A water-blocking device for the work rolls of a hot continuous rolling roughing mill and its installation method
By using a dual water-blocking combination of resin plate and high-temperature wear-resistant plate on the work roll of the hot rolling roughing mill, the problem of cooling water leakage caused by damage to the water-blocking plate at high temperature is solved, achieving a highly efficient water-blocking effect, improving rolling stability and strip quality, and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANGANG STEEL CO LTD
- Filing Date
- 2022-10-31
- Publication Date
- 2026-07-17
Smart Images
Figure CN115921534B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steel rolling machinery and equipment technology, and more particularly to a water-blocking device for the work rolls of a hot continuous rolling roughing mill and its installation method. Background Technology
[0002] Because the roughing mill work rolls in the hot rolling production line are reversible, the rotation direction of the rolls switches between forward and reverse. During the rolling process, high-pressure water is sprayed onto the roll surface to cool it. However, it is crucial that as little cooling water leaks onto the hot billet being rolled as possible. Excessive leakage of cooling water onto the hot billet will affect the surface quality of the steel plate rolled in the subsequent cold rolling process. Therefore, baffles need to be installed on the rolls to block the cooling water.
[0003] The existing materials for the baffles on the work rolls of roughing mills are generally metal, water baffles, and wear-resistant rubber plates. Metal water baffles, after installation, suffer from severe water leakage due to a 3-5mm gap between the baffle and the roll surface, significantly impacting the rolling stability, quality, and performance of the strip. While resin-coated water baffles are installed close to the roll surface, the high rolling temperature, combined with the effects of high temperature, iron oxide scale and slag, and the thermal expansion of the rolls, causes significant and uneven wear and damage. Therefore, after a period of rolling, water leakage appears in the mill, and this problem worsens over time. The problem is becoming increasingly serious. The water-blocking plate of the wear-resistant rubber sheet, installed close to the rolls and partially overlapping the roll surface to increase the contact area and improve the water-sealing effect, suffers significant damage under high temperatures, iron oxide scale, and slag, especially in the overlapping section. Furthermore, the roughing mill rolls are reversible; when the rolls switch rotation directions, the edges and corners of the overlapping section of the wear-resistant rubber sheet fold, sometimes even breaking, further damaging the rubber sheet and causing severe water leakage in the mill. This leakage leads to uneven strip temperature drop, significantly impacting the stability of subsequent rolling processes and also negatively affecting strip quality and product performance. Therefore, a leak-proof water-blocking device is urgently needed. Summary of the Invention
[0004] To address the severe water leakage problem of existing roughing mill work roll baffles, this invention provides a water-blocking device and its installation method for hot continuous rolling mill work rolls. This invention primarily employs a dual combination of resin plates and high-temperature wear-resistant plates for slag and water blocking, thereby improving the water-blocking effect of the hot continuous rolling mill work roll baffle.
[0005] The technical means employed in this invention are as follows:
[0006] A water-blocking device for a hot continuous rolling mill roughing roll includes: a metal guard plate, a water-blocking plate, fastening bolts, and a high-temperature wear-resistant plate disposed in the bearing housing groove of the roll; the metal guard plate has a first bolt hole, the water-blocking plate has a second bolt hole, and the high-temperature wear-resistant plate has a third bolt hole; the fastening bolts pass through the second bolt hole, the third bolt hole, and the first bolt hole in sequence to fix the high-temperature wear-resistant plate and the water-blocking plate to the metal guard plate.
[0007] Furthermore, the lengths of the water-blocking plate and the high-temperature wear-resistant plate satisfy the following:
[0008] l1 = l2 = l3 + a
[0009] Where: l1 is the length of the water baffle, l2 is the length of the high temperature and wear resistant plate, l3 is the length of the roller body, and a is 10-20mm.
[0010] Furthermore, the length of the first bolt hole is 10–30 mm.
[0011] Furthermore, the width of the baffle plate satisfies:
[0012] w1 = h1 + h2 + h3 + b
[0013] Where w1 is the width of the baffle plate, h1 is the length of the second bolt hole, h2 is the distance from the second bolt hole to the end face of the baffle plate on the non-working side, h3 is the vertical distance from the first bolt hole to the roll surface, b is the amount of contact between the working side of the baffle plate and the roll surface, h1 is 10-30mm, h2 is 20-40mm, and b is 5-10mm;
[0014] The width of the high-temperature resistant and wear-resistant plate meets the following requirements:
[0015] w2 = w1 + c
[0016] Where w2 is the width of the high-temperature wear-resistant plate, and c is 30-70mm.
