High pressure cleaning method and device for brazing heat treatment of valve plate type products

Abstract

The application discloses a high-pressure cleaning method and device for valve plate products after brazing heat treatment. The method first fixes the valve plate products in a 45-degree inclined working posture, with the back interfaces facing obliquely downward. Then, according to a preset interface blowing sequence, corresponding blowing nozzles are sequentially controlled to form sealed butt joints with the interfaces and to pass high-pressure gas, while the interfaces that have completed cleaning are kept sealed but stop passing gas, and the remaining interfaces are kept open, so that unidirectional and penetrating turbulent flow is forcedly formed inside the flow channel of the valve plate products, and gravity is used to assist in slag removal. The corresponding device comprises a positioning tool for realizing the above-mentioned inclined fixation and a blowing tool provided obliquely downward of the positioning tool and provided with a plurality of blowing nozzles that can be independently controlled. The application can systematically remove brazing residues in complex flow channels, ensures efficient and lossless cleaning, and ensures high consistency in batch production.

Description

Technical Field

[0001] This invention relates to the field of post-processing technology for valve plate products in the thermal management system of new energy vehicles, and in particular to a high-pressure cleaning method and apparatus for valve plate products after brazing heat treatment. Background Technology

[0002] In the thermal management system of new energy vehicles, the valve plate is a key component for flow distribution and flow direction control, with a complex internal flow channel and valve cavity structure. After brazing heat treatment, valve plate products will have residual flux (especially corrosive fluoride flux), oxides, and welding slag on their internal complex flow channels and valve cavity structure, as well as on the weld edges. If these residues are not removed, they will seriously affect the performance and reliability of the valve plate.

[0003] Currently, cleaning methods for valve plates after brazing heat treatment include water immersion cleaning, ultrasonic cleaning, and manual high-pressure air gun rinsing. Water immersion cleaning is insufficient to thoroughly remove residues from complex flow channels and valve cavity structures. Ultrasonic cleaning may damage the weld. The cleaning effect of manual high-pressure air gun rinsing depends entirely on the operator's experience and condition; the rinsing angle, force, time, and sequence cannot be kept consistent, resulting in inconsistent cleaning effects for different workpieces and even different areas of the same workpiece. Because it is impossible to selectively seal and direct the flow of multiple interfaces of valve plates during rinsing, the high-pressure airflow is prone to "short-circuiting" in complex flow channels, failing to ensure effective rinsing of all internal valve cavity structures and tortuous flow channels, resulting in cleaning dead zones. Manual operation is inefficient, lacks quality control, and is difficult to trace, failing to meet the large-scale, automated, and high-quality production requirements of valve plates for new energy vehicles. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-pressure cleaning method and apparatus for valve plate products after brazing heat treatment, which can automatically, efficiently, non-destructively, and consistently clean the complex internal flow channels and valve cavities of valve plate products, and has high flexible production capabilities.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: In a first aspect, the present invention provides a high-pressure cleaning method for valve plate products after brazing heat treatment, comprising the following steps: Step 1: Fix the valve plate product in a 45° tilt working position, so that the openings of the interfaces on the back of the valve plate product are all facing downwards. Step 2: Provide multiple independently controllable air nozzles, each air nozzle aligned with one interface on the valve plate product; Step 3: Following the preset interface blowing sequence, for the nth interface in the interface blowing sequence, perform the following operations: Control the air nozzle aligned with the nth interface to move along its axial direction to form a sealed connection with the nth interface and introduce high-pressure gas into the nth interface; Simultaneously control each air nozzle aligned with the first to the (n-1)th interfaces to maintain a sealed connection with the corresponding interface, but stop the supply of high-pressure gas; At the same time, keep all air nozzles aligned with all other interfaces in an unconnected state, keeping these interfaces open. As a result, high-pressure gas enters the internal flow channel and valve cavity of the valve plate product from the nth interface, forming turbulence to strip away residues and causing the residues to be discharged from the open interface. Where n = 1, 2, ..., N-1, and N represents the number of interfaces.

[0006] In some embodiments, the valve plate product is fixed in a 45° inclined working posture by driving the valve plate product to rotate, thereby changing it from a horizontal loading / unloading posture to the 45° inclined working posture. In this method, by limiting the rotation from the horizontal loading / unloading posture to achieve inclined fixation, the process of obtaining the inclined posture of the valve plate product is accurate, reliable, and easily automated, providing a guarantee for gravity-assisted slag removal.

