Automatic piston salt core flushing device and flushing method

Abstract

The application discloses a piston salt core automatic flushing device and a flushing method, relates to the technical field of casting post-processing equipment, and the flushing device comprises a rack, a water tank and a softened water tank are arranged in the rack, a horizontal moving frame is slidably connected to the rack and can reciprocate along the horizontal direction, a Z-axis sliding table is slidably connected to the horizontal moving frame and can reciprocate along the vertical direction, a tray is slidably connected to the Z-axis sliding table, a plurality of nozzles are fixed to the Z-axis sliding table and correspond to the inner cooling channel openings of the piston respectively, the nozzles are connected with a plurality of flushing medium pipelines and can output clean water, softened water and compressed air at different times, the horizontal moving frame drives the Z-axis sliding table, the nozzles and the piston to reciprocate between the water tank and the softened water tank, the Z-axis sliding table drives the nozzles and the piston to move up and down so that the nozzles and the piston are above or in the tank body, the double-tank partition multi-stage cleaning, automatic cross-station circulation and same nozzle time-sharing switching of multiple media are realized, and the cleanliness and production efficiency of the piston salt core flushing are improved.

Description

Technical Field

[0001] This invention relates to the field of casting post-processing equipment technology, specifically to an automatic piston salt core rinsing device and rinsing method. Background Technology

[0002] To effectively reduce the temperature of the piston head, engine pistons typically have internal cooling channels to accommodate the increased power density of the engine. The formation of the internal cooling channels in cast aluminum alloy pistons involves first casting a salt core into the piston blank. After casting, the salt core inside the piston blank needs to be rinsed and dissolved using high-pressure water to form the internal cooling channels. The salt core must be thoroughly rinsed; otherwise, it will affect subsequent processing and the surface quality of the product.

[0003] Existing piston salt core rinsing equipment, such as the rinsing devices disclosed in documents CN113333365B and CN116944104A, all adopt a single cleaning tank or a single water tank structure, with the piston completing the rinsing operation within the same tank. This type of structure has certain drawbacks:

[0004] (1) The existing rinsing equipment is unable to complete the multi-stage cleaning process in sections, resulting in poor rinsing cleanliness. The existing rinsing equipment is only equipped with a single rinsing chamber or a single collection tank, and can only pass a single water flow to complete a simple rinsing. It cannot complete the multi-stage operation of salt core dissolution, softened water rinsing, and clean water soaking in sections. The high-salt wastewater after salt core dissolution continues to accumulate in the same chamber, and the salt concentration of the water continues to increase. During the later rinsing, the salt stains are very easy to adhere to the inner wall of the piston cooling channel, which is difficult to remove effectively. At the same time, the lack of an independent soaking station means that the salt core debris cannot be fully dissolved, which can easily cause local blockage of the channel.

[0005] (2) The structure is fixed and cannot achieve fully automatic cross-station transfer, resulting in low production efficiency. The piston clamping mechanism and flushing nozzle of the existing equipment are fixedly installed in the cavity. There is no structure for horizontal movement to switch stations. The workpiece flushing, rinsing and transfer processes require manual loading and unloading and manual transfer of pistons, which cannot be adapted to continuous production of automated production lines. Moreover, the nozzle height cannot be raised or lowered as a whole. It can only rely on the small extension and retraction of the pressure head to press the piston. It cannot completely immerse the piston in the water body. It can only achieve liquid surface spraying and rinsing, resulting in low salt core dissolution efficiency.

[0006] (3) The nozzle has only a single fluid passage and cannot switch between multiple media at different times, resulting in a fragmented process. Traditional rinsing nozzles only have a single water path interface, which can only pass in clean water or brine. There are no multiple independent media interfaces, and it is impossible for the same nozzle to output brine, softened water, and compressed air at different times. If the entire process of rinsing, washing, and drying is to be completed, multiple independent machines are required to process in steps, and the piston is rotated multiple times, which increases the risk of damage and scrap. The overall equipment occupies a large area and the process is complicated.

[0007] Therefore, how to provide an automatic piston salt core rinsing device that can achieve dual-tank zoned multi-stage rinsing, automatic cross-station flow, and time-sharing switching of multiple media with the same nozzle is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] In view of this, the present invention provides an automatic flushing device for piston salt cores, which aims to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: An automatic piston salt core flushing device includes: A frame, the inside of which is equipped with a water tank and a softened water tank; A horizontally movable frame, which is slidably connected to the frame and is capable of reciprocating in the horizontal direction; The Z-axis slide is slidably connected to the horizontal moving frame and can reciprocate in the vertical direction. A tray, slidably connected to the Z-axis slide, is used to support multiple pistons; Multiple nozzles are fixed on the Z-axis slide and correspond to the internal cooling channel opening of the piston. Multiple flushing medium pipelines are connected to the nozzles, and different media are output in time to realize multi-stage flushing of the internal cooling channel of the piston. The horizontal moving frame can drive the Z-axis slide, the nozzle and the piston to switch back and forth between the water tank and the softened water tank. The Z-axis slide can drive the nozzle and the piston to move up and down, so that the nozzle and the piston are above or inside the water tank or the softened water tank.

[0010] Through the above technical solution, this invention discloses an automatic piston salt core rinsing device. The independent setting of the water tank and the softened water tank spatially separates the two core process steps of clean water rinsing and softened water rinsing, avoiding the continuous increase in salinity caused by the mixing of high-salt wastewater and rinsing water, and providing independent physical workstations for multi-stage cleaning. The horizontal reciprocating movement of the horizontal moving frame realizes the automatic transfer of the piston and nozzle assembly between the two tanks. The vertical reciprocating movement of the Z-axis slide table realizes the overall lifting and lowering of the nozzle and piston, allowing them to enter the tank for immersion rinsing and soaking. The tray enables batch carrying and multi-station transfer. It can simultaneously flush multiple pistons; the precise alignment of the nozzle and the internal cooling channel of the piston ensures that the flushing medium acts directly on the salt core; multiple flushing medium pipelines allow the same nozzle to output three media: clean water, softened water, and compressed air, respectively, so that multiple processes can be completed at the same station without changing equipment or transferring pistons; the horizontal moving frame and the Z-axis slide form a horizontal transfer and vertical immersion dual-axis linkage mechanism, which covers the flushing requirements of the piston position for multi-stage flushing processes, effectively solving the technical problems of existing technologies such as single tank structure not being able to clean in sections, fixed structure not being able to move across stations, and nozzle single path not being able to switch between multiple media.

