Automatic thickness control oil cylinder and rolling equipment

Abstract

The utility model relates to the field of rolling, and discloses an automatic thickness control oil cylinder and rolling device.The automatic thickness control oil cylinder comprises a cylinder body, a piston rod, a displacement sensor and a magnetic ring structure, an oil cavity is defined in the cylinder body, a mounting hole is formed in the inner wall of the oil cavity, the piston rod is slidably mounted in the oil cavity, and the piston rod is partially located outside the cylinder body; the displacement sensor is fixedly installed in the piston rod, the magnetic ring structure is installed in the installation hole, and the piston rod partially penetrates through the magnetic ring structure and goes deep into the installation hole. The magnetic ring structure is installed on the cylinder body, that is, the magnetic ring structure is arranged in the oil cavity, the magnetic ring structure is arranged in the installation hole located in the cylinder body, and the displacement sensor partially penetrates through the magnetic ring structure to penetrate into the installation hole. Therefore, the space occupied by the whole oil cylinder can be reduced, the cylinder body can be directly connected with a pushed object, and the oil cylinder can be installed in a small space.

Description

Technical Field

[0001] The present application relates to the field of rolling, and in particular to an automatic thickness control oil cylinder and rolling equipment. Background Art

[0002] In current dry continuous rolling equipment, the use of hydraulic cylinders is crucial. The traditional approach is to use a constant-pressure plunger cylinder to control the total pressure, but this approach has obvious limitations. First, the constant-pressure plunger cylinder can only achieve overall control of the total pressure of multi-stage rolls, but cannot independently adjust the pressure between two individual rolls, which limits further improvement in rolling accuracy. Secondly, in order to achieve the control of the roll gap, the constant-pressure plunger cylinder needs to be additionally equipped with an inclined iron mechanism, which not only increases the complexity of the equipment but also affects the flexibility of control. In addition, the constant-pressure plunger cylinder has deficiencies in the online real-time adjustment and control of pressure and roll gap, making it difficult to meet the high-precision and high-efficiency requirements of modern rolling processes. Although the traditional AGC (Automatic Gauge Control) hydraulic cylinder can achieve high-precision displacement control, the configuration of its displacement sensor and cylinder body results in a large installation space requirement, which makes it impossible to apply it to small-roll continuous rolling equipment with limited space. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide an automatic thickness control cylinder and rolling equipment.

[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] This application provides:

[0006] An automatic thickness control oil cylinder, comprising:

[0007] A cylinder body, wherein an oil cavity is defined inside the cylinder body, and an inner wall of the oil cavity is provided with a mounting hole;

[0008] a piston rod, the piston rod being slidably mounted inside the oil chamber, the piston rod portion being located outside the cylinder body;

[0009] a displacement sensor, the displacement sensor being fixedly mounted in the piston rod;

[0010] A magnetic ring structure is installed in the installation hole, and the piston rod partially passes through the magnetic ring structure and extends into the installation hole.

[0011] Furthermore, the cylinder body includes a receiving member and a closing member, the receiving member is fixedly connected to the closing member, and the receiving member and the closing member define the oil chamber.

[0012] Furthermore, an oil inlet and outlet structure is provided on the accommodating member, and the oil inlet and outlet structure includes a first oil hole and a second oil hole opened on the accommodating member, and the first oil hole and the second oil hole are both connected to the oil cavity.

[0013] Furthermore, the piston rod includes a rod body, and installation cavities are respectively opened inside the rod body along its axial direction. A pressure cover is connected to the opening of the installation cavity, and a first avoidance hole is opened through the pressure cover, and the first avoidance hole is connected to the installation cavity. A second avoidance hole is opened through the end of the installation cavity away from the pressure cover, and the second avoidance hole is connected to the installation cavity.

[0014] Furthermore, the rod body includes a first sliding portion and a second sliding portion, the mounting cavity is provided in the first sliding portion, and the second avoidance hole is provided in the second sliding portion.

[0015] Furthermore, a first sealing member is provided between the gland and the inner wall of the gland.

