Rolling mill bending roll block assembly and rolling mill

Abstract

A rolling mill bending roll block assembly and a rolling mill relate to the technical field of rolling mills, comprising a bending roll block and a transition connection block. The transition connection block is arranged on the bending roll block, and four first bolt holes are arranged on the side of the transition connection block and a first guide channel, a second guide channel, a third guide channel and a fourth guide channel are arranged inside the transition connection block. The four first bolt holes all pass through the transition connection block, and the first guide channel, the second guide channel, the third guide channel and the fourth guide channel are respectively perpendicular to and connected to the four first bolt holes. The present invention can change the method of installing the bending roll block on the operating side, making it simple to install, reducing the failure rate and improving product quality. It increases the operating time, improves the equipment operating rate and reduces its various maintenance costs. The present invention also provides a rolling mill, which has the advantages of low failure rate and long practical life.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mills, and in particular to a rolling mill bending roll block assembly and a rolling mill. Background Art

[0002] The balanced roll bending system of a wide and heavy plate finishing mill performs both work roll balancing and work roll bending. Work roll balancing is used to balance the weight of the work roll assembly, backup rolls, and oil film bearing taper sleeves. It eliminates the gaps between the backup roll journal and bearings, and between the work roll journal and bearings, allowing the work roll and backup roll surfaces to align, generating a pressing force that prevents slippage between the work rolls and backup rolls and eliminates the strong impact vibrations generated during steel biting and casting. Medium and heavy plate mills generally utilize positive roll bending, where the point and direction of the applied force are consistent with the work roll balancing force, differing only in magnitude. The balanced roll bending device employs a hydraulic cylinder positioned between the upper and lower work rolls, applying a roll bending force to the work roll bearing seats to reduce the deflection of the work rolls and the size of the loaded roll gap in the middle, thereby achieving a good plate shape.

[0003] The inventors discovered that all media can be connected to the outside world through two methods: side connection and back connection. On the transmission side, due to the large installation space, the bending roller block uses the side connection method. Each medium in the bending roller block is directly connected to the conveying pipeline using a hose assembly and a conversion joint. This makes installation simple, the installation quality is stable and reliable, and inspection is intuitive and controllable. However, the bending roller block on the operating side also has a working roller locking and roller shifting device installed on the side, so the space is small and operation is difficult. The sealing lip is easily damaged during installation. Moreover, after installation, it is impossible to check whether the seal is damaged in the hole. Only when the medium is conveyed can the integrity and reliability of the seal be determined. If a leak occurs, the bending roller block must be disassembled and reassembled, which takes a long time to replace and the work quality is unstable. After replacement, the service life is also unstable. In some cases, oil leakage has occurred within a week or a month. At the shortest, it has failed within 24 hours after replacement. Summary of the Invention

[0004] The present invention aims to provide a rolling mill bending block assembly and a rolling mill, which can change the method of installing the bending block on the operating side, thereby simplifying installation, reducing the failure rate, improving product quality, increasing operating time, improving equipment operating rate, and reducing various maintenance costs.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In a first aspect, the present invention provides a rolling mill roll bending block assembly, comprising a roll bending block, and further comprising:

[0007] A transition connection block is arranged on the bending roller block, four first bolt holes are arranged on the side of the transition connection block and a first guide channel, a second guide channel, a third guide channel and a fourth guide channel are provided inside the transition connection block, the four first bolt holes all pass through the transition connection block, and the first guide channel, the second guide channel, the third guide channel and the fourth guide channel are respectively connected to the four first bolt holes.

[0008] In an optional embodiment, the bending roller block has a first high-pressure channel, a second high-pressure channel, a third high-pressure channel and a fourth high-pressure channel, and the first high-pressure channel, the second high-pressure channel, the third high-pressure channel and the fourth high-pressure channel are respectively connected to the first guide channel, the second guide channel, the third guide channel and the fourth guide channel.

