Roll gap measuring device and rolling mill

Abstract

The application discloses a roll gap measuring device and a rolling mill. The roll gap measuring device comprises a displacement sensor and an electric screwdown structure. The displacement sensor comprises a sensor head, and an inductive rod is electrically connected to the sensor head. The electric screwdown structure comprises a screwdown screw, and the screwdown screw is connected to a hydraulic screwdown structure. An inductive rod channel is arranged through the electric screwdown structure and the hydraulic screwdown structure. A first magnetic ring capable of moving with the screwdown screw is arranged at the first end of the electric screwdown structure. A second magnetic ring capable of moving with the hydraulic screwdown structure is arranged in the inductive rod channel. The inductive rod is used for inductively detecting the positions of the first magnetic ring and the second magnetic ring, and the sensor head sends position signals of the first magnetic ring and the second magnetic ring. The application can output multiple position signals by using one sensor head. In the hydraulic screwdown structure, only the second magnetic ring and the inductive rod passing through the second magnetic ring need to be considered, and the sensor head of the displacement sensor installed in the hydraulic screwdown structure does not need to be considered, thereby saving the space necessary for installation.

Description

Technical Field

[0001] This invention relates to the field of strip rolling technology, and in particular to a roll gap measuring device and a rolling mill. Background Technology

[0002] Because of the need to roll slabs, the roll gap of roughing mills varies greatly. In addition, the requirements for plate thickness deviation are becoming increasingly stringent. In recent years, most newly designed strip roughing mills have adopted an electro-hydraulic dual-reduction mechanism. The electric reduction device is used for large-stroke reduction and rough adjustment of roll gap; the hydraulic reduction device is used for rapid response and fine adjustment, and can also release pressure when the rolling force exceeds the set value, thus protecting the mill.

[0003] like Figure 4 , Figure 5 As shown, the electric pressing device 93 drives the pressing screw through the electric pressing system to move a large distance under no-load conditions and set the original roll gap; the hydraulic pressing device 94 is a hydraulic cylinder installed between the pressing screw and the upper roll bearing seat 95, which is used to make timely micro-adjustments and corrections to the mill roll gap as the slab thickness, rolling pressure and finished product thickness change during the rolling process, so as to ensure higher accuracy of the finished plate thickness deviation.

[0004] The sensor head of a first existing displacement sensor 91 is fixedly installed on the displacement sensor mounting bracket on the housing. The sensing rod of the displacement sensor is fixedly connected to the bottom of the sensor head. The magnetic ring of the displacement sensor is installed at the top of the pressing screw of the electric pressing device. The magnetic ring passes through the sensing rod and moves up and down with the pressing screw. The sensing rod sends a position signal for measuring, controlling, and setting the position of the pressing screw. The sensor head of a second existing displacement sensor 92 is installed on the cylinder of the hydraulic pressing device. The sensing rod of the displacement sensor is fixedly connected to the top of the sensor head. The magnetic ring of the displacement sensor is installed in the piston. The magnetic ring passes through the sensing rod and moves up and down with the piston. The sensing rod sends a position signal for measuring, controlling, and setting the final roll gap.

[0005] With the rapid development of hot rolling technology and increasingly stringent requirements for strip thickness tolerances, there is a growing demand for converting traditional hot strip mills into electro-hydraulic dual-pressure mechanisms by adding hydraulic pressure devices to the existing electric pressure system. Installing the sensor head, sensing rod, and magnetic ring of the displacement sensor on the cylinder and piston of the hydraulic pressure device requires a specific installation height. In retrofit projects, the distance between the pressure screw and the upper roll bearing seat is often limited, and this limited distance is often insufficient for conveniently designing and adding a hydraulic pressure device. Retrofit design work is generally quite difficult. The cylinder, piston, and both convex and concave pads may need to be designed with minimum thicknesses that meet strength requirements, which will affect the reliability and service life of these components.

[0006] Therefore, based on years of experience and practice in related industries, the inventor proposes a roll gap measuring device and rolling mill to overcome the shortcomings of the prior art. Summary of the Invention

[0007] The purpose of this invention is to provide a roll gap measuring device and a rolling mill, overcoming the problems existing in the prior art. The sensing rod of this invention senses and detects the position of the first magnetic ring and the second magnetic ring, and the sensor head outputs the position signals of the first magnetic ring and the second magnetic ring. One sensor head can output multiple position signals. In the hydraulic pressing structure, only the installation of the second magnetic ring and the sensing rod passing through it needs to be considered, without the need to consider the sensor head of the displacement sensor in the hydraulic pressing structure, which can save the space required for its installation.

