 9.

[0033] A communication hole 10 is provided on the side wall of the valve body 42. The communication hole 10 is communicated with the liquid inlet 5. The liquid passage hole 9 can be communicated with the communication hole 10. A communication hole 11 is provided on the side wall of the plug 46. The liquid passage hole 9 can be communicated with the communication hole 11. The communication hole 11 is communicated with the liquid outlet 7.

[0034] Liquid can flow from the communication hole 10 to the liquid passage hole 9, and then through the liquid passage hole 9 and then through the communication hole 11 to the liquid outlet 7, and finally flow out from the liquid outlet 7.

[0035] A limiting step 14 is provided in the housing 41. The end of the plug 45 can abut against the step surface of the limiting step 14, so as to limit the position of the plug 45. And because the end of the plug 45 abuts against the end of the valve body 42, the position of the valve body 42 is restricted accordingly.

[0036] It should be noted that the first spring 47 supports the plug 45, and the second spring 48 supports the valve body 42. The end of the plug 45 abuts against the end of the valve body 42, so that the position of the plug 45 remains stable under normal conditions.

[0037] The position of the plug 45 in the housing 41 is adjusted by the adjusting member 44. The plug 45 can block the liquid passage hole 8 or control the opening degree of the liquid passage hole 8. As the position of the plug 45 changes, the pre-tightening force applied by the first spring 47 to the plug 45 changes, and the pre-tightening force applied by the second spring 48 to the valve body 42 also changes accordingly, and the opening degree of the liquid passage hole 8 changes, so as to adjust the set pressure value.

[0038] The water flow overcomes the pre-tightening force of the first spring 47 to push the plug 45, so that the opening degree of the liquid passage hole 8 changes, and it can also push the valve body 42, so that the valve body 42 pushes the plug 45 to slide, thereby changing the opening degree of the liquid passage hole 8. It should be noted that when the pressure increases, the liquid in the plunger pump 1 enters the housing 41 through the pressure relief port 3 and the liquid inlet 5. The liquid flows through the liquid passage hole 8 to the return liquid port 6 and flows out from the return liquid port 6 to reduce the internal pressure. When the pressure rises to a higher level, the liquid overcomes the pre-tightening force of the third spring 49 to push the plug 46, so that the liquid passage hole 9 is opened. The liquid flows through the liquid passage hole 9 to the liquid outlet 7 and flows out from the liquid outlet 7 to reduce the internal pressure. When the internal pressure drops to the safe range, the third spring 49 resets the plug 46, and the plug 46 re-blocks the liquid passage hole 9, so as to achieve flexible pressure relief according to different pressures.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the present utility model; those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A novel sprayer with a self-unloading structure, comprising a plunger pump (1), wherein a crankshaft (2) is arranged inside the plunger pump (1), and the crankshaft (2) is connected to an external power source, characterized in that: The plunger pump (1) is provided with a pressure relief port (3), and the pressure relief port (3) is provided with a pressure relief device (4). The pressure relief device (4) comprises a housing (41), a valve body (42), a valve seat (43), an adjusting member (44), a plug 1 (45), a plug 2 (46), a spring 1 (47), a spring 2 (48) and a spring 3 (49). The valve body (42), the plug 1 (45) and the plug 2 (46) are all slidably arranged in the housing (41), and the end of the plug 1 (45) abuts against the end of the valve body (42). The adjusting member (44) is used to adjust the position of the plug 1 (45) in the housing (41). The valve seat (43) is arranged in the housing (41). The housing (41) is provided with a liquid inlet (5), a liquid return port (6) and a liquid outlet. (7), the liquid inlet (5) is connected to the pressure relief port (3), the valve seat (43) is provided with a liquid through hole (8), the liquid through hole (8) connects the liquid inlet (5) and the liquid return port (6), the plug (45) can block the liquid through hole (8), the spring (47) is arranged in the shell (41) and is used to support the plug (45), the valve body (42) is provided with a liquid through hole (9), the liquid through hole (9) connects the liquid inlet (5) and the liquid outlet (7), the plug (46) can block the liquid through hole (9), the spring (48) is arranged in the shell (41) and is used to support the valve body (42), and the spring (49) is arranged in the valve body (42) and is used to reset the plug (46).

2. A novel sprayer with a self-unloading structure according to claim 1, characterized in that: The adjusting member (44) comprises an adjusting cap (441), an adjusting rod (442) and an adjusting block (443); the adjusting cap (441) is connected to the adjusting rod (442); the adjusting rod (442) is threadedly connected to the housing (41); the adjusting block (443) is slidably arranged in the housing (41); a sliding groove is provided on the adjusting block (443); the end of the adjusting rod (442) is inserted into the sliding groove and the two are slidably matched; the adjusting rod (442) can push the adjusting block (443) to slide; and the adjusting block (443) is connected to the plug (45).

3. A novel sprayer with a self-unloading structure according to claim 1, characterized in that: A connecting hole (10) is provided on the side wall of the valve body (42), wherein the connecting hole (10) is connected to the liquid inlet (5), and the liquid connecting hole (9) can be connected to the connecting hole (10).

4. A novel sprayer with a self-unloading structure according to claim 1, characterized in that: A second communicating hole (11) is provided on the side wall of the second plug (46), the second liquid passage hole (9) can be connected to the second communicating hole (11), and the second communicating hole (11) is connected to the liquid outlet (7).

5. A novel sprayer with a self-unloading structure according to claim 2, characterized in that: The adjusting rod (442) is connected to a positioning seat (12), one end of the spring (47) abuts against or is connected to the positioning seat (12), and the other end of the spring (47) abuts against or is connected to the adjusting block (443).

6. A novel sprayer with a self-unloading structure according to claim 1, characterized in that: One end of the second spring (48) abuts against or is connected to the end of the valve body (42), and the other end of the second spring (48) abuts against or is connected to the inner wall of the housing (41).

7. A novel sprayer with a self-unloading structure according to claim 1, characterized in that: A limiting plate (13) is arranged in the valve body (42), one end of the spring three (49) abuts against or is connected to the end of the plug two (46), and the other end of the spring three (49) abuts against or is connected to the end surface of the limiting plate (13).

8. The novel sprayer with a self-unloading structure according to claim 1 is characterized in that: A limiting step (14) is arranged in the housing (41), and the end of the first plug (45) can abut against the step surface of the limiting step (14).

9. The novel sprayer with a self-unloading structure according to claim 1, characterized in that: The end of the first plug (45) is provided with an arc-shaped surface one (15), and the end of the second plug (46) is provided with an arc-shaped surface two (16).

10. The novel sprayer with a self-unloading structure according to claim 1, characterized in that: The shell (41) includes a left main body (411) and a right main body (412). The left main body (411) and the right main body (412) are assembled to form the shell (41). The left main body (411) and the right main body (412) are detachably connected, and the left main body (411) and the right main body (412) cooperate to clamp the valve seat (43).

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