[0007] In some embodiments, the pressure of the high-pressure gas is between 0.5 MPa and 1.2 MPa, and the flow rate is not less than 500 L / min. In this method, by limiting the pressure range of the high-pressure gas to 0.5 MPa to 1.2 MPa and the flow rate to not less than 500 L / min, the blown-in airflow has sufficient kinetic energy to effectively remove residues, while confining this kinetic energy within a verified safety threshold. This achieves an optimal balance between ensuring efficient cleaning and avoiding damage to the precision structure of valve plate products.

[0008] Secondly, the present invention provides a high-pressure cleaning apparatus for implementing the high-pressure cleaning method, comprising: Positioning fixtures are used to fix valve plate products and maintain them in a 45° tilted working posture, so that the openings of the interfaces on the back of the valve plate products all face downwards. An air blowing fixture is located diagonally below the positioning fixture. It includes multiple independently controllable air blowing nozzles. The spatial arrangement of each air blowing nozzle corresponds to the position of each interface on the valve plate product in a 45° inclined working posture. The air blowing nozzle is driven to move along its axial direction to form a sealed connection with the corresponding interface and selectively introduce or stop the introduction of high-pressure gas, or disengage from the corresponding interface.

[0009] In some embodiments, the positioning fixture is a quick-change modular structure, comprising a contoured positioning plate that matches the shape of a specific model of valve plate product, and multiple clamping cylinders for pressing the valve plate product onto the contoured positioning plate. In this structure, by configuring the positioning fixture as a quick-change modular structure with a contoured positioning plate and multiple clamping cylinders, the device can quickly and accurately adapt to and clamp different models of valve plate products. This achieves high flexibility and high utilization of the device, while ensuring the absolute stability of the valve plate product's position during cleaning, thus guaranteeing consistent cleaning results.

[0010] In some embodiments, the positioning fixture is connected to a rotary drive mechanism, which drives the positioning fixture to rotate, thereby switching the valve plate-like product fixed on the positioning fixture between a horizontal loading / unloading posture and a 45° inclined working posture. In this structure, by connecting the positioning fixture to a rotary drive mechanism, the valve plate-like product can automatically switch between a horizontal loading / unloading posture and a 45° inclined working posture, improving the automation level and process smoothness of the entire device operation.

[0011] In some embodiments, the rotary drive mechanism includes a servo motor and a rotating base plate driven by the servo motor, with the positioning fixture fixed to the rotating base plate. In this structure, by specifically configuring the rotary drive mechanism as a servo motor-driven rotating base plate, high precision and repeatability of the tilt angle control are achieved, ensuring absolute uniformity in the cleaning posture of each valve plate product. This is a prerequisite for achieving stable and consistent cleaning results.

[0012] In some embodiments, each of the blowing nozzles is connected to an independent linear drive cylinder, which drives the connected blowing nozzle to move along its axial direction. The air passage of each blowing nozzle is controlled by an independent solenoid valve. In this structure, by configuring an independent linear drive cylinder and solenoid valve for each blowing nozzle, the axial sealing and docking action of each nozzle and the on / off state of the high-pressure gas can be independently, precisely, and rapidly controlled, thereby providing a reliable and efficient physical execution basis for executing complex sequential dynamic purging logic.

[0013] In some embodiments, the air-blowing fixture is connected to a horizontal translation mechanism, which drives the air-blowing fixture to move horizontally to approach or move away from the positioning fixture. In this structure, by connecting the air-blowing fixture to the horizontal translation mechanism, the entire air-blowing fixture can be moved into the working position or out to the waiting position, thereby optimizing the device layout, facilitating the loading and unloading of valve plate products and the maintenance of the device, and improving the safety and convenience of operation; at the same time, it also facilitates the overall replacement of the air-blowing fixture to be suitable for cleaning different models of valve plate products.

[0014] In some embodiments, the high-pressure cleaning apparatus further includes: The chassis forms a box-shaped protective structure that surrounds the positioning fixture and the air blowing fixture; A residue collector is located below the chassis. The bottom of the chassis has a slag discharge port that communicates with the residue collector. The residue collector is used to collect residues discharged from the open interfaces of valve plate-type products fixed on the positioning fixture. An air tank is installed on the top of the chassis and connected to the air passages of each of the air nozzles via pipelines.