[0016] Furthermore, the displacement sensor includes a sensing element, a mounting element is provided on the sensing element, and a signal line is installed at an end of the sensing element.

[0017] Furthermore, the magnetic ring structure includes a washer arranged in the mounting hole, a magnetic ring body is arranged on one side of the washer, and a pressure ring is arranged at the opening of the mounting hole, wherein the magnetic ring body is located between the washer and the pressure ring.

[0018] Furthermore, a second sealing member is provided between the piston rod and the inner wall of the oil chamber.

[0019] The present application provides a rolling device, comprising any of the automatic thickness control cylinders described above.

[0020] The present application installs the magnetic ring structure on the cylinder body, that is, the magnetic ring structure is arranged inside the oil chamber, and the magnetic ring structure is arranged in the mounting hole located on the cylinder body, and the displacement sensor partially passes through the magnetic ring structure and extends deep into the mounting hole. By completely arranging the displacement sensor in the piston rod of the oil chamber, the space occupied by the entire oil cylinder can be reduced, the cylinder body can be directly connected to the object being pushed, and can be installed in a smaller space, thereby being able to adapt to equipment with limited space.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application 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 creative work.

[0023] Figure 1 Shows a schematic cross-sectional view of the oil cylinder of the present application;

[0024] Figure 2 Shows a schematic diagram of the piston rod structure of the present application;

[0025] Figure 3 Shows a schematic diagram of the displacement sensor structure of the present application;

[0026] Figure 4 Shows this application Figure 1 Enlarged structural diagram at point A in the middle.

[0027] Explanation of the main component symbols: 100-cylinder body; 110-accommodating part; 120-closing part; 200-oil chamber; 300-piston rod; 310-rod body; 311-first sliding part; 312-second sliding part; 320-pressure cover; 330-installing chamber; 340-first avoidance hole; 350-second avoidance hole; 360-first sealing part; 400-displacement sensor; 410-sensing part; 420-installing part; 430-signal line; 500-installing hole; 600-magnetic ring structure; 610-gasket; 620-magnetic ring body; 630-pressure ring; 700-oil inlet and outlet structure; 710-first oil hole; 720-second oil hole; 800-second sealing part. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0029] In the description of the present application, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] Although the traditional AGC (Automatic Gauge Control) cylinder can achieve precise control of movement, the existing displacement sensor is partially located on the cylinder body, thereby occupying a certain amount of space. Due to the installation position relationship between the displacement sensor and the cylinder body, a larger installation space is required, which makes it impossible to adapt to small-roll continuous rolling equipment with smaller space. For this reason, the present application sets the displacement sensor 400 on the piston rod 300, so that the displacement sensor 400 is completely located in the oil chamber 200. Compared with the existing ones, the space occupied is reduced and it can adapt to a smaller installation space.

[0034] Specifically, the present application provides an automatic thickness control oil cylinder, which includes a cylinder body 100 , a piston rod 300 , a displacement sensor 400 and a magnetic ring structure 600 .

[0035] The interior of the cylinder body 100 defines an oil chamber 200, and an inner wall of the oil chamber 200 is provided with a mounting hole 500. The piston rod 300 is slidably mounted inside the oil chamber 200, and a portion of the piston rod 300 is located outside the cylinder body 100. The displacement sensor 400 is fixedly mounted in the piston rod 300, and the magnetic ring structure 600 is mounted in the mounting hole 500. The piston rod 300 partially passes through the magnetic ring structure 600 and extends into the mounting hole 500.

[0036] See Figure 1 As shown, the present application installs the displacement sensor 400 on the piston rod 300 located inside the oil chamber 200, and the magnetic ring structure 600 is installed in the mounting hole 500 inside the cylinder body 100, and part of the displacement sensor 400 passes through the magnetic ring structure 600 and penetrates into the mounting hole 500, so that when the piston rod 300 moves axially, it can synchronously drive the displacement sensor 400 to move, thereby changing the position between the displacement sensor 400 and the magnetic ring structure 600. The position difference can be detected by the displacement sensor 400, and then the distance moved by the piston rod 300 can be obtained, thereby achieving accurate measurement.

