Chemical plating device for micropores in side wall of pipe fitting
By designing an electroless plating device for micropores on the side walls of the pipe fittings, the rotation and sealing structure ensure that chemical liquid flows into the micropores is solved, and the problems of bubble barriers and unnecessary nickel layer deposition are significantly improved.
Patent Information
- Application Number
- CN202510388438.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-06-20
AI Technical Summary
The prior art is prone to bubble barriers and unnecessary nickel layer deposition during the micropore electroless plating process of pipe fittings, resulting in low plating quality.
An electroless plating device for micropores on the side wall of the pipe fitting is designed, including a base, plug, press and sealing member, which ensures that chemical liquid flows into the micropores while avoiding bubble formation, and prevents unnecessary deposition of nickel layers through the sealing step hole.
The electroless plating quality of the micropores of the pipe fittings is significantly improved, ensuring that the nickel layer is fully plated on the inner wall of the micropores without bubble interference, and improving the integrity and quality of the plating.
Smart Images
Figure CN120174357A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electroless plating a nickel layer on the inner wall of micropores of pipe fittings, and particularly to an electroless plating device for micropores on the side wall of pipe fittings. Background Art
[0002] The structure of the pipe fittings produced in a certain workshop is as Figures 1 to 2 shown. It includes a pipe fitting body 1 and a disc 2 fixedly arranged at the bottom of the pipe fitting body 1. A stepped hole 3 communicating with the inner hole of the pipe fitting body 1 is formed in the disc 2. A tapered hole 4 is formed on the cylindrical surface of the pipe fitting body 1 and at its lower end. A micropore 5 is formed at the bottom of the tapered hole 4. The micropore 5 communicates with the inner hole of the pipe fitting body 1, and the aperture of the micropore 5 is 0.5 mm.
[0003] When a certain number of pipe fittings are produced in the workshop, the process requires electroless plating a nickel layer in the micropores 5 of the pipe fittings. The specific electroless plating method is as follows: Workers place the pipe fittings upright in a basket, and then put the basket into a plating bath filled with chemical solution. The chemical solution flows into the micropores 5 of the pipe fittings, so as to electroless plate a nickel layer on the inner wall of the micropores 5. After waiting for a period of time, the basket is taken out of the plating bath, and then the pipe fittings with electroless plating are taken away.
[0004] However, although this method can electroless plate a nickel layer in the micropores 5 of the pipe fittings, there are still the following technical defects in terms of technology: I. When the pipe fittings are lowered into the plating bath, bubbles may be formed at the micropores 5 or the tapered holes 4. The bubbles prevent the chemical agent from entering the micropores 5, resulting in no nickel layer being plated on the inner wall of the micropores 5, or the inner wall of the micropores 5 not being fully plated, thus reducing the quality of electroless plating.
[0005] II. The stepped holes 3 of the pipe fittings are exposed to the outside, causing the inner walls of the stepped holes 3 to also be electroless plated with a nickel layer. However, the process requires that the inner walls of the stepped holes 3 are not electroless plated after the pipe fittings are electroless plated, thus further reducing the quality of electroless plating.
[0006] Therefore, there is an urgent need for an electroless plating device and method that can greatly improve the quality of electroless plating of micropores of pipe fittings. Summary of the Invention
[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an electroless plating device for micropores on the side wall of pipe fittings that can greatly improve the quality of electroless plating of micropores of pipe fittings.
