Protective cover of finishing mill

Abstract

The utility model discloses a finishing mill protective cover which is arranged outside a civil foundation of a finishing mill, the finishing mill protective cover comprises a rotary arm and a protective cover body detachably connected to the rotary arm, and the rotary arm is supported by at least two bearing seats. One end of the rotary arm is connected with a planetary reducer through a coupler, and the planetary reducer is connected with a driving motor; under the driving of the driving motor, the rotary arm rotates by a preset angle, so that the protective cover moves from an opening position to a closing position, or the protective cover moves from the closing position to the opening position; at the closing position, the protective cover is positioned above the finishing mill; and at the opening position, the protective cover is located on the side, deviating from the finishing mill, of the rotation center line of the rotation arm. The finishing mill protection cover has the advantages that the size of a foundation pit of the finishing mill is reduced, the construction cost is saved, the power transmission structure and control are simple, and safety is high.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to a protective cover for a finishing mill. Background Technology

[0002] The finishing mill is a high-speed rolling mill used in high-speed wire rod and high-speed bar production lines. It is typically used in the pre-finishing, finishing, and sizing areas of high-speed wire rod and bar workshops. The finishing mill is a cantilevered roll ring mill with a 45° top-to-bottom arrangement. The roll rings of the finishing mill are usually made of tungsten carbide and require high-pressure water cooling during rolling to reduce their temperature and extend their lifespan. The pressure of the cooling water is approximately 6-7 bar. The high-pressure water is sprayed onto the high-speed rotating roll rings, creating a splashing effect. The protective cover is positioned directly above the finishing mill, forming a closed space with the baffles installed around the mill to block the splashing cooling water and protect the operating environment of the production area.

[0003] In existing technologies, hydraulic cylinders are often used to drive the protective cover. Specifically, two sets of hydraulic cylinders are distributed on both sides of the driving side of the protective cover to drive the swing arm to rotate. The protective cover is fixed on the swing arm and rotates with the swing arm to achieve opening and closing. Utility Model Content

[0004] The utility model applicant's research found that the existing technical solution of using a hydraulic cylinder to drive the protective cover has the following problems:

[0005] The protective cover is driven by two completely independent hydraulic cylinders. Although a crossbeam is assembled between the two swing arms to achieve mechanical synchronization, the hydraulic synchronization control cannot completely achieve ideal synchronization. During the opening and closing process of the protective cover, the force exerted by the swing arms on the protective cover is not synchronized, and the protective cover is prone to twisting and deformation.

[0006] Hydraulic cylinder-driven protective covers pose certain operational risks. During the opening or closing process, a sudden loss of pressure for some reason can cause the protective cover to fall down. As an improvement, a hydraulically controlled check valve was added to the oil inlet line for pressure loss protection. However, during opening and closing, hydraulic fluctuations can cause low-frequency vibrations in the protective cover.

[0007] Hydraulic cylinders require separate hydraulic valve stations. In some areas, apart from the protective cover, there are no other hydraulic devices, so a separate hydraulic valve station needs to be designed for the protective cover, which increases the design cost.

[0008] The base supporting the swing arm occupies space in the equipment area, especially the mill protective cover in the sizing and reducing area. In order to leave room for operation, the distance between the two bases must be increased, which leads to the expansion of the civil engineering foundation pit.

[0009] The purpose of this invention is to provide a protective cover for a finishing mill, which solves at least one of the above-mentioned problems.

[0010] The above-mentioned purposes of the utility model can be realized by the following technical solutions.

[0011] The utility model provides a finishing mill protective cover, the finishing mill protective cover sets up in the civil engineering foundation outside finishing mill, the finishing mill protective cover includes rotary arm and the protective cover of detachable connection on rotary arm, rotary arm is supported by at least two bearing seats, one end of rotary arm is connected with planetary reducer through coupling, drive motor is connected on planetary reducer, under the drive of drive motor, rotary arm rotates the preset angle, so that the protective cover moves from the opening position to the closed position, or, so that the protective cover moves from the closed position to the opening position, in the closed position, the protective cover is located above the finishing mill, in the opening position, the protective cover is located in the rotary center line of rotary arm and deviates from one side of finishing mill.

