A water-saving method for horizontal lines on the surface of printed circuit boards

Abstract

This invention discloses a water-saving method for horizontal lines in the surface treatment of printed circuit boards (PCBs), relating to the field of PCB manufacturing technology. The water-saving method is implemented using a water-saving device for horizontal lines in PCB surface treatment. This device includes a cleaning tank with a first tank, a second tank, and a third tank sequentially arranged from left to right at the top. A drive motor is fixedly mounted on the bottom right side of the cleaning tank. A drive shaft is rotatably nested inside the third tank and is connected to the drive motor. A back plate is slidably fitted onto the outside of the drive shaft. This invention effectively reduces the water level difference between the three tanks, thereby effectively cleaning the PCB while reducing the amount of deionized water used, thus lowering PCB production costs and reducing water waste.

Description

Technical Field

[0001] This invention relates to the field of PCB manufacturing technology, and in particular to a water-saving method for horizontal lines on the surface of printed circuit boards. Background Technology

[0002] In the actual production and processing of PCBs, they go through many horizontal production lines that perform surface treatments, such as OSP anti-oxidation lines, immersion tin lines, and immersion silver lines. These horizontal production lines are equipped with a triple water rinse after the chemical bath. In order to ensure that the ion contamination level is below the standard, deionized water is used as the cleaning water source. Since most of the triple water rinses in the current technology are carried out by direct rinsing, the water in the three water tanks will continue to overflow, which will result in a large amount of deionized water being wasted.

[0003] In response to the above situation, those skilled in the art have conceived of setting overflow channels on the second and third water tanks. During the PCB production process, deionized water is continuously fed into the third water tank. After the third water tank is full, the deionized water enters the second water tank through the overflow channel. After the second water tank is full, the deionized water enters the first water tank through the overflow channel. When the PCB passes through the first, second, and third water tanks in sequence, the PCB can also be effectively cleaned.

[0004] However, after practical application by those skilled in the art, the above method still has some drawbacks. The most obvious one is that in order to facilitate overflow and avoid backflow, the water level in the first tank, the second tank, and the third tank must decrease sequentially. Furthermore, the water level in the third tank must be higher than the PCB height to achieve cleaning. This results in the water level in the first and second tanks needing to be much higher than the PCB height, which still leads to some waste of water resources.

[0005] Therefore, it is necessary to invent a water-saving method suitable for the horizontal line of printed circuit board surface treatment to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a water-saving method for horizontal lines on the surface of printed circuit boards, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a water-saving method for horizontal lines on the surface of printed circuit boards. This water-saving method is implemented using a water-saving device for horizontal lines on the surface of printed circuit boards. The water-saving device includes a cleaning tank. The top of the cleaning tank has a first tank, a second tank, and a third tank sequentially arranged from left to right. A drive motor is fixedly installed at the bottom right side of the cleaning tank. A drive shaft is rotatably nested inside the third tank and is connected to the drive motor. A back plate is slidably sleeved on the outside of the drive shaft and fixedly installed at the bottom inner side of the third tank. Water supply components are fixedly installed at the bottom inner sides of both the first and second tanks. Each set of water supply components includes a drainage mechanism, a drive mechanism, a sealing mechanism, and a blocking mechanism. The drive mechanism is rotatably nested inside the drainage mechanism. The sealing mechanism is fixedly installed on the right side inside the drainage mechanism. The blocking mechanism is installed inside the drainage mechanism and at the top of the drainage mechanism.

[0008] The drainage mechanism includes a square shell, a water inlet channel, a piston plate, a first limiting groove, and a first limiting slider;

[0009] The two square shells are respectively fixedly nested in the bottom rear side of the inner cavity of the first water tank and the second water tank. The water inlet channel is opened at the top of the square shell. The piston plate is slidably arranged in the horizontal direction inside the square shell. The first limiting groove is opened at the bottom of the inner side of the square shell. The first limiting slider is slidably arranged in the inner side of the first limiting groove and is fixedly connected to the piston plate.