[0008] The object of the present invention is achieved by the following technical solutions: A chemical plating device for micropores on the side wall of a pipe fitting, which comprises a base 6, a plug-in member, a pressing member and a plugging member. A counterbore 7 and a straight hole 8 are successively formed along the axial direction inside the base 6. The straight hole 8 is communicated with the counterbore 7. A threaded hole A9 is formed on the right cylindrical surface of the base 6. A radial hole 10 communicating with the straight hole 8 is formed at the bottom of the threaded hole A9. The plug-in member includes a large rod member 11 and a small rod member 12 fixedly connected together in sequence. An annular boss 13 is welded on the outer cylindrical surface of the large rod member 11. A threaded hole B14 is formed on the right end surface of the large rod member 11. A liquid inlet channel 15 penetrating the left end surface of the small rod member 12 along its axial direction is formed at the bottom of the threaded hole B14. A sealing ring 16 is sleeved on the small rod member 12, and the sealing ring 16 abuts against the shoulder surface between the small rod member 12 and the large rod member 11. The pressing member includes a knob 17 and a pressing head 18 fixedly connected together in sequence. A through hole 19 penetrating the knob 17 and the pressing head 18 along its axial direction is formed inside the pressing member. External threads are formed on the outer cylindrical surface of the pressing head 18, and the external threads of the pressing head 18 are matched with the threaded hole A9 of the base 6. The plugging member includes a plug 20 and an annular block 21 fixedly connected together in sequence. A threaded hole C22 is formed inside the annular block 21. A liquid outlet channel 23 arranged along its axial direction is formed inside the plug 20. The liquid outlet channel 23 is communicated with the threaded hole C22. The bottom of the liquid outlet channel 23 is closed, and a stop 24 is formed on the right side of the closed end. The stop 24 is communicated with the liquid outlet channel 23.
[0009] The diameter of the counterbore 7 is larger than the diameter of the disc 2 of the pipe fitting, and the diameter of the straight hole 8 is equal to the diameter of the pipe fitting body 1 of the pipe fitting.
[0010] The diameter of the radial hole 10 is equal to the diameter of the tapered hole 4 of the pipe fitting.
[0011] The large rod member 11, the small rod member 12 and the annular boss 13 of the plug-in member are coaxially arranged.
[0012] The diameter of the through hole 19 of the pressing member is equal to the outer diameter of the large rod member 11 of the plug-in member.
[0013] The outer diameter of the plug 20 of the plugging member is equal to the inner diameter of the pipe fitting body 1 of the pipe fitting.
[0014] A method for chemical plating of micropores on the side wall of a pipe fitting, which comprises the following steps: S1. Fixing the pipe fitting to be chemically plated, and the specific operation steps are as follows: S11. The worker takes out a pipe fitting to be chemically plated, penetrates the pipe fitting body 1 of the pipe fitting from bottom to top through the straight hole 8 of the base 6, and makes the top surface of the disc 2 of the pipe fitting contact with the bottom of the counterbore 7. S212. The worker rotates the top end of the pipe fitting body 1 of the pipe fitting in the horizontal plane direction. The pipe fitting body 1 rotates around its own axis, driving the micro-holes 5 and the tapered holes 4 inside it to rotate synchronously. At the same time, the worker observes the position of the tapered hole 4 from the threaded hole A9 of the base 6. When it is observed that the tapered hole 4 of the pipe fitting is connected to the radial hole 10 of the base 6, the worker stops rotating the top end of the pipe fitting body 1; S13. The worker sequentially passes the sealing ring 16 of the plug-in part from right to left through the threaded hole A9 and the radial hole 10, and finally inserts it into the tapered hole 4 of the pipe fitting. At this time, the sealing ring 16 is in contact with the tapered surface of the tapered hole 