[0037] In this embodiment, since the displacement sensor 400 is arranged inside the piston rod 300, the space occupied by the entire cylinder is reduced. Compared with the traditional AGC cylinder, the cylinder body 100 can be directly connected to the pushed object and installed, so that it can be installed in a smaller space.

[0038] Exemplarily, the displacement sensor 400 is a magnetostrictive displacement sensor.

[0039] The cylinder body 100 includes a receiving member 110 and a closing member 120 . The receiving member 110 is fixedly connected to the closing member 120 . The receiving member 110 and the closing member 120 define the oil chamber 200 .

[0040] See Figure 1 As shown, the cylinder body 100 is composed of a accommodating member 110 and a closing member 120, wherein a cavity is opened inside the accommodating member 110, and the opening of the cavity is fixedly installed with the closing member 120. For this reason, the accommodating member 110 and the closing member 120 define an oil chamber 200. The oil chamber 200 is mainly used to allow the piston rod 300 to slide inside it. Specifically, a through hole is opened at the center of the closing member 120. The function of the through hole is mainly to slide with the piston rod 300. When the piston rod 300 moves, its protruding end can slide out in the through hole, thereby achieving avoidance of the piston rod 300.

[0041] In this embodiment, the closing member 120 is a closing cover, which can be fixedly connected to the receiving member 110 by using bolts.

[0042] The container 110 is provided with an oil inlet and outlet structure 700 , which includes a first oil hole 710 and a second oil hole 720 opened on the container 110 . Both the first oil hole 710 and the second oil hole 720 are connected to the oil chamber 200 .

[0043] Please continue reading Figure 1 As shown, in order to enable the piston rod 300 to move, a first oil hole 710 and a second oil hole 720 are opened on the container 110, wherein one of the first oil hole 710 and the second oil hole 720 is for oil inlet and the other one is for oil outlet. Figure 1 From a perspective, it can be set here that when oil enters the first oil hole 710, the piston rod 300 is driven to move to the left, and at this time, the second oil hole 720 discharges oil. If oil enters the second oil hole 720, the piston rod 300 is driven to move to the right.

[0044] Furthermore, in order to accurately control the amount of oil inlet and outlet, a servo valve can be installed to control the amount of oil inlet and outlet, thereby achieving accurate control of the movement distance of the piston rod 300.

[0045] The piston rod 300 includes a rod body 310, and an installation cavity 330 is respectively opened inside the rod body 310 along its axial direction. The opening of the installation cavity 330 is connected to a pressure cover 320, and a first avoidance hole 340 is opened through the pressure cover 320, and the first avoidance hole 340 is connected to the installation cavity 330. A second avoidance hole 350 is opened through the end of the installation cavity 330 away from the pressure cover 320, and the second avoidance hole 350 is connected to the installation cavity 330.

[0046] The displacement sensor 400 includes a sensing member 410 , a mounting member 420 is provided on the sensing member 410 , and a signal line 430 is installed at an end of the sensing member 410 .

[0047] See Figure 1 、 Figure 2 and Figure 3 As shown, in order to realize the installation of the displacement sensor 400, a mounting cavity 330 and a second avoidance hole 350 are opened inside the rod body 310, and the mounting cavity 330 is connected to the second avoidance hole 350. Specifically, the mounting cavity 330 is used to accommodate the mounting member 420 of the displacement sensor 400. The mounting cavity 330 is a stepped hole, and the stepped surface of the stepped hole is used to position the mounting member 420. Next, in order to fix the sensing member 410, the mounting member 420 and the rod body 310, a pressure cover 320 is installed at the opening of the mounting cavity 330, and a first pressure cover 320 is opened at the center of the pressure cover 320. Avoidance hole 340, the mounting part 420 is installed on the first avoidance hole 340, and the pressure cover 320 is installed at the opening position of the installation cavity 330. At this time, the mounting part 420 and part of the sensing part 410 are located in the installation cavity 330, and the sensing part 410 extends through the first avoidance hole 340 to the installation hole 500. In order to enable the signal line 430 to extend to the outside to transmit the detected signal, a second avoidance hole 350 is opened through the inner wall of the installation cavity 330 away from the pressure cover 320, that is, the signal line 430 passes through the second avoidance hole 350 to be connected to the external equipment.