[0010] Preferably, the driving mechanism includes a reciprocating lead screw, a first clearance groove, a second clearance groove, a water inlet, a water outlet, an I-beam slide bar, a first sliding ring, and a second sliding ring.

[0011] Preferably, the drive shaft is fixedly connected to an adjacent reciprocating lead screw, the two reciprocating lead screws are fixedly connected, the reciprocating lead screw passes through the square housing and is rotatably connected to the square housing through bearings, the piston plate is sleeved on the outside of the reciprocating lead screw and is drivenly connected to the reciprocating lead screw through reciprocating threads, the first clearance groove, the second clearance groove, the water inlet and the water outlet are sequentially opened on the outside of the reciprocating lead screw from left to right, the I-beam slide rod is slidably nested inside the reciprocating lead screw, the two ends of the I-beam slide rod are respectively slidably disposed inside the first clearance groove and the second clearance groove, and the first sliding ring and the second sliding ring are respectively rotatably sleeved on the two ends of the outside of the first clearance groove through bearings.

[0012] Preferably, the sealing mechanism includes a sealing plate, a first reset spring, a second limiting groove, and a second limiting slider.

[0013] Preferably, the sealing plate is slidably disposed on the inner side of the square housing in the horizontal direction and slidably sleeved on the outer side of the reciprocating screw. One end of the first reset spring is fixedly connected to the sealing plate and the other end is fixedly connected to the inner wall of the square housing. The second limiting groove is opened at the top of the inner side of the square housing, and the second limiting slider is slidably disposed on the inner side of the second limiting groove and fixedly connected to the sealing plate.

[0014] Preferably, the blocking mechanism includes a fixed plate, an annular magnet, a third clearance groove, an L-shaped slide bar, a second reset spring, and a blocking plate.

[0015] Preferably, the fixing plate is located inside the square shell, the annular magnet is fixedly disposed on the outside of the fixing plate and fixedly connected to the inner wall of the square shell, the third clearance groove is opened on the top left side of the square shell, the L-shaped slide rod is slidably disposed inside the third clearance groove and fixedly connected to the first sliding ring, one end of the second reset spring is fixedly connected to the inner wall of the third clearance groove and the other end is fixedly connected to the L-shaped slide rod, and the blocking plate is fixedly disposed at the top of the L-shaped slide rod and slidably disposed at the top of the square shell.

[0016] Preferably, the water-saving method for the horizontal line of printed circuit board surface treatment specifically includes the following steps:

[0017] S1. After the drive motor starts, it drives the drive shaft to rotate. When the drive shaft rotates, it drives the adjacent reciprocating lead screw to rotate. When the reciprocating lead screw rotates, it drives another reciprocating lead screw to rotate at the same time. During the rotation of the reciprocating lead screw, the piston plate, which is restricted by the first limiting groove and the first limiting slider, moves continuously to the left.

[0018] S2. During the process of piston plate moving to the left, the water storage chamber formed by piston plate, sealing plate and square shell gradually increases in size, while the air pressure gradually decreases. When the piston plate moves a distance of the first threshold, the water inlet channel is connected to the water storage chamber. At this time, the deionized water in the first water tank quickly passes through the water inlet channel and enters the water storage chamber under the action of negative pressure.

[0019] S3. When the piston plate moves to the second threshold, the piston plate contacts the first sliding ring. As the piston plate continues to move to the left, the piston plate pushes the first sliding ring to move to the left in sync. When the first sliding ring moves to the left, it drives the second sliding ring to move in sync through the I-shaped slide rod. At the same time, the first sliding ring drives the blocking plate to block the water inlet channel through the L-shaped slide rod. When the third clearance slide moves to the left, it compresses the second reset spring.

[0020] S4. When the piston plate moves to the third threshold, the piston plate moves to the leftmost end of the reciprocating thread on the outside of the square housing. At this time, the first sliding ring is in contact with the fixed plate, and the blocking plate completes the sealing of the water inlet channel. At this time, the fixed plate adsorbs and fixes the first sliding ring. Subsequently, as the reciprocating screw continues to rotate, the piston plate continues to move to the right along the reciprocating screw.

