Automatic supply catheter, catheter assembly, its working method and airtightness testing method

Abstract

This invention pertains to the field of internal oil circuit flushing for shell-type parts, specifically relating to an automatic supply conduit, conduit assembly, its operating method, and an airtightness testing method. It includes a cylindrical body with a first air inlet connector, a flushing connector, and a second air inlet connector communicating with the inner cavity of the body. A supply conduit passes through the body, and an oil passage hole is formed within the supply conduit, communicating with the flushing connector. A first cavity and a second cavity are formed between the cylindrical body and the supply conduit, located at opposite ends of the cylindrical body. The first cavity communicates with the first air inlet connector, and the second cavity communicates with the second air inlet connector. A universal pressure head is movably connected to the supply conduit. This invention replaces the traditional manual disassembly and installation process with an automatic supply of cleaning fluid, reducing worker labor intensity while effectively preventing secondary contamination of the shell, lowering flushing costs, improving flushing efficiency, reducing the harm to human health from the working environment, and enhancing the level of shell component flushing technology.

Description

Technical Field

[0001] This invention belongs to the field of internal oil circuit flushing of shell-type parts, and relates to an automatic supply conduit, conduit assembly and its working method and airtightness detection method. Background Technology

[0002] The cleanliness of fuel accessories in aviation products directly affects the quality of aircraft engines, and the industry has always had stringent requirements for the cleanliness control of housing components. The internal structure of the housing is complex, with multiple crisscrossing channels and pores. Current cleanliness control methods mainly rely on high-flow-rate alternating oil and gas flushing, combined with relevant enterprise standards, regulations, and process specifications. The flushing process of the complex oil passages inside the housing must be carried out according to a process route of subsystems, steps, and multiple cycles.

[0003] The traditional flushing process involves fixing the housing components onto a dedicated flushing device and placing them together in a test bench. The test bench contains multiple flushing hoses. Following the flushing procedure specifications, workers use connecting short pipes, adapter assemblies, pipe fittings, and grounding wires to connect and secure the flushing hoses on the test bench to all the oil passage openings in the first step of the process on the housing. The remaining flushing hoses are then plugged with special end caps, and the flushing program is started for cyclic flushing. The flushing hoses, programmed according to the test bench's built-in PLC, alternately spray oil and gas into the housing to flush out contaminants. After successful flushing, the program is paused, the flushing hoses stop spraying, and the worker removes the device and end caps from the first step, replacing them with a flushing device corresponding to the second step's opening system. All oil passage openings in the second step are then secured, and the remaining flushing hoses are plugged. The program is started again for cyclic flushing, and the device is removed after successful flushing. This process is repeated until all flushing steps in the procedure are completed, meaning all openings in the housing components are thoroughly flushed. Except for the last step, the rinsing cycle in each step is 3-5 minutes, and multiple cycles can be performed depending on the rinsing effect. The rinsing cycle in the final step is 90-120 minutes, and a maximum of two cycles can be performed. If the cleanliness is still unsatisfactory after two cycles, the process returns to the first step for rerinsing. The rinsing device should be broadly understood as all specialized tooling used in the rinsing process to connect, transfer, and fix the rinsing hoses within the test bench to the housing to be rinsed, including box-type rinsing devices, plate-type rinsing devices, oil inlet adapters, hose transfer assemblies, hose plugs, and pipe fittings. The housing mentioned in this text can refer to housing parts or housing assembly products composed of multiple housing parts. The rinsing environment is a flammable and explosive environment. During the installation and disassembly of each step, it is necessary to repeatedly confirm that the wires are properly grounded to prevent static electricity from causing a fire during the rinsing process. In addition, the holes to be rinsed in each step are sometimes a single hole system, and sometimes multiple hole systems located on different end faces. To facilitate the explanation of existing technology, the most commonly used box-type and plate-type flushing devices are used as examples to further illustrate the above content with pictures. This can be combined with... Figure 1a and Figure 1b Let's understand the above together. Figure 1a This is a schematic diagram of the use of a box-type flushing device. Figure 1b This is a schematic diagram of the use of a plate-type flushing device.

[0004] As the company develops and the workload of scientific research and production continues to increase, the drawbacks of the existing rinsing process are gradually becoming apparent, specifically:

[0005] 1. The rinsing process requires repeated manual disassembly, installation, and adjustment of the rinsing device, which is labor-intensive.

[0006] 2. Repeated disassembly and reassembly processes can easily introduce new pollutants, causing secondary pollution and resulting in unsatisfactory cleanliness control.

[0007] 3. The oil passage holes in the shell have different shapes and sizes, including straight holes perpendicular to the outer surface, oblique holes not perpendicular to the outer surface, non-standard threaded holes, and irregular holes. This means that the flushing process requires the design and manufacture of multiple devices that are compatible with the shell. In addition, the devices need to be rinsed and cleaned separately with cleaning solution before use, which results in high production costs and a large waste of cleaning solution.

[0008] 4. Repeatedly starting and pausing the rinsing process causes the various steps in the rinsing process to be discontinuous, resulting in long rinsing time and low efficiency.

[0009] 5. The oil used in the rinsing process is aviation kerosene at 50℃-60℃ or No. 3 jet fuel at 60℃-80℃, which is highly volatile. During manual operation, the operator will inhale a large amount of volatile gas, which is harmful to human health. Summary of the Invention

[0010] In order to overcome the shortcomings of the prior art, the present invention aims to provide an automatic supply conduit, conduit assembly and its working method and airtightness detection method. The present invention can automatically deliver cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with automatic supply, reducing the labor intensity of workers, effectively avoiding secondary pollution of the housing, reducing flushing costs, improving flushing efficiency, reducing the harm of the working environment to human health, and improving the flushing technology level of housing components.

