Part flushing valve, flushing system and method

Abstract

The invention belongs to the field of aeronautical part flushing, and discloses a valve for part flushing, a flushing system and a flushing method.The valve comprises a valve body, an inlet end cover and an outlet end cover, the inlet end cover and the outlet end cover are arranged at the two ends of the valve body, and a piston is inserted into the valve body and sleeved with an elastic reset mechanism; by the adoption of the valve, a special flushing tool and a flushing square box do not need to be designed and arranged for each part, and the adjustable piston and the outlet end cover are matched, so that the flushing requirements of parts of different specifications or structures can be met; therefore, the flushing workload is obviously reduced, and the flushing efficiency is improved; according to the valve, the oil supply channel and the elastic reset mechanism in the piston are used for controlling circulation of a flushing medium, the valve does not need to be driven to stretch out and draw back through compressed air, the equipment complexity is simplified, the problem that the continuity and efficiency of the flushing process are affected due to unstable compressed air supply is solved, and the service life of the valve is prolonged. And the stability of the flushing process and the consistency of the flushing effect are ensured.

Description

Technical Field

[0001] The invention belongs to the field of mechanical processing, specifically relates to the field of aviation parts flushing, and in particular relates to a valve, a flushing system and a flushing method for parts flushing. Background Art

[0002] After the processing of aviation shell parts is completed, in order to ensure that the surface cleanliness of the parts meets the requirements and there is no foreign matter in the inner cavity, high-temperature and high-pressure kerosene is traditionally used as the flushing medium to thoroughly clean the parts. This step is crucial because it is directly related to the reliability and performance of the subsequent assembly and use of the parts. When formulating a part flushing plan, it is necessary to accurately determine the flushing inlet position of the parts, the flushing sequence, and the necessary blocking position, all of which are key factors to ensure the flushing effect.

[0003] At present, the flushing measures mainly adopt: design a set of special flushing tools according to the flushing plan, such as Figure 1 As shown, the part 103 is placed in a special flushing tool 102, and then placed in a flushing box 101; the flushing program controls the expansion and contraction of the valve core of the flushing box 101 by controlling the airflow, so as to flush the part 103 according to the flushing scheme. In this scheme, compressed air is required to drive the expansion and contraction of the valve, such as Figure 2 As shown, air is introduced into the air inlet 1, the air inlet 2 is open, the valve core is extended and pressed against the shell, and oil is introduced into the oil inlet at the same time, so that the flushing machine can supply oil to flush the shell; Figure 3 As shown, the oil inlet stops supplying oil, the air inlet 1 is opened, the air inlet 2 is intaken, the valve core is retracted, and at the same time, the hole on the shell is available for other inlets to discharge oil; it can be seen that the existing flushing measures have certain limitations, which are specifically reflected in: First, for each part with different specifications or structures, a set of special flushing tools and corresponding flushing boxes must be designed and equipped, which increases the flushing workload and reduces the flushing efficiency; second, the flushing box needs to rely on compressed air to drive the extension and retraction of the valve during operation to achieve the flow control of the flushing medium. This dependence not only increases the complexity of the equipment, but may also affect the continuity and efficiency of the flushing process due to the instability of the compressed air supply, which is easy to affect the flushing effect.

[0004] It can be seen that the existing flushing measures for flushing operations of aviation parts not only have poor versatility but also high equipment complexity, which greatly affects the flushing efficiency and flushing effect of the parts. Summary of the invention

[0005] The present invention provides a valve, a flushing system and a flushing method for parts flushing to solve the technical problem that the flushing operation for aviation parts is poor in versatility and high in equipment complexity, which greatly affects the flushing efficiency and flushing effect of parts.

