High-pressure water jet sandblasting cleaning control system and method based on metal plate width

Abstract

The present invention relates to the technical field of sandblasting equipment control, and discloses a high-pressure water jet sandblasting cleaning control system and method based on the width of a metal sheet. The system comprises a central processing unit, a cleaning station, a conveying device, and a sand valve control module. The cleaning station comprises a plurality of cleaning boxes, and cleaning nozzles are arranged in the cleaning boxes. Each cleaning box is responsible for cleaning different width intervals along the width direction of the conveying device. Cleaning nozzles are arranged in each cleaning box along the width direction of the conveying device and cover the width interval that the cleaning box is responsible for cleaning. The central processing unit receives a width signal of a metal sheet, determines the opening number of a sand supply valve according to the width signal, and sends a sand valve control signal to a sand valve control module based on the opening number of the sand supply valve. The sand valve control module adjusts the opening number of the sand supply valve according to the sand valve control signal, thereby solving the problem that the existing high-pressure water jet sandblasting cleaning metal sheet production line cannot meet the cleaning requirements of metal sheets of different widths through mechanical adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of sandblasting equipment control, and in particular to a high-pressure water jet sandblasting control system and method based on the width of a metal plate. Background Art

[0002] High-pressure water jet sandblasting to clean metal plates is a new green and environmentally friendly cleaning technology. It uses high-pressure water as the driving force of the abrasive. The abrasive speed is much higher than dry shot blasting and wet shot blasting technology, which can achieve higher descaling and cleaning efficiency. The abrasive particle size used is smaller than that of shot blasting technology. From the perspective of descaling mechanism, the overlap of the abrasive landing points on the steel plate surface is higher, the coverage area is wider, and the descaling effect is better. Especially in the case of wear-resistant steel, engineering machinery steel and other steel types, these steel plates have high strength, complex oxide scale composition, and strong adhesion, which are difficult to remove by conventional means. After cleaning with high-pressure water jet sandblasting, the surface metal base color is uniform and there is no oxygen residue, which has obvious technical advantages and cost advantages.

[0003] However, in the production application of high-pressure water jet sandblasting to clean metal plates, in order to meet the production requirements of wide steel plates, the production line equipment is generally large, and the steel plates of different widths that need to be cleaned on the production line are also diverse. The equipment usually cannot use mechanical adjustment to meet the cleaning requirements of steel plates of different widths. Therefore, during the cleaning process, and in order to clean comprehensively, the cleaning nozzles are usually all opened to meet the cleaning requirements of steel plates of different widths. However, because all the cleaning nozzles are opened, when cleaning narrow steel plates, the sandblasting will cause the equipment itself to be damaged, causing the equipment to frequently require repair and maintenance, resulting in additional economic losses and greatly shortening the service life of the equipment. In addition, empty sandblasting also causes energy waste. Summary of the invention

[0004] The present invention provides a high-pressure water jet sandblasting cleaning control system and method based on the width of metal plates, so as to solve the problem that the existing high-pressure water jet sandblasting cleaning metal plate production line cannot meet the cleaning requirements of metal plates of different widths through mechanical adjustment.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] In a first aspect, the present invention provides a high-pressure water jet sandblasting cleaning control system based on the width of a metal plate, comprising a central processing unit, a cleaning station, a conveying device, a sand valve control module, a high-pressure water supply control module, a flushing control module and an abrasive supply recovery module, wherein the high-pressure water supply control module comprises a high-pressure pump, the flushing control module comprises a low-pressure flushing pump and a low-pressure flushing valve, the abrasive supply recovery module comprises an abrasive tank, a water replenishment pump, a water replenishment valve, a sand extractor, a sand pump and a sand pump valve, the cleaning station comprises a plurality of cleaning boxes, cleaning nozzles with fixed spacing are arranged in the cleaning boxes, each cleaning box is responsible for cleaning different width intervals along the width direction of the conveying device, and cleaning nozzles are arranged in each cleaning box along the width direction of the conveying device and cover the width interval that the cleaning box is responsible for cleaning;

[0007] The central processor receives a width signal of the metal sheet, determines the opening number of the sand supply valve according to the width signal, determines the opening number of the high-pressure pump according to the opening number of the sand supply valve, sends a high-pressure water supply control signal to the high-pressure water supply module based on the opening number of the high-pressure pump, and the high-pressure water supply control module receives the high-pressure water supply control signal from the central processor and adjusts the opening number of the high-pressure pump according to the high-pressure water supply control signal;

[0008] The central processor determines the number of openings of the abrasive tank and the sand pump according to the number of openings of the sand supply valve, determines the number of openings of the low-pressure flushing pump, the low-pressure flushing valve, the water replenishment pump and the water replenishment valve according to the number of openings of the abrasive tank, and determines the number of openings of the sand pump and the sand pumping valve according to the number of openings of the sand pump;

[0009] The central processor sends a flushing control signal to the flushing control module based on the number of openings of the low-pressure flushing pump and the low-pressure flushing valve, and sends an abrasive supply recovery control signal to the abrasive supply recovery module based on the number of openings of the abrasive tank, the water replenishment pump, the water replenishment valve, the sand pump, the sand pump and the sand pumping valve;

[0010] The central processor sends a sand valve control signal to the sand valve control module based on the opening quantity of the sand supply valve, and the sand valve control module receives the sand valve control signal from the central processor and adjusts the opening quantity of the sand supply valve according to the sand valve control signal;

[0011] Each of the sand supply valves is connected to at least one cleaning nozzle, and each of the sand supply valves is connected to a corresponding number of cleaning nozzles in sequence from one side to the other side along the width direction of the conveyor belt;

[0012] The opening quantity of the sand supply valve is calculated by the following formula:

[0013] ;

[0014] in Indicates the number of openings of the sand supply valve; Indicates rounding up; Indicates the width of the metal sheet; Indicates the fixed spacing of the cleaning nozzles on the production line. Indicates the number of cleaning nozzles connected to a single sand supply valve.