[0011] To achieve the above objectives, the present invention employs the following technical solution:

[0012] In a first aspect, the present invention discloses an automatic supply conduit, comprising a cylindrical body, wherein a first air inlet connector, a flushing connector, and a second air inlet connector are provided on the cylindrical body and communicate with the inner cavity of the cylindrical body; a supply conduit is provided inside the cylindrical body and an oil passage hole is provided inside the supply conduit, the oil passage hole being able to communicate with the flushing connector; a first cavity and a second cavity are formed between the cylindrical body and the supply conduit, the first cavity and the second cavity being located at opposite ends of the cylindrical body; the first cavity is communicated with the first air inlet connector and the second cavity is communicated with the second air inlet connector; and a universal pressure head is movably connected to the supply conduit.

[0013] Secondly, this invention discloses an automatic supply catheter operating method, comprising the following steps:

[0014] When the first air inlet is open and the second air inlet is closed, the gas enters the first cavity and pushes the supply conduit to slide forward in the cylinder. The flushing connector is connected to the oil passage hole, and the cleaning fluid is sprayed out through the flushing connector, the oil passage hole and the universal pressure head in sequence.

[0015] When the first air inlet is shut off and the second air inlet is opened, the gas enters the second cavity and pushes the supply conduit to slide in the opposite direction inside the cylinder, thus disconnecting the flushing connector from the oil passage.

[0016] Thirdly, the present invention discloses an automatic supply catheter assembly, which is composed of a plurality of automatic supply catheters.

[0017] Fourthly, the present invention discloses a method for operating an automatic supply catheter assembly, comprising the following steps:

[0018] The automatic supply conduit is connected to the corresponding oil passage hole, and the oil passage hole cleaning operation of the shell is performed according to the process. During the oil passage hole cleaning operation, the automatic supply conduit is always connected to the corresponding oil passage hole until the oil passage hole cleaning operation of the shell is completed.

[0019] Fifthly, this invention discloses a method for detecting the airtightness of an automatic supply catheter, comprising the following steps:

[0020] Block the supply tube, connect the flushing connector with an air tube, and place the end of the air tube in water;

[0021] Compressed air is injected into the first air inlet and the second air inlet in sequence, while observing whether bubbles emerge from the water basin. When the first air inlet is inflated, the second air inlet is sealed, and when the second air inlet is inflated, the first air inlet is sealed.

[0022] If no bubbles emerge from the water, it indicates that the oil-gas chamber and the gas chamber are well sealed and there is no leakage. If bubbles emerge, it indicates that the gas in the gas chamber can penetrate into the oil-gas chamber channel, and the sealing performance is unqualified.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The invented automatic supply conduit includes a cylindrical body for assembling a first air inlet connector, a flushing connector, a second air inlet connector, and a supply conduit. The first air inlet connector, in conjunction with the second air inlet connector, enables the supply conduit to slide in both directions within the cylindrical body, thus opening and closing the supply conduit. The supply conduit passes through the cylindrical body and has an oil passage hole that communicates with the flushing connector. When the oil passage hole is connected to the flushing connector, the supply conduit opens to supply cleaning fluid; when the connection is interrupted, the supply conduit closes to supply cleaning fluid. A first cavity and a second cavity are formed between the cylindrical body and the supply conduit, located at opposite ends of the cylindrical body. The first cavity communicates with the first air inlet connector, and the second cavity communicates with the second air inlet connector. When the first air inlet connector is open and the second air inlet connector is closed, gas enters the first cavity and pushes the supply conduit to slide forward within the cylindrical body. When the first air inlet connector is closed and the second air inlet connector is open, gas enters the second cavity and pushes the supply conduit to slide in the reverse direction within the cylindrical body. The supply conduit is movably connected to a universal pressure head, which conforms to the shape of the oil passage openings in the housing to accommodate different housing oil passage openings. This invention's automatic supply conduit can automatically deliver cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automated supply method. This reduces worker labor intensity, effectively avoids secondary contamination of the housing, lowers flushing costs, improves flushing efficiency, reduces the harm to human health from the working environment, and enhances the level of housing component flushing technology.

[0025] The automatic supply conduit operation method of this invention involves the following steps: When the first air inlet is open and the second air inlet is closed, gas enters the first cavity and pushes the supply conduit to slide forward within the cylinder. The flushing connector is connected to the oil passage, and the cleaning fluid is sprayed out sequentially through the flushing connector, the oil passage, and the universal pressure head. When the first air inlet is closed and the second air inlet is open, gas enters the second cavity and pushes the supply conduit to slide in the reverse direction within the cylinder, disconnecting the flushing connector from the oil passage. This method automatically delivers cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automatic supply method. This reduces the labor intensity of workers, effectively avoids secondary contamination of the housing, reduces flushing costs, improves flushing efficiency, reduces the harm of the working environment to human health, and enhances the flushing technology level of housing components.

[0026] This invention relates to an automatic supply conduit assembly, which consists of several automatic supply conduits. It can automatically deliver cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automatic supply method. This reduces the labor intensity of workers, effectively avoids secondary contamination of the housing, reduces rinsing costs, improves rinsing efficiency, reduces the harm of the working environment to human health, and enhances the rinsing technology level of housing components.

[0027] The present invention discloses an automatic supply conduit assembly operating method. The automatic supply conduit is connected to the corresponding oil passage hole, and the cleaning operation of the oil passage hole of the housing is performed according to the procedure. During the oil passage hole cleaning operation, the automatic supply conduit remains connected to the corresponding oil passage hole until the cleaning operation of the oil passage hole of the housing is completed. This invention replaces the traditional manual disassembly and installation process with an automatic supply method, avoiding repeated disassembly, installation, and adjustment of the flushing device during the flushing process. This reduces the labor intensity of workers, effectively avoids secondary contamination of the housing, reduces flushing costs, and improves flushing efficiency.