[0008] The objective of this invention is achieved as follows: a roll gap measuring device includes a displacement sensor and an electrically operated pressing structure. The displacement sensor includes a sensor head located at the end of the housing away from the upper roll bearing seat. The sensor head is electrically connected to a sensing rod extending upward from the upper roll bearing seat. The electrically operated pressing structure includes a pressing screw connected to a hydraulic pressing structure. A sensing rod channel is provided through the electrically operated pressing structure and the hydraulic pressing structure, and the sensing rod slides through the sensing rod channel. A first magnetic ring movable with the pressing screw is provided at the first end of the electrically operated pressing structure, and a second magnetic ring movable with the hydraulic pressing structure is provided in the sensing rod channel. The sensing rod can pass through the first magnetic ring and the second magnetic ring. The sensing rod is used to sense and detect the positions of the first magnetic ring and the second magnetic ring, and the sensor head outputs position signals of the first magnetic ring and the second magnetic ring.

[0009] In a preferred embodiment of the present invention, the hydraulic pressing structure includes a cylinder body, a piston is disposed within the cylinder body, a convex pad and a concave pad are connected to the piston, the concave pad is connected to the pressing screw, and the sensing rod channel is disposed through the electric pressing structure, the concave pad, the convex pad and the piston; a magnetic ring mounting sleeve is disposed within the cylinder body, the first end of the magnetic ring mounting sleeve passes through the sensing rod channel, and the first end of the magnetic ring mounting sleeve is connected to the second magnetic ring.

[0010] In a preferred embodiment of the present invention, the magnetic ring mounting sleeve includes a mounting base and a mounting post, the mounting post being slidably disposed within the sensing rod channel, and the second magnetic ring being disposed at the first end of the mounting post.

[0011] In a preferred embodiment of the present invention, a sealing element is provided between the mounting post and the sensing rod channel.

[0012] In a preferred embodiment of the present invention, the first end of the mounting post is slidably inserted into the upper part of the electrically pressed-down structure.

[0013] In a preferred embodiment of the present invention, the mounting column is provided in a segmented and detachable connection configuration.

[0014] In a preferred embodiment of the present invention, the segments of the mounting post are connected by threads.

[0015] In a preferred embodiment of the present invention, the mounting base is connected to the cylinder body by screws.

[0016] In a preferred embodiment of the present invention, the sensor head is disposed on a displacement sensor mounting bracket, and the displacement sensor mounting bracket is connected to the side wall of the housing away from the upper roll bearing seat.

[0017] The object of the present invention can also be achieved by providing a rolling mill, including a housing and an upper roll bearing housing, wherein a roll gap measuring device as described above is provided between the housing and the upper roll bearing housing.

[0018] As described above, the roll gap measuring device and rolling mill provided by the present invention have the following beneficial effects:

[0019] In this invention, a sensing rod slides through a sensing rod channel. A first magnetic ring, movable with the pressing screw, is located at the first end of the electrically operated pressing structure. A second magnetic ring, movable with the hydraulic pressing structure, is located within the sensing rod channel. The sensing rod detects the positions of the first and second magnetic rings, and the sensor head outputs position signals for both. One sensor head can output multiple position signals, enabling the measurement and control of both the pressing screw position of the electrically operated pressing structure and the position of the hydraulic pressing structure, thus achieving precise measurement and control of the mill roll gap. This invention uses a displacement sensor capable of outputting multiple positions. In the hydraulic pressing structure, only the installation of the second magnetic ring and the sensing rod passing through it needs to be considered; there is no need to consider installing the sensor head of the displacement sensor within the hydraulic pressing structure, saving the necessary installation space. Attached Figure Description

[0020] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0021] in:

[0022] Figure 1 : This is a schematic diagram of an embodiment of the roll gap measuring device of the present invention.

[0023] Figure 2 : This is a schematic diagram of a second embodiment of the roll gap measuring device of the present invention.

[0024] Figure 3 : This is a schematic diagram of Embodiment 3 of the roll gap measuring device of the present invention.

[0025] Figure 4 : A schematic diagram of the cross-section of a conventional rolling mill.

[0026] Figure 5 : A schematic diagram of a prior art roll gap measuring device.