[0021] S5. During the rightward movement of the piston plate, the deionized water inside the water storage chamber is continuously pushed, and the pressure inside the water storage chamber gradually increases. As the piston plate moves rightward continuously, the sealing plate moves rightward under the water pressure and compresses the first reset spring.

[0022] S6. When the piston plate moves to the fourth threshold, the piston plate, which moves to the right, releases the blockage of the water inlet. At this time, the deionized water inside the water storage chamber continuously enters the reciprocating screw through the water inlet and then enters the second water tank through the water outlet. When the deionized water is output through the water inlet, the reciprocating screw drives the water inlet to rotate continuously, thereby causing the deionized water to be rotated and output.

[0023] S7. When the piston plate moves to the fifth threshold, the piston plate moves to the right side of the water inlet channel and simultaneously comes into contact with the second sliding ring. As the piston plate continues to move, the piston plate drives the first sliding ring to the right through the second sliding ring and the I-shaped slide rod. After the first sliding ring moves to the right, it is no longer attracted by the fixed plate. At this time, the compressed second reset spring pushes the L-shaped slide rod to reset the blocking plate, thereby releasing the blockage of the water inlet channel.

[0024] S8. When the piston plate moves to the sixth threshold, the piston plate reaches the rightmost end of the reciprocating thread on the outside of the reciprocating screw. As the reciprocating screw continues to rotate, the piston plate moves to the left again to draw in deionized water. After the water supply component inside the first water tank inputs deionized water into the second water tank, the water supply component inside the second water tank simultaneously inputs deionized water into the third water tank.

[0025] S9. After being treated in the chemical tank, the PCB is driven by the suspension equipment to pass through the third water tank, the second water tank and the first water tank in succession. The deionized water in the third water tank removes the residual chemical solution from the PCB surface. The used deionized water is continuously output through the drainage pipe at the bottom of the third water tank. The deionized water in the second water tank exchanges ions for impurities on the board surface and in the holes. The deionized water in the first water tank thoroughly cleans the board surface and in the holes.

[0026] The technical effects and advantages of this invention are as follows:

[0027] This invention incorporates a drainage mechanism, a driving mechanism, a sealing mechanism, and a blocking mechanism. The driving mechanism drives the drainage mechanism, drawing deionized water into the storage chamber. The subsequent drainage mechanism triggers the blocking mechanism, sealing the drainage mechanism and preventing it from being triggered again. This ensures that deionized water in the storage chamber does not flow back during output. Compared to similar devices and methods in the prior art, this invention effectively reduces the water level difference between the three tanks, thus effectively cleaning the PCB while reducing the amount of deionized water used, thereby lowering PCB production costs and reducing water waste. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the present invention.

[0029] Figure 2 This is a front view cross-sectional structural diagram of the drainage mechanism and the sealing mechanism of the present invention.

[0030] Figure 3 This is a front view cross-sectional structural diagram of the drive mechanism of the present invention.

[0031] Figure 4 This is a partial frontal cross-sectional view of the blocking mechanism of the present invention.