[0015] In this structure, by introducing a box-shaped protective enclosure surrounding the core tooling (positioning tooling and air blowing tooling), a residue collector located below it, and an air storage tank installed on top, the cleaning process is enclosed within the enclosure, effectively preventing residue from splashing and polluting the environment. At the same time, it achieves centralized collection of residue and integrated supply of a stable air source, thus forming a complete, clean, and self-sustaining automated workstation.

[0016] Compared with the prior art, the advantages of the present invention are as follows: This invention fixes valve plate products at a 45° tilt during operation and uses gravity assistance to facilitate the movement and eventual discharge of stripped residues with the airflow. Through a dynamic sequential purging logic of "one-hole intake, multiple-hole sealing, and remaining-hole opening," a unidirectional, unsteady, powerful airflow path is forcibly established within complex flow channels. This avoids airflow short-circuiting and pressure cancellation caused by simultaneous intake from multiple ports, ensuring that high-pressure gas can penetrate and flow through all the tortuous flow channels and valve cavities requiring cleaning, systematically eliminating cleaning dead zones.

[0017] The cleaning process of the present invention is based on a preset air blowing sequence for the interfaces. The switching of all interface states (air intake, blockage, and opening) is strictly defined by this sequence, which standardizes and proceduralizes the cleaning process and completely eliminates the arbitrariness of manual rinsing in terms of sequence, angle, force, and time. This ensures a high degree of consistency in cleaning effect between different models of valve plate products and different batches.

[0018] The method of this invention limits the use of high-pressure gas as the cleaning medium, thus avoiding the corrosion problems that may be caused by liquid immersion.

[0019] The method of this invention has a high degree of automation, high cleaning efficiency, and controllable quality.

[0020] The device of this invention, through the cooperation of positioning fixture and air blowing fixture, solidifies the method of this invention into a specific, automatically operating physical device, providing the necessary hardware entity to completely replace inefficient and unstable manual flushing.

[0021] The air blowing fixture in the device of this invention requires that the air blowing nozzle and the interface on the valve plate product be spatially aligned and sealed together. This structural feature ensures that the energy of the high-pressure gas is accurately introduced into the flow channel of the valve plate product, rather than randomly impacting the outer surface or precision weld of the valve plate product, thus avoiding damage to the outer surface and precision weld of the valve plate product.

[0022] The device of this invention can design the positioning fixture and the air blowing fixture as quick-change modules, which can flexibly adapt to different models of valve plate products, realize highly flexible production, and significantly improve the utilization rate of the device.

[0023] The air nozzle of the device of the present invention can be independently controlled and can perform a compound action of "airing, stopping air, and disconnecting", which provides a reliable physical execution basis for accurately reproducing complex dynamic purging logic and effectively cleaning complex flow channels and valve chambers on the device.

[0024] The device of this invention ensures that each valve plate product is processed in the exact same 45° tilt working posture through precise clamping and posture maintenance by the positioning fixture. Simultaneously, the fixed spatial correspondence between the air nozzles and interfaces in the air blowing fixture, and the characteristic that each nozzle can be independently and programmatically driven and controlled, allows the complex dynamic sequential blowing logic to be repeatedly executed without deviation on each valve plate product. This combination of deterministic physical structure and deterministic control program eliminates human factors and random errors at the source, ensuring absolute consistency of cleaning results in mass production.