[0027] In the picture:

[0028] 1. Displacement sensor; 11. Sensor head; 12. Sensing rod;

[0029] 2. Housing; 21. Displacement sensor mounting bracket;

[0030] 3. Electric pressing structure; 31. Pressing screw;

[0031] 4. Hydraulic pressing structure; 41. Cylinder; 42. Piston; 43. Convex pad; 44. Concave pad;

[0032] 51. First magnetic ring; 52. Second magnetic ring;

[0033] 6. Magnetic ring mounting sleeve; 61. Mounting base; 62. Mounting post;

[0034] 91. First existing displacement sensor; 92. Second existing displacement sensor; 93. Electric pressing device; 94. Hydraulic pressing device; 95. Upper roll bearing housing. Detailed Implementation

[0035] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0036] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1 to 3 As shown, the present invention provides a roll gap measuring device, including a displacement sensor 1 and an electric pressing structure 3. The displacement sensor 1 includes a sensor head 11 located at the end of the housing 2 away from the upper roll bearing seat 95 (prior art). The sensor head 11 is electrically connected to a sensing rod 12 extending from the upper roll bearing seat. The electric pressing structure 3 includes a pressing screw 31 connected to a hydraulic pressing structure 4. A sensing rod channel is provided through the electric pressing structure 3 and the hydraulic pressing structure 4. The sensing rod 12 slides through the sensing rod channel. A first magnetic ring 51 that can move with the pressing screw is provided at the first end of the electric pressing structure 3. A second magnetic ring 52 is provided in the sensing rod channel. The second magnetic ring 52 can move with the hydraulic pressing structure 4. The sensing rod 12 can pass through the first magnetic ring 51 and the second magnetic ring 52. The sensing rod 12 is used to sense and detect the position of the first magnetic ring 51 and the second magnetic ring 52. The sensor head 11 emits position signals of the first magnetic ring 51 and the second magnetic ring 52.

[0039] The sensing rod 12 passes through the first magnetic ring 51, which moves up and down with the pressing screw 31. The sensing rod 12 senses and detects the position of the first magnetic ring 51 and transmits it to the sensor head 11. The sensor head 11 sends a position signal to measure, control, and set the position of the pressing screw 31.

[0040] The sensing rod 12 passes through the second magnetic ring 52, which moves up and down with the hydraulic pressing structure 4. The sensing rod 12 senses and detects the position of the second magnetic ring 52 and transmits it to the sensor head 11. The sensor head 11 sends a position signal for measuring, controlling and setting the final roll gap.

[0041] One sensor head 11 can output multiple position signals to complete the measurement and control of the position of the pressing screw of the electric pressing structure 3 of the rolling mill and the position measurement and control of the hydraulic pressing structure 4, while achieving the purpose of accurately measuring and controlling the roll gap of the rolling mill.

[0042] The electric pressing structure 3 is used for long-stroke pressing and coarse adjustment of the roll gap; the hydraulic pressing structure 4 is used for rapid response fine adjustment.

[0043] This invention selects a displacement sensor 1 that can output multiple positions. In the hydraulic pressing structure 4, only the installation of the second magnetic ring 52 and the sensing rod 12 passing through it needs to be considered. There is no need to consider installing the sensor head 11 of the displacement sensor in the hydraulic pressing structure, thus saving the space required for its installation and making the design of the hydraulic pressing structure easier. Using a displacement sensor that outputs two positions saves some cost compared to using two displacement sensors that output one position.

[0044] In this invention, while meeting all functional requirements, the hydraulic pressing structure modification project with a limited distance between the pressing screw 31 and the upper roll bearing seat simplifies the design work and does not affect the strength, reliability and service life of the hydraulic pressing structure due to the limited height.

[0045] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the hydraulic pressing structure 4 includes a cylinder 41, a piston 42 is disposed inside the cylinder 41, a convex pad 43 and a concave pad 44 are connected to the piston 42, the concave pad 44 is connected to the pressing screw 31, and the sensing rod channel is disposed through the electric pressing structure 3, the concave pad 44, the convex pad 43 and the piston 42; a magnetic ring mounting sleeve 6 is disposed inside the cylinder 41, the first end of the magnetic ring mounting sleeve 6 passes through the sensing rod channel, and the first end of the magnetic ring mounting sleeve 6 is connected to the second magnetic ring 52.

[0046] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the magnetic ring mounting sleeve 6 includes a mounting base 61 and a mounting post 62. The mounting post 62 is slidably inserted into the sensing rod channel, and a second magnetic ring 52 is provided at the first end of the mounting post 62.

[0047] Furthermore, a seal is provided between the mounting post 62 and the sensing rod channel, typically between the mounting post 62 and the piston 42.

[0048] Furthermore, the first end of the mounting column 62 can be slidably inserted into the upper part of the electric pressing structure 3, and the sensing rod 12 is shortened, which is beneficial for the selection of the displacement sensor 1 and reduces costs.

[0049] like Figure 1 As shown, in Embodiment 1, the length of the sensing rod 12 extends into the hydraulic pressing structure 4 (concave pad 44), and the first end of the mounting post 62 is located in the interface of the hydraulic pressing structure 4 (concave pad 44).