[0032] In the diagram: 1. Cleaning tank; 2. Drive motor; 3. Drive shaft; 4. Back plate; 5. Drainage mechanism; 51. Square housing; 52. Water inlet channel; 53. Piston plate; 54. First limiting groove; 55. First limiting slider; 6. Drive mechanism; 61. Reciprocating screw; 62. First clearance groove; 63. Second clearance groove; 64. Water inlet; 65. Water outlet; 66. I-shaped slide bar; 67. First sliding ring; 68. Second sliding ring; 7. Sealing mechanism; 71. Sealing plate; 72. First return spring; 73. Second limiting groove; 74. Second limiting slider; 8. Blocking mechanism; 81. Fixing plate; 82. Ring magnet; 83. Third clearance groove; 84. L-shaped slide bar; 85. Second return spring; 86. Blocking plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] This invention provides, for example Figure 1 -4 illustrates a water-saving method for horizontal lines on the surface of printed circuit boards. This method is implemented using a water-saving device for horizontal lines on the surface of printed circuit boards. The device includes a cleaning tank 1. From left to right, a first tank, a second tank, and a third tank are sequentially formed on the top of the cleaning tank 1. A drive motor 2 is fixedly installed at the bottom right side of the cleaning tank 1. A drive shaft 3 is rotatably nested inside the third tank and is connected to the drive motor 2. A back plate 4 is slidably sleeved on the outside of the drive shaft 3 and fixedly installed at the bottom inner side of the third tank. Water supply components are fixedly installed at the bottom inner sides of both the first and second tanks. Each water supply component includes a drainage mechanism 5, a drive mechanism 6, a sealing mechanism 7, and a blocking mechanism 8. The drive mechanism 6 is rotatably nested inside the drainage mechanism 5. The sealing mechanism 7 is fixedly installed on the right side inside the drainage mechanism 5. The blocking mechanism 8 is located inside the drainage mechanism 5 and at its top.

[0036] like Figure 2 As shown, the drainage mechanism 5 includes a square housing 51, a water inlet channel 52, a piston plate 53, a first limiting groove 54, and a first limiting slider 55. The two square housings 51 are respectively fixedly nested in the bottom rear side of the inner cavity of the first water tank and the second water tank. The water inlet channel 52 is opened at the top of the square housing 51. The piston plate 53 is slidably disposed in the inner side of the square housing 51 in the horizontal direction. The first limiting groove 54 is opened at the bottom of the inner side of the square housing 51. The first limiting slider 55 is slidably disposed in the inner side of the first limiting groove 54 and is fixedly connected to the piston plate 53.

[0037] like Figure 3 As shown, the drive mechanism 6 includes a reciprocating lead screw 61, a first clearance groove 62, a second clearance groove 63, a water inlet 64, a water outlet 65, an I-beam slide bar 66, a first sliding ring 67, and a second sliding ring 68. The drive shaft 3 is fixedly connected to an adjacent reciprocating lead screw 61, and the two reciprocating lead screws 61 are fixedly connected. The reciprocating lead screw 61 passes through a square housing 51 and is rotatably connected to the square housing 51 via bearings. The piston plate 53 is sleeved on the outside of the reciprocating lead screw 61 and is connected to the piston via a bearing. The reciprocating screw 61 is connected to the reciprocating thread through a double thread. The first clearance groove 62, the second clearance groove 63, the water inlet hole 64 and the water outlet hole 65 are sequentially opened on the outside of the reciprocating screw 61 from left to right. The I-shaped slide bar 66 is slidably nested inside the reciprocating screw 61. The two ends of the I-shaped slide bar 66 are respectively slidably disposed inside the first clearance groove 62 and the second clearance groove 63. The first sliding ring 67 and the second sliding ring 68 are respectively rotatably sleeved on the two ends of the outside of the first clearance groove 62 through bearings.

[0038] By setting the above structure, the deionized water that enters the reciprocating screw 61 through the water inlet 64 can enter the second water tank through the water outlet 65. When the deionized water is output through the water inlet 64, the reciprocating screw 61 drives the water inlet 64 to rotate continuously, thereby causing the deionized water to be rotated and output, so that the deionized water output from the first water tank can be quickly mixed with the deionized water in the second water tank.

[0039] like Figure 2 As shown, the sealing mechanism 7 includes a sealing plate 71, a first return spring 72, a second limiting groove 73, and a second limiting slider 74. The sealing plate 71 is slidably disposed on the inner side of the square housing 51 in the horizontal direction and slidably sleeved on the outer side of the reciprocating screw 61. One end of the first return spring 72 is fixedly connected to the sealing plate 71, and the other end is fixedly connected to the inner wall of the square housing 51. The second limiting groove 73 is opened at the top of the inner side of the square housing 51. The second limiting slider 74 is slidably disposed on the inner side of the second limiting groove 73 and fixedly connected to the sealing plate 71.