[0028] This invention discloses a method for testing the airtightness of an automatic supply conduit. First, the supply conduit is sealed, and a flushing connector is connected using an air hose, with the end of the air hose submerged in water. This ensures the airtightness of the internal experimental environment of the device. Compressed air is sequentially supplied to the first and second air inlets. While the first air inlet is being supplied, the second air inlet is sealed, and vice versa. If no bubbles emerge from the water, it indicates a good seal between the oil-gas chamber and the gas chamber with no leakage. If bubbles emerge, it indicates that gas in the gas chamber can permeate into the oil-gas chamber, and the seal is unqualified. This method ensures the airtightness of the device and guarantees its safety during operation. Attached Figure Description

[0029] Figure 1a A schematic diagram illustrating the use of a box-type flushing device;

[0030] Figure 1b Schematic diagram of a plate-type flushing device;

[0031] Figure 2 This is a structural diagram of the automatic supply catheter of the present invention;

[0032] Figure 3a This is a diagram of the plug-in air intake structure of the present invention;

[0033] Figure 3b This is an assembly diagram of the plug-in air intake structure of the present invention;

[0034] Figure 4a This is a cross-sectional view of the cylindrical structure of the present invention;

[0035] Figure 4b for Figure 4a AA section view;

[0036] Figure 5 This is a structural diagram of the supply conduit of the present invention;

[0037] Figure 6 This is a structural diagram of the nozzle and universal pressure head of the present invention;

[0038] Figure 7a This is a diagram of the automatic supply catheter device of the present invention;

[0039] Figure 7b for Figure 7a A magnified view of a portion of the image;

[0040] Figure 8 This is a flowchart of the automatic supply catheter working method of the present invention;

[0041] Figure 9 This is a flowchart of the automatic supply catheter airtightness detection method of the present invention.

[0042] The components are as follows: 1. Compression pin; 2. First air inlet connector; 2-1. O-ring seal; 3. Plug; 4. Cylinder; 5. Stop pin; 6. Bushing; 7. Supply conduit; 7-1. First pipe body; 7-2. Second pipe body; 7-3. Third pipe body; 8. Nozzle; 9. Universal pressure head; 10. Flushing connector; 11. Second air inlet connector; 12. Oil runner; 13. Labyrinth seal structure; 14. First cavity; 15. Second cavity; 16. Oil passage hole; 17. Rectangular opening; 18. Supply conduit mounting hole; 19. Through hole; 20. Crescent-shaped chamber; 21. Automatic supply conduit; 22. Housing; 23. Flushing hose; 24. Pipe connector; 25. Adapter. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] See Figure 2This invention discloses an automatic supply conduit, including a cylindrical body 4. The cylindrical body 4 is used to assemble a first air inlet connector 2, a flushing connector 10, a second air inlet connector 11, and a supply conduit 7. The cylindrical body 4 is provided with the first air inlet connector 2, the flushing connector 10, and the second air inlet connector 11 communicating with the inner cavity of the cylindrical body 4. The first air inlet connector 2, in conjunction with the second air inlet connector 11, enables the supply conduit 7 to slide in both directions within the cylindrical body 4, thereby opening and closing the supply conduit. The supply conduit 7 passes through the cylindrical body 4, and an oil passage hole 16 is formed within the supply conduit 7. The oil passage hole 16 can communicate with the flushing connector 10. When the oil passage hole 16 is connected to the flushing connector 10, the supply conduit opens to supply cleaning fluid; when the connection between the oil passage hole 16 and the flushing connector 10 is interrupted, the supply conduit closes to supply cleaning fluid. A first cavity 14 and a second cavity 15 are formed between the cylinder 4 and the supply conduit 7. The first cavity 14 and the second cavity 15 are located at opposite ends of the cylinder 4. The first cavity 14 is connected to the first air inlet connector 2, and the second cavity 15 is connected to the second air inlet connector 11. When the first air inlet connector 2 is open and the second air inlet connector 11 is closed, gas enters the first cavity 14 and pushes the supply conduit 7 to slide forward within the cylinder 4, compressing the second cavity 15. When the first air inlet connector 2 is closed and the second air inlet connector 11 is open, gas enters the second cavity 15 and pushes the supply conduit 7 to slide backward within the cylinder 4, compressing the first cavity 14. The supply conduit 7 is movably connected to a universal pressure head 9, which can conform to the shape of the oil passage opening in the housing to adapt to different housing oil passage openings. The automatic supply conduit of this invention can automatically deliver cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automatic supply method. This reduces the labor intensity of workers, effectively avoids secondary pollution of the housing, reduces rinsing costs, improves rinsing efficiency, reduces the harm of the working environment to human health, and improves the rinsing technology level of housing components.

[0047] See Figure 2 In another feasible embodiment of the present invention, the following modifications are made as appropriate. The system includes a cylindrical body 4, on which a first air inlet connector 2, a flushing connector 10, and a second air inlet connector 11 are provided, communicating with the inner cavity of the cylindrical body 4. A supply conduit 7 passes through the cylindrical body 4, and an oil passage hole 16 is opened within the supply conduit 7, which can communicate with the flushing connector 10. A first cavity 14 and a second cavity 15 are formed between the cylindrical body 4 and the supply conduit 7, respectively located at both ends of the cylindrical body 4. The first cavity 14 communicates with the first air inlet connector 2, and the second cavity 15 communicates with the second air inlet connector 11. The supply conduit 7 is movably connected to a universal pressure head 9.

[0048] The cylinder 4 is used to assemble the first air inlet connector 2, the flushing connector 10, the second air inlet connector 11, and the supply conduit 7. The first air inlet connector 2, in conjunction with the second air inlet connector 11, enables the supply conduit 7 to slide in both directions within the cylinder 4, thereby opening and closing the supply conduit. The universal pressure head 9 can conform to the shape of the oil passage opening in the housing to accommodate different housing oil passage openings.