[0025] The conformal arrangement of the air-blowing fixture in this invention ensures that the high-pressure airflow is precisely targeted at every interface to be cleaned. The air-blowing nozzles can independently perform a combination of sealing and selectively opening / closing the airflow, making it the only way to achieve the dynamic airflow control strategy of "one-hole air intake, multiple-hole sealing, and remaining-hole open." This structural characteristic enables the device to forcibly establish a non-steady, powerful airflow path within valve plate-type products, compelling the airflow to reach tortuous channels and concealed valve cavities inaccessible by traditional methods, thus systematically solving the problem of cleaning dead zones in complex internal structures. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device of the present invention (applied to the first type of valve plate product). Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the device of the present invention (applied to the first type of valve plate product). Figure 2 ; Figure 4 This is a schematic diagram of the positioning fixture clamping valve plate products in the device of the present invention (applied to the first type of valve plate products); Figure 5 This is a schematic diagram of the air blowing fixture in the device of the present invention (applied to the first type of valve plate product). Figure 1 ; Figure 6 This is a schematic diagram of the air blowing fixture in the device of the present invention (applied to the first type of valve plate product). Figure 2 ; Figure 7 This is a schematic diagram of the internal structure of the device of the present invention (applied to a second type of valve plate product) (with the air blowing fixture in its initial position). Figure 1 ; Figure 8 This is a schematic diagram of the internal structure of the device of the present invention (applied to a second type of valve plate product) (with the air blowing fixture in its initial position). Figure 2 ; Figure 9 This is a schematic diagram of the internal structure of the device of the present invention (applied to a second type of valve plate product); Figure 10 This is a schematic diagram of the positioning fixture clamping valve plate products in the device of the present invention (applied to the second type of valve plate products). Figure 1 ; Figure 11 This is a schematic diagram of the positioning fixture clamping valve plate products in the device of the present invention (applied to the second type of valve plate products). Figure 2 ; Figure 12 This is a schematic diagram of the air blowing fixture in the device of the present invention (applied to the second type of valve plate product). Figure 1 ; Figure 13 This is a schematic diagram of the air blowing fixture in the device of the present invention (applied to the second type of valve plate product). Figure 2 ; Figure 14 This is a schematic diagram of a connection structure between the nozzle and the cylinder in the device of the present invention; Figure 15 This is a schematic diagram of the rotary drive mechanism in the device of the present invention. Figure 1 ; Figure 16 This is a schematic diagram of the rotary drive mechanism in the device of the present invention. Figure 2 ; Figure 17 This is a schematic diagram of the horizontal translation mechanism in the device of the present invention; Figure 18 This is a schematic diagram of the structure of the residue collector in the device of the present invention; Figure 19 This is a schematic diagram of the internal structure of the device of the present invention (applied to a second type of valve plate product) (both the positioning fixture and the air blowing fixture are in the initial position); Figure 20 This is a schematic diagram of the back structure of the second type of valve plate product; Figure 21 This is a schematic diagram of the front structure of the second type of valve plate product. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In a first aspect, embodiments of the present invention provide a high-pressure cleaning method for valve plate products after brazing heat treatment, which includes the following steps: Step 1: Fix the valve plate product in a 45° tilt working posture, so that the opening direction of the interface on the back of the valve plate product is facing downwards. At this time, the central axis of the interface on the back of the valve plate product forms a 45° angle with the vertical direction.

[0029] In some embodiments, the valve plate product is fixed in a 45° inclined working posture by driving the valve plate product to rotate, so that it changes from a horizontal loading and unloading posture to a 45° inclined working posture.

[0030] As an example, a servo motor is used to drive the rotation of valve plate products.

[0031] When valve plate products are in a horizontal position, loading and unloading them is inconvenient. Therefore, as a preferred embodiment, the operator places the valve plate product in a horizontal loading and unloading position with the back facing up on the positioning fixture. Then, the positioning fixture rotates 135° around the horizontal axis, so that the valve plate product reaches a 45° tilted working position with the back interface facing downwards.

[0032] As an example, robots can be used to load and unload materials.

[0033] Since the interface positions of different models of valve plate products vary, most valve plate products have interfaces located on the back, while a few interfaces of some valve plate products are located on the side and / or front. Therefore, the position of valve plate products during cleaning is determined by limiting the opening direction of the interfaces on the back.

[0034] Step 2: Provide multiple independently controllable air nozzles, each air nozzle aligned with an interface on the valve plate product.

[0035] As an example, the central axis of each air nozzle is substantially collinear with the central axis of the interface it is aligned with.

[0036] As a preferred embodiment, each air nozzle can be independently controlled to move along its axial direction and to turn on / off the air.

[0037] Step 3: Following the preset interface blowing order, for the nth interface in the interface blowing order (n=1,2,...,N-1, where N represents the number of interfaces), perform the following operations: Control the air nozzle aligned with the nth interface to move along its axial direction to form a sealed connection with the nth interface and introduce high-pressure gas into the nth interface; Simultaneously control each air nozzle aligned with the first to the (n-1)th interfaces to maintain a sealed connection with the corresponding interface, but stop the supply of high-pressure gas; At the same time, keep all air nozzles aligned with all other interfaces in an unconnected state, keeping these interfaces open. As a result, high-pressure gas enters the internal flow channel and valve cavity of the valve plate product from the nth interface, forming turbulence to strip away residues and causing the residues to be discharged from the open interface. The discharged residues are collected under the action of gravity.