[0040] By setting the above structure, the first return spring 72 pushes the sealing plate 71, and the second limiting groove 73 and the second limiting slider 74 limit the sealing plate 71, so that the sealing plate 71 continuously covers the outside of the water inlet 64, thereby sealing the water inlet 64 and preventing water inside the second water tank from entering the first chamber through the water outlet 65 and the water inlet 64. In addition, as the piston plate 53 moves to the right, the sealing plate 71 moves to the right under the water pressure and compresses the first return spring 72. Then the piston plate 53 releases the seal on the water inlet 64. At this time, the deionized water inside the water storage chamber continuously enters the reciprocating screw 61 through the water inlet 64.

[0041] like Figure 2 and Figure 4 As shown, the blocking mechanism 8 includes a fixed plate 81, an annular magnet 82, a third clearance groove 83, an L-shaped slide bar 84, a second return spring 85, and a blocking plate 86. The fixed plate 81 is located inside the square housing 51. The annular magnet 82 is fixedly disposed on the outside of the fixed plate 81 and is fixedly connected to the inner wall of the square housing 51. The third clearance groove 83 is opened on the top left side of the square housing 51. The L-shaped slide bar 84 is slidably disposed inside the third clearance groove 83 and is fixedly connected to the first sliding ring 67. One end of the second return spring 85 is fixedly connected to the inner wall of the third clearance groove 83 and the other end is fixedly connected to the L-shaped slide bar 84. The blocking plate 86 is fixedly disposed at the top of the L-shaped slide bar 84 and slidably disposed at the top of the square housing 51.

[0042] By setting up the above structure, when the first sliding ring 67 moves to the left, it drives the second sliding ring 68 to move synchronously through the I-shaped slide rod 66. At the same time, the first sliding ring 67 drives the blocking plate 86 to block the water inlet channel 52 through the L-shaped slide rod 84. When the third clearance slide 83 moves to the left, it compresses the second return spring 85. When the first sliding ring 67 is in contact with the fixing plate 81, the fixing plate 81 adsorbs and fixes the first sliding ring 67. At the same time, the blocking plate 86 completes the blockage of the water inlet channel 52, and the deionized water in the water storage chamber can no longer flow out through the water inlet channel 52. Subsequently, when the piston plate 53 drives the first sliding ring 67 to move to the right through the second sliding ring 68 and the I-shaped slide rod 66, the first sliding ring 67 is no longer adsorbed by the fixing plate 81 after moving to the right. The compressed second return spring 85 pushes the L-shaped slide rod 84 to drive the blocking plate 86 to reset, thereby releasing the blockage of the water inlet channel 52.

[0043] Example 2

[0044] The water-saving method applicable to the horizontal line of printed circuit board surface treatment specifically includes the following steps:

[0045] S1. After the drive motor 2 starts, it drives the drive shaft 3 to rotate. When the drive shaft 3 rotates, it drives the adjacent reciprocating lead screw 61 to rotate. When the reciprocating lead screw 61 rotates, it drives another reciprocating lead screw 61 to rotate at the same time. During the rotation of the reciprocating lead screw 61, it drives the piston plate 53, which is restricted by the first limiting groove 54 and the first limiting slider 55, to move continuously to the left.

[0046] S2, during the process of piston plate 53 on the left, the water storage chamber formed by piston plate 53, sealing plate 71 and square shell 51 gradually increases in size, while the air pressure gradually decreases. When the piston plate 53 moves a distance to the first threshold, the water inlet channel 52 connects with the water storage chamber. At this time, the deionized water in the first water tank quickly passes through the water inlet channel 52 and enters the water storage chamber under the action of negative pressure.