[0049] In operation, when the first air inlet connector 2 is vented and the second air inlet connector 11 is de-vented, gas enters the first cavity 14 and pushes the supply conduit 7 to slide forward within the cylinder 4, causing the universal pressure head 9 to conform to the oil passage opening of the housing. The second cavity 15 is compressed, and the oil passage opening 16 connects to the flushing connector 10, thus opening the supply conduit to supply cleaning fluid. When cleaning needs to be interrupted, the first air inlet connector 2 is de-vented, and the second air inlet connector 11 is vented. Gas enters the second cavity 15 and pushes the supply conduit 7 to slide in the reverse direction within the cylinder 4. The first cavity 14 is compressed, the connection between the oil passage opening 16 and the flushing connector 10 is interrupted, and the supply conduit stops supplying cleaning fluid. This invention's automatic supply conduit can automatically deliver cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automatic supply method. This reduces the labor intensity of workers, effectively avoids secondary contamination of the housing, reduces flushing costs, improves flushing efficiency, reduces the harm of the working environment to human health, and enhances the level of housing component flushing technology.

[0050] Example 1:

[0051] See Figure 2 This embodiment discloses an automatic supply conduit, including a cylinder 4. The cylinder 4 is provided with a first air inlet connector 2, a flushing connector 10 and a second air inlet connector 11 that communicate with the inner cavity of the cylinder 4. A supply conduit 7 is inserted inside the cylinder 4. An oil passage hole 16 is opened in the supply conduit 7 and can communicate with the flushing connector 10. A first cavity 14 and a second cavity 15 are formed between the cylinder 4 and the supply conduit 7. The first cavity 14 and the second cavity 15 are respectively located at both ends of the cylinder 4. The first cavity 14 communicates with the first air inlet connector 2 and the second cavity 15 communicates with the second air inlet connector 11. The supply conduit 7 is movably connected to a universal pressure head 9.

[0052] A bushing 6 is arranged between the cylinder 4 and the supply conduit 7. The bushing 6 has a rectangular opening 17 and a through hole 19. The rectangular opening 17 is used to connect the flushing connector 10 and the oil passage hole 16, and the through hole 19 is used to connect the second cavity 15 and the second air inlet connector 11.

[0053] Preferably, the rectangular opening 17 on the bushing 6 is a rectangular opening.

[0054] Several sealing rings are provided between the supply conduit 7 and the bushing 6, and several sealing rings are provided between the cylinder 4 and the bushing 6.

[0055] The cylinder 4 includes a plug 3, and there is a first cavity 14 between the plug 3 and the supply conduit 7. The plug 3 is provided with a first air inlet connector 2.

[0056] The first air inlet connector 2 is fixedly mounted on the plug 3 by the clamping pin 1. Both the first air inlet connector 2 and the clamping pin 1 have a communicating air inlet hole, which is connected to the first cavity 14.

[0057] Example 2:

[0058] See Figure 2 This embodiment discloses an automatic supply conduit, including a cylinder 4. The cylinder 4 is provided with a first air inlet connector 2, a flushing connector 10 and a second air inlet connector 11 that communicate with the inner cavity of the cylinder 4. A supply conduit 7 is inserted inside the cylinder 4. An oil passage hole 16 is opened in the supply conduit 7 and can communicate with the flushing connector 10. A first cavity 14 and a second cavity 15 are formed between the cylinder 4 and the supply conduit 7. The first cavity 14 and the second cavity 15 are respectively located at both ends of the cylinder 4. The first cavity 14 communicates with the first air inlet connector 2 and the second cavity 15 communicates with the second air inlet connector 11. The supply conduit 7 is movably connected to a universal pressure head 9.

[0059] See Figure 4a and Figure 4b The cylinder 4 has a supply conduit mounting hole 18, see [reference]. Figure 5 The supply conduit 7 includes a first tube 7-1, a second tube 7-2, and a third tube 7-3. The third tube 7-3 passes through the supply conduit mounting hole 18 and extends out of the cylinder 4. The first tube 7-1 and the second tube 7-2 are located in the cavity of the cylinder 4. The diameter of the first tube 7-1 is larger than the diameter of the second tube 7-2, and the diameter of the second tube 7-2 is larger than the diameter of the third tube 7-3. A second cavity 15 is formed between the second tube 7-2 and the cylinder 4.

[0060] The first pipe body 7-1 has an oil running groove 12, which connects the oil passage hole 16 and the rectangular opening 17. The cylinder body 4 has a crescent-shaped chamber 20, which connects the flushing connector 10 and the rectangular opening 17.

[0061] See Figure 2 and Figure 6 The third tube 7-3 is connected to the nozzle 8, and the nozzle 8 is movably connected to the universal pressure head 9. The third tube 7-3, the nozzle 8 and the universal pressure head 9 are all connected. The nozzle 8 has a concave spherical surface, and the universal pressure head 9 has a convex spherical surface. The convex spherical surface is embedded in the concave spherical surface.