[0048] In this embodiment, the sensing component 410 is composed of a wave generator and a waveguide tube. The waveguide tube and the magnetic ring structure 600 transmit the wave to the wave generator. The wave generator transmits the signal to the outside through the signal line 430. The waveguide tube passes through the first avoidance hole 340 and the magnetic ring structure 600 and penetrates into the mounting hole 500. The wave generator is connected to the mounting component 420. To this end, the sensor is fixed by connecting the mounting component 420 with the first avoidance hole 340. Furthermore, the outer surface of the mounting component 420 has an external thread, and the inner wall of the first avoidance hole 340 can be provided with an internal thread. The mounting component 420 and the first avoidance hole 340 are threadedly connected. Furthermore, the pressure cover 320 can also be connected to the opening of the mounting cavity 330 by a threaded connection.

[0049] The rod body 310 includes a first sliding portion 311 and a second sliding portion 312 . The mounting cavity 330 is defined in the first sliding portion 311 , and the second avoidance hole 350 is defined in the second sliding portion 312 .

[0050] See Figure 1 and Figure 2 As shown, the rod body 310 is composed of a first sliding part 311 and a second sliding part 312, and the first sliding part 311 and the second sliding part 312 are integrally formed. Specifically, the second sliding part 312 is slidingly connected to the through hole of the closure member 120, and the first sliding part 311 is slidingly connected to the inner wall of the oil chamber 200.

[0051] A first sealing member 360 is provided between the gland 320 and the inner wall of the gland 320 .

[0052] See Figure 2 As shown, in order to prevent the hydraulic pressure in the oil chamber 200 from entering the mounting chamber 330 , a first sealing member 360 is provided between the pressure cover 320 and the first sliding portion 311 for sealing.

[0053] Exemplarily, the first sealing member 360 is a sealing ring, which may be an O-ring, a V-ring, etc. In practice, the sealing ring may be selected according to actual needs.

[0054] The magnetic ring structure 600 includes a washer 610 arranged in the mounting hole 500, a magnetic ring body 620 is arranged on one side of the washer 610, and a pressure ring 630 is arranged at the opening of the mounting hole 500, wherein the magnetic ring body 620 is located between the washer 610 and the pressure ring 630.

[0055] See Figure 4 As shown, in order to enable the displacement sensor 400 to accurately detect the moving distance of the piston rod 300, a mounting hole 500 connected to the oil chamber 200 is opened inside the accommodating part 110, and a gasket 610, a magnetic ring body 620 and a pressure ring 630 are installed in sequence at the exit position of the mounting hole 500. The gasket 610 is used to abut the magnetic ring body 620 to prevent the end face of the magnetic ring body 620 from contacting the accommodating part 110 and causing damage. The pressure ring 630 is used to limit the magnetic ring body 620 to prevent the magnetic ring body 620 from escaping from the mounting hole 500.

[0056] In this embodiment, the mounting hole 500 is a stepped hole with a step, and the end face of the gasket 610 abuts against the stepped surface of the stepped hole for positioning, and the inner holes of the gasket 610, the magnetic ring body 620 and the pressure ring 630 can be equal to the inner hole of the mounting hole 500, so as to facilitate the sensing part 410 to partially pass through the pressure ring 630, the magnetic ring body 620 and the gasket 610 and enter the mounting hole 500. Specifically, the waveguide tube of the sensing part 410 passes through the pressure ring 630, the magnetic ring body 620 and the gasket 610 and enters the mounting hole 500. The waveguide tube of the sensing part 410 moves relative to the magnetic ring body 620 to enable the wave generator to generate a signal, and finally transmits the distance signal to the outside through the signal line 430, thereby realizing the detection of the position movement of the piston rod 300.