[0038] As an example, high-pressure gas is compressed air.

[0039] In some embodiments, the pressure of the high-pressure gas is 0.5 MPa to 1.2 MPa, and the flow rate is not less than 500 L / min.

[0040] As an example, the pressure of the high-pressure gas is 0.8 MPa and the flow rate is 700 L / min.

[0041] As mentioned above, the preset air blowing sequence for the interfaces varies for different valve plate products. The air blowing sequence for the interfaces can be determined through limited experiments with the aim of achieving the best cleaning effect.

[0042] As mentioned above, the duration for introducing high-pressure gas into the nth interface is preset. The preset duration varies for different interfaces, which is related to the interface position. The duration can be set through limited experiments.

[0043] Figure 20 and Figure 21 A valve plate product is given, and the interface names distributed on its back, side, and front are shown. When cleaning this valve plate product, the interface blowing sequence and the duration of introducing high-pressure gas, i.e., the flushing time, are listed in Table 1.

[0044] Table 1 Interface blowing sequence and the duration of introducing high-pressure gas, i.e., the flushing time

[0045] In Table 1, "in" means sealed docking and introducing high-pressure gas; "off" means sealed docking but stopping introducing high-pressure gas; "open" means the interface remains open.

[0046] The process of the above step 3 can be executed cyclically.

[0047] In a second aspect, an embodiment of the present invention provides a high-pressure cleaning device for a valve plate product after brazing heat treatment. As Figures 1 to 21 shown, it includes: a positioning tooling 1 for fixing and holding the valve plate product 9 in a 45° inclined working posture, such that the opening directions of the interfaces 91 on the back of the valve plate product 9 all face obliquely downward; a blowing tooling 2 arranged obliquely below the positioning tooling 1, which includes a plurality of independently controllable blowing nozzles 21. The spatial arrangement positions of the blowing nozzles 21 correspond to the positions of the interfaces 91 on the back and side of the valve plate product 9 in the 45° inclined working posture. The blowing nozzles 21 are driven to move along their axial directions to form sealed docking with the corresponding interfaces 91 and selectively introduce or stop introducing high-pressure gas, or disengage from the corresponding interfaces 91.

[0048] In some embodiments, the high-pressure cleaning device further includes a chassis 3, forming a box-shaped protective structure surrounding the positioning tooling 1 and the blowing tooling 2. In this way, the entire cleaning process is enclosed in the chassis 3, effectively preventing the residues from splashing and polluting the environment.

[0049] In some embodiments, the high-pressure cleaning device further includes a residue collector 41 arranged below the chassis 3. A slag discharge port 31 communicating with the residue collector 41 is provided at the bottom of the chassis 3. The residue collector 41 is used to collect the residues discharged from the interfaces 91 that remain open on the valve plate product 9 fixed on the positioning tooling 1, achieving centralized collection of the residues. In fact, as Figure 1 shown, an electric control box 4 can be arranged below the chassis 3, and a part of the space in the electric control box 4 can be reserved to form the residue collector 41.

[0050] In some embodiments, the high-pressure cleaning device also includes an air storage tank 5, which is installed on the top of the housing 3 and connected to the air passage of each air nozzle 21 through a pipeline, thereby realizing an integrated supply of stable air source.

[0051] In some embodiments, the positioning fixture 1 is a modular structure that can be quickly replaced, which can flexibly adapt to different models of valve plate products 9, realize highly flexible production, and significantly improve the utilization rate of the equipment. The positioning fixture 1 includes a contour positioning plate 11 that matches the front shape of a specific model of valve plate product 9, and a plurality of clamping cylinders 12 for pressing the valve plate product 9 onto the contour positioning plate 11.

[0052] In some embodiments, the positioning fixture 1 further includes a fixing plate 13, which is arranged parallel to and connected to the contour positioning plate 11. The contour positioning plate 11 is provided with various holes (not shown in the figure) that are adapted to the front of a specific model of valve plate product 9. Since the front part of the valve plate product 9 may protrude from the contour positioning plate 11, a certain distance must be maintained between the fixing plate 13 and the contour positioning plate 11. The clamping cylinders 12 are distributed and installed on the fixing plate 13.

