Novel high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure

Abstract

The utility model discloses a novel high-speed heavy rail rolling mill servo hydraulic cylinder with a built-in sensor protection structure, which comprises a cylinder body, a cylinder cover, a piston, a cover plate and a displacement sensor, the cylinder cover is covered on the cylinder body, the piston is arranged in the cylinder body, the upper end of the piston extends out of the cylinder cover, the cover plate is covered above the piston, and the displacement sensor is arranged in the cylinder cover. The displacement sensor is arranged in a sensor containing cavity hole in the piston, a first installation groove is formed in the upper end of the piston, a second installation groove is formed in the cover plate, a bearing plate is arranged in the second installation groove, and the lower end of the bearing plate penetrates through the cover plate, is arranged in the first installation groove of the piston and is fixedly connected with the piston through a connecting piece. A first annular sealing piece is arranged between the side face of the bearing plate and the cover plate, an annular step is arranged on the side face of the bearing plate, the bearing plate is arranged on the first installation groove through the annular step, and a second annular sealing piece is arranged between the annular step face and the first installation groove of the cover plate. The displacement sensor is prevented from being frequently damaged, and the service life of the displacement sensor is prolonged.

Description

Technical Field

[0001] The utility model specifically relates to a high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure. Background Art

[0002] The pressing up, pressing down and axial adjustment system of the high-speed heavy rail servo hydraulic cylinder adopts an automatic control system, which plays the role of transmitting power and adjusting the roll gap. Usually, a displacement sensor is set on the servo hydraulic cylinder. The displacement sensor is used to feedback the expansion and contraction amount of the hydraulic cylinder in real time, and then form a closed-loop control with the electro-hydraulic follow-up control system. Therefore, the service life and reliability of the position sensor directly affect the rolling accuracy of the rail beam. At present, the displacement sensor of the servo hydraulic cylinder is usually installed inside the piston rod, and the collected data is fed back to the control system through the lead wire.

[0003] The operating environments of the servo hydraulic cylinder are usually relatively harsh. When a high-speed heavy rail rolling mill is running, a large amount of cooling water is used to cool the rollers, resulting in a large amount of water mixed with slag constantly impacting the piston rod of the servo hydraulic cylinder. In addition, the high ambient temperature causes the built-in displacement sensor to be corroded by water vapor and slag entering through the pressure plate, corroding the electronic components in the sensor, greatly reducing the service life of the built-in displacement sensor. Once the built-in sensor is damaged, the machine must be shut down for replacement, which greatly increases the maintenance cost. To solve this problem, the utility model proposes a servo hydraulic cylinder with a built-in displacement sensor protection structure. Summary of the invention

[0004] The utility model aims to provide a high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure, so as to avoid frequent damage to the displacement sensor and prolong the service life of the displacement sensor.

[0005] The technical solution adopted by the utility model is:

[0006] A high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure comprises a cylinder body, a cylinder head, a piston, a cover plate and a displacement sensor, wherein the cylinder head is arranged on the cylinder body, the piston is arranged in the cylinder body, the upper end of the piston extends out of the cylinder head, the cover plate is arranged above the piston, the cover plate is connected and fixed to the cylinder head or the cylinder body through a connecting piece, the displacement sensor is arranged in a sensor cavity hole on the piston, and the cylinder head is connected to the cylinder body through a stop and a connecting piece;

[0007] A first mounting groove is provided on the upper end of the piston, a second mounting groove is provided on the cover plate, a pressure plate is provided in the second mounting groove, the lower end of the pressure plate passes through the cover plate and is arranged in the first mounting groove of the piston, and is connected and fixed to the piston by a connecting piece, a first annular seal is provided between the side surface of the pressure plate and the cover plate, an annular step is provided on the side surface of the pressure plate, the pressure plate is arranged on the first mounting groove through the annular step, and a second annular seal is provided between the annular step surface and the first mounting groove of the cover plate; the first annular seal and the second annular seal are respectively a shaft seal static seal and an end seal static seal, so that two sealed spaces are formed between the pressure plate and the cover plate, which are used to prevent water vapor and oxide slag from entering the sensor cavity.