[0062] Example 3:

[0063] See Figure 2This embodiment discloses an automatic supply conduit, including a cylinder 4 and a supply conduit 7. The left end of the cylinder 4 is open and connected to a plug 3, which seals the inner cavity of the cylinder 4. A supply conduit mounting hole 18 is provided on the right end face of the cylinder. An annular groove is provided in the radial direction within the supply conduit mounting hole 18. A 45° parting surface O-ring is provided in the annular groove. The O-ring contacts the outer wall of the supply conduit 7. The supply conduit 7 passes through the supply conduit mounting hole 18 at the right end of the cylinder 4 to seal the inner cavity of the cylinder 4. One end of the supply conduit 7 is located in the inner cavity of the cylinder, and the other end extends outward. The nozzle 8 and universal pressure head 9 are connected to the outside of the cylinder. A bushing 6 is provided inside the cylinder. The outside of the bushing 6 contacts the inner cavity of the cylinder, and the inner wall of the bushing 6 contacts the outside of the supply conduit 7. A flange is provided on the right end face of the outer side of the cylinder for installing this device. A flushing connector 10 and a second air inlet connector 11 communicating with the inner cavity are provided on the outside of the cylinder. The nozzle 8 is provided with a concave spherical surface and the size matches the convex spherical surface of the universal pressure head 9. The opening of the concave spherical surface structure of the nozzle is narrowed inward and connected to the universal pressure head in a wrapping manner. A first air inlet connector 2 that can communicate with the inner cavity of the cylinder is provided on the plug 3.

[0064] The plug is equipped with an air intake structure that can communicate with the inner cavity of the cylinder, including a clamping pin 1 and a first air intake connector 2; both the clamping pin and the first air intake connector 2 have a stepped circular structure, see [reference]. Figure 3a and Figure 3b Each of the components has vertically intersecting air passage holes inside; the radial air passage hole inside the clamping pin is a through hole that can communicate with the air passage of the first air inlet connector 2; the axial air passage hole of the clamping pin is connected to the radial air passage in the axial direction; the upper end of the first air inlet connector 2 is shaped like a flat spherical surface; the first air inlet connector 2 has a stepped through hole inside.

[0065] The outer circle of the first step of the clamping pin is provided with a threaded structure that can be connected to the plug. The outer circle of the second step passes through the stepped through hole of the first air inlet connector 2 and is limited to the right end face of the outer circle of the third step. The clearance between the outer circle of the second step of the clamping pin 1 and the minimum diameter of the stepped through hole of the first air inlet connector 2 is not greater than 0.005mm.

[0066] When the clamping pin is screwed into the plug, the first air inlet connector 2 contacts and clamps the end face of the plug and the right end face of the outer circle of the third step of the clamping pin.

[0067] The first air inlet connector 2 has an O-ring inside the stepped through hole; when the clamping pin passes through the first air inlet connector 2 and is screwed into the plug, the O-ring contacts the outer circle of the second step of the clamping pin and is deformed by the end face compression, thus achieving end face sealing and radial sealing of the shaft.

[0068] The lower end of the first air inlet connector 2 has a threaded structure and is connected to the air source hose inside the test bench.

[0069] Both the outer shape and inner cavity of cylinder 4 are non-rotational surfaces, see [reference]. Figure 4a and Figure 4b The inner wall has three sealing grooves and an annular chamber concentric with the sealing grooves. In addition, there is an eccentric crescent-shaped chamber 20 on the inner wall.

[0070] The cylinder 4 is provided with a bushing 6. The bushing has a rectangular opening at the position corresponding to the crescent-shaped chamber, which is a rectangular opening 17. It also has a through hole 19 at the position corresponding to the annular chamber.

[0071] Rectangular sealing rings are provided in three sealing grooves on the inner wall of the cylinder; a V-shaped groove is provided at the left end of the contact surface between the cylinder and the bushing 6, and an O-ring is provided in the V-shaped groove. When the plug is tightened with the cylinder, the O-ring is deformed by the end face of the plug, thus achieving end face sealing.

[0072] The outer shape of the cylinder has a threaded hole that penetrates the cylinder wall, and a stop pin is installed in the threaded hole; the tip of the stop pin is inserted into the bushing to prevent the bushing from rotating in the inner cavity of the cylinder.

[0073] The bushing is interference-fitted with the cylinder and clearance-fitted with the supply conduit. The clearance is no greater than 0.005 mm, the cylindricity of the mating parts is no less than 0.003 mm, and the surface roughness is no less than Ra0.4.

[0074] The supply conduit has a stepped shaft structure, and its outer surface is provided with a labyrinth seal structure 13 and an oil runoff groove 12. See [reference needed]. Figure 5 The supply conduit has axial and radial oil passages inside. The center of the radial oil passage is perpendicular to the axial oil passage, and both ends of the radial oil passage extend in a straight line and connect with the oil running groove. The labyrinth sealing structure 13 on the outer surface of the supply conduit includes 8 sealing grooves. Among them, the 4 sealing grooves near the two sides of the oil running groove are oil trenches, and the 4 sealing grooves away from the two sides of the oil running groove are all provided with 45° parting surface O-ring seals.

[0075] The supply conduit can move axially within the bushing; when the supply conduit moves to the right and stops at the rightmost end of the cylinder, the inner cavity of the cylinder can be connected to the oil run-out groove through the rectangular opening on the bushing; when the supply conduit moves to the left and stops at the end face of the plug, the rectangular opening on the bushing is offset from the oil run-out groove, and the oil passage between the inner cavity of the cylinder and the supply conduit is disconnected.

[0076] The cylindrical surface of the supply conduit extending out of the cylinder is clearance-fitted with the circular opening on the right end face of the cylinder;

[0077] The supply conduit and the nozzle are connected by threads, and the nozzle can be replaced according to the characteristics of the product to be rinsed in order to meet the needs of flexible use of the device.

[0078] The nozzle and universal head must be used in pairs; the length, outer diameter, and spherical surface dimensions of the nozzle should be designed according to usage requirements; the outer diameter and shape of the right end of the universal head can also be adjusted as needed, and its convex spherical structure allows for flexible rotation within the nozzle. (See [link]). Figure 6 The roughness and flatness grade of the right end face of the universal pressure head should not be lower than that of the finished surface of the housing orifice, and the angular degree of freedom of the end face should be ±20°.