[0011] Preferably, in the above-mentioned automatic piston salt core flushing device, a horizontal moving guide rail mounting plate is fixed on the frame. The horizontal moving frame includes a horizontal moving guide rail and a horizontal moving frame upright plate. The horizontal moving guide rail is fixed on the horizontal moving guide rail mounting plate, and the bottom of the horizontal moving frame upright plate is slidably connected to the horizontal moving guide rail via a horizontal moving slider. The horizontal moving guide rail mounting plate provides a stable mounting base for the horizontal moving guide rail, ensuring that the horizontal moving frame maintains positional accuracy during frequent reciprocating motion. The horizontal moving guide rail provides high-precision horizontal guidance, ensuring that the horizontal moving frame moves in a straight line and ensuring the alignment accuracy of the nozzle with the piston's internal cooling channel opening.

[0012] Preferably, in the above-mentioned automatic piston salt core rinsing device, the Z-axis slide includes a Z-axis guide rail and a Z-axis slide plate. The Z-axis guide rail is vertically fixed to the horizontally movable frame plate, and the Z-axis slide plate is slidably connected to the Z-axis guide rail. A Z-axis horizontal base plate is fixed on the Z-axis slide plate, and the nozzles are mounted on the Z-axis horizontal base plate. The Z-axis guide rail provides high-precision vertical guidance, ensuring that the Z-axis slide rises and falls in a straight line, and ensuring the stability of the piston's posture when entering the tank. The sliding cooperation between the Z-axis slide plate and the guide rail ensures the smoothness and positional accuracy of the lifting and lowering movement. The Z-axis horizontal base plate provides a uniform mounting plane for multiple nozzles, ensuring the relative positional accuracy between each nozzle. All nozzles rise and fall synchronously with the Z-axis slide, ensuring that multiple pistons enter or leave the tank simultaneously, and ensuring the consistency of batch rinsing.

[0013] Preferably, in the above-mentioned automatic piston salt core rinsing device, a tray guide rail is fixed on the Z-axis slide, and the tray is slidably connected to the tray guide rail. The tray guide rail provides a guiding foundation for the independent lifting and lowering of the tray, forming a two-stage lifting coordination with the main lifting motion of the Z-axis slide; the tray can be independently lifted and lowered relative to the Z-axis horizontal base plate, carrying the piston to rise to the nozzle docking position, or lowering to realize loading and unloading operations.

[0014] Preferably, the above-mentioned automatic piston salt core rinsing device further includes a pressure frame device, which includes a pressure frame guide rail, a pressure frame slide, and a pressure frame horizontal plate. The pressure frame guide rail is fixed to the Z-axis slide, and the pressure frame slide is slidably connected to the pressure frame guide rail and can move up and down along the pressure frame guide rail. The pressure frame horizontal plate is fixed to the pressure frame slide, and a left pressure block and a right pressure block for pressing or releasing the piston are installed at the bottom of the pressure frame horizontal plate. The pressure frame guide rail provides a stable installation foundation and lifting guide for the pressure frame device; the sliding cooperation between the pressure frame slide and the guide rail realizes the smooth lifting and lowering movement of the entire pressure frame device; the pressure frame horizontal plate provides a uniform installation plane for the left and right pressure blocks; the left and right pressure blocks press the top of the piston from above, forming an upper and lower clamp with the tray to prevent the piston from shifting or falling off due to water flow impact during high-pressure rinsing; the overall lifting and lowering of the pressure frame device along the pressure frame guide rail realizes the automated control of the pressing and releasing actions, eliminating the need for manual locking and adapting to the production line rhythm.

[0015] Preferably, in the above-mentioned automatic flushing device for piston salt cores, a left pressure block adjusting handwheel and a right pressure block adjusting handwheel are installed at both ends of the horizontal plate of the pressure frame. A left pressure block driving screw and a right pressure block driving screw are coaxially connected to the left pressure block adjusting handwheel and the right pressure block adjusting handwheel, respectively. A left pressure block fixing base plate and a right pressure block fixing base plate are threaded to the outer sides of the left pressure block driving screw and the right pressure block driving screw, respectively. The left pressure block fixing base plate is slidably connected to the bottom wall of the horizontal plate of the pressure frame. The right pressure block fixing base plate is slidably connected to the bottom wall of the left pressure block fixing base plate. The left pressure block and the right pressure block are respectively fixed to the bottom walls of the left pressure block fixing base plate and the right pressure block fixing base plate. The adjusting handwheel provides a manual adjustment interface, making operation intuitive and convenient. The drive screw converts the rotational motion of the handwheel into the linear movement of the fixed base plate. The fixed base plate is slidably connected to the bottom wall of the horizontal plate of the pressure frame, ensuring its free sliding and stable support in the horizontal direction. The left and right pressure blocks move synchronously with the fixed base plate. Rotating the adjusting handwheel drives the fixed base plate to move the pressure blocks in opposite directions or in the horizontal direction, realizing stepless adjustment of the distance between the left and right pressure blocks. This allows the same pressure frame device to adapt to pistons of different diameters and sizes, enabling multi-variety mixed-line production without changing fixtures, significantly reducing changeover time, and solving the technical problem of poor fixture adaptability mentioned in the background technology.

[0016] Preferably, in the above-mentioned automatic flushing device for piston salt cores, the multi-channel flushing medium pipeline includes a clean water pipeline, a softened water pipeline, and a compressed air pipeline; The water tank is connected to the inlet of the water pump, and the outlet of the water pump is connected to the nozzle through the clean water pipeline. A clean water valve is installed on the clean water pipeline. The softened water tank is connected to the inlet of the softened water pump, and the outlet of the softened water pump is connected to the nozzle through the softened water pipeline. A softened water valve is installed on the softened water pipeline. The compressed air source is connected to the nozzle through the compressed air pipeline, and a high-pressure air valve is installed on the compressed air pipeline. Three independent media channels provide non-interfering supply channels for clean water, softened water, and compressed air, respectively. The media pipelines converge into the same flow channel at the inlet end of the nozzle and are ejected from the working end of the nozzle. The water pump and softened water pump provide the high-pressure power required for rinsing clean water and softened water, respectively. The clean water valve, softened water valve, and high-pressure air valve independently control the on / off and switching of each media pipeline. The same nozzle can output different media at different times according to process needs. During the clean water rinsing stage, high-pressure clean water is output to break up and flush away the salt core. During the rinsing stage, it switches to high-pressure softened water to replace the residual salt solution. During the purging stage, it switches to compressed air to dry the channel.