4, and the annular boss 13 of the plug-in part is just located in the threaded hole A9. At the same time, the right end of the large rod 11 of the plug-in part is outside the threaded hole A9; S14. The worker sleeves the optical hole 19 in the pressing part on the right end of the large rod 11 of the plug-in part, and then the worker rotates the knob 17 of the pressing part. The knob 17 drives the pressing head 18 to rotate synchronously, so that the external thread of the pressing head 18 is threadedly connected to the threaded hole A9. When rotated a certain number of turns, the left end surface of the pressing head 18 of the pressing part abuts against the right end surface of the annular boss 13 of the plug-in part. Under the action of the abutting force, the sealing ring 16 expands and seals the tapered hole 4 of the pipe fitting. At the same time, the pipe fitting body 1 of the pipe fitting is fixed in the straight hole 8 of the base 6, thus finally realizing the fixation of the pipe fitting; S2. Block the stepped hole 3 of the pipe fitting: The worker takes out the blocking part and inserts the plug 20 of the blocking part into the inner hole of the pipe fitting body 1 from top to bottom, and abuts the annular block 21 of the blocking part against the top surface of the pipe fitting body 1. At this time, the stop 24 of the plug 20 is communicated with the micro-hole 5 of the pipe fitting, and at the same time, the bottom surface of the plug 20 blocks the stepped hole 3 of the pipe fitting; S3. The worker threadedly connects the threaded head of the joint B25 to the threaded hole B14 of the plug-in part to fix the joint B25 on the large rod 11 of the plug-in part, and then the worker threadedly connects the threaded head of the joint C26 to the threaded hole C22 of the blocking part to fix the joint C26 on the annular block 21 of the blocking part; S4. The worker connects the right port of the joint B25 to the liquid outlet pipe of the pump, and inserts the liquid suction pipe of the pump into the plating tank filled with chemical liquid; connect a hose at the joint C26 and insert the hose into the recovery tank; S5. The worker turns on the pump. The pump pumps out the chemical liquid in the plating tank. Under the pump pressure, the chemical liquid in the plating tank sequentially passes through the liquid suction pipe of the pump, the pump, the liquid outlet pipe of the pump, the joint B25, the liquid inlet channel 15 of the plug-in part, the tapered hole 4 of the pipe fitting, the micro-hole 5 of the pipe fitting, the liquid outlet channel 23 of the blocking part, the joint C26, and finally returns to the recovery tank through the hose. Among them, when the chemical liquid flows through the micro-hole 5, a nickel layer can be chemically plated on the inner wall of the micro-hole 5; when the chemical plating is carried out for a period of time, the pump is turned off, thus finally realizing plating a nickel layer on the inner wall of the micro-hole 5 of the pipe fitting; S6. Removal of pipe fittings: Remove the joint B25 and joint C26; then pull out the plug 20 of the plugging member from the pipe fitting; then rotate the knob 17 of the pressing member in the reverse direction to withdraw the pressing head 18 of the pressing member from the large rod member 11. After withdrawal, the worker removes the plug-in member from the base 6.
[0015] The present invention has the following advantages: greatly improving the quality of electroless plating on the micropores of pipe fittings. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of a pipe fitting; Figure 2 is Figure 1 the main sectional view of Figure 3 It is a schematic structural diagram of the base of the present invention; Figure 4 is Figure 3 the main sectional view of Figure 5 It is a schematic structural diagram of the plug-in member of the present invention; Figure 6 is Figure 5 the main sectional view of Figure 7 It is a schematic structural diagram of the pressing member of the present invention; Figure 8 is Figure 7 the main sectional view of Figure 9 It is a schematic structural diagram of the plugging member of the present invention; Figure 10 is Figure 9 the main sectional view of Figure 11 It is a schematic diagram showing