Roll bending hydraulic system of six-roll hydraulic rolling mill and combination design method of valve blocks of roll bending hydraulic system

Abstract

The invention provides a roll bending hydraulic system of a six-roll hydraulic rolling mill and a combined design method of valve blocks of the roll bending hydraulic system, and relates to the technical field of hydraulic systems.The hydraulic system comprises a middle roll bending control loop and a working roll bending loop set which are sequentially arranged; the oil inlet ends of the middle roll bending control loop and the working roll bending loop group are respectively connected with the first oil path, and the oil outlet ends of the middle roll bending control loop and the working roll bending loop group are respectively connected with the second oil path; the working roll bending loop group comprises a working roll operation side bending roll positive bending control loop, a working roll operation side bending roll negative bending control loop, a working roll transmission side bending roll positive bending control loop and a working roll transmission side bending roll negative bending control loop which are connected in parallel and are independently arranged. In the invention, the complex hydraulic system is subdivided into a plurality of simple loop combinations according to functions, each simple loop is designed into an independent valve group, and then each independent valve group is combined to form the hydraulic system, so that the simple design of the valve group of the complex hydraulic system is realized, and the maintenance and repair are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems, and in particular to a combined design method of a six-roller hydraulic rolling mill bending roll hydraulic system and a valve block thereof. Background Art

[0002] The six-roller hydraulic rolling mill is an advanced rolling mill equipment. The six-roller hydraulic rolling mill is used for rolling copper strips and copper foils. The comprehensive rigidity of the rolling mill is relatively high, which is conducive to the precision control of the pattern of strips and foils. At the same time, the requirements for the equipment are also improved. Among them, the bending roll control (including: positive and negative bending of the intermediate roll, positive and negative bending of the working roll) and the twitching control of the intermediate roll are one of the important factors affecting the pattern.

[0003] With the development of three-dimensional drawing technology (such as SolidWorks, etc.), it is possible to design complex hydraulic system valve block manifolds. However, complex hydraulic system and valve block design make the system maintenance requirements higher and higher, which is not conducive to the user's later use and maintenance, especially the complex valve group of cartridge valve combination, the valve block design and processing are very complicated, and if there is no detailed hydraulic principle diagram and valve block diagram, even experienced hydraulic engineers will find it very difficult to find it during later maintenance or overhaul of problems, which is not conducive to the later maintenance or overhaul of hydraulic systems. Summary of the invention

[0004] The present invention provides a combined design method of a six-roller hydraulic rolling mill bending roll hydraulic system and a valve block thereof, which is used to solve the technical problem that the current hydraulic system is relatively complex and is not conducive to the later maintenance or overhaul of the hydraulic system.

[0005] In order to solve the above technical problems, the present invention discloses a six-roll hydraulic rolling mill bending hydraulic system, comprising: an intermediate roll bending control circuit and a working roll bending circuit group arranged in sequence, the oil inlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the first oil circuit, the oil outlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the second oil circuit, and the working roll bending circuit group comprises a working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll transmission side bending roll positive bending control circuit and a working roll transmission side bending roll negative bending control circuit that are arranged in parallel and independently.

[0006] Preferably, a filter is provided at the input end of the first oil circuit, a first one-way valve is provided on the first oil circuit, a pressure gauge is provided between the first one-way valve and the filter, and a second one-way valve is provided at the output end of the second oil circuit.

[0007] Preferably, the intermediate roll bending control circuit includes a first jet tube servo valve, a first electromagnetic reversing valve and a first overflow valve connected in sequence, a first pressure measuring joint is arranged between the first jet tube servo valve and the first electromagnetic reversing valve, and a first pressure sensor is arranged on the first pressure measuring joint.

[0008] Preferably, the working roll operating side bending roll positive bending control circuit includes a second jet tube servo valve, a second electromagnetic reversing valve and a second overflow valve connected in sequence, a second pressure measuring joint is arranged between the second jet tube servo valve and the second electromagnetic reversing valve, and a second pressure sensor is arranged on the second pressure measuring joint.

[0009] Preferably, the negative bending control circuit of the working roll operating side bending roll includes a third jet tube servo valve, a third electromagnetic reversing valve and a third overflow valve connected in sequence, a third pressure measuring joint is arranged between the third jet tube servo valve and the third electromagnetic reversing valve, and a third pressure sensor is arranged on the third pressure measuring joint.