[0017] Furthermore, the thickness t1 of the water baffle is 10-20 mm;
[0018] The thickness t2 of the high-temperature wear-resistant plate is:
[0019]
[0020] Where: h4 is the gap between the metal guard plate and the roll surface, and d is 1 to 3 mm.
[0021] Furthermore, the bonding amount between the high-temperature wear-resistant plate and the roll is 10-20 mm;
[0022] The angle between the water baffle and the roller is 20-40°, and the angle between the high-temperature wear-resistant plate and the roller is 20-40°.
[0023] Furthermore, the second bolt hole is rectangular, and the third bolt hole is circular.
[0024] A method for installing a water-blocking device for the work rolls of a hot strip mill roughing mill, based on the aforementioned water-blocking device for the work rolls of a hot strip mill roughing mill, includes the following steps:
[0025] Place the high-temperature resistant and wear-resistant plate and the water baffle plate on the metal protective plate in sequence, aligning the second bolt hole, the third bolt hole, and the first bolt hole.
[0026] Pass the fastening bolts through the second bolt hole, the third bolt hole, and the first bolt hole in sequence;
[0027] Move the baffle plate up and down to make the baffle plate and the roller surface fit together by 5-10mm;
[0028] Tighten the bolts;
[0029] Install the fixed high-temperature wear-resistant plate, water baffle, and metal guard plate into the bearing box groove of the roll, so that the high-temperature wear-resistant plate is bent inward and fits against the roll surface, and the water baffle is fitted against the roll surface.
[0030] Tighten the bolts on both sides of the metal guard plate to prevent it from shifting.
[0031] Compared with the prior art, the present invention has the following advantages:
[0032] This invention utilizes a metal guard plate for the rolling mill, on which a double water-blocking device consisting of a water-blocking plate and a high-temperature wear-resistant plate is installed. The water-blocking plate not only blocks water but also prevents iron oxide scale and slag from damaging the high-temperature wear-resistant plate. It also presses down the high-temperature wear-resistant plate to prevent folding damage. Adding a water-blocking plate to the high-temperature wear-resistant plate not only prevents the plate from getting caught in the mill gap but also acts as a primary water-blocking device. When the rolling mill expands due to thermal expansion and the water-blocking plate wears down, the high-temperature wear-resistant plate can act as a secondary water-blocking device, effectively preventing the leakage of cooling water from the rolling mill. The water-blocking effect is maximized, avoiding the problem of water leakage in the roughing mill.
[0033] This invention discloses the width relationship and value range of the water baffle and the high temperature and wear resistant plate, under which the rubber plate can be prevented from breaking and twisting and the rubber plate can be made to stick tightly to the roller.
[0034] This invention discloses the contact amount range between the high-temperature wear-resistant plate and the rolling mill, and the contact angle range between the water baffle, the high-temperature wear-resistant plate and the rolling mill. Under this contact amount and contact angle range, the wear of the water baffle and the waterproof effect are optimal. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0036] Figure 1 This is the front view of the present invention.
[0037] Figure 2 This is a top view of the present invention.
[0038] In the diagram: 1. Roller; 2. Metal guard plate; 3. Water baffle; 4. Fastening bolts; 5. High-temperature wear-resistant plate. Detailed Implementation
[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0043] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0044] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.
[0046] like Figure 1-2As shown, this invention provides a water-blocking device for the work roll of a hot continuous rolling mill roughing mill, comprising: a metal guard plate 2, a water-blocking plate 3, fastening bolts 4, and a high-temperature wear-resistant plate 5 disposed in the bearing housing groove of the roll 1; the metal guard plate 2 has a first bolt hole, the water-blocking plate 3 has a second bolt hole, and the high-temperature wear-resistant plate 5 has a third bolt hole; the fastening bolts 4 sequentially pass through the second bolt hole, the third bolt hole, and the first bolt hole to fix the high-temperature wear-resistant plate 5 and the water-blocking plate 3 to the metal guard plate 2. The water-blocking plate 3 is a resin water-blocking plate. The high-temperature wear-resistant plate 5 is a rubber plate.