[0017] Preferably, in the above-mentioned automatic piston salt core rinsing device, a liquid level sensor and a salinity sensor are respectively installed in the water tank and the softened water tank. The liquid level sensor monitors the liquid level in each tank in real time to prevent the rinsing effect from being affected by excessively low liquid levels due to water evaporation or medium consumption; the salinity sensor monitors the salt concentration in each tank in real time, and when the salinity reaches the set upper limit, it automatically discharges high-salt wastewater and replenishes fresh liquid through linkage control with the drain control valve and the inlet control valve, maintaining the salinity in the tank within the allowable range of the process.

[0018] Preferably, in the above-mentioned automatic piston salt core rinsing device, a flow sensor is installed in the connecting pipe of each nozzle. The instantaneous flow rate of each nozzle is monitored independently, realizing single-piece quality traceability; when the instantaneous flow rate of a certain nozzle is lower than the preset value of the corresponding model piston, the control system can promptly determine whether the internal cooling channel of the piston is fully open or whether the nozzle is blocked, and issue an alarm signal to mark the corresponding piston, preventing defective products from flowing into the next process and improving the level of precision in quality control.

[0019] The present invention also provides an automatic flushing method for piston salt cores, using the above-mentioned automatic flushing device for piston salt cores, comprising the following steps: S1: Position the piston in the appropriate position so that the nozzle is aligned with the internal cooling channel opening of the piston. Control the horizontal moving frame to move the piston above the water tank. Lower the piston into the water tank via the Z-axis slide table. Inject high-pressure clean water into the nozzle to flush the internal cooling channel of the piston. S2: After rinsing, control the Z-axis slide to rise so that the piston is removed from the water tank, and move the piston above the softened water tank through the horizontal moving frame. The Z-axis slide descends so that the piston enters the softened water tank, and high-pressure softened water is introduced into the nozzle to rinse the internal cooling channel of the piston. S3: After rinsing, control the Z-axis slide to continue descending so that the piston is immersed below the liquid surface of the softened water tank for soaking; S4: After soaking, control the Z-axis slide to rise so that the piston moves above the liquid surface of the softened water tank, and introduce compressed air into the nozzle to purge the internal cooling channel of the piston.

[0020] S5: After purging is completed, control the Z-axis slide to rise, so that the piston moves out of the softening water tank and moves horizontally to the standby position above the water tank, and issues a work completion alarm; remove the rinsed piston, install a new piston to be rinsed, and repeat the cycle.

[0021] High-pressure water rinsing uses the impact force of high-pressure water to break up and flush out the solid salt core, completing the removal of the main body of the salt core; high-pressure softened water rinsing displaces the residual high-salt solution from the internal cooling channel, significantly reducing the salt concentration in the channel and preventing salt residue precipitation during subsequent drying; static soaking completely immerses the piston in softened water, using osmosis and diffusion to fully dissolve the trace amounts of salt remaining in the dead corners and micropores of the channel, solving the problem that simple rinsing cannot eliminate dead corner residues; high-pressure compressed air purging blows out all residual liquid and loose debris in the channel, while quickly drying the internal cooling channel to prevent liquid residues from corroding the piston base; the entire rinsing process is automatically connected, requiring no manual transfer, realizing a complete closed-loop cleaning process from water rinsing to softened water rinsing, static soaking, and compressed air purging, effectively solving the technical problems of existing technologies such as the inability of a single tank to perform multi-level cleaning in different zones, the inability of a fixed structure to be fully automated across workstations, and the inability of a single nozzle to switch between multiple media at different times, thus improving both rinsing cleanliness and production efficiency.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an automatic piston salt core flushing device, which has the following beneficial effects: 1. The present invention has a water tank and a softened water tank installed inside the frame. The horizontal moving frame drives the Z-axis slide, nozzle, and piston to switch back and forth between the water tank and the softened water tank. The Z-axis slide drives the nozzle and piston to move up and down, positioning them above or inside the tank. The nozzle is connected to multiple flushing medium pipelines, which can output clean water, softened water, and compressed air respectively. Based on the above structure, the present invention realizes the complete integration of a multi-stage automated cleaning process of clean water rinsing, softened water rinsing, static soaking, and compressed air purging on the same equipment. This effectively solves the problem of salt residue caused by the continuous accumulation of high-salt wastewater in traditional single-tank equipment. At the same time, the dual-axis linkage mechanism formed by the horizontal moving frame and the Z-axis slide enables fully automated cross-station transfer without the need for manual handling.

[0023] 2. This invention achieves rapid compatibility and stable clamping of pistons of different sizes through the lifting and pressing of the clamping device and the adjustment of the distance between the left and right clamping blocks. It can be adapted to multi-product mixed production lines without changing the fixtures. By installing level sensors and salinity sensors in the water tank and softened water tank respectively, the liquid level and salinity in the tank can be monitored in real time. When the salinity reaches the set value, the water is automatically drained and replenished with new liquid to maintain the salinity in the tank within the allowable range of the process. By installing flow sensors in the connecting pipes of each nozzle, independent monitoring of the flushing flow of each piston and traceability of individual piece quality are achieved. When the flow rate is lower than the preset value, an alarm is triggered and a mark is made in time, effectively preventing unqualified products from flowing into the next process.