[0053] In some embodiments, the positioning fixture 1 is connected to a rotary drive mechanism 6, which drives the positioning fixture 1 to rotate so that the valve plate product 9 fixed on the positioning fixture 1 can switch between a horizontal loading and unloading posture and a 45° inclined working posture. That is, loading is performed in the horizontal loading and unloading posture, rotating to the 45° inclined working posture for cleaning, and after cleaning, rotating back to the horizontal loading and unloading posture for unloading.

[0054] In some embodiments, the rotary drive mechanism 6 includes a servo motor 61 and a rotary base plate 62 driven by the servo motor 61. The positioning fixture 1 is detachably fixed to the rotary base plate 62, specifically, the fixing plate 13 of the positioning fixture 1 is detachably fixed to the rotary base plate 62.

[0055] Specifically, the rotary drive mechanism 6 consists of three parts: drive transmission, support rotation, and positioning and locking. Drive transmission section: Power is provided by servo motor 61, whose output end is connected to reducer 63 to achieve speed regulation and torque increase. Power is transmitted through belt drive system, which includes drive pulley 64 mounted on the output shaft of reducer 63, driven pulley 65 mounted on rotating main shaft 67, and belt 66 tensioned between the two pulleys.

[0056] Supporting the rotating part: The rotating spindle 67 is supported on a base plate support frame 681 by bearings. The inner side of the rotating spindle 67 (i.e., the side closest to the rotating base plate 62) is provided with a clamping end for firmly clamping and fixing the corresponding side of the rotating base plate 62, thus forming the main drive and load-bearing connection. To balance the structure and provide a stable rotation axis, an auxiliary connector 69 is used to achieve a rotatable connection with another symmetrically arranged base plate support frame 682 on the other side of the rotating base plate 62. The entire rotating drive mechanism 6 is fixed to the bottom of the housing 3 by these two base plate support frames, which are located on both sides of the slag discharge port 31.

[0057] Positioning and locking mechanism: To ensure the accuracy and safety of the 45° tilted working posture, two limit cylinders 60 are installed on the base plate support frame 682 on one side. When the rotating spindle 67 drives the rotating base plate 62 and the valve plate product 9 fixed on the positioning fixture 1 to rotate to the preset 45° tilted working position, the cylinder rod of the limit cylinder 60 extends and cooperates with the limit block 691 set on the auxiliary connecting piece 69 to achieve mechanical locking. This design effectively prevents accidental displacement caused by reaction force or vibration during high-pressure air blowing, ensuring the stability and reliability of the cleaning process.

[0058] In some embodiments, each air nozzle 21 is connected to an independent linear drive cylinder 22. The linear drive cylinder 22 is used to drive the air nozzle 21 connected to it to move along its axial direction. The air passage of each air nozzle 21 is controlled by an independent solenoid valve (not shown in the figure). All solenoid valves can be integrated into a valve island and controlled by a PLC to achieve rapid and precise switching between the "air supply" and "air stop" states of any air nozzle 21, so as to blow compressed air into the interface 91 according to the preset interface air supply sequence.

[0059] As an example, the air nozzle 21 is provided with rubber or silicone to ensure a tight seal when mating with the interface 91.

[0060] In some embodiments, the air blowing fixture 2 is connected to a horizontal translation mechanism 7, which is used to drive the air blowing fixture 2 to move horizontally to approach or move away from the positioning fixture 1.

[0061] In this embodiment of the invention, the air-blowing fixture 2 is the core module for achieving precise injection of high-pressure gas. It is a modular structure that can be quickly replaced, flexibly adapting to different models of valve plate products 9, achieving highly flexible production and significantly improving equipment utilization. The structure of the air-blowing fixture 2 is specifically designed for the interfaces 91 on the back and sides of the valve plate products 9. The main body of the air-blowing fixture 2 is a support frame 23 with an isosceles right-angle structure, meaning the angle between the inclined surface 231 of the support frame 23 and the plane 232 is 45°. The inclined surface 231 of the support frame 23 serves as the core mounting reference surface. The air-blowing fixture 2 also includes a guide plate 24, which is parallel to and fixed to the inclined surface 231 of the support frame 23. For the air nozzle 21 aligned with the interface 91 on the back of the valve plate product 9, the connected linear drive cylinder 22 is fixed on the inclined surface 231 of the support frame 23. The cylinder rod of the linear drive cylinder 22 passes through the guide hole on the guide plate 24 via the extension rod 25 and is connected to the air nozzle 21. The extension rod 25 spatially decouples the installation position of the linear drive cylinder 22 from the working position of the air nozzle 21, thereby avoiding the structural interference risk caused by space constraints in the lowest cost and most reliable way. For the air nozzle 21 aligned with the interface 91 on the side of the valve plate product 9, the connected linear drive cylinder 22 is fixed on the guide plate 24. These linear drive cylinders 22 can be rodless cylinders, and the air nozzle 21 is directly mounted on the rodless cylinder.