[0008] Preferably, the pressure plate is provided with two top screw holes, and when the top screw holes are not in use, screw plugs are provided in the top screw holes, and the screw plugs are used for sealing.

[0009] Preferably, an annular sealing groove is provided on the side surface of the pressure plate, and the first annular sealing member is provided in the annular sealing groove.

[0010] Preferably, the first annular seal is a K35 type shaft seal static seal; the K35 type shaft seal static seal is made of hydrolysis-resistant polyurethane and has a V-shaped cross-section.

[0011] Preferably, an end seal static sealing groove is provided at the bottom of the second installation groove, and the second annular sealing member is arranged in the end seal static sealing groove.

[0012] Preferably, the second annular sealing member is a square end-seal static sealing ring, and the end-seal static sealing ring is made of hydrolysis-resistant polyurethane.

[0013] Preferably, an end face sealing structure is arranged between the cover plate and the upper end of the piston; a static sealing installation groove is provided on the piston, and an O-ring is installed in the installation groove to prevent water vapor and oxide slag from entering the sensor cavity from between the cover plate and the piston. The cover plate is fixed above the piston by M12 screws.

[0014] Preferably, the end face sealing structural component is an O-type end seal static seal, a static seal installation groove is provided at the upper end of the piston, and the O-type end seal static seal is arranged in the static seal installation groove.

[0015] Preferably, the diameter of the first mounting groove is Φ 260mm; the diameter of the second installation slot is Φ 280mm.

[0016] Preferably, the cover plate is provided with a sensor wire outlet hole at the side position, the sensor wire outlet hole is connected with a pipe joint, and the outside of the pipe joint is connected with an adjustable right-angle pipe joint, a pagoda joint, and a waterproof protection tube in sequence; the displacement sensor cable comes out of the sensor cavity, the cover plate, the pipe joint, the adjustable right-angle pipe joint, the pagoda joint and the waterproof protection tube in sequence.

[0017] The beneficial effects of the utility model are:

[0018] The utility model uses a first annular seal and a second annular seal as a shaft seal static seal and an end seal static seal respectively, so that two sealed spaces are formed between the pressure plate and the cover plate, which are used to prevent water vapor and oxide slag from entering the sensor cavity, avoid frequent damage to the displacement sensor, and extend the service life of the displacement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure in an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A top view of

[0021] In the figure: 1-cylinder body, 2-piston, 3-cylinder head, 4-displacement sensor, 5-pressure plate, 6-square end seal static seal ring, 7-K35 shaft seal static seal, 8-O-type end seal static seal, 9-cover plate, 10-pipe joint, 11-adjustable right-angle pipe joint, 12-pagoda joint, 13-protective tube. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Example 1

[0026] A new type of high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure, such as Figure 1~2 As shown, it includes a cylinder body 1, a cylinder head 3, a piston 3, a cover plate 9 and a displacement sensor 4. The cylinder head 3 is covered on the cylinder body 1, the piston 3 is arranged in the cylinder body 1, the upper end of the piston 3 extends out of the cylinder head 3, the cover plate 9 is covered on the piston 3, the cover plate 9 is connected and fixed to the cylinder head 3 or the cylinder body 4 through a connecting piece, the displacement sensor 4 is arranged in the sensor cavity hole on the piston 3, and the cylinder head 3 is connected to the cylinder body through a stop and a connecting piece;

[0027] A first mounting groove is provided at the upper end of the piston, a second mounting groove is provided on the cover plate 9, a pressure plate 5 is provided in the second mounting groove, the lower end of the pressure plate 5 passes through the bottom of the second mounting groove of the cover plate 9, is arranged in the first mounting groove of the piston, and is connected and fixed to the piston by a connecting piece, a first annular seal is provided between the side surface of the pressure plate 5 and the cover plate 9, an annular step is provided on the side surface of the pressure plate, the pressure plate is arranged on the first mounting groove through the annular step, and a second annular seal is provided between the annular step surface and the bottom of the first mounting groove of the cover plate 9; the first annular seal and the second annular seal serve as a shaft seal static seal and an end seal static seal, respectively, so that two sealed spaces are formed between the pressure plate and the cover plate to prevent water vapor and oxide slag from entering the sensor cavity.