[0015] As the unit with the most abrasive-related settings in the high-pressure water jet sandblasting control system, the sand supply valve can match metal plates of different widths more accurately. The sand supply valve can directly determine the opening status of the corresponding equipment (such as abrasive tanks, sand extractors, sand pumps, etc.), and the corresponding equipment often corresponds to multiple sand supply valves. After determining other equipment, the precise number of sand supply valves must be determined. Directly determining the number of sand supply valves simplifies the steps and can more accurately match the various conditions required for metal plates of different widths, avoiding empty hitting of equipment while also reducing energy consumption.

[0016] Further, the flushing control module receives a flushing control signal from the central processing unit, and adjusts the opening quantity of the low-pressure flushing pump and the low-pressure flushing valve according to the flushing control signal;

[0017] The abrasive supply recovery module receives an abrasive supply recovery control signal from the central processing unit, and adjusts the opening quantity of the sand pump, the abrasive tank, the water supply pump, the sand pump, the water supply valve and the sand pump valve according to the abrasive supply recovery control signal;

[0018] Every 4 cleaning boxes correspond to 1 low-pressure flushing pump and 1 water replenishment pump, every 2 cleaning boxes correspond to 1 sand extraction pump, and every 1 cleaning box corresponds to 1 low-pressure flushing valve, 8 sand extractors, 1 abrasive tank, 2 water replenishment valves, 8 sand extraction valves, and 48 sand supply valves.

[0019] Furthermore, the conveying device includes a feeding section, a cleaning section, a feeding section and a conveying control module, and the feeding section, the cleaning section and the feeding section are all provided with conveying rollers;

[0020] The central processing unit receives the length signal of the metal sheet, generates the speed signal of the conveying control module according to the length signal, and transmits the speed signal to the conveying control module; at the same time, generates the high-pressure water supply pressure signal according to the length signal, and transmits the high-pressure water supply pressure signal to the high-pressure water supply control module;

[0021] The conveying control module receives the speed signal and controls the rotation speed of the conveying roller based on the speed signal;

[0022] The high-pressure water supply control module receives the high-pressure water supply pressure signal and controls the high-pressure water supply pressure of the high-pressure pump based on the high-pressure water supply pressure signal;

[0023] The generation of the high-pressure water supply pressure signal according to the length signal is expressed by the following formula:

[0024] ;

[0025] in, Indicates the pressure value corresponding to the high-pressure water supply pressure signal, in units of ; Indicates the minimum pressure value allowed for cleaning metal sheets, in units of ; represents the empirical constant; Indicates the length of the metal sheet in units of ; express The corresponding maximum length of the cleaned metal sheet is in ,when Less than hour, .

[0026] Furthermore, a side guide mechanism is provided at the entrance of each cleaning box of the cleaning section of the conveying device, and a servo telescopic rod is provided in the side guide mechanism. The central processor obtains the position information of the metal sheet and controls the movement of the servo telescopic rod provided in the side guide mechanism, so that the metal sheet moves forward close to one side of the conveying roller during the cleaning and conveying process.

[0027] Furthermore, the sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module are all provided with a control station;

[0028] The central processing unit is connected with the sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module through a switch in a star network topology connection mode;

[0029] The central processing unit sends control signals to the control stations in the sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module through the switch.

[0030] In a second aspect, the present invention provides a control method for a production line of high-pressure water jet sandblasting for cleaning metal plates, which is applied to the high-pressure water jet sandblasting control system based on the width of the metal plate described above, and the control method comprises the following steps:

[0031] Step 1: The central processing unit receives the width signal and length signal of the metal plate, determines the number of sand supply valves to be opened according to the width signal, determines the number of high-pressure pumps, abrasive tanks, and sand extractors to be opened according to the number of sand supply valves to be opened, determines the number of low-pressure flushing pumps, low-pressure flushing valves, water replenishment pumps, and water replenishment valves to be opened according to the number of abrasive tanks to be opened, determines the number of sand extraction pumps and sand extraction valves to be opened according to the number of sand extractors to be opened, generates a speed signal and a high-pressure water supply pressure signal according to the length signal, and the central processing unit sequentially opens the abrasive supply recovery module, the high-pressure water supply control module, the flushing control module, and the conveying control module and a sand valve control module, and sends a sand valve control signal to the sand valve control module based on the number of openings of the sand supply valve, sends a high-pressure water supply control signal to the high-pressure water supply control module based on the number of openings of the high-pressure pump, sends a flushing control signal to the flushing control module based on the number of openings of the low-pressure flushing pump and the low-pressure flushing valve, sends an abrasive supply recovery control signal to the abrasive supply recovery module based on the number of openings of the abrasive tank, the water replenishment pump, the water replenishment valve, the sand pump, the sand pump and the sand pumping valve, transmits the speed signal to the conveying control module, and transmits the high-pressure water supply water pressure signal to the high-pressure water supply control module, and prepares to clean the metal plate;

[0032] Step 2: The sand valve control module receives the sand valve control signal from the central processing unit, and adjusts the opening quantity of the sand supply valve according to the sand valve control signal. The high-pressure water supply control module receives the high-pressure water supply control signal and the high-pressure water supply pressure signal from the central processing unit, and adjusts the opening quantity of the high-pressure pump according to the high-pressure water supply control signal, and adjusts the water supply pressure of the high-pressure pump according to the high-pressure water supply pressure signal. The flushing control module receives the flushing control signal from the central processing unit, and adjusts the opening quantity of the low-pressure flushing pump and the low-pressure flushing valve according to the flushing control signal. The abrasive supply recovery module receives the abrasive supply recovery control signal from the central processing unit, and adjusts the opening quantity of the sand pump, the abrasive tank, the water supply pump, the sand pump, the water supply valve and the sand pump according to the abrasive supply recovery control signal. The conveying control module receives the speed signal, and controls the rotation speed of the conveying roller based on the speed signal. The side guide mechanism at the entrance of the metal sheet conveyed to the cleaning section pushes the metal sheet to one side, so that the metal sheet moves close to one side of the conveying roller, and starts to perform sandblasting cleaning of the metal sheet;

[0033] Step 3: Stop transporting the metal sheet, the central processor closes the sand valve control module, and sequentially closes the conveying control module, the flushing control module, the high-pressure water supply control module and the abrasive supply recovery module to complete the cleaning of the metal sheet.