[0024] 3. This invention integrates a fully automated rinsing process consisting of high-pressure water rinsing, high-pressure softened water rinsing, static soaking, and compressed air purging. Water rinsing utilizes the impact force of high-pressure water to quickly flush out solid salt cores. Softened water rinsing replaces residual high-salt solution to prevent salt residue from precipitating out after drying. Static soaking uses osmosis and diffusion to remove trace amounts of salt from dead corners of the channel. Compressed air purging blows out all residual liquid and debris and quickly dries the channel. The four processes are automatically connected without manual transfer, effectively improving rinsing cleanliness and production efficiency while reducing equipment footprint. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is an isometric view of the piston salt core automatic flushing device provided by the present invention with the piston installed. Figure 2 The attached figure is a schematic diagram of the piston with an internal cooling channel provided by the present invention; Figure 3 The attached figure is an isometric view of the piston salt core automatic flushing device provided by the present invention in the state of the presser frame moving down to press the piston; Figure 4 The attached figure is an isometric view of the piston salt core automatic flushing device provided by the present invention with the piston pressed against the pressure frame in a downward movement from another angle. Figure 5 The attached figure is a schematic diagram of the structure of the pressure frame device provided by the present invention; Figure 6 The attached figure is a schematic diagram of the pressure frame device provided by the present invention from another angle; Figure 7 The attached figure is a cross-sectional view of the piston salt core automatic rinsing device provided by the present invention in the water tank rinsing state; Figure 8 The attached figure is a schematic cross-sectional view of the piston salt core automatic rinsing device provided by the present invention in the rinsing state of the softened water tank. Figure 9 The attached figure is a schematic cross-sectional view of the piston salt core automatic rinsing device provided by the present invention in a softened water tank immersion state. Figure 10 The attached figure is a schematic diagram of the rear isometric view of the automatic flushing device for piston salt cores provided by the present invention.

[0027] Wherein: 1-Frame; 101-Horizontal movement drive motor; 102-Main drive shaft; 103-Drive pulley; 104-Horizontal movement guide rail mounting plate; 105-Belt; 106-Driven pulley; 2-Tray device; 201-Tray drive motor; 202-Tray lead screw; 203-Tray guide rail; 204-Tray; 3-Piston; 301-Piston internal cooling channel opening; 4-Pressure frame device; 401-Pressure frame slide; 402-Pressure frame stiffener; 403-Pressure frame horizontal plate; 404-Left pressure block; 405-Right pressure block; 406-Left pressure block fixing base plate; 407-Right pressure block fixing base plate; 408-Right pressure block nut seat; 409-Right pressure block drive screw; 410-Right pressure block adjusting handwheel; 411-Left pressure block adjusting handwheel; 412-Left pressure block nut seat; 413-Pressure frame screw; 414-Pressure frame guide rail; 415-Pressure frame motor; 41 6-Left pressure block drive screw; 5-Z-axis slide; 501-Z-axis slide plate; 502-Z-axis guide rail; 503-Z-axis drive motor; 504-Z-axis stiffener; 505-Z-axis horizontal base plate; 506-Nozzle; 6-Horizontal moving frame; 601-Horizontal moving frame upright plate; 602-Horizontal moving frame stiffener; 603-Horizontal moving guide rail; 604-Horizontal moving slider; 605-Horizontal moving slide plate; 7-Nozzle control valve Mounting bracket; 701-Clear water valve; 702-Softened water valve; 703-High-pressure air valve; 704-Manifold; 705-Distributor; 706-Flow sensor; 8-Softened water tank; 9-Water tank; 10-Level sensor; 11-Salinity sensor; 12-Water pump; 13-Softened water pump; 14-Clear water drain control valve; 15-Clear water inlet control valve; 16-Softened water drain control valve; 17-Softened water inlet control valve. Detailed Implementation

[0028] 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.

[0029] See Figure 1 , Figure 2 , Figure 3As shown, this invention discloses an automatic piston salt core rinsing device, comprising a frame 1. A horizontally movable guide rail mounting plate 104 is fixedly installed on the top of the frame 1. A water tank 9 and a softened water tank 8 are arranged side-by-side at the bottom of the inner cavity of the frame 1, completely isolated by a stainless steel partition, ensuring independent operation and preventing liquid cross-contamination. The frame 1 is constructed from industrial aluminum profiles, bolted together, providing high rigidity and load-bearing capacity, effectively resisting vibration and impact during operation. Both the water tank 9 and the softened water tank 8 are welded from 304 stainless steel plates, exhibiting excellent resistance to high-salt liquid corrosion. The water tank 9 stores high-pressure clean water for rinsing, while the softened water tank 8 stores softened water for rinsing and soaking.

[0030] This device also includes a complete control system, which is a PLC programmable logic controller or an industrial computer. The control system is electrically connected to the horizontal movement drive motor 101, the Z-axis drive motor 503, the tray drive motor 201, the press frame motor 415, the water pump 12, the softened water pump 13, the clean water valve 701, the softened water valve 702, the high-pressure air valve 703, the liquid level sensor 10, the salinity sensor 11, and the flow sensor 706. The control system automatically controls the action sequence of each motor, pump, and valve according to the preset process program and the feedback signals of each sensor, so as to realize the fully automated operation of the piston salt core rinsing process.

[0031] See Figure 3 As shown, two high-precision linear guide rails 603 are fixedly mounted parallel to each other in the horizontal direction on the horizontal moving guide rail mounting plate 104. The two guide rails are arranged symmetrically to ensure the stability of horizontal movement. A horizontal moving slider 604 is slidably connected to the horizontal moving guide rail 603. A horizontal moving frame upright plate 601 is fixedly connected to the top of the horizontal moving slider 604. Horizontal moving frame stiffening plates are fixed on both sides of the horizontal moving frame upright plate 601.

[0032] A horizontal moving drive motor 101 is installed at one end of the frame 1. The output end of the horizontal moving drive motor 101 is connected to the main drive shaft 102. A drive pulley 103 is fixed on the main drive shaft 102. A driven pulley 106 is rotatably connected to the other end of the frame 1. A transmission belt 105 is fitted between the drive pulley 103 and the driven pulley 106. The horizontal moving frame upright plate 601 is fixedly connected to the belt 105. During operation, the horizontal moving drive motor 101 drives the entire horizontal moving frame 6 to slide back and forth along the horizontal moving guide rail 603 through belt transmission, realizing the automatic switching of the load component between the water tank 9, the softening water tank 8, and the loading and unloading station. There is no need for manual transfer of workpieces, which effectively solves the problems of traditional single-tank equipment being unable to perform multi-level cleaning in different zones and the low efficiency of manual transfer.