the communication between the tapered hole of the pipe fitting and the radial hole of the base; Figure 12 It is a schematic diagram showing the contact between the sealing ring of the plug-in member and the tapered surface of the tapered hole; Figure 13 It is a schematic diagram showing the left end face of the pressing head of the pressing member pressing against the right end face of the annular boss of the plug-in member; Figure 14 It is a schematic diagram showing the bottom surface of the plug of the plugging member plugging the stepped hole of the pipe fitting; Figure 15 It is a schematic diagram showing the fixing of joint C on the annular block of the plugging member; In the figure: 1 - pipe fitting body, 2 - disc, 3 - stepped hole, 4 - tapered hole, 5 - micropore; 6 - base, 7 - counterbore, 8 - straight hole, 9 - threaded hole A, 10 - radial hole; 11 - Large rod member, 12 - Small rod member, 13 - Annular boss, 14 - Threaded hole B, 15 - Liquid inlet channel, 16 - Sealing ring; 17 - Knob, 18 - Pressing head, 19 - Light hole; 20 - Plug, 21 - Annular block, 22 - Threaded hole C, 23 - Liquid outlet channel, 24 - Stopper; 25 - Connector B, 26 - Connector C. Detailed implementation manner
[0017] The following further describes the present invention in conjunction with the accompanying drawings. The protection scope of the present invention is not limited to the following: As Figures 3 to 10 shown, a chemical plating device for micropores on the side wall of a pipe fitting includes a base 6, a plug-in member, a pressing member, and a plugging member. A counterbore 7 and a straight hole 8 are sequentially formed in the base 6 along its axial direction. The straight hole 8 is communicated with the counterbore 7. A threaded hole A9 is formed on the right cylindrical surface of the base 6. A radial hole 10 communicated with the straight hole 8 is formed at the bottom of the threaded hole A9. The diameter of the radial hole 10 is equal to the diameter of the tapered hole 4 of the pipe fitting. The diameter of the counterbore 7 is larger than the diameter of the disc 2 of the pipe fitting, and the diameter of the straight hole 8 is equal to the diameter of the pipe fitting body 1 of the pipe fitting.
[0018] As Figures 5 to 6 shown, the plug-in member includes a large rod member 11 and a small rod member 12 fixedly connected together in sequence. An annular boss 13 is welded on the outer cylindrical surface of the large rod member 11. A threaded hole B14 is formed on the right end surface of the large rod member 11. A liquid inlet channel 15 penetrating the left end surface of the small rod member 12 along its axial direction is formed at the bottom of the threaded hole B14. A sealing ring 16 is sleeved on the small rod member 12, and the sealing ring 16 abuts against the shoulder surface between the small rod member 12 and the large rod member 11. The large rod member 11, the small rod member 12, and the annular boss 13 of the plug-in member are coaxially arranged.
[0019] As Figures 7 to 8 shown, the pressing member includes a knob 17 and a pressing head 18 fixedly connected together in sequence. A light hole 19 penetrating the knob 17 and the pressing head 18 along its axial direction is formed in the pressing member. External threads are formed on the outer cylindrical surface of the pressing head 18, and the external threads of the pressing head 18 are matched with the threaded hole A9 of the base 6. The diameter of the light hole 19 of the pressing member is equal to the outer diameter of the large rod member 11 of the plug-in member.
[0020] As Figures 9 to 10As shown, the plugging member includes a plug head 20 and an annular block 21 fixedly connected together in sequence. A threaded hole C22 is formed in the annular block 21. A liquid outlet channel 23 is formed in the plug head 20 along its axial direction. The liquid outlet channel 23 is communicated with the threaded hole C22. The bottom of the liquid outlet channel 23 is closed, and a stop port 24 is formed on the right side of the closed end. The stop port 24 is communicated with the liquid outlet channel 23. The outer diameter of the plug head 20 of the plugging member is equal to the inner diameter of the pipe body 1 of the pipe fitting.