[0010] Preferably, the working roll drive side bending roll positive bending control circuit includes a fourth jet tube servo valve, a fourth electromagnetic reversing valve and a fourth overflow valve connected in sequence, a fourth pressure measuring joint is arranged between the fourth jet tube servo valve and the fourth electromagnetic reversing valve, and a fourth pressure sensor is arranged on the fourth pressure measuring joint.

[0011] Preferably, the negative bending control circuit of the working roll driving side bending roll includes a fifth jet tube servo valve, a fifth electromagnetic reversing valve and a fifth overflow valve connected in sequence, a fifth pressure measuring joint is arranged between the fifth jet tube servo valve and the fifth electromagnetic reversing valve, and a fifth pressure sensor is arranged on the fifth pressure measuring joint.

[0012] A combination design method for a valve block of a six-roll hydraulic rolling mill bending roll hydraulic system includes preparing multiple valve blocks, constructing an intermediate roll bending roll control circuit, a working roll operating side bending roll positive bending roll control circuit, a working roll operating side bending roll negative bending roll control circuit, a working roll drive side bending roll positive bending roll control circuit and a working roll drive side bending roll negative bending roll control circuit on different valve blocks, thereby designing them into independent valve groups, and then combining the independent valve groups to complete the combination design of the valve blocks.

[0013] Preferably, the valve block is mounted on the mounting plate via a connecting mechanism.

[0014] Preferably, the connecting mechanism includes a base, a cavity is arranged in the base, a plurality of vacuum suction cups are arranged at the bottom of the base, the upper ends of the vacuum suction cups are connected to the cavity through connecting holes, an air pump is arranged outside the base, the input end of the air pump extends into the cavity and an air extraction pipe is arranged.

[0015] The technical solution of the present invention has the following advantages: The present invention provides a combination design method of a six-roll hydraulic rolling mill bending roll hydraulic system and its valve block, which relates to the technical field of hydraulic systems. The hydraulic system includes an intermediate roll bending roll control circuit and a working roll bending roll circuit group which are arranged in sequence. The oil inlet ends of the intermediate roll bending roll control circuit and the working roll bending roll circuit group are respectively connected to the first oil circuit, and the oil outlet ends of the intermediate roll bending roll control circuit and the working roll bending roll circuit group are respectively connected to the second oil circuit. The working roll bending roll circuit group includes a parallel and independently arranged working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll transmission side bending roll positive bending control circuit, and a working roll transmission side bending roll negative bending control circuit. In the present invention, the complex hydraulic system is subdivided into a plurality of simple circuit combinations according to the function, each simple circuit is designed into an independent valve group, and then the independent valve groups are combined to form a hydraulic system, so as to realize the simplified design of the valve group of the complex hydraulic system, which is convenient for the later users to maintain and repair the hydraulic system.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a hydraulic system for bending rolls of a six-roll hydraulic rolling mill according to the present invention;

[0020] Figure 2 This is the principle diagram of the oil source circuit of the present invention;

[0021] Figure 3 This is a schematic diagram of the intermediate roll bending control circuit of the present invention;

[0022] Figure 4 This is a schematic diagram of the working roll bending circuit of the present invention;

[0023] Figure 5 This is a schematic diagram of the oil source circuit valve group of the present invention;

[0024] Figure 6 This is a schematic diagram of the valve group of the intermediate roll bending control circuit of the present invention;

[0025] Figure 7This is a schematic diagram of a valve group for a working roll bending circuit of the present invention;

[0026] Figure 8 It is a schematic diagram of the combination of the oil source circuit valve group, the intermediate roll bending control circuit valve group, and the work roll bending circuit valve group of the present invention;

[0027] Fig. 9 It is a schematic diagram of the connection mechanism in the present invention;

[0028] Fig.10 For the present invention Fig. 9 A magnified view of the structure at center;

[0029] Fig.11 A bottom view of the base in the present invention;

[0030] Fig.12 It is a top view of the blocking plate in the present invention.