[0033] See Figure 3As shown, two parallel Z-axis guide rails 502 are fixedly installed on the side wall of the horizontal moving frame plate 601 along the vertical direction. A Z-axis slide plate 501 is slidably connected to the Z-axis guide rails 502. The Z-axis slide plate 501 can move vertically up and down along the guide rails. Its lifting stroke is set according to the depth of the water tank 9 and the softened water tank 8 to ensure that the piston 3 can be completely immersed below the liquid surface of the tank. A Z-axis horizontal base plate 505 is fixedly connected to the bottom of the Z-axis slide plate 501. Multiple sets of nozzles 506 are fixedly installed side by side on the Z-axis horizontal base plate 505. The number of nozzles 506 can be set to 6 to 8 according to the production line cycle. Each nozzle 506 has three independent media pipelines connected to its inlet (a clean water pipeline, a softened water pipeline, and a compressed air pipeline). These three media pipelines converge at the inlet of the nozzle 506 into the same flow channel and are then ejected from the working end of the nozzle 506. Each media pipeline is equipped with a clean water valve 701, a softened water valve 702, and a high-pressure air valve 703. The three media can be switched between time periods by opening the corresponding valves. The working end of the nozzle 506 is used to connect to the internal cooling channel port 301 of the piston 3. A sealing ring is built into the top of the nozzle 506 to ensure that the high-pressure media does not leak during rinsing. The three media pipelines are independent of each other and can output different media at different times, allowing multiple processes to be completed without changing tooling.

[0034] A tray guide rail 203 is fixedly mounted vertically on the Z-axis slide 501, and a tray 204 is slidably mounted on the tray guide rail 203. A tray drive motor 201 is fixedly mounted on the Z-axis slide 501, and the output end of the tray drive motor 201 is connected to a tray lead screw 202. The tray lead screw 202 and the lead screw nut built into the tray 204 form a lead screw pair transmission. A piston positioning groove is formed on the upper surface of the tray 204 to achieve the initial positioning of the piston 3 and ensure that each piston 3 and the corresponding nozzle 506 are aligned in the horizontal direction.

[0035] See Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a pressure frame guide rail 414 is fixedly installed on the Z-axis slide plate 501, and the pressure frame device 4 is slidably assembled on the pressure frame guide rail 414. The pressure frame device 4 includes a pressure frame slide plate 401, a pressure frame stiffener plate 402, a pressure frame horizontal plate 403, a left pressure block 404, a right pressure block 405, a left pressure block fixing base plate 406, a right pressure block fixing base plate 407, a lead screw bearing seat 408, a right pressure block drive lead screw 409, a right pressure block adjusting handwheel 410, a left pressure block adjusting handwheel 411, a nut seat 412, a pressure frame lead screw 413, a pressure frame guide rail 414, a pressure frame motor 415, and a left pressure block drive lead screw 416.

[0036] The pressure frame motor 415 is fixedly installed on the upper end of the Z-axis slide 501. The output end of the pressure frame motor 415 is connected to the pressure frame screw 413. The pressure frame screw 413 is in transmission cooperation with the pressure frame slide 401. The forward and reverse rotation of the pressure frame motor 415 can drive the pressure frame slide 401 to rise and fall along the pressure frame guide rail 414 as a whole, and synchronously drive the entire set of pressing components to press down the clamping piston or lift up the releasing piston.

[0037] The lower end of the pressure frame slide 401 is rigidly connected to the pressure frame horizontal plate 403. Triangular pressure frame stiffeners 402 are symmetrically arranged on both sides between the pressure frame slide 401 and the pressure frame horizontal plate 403. The two ends of the pressure frame stiffeners 402 are bolted to the pressure frame slide 401 and the pressure frame horizontal plate 403 respectively, which improves the overall structural rigidity and buffers the water flow impact vibration caused by high pressure flushing.

[0038] The bottom wall of the horizontal plate 403 of the pressure frame is arranged in a horizontal parallel manner with a left pressure block drive screw 416 and a right pressure block drive screw 409 on the right side. Both ends of the left pressure block drive screw 416 and the right pressure block drive screw 409 are rotatably supported on the lower side of the horizontal plate 403 of the pressure frame through screw bearing seats 408. The screw bearing seats 408 restrict the axial displacement of the screw and only allow the screw to rotate circumferentially.

[0039] The left and right pressure block adjusting handwheels 411 and 410 are respectively installed at the left and right ends of the horizontal plate 403 of the pressure frame. The left pressure block adjusting handwheel 411 is coaxially fixed with the left end of the left pressure block drive screw 416, and the right pressure block adjusting handwheel 410 is coaxially fixed with the right end of the right pressure block drive screw 409. Rotating the adjusting handwheel will drive the corresponding drive screw to rotate synchronously.

[0040] The top wall of the left pressure block fixing base plate 406 slides against the bottom wall of the horizontal plate 403 of the pressure frame; the top wall of the right pressure block fixing base plate 407 slides against the bottom wall of the left pressure block fixing base plate 406, and the two are arranged in an overlapping manner. A nut seat 412 is fixed on the left pressure block fixing base plate 406, and the nut seat 412 is threadedly engaged with the left pressure block drive screw 416; a nut seat 412 is fixed on the right pressure block fixing base plate 407, and the nut seat 412 is threadedly engaged with the right pressure block drive screw 409. Multiple sets of left pressure blocks 404 are fixedly installed below the left pressure block fixing base plate 406, and multiple sets of right pressure blocks 405 are fixedly installed below the right pressure block fixing base plate 407; each set of left pressure blocks 404 and right pressure blocks 405 corresponds to a single piston 3. The left and right pressure blocks are made of polyurethane elastic material, and the bottom surface has an arc-shaped groove that matches the top of the piston, which plays a role in buffering and anti-slip when clamping. The operator can rotate the left pressure block adjusting handwheel 411 and the right pressure block adjusting handwheel 410 respectively, which will drive the corresponding fixed base plate to move horizontally through the left pressure block drive screw 416 and the right pressure block drive screw 409. The left pressure block fixed base plate 406 and the right pressure block fixed base plate 407, which are stacked on top of each other, slide without interfering with each other, and can steplessly adjust the clamping width of the pair of pressure blocks to adapt to pistons with different outer diameter specifications. After the pressure frame device 4 is lowered as a whole, the left pressure block 404 and the right pressure block 405 form a bidirectional clamp with the lower tray 204, which restrains the piston 3 from shifting during high-pressure flushing and ensures that the nozzle 506 and the piston internal cooling channel port 301 are continuously sealed and connected.