[0012] Preferably, the rotary arm includes a rotary shaft and at least two support arms fixedly connected to the rotary shaft, the protective cover is detachably connected to the rotary shaft through the at least two support arms, the rotary shaft is installed on the at least two bearing seats, and one end of the rotary shaft is sequentially connected to the coupling, the planetary reducer and the drive motor.

[0013] Preferably, the finishing mill protective cover further includes a locking assembly for mechanically protecting the protective cover in the opening position or the closed position.

[0014] Preferably, the locking assembly includes a locking plate having a closed position pin hole and an open position pin hole, a gantry support having a locking pin hole, and a safety bolt for connecting the locking plate and the gantry support, the locking plate is fixedly connected to the rotary shaft, and the gantry supports are symmetrically arranged on both sides of the rotary shaft and matched with the locking plate; in the opening position, the open position pin hole is aligned with the locking pin hole of one of the gantry supports, so that the safety bolt is inserted and forms mechanical protection for the protective cover in the opening position; in the closed position, the closed position pin hole is aligned with the locking pin hole of the other gantry support, so that the safety bolt is inserted and forms mechanical protection for the protective cover in the closed position.

[0015] Preferably, the locking plate is provided with a closing position limiting block and an opening position limiting block, and correspondingly, the portal support is provided with a buffer; during alignment of the opening position pin hole with the locking pin hole of one of the portal supports, the opening position limiting block contacts and compresses the buffer of the portal support until the opening position pin hole is aligned with the locking pin hole of the portal support; during alignment of the closing position pin hole with the locking pin hole of the other portal support, the closing position limiting block contacts and compresses the buffer of the portal support until the closing position pin hole is aligned with the locking pin hole of the portal support.

[0016] Preferably, the locking plate is provided with a closing position limiting block and an opening position limiting block, and correspondingly, the portal support is provided with a buffer; during alignment of the opening position pin hole with the locking pin hole of one of the portal supports, the opening position limiting block contacts and compresses the buffer of the portal support until the opening position pin hole is aligned with the locking pin hole of the portal support; during alignment of the closing position pin hole with the locking pin hole of the other portal support, the closing position limiting block contacts and compresses the buffer of the portal support until the closing position pin hole is aligned with the locking pin hole of the portal support.

[0017] Preferably, the portal support is provided with a proximity switch electrically connected with the driving motor, and correspondingly, the locking plate is provided with a closing position sensing block and an opening position sensing block; the proximity switch can detect the opening position sensing block when the protective cover moves to the open position and send a stop signal to the driving motor, and can detect the closing position sensing block when the protective cover moves to the closed position and send a stop signal to the driving motor.

[0018] Preferably, the protective cover is provided with an L-shaped stop portion, and in the closed position, the L-shaped stop portion abuts against the top surface of the water baffle of the finishing mill and forms a labyrinth seal.

[0019] Preferably, the preset angle of rotation of the rotary arm is not less than 95°.

[0020] Preferably, the driving motor is arranged perpendicularly to the rotary shaft.

[0021] The characteristics and advantages of the utility model are: the utility model embodiment provides the finishing mill protective cover is arranged on the civil engineering foundation of finishing mill, does not need to occupy the space of finishing mill body area, has the characteristics of reducing the size of finishing mill foundation pit, saving construction cost; the finishing mill protective cover is driven by the driving motor and is transmitted through the planetary reducer, does not need to construct hydraulic station, and the power transmission structure and control are simple, and low-speed large torque power transmission can be realized; the protective cover in the open position is located on the side of the rotary center line of rotary arm away from the finishing mill, to ensure that the falling position of the protective cover is separated from the operating position of the finishing mill on the side of the closed position of the protective cover, and the safety of the operator is protected. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0023] Figure 1 A structure schematic view of the finishing mill protective cover provided in the embodiments of the present application is shown in the figure.