[0062] Some valve plate products 9 have interfaces 91 only located on the back and sides, so these valve plate products 9 can be cleaned using the air blowing fixture 2. However, some valve plate products 9 have a few interfaces 91 located on the front, such as... Figure 10 and Figure 21 As shown, the nozzles aligned with these interfaces 91 need to be located on the front side of the valve plate product 9, and cannot be set on the inclined surface 231 of the support frame 23 or the guide plate 24. Therefore, the present invention has specially designed an independent, detachable front air blowing module 8, which includes a mounting bracket 81, multiple independently controllable auxiliary nozzles 82, and an auxiliary cylinder 83 that drives the auxiliary nozzles 82 to move along their axial direction. The mounting bracket 81 is fixed on the fixing plate 13 of the positioning fixture 1, and the auxiliary cylinder 83 is fixed on the mounting bracket 81. The spatial arrangement of each auxiliary nozzle 82 corresponds to the position of each interface 91 on the front side of the valve plate product 9 in a 45° inclined working posture. The auxiliary nozzles 82 are driven to move along their axial direction to form a sealed connection with the corresponding interface 91 and selectively introduce or stop the introduction of high-pressure gas, or disengage from the corresponding interface 91. Figure 21 The interfaces 91 on the front of the valve plate product 9 shown are relatively protruding, therefore, the fixing plate 13 of the positioning fixture 1 also has holes adapted to these interfaces 91. Figure 10As shown, the front air blowing module 8 can also be configured with an auxiliary extension rod 84 according to actual conditions. The cylinder rod of the auxiliary cylinder 83 is connected to the auxiliary nozzle 82 through the auxiliary extension rod 84. The air tank 5 is connected to the air passage of each auxiliary nozzle 82 through a pipeline.

[0063] When the front air blowing module 8 is installed on the fixed plate 13 of the positioning fixture 1, a through hole 621 for the front air blowing module 8 to pass through needs to be opened on the rotating base plate 62.

[0064] In addition, there are some valve plate products, such as... Figure 20 and Figure 21 The second type of valve plate product shown has a large AD drying barrel. When the blowing fixture 2 moves to the lower side of the positioning fixture 1, the AD drying barrel will interfere with the guide plate 24. Therefore, a through hole adapted to the AD drying barrel will be opened on the guide plate 24. At the same time, due to this structural limitation, there is not enough space on the guide plate 24 to set the blowing nozzles 21 and their linear drive cylinders 22 corresponding to the interfaces 91 distributed on the side near the AD drying barrel. In this case, the linear drive cylinders 22 corresponding to these interfaces 91 can be installed on the fixing plate 13 of the positioning fixture 1.

[0065] In this embodiment of the invention, the horizontal translation mechanism 7 includes a translation base plate 71 and a rodless cylinder 72. The translation base plate 71 is connected to the bottom of the chassis 3 through a linear guide pair 73. The plane 232 of the support frame 23 is detachably mounted on the translation base plate 71. The rodless cylinder 72 is connected to the translation base plate 71 to drive the translation base plate 71 to move linearly.

[0066] The operation process of the device of the present invention is as follows: the rotary drive mechanism 6 works to rotate the rotating base plate 62, and stops when the positioning fixture 1 is horizontally upward; loading, that is, placing the valve plate product 9 on the positioning fixture 1 with its back facing upward in a horizontal loading and unloading posture, such as... Figure 19 As shown; the rotary drive mechanism 6 rotates the base plate 62, and stops when the valve plate product 9 reaches a 45° tilt and the rear interface 91 faces downwards at a 45° tilt working posture, as shown. Figure 8 As shown; the horizontal translation mechanism 7 moves the air blowing fixture 2 to a position diagonally below the valve plate product 9, as shown. Figure 9 As shown; according to the preset air blowing sequence, high-pressure gas is introduced into each interface 91 for cleaning; after cleaning, the horizontal translation mechanism 7 moves the air blowing fixture 2 to the initial position; the rotation drive mechanism 6 rotates the rotating base plate 62, and stops when the positioning fixture 1 is horizontally upward, and then unloads the material.