[0057] A second sealing member 800 is provided between the piston rod 300 and the inner wall of the oil chamber 200 .

[0058] Please continue reading Figure 1As shown, in order to prevent the oil chambers 200 on both sides of the piston rod 300 from communicating, a second sealing member 800 is provided between the first sliding portion 311 and the inner wall of the oil chamber 200 , thereby improving the sealing performance.

[0059] Specifically, a sealing member is also provided between the second sliding portion 312 and the through hole of the closing member 120 .

[0060] Illustratively, the second sealing member 800 may be a sealing ring, such as an O-ring, a V-ring, etc., which may be selected according to actual needs and is not limited here.

[0061] The present application also provides a rolling device, comprising the automatic thickness control cylinder described in any one of the above items.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An automatic thickness control cylinder, characterized in that: include: A cylinder body (100), wherein an oil chamber (200) is defined inside the cylinder body (100), and a mounting hole (500) is formed on an inner wall of the oil chamber (200); a piston rod (300), wherein the piston rod (300) is slidably mounted inside the oil chamber (200), and a portion of the piston rod (300) is located outside the cylinder body (100); a displacement sensor (400), the displacement sensor (400) being fixedly mounted in the piston rod (300); A magnetic ring structure (600) is installed in the installation hole (500), and the piston rod (300) partially passes through the magnetic ring structure (600) and penetrates into the installation hole (500).

2. The automatic thickness control cylinder according to claim 1, characterized in that: The cylinder body (100) comprises a receiving member (110) and a closing member (120), wherein the receiving member (110) is fixedly connected to the closing member (120), and the receiving member (110) and the closing member (120) define and form the oil chamber (200).

3. The automatic thickness control cylinder according to claim 2, characterized in that: The container (110) is provided with an oil inlet and outlet structure (700), and the oil inlet and outlet structure (700) includes a first oil hole (710) and a second oil hole (720) opened on the container (110), and the first oil hole (710) and the second oil hole (720) are both communicated with the oil cavity (200).

4. The automatic thickness control cylinder according to claim 1, characterized in that: The piston rod (300) includes a rod body (310), and the rod body (310) is provided with mounting cavities (330) along its axial direction. The opening of the mounting cavity (330) is connected to a pressure cover (320), and a first avoidance hole (340) is provided through the pressure cover (320), and the first avoidance hole (340) is communicated with the mounting cavity (330). The end of the mounting cavity (330) away from the pressure cover (320) is provided with a second avoidance hole (350), and the second avoidance hole (350) is communicated with the mounting cavity (330).

5. The automatic thickness control cylinder according to claim 4, characterized in that: The rod body (310) comprises a first sliding portion (311) and a second sliding portion (312); the mounting cavity (330) is provided in the first sliding portion (311); and the second avoidance hole (350) is provided in the second sliding portion (312).

6. The automatic thickness control cylinder according to claim 4, characterized in that: A first sealing member (360) is provided between the gland (320) and the inner wall of the gland (320).

7. The automatic thickness control cylinder according to claim 1, characterized in that: The displacement sensor (400) comprises a sensing member (410), a mounting member (420) is provided on the sensing member (410), and a signal line (430) is mounted on the end of the sensing member (410).

8. The automatic thickness control cylinder according to claim 1, characterized in that: The magnetic ring structure (600) includes a washer (610) arranged in the mounting hole (500), a magnetic ring body (620) is arranged on one side of the washer (610), and a pressure ring (630) is arranged at the opening of the mounting hole (500), wherein the magnetic ring body (620) is located between the washer (610) and the pressure ring (630).

9. The automatic thickness control cylinder according to claim 1, characterized in that: A second sealing member (800) is provided between the piston rod (300) and the inner wall of the oil chamber (200).

10. A rolling device, characterized in that: The automatic thickness control cylinder comprises the automatic thickness control cylinder according to any one of claims 1 to 9.

Images