[0031] In the figure: 1, filter; 2.1, first one-way valve; 2.2, second one-way valve; 3.1, first jet tube servo valve; 3.2, second jet tube servo valve; 3.3, third jet tube servo valve; 3.4, fourth jet tube servo valve; 3.5, fifth jet tube servo valve; 4.1, pressure gauge; 5.1, first pressure measuring joint; 5.2, second pressure measuring joint; 5.3, third pressure measuring joint; 5.4, fourth pressure measuring joint; 5.5, fifth pressure measuring joint; 6.1, first pressure sensor; 6.2, second pressure sensor; 6.3, third pressure sensor; 6.4, fourth pressure sensor; 6.5, fifth pressure sensor; 7, first Solenoid reversing valve; 8, first relief valve; 9.1, second solenoid reversing valve; 9.2, third solenoid reversing valve; 9.3, fourth solenoid reversing valve; 9.4, fifth solenoid reversing valve; 10.1, second relief valve; 10.2, third relief valve; 10.3, fourth relief valve; 10.4, fifth relief valve; 11, base; 12, vacuum suction cup; 13, connecting hole; 14, vacuum pump; 15, vacuum pipe; 16, first rotating shaft; 17, horizontal partition; 18, driving chamber; 19, vacuum chamber; 20, first gear; 21, second rotating shaft; 22, second gear; 23, fixing cylinder; 24, blade; 25, connecting pipe; 26, blocking plate. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Example 1

[0035] The embodiment of the present invention provides a six-roller hydraulic rolling mill roll bending hydraulic system, such as Figure 1-Figure 8 As shown, it includes: an intermediate roll bending control circuit and a working roll bending circuit group which are arranged in sequence, the oil inlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the first oil circuit, the oil outlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the second oil circuit, and the working roll bending circuit group includes a working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll driving side bending roll positive bending control circuit and a working roll driving side bending roll negative bending control circuit which are arranged in parallel and independently.

[0036] The working principle and beneficial effects of the above technical scheme are as follows: the working roll bending roll circuit group includes four circuit combinations that are connected in parallel and independently arranged, and the four circuit combinations are respectively a working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll transmission side bending roll positive bending control circuit and a working roll transmission side bending roll negative bending control circuit, wherein the working roll operating side bending roll positive bending control circuit is used to control the operating side bending roll positive bending, the working roll operating side bending roll negative bending control circuit is used to control the operating side bending roll negative bending, the working roll transmission side bending roll positive bending control circuit is used to control the transmission side bending roll positive bending, and the working roll transmission side bending roll negative bending control circuit is used to control the transmission side bending roll negative bending. Through the above scheme, the bending force of the working rolls on the operating side and the transmission side can be controlled separately, and the complex hydraulic system is subdivided into multiple simple circuit combinations according to function. Each simple circuit is designed as an independent valve group, and then the independent valve groups are combined to form a hydraulic system, thereby realizing the simplified design of the valve group of the complex hydraulic system, which is convenient for later users to maintain and overhaul the hydraulic system.

[0037] Example 2

[0038] On the basis of the above-mentioned embodiment 1, Figure 1-Figure 8As shown, a filter 1 is arranged at the input end of the first oil circuit, a first one-way valve 2.1 is arranged on the first oil circuit, a pressure gauge 4.1 is arranged between the first one-way valve 2.1 and the filter 1, and a second one-way valve 2.2 is arranged at the output end of the second oil circuit;

[0039] The intermediate roll bending control circuit comprises a first jet pipe servo valve 3.1, a first electromagnetic reversing valve 7 and a first overflow valve 8 which are connected in sequence, a first pressure measuring joint 5.1 is arranged between the first jet pipe servo valve 3.1 and the first electromagnetic reversing valve 7, and a first pressure sensor 6.1 is arranged on the first pressure measuring joint 5.1;

[0040] The working roll operation side bending roll positive bending control circuit comprises a second jet pipe servo valve 3.2, a second electromagnetic reversing valve 9.1 and a second overflow valve 10.1 which are connected in sequence, a second pressure measuring joint 5.2 is arranged between the second jet pipe servo valve 3.2 and the second electromagnetic reversing valve 9.1, and a second pressure sensor 6.2 is arranged on the second pressure measuring joint 5.2;

[0041] The negative bending control circuit of the side bending roll in the working roll operation includes a third jet pipe servo valve 3.3, a third electromagnetic reversing valve 9.2 and a third overflow valve 10.2 which are connected in sequence. A third pressure measuring joint 5.3 is arranged between the third jet pipe servo valve 3.3 and the third electromagnetic reversing valve 9.2, and a third pressure sensor 6.3 is arranged on the third pressure measuring joint 5.3.