[0024] Figure 2 A connection schematic view of the locking plate and the rotary arm in the finishing mill protective cover provided in the embodiments of the present application is shown in the figure.

[0025] Figure 3 A structure schematic view of the finishing mill protective cover in the open state provided in the embodiments of the present application is shown in the figure.

[0026] Figure 4 A structure schematic view of the finishing mill protective cover in the closed state provided in the embodiments of the present application is shown in the figure.

[0027] Figure 5 A state schematic view of the finishing mill protective cover in the open position provided in the embodiments of the present application is shown in the figure.

[0028] Figure 6 A state schematic view of the finishing mill protective cover in the closed position provided in the embodiments of the present application is shown in the figure.

[0029] Figure 7 A structure schematic view of the finishing mill protective cover provided in the embodiments of the present application is shown in the figure. Figure 6 A partial enlarged view A of the figure.

[0030] Explanation of the figure reference numerals:

[0031] 100, finishing mill protective cover; 200, finishing mill;

[0032] 1, rotary arm; 11, rotary shaft; 12, support arm;

[0033] 2, protective cover; 21, L-shaped stopper; 22, rubber pad;

[0034] 3, bearing seat;

[0035] 4, planetary reducer;

[0036] 5, driving motor;

[0037] 6, fixed seat;

[0038] 7. Locking plate; 71. Closed position pin hole; 72. Open position pin hole; 73. Closed position limit block; 74. Open position limit block; 75. Closed position sensor block; 76. Open position sensor block;

[0039] 8. Gantry support; 81. Buffer; 82. Proximity switch;

[0040] 9. Safety pin. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] like Figures 1 to 6 As shown, this utility model provides a protective cover 100 for a finishing mill. This protective cover 100 is installed outside the civil engineering foundation of the finishing mill 200, without occupying space in the main body area of ​​the finishing mill 200, thus reducing the size of the finishing mill 200 foundation pit and saving construction costs. The protective cover 100 includes a rotating arm 1 and a protective cover 2 detachably connected to the rotating arm 1. The rotating arm 1 is supported by at least two bearing seats 3. One end of the rotating arm 1 is connected to a planetary reducer 4 via a coupling. A drive motor 5 is connected to the planetary reducer 4, which is supported by a fixed base 6. Thus, the drive motor 5 provides the driving force, and the transmission is achieved through the planetary reducer 4. No hydraulic station is required, the power transmission structure and control are simple, and low-speed, high-torque power transmission can be achieved. Preferably, the drive motor 5 is a bidirectional rotary motor with electromagnetic braking to meet the switching needs of opening and closing the protective cover 2, as well as the parking needs of the protective cover 2 in the open and closed positions. Driven by the drive motor 5, the rotary arm 1 rotates by a preset angle, causing the protective cover 2 to move from the open position to the closed position, or vice versa; Figure 6 As shown, in the closed position, the protective cover 2 is located above the finishing mill 200; as Figure 5As shown, in the open position, the protective cover 2 is located on the side of the rotary arm 1 away from the finishing mill 200 along its rotation center line. For example, under the forward drive of the drive motor 5, the rotary arm 1 rotates a preset angle toward the side where the finishing mill 200 is located, causing the protective cover 2 to move from the open position to the closed position. At this time, the protective cover 2 is located above the finishing mill 200 and forms a closed space with the baffles installed around the finishing mill 200, thus preventing the cooling water from splashing from the finishing mill 200 and preventing high-speed red-hot steel from flying out and injuring people, thereby protecting the operating environment of the production site and providing safety for on-site operators. Under the reverse drive of the drive motor 5, the rotary arm 1 rotates a preset angle toward the side away from the finishing mill 200, causing the protective cover 2 to move from the closed position to the open position. At this time, the protective cover 2 is located on the side of the rotary arm 1 away from the finishing mill 200 along its rotation center line, ensuring that the falling position of the protective cover 2 is separate from the operating position of the finishing mill 200 on the closed position side of the protective cover 2, protecting the safety of the operators.

[0043] According to a preferred embodiment of the present invention, the preset angle of rotation of the rotary arm 1 is not less than 95°, so as to ensure that the protective cover 2 that suddenly falls falls completely outside the operating position of the finishing mill 200.