[0047] The lengths of the water-blocking plate 3 and the high-temperature wear-resistant plate 5 satisfy the following:
[0048] l1 = l2 = l3 + a
[0049] Where: l1 is the length of the water baffle 3, l2 is the length of the high-temperature wear-resistant plate 5, l3 is the length of the roll body, and a is 10-20mm. This ensures that the cooling water for the roll flows out from both sides of the roll, preventing leakage onto the strip surface;
[0050] The length of the first bolt hole is 10-30mm. After the baffle plate 3 wears down, it can be moved around and reused, reducing material loss and extending its service life.
[0051] The width of the baffle plate 3 satisfies:
[0052] w1 = h1 + h2 + h3 + b
[0053] Where w1 is the width of the baffle plate 3, h1 is the width of the second bolt hole, h2 is the distance from the second bolt hole to the end face of the baffle plate on the non-working side, h3 is the vertical distance from the first bolt hole to the roll surface, b is the amount of contact between the working side of the baffle plate 3 and the roll surface, h1 is 10-30mm, h2 is 20-40mm, and b is 5-10mm;
[0054] The width of the high-temperature resistant and wear-resistant plate 5 satisfies:
[0055] w2 = w1 + c
[0056] Where w2 is the width of the high-temperature wear-resistant plate 5, and c is 30-70mm.
[0057] The thickness t1 of the water baffle 3 is 10-20 mm;
[0058] The thickness t2 of the high-temperature wear-resistant plate 5 is:
[0059]
[0060] Where: h4 is the gap between the metal guard plate 2 and the roll surface, and d is 1 to 3 mm.
[0061] The bonding amount between the high-temperature wear-resistant plate 5 and the rolling mill roll is 10-20mm;
[0062] The angle between the water baffle 3 and the roller is 20-40°, and the angle between the high temperature and wear resistant plate 5 and the roller is 20-40°.
[0063] The present invention also provides an installation method for a water-blocking device for the work rolls of a hot continuous rolling mill, which is based on the above-mentioned water-blocking device for the work rolls of a hot continuous rolling mill and includes the following steps:
[0064] The metal guard plate 2 is provided with bolt holes for fixing the water baffle plate 3 and the high temperature and wear resistant plate 5. The second bolt hole of the water baffle plate 3 can also be countersunk. The second bolt hole is rectangular in shape, so that the water baffle plate 3 can continue to be used after the roller surface of the roller 1 is worn.
[0065] Set the third bolt hole of the high temperature and wear resistant plate 5 as a round hole, place it on the metal guard plate 2 and align it with the first bolt hole, then place the water baffle 3 on the high temperature and wear resistant plate and align the second bolt hole, then pass the fastening bolt 4 through the resin plate and the high temperature and wear resistant plate and screw it into the bolt hole of the metal guard plate, then move the water baffle 2 up and down to ensure that its contact with the roller surface meets the requirements, and finally tighten the fastening bolt 4.
[0066] Install the two sections of the metal guard plate 2 into the bearing box groove of the roll 1, ensuring that the high temperature and wear resistant plate 5 bends inward and fits against the roll surface of the roll 1. The water baffle 2 fits against the roll surface of the roll 1. Then tighten the bolts on both sides of the metal guard plate 2 to prevent it from moving.
[0067] Because the high-temperature wear-resistant plate 5 is relatively soft and overlaps with the roll surface of roll 1 for a certain length, and because the hot continuous rolling roughing mill is a reversible rolling mill, in order to prevent the edges or corners of the high-temperature wear-resistant plate 5 from bending and getting caught on the other side during the roll rotation and reversal, thus damaging the high-temperature wear-resistant plate 5 and weakening its water-blocking performance, a water-blocking plate 2 is added to the high-temperature wear-resistant plate 5. In addition to preventing the high-temperature wear-resistant plate 5 from getting caught in the mill gap, it also plays a primary water-blocking role. After the roll 1 undergoes thermal expansion and wears into the water-blocking plate 2, the high-temperature wear-resistant plate 5 can play a secondary water-blocking role, effectively preventing the leakage of the roll cooling water. This achieves the goal of preventing the leakage of the roughing mill roll cooling water, solves the problem of water leakage in the roughing mill work roll, meets the production needs, greatly reduces the temperature drop in roughing, reduces energy consumption, and creates greater benefits for the enterprise.