[0009] In an optional embodiment, the rolling mill bending roll block assembly provided by the present invention also includes four connecting bolts, each of which is provided with a connecting through-hole. The four connecting bolts respectively fix the transition connecting block to the bending roll block through the four first bolt holes, and the four connecting through-holes respectively connect the first high-pressure channel and the first guide channel, the second high-pressure channel and the second guide channel, the third high-pressure channel and the third guide channel, and the fourth high-pressure channel and the fourth guide channel.

[0010] In an optional embodiment, the rolling mill bending roll block assembly provided by the present invention also includes four sealing gaskets, and a sealing platform is provided on one end of the four first bolt holes connected to the bending roll block. The four sealing gaskets are respectively provided on the four sealing platforms and are respectively located in the first high-pressure channel, the second high-pressure channel, the third high-pressure channel and the fourth high-pressure channel.

[0011] In an optional embodiment, the bending roller block also has five low-pressure channels, and five second bolt holes are also provided on the side of the transition connection block. The second bolt holes and the first bolt holes are located on the same side of the transition connection block and both pass through the transition connection block. The five low-pressure channels are respectively connected to the five second bolt holes.

[0012] In an optional embodiment, the rolling mill bending roll block assembly provided by the present invention further includes five mounting bolts, and the five mounting bolts respectively connect the transition connection block and the bending roll block through the five second bolt holes.

[0013] In an optional embodiment, the rolling mill bending roll block assembly provided by the present invention also includes two first conversion joints and two second conversion joints, the second guide channel and the third guide channel are respectively connected to the two first conversion joints, and the first guide channel and the fourth guide channel are respectively connected to the two second conversion joints.

[0014] In an optional embodiment, a chamfer is provided on the transition connection block.

[0015] In an optional embodiment, oil grooves are provided at the connections between the first guide channel, the second guide channel, the third guide channel, and the fourth guide channel and the four first bolt holes.

[0016] In a second aspect, the present invention provides a rolling mill comprising a rolling mill bending roll block assembly as described in any one of the aforementioned embodiments.

[0017] The beneficial effects of the embodiments of the present invention are as follows: on the basis of the existing technology, the present invention adds a transition connection block, which has four guide channels inside, and these four guide channels connect the four high-pressure channels on the bending roller block, changing the previous connection method of the high-pressure channels. Since the transition connection block is fixed to the bending roller block, there is no need to repeatedly disassemble and assemble due to quality problems with the lip seal installation, and the quality of each installation is reliable. At the same time, the method of installing the operating side bending roller block is optimized to make it easier to install. After the transition connection block is installed, the high-pressure channel can be synchronized with the use cycle of the bending roller block, and will not be forced to stop again due to oil leakage. It makes it work reliably, reduces the failure rate, and improves product quality. It increases operating time, improves equipment operating rate, and reduces its various maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of an overall first perspective provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of an overall second viewing angle provided by an embodiment of the present invention;

[0021] Figure 3 A schematic cross-sectional view of a bending roll block provided in an embodiment of the present invention;

[0022] Figure 4 A three-dimensional schematic diagram of a transition connection block provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a transition connection block from a first perspective provided by an embodiment of the present invention;

[0024] Figure 6 The embodiment of the present invention provides Figure 5 Schematic diagram of the middle AA section;

[0025] Figure 7 The embodiment of the present invention provides Figure 5 Schematic diagram of the middle BB section;

[0026] Figure 8 The embodiment of the present invention provides Figure 5 Schematic diagram of the middle CC section;

[0027] Figure 9 A schematic diagram of the bottom surface of a transition connection block provided in an embodiment of the present invention;

[0028] Figure 10 A three-dimensional schematic diagram of a connecting bolt provided in an embodiment of the present invention;

[0029] Figure 11 A schematic diagram of the bottom surface dimensions of the transition connection block provided in an embodiment of the present invention.