[0047] S3. When the piston plate 53 moves to the second threshold, the piston plate 53 contacts the first sliding ring 67. Subsequently, as the piston plate 53 continues to move to the left, the piston plate 53 pushes the first sliding ring 67 to move to the left in sync. When the first sliding ring 67 moves to the left, it drives the second sliding ring 68 to move in sync through the I-shaped slide rod 66. At the same time, the first sliding ring 67 drives the blocking plate 86 to block the water inlet channel 52 through the L-shaped slide rod 84. When the third clearance slide 83 moves to the left, it compresses the second reset spring 85.

[0048] S4. When the piston plate 53 moves to the third threshold, the piston plate 53 moves to the leftmost end of the reciprocating thread on the outside of the square housing 51. At this time, the first sliding ring 67 is in contact with the fixed plate 81, and the blocking plate 86 completes the sealing of the water inlet channel 52. At this time, the fixed plate 81 adsorbs and fixes the first sliding ring 67. Subsequently, as the reciprocating screw 61 continues to rotate, the piston plate 53 continues to move to the right along the reciprocating screw 61.

[0049] S5. During the rightward movement of piston plate 53, the deionized water inside the water storage chamber is continuously pushed, and the pressure inside the water storage chamber gradually increases. As piston plate 53 moves rightward continuously, sealing plate 71 moves rightward under water pressure and compresses the first reset spring 72.

[0050] S6. When the piston plate 53 moves a distance to the fourth threshold, the piston plate 53, which moves to the right continuously, releases the blockage of the water inlet 64. At this time, the deionized water inside the water storage chamber continuously enters the reciprocating screw 61 through the water inlet 64, and then enters the second water tank through the water outlet 65. When the deionized water is output through the water inlet 64, the reciprocating screw 61 drives the water inlet 64 to rotate continuously, thereby causing the deionized water to be rotated and output.

[0051] S7. When the piston plate 53 moves to the fifth threshold, the piston plate 53 moves to the right side of the water inlet channel 52 and simultaneously comes into contact with the second sliding ring 68. Subsequently, as the piston plate 53 continues to move, the piston plate 53 drives the first sliding ring 67 to move to the right through the second sliding ring 68 and the I-shaped slide rod 66. After the first sliding ring 67 moves to the right, it is no longer attracted by the fixed plate 81. At this time, the compressed second reset spring 85 pushes the L-shaped slide rod 84 to drive the blocking plate 86 to reset, thereby releasing the blockage of the water inlet channel 52.

[0052] S8. When the piston plate 53 moves to the sixth threshold, the piston plate 53 reaches the rightmost end of the reciprocating thread on the outside of the reciprocating screw 61. As the reciprocating screw 61 continues to rotate, the piston plate 53 moves to the left again to draw in deionized water. After the water supply component inside the first water tank inputs deionized water into the second water tank, the water supply component inside the second water tank simultaneously inputs deionized water into the third water tank.

