A valve, flushing system and method for parts flushing

Abstract

This invention belongs to the field of aerospace parts cleaning and discloses a valve, cleaning system, and cleaning method for cleaning parts. The valve includes a valve body and inlet and outlet end caps at both ends of the valve body. A piston is inserted into the valve body, and an elastic reset mechanism is fitted on the piston. Using this valve eliminates the need to design and equip dedicated cleaning fixtures and cleaning boxes for each part. With the adjustable piston and outlet end cap, it can adapt to the cleaning needs of parts of different specifications or structures, thereby significantly reducing the cleaning workload and improving cleaning efficiency. This valve uses the oil supply passage and elastic reset mechanism inside the piston to control the flow of the cleaning medium, eliminating the need to rely on compressed air to drive the valve's expansion and contraction. This not only simplifies the complexity of the equipment but also avoids the problem of unstable compressed air supply affecting the continuity and efficiency of the cleaning process, ensuring the stability of the cleaning process and the consistency of the cleaning effect.

Description

Technical Field

[0001] This invention belongs to the field of machining, specifically relating to the field of aerospace parts rinsing, and particularly to a valve, rinsing system and rinsing method for parts rinsing. Background Technology

[0002] After the machining process of aircraft shell parts is completed, in order to ensure that the surface cleanliness of the parts meets the requirements and that there are no foreign objects in the internal cavities, high-temperature and high-pressure kerosene is traditionally used as a flushing medium to thoroughly clean the parts. This step is crucial because it directly affects the reliability and performance of the parts in subsequent assembly and use. When developing a parts flushing plan, it is necessary to accurately determine the flushing inlet position, flushing sequence, and necessary sealing positions. These are all key elements to ensure the flushing effect.

[0003] Currently, the main flushing measures involve designing a dedicated flushing fixture based on the flushing plan, such as... Figure 1 As shown, part 103 is placed in a dedicated rinsing fixture 102, and then into a rinsing box 101. The rinsing process controls the airflow, thereby controlling the extension and retraction of the valve core in the rinsing box 101, to rinse part 103 according to the rinsing plan. This method relies on compressed air to drive the valve's extension and retraction, such as... Figure 2 As shown, air enters through inlet 1, air inlet 2 is open, the valve core extends and presses against the housing, and oil enters through the oil inlet, thus realizing the oil supply and rinsing of the housing by the flushing machine; as shown Figure 3 As shown, the oil inlet stops supplying oil, air inlet 1 opens, air inlet 2 allows air to enter, the valve core retracts, and this hole on the housing allows oil to exit from other inlets. Therefore, it is evident that existing flushing measures have certain limitations, specifically: First, for each part of different specifications or structures, a dedicated flushing fixture and corresponding flushing box must be designed and equipped, increasing the flushing workload and reducing flushing efficiency; Second, the flushing box relies on compressed air to drive the valve's expansion and contraction to control the flow of the flushing medium. This reliance not only increases equipment complexity but may also affect the continuity and efficiency of the flushing process due to the instability of the compressed air supply, easily impacting the flushing effect.

[0004] It is evident that the existing rinsing methods used for rinsing aerospace parts are not only incompatible with current methods but also involve high equipment complexity, which greatly affects the rinsing efficiency and effectiveness. Summary of the Invention

[0005] This invention provides a valve, a flushing system, and a flushing method for rinsing parts, in order to solve the technical problem that existing flushing measures for aerospace parts are not only poorly versatile but also have high equipment complexity, which greatly affects the flushing efficiency and effect.

[0006] To achieve the above objectives, the present invention employs the following technical content:

[0007] A valve for flushing parts, comprising a valve body;

[0008] One end of the valve body is provided with an inlet end cap for connecting to a flushing machine, and the other end is provided with an outlet end cap for connecting parts.

[0009] A piston is inserted into the cavity of the valve body, with one end of the piston located on one side of the inlet end cover and the other end inserted into the outlet end cover;

[0010] The piston has an oil supply passage inside, one end of which is connected to the inlet of the inlet end cap, and the other end of which is provided with an oil supply port.

[0011] The outlet end cap is provided with an oil drain port. When the oil supply is stopped, the oil drain port is always connected to the valve body cavity and can discharge the oil from the oil drain port to the outside through the valve body cavity.