[0079] The radial dimension of the concave spherical surface of the nozzle is 0.06-0.10 mm larger than the radial dimension of the convex spherical surface of the universal pressure head;

[0080] The outer diameter of the right end of the universal pressure head must be larger than the maximum profile of the orifice of the flushed hole system.

[0081] The universal pressure head has a through hole that connects to the inner cavity of the nozzle; the through hole is perpendicular to the right end face.

[0082] One end of the flushing connector is threaded to the cylinder body, and the other end is connected to the flushing hose 23 in the test bench; one end of the second air inlet connector 11 is threaded to the cylinder body, and the other end of the second air inlet connector 11 is connected to the air source hose in the test bench; the root of the thread connected to the cylinder body is provided with an annular groove and an O-ring seal to achieve a sealed connection.

[0083] The working principle of the automatic supply conduit device is as follows: When it is necessary to supply cleaning fluid to the shell, the air source at the first air inlet 2 is opened, and the gas enters the inner cavity of the cylinder through the fixed air passage and pushes the supply conduit 7 to move to the right. At the same time as the supply conduit moves to the right, the oil runner and the rectangular opening of the bushing are connected, so that the cleaning fluid can enter the supply conduit 7 and the nozzle 8 through the crescent-shaped chamber of the cylinder and be sprayed out from the middle hole of the universal pressure head. In addition, the universal pressure head also moves with the supply conduit to the right until the right end face of the universal pressure head is attached to and pressed against the surface of the shell. At this time, the small plane around the shell orifice and the end face of the universal pressure head form a surface sealing band, and the spherical structure forms a hard seal, which ensures the pressure when the universal pressure head supplies cleaning fluid into the shell. When it is necessary to stop supplying cleaning fluid to the shell, the air source at the second air inlet 11 is opened and the air source at the first air inlet 2 is closed. The gas enters the second cavity 15 between the bushing and the supply conduit through the annular chamber of the cylinder and the through hole 19 on the bushing, and pushes the supply conduit to the left. At the same time, the oil runner and the rectangular opening of the bushing are completely misaligned, cutting off the path of the cleaning fluid from the crescent-shaped chamber into the supply conduit. In addition, as the supply conduit moves to the left along with the universal pressure head, the end face of the universal pressure head leaves the shell surface, so that the corresponding hole system orifice is open and does not affect the discharge of cleaning fluid during subsequent rinsing.

[0084] Based on the aforementioned automatic supply catheter, this invention also discloses an automatic supply catheter assembly, comprising a plurality of automatic supply catheters. See also Figure 7a and Figure 7bIn the automatic flushing process, multiple automatic supply conduits are required for coordinated use. The number of automatic supply conduits should be designed according to the division of the shell hole system and the specific content of the flushing steps in the flushing process. In most cases, the number of automatic supply conduits is equal to the number of holes after division. Generally speaking, 9 to 11 automatic supply conduits working together can meet the needs of automated flushing of complex shell internal oil circuits. The diameter of the air inlet of the first air inlet connector 2 and the second air inlet connector 11 in the automatic supply conduit should be designed according to the air source pressure to ensure uniform movement of the supply conduit and prevent the universal pressure head from jamming and damaging the shell due to excessively rapid extension of the supply conduit. The diameter of the air inlet of this device is 0.6mm. The automatic supply conduit needs to be installed and fixed on the wall panel of the box-type flushing device or the plate-type flushing device through the flange at its right end. The installation position of the device should be such that the axis of the supply conduit roughly corresponds to the center of the hole of the hole system being flushed. Since the box-type flushing device has better versatility and space structure, this device is usually installed on the wall panel and top plate of the box-type flushing device.

[0085] Based on the above-mentioned automatic supply catheter, the present invention also discloses a method for operating an automatic supply catheter, comprising the following steps:

[0086] S1. When the first air inlet connector 2 is vented and the second air inlet connector 11 is de-vented, the gas enters the first cavity 14 and pushes the supply conduit 7 to slide in the forward direction in the cylinder 4. The flushing connector 10 is connected to the oil passage 16, and the cleaning fluid is sprayed out through the flushing connector 10, the oil passage 16 and the universal pressure head 9 in sequence.

[0087] S2. When the first air inlet connector 2 is cut off and the second air inlet connector 11 is opened, the gas enters the second cavity 15 and pushes the supply conduit 7 to slide in the opposite direction in the cylinder 4, and the flushing connector 10 is disconnected from the oil passage 16.

[0088] See Figure 8 In another feasible embodiment of the present invention, the following modifications are made as needed. The method includes the following steps: when the first air inlet connector 2 is open and the second air inlet connector 11 is closed, gas enters the first cavity 14 and pushes the supply conduit 7 to slide forward within the cylinder 4. The flushing connector 10 is connected to the oil passage 16, and the cleaning fluid is sprayed out sequentially through the flushing connector 10, the oil passage 16, and the universal pressure head 9. When the first air inlet connector 2 is closed and the second air inlet connector 11 is open, gas enters the second cavity 15 and pushes the supply conduit 7 to slide in the reverse direction within the cylinder 4. The flushing connector 10 is disconnected from the oil passage 16. The method of the present invention can automatically deliver the cleaning fluid to the housing as needed, replacing the traditional manual disassembly and installation process with an automatic supply method. This reduces the labor intensity of workers while effectively avoiding secondary pollution of the housing, reducing flushing costs, improving flushing efficiency, reducing the harm of the working environment to human health, and improving the level of housing component flushing technology.

[0089] Based on the above-described automatic supply catheter assembly, the present invention also discloses a method for operating the automatic supply catheter assembly, comprising the following steps:

[0090] The automatic supply conduit 21 is connected to the corresponding oil passage hole, and the cleaning operation of the oil passage hole of the housing 22 is performed according to the procedure. During the oil passage hole cleaning operation, the automatic supply conduit 21 remains connected to the corresponding oil passage hole until the oil passage hole cleaning operation of the housing 22 is completed. This invention replaces the traditional manual disassembly and installation process with an automatic supply method, avoiding repeated disassembly, installation, and debugging of the flushing device during the flushing process. This ensures the continuity between each step in the flushing process, reduces the labor intensity of workers, effectively avoids secondary contamination of the housing, reduces flushing costs, and improves flushing efficiency.