[0028] Furthermore, the connecting piece includes a common threaded connecting piece, such as a screw or a bolt.

[0029] Furthermore, the diameter of the first mounting groove is Φ 260mm; the diameter of the second installation slot is Φ 280mm.

[0030] Furthermore, the pressure plate is provided with two top screw holes, and when the top screw holes are not in use, screw plugs are provided in the top screw holes, and the screw plugs are used for sealing.

[0031] Furthermore, an annular sealing groove is provided on the side surface of the pressure plate 5, and the first annular sealing member is provided in the annular sealing groove.

[0032] Furthermore, the first annular seal is a K35 type shaft seal static seal; the K35 type shaft seal static seal is made of hydrolysis-resistant polyurethane and has a V-shaped cross-section.

[0033] Furthermore, an end seal static sealing groove is provided at the bottom of the second installation groove, and the second annular sealing member is arranged in the end seal static sealing groove.

[0034] Furthermore, the second annular sealing member is a square end-seal static sealing ring, and the end-seal static sealing ring is made of hydrolysis-resistant polyurethane.

[0035] Furthermore, an end face sealing structure is arranged between the cover plate and the upper end of the piston; a static sealing installation groove is arranged on the piston, and an O-ring is installed in the installation groove to prevent water vapor and oxide slag from entering the sensor cavity from between the cover plate and the piston, and the cover plate is fixed above the piston by M12 screws.

[0036] Furthermore, the end face sealing structural component is an O-type end seal static seal, a static seal installation groove is provided at the upper end of the piston, and the O-type end seal static seal is arranged in the static seal installation groove.

[0037] Example 2

[0038] On the basis of Example 1, a pipe joint, an adjustable right-angle pipe joint, a pagoda joint, and a waterproof protection tube are newly added for limitation. The performance of Example 2 after the limitation is better.

[0039] The cover plate is provided with a sensor wire outlet hole at the side position, the sensor wire outlet hole is connected with a pipe joint, and the outside of the pipe joint is connected with an adjustable right-angle pipe joint, a pagoda joint, and a waterproof protection tube in sequence; the displacement sensor cable comes out from the sensor cavity, the cover plate, the pipe joint, the adjustable right-angle pipe joint, the pagoda joint and the waterproof protection tube in sequence.

[0040] The working principle of the utility model is as follows: Figure 1 to Figure 2 As shown, this example has a horizontal adjustment cylinder with a built-in displacement sensor protection structure, which includes a cylinder body 1, a piston 2, a cylinder head 3, a displacement sensor 4, a pressure plate 5, a square end seal static seal 6, a K35 type shaft seal static seal 7, an O-type end seal static seal 8, a cover plate 9, a pipe joint 10, an adjustable right-angle pipe joint 11, a pagoda joint 12 and a protective tube 13. The piston 2 is placed in the cylinder body 1, and the cylinder head 3 is placed on the cylinder body. The cylinder head 3 is fixed to the cylinder body 1 by screws through the stopper. The upper end of the piston 2 is provided with an M12 threaded hole and a Φ260 mounting groove. The pressure plate 5 is installed in the Φ260 mounting groove and fixed to the piston 2 by M12 screws.

[0041] The pressure bearing plate 5 is provided with two top screw holes, which are sealed by G3 / 4 screw plugs when not in use to prevent the intrusion of water vapor and oxide slag.

[0042] An annular sealing groove is arranged on the side of the pressure-bearing plate 5, in which a K35 type shaft seal static seal 7 is placed. The K35 type shaft seal static seal 7 is made of hydrolysis-resistant polyurethane and has a V-shaped cross-section. The pressure-bearing plate 5 is placed on the cover plate 9, on which a Φ280 mounting groove is arranged, and an end seal static sealing groove is arranged under the mounting groove. A square end seal static sealing ring 6 is placed in the sealing groove. The square end seal static sealing ring 6 is made of hydrolysis-resistant polyurethane. Two sealing spaces are formed between the pressure-bearing plate 5 and the cover plate 9, namely, a shaft seal static seal and an end seal static seal, for preventing water vapor and oxidation slag from entering the sensor cavity.