[0012] The piston is fitted with an elastic reset mechanism. When the piston is in the oil supply state, it can compress the elastic reset mechanism, so that the oil supply port, the outlet end cap and the parts form an oil inlet passage and block the oil outlet. When the oil supply ends, the elastic reset mechanism drives the piston to return to the initial position by rebounding.

[0013] Furthermore, the opening direction of the oil supply port and the oil drain port is perpendicular to each other.

[0014] Furthermore, the inner cavity of the outlet end cap is arranged in a stepped structure along the oil supply direction, including a first cavity and a second cavity that are connected. The inner diameter of the first cavity is smaller than the inner diameter of the second cavity. The piston is arranged close to the inner wall of the first cavity. The oil outlet is opened on the first cavity. When the oil supply port moves from the first cavity to the second cavity, the oil supply port is connected to the component.

[0015] Furthermore, the elastic reset mechanism employs a spring, with one end of the spring abutting against the piston end face and the other end abutting against the piston end face.

[0016] Furthermore, the spring is made of one of the following materials: SUS304 stainless steel, SUS316 stainless steel, and SUS631 stainless steel.

[0017] Furthermore, at least one oil drain hole communicating with the outside is provided on the periphery of the valve body.

[0018] Furthermore, the valve body, the inlet end cap, the piston, and the outlet end cap are arranged coaxially.

[0019] A flushing system includes a plurality of valves for flushing the aforementioned parts and a flushing machine; the number of valves for flushing the parts corresponds one-to-one with the holes to be flushed on the parts; the flushing machine is connected to each of the valves for flushing the parts via an oil supply line.

[0020] A flushing method, based on the aforementioned valve for flushing parts, includes:

[0021] The flushing machine starts supplying oil. The oil enters the piston oil supply passage through the inlet end cover, pushing the piston to move towards the outlet end cover. The piston compresses the elastic reset mechanism.

[0022] When the oil supply port, outlet end cap and parts form an oil inlet passage, the parts are flushed.

[0023] After the rinsing operation is completed, the rinsing machine stops supplying oil, and the elastic reset mechanism automatically rebounds, driving the piston to return to the initial position, so that the oil outlet is connected to the valve body cavity, and the oil from the oil outlet is discharged to the outside through the valve body cavity.

[0024] Furthermore, the oil supply pressure of the flushing machine is 0.8 to 1 MPa.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention provides a valve for rinsing parts. The valve includes a valve body and inlet and outlet end caps at both ends of the valve body. A piston is inserted into the valve body, and an elastic reset mechanism is fitted onto the piston. When oil is supplied, the piston can compress the elastic reset mechanism, forming an oil inlet passage between the piston's oil inlet, the outlet end cap, and the part, and sealing the oil outlet of the outlet end cap. When oil supply ends, the elastic reset mechanism rebounds, causing the piston to return to its initial position, allowing the oil outlet to connect with the valve body cavity to discharge the oil to the outside. Using this valve eliminates the need for designing and equipping dedicated rinsing fixtures and rinsing boxes for each part. With the adjustable piston and outlet end cap, it can adapt to the rinsing needs of parts of different specifications or structures, significantly reducing rinsing workload and improving rinsing efficiency. This valve utilizes the oil supply passage and elastic reset mechanism inside the piston to control the flow of the rinsing medium, eliminating the need for compressed air to drive the valve's expansion and contraction. This simplifies equipment complexity and avoids the problem of unstable compressed air supply affecting the continuity and efficiency of the rinsing process, ensuring the stability of the rinsing process and the consistency of the rinsing effect.

[0027] Preferably, in this invention, the opening directions of the oil supply port and the oil discharge port are set perpendicularly. During the piston movement, this effectively prevents oil from leaking out of the oil discharge port when the piston oil supply and discharge ports meet, ensuring stable and reliable operation of the oil flushing operation.

[0028] Preferably, in this invention, the stepped structure design of the inner cavity of the outlet end cap allows the piston to gradually change the position of the oil supply port during movement, thereby more accurately controlling the flow direction and flow rate of the flushing medium, improving the uniformity and efficiency of flushing. Furthermore, the piston is set close to the inner wall of the first cavity, which is equivalent to sealing the oil supply port before entering the second cavity, overcoming the problem of premature leakage of oil from the oil supply port and ensuring reliable operation of the flushing operation.