[0030] icon:

[0031] 100-bending roller block; 110-first high-pressure channel; 111-second high-pressure channel; 112-third high-pressure channel; 113-fourth high-pressure channel; 120-low-pressure channel; 200-transition connection block; 210-first guide channel; 211-second guide channel; 212-third guide channel; 213-fourth guide channel; 220-first bolt hole; 230-second bolt hole; 240-sealing platform; 250-chamfer; 260-oil groove; 300-connecting bolt; 310-connecting through hole; 400-first conversion joint; 500-second conversion joint. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] Rolling mills, including two-roll, three-roll, and Lauter-type three-roll mills, often require various oils for lubrication and hydraulic functions during operation. These oils are connected to the outside world via side and back connections. Because the rod chamber of the bending block acts as a back pressure, the operating pressure is relatively low at 20 bar, minimizing the likelihood of oil leakage. Even if the rod chamber leaks significantly, the valves on the rod chamber valve station can be closed and the drive-side bending block rod chamber hose assembly can be disassembled. This allows the chamber to vent to the atmosphere, allowing continued operation without requiring a shutdown due to a leak. Therefore, in the first phase, an experiment was conducted to connect the two rodless chamber oil passages on the bending block with specialized, compact rigid piping using 25×4 stainless steel pipes and connectors. These pipes were then connected on the side of the bending block. This intuitive installation location allows for synchronization with the bending block's lifecycle, eliminating the need for mid-cycle shutdowns due to oil leaks. However, space constraints limited the modification of only two pipes. The hydraulic rod chamber still cannot completely eliminate the hidden dangers. Therefore, in order to solve the above problems, this embodiment provides a rolling mill bending block assembly and a rolling mill.

[0039] like Figure 1 and 4 -8, the rolling mill bending roll block assembly provided in this embodiment includes a bending roll block 100 and a transition connection block 200. The transition connection block 200 is arranged on the bending roll block 100. Four first bolt holes 220 are arranged on the side of the transition connection block 200 and the interior thereof has a first guide channel 210, a second guide channel 211, a third guide channel 212 and a fourth guide channel 213. The four first bolt holes 220 all pass through the transition connection block 200, and the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213 are respectively perpendicular to and connected to the four first bolt holes 220. In detail, the entrances of the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213 are all set on the bottom surface of the transition connection block 200. At the same time, the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213 are connected to the high-pressure channel (hydraulic oil channel) on the side of the bending roll block 100, and the high-pressure channel is converted to the lower side of the bending roll block 100. In this way, there is no need to repeatedly disassemble and assemble the archway and the bending roll block 100 due to quality problems of the lip seal installation. Only one installation is required. After installation, the hydraulic oil channel can be synchronized with the service life of the bending roll block 100, and will not be forced to stop again due to oil leakage. It makes it work reliably, reduces the failure rate, and improves product quality. It increases operating time, improves equipment operating rate, and reduces its various maintenance costs.

[0040] Optionally, during the design, it is also necessary to consider that the lower connection port must not interfere with the normal operation of the working roll changing bracket. Therefore, based on the outer dimensions of the balanced bending roll block 100 and the space between it and the working roll locking and roll shifting device, the outer dimensions of the transition connection block 200 are determined to be 140×100×915.

[0041] Specifically, such as Figure 3 As shown, the bending roller block 100 has a first high-pressure channel 110, a second high-pressure channel 111, a third high-pressure channel 112 and a fourth high-pressure channel 113. The first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112 and the fourth high-pressure channel 113 are respectively connected to the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213.

[0042] It can be understood that the first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112 and the fourth high-pressure channel 113 here are respectively connected to the upper cylinder rod chamber, the upper cylinder rodless chamber, the lower cylinder rodless chamber and the lower cylinder rod chamber of the bending roller block 100.