[0034] Furthermore, the central processor collects the high-pressure water supply water pressure signal of the water supply port and the length signal of the metal plate to perform fault judgment;

[0035] When the high-pressure water supply water pressure signal satisfies the predetermined water pressure interval of the high-pressure pump operating frequency set corresponding to the length signal, it is determined that no fault has occurred;

[0036] When the water supply pressure signal does not satisfy the predetermined water pressure interval of the high-pressure pump operating frequency set corresponding to the length signal, it is determined that a fault occurs.

[0037] Beneficial effects:

[0038] The high-pressure water jet sandblasting cleaning control system and method based on the width of the metal plate provided by the present invention automatically configures the number of sand supply valves to be opened by collecting the width signal of the metal plate, and further determines the number of high-pressure pumps, sand extractors, sand pumps, and sand extraction valves to be opened based on the number of sand supply valves to be opened. Compared with the dry shot blasting and wet shot blasting technologies that can only adopt one production mode for production, energy saving and consumption reduction of the production line are achieved. Moreover, based on the corresponding relationship between the sand supply valve and the cleaning nozzle, after determining the number of sand supply valves to be opened, the number of cleaning nozzles to be opened and the cleaning width direction are also determined, thereby avoiding equipment blasting without operation. This has significant advantages in terms of equipment protection and energy saving and consumption reduction of the production line.

[0039] The present invention further achieves energy saving and consumption reduction by determining the opening numbers of the abrasive tank, the water supply pump, the water supply valve, the low-pressure flushing pump and the low-pressure flushing valve based on the opening number of the sand supply valve.

[0040] The present invention divides the huge control system into multiple control parts, making the control system more concise and clear;

[0041] The present invention also collects the length signal of the metal plate to automatically configure the speed signal, realizes the speed control of the conveying control module, and further determines the water pressure of the high-pressure pump based on the speed signal, so that the cleaning speed and pressure of metal plates of different lengths can be flexibly adjusted when performing the cleaning work, thereby realizing efficient cleaning of metal plates of different specifications and models, and avoiding the equipment from running empty due to the large gap between the plates with shorter cleaning lengths caused by the fixed feeding speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the module structure of a high-pressure water jet sandblasting cleaning control system based on the width of a metal plate according to an embodiment of the present invention;

[0043] Figure 2 A top view of a cleaning station of a high-pressure water jet sandblasting cleaning control system based on the width of a metal plate according to an embodiment of the present invention;

[0044] Figure 3 This is a cross-sectional view of a single cleaning box of a high-pressure water jet sandblasting cleaning control system based on the width of a metal sheet according to an embodiment of the present invention. (It should be noted that Figure 2 and Figure 3In the figure, there are 48 sand supply valves and cleaning nozzles corresponding to a single cleaning box. Based on the effective display of each equipment, not all sand supply valves and cleaning nozzles are shown in the figure).

[0045] In the figure:

[0046] 1. Cleaning box; 2. Sand supply valve; 3. Cleaning nozzle; 4. Abrasive tank; 5. Water supply valve; 6. Low-pressure flushing valve; 7. Sand pump; 8. Sand extraction valve; 9. Conveying roller; 10. High-pressure pump; 11. Sand extraction pump; 12. Water supply pump; 13. Low-pressure flushing pump. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0049] See also Figure 1-3 The embodiment of the present application provides a high-pressure water jet sandblasting cleaning control system based on the width of the metal plate, including a central processing unit, a cleaning station, a conveying device, a sand valve control module, an abrasive supply recovery module, a high-pressure water supply control module and a flushing control module, the high-pressure water supply control module includes a high-pressure pump 10, the flushing control module includes a low-pressure flushing pump 13 and a low-pressure flushing valve 6, the abrasive supply recovery module includes a sand pump 7, a sand pump 11, a sand pump valve 8, an abrasive tank 4, a water replenishment pump 12 and a water replenishment valve 5, the cleaning station includes a plurality of cleaning boxes 1, cleaning nozzles 3 with fixed spacing are arranged in the cleaning box 1, each cleaning box 1 is responsible for cleaning different width intervals along the width direction of the conveying device, and cleaning nozzles 3 are arranged in each cleaning box 1 along the width direction of the conveying device and cover the width interval that the cleaning box 1 is responsible for cleaning;

[0050] The central processing unit receives the width signal of the metal sheet, determines the opening number of the sand supply valve 2 according to the width signal, and sends a sand valve control signal to the sand valve control module based on the opening number of the sand supply valve 2. The sand valve control module receives the sand valve control signal from the central processing unit and adjusts the opening number of the sand supply valve 2 according to the sand valve control signal.

[0051] In this embodiment, a single sand supply valve 2 is connected to a corresponding cleaning nozzle 3, and each sand supply valve 2 is connected to the corresponding cleaning nozzle 3 in sequence from one side to the other side along the width direction of the conveyor belt. In other embodiments, a single sand supply valve 2 can be connected to multiple cleaning nozzles 3, as long as the same number of cleaning nozzles 3 are connected in sequence along the width direction of the conveyor belt.

[0052] The opening quantity of the sand supply valve 2 is determined according to the width signal combined with the fixed spacing of the cleaning nozzle 3;

[0053] The opening quantity of the sand supply valve 2 is calculated by the following formula:

[0054] ;

[0055] in Indicates the number of openings of the sand supply valve 2; Indicates rounding up; Indicates the width of the metal sheet; Indicates the fixed spacing of the cleaning nozzles 3 on the production line, Indicates the number of cleaning nozzles 3 connected to a single sand supply valve 2.

[0056] The central processor determines the opening number of the high-pressure pump 10 according to the opening number of the sand supply valve 2, and the central processor sends a high-pressure water supply control signal to the high-pressure water supply module based on the opening number of the high-pressure pump 10;

[0057] The high-pressure water supply control module receives a high-pressure water supply control signal from the central processing unit, and adjusts the opening quantity of the high-pressure pump 10 according to the high-pressure water supply control signal.