[0021] A method for electroless plating of micropores on the side wall of a pipe fitting, which comprises the following steps: S1. Fixing of the pipe fitting to be electroless plated, and its specific operation steps are as follows: S11. A worker takes out a pipe fitting to be electroless plated, passes the pipe body 1 of the pipe fitting through the straight hole 8 of the base 6 from bottom to top, and makes the top surface of the disc 2 of the pipe fitting contact the bottom of the counterbore 7; S212. The worker rotates the top end of the pipe body 1 of the pipe fitting in the horizontal plane direction. The pipe body 1 rotates around its own axis. The pipe body 1 drives the micropores 5 and the tapered hole 4 inside it to rotate synchronously. At the same time, the worker observes the position of the tapered hole 4 from the threaded hole A9 of the base 6. When it is observed that the tapered hole 4 of the pipe fitting is communicated with the radial hole 10 of the base 6, as Figure 11 shown, the worker stops rotating the top end of the pipe body 1; S13. The worker sequentially passes the sealing ring 16 of the plug-in member from right to left through the threaded hole A9 and the radial hole 10, and finally inserts it into the tapered hole 4 of the pipe fitting. At this time, the sealing ring 16 contacts the tapered surface of the tapered hole 4, as Figure 12 shown, and the annular boss 13 of the plug-in member is just located in the threaded hole A9. At the same time, the right end of the large rod 11 of the plug-in member is located outside the threaded hole A9; S14. The worker sleeves the optical hole 19 in the pressing member on the right end of the large rod 11 of the plug-in member, and then the worker rotates the knob 17 of the pressing member. The knob 17 drives the pressing head 18 to rotate synchronously, so that the external thread of the pressing head 18 is threadedly connected with the threaded hole A9. When rotated for a certain number of turns, the left end surface of the pressing head 18 of the pressing member abuts against the right end surface of the annular boss 13 of the plug-in member, as Figure 13 shown. Under the action of the pressing force, the sealing ring 16 expands and seals the tapered hole 4 of the pipe fitting. At the same time, the pipe body 1 of the pipe fitting is fixed in the straight hole 8 of the base 6, so as to finally realize the fixation of the pipe fitting, as Figure 13 shown; S2. Seal the stepped hole 3 of the pipe fitting: The worker takes out the sealing piece, inserts the plug 20 of the sealing piece into the inner hole of the pipe fitting body 1 from top to bottom, and abuts the annular block 21 of the sealing piece against the top surface of the pipe fitting body 1. At this time, the stop 24 of the plug 20 communicates with the micro-hole 5 of the pipe fitting. At the same time, the bottom surface of the plug 20 seals the stepped hole 3 of the pipe fitting, as Figure 14 shown; S3. The worker threadedly connects the threaded head of the joint B25 to the threaded hole B14 of the plug-in part to fix the joint B25 on the large rod 11 of the plug-in part, as Figure 15 shown. Then the worker connects the threaded head of the joint C26 to the threaded hole C22 of the sealing piece to fix the joint C26 on the annular block 21 of the sealing piece, as Figure 15 shown; S4. The worker connects the right port of the joint B25 to the liquid outlet pipe of the pump, and inserts the liquid suction pipe of the pump into the plating tank filled with chemical liquid; connect a hose at the joint C26 and insert the hose into the recovery tank; S5. The worker turns on the pump, and the pump pumps out the chemical liquid in the plating tank. The extraction direction of the chemical liquid is as Figure 15 shown by the arrow in. Under the pump pressure, the chemical liquid in the plating tank sequentially passes through the liquid suction pipe of the pump, the pump, the liquid outlet pipe of the pump, the joint B25, the liquid inlet channel 15 of the plug-in part, the tapered hole 4 of the pipe fitting, the micro-hole 5 of the pipe fitting, the liquid outlet channel 23 of the sealing piece, and the joint C26, and finally flows back to the recovery tank through the hose. Among them, when the chemical liquid flows through the micro-hole 5, a nickel layer can be chemically plated on the inner wall of the micro-hole 5; after chemical plating for a period of time, the pump is turned off, thus finally achieving a nickel layer plated on the inner wall of the micro-hole 5 of the pipe fitting; S6. Removal of the pipe fitting: Remove the joint B25 and the joint C26; then pull out the plug 20 of the sealing piece from the pipe fitting; then rotate the knob 17 of the pressing part in the reverse direction, so that the pressing head 18 of the pressing part exits from the large rod 11. After exiting, the worker takes out the plug-in part from the base 6.