[0029] Preferably, in this invention, a spring is used as the elastic reset mechanism, which has a simple structure, low cost, and good resilience and durability, ensuring the stable movement of the piston in the oil supply and oil supply termination states.

[0030] Preferably, in this invention, the spring is made of a specific material, such as SUS304 stainless steel, SUS316 stainless steel and SUS631 stainless steel, which has good corrosion resistance and high temperature resistance, is suitable for various harsh working environments, and extends the service life of the valve.

[0031] Preferably, in this invention, an oil drain hole is provided on the valve body so that impurities and excess oil generated during the flushing process can be discharged in a timely manner, ensuring the stable operation of the flushing operation of other holes to be flushed on the housing parts.

[0032] Preferably, in this invention, the valve body, inlet end cap, piston, and outlet end cap are arranged coaxially to ensure unobstructed flow in the valve's internal flow path, thereby improving the flow efficiency and flushing effect of the flushing medium.

[0033] This invention also provides a rinsing system, including the aforementioned valves for rinsing parts. The system further includes multiple valves for rinsing parts and a rinsing machine connected to the valves. The number of valves for rinsing parts corresponds one-to-one with the holes to be rinsed on the parts. Using this rinsing system, it is applicable to the rinsing operations of aircraft shell parts of different specifications and sizes, solving the problem of poor versatility of traditional rinsing equipment. Moreover, only the impact machine and valves are needed to achieve the rinsing operations of different holes to be rinsed, reducing the rinsing complexity and greatly improving the rinsing efficiency and effect of parts.

[0034] The present invention also provides a rinsing method. Based on the above-mentioned valve for rinsing parts, this method precisely controls the oil supply and stop time of the rinsing machine, as well as the movement position of the piston, thereby achieving precise rinsing of parts and improving rinsing quality and efficiency.

[0035] Preferably, in this invention, the oil supply pressure range of the flushing machine is specified (0.8 ~ 1 MPa) to ensure that the oil enters the valve body through the inlet end cap. The oil supply pressure overcomes the elastic force to push the piston to move. When the piston enters the left side of the outlet end cap, the oil supply state is balanced, and reliable and stable oil supply to the parts is achieved. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a conventional parts flushing system provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the oil supply system for a conventional parts flushing system provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the shutdown of oil supply in a conventional parts flushing system provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of a valve for rinsing parts provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the valve body structure of a valve for flushing parts provided in an embodiment of the present invention, wherein (a) is a front view; and (b) is a side sectional view.

[0041] Figure 6 This is a schematic diagram of the piston structure of a valve for flushing parts provided in an embodiment of the present invention, wherein (a) is a front view; and (b) is a side sectional view.

[0042] Figure 7 This is a schematic diagram of the inlet end cap structure of a valve for rinsing parts provided in an embodiment of the present invention; wherein, (a) is a front view; and (b) is a side sectional view;

[0043] Figure 8 This is a schematic diagram of the structure of the outlet end cap of a valve for rinsing parts provided in an embodiment of the present invention; wherein, (a) is a front view; and (b) is a side sectional view;

[0044] Figure 9 This is a schematic diagram of the oil supply of a valve for flushing parts, provided in an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of an oil draining valve for flushing parts, provided as an embodiment of the present invention.

[0046] Figure label:

[0047] 1. Inlet end cap, 2. Valve body, 3. Piston, 4. Spring, 5. Outlet end cap, 6. Oil supply port, 7. Oil drain port;

[0048] 101. Rinse box; 102. Rinse fixture; 103. Parts. Detailed Implementation

[0049] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0053] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0056] Example 1