[0058] The central processing unit determines the number of openings of the abrasive tank 4 and the sand pump 7 according to the number of openings of the sand supply valve 2, determines the number of openings of the low-pressure flushing pump 13, the low-pressure flushing valve 6, the water supply pump 12 and the water supply valve 5 according to the number of openings of the abrasive tank 4, and determines the number of openings of the sand pump 11 and the sand pumping valve 8 according to the number of openings of the sand pump 7;

[0059] The central processing unit sends a flushing control signal to the flushing control module based on the number of openings of the low-pressure flushing pump 13 and the low-pressure flushing valve 6, and sends an abrasive supply and recovery control signal to the abrasive supply and recovery module based on the number of openings of the abrasive tank 4, the water replenishment pump 12, the water replenishment valve 5, the sand pump 7, the sand pump 11 and the sand pumping valve 8.

[0060] Specifically, in the present embodiment, every two cleaning boxes 1 correspond to a sand extraction pump 11, every four cleaning boxes 1 correspond to a water replenishment pump 12 and a low-pressure flushing pump 13, and each cleaning box 1 corresponds to an abrasive tank 4, two high-pressure pumps 10, two water replenishment valves 5, a low-pressure flushing valve 6, eight sand extractors 7, eight sand extraction valves 8, forty-eight sand supply valves 2, and forty-eight cleaning nozzles 3.

[0061] Based on that the cleaning box 1 and the cleaning nozzles 3 in the cleaning box 1 are arranged along the width direction of the conveyor belt, the cleaning boxes 1 in different intervals are responsible for cleaning areas of different widths. After loading metal sheets of different widths, the number of sand supply valves 2 to be opened is determined according to the width of the metal sheets. The sand supply valves 2 and the cleaning nozzles 3 are one-to-one corresponding, so the number of corresponding cleaning nozzles 3 to be opened is determined. Based on the number of sand supply valves 2 to be opened, the number of high-pressure pumps 10, low-pressure flushing pumps 13, low-pressure flushing valves 6, sand extractors 7, abrasive tanks 4, water replenishment pumps 12, sand extraction pumps 11, water replenishment valves 5 and sand extraction valves 8 to be opened corresponding to the metal sheets of this width is determined to achieve the effect of energy saving and consumption reduction.

[0062] When the width of the metal sheet is and Please refer to Table 1, and the corresponding devices to be turned on are shown in Table 1;

[0063] Table 1: Metal sheet width , Open device comparison table

[0064]

[0065] In this embodiment, one sand supply valve 2 corresponds to one cleaning nozzle 3, and the fixed spacing of the cleaning nozzles 3 is , when the feeding width is Sheet Metal Afterwards, according to the sand supply valve 2 confirmation formula of the present invention, it can be calculated that the number of sand supply valves 2 opened is 64. The central processing unit sends a sand valve control signal to the sand valve control module based on the fact that the number of sand supply valves 2 opened is 64. The sand valve control module opens 64 sand supply valves 2 according to the sand valve control signal. Based on the correspondence between the sand supply valves 2 and the high-pressure pumps 10, 1 high-pressure pump 10 corresponds to 24 sand supply valves 2. It can be known that 3 high-pressure pumps 10 are opened, and 1 abrasive tank corresponds to 48 sand supply valves 2. Therefore, two abrasive tanks 4 should be opened, otherwise the abrasive will not be enough. The corresponding number of subsequent equipment opened can be obtained according to the corresponding quantity relationship.

[0066] In this embodiment, the conveying device includes a conveying control module, the central processing unit receives the length signal of the metal sheet, generates a speed signal of the conveying control module according to the length signal, and transmits the speed signal to the conveying control module; at the same time, it generates a high-pressure water supply pressure signal according to the speed signal, and transmits the high-pressure water supply pressure signal to the high-pressure water supply control module;

[0067] The conveying control module receives the speed signal and controls the rotation speed of the conveying roller 9 based on the speed signal;

[0068] The high-pressure water supply control module receives the high-pressure water supply pressure signal and controls the high-pressure water supply pressure of the high-pressure pump 10 based on the high-pressure water supply pressure signal.

[0069] The high-pressure water supply pressure signal generated according to the length signal is expressed by the following formula:

[0070] ;

[0071] in, Indicates the pressure value corresponding to the high-pressure water supply pressure signal, in units of ; Indicates the minimum pressure value allowed for cleaning metal sheets, in units of ; represents the empirical constant; Indicates the length of the metal sheet in units of ; express The corresponding maximum length of the cleaned metal sheet is in ,when Less than hour, .

[0072] The conveying device includes a feeding section, a cleaning section and a feeding section, and each of the feeding section, the cleaning section and the feeding section is provided with a conveying roller 9;

[0073] A side guide mechanism is also provided at the entrance of each cleaning box 1 in the cleaning section of the conveying control module. A servo telescopic rod is provided in the side guide mechanism. The central processing unit obtains the position information of the metal sheet and controls the movement of the servo telescopic rod provided in the side guide mechanism, so that the metal sheet moves forward close to one side of the conveying roller 9 during the conveying process.

[0074] The production line is equipped with several side guide units and side guide servo motors. Each side guide servo motor is equipped with an independent control station. The control and parameter reading of each side guide unit are completed through the corresponding servo motor control station. The metal sheet position detection includes AD module, I / O module, photoelectric detection switch, and proximity switch. A photoelectric detection switch or proximity switch is installed at intervals on the 9 conveyor rollers of the production line. Photoelectric detection switches or proximity switches are installed at the inlet and outlet of each cleaning box 1 and flushing box.

[0075] The sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module are all provided with control stations;

[0076] Specifically, the conveying control module includes a conveying roller 9 inverter control station, a side guide servo motor control station, and a metal sheet position detection. The metal sheet conveying system includes a number of conveying rollers 9, and the conveying rollers 9 can adopt a single-roller single-frequency conversion (single-roller single-motor single-frequency converter) transmission mode, or all conveying rollers 9 can be divided into several groups according to a certain number of rollers per group, and each group uses a frequency converter and a motor, and a sprocket drives multiple conveying rollers 9 in the group. Each conveying roller 9 inverter is an independent control station, and the speed control and electrical parameter reading of the conveying roller 9 are completed through the frequency converter control station, thereby realizing the control of the metal sheet conveying.