[0053] S9. After being treated in the chemical tank, the PCB is driven by the suspension equipment to pass through the third water tank, the second water tank and the first water tank in succession. The deionized water in the third water tank removes the residual chemical solution from the PCB surface. The used deionized water is continuously output through the drainage pipe at the bottom of the third water tank. The deionized water in the second water tank exchanges ions for impurities on the board surface and in the holes. The deionized water in the first water tank thoroughly cleans the board surface and in the holes.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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 described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water-saving method for horizontal lines on the surface of printed circuit boards, characterized in that: The water-saving method for horizontal lines on the surface of printed circuit boards is implemented by a water-saving device for horizontal lines on the surface of printed circuit boards. The water-saving device for horizontal lines on the surface of printed circuit boards includes a cleaning tank (1). The top of the cleaning tank (1) has a first tank, a second tank, and a third tank arranged sequentially from left to right. A drive motor (2) is fixedly installed at the bottom right side of the cleaning tank (1). A drive shaft (3) is rotatably nested inside the third tank. The drive shaft (3) is connected to the drive motor (2) in a transmission manner. A back plate (4) is provided on the outer side of the sliding sleeve. The back plate (4) is fixedly provided on the bottom of the inner side of the third water tank. Water supply components are fixedly provided on the bottom of the inner side of both the first water tank and the second water tank. Each set of water supply components includes a drainage mechanism (5), a driving mechanism (6), a sealing mechanism (7) and a blocking mechanism (8). The driving mechanism (6) is rotatably nested inside the drainage mechanism (5). The sealing mechanism (7) is fixedly provided on the right side inside the drainage mechanism (5). The blocking mechanism (8) is provided inside the drainage mechanism (5) and on the top of the drainage mechanism (5). The drainage mechanism (5) includes a square housing (51), a water inlet channel (52), a piston plate (53), a first limiting groove (54), and a first limiting slider (55); The two square shells (51) are respectively fixedly nested in the bottom rear side of the inner cavity of the first water tank and the second water tank. The water inlet channel (52) is opened on the top of the square shell (51). The piston plate (53) is slidably arranged in the horizontal direction inside the square shell (51). The first limiting groove (54) is opened in the bottom of the inner side of the square shell (51). The first limiting slider (55) is slidably arranged in the inner side of the first limiting groove (54) and fixedly connected to the piston plate (53). The drive mechanism (6) includes a reciprocating lead screw (61), a first clearance groove (62), a second clearance groove (63), a water inlet (64), a water outlet (65), an I-beam slide bar (66), a first sliding ring (67), and a second sliding ring (68); The drive shaft (3) is fixedly connected to the adjacent reciprocating screw (61), the two reciprocating screws (61) are fixedly connected, the reciprocating screw (61) passes through the square housing (51) and is rotatably connected to the square housing (51) through bearings, the piston plate (53) is sleeved on the outside of the reciprocating screw (61) and is connected to the reciprocating screw (61) through reciprocating threads, the first clearance groove (62), the second clearance groove (63), the water inlet (64) and the water outlet (65) are sequentially opened on the outside of the reciprocating screw (61) from left to right, the I-shaped slide bar (66) is slidably nested inside the reciprocating screw (61), the two ends of the I-shaped slide bar (66) are respectively slidably set inside the first clearance groove (62) and the second clearance groove (63), the first sliding ring (67) and the second sliding ring (68) are respectively rotatably sleeved on the two ends of the outside of the first clearance groove (62) through bearings; The sealing mechanism (7) includes a sealing plate (71), a first reset spring (72), a second limiting groove (73), and a second limiting slider (74); The sealing plate (71) is slidably disposed on the inner side of the square shell (51) in the horizontal direction and slidably sleeved on the outer side of the reciprocating screw (61). One end of the first reset spring (72) is fixedly connected to the sealing plate (71) and the other end is fixedly connected to the inner wall of the square shell (51). The second limiting groove (73) is opened on the top of the inner side of the square shell (51). The second limiting slider (74) is slidably disposed on the inner side of the second limiting groove (73) and fixedly connected to the sealing plate (71). The blocking mechanism (8) includes a fixed plate (81), an annular magnet (82), a third clearance groove (83), an L-shaped slide bar (84), a second reset spring (85), and a blocking plate (86). The fixing plate (81) is located inside the square shell (51). The annular magnet (82) is fixedly installed on the outside of the fixing plate (81) and fixedly connected to the inner wall of the square shell (51). The third clearance groove (83) is opened on the top left side of the square shell (51). The L-shaped slide rod (84) is slidably installed inside the third clearance groove (83) and fixedly connected to the first sliding ring (67). One end of the second reset spring (85) is fixedly connected to the inner wall of the third clearance groove (83) and the other end is fixedly connected to the L-shaped slide rod (84). The blocking plate (86) is fixedly installed at the top of the L-shaped slide rod (84) and slidably installed at the top of the square shell (51).