[0057] As mentioned in the background section, current flushing measures mainly involve designing a dedicated flushing fixture based on the flushing plan, such as... Figure 1 As shown, part 103 is placed in a dedicated rinsing fixture 102, and then into a rinsing box 101. The rinsing process controls the airflow, thereby controlling the extension and retraction of the valve core in the rinsing box 101, to rinse part 103 according to the rinsing plan. This method relies on compressed air to drive the valve's extension and retraction, such as... Figure 2 As shown, air enters through inlet 1, air inlet 2 is open, the valve core extends and presses against the housing, and oil enters through the oil inlet, thus realizing the oil supply and rinsing of the housing by the flushing machine; as shown Figure 3 As shown, the oil inlet stops supplying oil, air inlet 1 opens, air inlet 2 allows air to enter, the valve core retracts, and this hole on the housing allows oil to exit from other inlets. Therefore, it is evident that existing flushing measures have certain limitations, specifically: First, for each part of different specifications or structures, a dedicated flushing fixture and corresponding flushing box must be designed and equipped, increasing the flushing workload and reducing flushing efficiency; Second, the flushing box relies on compressed air to drive the valve's expansion and contraction to control the flow of the flushing medium. This reliance not only increases equipment complexity but may also affect the continuity and efficiency of the flushing process due to the instability of the compressed air supply, easily impacting the flushing effect.

[0058] To address the aforementioned problems, this invention provides a valve for rinsing parts. Using this valve, the valve and the part are directly connected. The valve is controlled by oil supply pressure; when the rinsing machine supplies oil, the valve supplies oil to the housing; when the rinsing machine stops supplying oil, the valve allows oil to exit through other oil inlets on the housing. Based on this valve, a new rinsing method for complex housings is formed.

[0059] like Figure 1 As shown, this embodiment provides a valve for flushing parts. The core component of this valve is the valve body 2, as follows: Figure 5 As shown, specifically as follows Figure 5 (a) and Figure 5 As shown in (b), valve body 2 is used to connect to and support other components. For example... Figure 7 and Figure 8 As shown, specifically as follows Figure 7 As shown in (a), 7(b) and 8(a) and 8(b), one end of the valve body 2 is connected to the flushing machine through the inlet end cap 1, ensuring the input of flushing fluid (oil); the other end is connected to the part 103 to be flushed through the outlet end cap 5, realizing the effective transfer of flushing fluid.

[0060] like Figure 6 As shown, specifically as follows Figure 6 (a) Figure 6 As shown in (b), a piston 3 is inserted into the internal cavity of the valve body. One end of the piston 3 is close to the inlet end cap 1, and the other end extends into the outlet end cap 5.

[0061] In this embodiment, an oil supply passage is designed inside the piston 3. One end of the oil supply passage is directly connected to the inlet of the inlet end cap 1, and the other end is provided with an oil supply port 6 in a vertical opening direction to control the outflow of flushing fluid.

[0062] Combination Figure 8 As shown, an oil drain port 7 is provided on the outlet end cap 5. The design of the oil drain port 7 ensures that the oil in the cavity of the valve body 2 can be smoothly discharged after flushing.

[0063] In this embodiment, when in the initial state or after the oil supply is stopped, the oil drain port 7 is always connected to the cavity of the valve body 2.

[0064] To ensure that piston 3 can return to its initial state after flushing, this embodiment is equipped with an elastic reset mechanism for piston 3.

[0065] During flushing, piston 3 compresses the elastic reset mechanism, creating a clear oil inlet path between the oil supply port 6, the outlet end cap 5, and part 103, while piston 3 itself blocks the oil outlet port 7. When flushing is complete, the elastic reset mechanism uses its own elasticity to push the piston back to its initial position, preparing for the next flush.

[0066] In this embodiment, the elastic reset mechanism uses spring 4; in order to extend the service life of valve 2, the elastic reset mechanism is preferably made of SUS304 stainless steel, SUS316 stainless steel and SUS631 stainless steel, so that it has good corrosion resistance and high temperature resistance.

[0067] In this embodiment, the opening directions of the oil supply port 6 and the oil drain port 7 are perpendicular to each other and set at 90° to avoid liquid leakage during the flushing process; the inner cavity of the outlet end cap 5 adopts a stepped structure design, which optimizes the movement trajectory of the piston and ensures that the flushing fluid can be accurately delivered to the parts.

[0068] In this embodiment, at least one oil drain hole is also provided around the valve body to further ensure the smooth discharge of oil after flushing.

[0069] In this embodiment, the valve body 2, inlet end cap 1, piston 3 and outlet end cap 5 are coaxially arranged to ensure the overall stability of the valve and the flushing effect.