[0044] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the drive motor 5 is positioned perpendicular to the rotary shaft 11. This effectively shortens the overall shaft length and facilitates the arrangement of surrounding equipment.

[0045] According to a preferred embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the rotary arm 1 includes a rotary shaft 11 and at least two support arms 12 fixedly connected to the rotary shaft 11. The protective cover 2 is detachably connected to the rotary shaft 11 via the at least two support arms 12 for easy maintenance and replacement. The rotary shaft 11 is mounted on at least two bearing seats 3, and one end of the rotary shaft 11 is sequentially connected to a coupling, a planetary reducer 4, and a drive motor 5. Since the rotary shaft 11 is relatively long, it will experience some bending and deformation. Therefore, the rotary shaft 11 is connected to the bearing seats 3 via spherical roller bearings with strong self-aligning capabilities. The spherical roller bearings are manually lubricated periodically to ensure good performance. The at least two support arms 12 are fixedly connected to the rotary shaft 11 by welding. Preferably, the planetary reducer 4 is connected to the rotary shaft 11 via a drum gear coupling to improve installation compatibility.

[0046] According to a preferred embodiment of the present invention, the finishing mill protective cover 100 further includes a locking component, which is used to mechanically protect the protective cover 2 when it is in the open or closed position, so as to effectively maintain the open or closed state of the protective cover 2.

[0047] According to a preferred embodiment of the present invention, the locking assembly includes a locking plate 7 having a closed position pin hole 71 and an open position pin hole 72, a gantry support 8 having a locking pin hole, and a safety pin 9 for connecting the locking plate 7 and the gantry support 8. The locking plate 7 is fixedly connected to a rotating shaft 11, and gantry supports 8 are symmetrically arranged on both sides of the rotating shaft 11 to cooperate with the locking plate 7. In the open position, the open position pin hole 72 is aligned with the locking pin hole of one of the gantry supports 8, allowing the safety pin 9 to be inserted and forming mechanical protection for the protective cover 2 in the open position. In the closed position, the closed position pin hole 71 is aligned with the locking pin hole of the other gantry support 8, allowing the safety pin 9 to be inserted and forming mechanical protection for the protective cover 2 in the closed position. For example, as shown... Figure 1 and Figure 2 As shown, along the axial direction of the rotating shaft 11, the locking plate 7 is fixedly connected to the shaft section of the rotating shaft 11 located between the uprights of the gantry support 8. The locking plate 7 has a closed position pin hole 71 and an open position pin hole 72 respectively on opposite sides of the rotating shaft 11. In the open position, the locking pin hole of the gantry support 8 located near the open position pin hole 72 is aligned with the open position pin hole 72, and the protective cover 2 can be mechanically locked in the open position by inserting the safety pin 9. In the closed position, the locking pin hole of the gantry support 8 located near the closed position pin hole 71 is aligned with the closed position pin hole 71, and the protective cover 2 can be mechanically locked in the closed position by inserting the safety pin 9. It should be noted that the safety pin 9 can be inserted and removed by an operator or automatically by an electrical control signal. To reduce safety hazards during the use of the finishing mill protective cover 100, in this embodiment, the safety pin 9 is inserted and removed by an operator.