[0077] The sand valve control module is composed of a single or multiple sand supply valve 2 control stations. The number of sand supply valve 2 control stations depends on the number of cleaning boxes 1. Each cleaning box 1 is provided with a sand supply valve 2 control station. The sand supply valve 2 control station includes an interface unit, an I / O unit, a solenoid valve and a sand supply valve 2. The I / O unit outputs a control signal to the solenoid valve, and the solenoid valve operates to control the opening and closing of the sand supply valve 2. Each solenoid valve corresponds to a sand supply valve 2, and each sand supply valve 2 corresponds to a cleaning nozzle 3. Each cleaning box 1 of the production line contains 48 cleaning nozzles 3.

[0078] The high-pressure water supply control module includes a high-pressure pump 10 inverter control station, high-pressure pump 10 outlet water pressure monitoring, high-pressure pump 10 oil temperature monitoring, and high-pressure pump 10 oil pressure monitoring. The entire production line contains multiple high-pressure pumps 10, each of which is equipped with a frequency converter. Each high-pressure pump 10 frequency converter is an independent control station. The control and electrical parameter reading of the high-pressure pump 10 are completed through the frequency converter control station, thereby realizing the control of the high-pressure water supply. The high-pressure pump 10 outlet water pressure monitoring, high-pressure pump 10 oil temperature monitoring, and high-pressure pump 10 oil pressure monitoring include AD modules and monitoring sensors. Each high-pressure pump 10 is equipped with outlet water pressure, oil temperature, and oil pressure sensors.

[0079] The flushing control module includes a low-pressure flushing pump 13 inverter control station, a low-pressure flushing valve 6 control station, a high-pressure flushing pump inverter control station, a low-pressure flushing pump 13 outlet water pressure monitoring station, and a high-pressure flushing pump outlet water pressure monitoring station. Both the low-pressure flushing pump 13 and the high-pressure flushing pump are equipped with inverters, and their control and electrical parameter reading are completed through the corresponding low-pressure or high-pressure flushing pump inverter control station. The low-pressure flushing pump 13 is used to punch the metal sheets cleaned in the cleaning box 1, and the high-pressure flushing pump is used to high-pressure flush the metal sheets passing through the flushing box;

[0080] The low-pressure flushing valve 6 control station includes an interface unit, an I / O unit, a solenoid valve, and a pneumatic low-pressure flushing valve 6. The I / O unit outputs a control signal to the solenoid valve, and the solenoid valve operates to control the opening and closing of the pneumatic low-pressure flushing valve 6. Each solenoid valve corresponds to a pneumatic low-pressure flushing valve 6. The flushing pipeline of each cleaning box 1 on the production line is equipped with an independent pneumatic low-pressure flushing valve 6. The low-pressure flushing pump 13 outlet water pressure monitoring includes an AD unit and a water pressure sensor. Two water pressure sensors are set at the outlet of the low-pressure flushing pump 13, one of which is dedicated to constant pressure control, and the other monitors the outlet water pressure. A water pressure sensor is set at the outlet of the high-pressure flushing pump.

[0081] The abrasive supply recovery module also includes an overflow box. The central processing unit collects the overflow box liquid level signal in the overflow box, and stably adjusts and sorts and recovers the liquid level and abrasive in the overflow box according to the overflow box liquid level signal.

[0082] The abrasive supply and recovery module includes a sand pump 11 inverter control station, a water supply pump 12 inverter control station, a sand pump and water supply valve 5 control station, a swirl separation slurry pump inverter control station, an overflow pump and abrasive screening motor control station, a sand pump 11 outlet water pressure monitoring, a water supply pump 12 outlet water pressure monitoring, overflow tank liquid level monitoring, and abrasive weight monitoring. Each sand pump 11, water supply pump 12, and swirl separation slurry pump is equipped with a frequency converter separately, and each frequency converter is an independent control station. The control of the corresponding water pump and the reading of electrical parameters are completed through the frequency converter control station. The production line includes multiple sand pumps 11 and swirl separation slurry pumps. Usually, two cleaning boxes 1 are equipped with a sand pump 11, each cleaning box 1 is designed with an overflow box, and each overflow box is equipped with a swirl separation slurry pump. The control station of the sand pumping and water replenishing valve 5 includes an interface unit, an I / O unit, a solenoid valve, a pneumatic sand pumping valve 8, and a pneumatic water replenishing valve 5. The control signal is output to the solenoid valve through the I / O unit. The solenoid valve operates to control the opening and closing of the pneumatic sand pumping valve 8 and the water replenishing valve 5. Each solenoid valve corresponds to a pneumatic sand pumping valve 8 or a pneumatic water replenishing valve 5. A number of sand pumping pipelines and sand pumps 7 are designed at the lower end of each cleaning box 1 of the production line. Each sand pumping pipeline is equipped with an independent pneumatic sand pumping valve 8. Similarly, each water replenishing pipeline of each cleaning box 1 is also equipped with an independent pneumatic water replenishing valve 5. The overflow pump and abrasive screening motor control station includes an interface unit, an I / O unit, an intermediate relay, and a contactor, which are responsible for controlling the operation of the overflow pump and the abrasive screening motor. The overflow box of each cleaning box 1 of the production line is equipped with an overflow pump, and each cleaning box 1 has an abrasive tank 4 at the upper end, and an abrasive screening motor is configured above each abrasive tank 4.

[0083] The outlet water pressure monitoring of the sand pump 11, the outlet water pressure monitoring of the water supply pump 12, and the liquid level monitoring of the overflow tank include an AD unit, an I / O unit, a water pressure sensor, a liquid level sensor, and a float switch. Two water pressure sensors are set at the outlets of the sand pump 11 and the water supply pump 12, one of which is used for constant pressure control, and the other monitors the outlet water pressure. The overflow tank uses a liquid level sensor and a float switch to monitor and control its liquid level;

[0084] It also includes abrasive weight monitoring. A set of weighing sensors are installed at the bottom of each abrasive tank 4 to monitor the weight of the abrasive in the tank. The central processing unit determines whether the production conditions are met based on the weight signal sent back by the weighing sensor.