[0006] In order to achieve the above object, the present invention adopts the following technical contents: A valve for parts flushing includes a valve body; One end of the valve body is provided with an inlet end cover for connecting to a flushing machine, and the other end is provided with an outlet end cover for connecting to a part; A piston is inserted into the cavity of the valve body, one end of the piston is located on one side of the inlet end cover, and the other end is inserted into the outlet end cover; An oil supply passage is provided inside the piston, one end of the oil supply passage is connected to the inlet of the inlet end cover, and the other end of the oil supply passage is provided with an oil supply port; The outlet end cover is provided with an oil discharge port, which is always connected to the valve body cavity when the oil supply is stopped, and can discharge the oil from the oil discharge port to the outside through the valve body cavity; An elastic reset mechanism is sleeved on the piston, and the piston can compress the elastic reset mechanism under the oil supply state, so that the oil supply port, the outlet end cover and the parts form an oil inlet passage, and the oil discharge port is blocked; when the oil supply is ended, the elastic reset mechanism drives the piston to return to the initial position through rebound.

[0007] Furthermore, the opening directions of the oil supply port and the oil discharge port are arranged in a perpendicular direction.

[0008] Furthermore, the inner cavity of the outlet end cover is arranged in a step structure along the oil supply direction, including a first cavity and a second cavity that are connected, and 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 discharge port 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 with the part.

[0009] Furthermore, the elastic reset mechanism adopts a spring, one end of the spring abuts against the piston end surface, and the other end of the spring abuts against the piston end surface.

[0010] Furthermore, the spring is made of one of SUS304 stainless steel, SUS316 stainless steel and SUS631 stainless steel.

[0011] Furthermore, at least one oil drain hole communicating with the outside is provided on the periphery of the valve body.

[0012] Furthermore, the valve body, the inlet end cover, the piston and the outlet end cover are coaxially arranged.

[0013] A flushing system comprises a plurality of the above-mentioned parts flushing valves and a flushing machine; the number of the parts flushing valves corresponds to the holes of the parts to be flushed; the flushing machine is connected with each of the parts flushing valves through an oil supply pipeline.

[0014] A flushing method, based on the above-mentioned parts flushing valve, comprises: The flushing machine starts to supply oil, and the oil enters the piston oil supply passage through the inlet end cover, pushing the piston to move toward the outlet end cover, and the piston compresses the elastic reset mechanism; When the oil supply port, the outlet cover and the parts form an oil inlet passage, the parts are flushed; After the flushing operation is completed, the flushing machine stops supplying oil, and the elastic reset mechanism automatically rebounds, driving the piston to return to its initial position, so that the oil drain port is connected with the valve body cavity, and the oil from the oil drain port is discharged to the outside through the valve body cavity.

[0015] Furthermore, the oil supply pressure of the flushing machine is 0.8 to 1 MPa.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a valve for flushing parts, which comprises a valve body and an inlet end cover and an outlet end cover at both ends of the valve body, a piston is inserted in the valve body, and an elastic reset mechanism is sleeved on the piston; the piston can compress the elastic reset mechanism in the oil supply state, and the oil supply port of the piston, the outlet end cover and the part form an oil inlet passage, and the oil discharge port of the outlet end cover is blocked; when the oil supply is finished, the elastic reset mechanism drives the piston to reset to the initial position through rebound, so that the oil discharge port is connected with the valve body cavity to discharge the oil to the outside; the use of the valve does not need to design and equip a special flushing tool and a flushing box for each part, and can meet the flushing requirements of parts with different specifications or structures with the adjustable piston and outlet end cover; thereby significantly reducing the flushing workload and improving the flushing efficiency; the valve uses the oil supply passage and the elastic reset mechanism inside the piston to control the circulation of the flushing medium, and does not need to rely on compressed air to drive the expansion and contraction of the valve, which not only simplifies the complexity of the equipment, but also avoids the problem of affecting the continuity and efficiency of the flushing process due to unstable compressed air supply, thereby ensuring the stability of the flushing process and the consistency of the flushing effect.