[0042] The positive bending control circuit of the bending roll on the driving side of the working roll comprises a fourth jet pipe servo valve 3.4, a fourth electromagnetic reversing valve 9.3 and a fourth overflow valve 10.3 which are connected in sequence, a fourth pressure measuring joint 5.4 is arranged between the fourth jet pipe servo valve 3.4 and the fourth electromagnetic reversing valve 9.3, and a fourth pressure sensor 6.4 is arranged on the fourth pressure measuring joint 5.4;

[0043] The negative bending control circuit of the bending roll on the driving side of the working roll comprises a fifth jet tube servo valve 3.5, a fifth electromagnetic reversing valve 9.4 and a fifth overflow valve 10.4 which are connected in sequence. A fifth pressure measuring joint 5.5 is arranged between the fifth jet tube servo valve 3.5 and the fifth electromagnetic reversing valve 9.4, and a fifth pressure sensor 6.5 is arranged on the fifth pressure measuring joint 5.5.

[0044] The working principle and beneficial effects of the above technical solution are as follows: Figure 2 and Figure 5 As shown, it is a schematic diagram of the oil source circuit of the present invention. The oil enters the first oil circuit after being filtered by the filter 1, and provides oil for the intermediate roll bending control circuit and the four groups of working roll bending circuits, and flows back to the second oil circuit after passing through each circuit;

[0045] like Figure 1 , Figure 3 , Figure 6As shown, the intermediate roll bending control circuit includes the first jet tube servo valve 3.1, the first electromagnetic reversing valve 7, the first overflow valve 8, the first pressure measuring joint 5.1, and the first pressure sensor 6.1. When bending, 2YA of the first electromagnetic reversing valve 7 is energized, the PLC control system gives a first preset pressure value, the servo control system provides the first preset current for the first jet tube servo valve 3.1, the first jet tube servo valve 3.1 outputs pressure oil into the rodless cavity of the intermediate roll bending cylinder through the first electromagnetic reversing valve 7, and the pressure of the rodless cavity is detected by the first pressure sensor 6.1. Then it is fed back to the PLC control system to form a pressure closed-loop control; during negative bending, 1YA of the first electromagnetic reversing valve 7 is energized, the PLC control system gives a second preset pressure value, and the servo control system provides a second preset current for the first jet tube servo valve 3.1. The first jet tube servo valve 3.1 outputs pressure oil that enters the rod chamber of the intermediate roll bending cylinder through the first electromagnetic reversing valve 7, and the pressure of the rod chamber is detected by the first pressure sensor 6.1, and then fed back to the PLC control system to form a pressure closed-loop control. The PLC control system adopts the conventional control system of the existing hydraulic system.

[0046] The servo valves in the above-mentioned intermediate roll bending control circuit, working roll operating side bending roll positive bending control circuit, working roll operating side bending roll negative bending control circuit, working roll drive side bending roll positive bending control circuit and working roll drive side bending roll negative bending control circuit all use jet tube servo valves, which can improve the anti-pollution ability.

[0047] Regarding the working roll bending circuit group, such as Figure 1 , Figure 4 , Figure 7As shown, the positive bending control circuit of the bending roll on the working roll operating side includes a second jet pipe servo valve 3.2, a second electromagnetic reversing valve 9.1 and a second overflow valve 10.1 connected in sequence; the negative bending control circuit of the bending roll on the working roll operating side includes a third jet pipe servo valve 3.3, a third electromagnetic reversing valve 9.2 and a third overflow valve 10.2 connected in sequence; the positive bending control circuit of the bending roll on the working roll driving side includes a fourth jet pipe servo valve 3.4, a fourth electromagnetic reversing valve 9.3 and a fourth overflow valve 10.3 connected in sequence; the negative bending control circuit of the bending roll on the working roll driving side includes a fifth jet pipe servo valve 3.5, a fifth electromagnetic reversing valve 9.6 and a fourth overflow valve 10.7 connected in sequence. The pressure control of the bending roll on the working roll operation side is controlled by the positive bending cylinder and the negative bending cylinder on the operating side, and the pressure of the bending roll on the driving side of the working roll is controlled by the positive bending cylinder and the negative bending cylinder on the driving side. The bending roll cylinder adopts the offset top form (the special structure of the ear shaft of the working roll bearing seat), and the bending force is equal to the pressure difference of the bending roll cylinder on the top. When positive bending control is required, the pressure of the positive bending cylinder is controlled to be greater than the pressure of the negative bending cylinder. When negative bending control is required, the pressure of the positive bending cylinder is controlled to be less than the pressure of the negative bending cylinder. When switching between positive and negative bending, the pressure of the positive bending cylinder and the pressure of the negative bending cylinder increase or decrease as needed (continuous change), and there is no sudden change in pressure change. When positive bending, the pressure of the positive bending cylinder plays a major role, and the pressure of the negative bending cylinder plays a back pressure and damping role. At this time, the pressure of the negative bending cylinder is very small, and unnecessary internal friction is minimized as much as possible; when negative bending, the pressure of the negative bending cylinder plays a major role, and the pressure of the positive bending cylinder plays a back pressure and damping role. At this time, the pressure of the positive bending cylinder is very small, and unnecessary internal friction is minimized as much as possible. The pressure sensor of each branch circuit detects the corresponding bending roller cylinder pressure, and the pressure closed-loop control is realized through the PLC control system and servo valve.