[0022] Among them, in step S2, since the stepped hole 3 of the pipe fitting is sealed by the bottom surface of the plug 20 of the sealing piece, therefore, in step S5, the chemical liquid will not flow into the stepped hole 3, so that a nickel layer will not be plated in the stepped hole 3 of the pipe fitting. It can be seen that compared with the chemical plating method in the workshop, this chemical plating device greatly improves the chemical plating quality of the micro-hole 5 of the pipe fitting.
[0023] In addition, as can be seen from step S5, the chemical liquid flows through the micro-hole 5 of the pipe fitting under the pump pressure of the pump. Compared with the chemical plating method in the workshop, no bubbles will be formed at the micro-hole 5 or the tapered hole 4, ensuring that a nickel layer can be chemically plated on the inner wall of the micro-hole 5, and thus achieving a full nickel plating layer, further greatly improving the chemical plating quality of the micro-hole of the pipe fitting.
[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A chemical plating device for micropores on the side wall of a pipe, characterized in that: It comprises a base (6), a plug-in component, a pressing component and a blocking component. The base (6) is provided with a countersunk hole (7) and a straight hole (8) in sequence along its axial direction. The straight hole (8) is connected to the countersunk hole (7). A threaded hole A (9) is provided on the right cylindrical surface of the base (6). A radial hole (10) connected to the straight hole (8) is provided at the bottom of the threaded hole A (9). The plug-in connector comprises a large rod (11) and a small rod (12) which are fixedly connected in sequence. An annular boss (13) is welded on the outer cylindrical surface of the large rod (11). A threaded hole B (14) is provided on the right end surface of the large rod (11). A liquid inlet channel (15) is provided at the bottom of the threaded hole B (14) and passes through the left end surface of the small rod (12) along its axial direction. A sealing ring (16) is sleeved on the small rod (12), and the sealing ring (16) abuts against the shoulder surface between the small rod (12) and the large rod (11). The clamping member comprises a knob (17) and a pressure head (18) which are fixedly connected in sequence. A light hole (19) is provided in the clamping member and passes through the knob (17) and the pressure head (18) along its axial direction. An external thread is provided on the outer cylindrical surface of the pressure head (18). The external thread of the pressure head (18) matches with the threaded hole A (9) of the base (6). The plugging member comprises a plug (20) and an annular block (21) which are fixedly connected in sequence. A threaded hole C (22) is provided in the annular block (21). A liquid outlet channel (23) is provided in the plug (20) along its axial direction. The liquid outlet channel (23) is connected to the threaded hole C (22). The bottom of the liquid outlet channel (23) is closed, and a stopper (24) is provided on the right side of the closed end. The stopper (24) is connected to the liquid outlet channel (23).
2. The chemical plating device for micropores on the side wall of a pipe according to claim 1, characterized in that: The diameter of the countersunk hole (7) is larger than the diameter of the circular disc (2) of the pipe fitting, and the diameter of the straight hole (8) is equal to the diameter of the pipe fitting body (1) of the pipe fitting.
3. The chemical plating device for micropores on the side wall of a pipe according to claim 2, characterized in that: The diameter of the radial hole (10) is equal to the diameter of the tapered hole (4) of the pipe.
4. The chemical plating device for micropores on the side wall of a pipe according to claim 3, characterized in that: The large rod (11), the small rod (12) and the annular boss (13) of the connector are coaxially arranged.
5. The chemical plating device for micropores on the side wall of a pipe according to claim 4, characterized in that: The diameter of the light hole (19) of the pressing piece is equal to the outer diameter of the large rod (11) of the plug-in piece.
6. The chemical plating device for micropores on the side wall of a pipe according to claim 5, characterized in that: The outer diameter of the plug (20) of the plugging piece is equal to the inner diameter of the pipe body (1) of the pipe.