[0017] Preferably, in the present invention, the opening directions of the oil supply port and the oil discharge port are arranged vertically, which effectively prevents oil from leaking out of the oil discharge port when the piston oil supply and the oil discharge port meet during the movement of the piston, thereby ensuring stable and reliable operation of the oil flushing operation.

[0018] Preferably, in the present invention, the step structure design of the inner cavity of the outlet end cover enables 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, and the piston is arranged close to the inner wall of the first cavity, which is equivalent to blocking the oil supply port before entering the second cavity, thereby overcoming the problem of premature leakage of oil from the oil supply port and ensuring reliable operation of the flushing operation.

[0019] Preferably, in the present invention, a spring is used as the elastic reset mechanism, which has a simple structure, low cost, good resilience and durability, and ensures stable movement of the piston in the oil supply and oil supply end states.

[0020] Preferably, in the present 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 prolongs the service life of the valve.

[0021] Preferably, in the present 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 time, thereby ensuring stable operation of the flushing operation of other holes to be flushed of the shell parts.

[0022] Preferably, in the present invention, the valve body, the inlet end cover, the piston and the outlet end cover are arranged coaxially, thereby ensuring unobstructed flow of the internal flow channel of the valve and improving the flow efficiency and flushing effect of the flushing medium.

[0023] The present invention also provides a flushing system, including the above-mentioned parts flushing valve. The system also includes multiple parts flushing valves and a flushing machine connected to the parts flushing valves. The number of parts flushing valves corresponds one to one with the holes to be flushed in the parts. The flushing system can be used for flushing operations of aviation shell parts of different specifications and sizes, solving the problem of poor versatility of traditional flushing equipment; and only the impact machine and the valve need to cooperate to realize the flushing operations of different holes to be flushed, which reduces the complexity of flushing and greatly improves the parts flushing efficiency and flushing effect.

[0024] The present invention also provides a flushing method. Based on the above-mentioned parts flushing valve, the method accurately controls the oil supply and oil stop time of the flushing machine, as well as the movement position of the piston, thereby achieving accurate flushing of the parts and improving the flushing quality and efficiency.

[0025] Preferably, in the present invention, the oil supply pressure range of the flushing machine is specified (0.8 ~ 1 MPa), ensuring that the oil enters the valve body through the inlet end cover, 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 cover, the balance of the oil supply state is guaranteed, thereby achieving reliable and stable oil supply to the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a conventional parts washing system provided by an embodiment of the present invention; Figure 2 A schematic diagram of oil supply for a conventional parts flushing system provided by an embodiment of the present invention; Figure 3 A schematic diagram of stopping oil supply for a conventional parts flushing system provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a parts flushing valve provided by an embodiment of the present invention; Figure 5 A schematic diagram of a valve body structure of a parts flushing valve provided in an embodiment of the present invention, wherein (a) is a front view; (b) is a side sectional view; Figure 6 A schematic diagram of a piston structure of a parts flushing valve provided in an embodiment of the present invention, wherein (a) is a front view; (b) is a side sectional view; Figure 7 A schematic diagram of the inlet end cover structure of a parts flushing valve provided in an embodiment of the present invention; wherein (a) is a front view; (b) is a side sectional view; Figure 8 A schematic diagram of the structure of an outlet end cover of a parts flushing valve provided in an embodiment of the present invention; wherein (a) is a front view; (b) is a side sectional view; Fig. 9 A schematic diagram of oil supply for a parts flushing valve provided in an embodiment of the present invention; Fig.10 A schematic diagram of oil discharge of a valve for parts flushing provided in an embodiment of the present invention.