[0085] Production conditions include general non-satisfaction of production conditions and emergency non-satisfaction of production conditions;

[0086] During the cleaning process of metal plates, if the general production conditions are not met, the loading section stops loading the plates, and the metal plates in the cleaning section continue to be cleaned. If the production conditions are not met urgently, the loading section stops loading the plates, and the cleaning of the metal plates in the cleaning section stops;

[0087] When the metal sheet to be cleaned in the loading section is being replaced, the conveying roller 9 is not loaded with the sheet, all the sand supply valves 2 are closed, and the production line enters the energy-saving mode;

[0088] When the width and length of the metal sheet to be cleaned are changed compared with the previous batch, the width signal and length signal are automatically obtained online after the previous batch is cleaned and reconfigured for cleaning.

[0089] In this system, a water circulation control module is also provided, in which a clean water tank is provided, and a central processing unit collects a clean water tank liquid level signal in the clean water tank, and stably adjusts the liquid level in the clean water tank according to the clean water tank liquid level signal;

[0090] Specifically, the water circulation control module sets up a sewage circulation treatment control station, which includes a sewage circulation treatment water pump motor control unit, a sewage filter air valve control unit, a sewage filter water pressure monitoring unit, and a clean water tank liquid level monitoring unit.

[0091] The sewage circulation treatment water pump motor control unit includes an interface unit, an I / O unit, an intermediate relay, and a contactor, which are responsible for controlling the operation of the sewage pump and the backwash pump motor. The sewage circulation treatment system includes several sewage filters, each of which is equipped with a backwash pump. All sewage filters are grouped according to a certain number of groups, and each group of sewage filters shares a sewage pump. The sewage filter air valve control unit includes an I / O unit, a solenoid valve, and a pneumatic valve. The I / O unit outputs a control signal to the solenoid valve, and the solenoid valve operates to control the opening and closing of the pneumatic valve. Each solenoid valve corresponds to a pneumatic valve. Several pneumatic valves are configured on each sewage filter, and the working conditions of the sewage filter are switched by controlling the action of the pneumatic valve. The sewage filter water pressure monitoring and clean water tank liquid level monitoring include an AD unit, an I / O unit, a water pressure sensor, a liquid level sensor, and a float switch. A water pressure sensor is installed on each sewage filter, and the clean water tank uses a liquid level sensor and a float switch to monitor and control its liquid level.

[0092] In this embodiment, a maintenance management module is also provided, and the maintenance management module includes an engineer station, a host computer human-machine interface control station, a remote operation station, and a local operation station. The engineer station is used by professional engineers to perform maintenance management, software and hardware configuration, control program modification, program operation monitoring, and system testing on the control system. The host computer human-machine interface control station is composed of a computer and configuration software, and is set in the central control room for operators to use. It has functions such as control, parameter and function setting, monitoring display, alarm display, and historical data storage. The remote operation station is composed of an operating console, an interface unit, an I / O unit, a button, an indicator light, and an alarm. It is set in the central control room and is used to start and stop the system with one button, handle emergencies, and provide alarm prompts. The local operation station is composed of a field operation box, an interface unit, an I / O unit, a button, an indicator light, and a switch. It is installed next to the production line equipment and is mainly used for jog testing during equipment commissioning and maintenance, and the remote / local switching function of the relevant equipment is set.

[0093] In this embodiment, based on the multiple control station settings of the present invention and the large equipment of the high-pressure water jet sandblasting cleaning control system, a field bus control method is adopted, the central processing unit and each control station are connected by optical fiber or network cable, industrial Ethernet is used for communication, a switch station is set, and a star network topology connection method is applied. The control station is installed next to the corresponding equipment of the production line according to the factory conditions, and each control station and the corresponding control execution element or sensor detection element are connected by cable. Through such a networking method, not only the huge control system becomes more concise, but also a large amount of cable cost and installation workload can be saved. In addition, the central processing unit also exchanges data with the secondary machine, the tertiary machine and other production line equipment in the factory through the industrial Ethernet method, adopts the general control method, and the central processing unit and each control module are controlled by block hierarchical control and sequential control methods, which overcomes the problems of multiple control points and complex control process, and realizes the intelligent operation of production line equipment.

[0094] In this embodiment, the number of opened sand supply valves 2, high-pressure pumps 10, low-pressure flushing pumps 13, low-pressure flushing valves 6, sand pumps 7, abrasive tanks 4, water replenishment valves 5, water replenishment pumps 12, sand pumps 11 and sand pumping valves 8 is determined according to the width signal, and the cleaning speed of the conveying control module and the pump operating frequency of the high-pressure pump 10 are determined according to the length signal.

[0095] In other embodiments, different cleaning modes and formulas can be set based on the length and width of common models of metal plates. Specifically, the number of high-pressure pumps 10, low-pressure flushing pumps 13, low-pressure flushing valves 6, sand extractors 7, abrasive tanks 4, water replenishment valves 5, water replenishment pumps 12, sand pumps 11 and sand pumps 8 turned on in each production mode is fixed, and the number of pumps and valves turned on in different production modes is different. The number of sand supply valves 2 turned on is determined according to the width, and then the production mode is determined based on the number of sand supply valves 2 turned on. The number of sand supply valves 2 turned on corresponds to a production mode within a range, and each formula corresponds to a formula program of metal plate length-cleaning speed-high-pressure pump 10 operating frequency-high-pressure water supply pressure. The central processing unit matches the corresponding formula operation according to the length and material of the metal plate to be cleaned.

[0096] The present application also provides a method for controlling the high-pressure water jet sandblasting cleaning of the width of a metal plate, which is applied to the high-pressure water jet sandblasting cleaning control system of the width of the metal plate. The control method includes the following steps:

[0097] Step 1: The central processing unit receives the width signal and length signal of the metal plate, determines the opening number of the sand supply valve 2 according to the width signal, determines the opening number of the high-pressure pump 10, the abrasive tank 4, and the sand pump 7 according to the opening number of the sand supply valve 2, determines the opening number of the low-pressure flushing pump 13, the low-pressure flushing valve 6, the water supply pump 12, and the water supply valve 5 according to the opening number of the abrasive tank 4, determines the opening number of the sand pump 11 and the sand pump valve 8 according to the opening number of the sand pump 7, generates a speed signal and a high-pressure water supply pressure signal according to the length signal, and the central processing unit starts the abrasive supply recovery module, the high-pressure water supply control module, the flushing control module, and the conveying control module in sequence. Block and sand valve control module, and send sand valve control signal to the sand valve control module based on the opening number of sand supply valve 2, send high-pressure water supply control signal to the high-pressure water supply control module based on the opening number of high-pressure pump 10, send flushing control signal to the flushing control module based on the opening number of low-pressure flushing pump 13 and low-pressure flushing valve 6, send abrasive supply recovery control signal to the abrasive supply recovery module based on the opening number of abrasive tank 4, water replenishment pump 12, water replenishment valve 5, sand pump 7, sand pump 11 and sand pumping valve 8, transmit speed signal to the conveying control module, transmit high-pressure water supply water pressure signal to the high-pressure water supply control module, and prepare to clean the metal plate;