[0043] Specifically, such as Figure 2 and 10 As shown, the rolling mill bending block assembly provided in this embodiment further includes four connecting bolts 300, each of which is provided with a connecting through-hole 310. The four connecting bolts 300 respectively fix the transition connection block 200 to the bending block 100 through the four first bolt holes 220. The four connecting through-holes 310 respectively connect the first high-pressure channel 110 and the first guide channel 210, the second high-pressure channel 111 and the second guide channel 211, the third high-pressure channel 112 and the third guide channel 212, and the fourth high-pressure channel 113 and the fourth guide channel 213. In detail, the first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112 and the fourth high-pressure channel 113 are connected to the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213 through the four connecting through-holes 310.

[0044] Optionally, the four connecting bolts 300 can be used as fixing bolts of the transition connecting block 200, so that the transition connecting block 200 and the bending roller block 100 become a whole. By consulting the mechanical design manual, it can be known that the threads of the first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112 and the fourth high-pressure channel 113 of the bending roller block 100 are G3 / 4 inches. Therefore, the diameter of the four connecting bolts 300 is φ27, and the diameter of the first bolt hole 220 on the transition connecting block 200 is φ28. Furthermore, the four connecting bolts 300 can also serve as medium (hydraulic oil) channels. In order to ensure that the medium is transported smoothly in the guide channel and the high-pressure channel, a connecting through hole 310 is provided on the connecting bolt 300 to connect the high-pressure channel and the guide channel. It is worth noting that the four connecting bolts 300 in this embodiment have two forms. One form is as follows: Figure 10 As shown, the connecting through hole 310 in another form of connecting bolt 300 is close to the tail (not shown in the figure), which is used for the first bolt hole 220 connecting the second guide channel 211 and the third guide channel 212. In addition, in order to ensure that the tail end of the connecting bolt 300 does not exceed the surface of the transition connecting block 200 after the connecting bolt 300 is tightened in place, the outer side of the four first bolt holes 220 is designed with a φ40×15 countersunk hole.

[0045] Specifically, such as Figure 3 As shown, the bending roll block 100 also has five low-pressure passages 120. Five second bolt holes 230 are also provided on the side of the transition block 200. The second bolt holes 230 and the first bolt holes 220 are located on the same side of the transition block 200. The five low-pressure passages 120 are connected to the five second bolt holes 230. Specifically, the five low-pressure passages 120 on the bending roll block 100 are used to connect to the breathing (upper protective cover), cleaning water, dry oil lubrication, and lubrication and breathing (lower guide rod). The five second bolt holes 230 are the same size as the four first bolt holes 220, with a diameter of φ25. The threads of the five low-pressure passages 120 are also G3 / 4 inches.

[0046] Specifically, the rolling mill bending block assembly provided in this embodiment also includes five mounting bolts (not shown in the drawings due to existing bolts). The five mounting bolts connect the transition block 200 and the bending block 100 through the five second bolt holes 230. Specifically, the five mounting bolts have the same dimensions as the connecting bolts 300 described above, with a diameter of 27 mm. Similarly, to ensure that the tail ends of the mounting bolts do not protrude beyond the surface of the transition block 200 after being tightened, the outer sides of the four second bolt holes 230 are designed with φ40×15 countersunk holes.

[0047] Specifically, such as Figure 1As shown, the rolling mill roll bending block assembly provided in this embodiment further includes two first conversion joints 400 and two second conversion joints 500. The first guide channel 210 and the second guide channel 211 are respectively connected to the two first conversion joints 400, and the third guide channel 212 and the fourth guide channel 213 are respectively connected to the two second conversion joints 500. It can be understood that the first conversion joints 400 and the second conversion joints 500 are designed to better connect to the external hose assembly.