[0027] Reference numerals: 1. Inlet cover, 2. Valve body, 3. Piston, 4. Spring, 5. Outlet cover, 6. Oil supply port, 7. Oil discharge port; 101. Rinse the box, 102. Rinse the tooling, 103. Parts. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] 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, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1 Combined with the background technology mentioned above, currently, the flushing measures mainly adopt: design a set of special flushing tools according to the flushing scheme, such as Figure 1 As shown, the part 103 is placed in a special flushing tool 102, and then placed in a flushing box 101; the flushing program controls the expansion and contraction of the valve core of the flushing box 101 by controlling the airflow, so as to flush the part 103 according to the flushing scheme. In this scheme, compressed air is required to drive the expansion and contraction of the valve, such as Figure 2 As shown, air is introduced into the air inlet 1, the air inlet 2 is open, the valve core is extended and pressed against the shell, and oil is introduced into the oil inlet at the same time, so that the flushing machine can supply oil to flush the shell; Figure 3 As shown, the oil inlet stops supplying oil, the air inlet 1 is opened, the air inlet 2 is intaken, the valve core is retracted, and at the same time, the hole on the shell is available for other inlets to discharge oil; it can be seen that the existing flushing measures have certain limitations, which are specifically reflected in: First, for each part with different specifications or structures, a set of special flushing tools and corresponding flushing boxes must be designed and equipped, which increases the flushing workload and reduces the flushing efficiency; second, the flushing box needs to rely on compressed air to drive the extension and retraction of the valve during operation to achieve the flow control of the flushing medium. This dependence not only increases the complexity of the equipment, but may also affect the continuity and efficiency of the flushing process due to the instability of the compressed air supply, which is easy to affect the flushing effect.

[0036] In order to solve the above problems, the present invention provides a valve for flushing parts. With the valve, the valve and the parts are directly connected; the valve is controlled by the oil supply pressure. When the flushing machine supplies oil, the valve supplies oil to the shell; when the flushing machine stops supplying oil, the valve can discharge oil from other oil inlets on the shell. Based on the valve, a new flushing method for complex shells is formed.

[0037] like Figure 1 As shown, this embodiment provides a valve for parts flushing, the core component of the valve is the valve body 2, as shown in FIG. Figure 5 As shown, specifically Figure 5 (a) and Figure 5 As shown in (b), the valve body 2 is used to connect and support other components. Figure 7 and Figure 8 As shown, specifically Figure 7 As shown in Figures 7 (a), 7 (b) and 8 (a), 8 (b), one end of the valve body 2 is connected to the flushing machine through the inlet end cover 1, ensuring the input of the flushing liquid (oil); the other end is connected to the part 103 to be flushed through the outlet end cover 5, realizing the effective transfer of the flushing liquid.

[0038] like Figure 6 As shown, specifically Figure 6 (a) Figure 6As shown in (b), a piston 3 is inserted into the internal cavity of the valve body. One end of the piston 3 is adjacent to the inlet end cover 1, and the other end extends into the outlet end cover 5.

[0039] 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 cover 1, and the other end is provided with an oil supply port 6 in a vertical opening direction for controlling the outflow of the flushing liquid.

[0040] Combination Figure 8 As shown, an oil drain port 7 is provided on the outlet end cover 5. The design of the oil drain port 7 ensures that the oil in the cavity of the valve body 2 can be drained smoothly after flushing.

[0041] In this embodiment, when in the initial state or after the oil supply is finished, the oil discharge port 7 is always in communication with the cavity of the valve body 2 .

[0042] In order to ensure that the piston 3 can be reset to the initial state after flushing, the piston 3 is equipped with an elastic reset mechanism in this embodiment.

[0043] During flushing, the piston 3 will compress the elastic reset mechanism, so that a smooth oil inlet path is formed between the oil supply port 6, the outlet cover 5 and the part 103, and the oil discharge port 7 is blocked by the piston 3 body. When flushing is completed, the elastic reset mechanism will use its own elastic force to push the piston back to the initial position, ready for the next flushing.

[0044] In this embodiment, the elastic reset mechanism adopts a spring 4; in order to extend the service life of the valve 2, the elastic reset mechanism preferably adopts SUS304 stainless steel, SUS316 stainless steel and SUS631 stainless steel, so that it has good corrosion resistance and high temperature resistance.