[0091] Example 5:

[0092] See Figure 8 This embodiment discloses an automatic supply catheter working method, including the following steps:

[0093] First, the housing to be rinsed is fixedly installed in the box-type rinsing device according to the process requirements. At this time, the positions of the 9 automatic supply pipes correspond to the positions of the 9 holes in the housing. After connecting the grounding wire, the box door is closed.

[0094] Edit the PLC control program according to the rinsing process, such as rinsing for 5 minutes in the first step, 5 minutes in the second step, 5 minutes in the third step, etc.

[0095] The flushing procedure is initiated. At this time, the first air inlet connector 2 on the corresponding No. 2 automatic supply conduit opens, and the second air inlet connector 11 of the other devices opens. The supply conduit of device No. 2 extends and supplies oil and gas into the inner cavity of the housing. After maintaining this position for 5 minutes, the first air inlet connector 2 on devices No. 7 and No. 8 opens, and simultaneously the second air inlet connector 11 of the other devices opens. The supply conduit of device No. 2 retracts and stops supplying oil and gas, while the corresponding supply conduits of devices No. 7 and No. 8 extend and supply oil and gas into the inner cavity of the housing. The flushing process then proceeds automatically and uninterruptedly from the first step to the second step. The application of this device enables automated flushing of the inner cavity oil circuit subsystem across multiple steps. In addition, when the local outer surface of the housing is too complex or the orifice space is limited, preventing the universal pressure head from directly docking with the housing, a special flushing fixture can be used to dock this device with the housing.

[0096] Based on the above structure, the present invention also discloses an automatic supply catheter airtightness detection method, comprising the following steps:

[0097] S1. Block the supply tube 7, connect the flushing connector 10 with the air tube, and place the end of the air tube in the water;

[0098] S2. Use compressed air to inflate the first air inlet 2 and the second air inlet 11 in sequence, while observing whether there are bubbles coming out of the water basin. When the first air inlet 2 is inflated, the second air inlet 11 is sealed, and when the second air inlet 11 is inflated, the first air inlet 2 is sealed.

[0099] S3. If no bubbles emerge from the water, it indicates that the oil-gas chamber and the gas chamber are well sealed and there is no leakage. If bubbles emerge, it indicates that the gas in the gas chamber can penetrate into the oil-gas chamber channel, and the sealing performance is unqualified.

[0100] See Figure 9 In another feasible embodiment of the present invention, the following modifications are made as needed. The steps include: sealing the supply conduit 7, connecting the flushing connector 10 with an air hose, and placing the end of the air hose in water to ensure the airtightness of the internal experimental environment of the device. Compressed air is sequentially supplied to the first air inlet connector 2 and the second air inlet connector 11. When the first air inlet connector 2 is supplied with air, the second air inlet connector 11 is sealed; when the second air inlet connector 11 is supplied with air, the first air inlet connector 2 is sealed. If no bubbles emerge from the water, it indicates that the oil-gas chamber and the gas chamber are well sealed and leak-free. If bubbles emerge, it indicates that gas in the gas chamber can permeate into the oil-gas chamber, and the seal is unqualified. This method ensures the airtightness of the device and guarantees the safety of the device during operation.

[0101] Example 6:

[0102] See Figure 9 This embodiment discloses a method for detecting an automatic supply catheter, as detailed below:

[0103] To check the sealing of the automatic supply conduit, two quick-connect air hose connectors, an air hose, a threaded plug, a conical sealing hose connector, and a water basin are required. The inspection method is as follows: First, plug the oil outlet of the supply conduit with the threaded plug. Connect the conical sealing hose connector and the air hose to the flushing connector, which is connected to the oil inlet. Place the end of the air hose in the water. Screw the two quick-connect air hose connectors onto the first air inlet connector 2 and the second air inlet connector 11, respectively. Then, inflate the first air inlet connector 2 and the second air inlet connector 11 with compressed air, while observing whether bubbles emerge in the water basin. If no bubbles emerge, it indicates a good seal between the oil / gas passage and the air passage with no leakage. If bubbles emerge, it indicates that gas in the air passage can permeate into the oil / gas passage, and the sealing is unqualified.

[0104] The principle of the automatic supply conduit sealing test method is as follows: Utilizing the physical property that the viscosity of oil is greater than that of gas, and based on the operating principle of the automatic supply conduit device, this method reverses the process by setting the oil inlet as the compressed air outlet, blocking the oil outlet and one of the air inlets, and setting the other air inlet as the compressed air inlet. When compressed air is introduced, the airtightness of the oil-gas passage and the two air chambers can be checked independently, thereby determining whether the automatic supply conduit's sealing performance is up to standard.

[0105] It is important to note that, given the special nature of the rinsing environment—which is flammable and explosive—this invention includes a method for checking the sealing of the automatic supply conduit. The automatic supply conduit contains one oil-gas channel and two gas chambers. These three parts must be independently sealed, and the oil-gas channel and gas chambers must not leak into each other during the operation of the supply conduit to avoid danger. Since one of the two gas chambers is always pressureless during use, while the oil maintains a set pressure and temperature, oil can easily leak into the gas chamber. Furthermore, there are gaps between the bushing of the automatic supply conduit and the inner wall of the cylinder, as well as between the supply conduit itself. Hot oil, under pressure, can leak along the gaps inside and outside the bushing into the lower-pressure gas chamber, making sealing difficult. If there is oil in the gas chamber, when the gas source is turned on, the pressurized gas will instantly blow the oil up, forming an oil mist, posing a safety hazard. Therefore, it is essential to perform a sealing check before using the device.