[0098] Step 2: The sand valve control module receives the sand valve control signal from the central processing unit, and adjusts the opening quantity of the sand supply valve 2 according to the sand valve control signal. The high-pressure water supply control module receives the high-pressure water supply control signal and the high-pressure water supply pressure signal from the central processing unit, and adjusts the opening quantity of the high-pressure pump 10 according to the high-pressure water supply control signal, and adjusts the water supply pressure of the high-pressure pump 10 according to the high-pressure water supply pressure signal. The flushing control module receives the flushing control signal from the central processing unit, and adjusts the opening quantity of the low-pressure flushing pump 13 and the low-pressure flushing valve 6 according to the flushing control signal. The abrasive supply recovery module receives the abrasive supply recovery control signal from the central processing unit, and adjusts the opening quantity of the sand pump 7, the abrasive tank 4, the water supply pump 12, the sand pump 11, the water supply valve 5 and the sand pump 8 according to the abrasive supply recovery control signal. The conveying control module receives the speed signal, and controls the rotation speed of the conveying roller 9 based on the speed signal. The side guide mechanism at the entrance of the metal sheet conveyed to the cleaning section pushes the metal sheet to one side, so that the metal sheet moves close to one side of the conveying roller 9, and the sandblasting cleaning of the metal sheet begins.

[0099] Step 3: Stop transporting the metal sheet, the central processor closes the sand valve control module, and sequentially closes the conveying control module, the flushing control module, the high-pressure water supply control module and the abrasive supply recovery module to complete the cleaning of the metal sheet.

[0100] Based on the above detailed description of the preferred specific embodiments of the present invention, it should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A high-pressure water jet sandblasting cleaning control system based on the width of a metal plate, comprising a central processing unit, a cleaning station, a conveying device, a sand valve control module, a high-pressure water supply control module, a flushing control module and an abrasive supply recovery module, wherein the high-pressure water supply control module comprises a high-pressure pump (10), the flushing control module comprises a low-pressure flushing pump (13) and a low-pressure flushing valve (6), the abrasive supply recovery module comprises an abrasive tank (4), a water replenishment pump (12), a water replenishment valve (5), a sand pump (7), a sand pump (11) and a sand pump valve (8), characterized in that: The cleaning station comprises a plurality of cleaning boxes (1), wherein cleaning nozzles (3) are arranged at fixed intervals in the cleaning boxes (1), and each cleaning box (1) is responsible for cleaning different width intervals along the width direction of the conveying device. The cleaning nozzles (3) are arranged in each cleaning box (1) along the width direction of the conveying device and cover the width interval that the cleaning box (1) is responsible for cleaning; The central processor receives a width signal of the metal plate, determines the number of times the sand supply valve (2) is opened according to the width signal, determines the number of times the high-pressure pump (10) is opened according to the number of times the sand supply valve (2) is opened, sends a high-pressure water supply control signal to the high-pressure water supply module based on the number of times the high-pressure pump (10) is opened, receives the high-pressure water supply control signal from the central processor, and adjusts the number of times the high-pressure pump (10) is opened according to the high-pressure water supply control signal; The central processing unit determines the number of abrasive tanks (4) and sand pumps (7) to be opened according to the number of sand supply valves (2) to be opened, determines the number of low-pressure flushing pumps (13), low-pressure flushing valves (6), water replenishment pumps (12) and water replenishment valves (5) to be opened according to the number of abrasive tanks (4) to be opened, and determines the number of sand pumps (11) and sand pumps (8) to be opened according to the number of sand pumps (7) to be opened; The central processing unit sends a flushing control signal to the flushing control module based on the number of openings of the low-pressure flushing pump (13) and the low-pressure flushing valve (6), and sends an abrasive supply recovery control signal to the abrasive supply recovery module based on the number of openings of the abrasive tank (4), the water replenishment pump (12), the water replenishment valve (5), the sand pump (7), the sand pump (11) and the sand pump valve (8); The central processor sends a sand valve control signal to the sand valve control module based on the opening number of the sand supply valve (2); the sand valve control module receives the sand valve control signal from the central processor and adjusts the opening number of the sand supply valve (2) according to the sand valve control signal; Each of the sand supply valves (2) is connected to at least one cleaning nozzle (3), and each of the sand supply valves (2) is connected to a corresponding number of cleaning nozzles (3) in sequence from one side to the other side along the width direction of the conveyor belt; The opening number of the sand supply valve (2) is calculated by the following formula: ； in Indicates the number of times the sand supply valve (2) is opened; Indicates rounding up; Indicates the width of the metal sheet; Indicates the fixed spacing of the cleaning nozzles (3) on the production line, Indicates the number of cleaning nozzles (3) connected to a single sand supply valve (2).

2. The high-pressure water jet sandblasting cleaning control system based on the width of the metal sheet according to claim 1, characterized in that: The flushing control module receives a flushing control signal from the central processing unit, and adjusts the opening quantity of the low-pressure flushing pump (13) and the low-pressure flushing valve (6) according to the flushing control signal; The abrasive supply recovery module receives an abrasive supply recovery control signal from a central processing unit, and adjusts the opening quantity of the sand pump (7), the abrasive tank (4), the water replenishment pump (12), the sand pump (11), the water replenishment valve (5) and the sand pump (8) according to the abrasive supply recovery control signal; Every four cleaning boxes (1) correspond to one low-pressure flushing pump (13) and one water replenishment pump (12), every two cleaning boxes (1) correspond to one sand extraction pump (11), and every one cleaning box (1) corresponds to one low-pressure flushing valve (6), eight sand extractors (7), one abrasive tank (4), two water replenishment valves (5), eight sand extraction valves (8), and 48 sand supply valves (2).