[0045] In this embodiment, the opening directions of the oil supply port 6 and the oil discharge port 7 are perpendicular to each other and are arranged at 90° to avoid liquid leakage during the flushing process; the inner cavity of the outlet end cover 5 adopts a step structure design, which optimizes the movement trajectory of the piston and ensures that the flushing liquid can be accurately delivered to the parts.

[0046] In this embodiment, at least one oil drain hole is provided around the valve body, which further ensures smooth discharge of the oil after flushing.

[0047] In this embodiment, the valve body 2, the inlet end cover 1, the piston 3 and the outlet end cover 5 are arranged coaxially to ensure the overall stability and flushing effect of the valve.

[0048] This embodiment provides a method for using a parts flushing valve, which is as follows: When the flushing machine does not supply oil, the spring 4 force causes the piston 3 to stop at the far right side. The piston 3 is on the right side of the outlet end cover 5, and the valve body 2 is provided with an oil drain hole that communicates with the outside world. When the flushing machine supplies oil, the oil enters the valve body 2 through the inlet end cover 1, and the oil pressure overcomes the spring 4 force to push the piston 3 to move to the left. When the piston rod of the piston 3 enters the left side of the outlet end cover 5, the oil supply to the part 103 is realized (the oil supply port 6 on the piston rod and the hole on the outlet end cover 5 are distributed at 90 degrees); when the flushing machine stops supplying oil, the spring 4 force causes the piston 3 to move to the right, and 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 communicates with the outside world through the oil drain hole, so that the oil flows out.

[0049] like Fig. 9 As shown, when the flushing machine is supplied with oil, the oil enters the valve body 2 through the inlet end cover 1, and the oil pressure overcomes the elastic force to push the piston 3 to move leftward. When the piston rod enters the left side of the outlet end cover 5, the oil supply to the part 103 is realized. like Fig.10 As shown, when the flushing machine is not supplied with oil, the elastic force of spring 4 fixes piston 3 at the rightmost end, and the piston rod outlet is closed in outlet end cover 5; at the same time, the inner cavity of part 103 is connected to the outside through the oil drain hole on outlet end cover 5 and valve body 2, so that the oil leaks out.

[0050] The present embodiment provides a valve for flushing parts. The flushing of parts is achieved by using this valve. The valve can be applied to aviation shell parts of various specifications and sizes, eliminating the dependence on special tooling and greatly improving the versatility. At the same time, traditional flushing measures use gas for active control, and the use of this gate valve can achieve automatic oil drainage through structural optimization, thereby improving efficiency and reducing costs.

[0051] Example 2 This embodiment also provides a flushing system, which includes a plurality of parts flushing valves provided in Embodiment 1 and a flushing machine connected to each parts flushing valve, wherein the flushing machine is connected to each parts flushing valve via an oil supply pipeline.

[0052] This embodiment also provides a working method based on the above flushing system, and the specific steps are as follows: First, connect the flushing machine to the flushing valves of each part; The flushing machine starts to supply oil, and the oil enters the oil supply passage of the piston 3 through the inlet end cover 1, pushing the piston 3 to move toward the outlet end cover 5, and the piston 3 compresses the elastic reset mechanism; When the oil supply port 6, the outlet end cover 5 and the part 103 form an oil inlet passage, the flushing operation of the part 103 begins; After the flushing operation is completed, the flushing 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 drain port 7 is connected with the cavity of the valve body 2, and the oil from the oil drain port 7 is discharged to the outside through the cavity of the valve body 2.

[0053] In this embodiment, the oil supply pressure of the flushing machine is 0.8 to 1 MPa, so that the oil is ensured to enter the valve body through the inlet end cover. 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 cover, the balance of the oil supply state is guaranteed, thereby achieving reliable and stable oil supply to the parts.