[0048] According to a preferred embodiment of the present invention, the locking plate 7 is provided with a closed position limiting block 73 and an open position limiting block 74, and correspondingly, the gantry support 8 is provided with a buffer 81; during the process of aligning the open position pin hole 72 with the locking pin hole of one of the gantry supports 8, the open position limiting block 74 contacts and compresses the buffer 81 on the gantry support 8 until the open position pin hole 72 is aligned with the locking pin hole of the gantry support 8; during the process of aligning the closed position pin hole 71 with the locking pin hole of the other gantry support 8, the closed position limiting block 73 contacts and compresses the buffer 81 on the gantry support 8 until the closed position pin hole 71 is aligned with the locking pin hole of the gantry support 8. By installing a buffer 81 on the gantry support 8, and correspondingly installing an open-position limit block 74 that contacts the buffer 81 in the open position and a closed-position limit block 73 that contacts the buffer 81 in the closed position on the locking plate 7, the inertia and impact of the protective cover 2 when it stops rotating are buffered and absorbed, thus extending the service life of the finishing mill protective cover 100. For example, as shown... Figures 1 to 4As shown, the locking plate 7 is provided with a closed position limit block 73 and an open position limit block 74 on the plate surfaces on opposite sides of the rotating shaft 11. The top of the gantry support 8 is threadedly connected to a buffer 81. The buffer 81 has a downwardly extending buffer part. During the process of the protective cover 2 moving from the open position to the closed position, the buffer part of the buffer 81 connected to the gantry support 8 near the open position pin hole 72 returns to the initial state from the contracted state compressed by the open position limit block 74. The buffer part of the buffer 81 connected to the gantry support 8 near the closed position pin hole 71 is compressed from the initial state to the contracted state by the closed position limit block 73 after contacting the closed position limit block.

[0049] According to a preferred embodiment of the present invention, such as Figure 1 and Figure 2 As shown, in order to obtain better mechanical strength, there are two locking plates 7. Along the axis of the rotating shaft 11, the two locking plates 7 are spaced apart and located between the uprights of the gantry support 8. The closed position limit block 73 and the open position limit block 74 are connected between the two locking plates 7.

[0050] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the gantry support 8 is equipped with a proximity switch 82 that is electrically connected to the drive motor 5. Correspondingly, the locking plate 7 is equipped with a closed position sensing block 75 and an open position sensing block 76. The proximity switch 82 can detect the open position sensing block 76 and send a stop signal to the drive motor 5 when the protective cover 2 moves to the open position, and can detect the closed position sensing block 75 and send a stop signal to the drive motor 5 when the protective cover 2 moves to the closed position. After receiving the stop signal, the drive motor 5 starts the electromagnetic brake to realize the brake stop of the drive motor 5.

[0051] According to a preferred embodiment of the present invention, see also [reference needed]. Figure 7 As shown, the protective cover 2 is provided with an L-shaped stop 21. In the closed position, the L-shaped stop 21 abuts against the top surface of the baffle plate circumferentially around the finishing mill 200 and forms a labyrinth seal to achieve better prevention of cooling water splashing from the finishing mill 200. Preferably, a rubber pad 22 is provided on the surface of the L-shaped stop 21 that abuts against the top surface of the baffle plate circumferentially around the finishing mill 200 to cushion the impact on the baffle plate circumferentially around the finishing mill 200 when the protective cover 2 is closed.

[0052] Based on the above description, the finishing mill protective cover 100 provided in this embodiment of the present invention has the following beneficial effects:

[0053] The finishing mill protective cover 100 provided in this embodiment is installed outside the civil engineering foundation of the finishing mill 200, without occupying space in the main body area of ​​the finishing mill 200, thus reducing the size of the finishing mill 200 foundation pit and saving construction costs. The finishing mill protective cover 100 is driven by a drive motor 5 and transmitted through a planetary reducer 4, eliminating the need for a hydraulic station. The power transmission structure and control are simple, and it can achieve low-speed, high-torque power transmission. The protective cover 2 in the open position is located on the side of the rotation center line of the rotary arm 1 away from the finishing mill 200, to ensure that the falling position of the protective cover 2 is consistent with the protection of the mill. The operating position of the finishing mill 200 on the closed side of the protective cover 2 is separated to protect the safety of the operator; a locking component is provided to effectively maintain the open or closed state of the protective cover 2; at the same time, a buffer 81 is provided to buffer and absorb the inertia and impact when the protective cover 2 stops rotating, extending the service life of the finishing mill protective cover 100; in addition, the protective cover 2 is provided with an L-shaped stop part 21 that abuts against the top surface of the baffle plate circumferentially around the finishing mill 200 in the closed position to form a labyrinth seal, so that the finishing mill protective cover 100 provided in this embodiment of the present invention has a better function of preventing the cooling water of the finishing mill 200 from splashing.