[0070] This embodiment provides a method for using a valve for flushing parts, as detailed below:

[0071] When the flushing machine is not supplying oil, the spring 4 keeps the piston 3 at its rightmost position. The piston 3 is located to the right of the outlet end cover 5, and the valve body 2 has an oil drain hole that connects to the outside. When the flushing machine supplies oil, the oil flows into the valve body 2 through the inlet end cover 1. The oil pressure overcomes the spring 4 and pushes the piston 3 to the left. When the piston rod of the piston 3 enters the left side of the outlet end cover 5, oil is supplied to the part 103 (the oil supply port 6 on the piston rod and the hole on the outlet end cover 5 are distributed at a 90-degree angle). When the flushing machine stops supplying oil, the spring 4 moves the piston 3 to the right. When the piston rod enters the right side of the outlet end cover 5, the oil from other oil inlets on the valve body 2 enters the valve body 2 through the outlet end cover 5 and connects to the outside through the oil drain hole, thus allowing the oil to flow out.

[0072] like Figure 9 As shown, when the flushing machine supplies oil, the oil flows into the valve body 2 through the inlet end cover 1. The oil pressure overcomes the elastic force and pushes the piston 3 to move to the left. When the piston rod enters the left side of the outlet end cover 5, oil is supplied to the part 103.

[0073] like Figure 10 As shown, when the flushing machine does not supply oil, the spring force of the spring 4 fixes the piston 3 at the rightmost end, and the piston rod outlet is sealed inside the outlet end cover 5; at the same time, the inner cavity of the part 103 is connected to the outside through the oil drain hole on the outlet end cover 5 and the valve body 2, thereby allowing the oil to leak out.

[0074] This embodiment provides a valve for flushing parts. This valve enables flushing of parts and is applicable to various specifications and sizes of aircraft shell parts, eliminating the reliance on special tooling and greatly improving versatility. At the same time, traditional flushing methods use gas for active control, while the use of this valve can achieve automatic oil discharge through structural optimization, improving efficiency and reducing costs.

[0075] Example 2

[0076] This embodiment also provides a rinsing system, which includes multiple parts rinsing valves provided in Embodiment 1 and a rinsing machine connected to each parts rinsing valve. The rinsing machine is connected to each parts rinsing valve through an oil supply pipeline.

[0077] This embodiment also provides a working method based on the above-described flushing system, the specific steps of which are as follows:

[0078] First, connect the flushing machine to the valves for flushing each part;

[0079] The flushing machine starts supplying oil. The oil enters the oil supply passage of piston 3 through the inlet end cover 1, pushing piston 3 to move towards outlet end cover 5. Piston 3 compresses the elastic reset mechanism.

[0080] When the oil supply port 6, the outlet end cap 5 and the part 103 form an oil inlet passage, the flushing operation of the part 103 begins.

[0081] After the rinsing operation is completed, the rinsing machine stops supplying oil, and the elastic reset mechanism automatically rebounds, driving the piston 3 to return to the initial position, so that the oil outlet 7 is connected to the cavity of the valve body 2, and the oil from the oil outlet 7 is discharged to the outside through the cavity of the valve body 2.

[0082] In this embodiment, the oil supply pressure of the flushing machine is 0.8 to 1 MPa. This ensures that the oil enters the valve body through the inlet end cap, and the oil supply pressure overcomes the elastic force to push the piston to move. When the piston enters the left side of the outlet end cap, the oil supply state is balanced, and reliable and stable oil supply to the parts is achieved.

[0083] In summary, the present invention provides a valve, a flushing system, and a flushing method for rinsing parts, which have the following advantages compared with existing flushing measures:

[0084] First, this invention provides a compact and fully functional valve for flushing parts. Through the movement of the piston within the valve body and the coordination of the elastic reset mechanism, precise control of the flushing medium is achieved, ensuring the stability and efficiency of the flushing process. Simultaneously, the coaxial design of the valve body ensures precise fit between components, further improving the flushing effect. Second, the oil inlet and outlet ports of this valve are vertically positioned, preventing liquid leakage during flushing and improving the valve's sealing performance. The stepped structure design of the outlet end cap optimizes the piston's movement trajectory, improving the flushing effect. The elastic reset mechanism in this invention uses a spring and is made of corrosion-resistant, high-strength stainless steel, ensuring the valve's durability and reliability. One end of the spring abuts against the piston end face, and the other end also abuts against the piston end face, achieving precise control of the piston through compression and rebound. Furthermore, the drain hole on the valve body allows residual oil to be smoothly discharged after flushing, ensuring stable operation of flushing operations for other holes on the parts. Finally, the present invention also provides a flushing system including multiple valves for flushing parts, and a flushing method based on the valves; through the coordinated operation of multiple valves, synchronous flushing of parts is achieved, which greatly improves flushing efficiency and flushing effect.