[0054] In summary, the present invention provides a valve, a flushing system and a flushing method for parts flushing, which have the following advantages compared with existing flushing measures: First, the present invention provides a valve for flushing parts with a compact structure and comprehensive functions. Through the movement of the piston in the valve body and the cooperation of the elastic reset mechanism, the flushing medium is precisely controlled, ensuring the stability and efficiency of the flushing process; at the same time, the coaxiality setting of the valve body ensures the precise cooperation between the various components, further improving the flushing effect. Secondly, the oil supply port and the oil discharge port in the valve are arranged vertically, avoiding liquid leakage during the flushing process and improving the sealing performance of the valve. The step structure design of the outlet end cover optimizes the movement trajectory of the piston and improves the flushing effect. The elastic reset mechanism in the present invention adopts a spring and uses corrosion-resistant and high-strength stainless steel materials to ensure the durability and reliability of the valve. One end of the spring abuts against the end face of the piston, and the other end also abuts against the end face of the piston, and the precise control of the piston is achieved through compression and rebound; furthermore, the oil discharge hole opened on the valve body allows the residual oil to be discharged smoothly after the flushing is completed, ensuring the stable operation of the flushing operation of other flushing holes of 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 work of multiple valves, synchronous flushing of parts is achieved, which greatly improves the flushing efficiency and the flushing effect.

[0055] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A valve for parts flushing, characterized in that: comprising a valve body (2); One end of the valve body (2) is provided with an inlet end cover (1) for connecting to a flushing machine, and the other end is provided with an outlet end cover (5) for connecting to a component (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); An oil supply passage is provided inside the piston (3), one end of the oil supply passage is connected to the inlet of the inlet end cover (1), and the other end of the oil supply passage is provided with an oil supply port (6); The outlet end cover (5) is provided with an oil discharge port (7). When the oil supply is stopped, the oil discharge port (7) is always connected to the cavity of the valve body (2) and can discharge the oil from the oil discharge port (7) to the outside through the cavity of the valve body (2); An elastic reset mechanism is sleeved on the piston (3). The piston (3) can compress the elastic reset mechanism in the oil supply state, so that the oil supply port (6), the outlet end cover (5) and the component (103) form an oil inlet passage, and the oil discharge port (7) is blocked; when the oil supply ends, the elastic reset mechanism drives the piston (3) to reset to an initial position by rebounding.

2. The parts flushing valve according to claim 1, characterized in that: The opening directions of the oil supply port (6) and the oil discharge port (7) are arranged in a perpendicular direction.

3. The parts flushing valve according to claim 1, characterized in that: The inner cavity of the outlet end cover (5) is arranged in a step structure along the oil supply direction, comprising a first cavity and a second cavity that are connected, and 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 discharge port (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 parts flushing valve according to claim 1, characterized in that: The elastic return mechanism adopts a spring (4), one end of the spring (4) abuts against the end surface of the piston (3), and the other end of the spring (4) abuts against the end surface of the piston (3).

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

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

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

8. A flushing system, characterized in that: It comprises a plurality of parts flushing valves and flushing machines as described in claims 1-7; the number of the parts flushing valves corresponds one-to-one to the flushing holes of the parts (103); the flushing machine is connected to each of the parts flushing valves via an oil supply pipeline.

9. A flushing method, characterized in that: The parts flushing valve according to claims 1 to 7 comprises: The flushing machine starts to supply oil, and the oil enters the oil supply passage of the piston (3) through the inlet end cover (1), pushing the piston (3) to move toward the outlet end cover (5), and the piston (3) compresses the elastic reset mechanism; When the oil supply port (6), the outlet end cover (5) and the component (103) form an oil inlet passage, the component (103) is flushed; After the flushing operation is completed, the flushing 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 discharge port (7) is connected to the cavity of the valve body (2), and the oil from the oil discharge port (7) is discharged to the outside through the cavity of the valve body (2).

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

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