[0054] The above descriptions are merely a few embodiments of this utility model. Those skilled in the art can make various modifications or variations to the embodiments of this utility model based on the content disclosed in the application documents without departing from the spirit and scope of this utility model.

Claims

1. A protective cover for a finishing mill, characterized in that, The protective cover of the finishing mill is installed outside the civil engineering foundation of the finishing mill. The protective cover of the finishing mill includes a rotary arm and a protective cover detachably connected to the rotary arm. The rotary arm is supported by at least two bearing seats. One end of the rotary arm is connected to a planetary reducer through a coupling. A drive motor is connected to the planetary reducer. Driven by the drive motor, the rotary arm rotates by a preset angle, causing the protective cover to move from the open position to the closed position, or vice versa; in the closed position, the protective cover is located above the finishing mill; in the open position, the protective cover is located on the side of the rotary arm's rotation center line away from the finishing mill.

2. The protective cover for a finishing mill according to claim 1, characterized in that, The rotary arm includes a rotary shaft and at least two support arms fixedly connected to the rotary shaft. The protective cover is detachably connected to the rotary shaft through at least two of the support arms. The rotary shaft is mounted on at least two of the bearing seats. One end of the rotary shaft is sequentially connected to the coupling, the planetary reducer, and the drive motor.

3. The protective cover for a finishing mill according to claim 2, characterized in that, The finishing mill protective cover also includes a locking assembly, which is used to mechanically protect the protective cover when it is in the open or closed position.

4. The protective cover for a finishing mill according to claim 3, characterized in that, The locking assembly includes a locking plate with a closed position pin hole and an open position pin hole, a gantry support with a locking pin hole, and a safety pin for connecting the locking plate and the gantry support. The locking plate is fixedly connected to the rotating shaft, and the gantry supports that cooperate with the locking plate are symmetrically arranged on both sides of the rotating shaft. In the open position, the open position pin hole is aligned with the locking pin hole of one of the gantry supports, so that the safety pin can be inserted to form mechanical protection for the protective cover in the open position. In the closed position, the closed position pin hole is aligned with the locking pin hole of the other gantry support, so that the safety pin can be inserted to form mechanical protection for the protective cover in the closed position.

5. The protective cover for a finishing mill according to claim 4, characterized in that, The locking plate is provided with a closed position limit block and an open position limit block. Correspondingly, the gantry support is provided with a buffer. During the process of aligning the open position pin hole with the locking pin hole of one of the gantry supports, the open position limit block contacts and compresses the buffer on the gantry support until the open position pin hole is aligned with the locking pin hole of the gantry support. During the process of aligning the closed position pin hole with the locking pin hole of the other gantry support, the closed position limit block contacts and compresses the buffer on the gantry support until the closed position pin hole is aligned with the locking pin hole of the gantry support.

6. The protective cover for a finishing mill according to claim 5, characterized in that, The locking plates consist of two pieces, which are spaced apart and located between the uprights of the gantry support along the axis of the rotating shaft. The closed position limiting block and the open position limiting block are connected between the two locking plates.

7. The protective cover for a finishing mill according to claim 5, characterized in that, The gantry support is equipped with a proximity switch electrically connected to the drive motor. Correspondingly, the locking plate is equipped with a closed position sensing block and an open position sensing block. The proximity switch can detect the open position sensing block and send a stop signal to the drive motor when the protective cover moves to the open position, and can also detect the closed position sensing block and send a stop signal to the drive motor when the protective cover moves to the closed position.

8. The protective cover for a finishing mill according to claim 1, characterized in that, The protective cover is provided with an L-shaped stop. In the closed position, the L-shaped stop abuts against the top surface of the water baffle plate circumferentially of the finishing mill and forms a labyrinth seal.

9. The protective cover for a finishing mill according to claim 1, characterized in that, The preset angle of rotation of the slewing arm is not less than 95°.

10. The protective cover for a finishing mill according to claim 2, characterized in that, The drive motor is positioned perpendicular to the rotation shaft.

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