[0106] The "automatic" in this invention does not refer to the conventional meaning of digital or intelligent automatic control, but rather to a work process that requires no human intervention by outputting a single execution command through a program. The experimental benches and rinsing machines used in this unit are only equipped with PLC control programs. This is a controller that executes commands by outputting signals according to the logical sequence set by the operator. For example, starting automatic supply catheter #1 for 3 minutes, pausing for 5 seconds, starting automatic supply catheters #1 and #3 for 3 minutes, etc. The PLC program is not based on complex algorithms or models, nor does it possess intelligent functions.

[0107] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An automatic supply catheter, characterized in that, Includes a cylinder (4), on which are provided a first air inlet connector (2), a flushing connector (10), and a second air inlet connector (11) communicating with the inner cavity of the cylinder (4). A supply conduit (7) is provided inside the cylinder (4), and an oil passage hole (16) is provided inside the supply conduit (7). The oil passage hole (16) can communicate with the flushing connector (10). A first cavity (14) and a second cavity (15) are formed between the cylinder (4) and the supply conduit (7). The first cavity (14) and the second cavity (15) are located at the two ends of the cylinder (4), respectively. The first cavity (14) is connected to the first air inlet connector (2), and the second cavity (15) is connected to the second air inlet connector (11). The supply conduit (7) is movably connected to a universal pressure head (9). The cylinder (4) is provided with a supply conduit mounting hole (18). The supply conduit (7) includes a first tube (7-1), a second tube (7-2), and a third tube (7-3). The third tube (7-3) passes through the supply conduit mounting hole (18) and extends out of the cylinder (4). The first tube (7-1) and the second tube (7-2) are located in the cavity of the cylinder (4). The diameter of the first tube (7-1) is larger than the diameter of the second tube (7-2). The diameter of the second tube (7-2) is larger than the diameter of the third tube (7-3). A second cavity (15) is formed between the second tube (7-2) and the cylinder (4).

2. The automatic supply catheter as described in claim 1, characterized in that, A bushing (6) is arranged between the cylinder (4) and the supply conduit (7). The bushing (6) has a rectangular opening (17) and a through hole (19). The rectangular opening (17) is used to connect the flushing connector (10) and the oil passage hole (16). The through hole (19) is used to connect the second cavity (15) and the second air inlet connector (11). Several sealing rings are provided between the supply conduit (7) and the bushing (6). Several sealing rings are provided between the cylinder (4) and the bushing (6).

3. The automatic supply catheter as described in claim 2, characterized in that, The cylinder (4) includes a plug (3), and there is a first cavity (14) between the plug (3) and the supply conduit (7). The plug (3) is provided with a first air inlet connector (2), which is fixedly installed on the plug (3) by a clamping pin (1). Both the first air inlet connector (2) and the clamping pin (1) are provided with communicating air inlets, which are connected to the first cavity (14).

4. The automatic supply catheter as described in claim 2, characterized in that, The first pipe body (7-1) is provided with an oil running groove (12), which connects the oil passage hole (16) and the rectangular opening (17). The cylinder body (4) is provided with a crescent-shaped chamber (20), which connects the flushing connector (10) and the rectangular opening (17).

5. The automatic supply catheter as described in claim 1, characterized in that, The third tube (7-3) is connected to the nozzle (8), and the nozzle (8) is movably connected to the universal pressure head (9). The third tube (7-3), the nozzle (8) and the universal pressure head (9) are all connected. The nozzle (8) has a concave spherical surface, and the universal pressure head (9) has a convex spherical surface. The convex spherical surface is embedded in the concave spherical surface.

6. A method for operating an automatic supply catheter as described in any one of claims 1 to 5, characterized in that, Includes the following steps: When the first air inlet connector (2) is open and the second air inlet connector (11) is closed, the gas enters the first cavity (14) and pushes the supply conduit (7) to slide forward in the cylinder (4). The flushing connector (10) is connected to the oil passage (16), and the cleaning fluid is sprayed out through the flushing connector (10), the oil passage (16) and the universal pressure head (9) in sequence. When the first air inlet connector (2) is cut off and the second air inlet connector (11) is opened, the gas enters the second cavity (15) and pushes the supply conduit (7) to slide in the opposite direction inside the cylinder (4), and the flushing connector (10) is disconnected from the oil passage (16).

7. An automatic supply catheter assembly, characterized in that, It is composed of an automatic supply conduit as described in any one of claims 1 to 5.

8. A method for operating the automatic supply catheter assembly as described in claim 7, characterized in that, Includes the following steps: The automatic supply conduit (21) is connected to the corresponding oil passage hole, and the oil passage hole of the housing (22) is cleaned according to the process. During the oil passage hole cleaning process, the automatic supply conduit (21) is always connected to the corresponding oil passage hole until the oil passage hole cleaning process of the housing (22) is completed.

9. A method for detecting the airtightness of an automatic supply catheter as described in any one of claims 1 to 5, characterized in that, Includes the following steps: Block the supply tube (7), connect the flushing connector (10) with the air tube, and place the end of the air tube in the water; Compressed air is injected into the first air inlet connector (2) and the second air inlet connector (11) in turn. At the same time, observe whether there are bubbles coming out of the water basin. When the first air inlet connector (2) is injected, the second air inlet connector (11) is sealed. When the second air inlet connector (11) is injected, the first air inlet connector (2) is sealed. If no bubbles emerge from the water, it indicates that the oil-gas chamber and the gas chamber are well sealed and there is no leakage. If bubbles emerge, it indicates that the gas in the gas chamber can penetrate into the oil-gas chamber, and the sealing performance is unqualified.

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