[0048] The present invention also discloses a combination design method of a valve block of a six-roll hydraulic rolling mill bending roll hydraulic system, comprising preparing a plurality of valve blocks, and constructing an intermediate roll bending roll control circuit, a working roll operating side bending roll positive bending roll control circuit, a working roll operating side bending roll negative bending roll control circuit, a working roll drive side bending roll positive bending roll control circuit and a working roll drive side bending roll negative bending roll control circuit on different valve blocks, thereby designing them into independent valve groups, and then combining the independent valve groups to complete the combination design of the valve blocks.

[0049] The working principle and beneficial effects of the above technical solution are as follows: the intermediate roll bending control circuit, the working roll operating side bending roll positive bending control circuit, the working roll operating side bending roll negative bending control circuit, the working roll drive side bending roll positive bending control circuit and the working roll drive side bending roll negative bending control circuit are respectively arranged in different valve blocks, and the complex hydraulic system is subdivided into a plurality of simple circuit combinations according to the function, each simple circuit is designed as an independent valve group, and then the independent valve groups are combined to form a hydraulic system (such as Figure 8 As shown), the simplified design of the complex hydraulic system valve group is realized. Compared with the traditional valve block design, the above scheme is simple in design and convenient for later maintenance and repair.

[0050] Based on an embodiment, Figure 8 , Fig. 9 As shown, the valve block is mounted on the mounting plate through a connecting mechanism;

[0051] The connecting mechanism includes a base 11, a cavity is set in the base 11, a plurality of vacuum suction cups 12 are set at the bottom of the base 11, the upper ends of the vacuum suction cups 12 are connected to the cavity through connecting holes 13, an air pump 14 is set outside the base 11, the input end of the air pump 14 extends into the cavity and an air extraction pipe 15 is set.

[0052] The working principle and beneficial effects of the above technical solution are as follows: the base 11 is fixedly connected to the bottom of the valve block, the area of ​​the base 11 is smaller than the bottom area of ​​the valve block, and multiple groups of bases 11 can be provided. During installation, the valve block is placed on the mounting plate, and the vacuum suction cup 12 is adsorbed on the upper surface of the mounting plate, and then the vacuum pump 14 is started. The vacuum pump 14 extracts the air in the cavity, so that the vacuum suction cup 12 is tightly adsorbed on the mounting plate, thereby realizing the quick installation of the valve block, facilitating the installation of the valve block at different positions of the mounting plate, and facilitating the disassembly and assembly of the valve block, providing convenience for the maintenance and inspection of the valve block.