2. The water-saving method for horizontal lines on the surface of printed circuit boards according to claim 1, characterized in that, The water-saving method applicable to the horizontal line of printed circuit board surface treatment specifically includes the following steps: S1. After the drive motor (2) starts, it drives the drive shaft (3) to rotate. When the drive shaft (3) rotates, it drives the adjacent reciprocating screw (61) to rotate. When the reciprocating screw (61) rotates, it drives another reciprocating screw (61) to rotate. During the rotation of the reciprocating screw (61), it drives the piston plate (53) which is restricted by the first limiting groove (54) and the first limiting slider (55) to move continuously to the left. S2. During the leftward movement of the piston plate (53), the water storage chamber formed by the piston plate (53), the sealing plate (71) and the square shell (51) gradually becomes larger, and the air pressure gradually decreases. When the piston plate (53) moves a distance to the first threshold, the water inlet channel (52) connects with the water storage chamber. At this time, the deionized water in the first water tank quickly passes through the water inlet channel (52) and enters the water storage chamber under the action of negative pressure. S3. When the piston plate (53) moves a distance to the second threshold, the piston plate (53) contacts the first sliding ring (67). Subsequently, as the piston plate (53) continues to move to the left, the piston plate (53) pushes the first sliding ring (67) to move to the left in sync. When the first sliding ring (67) moves to the left, it drives the second sliding ring (68) to move in sync through the I-shaped slide rod (66). At the same time, the first sliding ring (67) drives the blocking plate (86) to block the water inlet channel (52) through the L-shaped slide rod (84). When the L-shaped slide rod (84) moves to the left, it compresses the second reset spring (85). S4. When the piston plate (53) moves to the third threshold, the piston plate (53) moves to the leftmost end of the reciprocating thread on the outside of the square shell (51). At this time, the first sliding ring (67) is in contact with the fixed plate (81), and the blocking plate (86) completes the sealing of the water inlet channel (52). At this time, the fixed plate (81) adsorbs and fixes the first sliding ring (67). Subsequently, as the reciprocating screw (61) continues to rotate, the piston plate (53) continues to move to the right along the reciprocating screw (61). S5. During the rightward movement of the piston plate (53), the deionized water inside the water storage chamber is continuously pushed, and the pressure inside the water storage chamber gradually increases. As the piston plate (53) moves to the right, the sealing plate (71) moves to the right under the water flow pressure and compresses the first reset spring (72). S6. When the piston plate (53) moves a distance to the fourth threshold, the piston plate (53) that moves to the right releases the blockage of the water inlet (64). At this time, the deionized water inside the water storage chamber continuously enters the reciprocating screw (61) through the water inlet (64) and then enters the second water tank through the water outlet (65). When the deionized water is output through the water inlet (64), the reciprocating screw (61) drives the water inlet (64) to rotate continuously, thereby causing the deionized water to be rotated and output. S7. When the piston plate (53) moves to the fifth threshold, the piston plate (53) moves to the right side of the water inlet channel (52) and simultaneously comes into contact with the second sliding ring (68). Subsequently, as the piston plate (53) continues to move, the piston plate (53) drives the first sliding ring (67) to move to the right through the second sliding ring (68) and the I-shaped slide rod (66). After the first sliding ring (67) moves to the right, it is no longer attracted by the fixed plate (81). At this time, the compressed second reset spring (85) pushes the L-shaped slide rod (84) to drive the blocking plate (86) to reset, thereby releasing the blockage of the water inlet channel (52). S8. When the piston plate (53) moves a distance to the sixth threshold, the piston plate (53) reaches the rightmost end of the reciprocating thread on the outside of the reciprocating screw (61). As the reciprocating screw (61) continues to rotate, the piston plate (53) moves to the left again to draw deionized water. After the water supply component inside the first water tank inputs deionized water into the second water tank, the water supply component inside the second water tank simultaneously inputs deionized water into the third water tank. S9. After being treated in the chemical tank, the PCB is driven by the suspension equipment to pass through the third water tank, the second water tank and the first water tank in succession. The deionized water in the third water tank removes the residual chemical solution from the PCB surface. The used deionized water is continuously output through the drainage pipe at the bottom of the third water tank. The deionized water in the second water tank exchanges ions for impurities on the board surface and in the holes. The deionized water in the first water tank thoroughly cleans the board surface and in the holes.

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