[0041] See Figure 10 As shown, the specific connection method of the clean water rinsing circuit is as follows: the bottom outlet of the water tank 9 is connected to the inlet of the water pump 12 through a pipeline, and the outlet of the water pump 12 is connected to the nozzle 506 through a clean water pipeline. A clean water valve 701 is installed on the clean water pipeline. The water pump 12 is a high-pressure centrifugal pump with an output pressure of 0.6 to 0.8 MPa, which can pressurize the clean water in the water tank 9 to the set pressure and then deliver it to the nozzle 506. The clean water valve 701 is an electrically controlled solenoid valve, used to independently control the on / off state of the clean water circuit. The water tank 9 is also equipped with a clean water inlet control valve 15 and a clean water outlet control valve 14. The clean water inlet control valve 15 is used to replenish the water tank 9 with new clean water, and the clean water outlet control valve 14 is used to discharge high-salt wastewater out of the tank.

[0042] The specific connection method of the softened water rinsing circuit is as follows: the bottom outlet of the softened water tank 8 is connected to the inlet of the softened water pump 13 through a pipeline, and the outlet of the softened water pump 13 is connected to the nozzle 506 through a softened water pipeline. A softened water valve 702 is installed on the softened water pipeline. The softened water pump 13 is also a high-pressure centrifugal pump with a rinsing pressure of 0.5 MPa. The softened water valve 702 is an electrically controlled solenoid valve used to independently control the on / off state of the softened water circuit. The softened water tank 8 is equipped with a softened water inlet control valve 17 and a softened water outlet control valve 16, which are used to add new softened water and discharge high-salt wastewater, respectively.

[0043] The specific connection method of the compressed air purging circuit is as follows: an external high-pressure air source is connected to nozzle 506 through a compressed air pipeline. A high-pressure air valve 703 is installed on the compressed air pipeline, with a purging air pressure of 0.7 MPa, used to dry the residual liquid and debris in the channel. The high-pressure air valve 703 is an electrically controlled solenoid valve, used to independently control the on / off state of the compressed air circuit.

[0044] The three media pipelines mentioned above are completely independent and do not interfere with each other. The same nozzle can switch between the three media at different times, which also effectively reduces the overall footprint of the equipment.

[0045] See Figure 8 , Figure 9 and Figure 10 As shown, a level sensor 10 and a salinity sensor 11 are fixedly installed on the inner walls of the water tank 9 and the softened water tank 8, respectively. The level sensor 10 is a float-type or capacitive level sensor, with its sensing end extending into the liquid in the tank, used to collect the liquid level height in the tank in real time and transmit the liquid level signal to the overall control system. The salinity sensor 11 is a conductivity-type salinity sensor, with its sensing end immersed in the liquid in the tank, used to monitor the salt concentration of the liquid in real time and transmit the salinity signal to the control system.

[0046] Each nozzle 506 has an independent flow sensor 706 connected in series in its front-end pipeline. The flow sensor 706 is a turbine-type or electromagnetic flow sensor used to collect the instantaneous flushing flow of a single channel in real time. When the flow rate of a single channel is lower than a preset threshold, the control system immediately determines that the internal cooling channel of the corresponding piston 3 is blocked or the nozzle 506 is blocked, automatically issues an alarm signal and marks the unqualified workpiece on the human-machine interface, realizing single-piece quality traceability.

[0047] The present invention also provides an automatic flushing method for piston salt cores, as detailed below: The equipment is initially in standby mode: the pressure frame device 4 is in the raised and released state, the pressure frame slide 401 is located at the upper end of the pressure frame guide rail 414, and the left pressure block 404 and right pressure block 405 are disengaged from the piston 3. The tray 204 is lowered to the loading and unloading low position, located at the lower end of the tray guide rail 203, with sufficient space for picking up and placing between it and the nozzle 506.

[0048] When using a piston 3 for the first time or replacing it with one of different outer diameters, the clamping distance between the left and right pressure blocks needs to be adjusted beforehand. The operator rotates the left pressure block adjusting handwheel 411 and the right pressure block adjusting handwheel 410 respectively. The left pressure block adjusting handwheel 411 drives the left pressure block drive screw 416 to rotate, causing the left pressure block fixing base plate 406 to slide horizontally along the bottom wall of the pressure frame horizontal plate 403. The right pressure block adjusting handwheel 410 drives the right pressure block drive screw 409 to rotate, causing the right pressure block fixing base plate 407 to slide horizontally along the bottom wall of the left pressure block fixing base plate 406. The left pressure block 404 and right pressure block 405 move synchronously with their respective fixing base plates, achieving stepless adjustment of the distance between the left and right pressure blocks to match the outer diameter of the piston 3 to be flushed. The left pressure block fixing base plate 406 and right pressure block fixing base plate 407 are stacked vertically, and their sliding does not interfere with each other. This adjustment operation is only performed when using the piston for the first time or changing the piston model; it does not need to be repeated during continuous production of the same batch.

[0049] The specific steps are as follows: S1. Loading, sealing, and clamping process: An external conveying mechanism places a batch of pistons 3 into the positioning slots of the tray 204, with the internal cooling channel openings 301 of each piston 3 facing downwards, completing the initial positioning. The control system issues a command, and the tray drive motor 201 rotates forward, driving the tray 204 to move along the tray guide rail 203 via the tray screw 202, so that the internal cooling channel openings 301 of the pistons 3 are sealed and connected with the working end of the nozzle 506. Subsequently, the pressure frame motor 415 rotates forward, driving the pressure frame slide 401 to descend along the pressure frame guide rail 414 via the pressure frame screw 413. The pressure frame horizontal plate 403 descends synchronously with the pressure frame slide 401, and the left pressure block 404 and right pressure block 405 descend synchronously with the pressure frame horizontal plate 403 to press the top of the pistons 3. The left pressure block 404 and right pressure block 405 form a bidirectional clamp with the tray 204 below, firmly fixing the pistons 3.