[0068] Example
[0069] A water-blocking device for a hot continuous rolling mill roughing roll includes: a metal guard plate 2, a water-blocking plate 3, fastening bolts 4, and a high-temperature wear-resistant plate 5, all disposed within a bearing housing groove of the roll 1. The metal guard plate 2 has a first bolt hole, the water-blocking plate 3 has a second bolt hole, and the high-temperature wear-resistant plate 5 has a third bolt hole. The fastening bolts 4 sequentially pass through the second bolt hole, the third bolt hole, and the first bolt hole to fix the high-temperature wear-resistant plate 5 and the water-blocking plate 3 to the metal guard plate 2. The water-blocking plate 3 is 1590 mm long and 110 mm wide. The second bolt hole is 25 mm long and 20 mm thick. The high-temperature wear-resistant plate 5 is 1590 mm long, 150 mm wide, and 5 mm thick. The angle between the water-blocking plate 3, the high-temperature wear-resistant plate 5, and the roll 1 is 20°. According to the installation method, install high temperature and wear resistant plates 5 and water baffles 3 on the upper and lower metal guard plates 2 of the working roller, make countersunk bolt holes with a depth of 5mm on the water baffles 3, add anti-loosening washers, and tighten the bolts.
[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A water-blocking device for the work rolls of a hot continuous rolling mill roughing mill, characterized in that, include: The metal guard plate (2), water baffle plate (3), fastening bolt (4) and high temperature wear-resistant plate (5) are set in the bearing box groove of the roll (1); the metal guard plate (2) has a first bolt hole, the water baffle plate (3) has a second bolt hole, the high temperature wear-resistant plate (5) has a third bolt hole, and the fastening bolt (4) passes through the second bolt hole, the third bolt hole and the first bolt hole in sequence to fix the high temperature wear-resistant plate (5) and the water baffle plate (3) to the metal guard plate (2); The lengths of the water baffle (3) and the high-temperature wear-resistant plate (5) satisfy the following: l 1= l 2= l 3+ a in: l 1 represents the length of the water baffle (3). l 2 represents the length of the high-temperature wear-resistant plate (5). l 3 represents the length of the roller body. a It is 10~20mm; The width of the baffle plate (3) satisfies: w 1= h 1+ h 2+ h 3+ b in, w 1 represents the width of the baffle plate (3). h 1 represents the length of the second bolt hole. h 2 represents the distance from the second bolt hole to the end face of the non-working side baffle plate. h 3 represents the vertical distance from the first bolt hole to the roll surface. b The amount of contact between the working side of the baffle plate (3) and the roll surface. h 1 is 10~30mm, h 2 is 20~40mm, b It is 5~10mm; The width of the high-temperature wear-resistant plate (5) satisfies: w 2= w 1+ c in, w 2 represents the width of the high-temperature wear-resistant plate (5). c 30~70mm; The thickness of the baffle plate (3) t 1 is 10~20mm; The thickness of the high-temperature wear-resistant plate (5) t 2 is: t 2= - d in: h 4 represents the gap between the metal guard plate (2) and the roll surface. d It is 1~3mm.
2. The water-blocking device for the work rolls of a hot continuous rolling mill according to claim 1, characterized in that: The length of the first bolt hole is 10~30mm.
3. The water-blocking device for the work rolls of a hot continuous rolling mill according to claim 1, characterized in that: The amount of the high-temperature wear-resistant plate (5) in contact with the roll is 10~20mm; The angle between the water baffle (3) and the roller is 20~40°, and the angle between the high temperature resistant and wear-resistant plate (5) and the roller is 20~40°.
4. The water-blocking device for the work rolls of a hot continuous rolling mill according to claim 1, characterized in that: The second bolt hole is rectangular, and the third bolt hole is circular.
5. A method for installing a water-blocking device for the work rolls of a hot continuous rolling mill, implemented based on the water-blocking device for the work rolls of a hot continuous rolling mill as described in any one of claims 1-4, characterized in that, Includes the following steps: Place the high-temperature wear-resistant plate (5) and the water baffle (3) on the metal guard plate (2) in sequence, so that the second bolt hole, the third bolt hole and the first bolt hole are aligned; Pass the fastening bolt (4) through the second bolt hole, the third bolt hole, and the first bolt hole in sequence; Move the baffle plate (3) up and down so that the baffle plate (3) and the roller surface are in contact with each other by 5~10mm; Tighten the fastening bolts (4); Install the fixed high temperature and wear resistant plate (5), water baffle (3), and metal guard plate (2) into the bearing box groove of the roll, so that the high temperature and wear resistant plate (5) is bent inward and fits against the roll surface, and the water baffle (3) fits against the roll surface. Tighten the bolts on both sides of the metal guard plate (2) to prevent the metal guard plate (2) from moving.