[0053] Based on an embodiment, Figure 9-12 As shown, a valve is arranged on the air extraction pipe 15, a controller is arranged outside the base 11, the air extraction pump 14 and the valve are electrically connected to the controller respectively, a first rotating shaft 16 is arranged at the center of the cavity, and the upper and lower ends of the first rotating shaft 16 are respectively rotatably connected to the inner wall of the cavity, a horizontal partition 17 is arranged in the cavity, and the horizontal partition 17 divides the cavity from top to bottom into a driving cavity 18 and an air extraction cavity 19, the first rotating shaft 16 is rotatably connected to the center of the horizontal partition 17, a first gear 20 is arranged on the first rotating shaft 16, the first gear 20 is located in the driving cavity 18, a second rotating shaft 21 is arranged in the driving cavity 18, the lower end of the second rotating shaft 21 is rotatably connected to the horizontal partition 17, a second gear 22 is arranged on the second rotating shaft 21, the second gear 22 is meshed with the first gear 20, a fixing cylinder 23 is arranged above the second gear 22, and the fixing cylinder 2 3 is fixedly connected to the top wall of the cavity, the upper end of the second rotating shaft 21 extends into the fixed cylinder 23 and is provided with a plurality of blades 24, and the plurality of blades 24 are distributed in a circular array about the axis of the second rotating shaft 21, the exhaust pipe 15 is located in the driving cavity 18, one end of the exhaust pipe 15 is communicated with the side wall of the fixed cylinder 23, a connecting pipe 25 is arranged on the side of the fixed cylinder 23 away from the exhaust pipe 15, one end of the connecting pipe 25 is communicated with the side wall of the fixed cylinder 23, and the other end of the connecting pipe 25 passes through the horizontal partition 17 and is communicated with the exhaust cavity 19, two blocking plates 26 are symmetrically arranged near the lower end of the first rotating shaft 16, the lower surface of the blocking plate 26 is in contact with the bottom wall of the exhaust cavity 19, the blocking plate 26 is used to block the connecting hole 13, and the two blocking plates 26 are in a fan-shaped structure, an air pressure sensor is arranged in the exhaust cavity 19, and the air pressure sensor is electrically connected to the controller.

[0054] The working principle and beneficial effects of the above technical solution are as follows: in order to improve the stability of the valve block, a horizontal partition 17 is arranged in the cavity, and an air extraction cavity 19 is arranged below the horizontal partition 17. The horizontal partition 17 improves the sealing performance of the air extraction cavity 19. During installation, the vacuum suction cup 12 is placed on the mounting plate, and the air extraction pump 14 is started. The air extraction pump 14 extracts the gas in the fixed cylinder 23 through the air extraction pipe 15, and then the air in the vacuum suction cup 12 enters the air extraction cavity 19 through the connecting hole 13, and then flows into the fixed cylinder 23 through the connecting pipe 25, and then is extracted by the air extraction pump 14, so that the air pressure in the vacuum suction cup 12 is reduced. The air pressure sensor is used to detect the air pressure value in the air extraction chamber 19. When the air pressure value in the air extraction chamber 19 reaches the preset air pressure range, the controller controls the air extraction pump 14 to stop working and controls the valve to close. Then, after waiting for a preset time, the air pressure sensor detects the air pressure value in the air extraction chamber 19 again. When the air pressure value in the air extraction chamber 19 is within the preset air pressure range, the valve block is installed. When the air pressure value in the air extraction chamber 19 is not within the preset air pressure range, it means that some vacuum suction cups 12 are not tightly attached to the mounting plate and there is a problem of air leakage. At this time, the controller controls the valve and the air extraction pump 14 to open, and the air extraction pump 14 The gas in the air extraction chamber 19 continues to be extracted until the air pressure value in the air extraction chamber 19 reaches the preset air pressure range. After waiting for the preset time, when the air pressure value in the air extraction chamber 19 is still within the preset air pressure range, the valve block is installed. During the gas extraction process, the air flow flows in the fixed cylinder 23 and drives the blade 24 to rotate. The blade 24 drives the second rotating shaft 21 to rotate. The rotation of the second rotating shaft 21 drives the second gear 22 to rotate. The rotation of the second gear 22 drives the first gear 20 to rotate. The rotation of the first gear 20 drives the first rotating shaft 16 to rotate. The rotation of the first rotating shaft 16 drives the two blocking plates 26 to rotate. By moving, the two blocking plates 26 can change the blocking position of the connecting hole 13. When the surface of the mounting plate is uneven or part of the vacuum suction cup 12 is damaged and leaks, the position of the blocking plate 26 is automatically adjusted through the above scheme, so that the vacuum suction cup 12 with leakage does not perform adsorption work, thereby ensuring that the vacuum suction cup 12 at the unblocked connecting hole 13 can be tightly adsorbed on the mounting plate, and the air pressure value in the suction chamber 19 can always be maintained within the preset air pressure range without leakage, thereby improving the stability of the valve block installation, facilitating the flexible disassembly and assembly of the valve block, and facilitating the user's later maintenance and repair.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

[0058] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A six-high hydraulic rolling mill roll bending hydraulic system, characterized in that: include: An intermediate roll bending control circuit and a working roll bending circuit group are arranged in sequence, the oil inlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the first oil circuit, the oil outlet ends of the intermediate roll bending control circuit and the working roll bending circuit group are respectively connected to the second oil circuit, and the working roll bending circuit group includes a working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll driving side bending roll positive bending control circuit and a working roll driving side bending roll negative bending control circuit which are arranged in parallel and independently.

2. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: A filter (1) is arranged at the input end of the first oil circuit, a first one-way valve (2.1) is arranged on the first oil circuit, a pressure gauge (4.1) is arranged between the first one-way valve (2.1) and the filter (1), and a second one-way valve (2.2) is arranged at the output end of the second oil circuit.

3. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: The intermediate roll bending control circuit comprises a first jet tube servo valve (3.1), a first electromagnetic reversing valve (7) and a first overflow valve (8) which are connected in sequence, a first pressure measuring joint (5.1) is arranged between the first jet tube servo valve (3.1) and the first electromagnetic reversing valve (7), and a first pressure sensor (6.1) is arranged on the first pressure measuring joint (5.1).

4. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: The working roll operation side bending roll positive bending control circuit comprises a second jet tube servo valve (3.2), a second electromagnetic reversing valve (9.1) and a second overflow valve (10.1) which are connected in sequence, a second pressure measuring joint (5.2) is arranged between the second jet tube servo valve (3.2) and the second electromagnetic reversing valve (9.1), and a second pressure sensor (6.2) is arranged on the second pressure measuring joint (5.2).

5. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: The negative bending control circuit of the side bending roll operated by the working roll comprises a third jet pipe servo valve (3.3), a third electromagnetic reversing valve (9.2) and a third overflow valve (10.2) which are connected in sequence, a third pressure measuring joint (5.3) is arranged between the third jet pipe servo valve (3.3) and the third electromagnetic reversing valve (9.2), and a third pressure sensor (6.3) is arranged on the third pressure measuring joint (5.3).

6. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: The working roll driving side bending roll positive bending control circuit comprises a fourth jet pipe servo valve (3.4), a fourth electromagnetic reversing valve (9.3) and a fourth overflow valve (10.3) which are connected in sequence, a fourth pressure measuring joint (5.4) is arranged between the fourth jet pipe servo valve (3.4) and the fourth electromagnetic reversing valve (9.3), and a fourth pressure sensor (6.4) is arranged on the fourth pressure measuring joint (5.4).

7. A six-high hydraulic rolling mill roll bending hydraulic system according to claim 1, characterized in that: The negative bending control circuit of the bending roll on the driving side of the working roll comprises a fifth jet pipe servo valve (3.5), a fifth electromagnetic reversing valve (9.4) and a fifth overflow valve (10.4) which are connected in sequence, a fifth pressure measuring joint (5.5) is arranged between the fifth jet pipe servo valve (3.5) and the fifth electromagnetic reversing valve (9.4), and a fifth pressure sensor (6.5) is arranged on the fifth pressure measuring joint (5.5).

8. A method for designing a valve block combination of a six-high hydraulic rolling mill bending roll hydraulic system as claimed in any one of claims 1 to 7, characterized in that: The method includes preparing multiple valve blocks, constructing an intermediate roll bending control circuit, a working roll operating side bending roll positive bending control circuit, a working roll operating side bending roll negative bending control circuit, a working roll drive side bending roll positive bending control circuit and a working roll drive side bending roll negative bending control circuit on different valve blocks, thereby designing them into independent valve groups, and then combining the independent valve groups to complete the combined design of the valve blocks.

9. The method for designing a valve block combination of a six-high hydraulic rolling mill roll bending hydraulic system according to claim 8, characterized in that: The valve block is mounted on the mounting plate through a connecting mechanism.

10. The method for designing a valve block combination of a six-high hydraulic rolling mill roll bending hydraulic system according to claim 9, characterized in that: The connection mechanism comprises a base (11), a cavity is arranged in the base (11), a plurality of vacuum suction cups (12) are arranged at the bottom of the base (11), the upper ends of the vacuum suction cups (12) are connected to the cavity through a connecting hole (13), an air pump (14) is arranged outside the base (11), an input end of the air pump (14) extends into the cavity and is provided with an air extraction pipe (15).

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