[0050] S2. High-pressure rinsing with clean water: The control system issues a horizontal movement command, and the horizontal movement drive motor 101 rotates in the forward direction. It drives the drive pulley 103 to rotate through the main drive shaft 102. The drive pulley 103 drives the driven pulley 106 to rotate synchronously through the belt 105. During the movement, the belt 105 drives the horizontal movement frame 6 to move along the horizontal movement guide rail 603, moving the Z-axis slide table 5, nozzle 506, tray 204 and piston 3 horizontally from the loading and unloading station to directly above the water tank 9.

[0051] The control system issues a descent command, causing the Z-axis slide 501 to descend along the Z-axis guide rail 502, simultaneously lowering the nozzle 506, tray 204, and piston 3 until the piston 3 is completely submerged below the liquid surface of the water tank 9. The control system then opens the clean water valve 701 and starts the water pump 12. High-pressure clean water enters the nozzle 506 through the clean water pipeline and valve 701, sprays out from the working end of the nozzle 506, and enters the internal cooling channel of the piston 3, continuously rinsing for a preset time of 40 seconds. The impact force of the high-pressure water flow breaks up the solid salt core, and the clean water flushes the debris out of the internal cooling channel. The rinsed wastewater flows back to the water tank 9 for recycling. During this process, the flow sensor 706 monitors the instantaneous rinsing flow rate of each nozzle 506 in real time. When any flow rate value falls below a preset threshold, the control system immediately issues an alarm signal and marks the corresponding piston 3.

[0052] S3. High-pressure rinsing with softened water: After rinsing with clean water, the control system shuts off the water pump 12 and the clean water valve 701; the Z-axis slide 501 rises along the Z-axis guide rail 502, driving the nozzle 506, tray 204 and piston 3 to rise synchronously, so that the piston 3 is removed from the liquid surface of the water tank 9; the horizontal movement drive motor 101 rotates in the opposite direction, and the horizontal movement frame 6 moves in the opposite direction along the horizontal movement guide rail 603, moving the Z-axis slide 5, nozzle 506, tray 204 and piston 3 horizontally from above the water tank 9 to above the softened water tank 8. Z-axis slide 501 descends slightly along Z-axis guide rail 502, immersing the lower part of piston 3 in softened water in softened water tank 8, while nozzle 506 is above the liquid surface; control system opens softened water valve 702 and starts softened water pump 13, high-pressure softened water enters nozzle 506 through softened water pipeline and softened water valve 702, sprays out from working end of nozzle 506, enters internal cooling channel of piston 3, and continuously rinses for a preset time of 20 seconds to replace the residual high-salt solution in the channel and prevent salt stains from precipitating during subsequent drying.

[0053] S4. Static soaking in softened water: After the softened water rinsing is completed, the control system shuts off the softened water pump 13 and the softened water valve 702. The Z-axis slide 501 continues to descend along the Z-axis guide rail 502, completely immersing the piston 3 below the liquid surface of the softened water tank 8. All media supply is shut off, and the soaking time is preset to 3 minutes. During the soaking process, relying on osmosis and diffusion, the softened water enters the dead corners and micropores of the internal cooling channel, fully dissolving the trace amounts of salt remaining therein, further improving the cleanliness of the internal cooling channel.

[0054] S5. Compressed air purging and drying: After the static soaking process is completed, the Z-axis slide 501 rises along the Z-axis guide rail 502, raising the piston 3 above the liquid surface of the softening water tank 8. The control system opens the high-pressure air valve 703, and 0.7MPa compressed air enters the nozzle 506 through the compressed air pipeline and the high-pressure air valve 703. The compressed air is then blown out from the working end of the nozzle 506 and enters the internal cooling channel of the piston 3, continuously purging for a preset time of 15 seconds. The high-pressure compressed air blows out all the residual liquid and loose salt debris in the channel, simultaneously drying the inner wall of the channel.

[0055] S6. Automatic reset and unloading of equipment: After purging is completed, the control system closes the high-pressure air valve 703. The Z-axis slide 501 rises to its highest position along the Z-axis guide rail 502, and the horizontal movement drive motor 101 drives the horizontal movement frame 6 back to the loading / unloading position. The pressure frame motor 415 rotates in the opposite direction, the pressure frame device 4 rises and releases the piston 3, the tray drive motor 201 rotates in the opposite direction, and the tray 204 descends to the loading / unloading low position. The external conveying mechanism removes the flushed piston 3 from the tray 204, and one complete flushing cycle ends.

[0056] Throughout the operation of the equipment, the level sensor 10 and the salinity sensor 11 transmit monitoring signals to the control system in real time. The control system automatically executes the following control logic based on the preset process parameters: Regarding liquid level control: When the liquid level sensor 10 detects that the liquid level in the water tank 9 or the softened water tank 8 is lower than the preset lower limit of 200mm, the control system automatically opens the corresponding water inlet control valve (clean water inlet control valve 15 or softened water inlet control valve 17) to replenish the tank with new liquid. After the liquid level is restored to the preset range, the water inlet control valve is automatically closed.

[0057] Regarding salinity control: When salinity sensor 11 detects that the salinity in water tank 9 exceeds 12%, the control system simultaneously opens the clean water drain control valve 14 and the clean water inlet control valve 15 to discharge the high-salt wastewater and simultaneously replenish it with fresh clean water, thus replacing the old liquid with new one. Both valves are closed once the salinity drops to the process standard range. When salinity sensor 11 detects that the salinity in softened water tank 8 exceeds 3%, the control system simultaneously opens the softened water drain control valve 16 and the softened water inlet control valve 17 to replace the salinity, until the salinity drops to the process standard range, at which point both valves are closed.