7. A method for chemical plating of micropores on the side wall of a pipe, using the chemical plating device for micropores on the side wall of a pipe as claimed in claim 6, characterized in that: It includes the following steps: S1. Fixing of pipes to be chemically plated. The specific operation steps are as follows: S11, a worker takes out a pipe to be chemically plated, passes the pipe body (1) of the pipe from bottom to top through the straight hole (8) of the base (6), and makes the top surface of the disc (2) of the pipe contact with the bottom of the countersunk hole (7); S212, the worker rotates the top end of the pipe body (1) of the pipe fitting in the horizontal direction, the pipe body (1) rotates around its own axis, and the pipe body (1) drives the micro hole (5) and the tapered hole (4) therein to rotate synchronously. At the same time, the worker observes the position of the tapered hole (4) from the threaded hole A (9) of the base (6). When it is observed that the tapered hole (4) of the pipe fitting is connected to the radial hole (10) of the base (6), the worker stops rotating the top end of the pipe body (1); S13. The worker inserts the sealing ring (16) of the plug-in component through the threaded hole A (9) and the radial hole (10) from right to left, and finally inserts it into the tapered hole (4) of the pipe fitting. At this time, the sealing ring (16) contacts the conical surface of the tapered hole (4), and the annular boss (13) of the plug-in component is just inside the threaded hole A (9). At the same time, the right end of the large rod (11) of the plug-in component is outside the threaded hole A (9). S14. The worker puts the light hole (19) in the clamping piece onto the right end of the large rod (11) of the connector, and then rotates the knob (17) of the clamping piece. The knob (17) drives the pressure head (18) to rotate synchronously, so that the external thread of the pressure head (18) is threadedly connected with the threaded hole A (9). After a certain number of rotations, the left end face of the pressure head (18) of the clamping piece presses against the right end face of the annular boss (13) of the connector. Under the action of the pressing force, the sealing ring (16) expands and seals the tapered hole (4) of the pipe fitting. At the same time, the pipe fitting body (1) of the pipe fitting is fixed in the straight hole (8) of the base (6), thereby finally achieving the fixation of the pipe fitting. S2. Blocking the stepped hole (3) of the pipe fitting: the worker takes out the blocking piece, inserts the plug (20) of the blocking piece into the inner hole of the pipe fitting body (1) from top to bottom, and places the annular block (21) of the blocking piece against the top surface of the pipe fitting body (1). At this time, the stopper (24) of the plug (20) is connected to the micropore (5) of the pipe fitting, and at the same time, the bottom surface of the plug (20) blocks the stepped hole (3) of the pipe fitting; S3. The worker threadably connects the threaded head of the connector B (25) to the threaded hole B (14) of the plug-in component to fix the connector B (25) to the large rod (11) of the plug-in component, and then connects the threaded head of the connector C (26) to the threaded hole C (22) of the plug-in component to fix the connector C (26) to the annular block (21) of the plug-in component; S4. The worker connects the right end of connector B (25) to the liquid outlet pipe of the pump, and extends the liquid extraction pipe of the pump into the plating tank containing the chemical liquid; connects a hose at connector C (26), and extends the hose into the recovery tank; S5. The worker turns on the pump, and the pump extracts the chemical liquid in the plating tank. Under the pressure of the pump, the chemical liquid in the plating tank flows through the pump's liquid extraction pipe, the pump, the pump's liquid outlet pipe, the connector B (25), the liquid inlet channel (15) of the connector, the conical hole (4) of the pipe fitting, the micropore (5) of the pipe fitting, the liquid outlet channel (23) of the plugging member, the connector C (26), and finally flows back to the recovery tank through the hose. When the chemical liquid flows through the micropore (5), a nickel layer can be chemically plated on the inner wall of the micropore (5). After a period of chemical plating, the pump is turned off, thereby finally achieving a nickel layer on the inner wall of the micropore (5) of the pipe fitting. S6. Removal of pipe fittings: Remove connector B (25) and connector C (26); then remove the plug (20) of the plugging member from the pipe fitting; then rotate the knob (17) of the pressing member in the opposite direction to remove the pressing head (18) of the pressing member from the large rod (11). After removal, the worker removes the connector from the base (6).