[0043] An end face seal is arranged between the cover plate 9 and the piston 2, a static seal installation groove is arranged on the piston 2, an O-ring 8 is installed in the installation groove to prevent water vapor and oxide slag from entering the sensor cavity from between the cover plate and the piston, the cover plate 9 is fixed on the top of the piston 2 by M12 screws, the cover plate 9 is provided with a sensor outlet hole at the side position, a G3 / 4 thread is arranged at the outlet hole, the pipe joint 10 is connected to the cover plate 9 by the G3 / 4 thread, the other end of the pipe joint 10 is connected to an adjustable right-angle pipe joint 11, the other end of the adjustable right-angle pipe joint 11 is connected to a pagoda joint 12, the outer side of the pagoda joint 12 is connected to a waterproof protection tube 13, the displacement sensor cable comes out from the sensor cavity, the cover plate 9, the pipe joint 10, the adjustable right-angle pipe joint 11, the pagoda joint 12 and the waterproof protection tube 13 in sequence, which ensures the protection performance of the displacement sensor 4 from the cavity to the outlet of the entire horizontal adjustment cylinder, thereby ensuring the reliability of the displacement sensor in the machine.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A new type of high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure, characterized in that: It comprises a cylinder body (1), a cylinder head, a piston, a cover plate (9) and a displacement sensor (4), wherein the cylinder head is arranged on the cylinder body (1), the piston is arranged in the cylinder body (1), the upper end of the piston extends out of the cylinder head, the cover plate (9) is arranged above the piston, and the displacement sensor (4) is arranged in a sensor cavity hole opened on the piston; A first mounting groove is provided at the upper end of the piston, a second mounting groove is provided on the cover plate (9), a pressure plate (5) is provided in the second mounting groove, the lower end of the pressure plate (5) passes through the cover plate (9) and is provided in the first mounting groove of the piston, a first annular seal is provided between the side surface of the pressure plate (5) and the cover plate (9), an annular step is provided on the side surface of the pressure plate, the pressure plate is provided on the first mounting groove via the annular step, and a second annular seal is provided between the surface of the annular step and the first mounting groove of the cover plate (9).

2. The high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure as claimed in claim 1 is characterized in that: A top screw hole is arranged on the pressure plate. When the top screw hole is not in use, a screw plug is arranged in the top screw hole, and the screw plug is used for sealing.

3. The high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure as claimed in claim 1 is characterized in that: An annular sealing groove is arranged on the side surface of the pressure bearing plate, and the first annular sealing member is arranged in the annular sealing groove.

4. The novel high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure as claimed in claim 3 is characterized by: The first annular seal is a K35 type shaft seal static seal.

5. The high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure as claimed in claim 1 is characterized in that: An end seal static sealing groove is arranged at the bottom of the second installation groove, and the second annular sealing member is arranged in the end seal static sealing groove.

6. The novel high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure as claimed in claim 5, characterized in that: The second annular sealing member is a square end-seal static sealing ring, and the end-seal static sealing ring is made of hydrolysis-resistant polyurethane.

7. The high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure as claimed in claim 1 is characterized by: An end face sealing structural component is arranged between the cover plate and the upper end of the piston.

8. The novel high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure as claimed in claim 7, characterized in that: A static seal installation groove is arranged at the upper end of the piston, and an end face seal structural component is arranged in the static seal installation groove.

9. The novel high-speed heavy rail rolling mill servo hydraulic cylinder with built-in sensor protection structure as claimed in claim 8, characterized in that: The end face sealing structure is an O-type end seal static seal.

10. The high-speed heavy rail rolling mill servo hydraulic cylinder with a novel built-in sensor protection structure according to any one of claims 1 to 9, characterized in that: The cover plate is provided with a sensor wire outlet hole at the side position, the sensor wire outlet hole is connected with a pipe joint, and the outside of the pipe joint is sequentially connected with an adjustable right-angle pipe joint, a pagoda joint, and a waterproof protection tube.

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