[0048] Specifically, such as Figure 4 As shown, the rolling mill bending roll block assembly provided in this embodiment also includes four sealing gaskets. A sealing platform 240 is provided on one end of the four first bolt holes 220 connected to the bending roll block 100. The four sealing gaskets are respectively provided on the four sealing platforms 240 and are respectively located in the first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112 and the fourth high-pressure channel 113. In detail, the four first bolt holes 220 are hydraulic oil channels, and the problem of preventing the medium from leaking between the transition connection block 200 and the bending roll block 100 needs to be considered. These four first bolt holes 220 are machined on the joint surface between the transition connection block 200 and the bending roll block 100, and four Φ38×6 sealing platforms 240 are inserted into the countersunk holes of the medium channel of the bending roll block 100, and are leak-proofed by the combined sealing gaskets. The combined sealing gasket has a reliable sealing effect and does not require high precision of the sealing surface. According to the mechanical design manual, the thread of the media channel of the bending roller block 100 is G3 / 4 inches, and a combined sealing gasket with a nominal diameter of φ27 and an outer ring diameter of 35 should be used. Since the counterbore size of the media channel of the bending roller block 100 is φ42×7, the sealing platform 240 is designed to be φ38×6.

[0049] Specifically, such as Figure 6 As shown, oil grooves 260 are provided at the connection points between the first guide channel 210, the second guide channel 211, the third guide channel 212, and the fourth guide channel 213 and the four first bolt holes 220. It will be understood that the provision of the oil grooves 260 is to ensure that the medium in the first guide channel 210, the second guide channel 211, the third guide channel 212, and the fourth guide channel 213 can smoothly pass through the connecting through holes 310 and enter the first high-pressure channel 110, the second high-pressure channel 111, the third high-pressure channel 112, and the fourth high-pressure channel 113, respectively.

[0050] Specifically, such as Figure 9 As shown, since the mounting surface of the bending roller block 100 and the slideway ear seat are connected together by welding, there will be a welding groove, so one edge of the transition connection block 200 in this direction is chamfered 250 degrees with a 10×10 angle.

[0051] like Figure 11As shown, the arrangement of the first guide channel 210, the second guide channel 211, the third guide channel 212 and the fourth guide channel 213 on the cross section of the transition connection block 200 is finally designed by comprehensively considering the relevant dimensions of the connecting bolts 300 and the mounting bolts, the sealing surfaces of the first conversion joint 400 and the second conversion joint 500 installed on the transition connection block 200, and the dimensions of the installation space. Figure 11 Middle: The dotted part is the position of the four first bolt holes 220 and the five second bolt holes 230 on the cross section; Φ50 and Φ60 are both the rotation space of the hexagonal wrench bit; Φ27 is the approximate size of the major diameter of the mounting thread G3 / 4. Due to the external dimension limitation of the transition connection block 200, the oil passage is designed to be Φ16. The threads of the first conversion joint 400 and the second conversion joint 500 are designed to be G3 / 4 inches 20mm deep. Because the channel in the upper right corner interferes with the position of the second bolt hole 230 and the first bolt hole 220 (dashed part), the distance from its center to the right is set to 39mm. In this case, the wall thickness between the channel and the second bolt hole 230 or the first bolt hole 220 is only 2mm ( Figure 11 There is visual interference in the plan view, and there is a 2mm wall thickness in the stereoscopic view). The maximum working pressure of the upper cylinder rodless cavity and the lower cylinder rodless cavity can reach 280bar, and the 2mm wall thickness cannot withstand such a high pressure. The working pressure of the upper cylinder rod cavity and the lower cylinder rod cavity is 20bar, and the 2mm wall thickness can meet the requirements. Therefore, the channel in the upper right corner is processed into the fourth guide channel 213 to connect the lower cylinder rod cavity. The bolt countersunk holes in the upper part of the first bolt hole 220 and the second bolt hole 230 also affect the oil hole in the upper left corner, so the upper left corner channel is processed into the first guide channel 210 to connect the upper cylinder rod cavity. In order to facilitate later maintenance, the lower left corner channel is processed into the second guide channel 211. The lower right corner channel is processed into the third guide channel 212. Therefore, the lower left second guide channel 211 is connected to the upper cylinder rodless cavity, and the lower right is the third guide channel 212 to connect the lower cylinder rodless cavity. To ensure easy assembly and disassembly of the first and second adapters 400, 500, and external hose assemblies, the spacing between the first and fourth guide channels 210 and 213 is 61 mm, as is the spacing between the second and third guide channels 211 and 212. The spacing between the upper channels is 25 mm, and the spacing between the lower channels is 21 mm.