[0085] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A valve for flushing parts, characterized in that, Including valve body (2); One end of the valve body (2) is provided with an inlet end cap (1) for connecting to a flushing machine, and the other end is provided with an outlet end cap (5) for connecting parts (103). A piston (3) is inserted into the cavity of the valve body (2). One end of the piston (3) is located on one side of the inlet end cover (1), and the other end is inserted into the outlet end cover (5). The piston (3) has an oil supply passage inside. One end of the oil supply passage is connected to the inlet of the inlet end cap (1), and the other end of the oil supply passage is provided with an oil supply port (6). The outlet end cap (5) is provided with an oil drain port (7). When the oil supply is stopped, the oil drain port (7) is always connected to the cavity of the valve body (2) and can discharge the oil from the oil drain port (7) to the outside through the cavity of the valve body (2). The piston (3) is fitted with an elastic reset mechanism. When the piston (3) is in the oil supply state, it can compress the elastic reset mechanism and make the oil supply port (6), the outlet end cap (5) and the part (103) form an oil inlet passage and block the oil outlet (7). When the oil supply ends, the elastic reset mechanism drives the piston (3) to reset to the initial position by rebounding.

2. The valve for flushing parts according to claim 1, characterized in that, The oil supply port (6) and the oil drain port (7) are set in a perpendicular direction.

3. The valve for flushing parts according to claim 1, characterized in that, The inner cavity of the outlet end cap (5) is arranged in a stepped structure along the oil supply direction, including a first cavity and a second cavity that are connected. The inner diameter of the first cavity is smaller than the inner diameter of the second cavity. The piston (3) is arranged close to the inner wall of the first cavity. The oil outlet (7) is opened on the first cavity. When the oil supply port (6) moves from the first cavity to the second cavity, the oil supply port (6) is connected to the part (103).

4. The valve for flushing parts according to claim 1, characterized in that, The elastic reset mechanism uses a spring (4), one end of which abuts against the end face of the piston (3), and the other end abuts against the end face of the piston (3).

5. The valve for flushing parts according to claim 4, characterized in that, The spring (4) is made of one of the following materials: SUS304 stainless steel, SUS316 stainless steel and SUS631 stainless steel.

6. The valve for flushing parts according to claim 1, characterized in that, At least one oil drain hole communicating with the outside is provided on the periphery of the valve body.

7. The valve for flushing parts according to any one of claims 1-6, characterized in that, The valve body (2), the inlet end cap (1), the piston (3) and the outlet end cap (5) are coaxially arranged.

8. A flushing system, characterized in that, It includes multiple valves for rinsing parts as described in any one of claims 1-7 and a rinsing machine; the number of valves for rinsing parts corresponds one-to-one with the rinsing holes of the parts (103); the rinsing machine is connected to each of the valves for rinsing parts through an oil supply pipeline.

9. A rinsing method, characterized in that, The valve for flushing parts according to any one of claims 1-7 includes: The flushing machine starts supplying oil. The oil enters the oil supply passage of the piston (3) through the inlet end cap (1), pushing the piston (3) to move towards the outlet end cap (5). The piston (3) compresses the elastic reset mechanism. When the oil supply port (6), the outlet end cap (5) and the part (103) form an oil inlet passage, the part (103) is flushed. After the rinsing operation is completed, the rinsing machine stops supplying oil, and the elastic reset mechanism automatically rebounds, driving the piston (3) to reset to the initial position, so that the oil outlet (7) is connected to the cavity of the valve body (2), and the oil from the oil outlet (7) is discharged to the outside through the cavity of the valve body (2).

10. A rinsing method according to claim 9, characterized in that, The oil supply pressure of the flushing machine is 0.8 to 1 MPa.

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