3. The high-pressure water jet sandblasting cleaning control system based on the width of the metal sheet according to any one of claims 1-2, characterized in that: The conveying device comprises a feeding section, a cleaning section, a feeding section and a conveying control module, and the feeding section, the cleaning section and the feeding section are all provided with conveying rollers (9); The central processing unit receives the length signal of the metal sheet, generates the speed signal of the conveying control module according to the length signal, and transmits the speed signal to the conveying control module; at the same time, generates the high-pressure water supply pressure signal according to the length signal, and transmits the high-pressure water supply pressure signal to the high-pressure water supply control module; The conveying control module receives the speed signal and controls the rotation speed of the conveying roller (9) based on the speed signal; The high-pressure water supply control module receives the high-pressure water supply pressure signal and controls the high-pressure water supply pressure of the high-pressure pump (10) based on the high-pressure water supply pressure signal; The generation of the high-pressure water supply pressure signal according to the length signal is expressed by the following formula: ； in, Indicates the pressure value corresponding to the high-pressure water supply pressure signal, in units of ; Indicates the minimum pressure value allowed for cleaning metal sheets, in units of ; represents an empirical constant; Indicates the length of the metal sheet in units of ; express The corresponding maximum length of the cleaned metal sheet is in ,when Less than hour, .

4. The high-pressure water jet sandblasting cleaning control system based on the width of the metal sheet according to claim 3, characterized in that: A side guide mechanism is provided at the entrance of each cleaning box (1) of the cleaning section of the conveying device, and a servo telescopic rod is provided in the side guide mechanism. The central processor obtains the position information of the metal sheet and controls the movement of the servo telescopic rod provided in the side guide mechanism, so that the metal sheet moves forward close to one side of the conveying roller (9) during the cleaning and conveying process.

5. The high-pressure water jet sandblasting cleaning control system based on the width of the metal sheet according to claim 4, characterized in that: The sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module are all provided with a control station; The central processing unit is connected with the sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module through a switch in a star network topology connection mode; The central processing unit sends control signals to the control stations in the sand valve control module, the high-pressure water supply control module, the flushing control module, the abrasive supply recovery module and the conveying control module through the switch.

6. A high-pressure water jet sandblasting cleaning control method based on the width of a metal sheet, characterized in that: Applicable to the high-pressure water jet sandblasting cleaning control system based on the width of the metal plate as described in claim 5, the control method comprises the following steps: Step 1: The central processing unit receives a width signal and a length signal of the metal plate, determines the number of openings of the sand supply valve (2) according to the width signal, determines the number of openings of the high-pressure pump (10), the abrasive tank (4), and the sand extractor (7) according to the number of openings of the sand supply valve (2), determines the number of openings of the low-pressure flushing pump (13), the low-pressure flushing valve (6), the water supply pump (12), and the water supply valve (5) according to the number of openings of the abrasive tank (4), determines the number of openings of the sand extraction pump (11) and the sand extraction valve (8) according to the number of openings of the sand extractor (7), generates a speed signal and a high-pressure water supply pressure signal according to the length signal, and the central processing unit sequentially activates the abrasive supply recovery module, the high-pressure water supply control module, the flushing control module, the output control module, and the output control module. The sand delivery control module and the sand valve control module are configured to transmit a sand valve control signal to the sand valve control module based on the number of openings of the sand supply valve (2), transmit a high-pressure water supply control signal to the high-pressure water supply control module based on the number of openings of the high-pressure pump (10), transmit a flushing control signal to the flushing control module based on the number of openings of the low-pressure flushing pump (13) and the low-pressure flushing valve (6), transmit an abrasive supply recovery control signal to the abrasive supply recovery module based on the number of openings of the abrasive tank (4), the water replenishment pump (12), the water replenishment valve (5), the sand pump (7), the sand pump (11) and the sand pumping valve (8), transmit a speed signal to the delivery control module, and transmit a high-pressure water supply water pressure signal to the high-pressure water supply control module, so as to prepare to clean the metal plate; Step 2: The sand valve control module receives the sand valve control signal from the central processing unit, and adjusts the opening number of the sand supply valve (2) according to the sand valve control signal. The high-pressure water supply control module receives the high-pressure water supply control signal and the high-pressure water supply pressure signal from the central processing unit, and adjusts the opening number of the high-pressure pump (10) according to the high-pressure water supply control signal, and adjusts the water supply pressure of the high-pressure pump (10) according to the high-pressure water supply pressure signal. The flushing control module receives the flushing control signal from the central processing unit, and adjusts the opening number of the low-pressure flushing pump (13) and the low-pressure flushing valve (6) according to the flushing control signal. The abrasive supply recovery module receives an abrasive supply recovery control signal from the central processing unit, and adjusts the opening quantity of the sand pump (7), the abrasive tank (4), the water supply pump (12), the sand pump (11), the water supply valve (5) and the sand pump (8) according to the abrasive supply recovery control signal. The conveying control module receives a speed signal and controls the rotation speed of the conveying roller (9) based on the speed signal. When the metal sheet is conveyed to the entrance of the cleaning section, the side guide mechanism pushes the metal sheet to one side, so that the metal sheet moves close to one side of the conveying roller (9), and the sandblasting cleaning of the metal sheet begins. Step 3: Stop transporting the metal sheet, the central processor closes the sand valve control module, and sequentially closes the conveying control module, the flushing control module, the high-pressure water supply control module and the abrasive supply recovery module to complete the cleaning of the metal sheet.

7. The high-pressure water jet sandblasting cleaning control method based on the width of the metal plate according to claim 6, characterized in that: The central processing unit collects the high-pressure water supply water pressure signal of the water supply port and the length signal of the metal plate to perform fault judgment; When the high-pressure water supply water pressure signal satisfies a predetermined water pressure interval of the high-pressure pump (10) operating frequency set corresponding to the length signal, it is determined that no fault has occurred; When the water supply pressure signal does not satisfy a predetermined water pressure interval of the operating frequency of the high-pressure pump (10) set corresponding to the length signal, it is determined that a fault has occurred.

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