[0050] like Figure 2 As shown, in Embodiment 2, the mounting column 62 is integrally and continuously arranged;

[0051] like Figure 3As shown, in Embodiment 3, the mounting column 62 is configured with segmented and detachable connections. Each segment of the mounting column 62 can be connected by threads, which is beneficial for the selection of displacement sensor 1 and reducing costs, as well as for the processing and manufacturing of magnetic ring mounting sleeve 6 and the installation and maintenance of hydraulic pressing structure 4.

[0052] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the mounting base 61 is connected to the cylinder body 41 by screws.

[0053] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the sensor head 11 is mounted on the displacement sensor mounting bracket 21, which is connected to the side wall of the housing 2 away from the upper roll bearing seat.

[0054] The present invention also provides a rolling mill, including a housing and an upper roll bearing housing, wherein the aforementioned roll gap measuring device is disposed between the housing and the upper roll bearing housing.

[0055] As described above, the roll gap measuring device and rolling mill provided by the present invention have the following beneficial effects:

[0056] In this invention, a sensing rod slides through a sensing rod channel. A first magnetic ring, movable with the pressing screw, is located at the first end of the electrically operated pressing structure. A second magnetic ring, movable with the hydraulic pressing structure, is located within the sensing rod channel. The sensing rod detects the positions of the first and second magnetic rings, and the sensor head outputs position signals for both. One sensor head can output multiple position signals, enabling the measurement and control of both the pressing screw position of the electrically operated pressing structure and the position of the hydraulic pressing structure, thus achieving precise measurement and control of the mill roll gap. This invention uses a displacement sensor capable of outputting multiple positions. In the hydraulic pressing structure, only the installation of the second magnetic ring and the sensing rod passing through it needs to be considered; there is no need to consider installing the sensor head of the displacement sensor within the hydraulic pressing structure, saving the necessary installation space.

[0057] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A roll gap measuring device, comprising a displacement sensor and an electrically operated pressing structure, wherein the displacement sensor includes a sensor head located at the end of the housing away from the upper roll bearing seat, and the sensor head is electrically connected to a sensing rod extending upward from the upper roll bearing seat, characterized in that, The electrically operated pressing structure includes a pressing screw connected to a hydraulic pressing structure. A sensing rod channel is provided through the electrically operated pressing structure and the hydraulic pressing structure, and the sensing rod slides through the sensing rod channel. A first magnetic ring that can move with the pressing screw is provided at the first end of the electrically operated pressing structure, and a second magnetic ring that can move with the hydraulic pressing structure is provided in the sensing rod channel. The sensing rod can pass through the first magnetic ring and the second magnetic ring. The sensing rod is used to sense and detect the positions of the first magnetic ring and the second magnetic ring, and the sensor head outputs position signals of the first magnetic ring and the second magnetic ring.

2. The roll gap measuring device as described in claim 1, characterized in that, The hydraulic pressing structure includes a cylinder body, a piston is disposed inside the cylinder body, a convex pad and a concave pad are connected to the piston, the concave pad is connected to the pressing screw, and the sensing rod channel is disposed through the electric pressing structure, the concave pad, the convex pad and the piston; a magnetic ring mounting sleeve is disposed inside the cylinder body, the first end of the magnetic ring mounting sleeve passes through the sensing rod channel, and the first end of the magnetic ring mounting sleeve is connected to the second magnetic ring.

3. The roll gap measuring device as described in claim 2, characterized in that, The magnetic ring mounting sleeve includes a mounting base and a mounting post. The mounting post is slidably inserted into the sensing rod channel, and the second magnetic ring is disposed at the first end of the mounting post.

4. The roll gap measuring device as described in claim 3, characterized in that, A sealing element is provided between the mounting post and the sensing rod channel.

5. The roll gap measuring device as described in claim 3, characterized in that, The first end of the mounting column is slidably inserted into the upper part of the electric pressing structure.

6. The roll gap measuring device as described in claim 5, characterized in that, The mounting column is configured in a segmented, detachable connection.

7. The roll gap measuring device as described in claim 6, characterized in that, The sections of the mounting post are connected by threads.

8. The roll gap measuring device as described in claim 3, characterized in that, The mounting base is connected to the cylinder body by screws.

9. The roll gap measuring device as described in claim 3, characterized in that, The sensor head is mounted on a displacement sensor mounting bracket, which is connected to the side wall of the housing away from the upper roll bearing seat.

10. A rolling mill, comprising a housing and an upper roll bearing housing, characterized in that, A roll gap measuring device as described in any one of claims 1 to 9 is provided between the housing and the upper roll bearing seat.

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