[0052] The rolling mill bending block 100 connection assembly provided in this embodiment has at least the following advantages:

[0053] (1) The installation process of the side bending roller block 100 is simplified, and the installation time is shortened.

[0054] (2) The installation quality and reliability are improved, and the service life after the bending roll block 100 is replaced is extended. The machine is no longer forced to stop for processing before the replacement cycle of the bending roll block 100 is reached due to oil leakage.

[0055] (3) The installation location is outside the bending roller block 100, and its working condition can be easily observed, which is convenient for inspection work.

[0056] (4) Reduce failure rate, improve product quality, increase operation time, improve equipment operation rate, and reduce various maintenance costs.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A rolling mill bending block assembly, comprising a bending block, characterized in that: Also includes: A transition connection block is provided on the bending roller block, and has four first bolt holes on a side surface of the transition connection block and has a first guide channel, a second guide channel, a third guide channel, and a fourth guide channel therein, wherein the four first bolt holes all pass through the transition connection block, and the first guide channel, the second guide channel, the third guide channel, and the fourth guide channel are respectively connected to the four first bolt holes; The bending roller block has a first high-pressure channel, a second high-pressure channel, a third high-pressure channel and a fourth high-pressure channel, and the first high-pressure channel, the second high-pressure channel, the third high-pressure channel and the fourth high-pressure channel are connected to the first guide channel, the second guide channel, the third guide channel and the fourth guide channel respectively; Four connecting bolts, each of which is provided with a connecting through hole, the four connecting bolts respectively fix the transition connecting block to the bending roller block through the four first bolt holes, and the four connecting through holes respectively connect the first high-pressure channel and the first guide channel, the second high-pressure channel and the second guide channel, the third high-pressure channel and the third guide channel, and the fourth high-pressure channel and the fourth guide channel.

2. A rolling mill bending block assembly according to claim 1, characterized in that: It also includes four sealing gaskets, and a sealing platform is provided on one end of the four first bolt holes connected to the bending roller block. The four sealing gaskets are respectively provided on the four sealing platforms and are respectively located in the first high-pressure channel, the second high-pressure channel, the third high-pressure channel and the fourth high-pressure channel.

3. A rolling mill bending block assembly according to claim 1, characterized in that: The bending roller block also has five low-pressure channels, and five second bolt holes are also provided on the side of the transition connection block. The second bolt holes and the first bolt holes are located on the same side of the transition connection block and both pass through the transition connection block. The five low-pressure channels are respectively connected to the five second bolt holes.

4. A rolling mill bending block assembly according to claim 3, characterized in that: It also includes five mounting bolts, which respectively connect the transition connection block and the bending roller block through the five second bolt holes.

5. A rolling mill bending block assembly according to claim 1, characterized in that: It also includes two first conversion joints and two second conversion joints, the second guide channel and the first guide channel are respectively connected to the two first conversion joints, and the third guide channel and the fourth guide channel are respectively connected to the two second conversion joints.

6. A rolling mill bending block assembly according to claim 1, characterized in that: The transition connection block is provided with a chamfer.

7. A rolling mill bending block assembly according to claim 1, characterized in that: Oil grooves are provided at the connections between the first guide channel, the second guide channel, the third guide channel and the fourth guide channel and the four first bolt holes.

8. A rolling mill, characterized in that: A rolling mill bending roll block assembly comprising the method described in any one of claims 1 to 7.

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