[0058] Through the above-mentioned automatic liquid replenishment and sewage discharge control mechanism, the liquid level and salinity in the water tank 9 and softened water tank 8 are always maintained within the preset range allowed by the process, ensuring the consistency of the cleanliness of each batch of piston 3 rinsing, and effectively solving the defect of salt residue caused by the continuous increase of salinity in traditional single tank equipment.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic piston salt core flushing device, characterized in that, include: The frame (1) is equipped with a water tank (9) and a softening water tank (8). A horizontal moving frame (6) is slidably connected to the frame (1) and can reciprocate in the horizontal direction; Z-axis slide (5), which is slidably connected to the horizontal moving frame (6) and can reciprocate in the vertical direction; The tray (204) is slidably connected to the Z-axis slide (5) and is used to carry multiple pistons (3). Multiple nozzles (506) are fixed on the Z-axis slide (5) and correspond to the internal cooling channel opening (301) of the piston (3) respectively; multiple flushing medium pipelines are connected to the nozzles (506) to output different media in time to realize multiple flushing operations on the internal cooling channel of the piston (3); The horizontal moving frame (6) can drive the Z-axis slide (5), the nozzle (506) and the piston (3) to switch back and forth between the water tank (9) and the softened water tank (8). The Z-axis slide (5) can drive the nozzle (506) and the piston (3) to move up and down, so that the nozzle (506) and the piston (3) are above or inside the water tank (9) or the softened water tank (8).

2. The piston salt core automatic flushing device according to claim 1, characterized in that, A horizontal moving guide rail mounting plate (104) is fixed on the frame (1). The horizontal moving frame (6) includes a horizontal moving guide rail (603) and a horizontal moving frame upright plate (601). The horizontal moving guide rail (603) is fixed on the horizontal moving guide rail mounting plate (104). The bottom of the horizontal moving frame upright plate (601) is slidably connected to the horizontal moving guide rail (603) through a horizontal moving slider (604).

3. The piston salt core automatic flushing device according to claim 2, characterized in that, The Z-axis slide (5) includes a Z-axis guide rail (502) and a Z-axis slide plate (501). The Z-axis guide rail (502) is vertically fixed on the horizontal moving frame plate (601), and the Z-axis slide plate (501) is slidably connected to the Z-axis guide rail (502). A Z-axis horizontal base plate (505) is fixed on the Z-axis slide plate (501), and the nozzle (506) is installed on the Z-axis horizontal base plate (505).

4. The piston salt core automatic flushing device according to claim 3, characterized in that, The Z-axis slide (501) is fixed with a tray guide rail (203), and the tray (204) is slidably connected to the tray guide rail (203).

5. The piston salt core automatic flushing device according to claim 3, characterized in that, It also includes a pressure frame device (4), which includes a pressure frame guide rail (414), a pressure frame slide (401), and a pressure frame horizontal plate (403). The pressure frame guide rail (414) is fixed on the Z-axis slide (501), the pressure frame slide (401) is slidably connected to the pressure frame guide rail (414), and can rise and fall along the pressure frame guide rail (414). The pressure frame horizontal plate (403) is fixed on the pressure frame slide (401), and the bottom of the pressure frame horizontal plate (403) is equipped with a left pressure block (404) and a right pressure block (405) for pressing or releasing the piston (3).

6. The piston salt core automatic flushing device according to claim 5, characterized in that, A left pressure block adjusting handwheel (411) and a right pressure block adjusting handwheel (410) are installed at both ends of the horizontal plate (403) of the pressure frame. A left pressure block driving screw (416) and a right pressure block driving screw (409) are coaxially connected to the left pressure block adjusting handwheel (411) and the right pressure block adjusting handwheel (410), respectively. A left pressure block fixing base is threaded to the outer side of the left pressure block driving screw (416) and the right pressure block driving screw (409). The left pressure block fixing base plate (406) and the right pressure block fixing base plate (407) are slidably connected to the bottom wall of the horizontal plate (403) of the pressure frame; the right pressure block fixing base plate (407) is slidably connected to the bottom wall of the left pressure block fixing base plate (406); the left pressure block (404) and the right pressure block (405) are respectively fixed to the bottom walls of the left pressure block fixing base plate (406) and the right pressure block fixing base plate (407).

7. The piston salt core automatic flushing device according to claim 1, characterized in that, The multi-channel flushing medium pipeline includes a clean water pipeline, a softened water pipeline, and a compressed air pipeline; The water tank (9) is connected to the inlet of the water pump (12), and the outlet of the water pump (12) is connected to the nozzle (506) through the clean water pipeline. A clean water valve (701) is installed on the clean water pipeline. The softened water tank (8) is connected to the inlet of the softened water pump (13), and the outlet of the softened water pump (13) is connected to the nozzle (506) through the softened water pipeline. A softened water valve (702) is installed on the softened water pipeline. The compressed air source is connected to the nozzle (506) through the compressed air pipeline, and a high-pressure air valve (703) is installed on the compressed air pipeline.

8. The piston salt core automatic flushing device according to claim 1, characterized in that, A level sensor (10) and a salinity sensor (11) are respectively installed in the water tank (9) and the softening water tank (8).

9. The piston salt core automatic flushing device according to claim 1, characterized in that, A flow sensor (706) is installed in the connecting pipe of each of the nozzles (506).

10. An automatic flushing method for piston salt cores, characterized in that, The automatic piston salt core flushing device according to any one of claims 1-9 includes the following steps: S1: Place the piston (3) on the tray (204) so ​​that the nozzle (506) is aligned with the piston's internal cooling channel opening (301). Control the horizontal moving frame (6) to move the piston (3) above the water tank (9). Lower the Z-axis slide (5) to allow the piston (3) to enter the water tank (9). Introduce high-pressure clean water into the nozzle (506) to rinse the internal cooling channel of the piston (3). S2: After rinsing, control the Z-axis slide (5) to rise so that the piston (3) is removed from the water tank (9), and move the piston (3) above the softening water tank (8) through the horizontal moving frame (6). The Z-axis slide (5) descends so that the piston (3) enters the softening water tank (8), and high-pressure softened water is introduced into the nozzle (506) to rinse the internal cooling channel of the piston (3). S3: After rinsing, control the Z-axis slide (5) to continue to descend so that the piston (3) is immersed below the liquid surface of the softened water tank (8) for soaking; S4: After soaking, control the Z-axis slide (5) to rise so that the piston (3) moves above the liquid surface of the softened water tank (8), and introduce compressed air into the nozzle (506) to purge the internal cooling channel of the piston (3); S5: After purging is completed, control the Z-axis slide (5) to rise, so that the piston (3) moves out of the softening water tank (8) and moves horizontally to the standby position above the water tank (9), and issues a work completion alarm; remove the rinsed piston, install a new piston to be rinsed, and repeat the work cycle.

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