Claims

1. A high-pressure cleaning method for valve plate products after brazing heat treatment, characterized in that, Includes the following steps: Step 1: Fix the valve plate product in a 45° tilt working position, so that the openings of the interfaces on the back of the valve plate product are all facing downwards. Step 2: Provide multiple independently controllable air nozzles, each air nozzle aligned with one interface on the valve plate product; Step 3: Following the preset interface blowing sequence, for the nth interface in the interface blowing sequence, perform the following operations: Control the air nozzle aligned with the nth interface to move along its axial direction to form a sealed connection with the nth interface and introduce high-pressure gas into the nth interface; Simultaneously control each air nozzle aligned with the first to the (n-1)th interfaces to maintain a sealed connection with the corresponding interface, but stop the supply of high-pressure gas; At the same time, keep all air nozzles aligned with all other interfaces in an unconnected state, keeping these interfaces open. As a result, high-pressure gas enters the internal flow channel and valve cavity of the valve plate product from the nth interface, forming turbulence to strip away residues and causing the residues to be discharged from the open interface. Where n = 1, 2, ..., N-1, and N represents the number of interfaces.

2. The high-pressure cleaning method for valve plate products after brazing heat treatment according to claim 1, characterized in that, The valve plate product is fixed in a 45° inclined working posture by driving the valve plate product to rotate, so that it changes from a horizontal loading and unloading posture to the 45° inclined working posture.

3. The high-pressure cleaning method for valve plate products after brazing heat treatment according to claim 1, characterized in that, The pressure of the high-pressure gas is 0.5 MPa to 1.2 MPa, and the flow rate is not less than 500 L / min.

4. A high-pressure cleaning apparatus for implementing the high-pressure cleaning method according to any one of claims 1 to 3, characterized in that, include: Positioning fixtures are used to fix valve plate products and maintain them in a 45° tilted working posture, so that the openings of the interfaces on the back of the valve plate products all face downwards. An air blowing fixture is located diagonally below the positioning fixture. It includes multiple independently controllable air blowing nozzles. The spatial arrangement of each air blowing nozzle corresponds to the position of each interface on the valve plate product in a 45° inclined working posture. The air blowing nozzle is driven to move along its axial direction to form a sealed connection with the corresponding interface and selectively introduce or stop the introduction of high-pressure gas, or disengage from the corresponding interface.

5. The high-pressure cleaning device according to claim 4, characterized in that, The positioning fixture is a modular structure that can be quickly replaced. The positioning fixture includes a contour positioning plate that matches the shape of a specific model of valve plate product, and multiple clamping cylinders for pressing the valve plate product onto the contour positioning plate.

6. The high-pressure cleaning device according to claim 4, characterized in that, The positioning fixture is connected to a rotary drive mechanism, which drives the positioning fixture to rotate so that the valve plate product fixed on the positioning fixture can switch between a horizontal loading / unloading posture and a 45° inclined working posture.

7. The high-pressure cleaning device according to claim 6, characterized in that, The rotary drive mechanism includes a servo motor and a rotary base plate driven by the servo motor, and the positioning fixture is fixed on the rotary base plate.

8. The high-pressure cleaning device according to claim 4, characterized in that, Each of the air-blowing nozzles is connected to an independent linear drive cylinder, which drives the air-blowing nozzle connected to it to move along its axial direction. The air passage of each air-blowing nozzle is controlled by an independent solenoid valve.

9. The high-pressure cleaning device according to claim 4, characterized in that, The air blowing fixture is connected to a horizontal translation mechanism, which drives the air blowing fixture to move horizontally to approach or move away from the positioning fixture.

10. The high-pressure cleaning device according to claim 4, characterized in that, Also includes: The chassis forms a box-shaped protective structure that surrounds the positioning fixture and the air blowing fixture; A residue collector is located below the chassis. The bottom of the chassis has a slag discharge port that communicates with the residue collector. The residue collector is used to collect residues discharged from the open interfaces of valve plate-type products fixed on the positioning fixture. An air tank is installed on the top of the chassis and connected to the air passages of each of the air nozzles via pipelines.

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