Automatic locking device of rolling mill

Abstract

The utility model belongs to the technical field of metallurgical machinery, and particularly relates to an automatic locking device of a rolling mill, which is characterized in that a cylinder rod and a piston are arranged in an inner cavity of a cylinder body in a horizontal sliding manner; the disc springs which are mutually compressed are arranged in the sliding cavity of the disc spring gland, and the disc springs are in contact with the piston and the disc spring gland respectively, so that the disc springs can provide larger pre-tightening force for the rolling mill through the piston and the cylinder rod, and the stability of the rolling mill is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical machinery technology, specifically relating to an automatic locking device for rolling mills. Background Technology

[0002] The existing bar wire rod mill requires four sets of hydraulic locking devices to secure it to the base and prevent axial movement and vertical vibration during rolling. Currently, these locking devices must be pressurized during rolling, requiring the hydraulic pump to operate continuously to ensure proper functioning, resulting in significant energy consumption. Furthermore, due to the harsh production environment, the hydraulic cylinders of the locking devices are prone to corrosion, easily scratching the cylinder seals and causing hydraulic oil leakage.

[0003] Chinese patent document CN219233526U (202320129661.9) discloses a novel locking device for the entrance guide of the finishing mill. This locking device uses a spring for locking, extending its service life. Since the locking device is mainly used to lock the entrance guide, the required locking force can be achieved by the compression force of the spring. However, the roughing mill itself can weigh over 3 tons, and vertical mills require a locking device for fixation to prevent them from falling. The aforementioned spring structure cannot meet the locking requirements of the roughing mill. Utility Model Content

[0004] The purpose of this invention is to design an automatic locking device for a rolling mill. By setting multiple disc springs with compression on the side opposite to the piston and cylinder rod, the rolling mill can be locked by the elastic force of the disc springs, which has a greater locking force, ensuring the safety of the rolling process. Furthermore, it eliminates the need for continuous pressurization of the oil chamber, reducing power and oil consumption, improving the service life of the hydraulic equipment, and lowering maintenance costs.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: an automatic locking device for a rolling mill, comprising a cylinder body, a cylinder rod, a piston, a disc spring, and a disc spring cover;

[0006] The cylinder body has a horizontally arranged through-hole cavity;

[0007] The cylinder rod and piston are connected to each other and are horizontally slidable in the inner cavity. The cylinder rod and piston are respectively sealed to the side wall of the inner cavity. An oil cavity is provided between the cylinder rod, piston and inner cavity. The cylinder body is provided with an oil port communicating with the oil cavity.

[0008] The disc spring cover is detachably mounted on the right end of the cylinder body. The disc spring cover contains multiple disc springs that are compressed and installed together. The disc spring cover has a sliding cavity that matches the disc springs. The disc springs are in contact with the piston and the disc spring cover respectively.

[0009] The left end of the cylinder rod is provided with an anti-rotation and extrusion surface.

[0010] In a preferred embodiment, this invention further includes a guide sleeve, a first sealing ring, and a second sealing ring. The guide sleeve is disposed between the inner cavity and the cylinder rod. The first sealing ring is disposed between the guide sleeve and the side wall of the inner cavity, and the second sealing ring is disposed between the guide sleeve and the cylinder rod. By providing a guide sleeve between the inner cavity and the cylinder rod, the protection of the cylinder inner cavity is increased, making it more wear-resistant. The first sealing ring achieves a seal between the guide sleeve and the side wall of the inner cavity, and the second sealing ring achieves a seal between the guide sleeve and the cylinder rod.

[0011] In a preferred embodiment of this invention, a limiting protrusion is provided on the left side of the inner cavity, and the guide sleeve is provided with a mounting groove that matches the limiting protrusion. The limiting protrusion cooperates with the mounting groove of the guide sleeve to limit and fix the guide sleeve.

[0012] Preferably, this invention also includes a dust cover, which is detachably mounted on the left end of the guide sleeve and located between the guide sleeve and the cylinder rod. The dust cover seals the gap between the guide sleeve and the cylinder rod, preventing dust from entering and causing wear on the cylinder rod.

[0013] Preferably, in this invention, the outer diameter of the disc spring is larger than the inner diameter of the inner cavity, and the inner diameter of the sliding cavity is larger than the inner diameter of the inner cavity. Because the outer diameter of the disc spring is larger than the inner diameter of the inner cavity, the right end face of the cylinder can limit the disc spring, preventing the spring force from being too great and squeezing the piston out from the left side of the inner cavity.

[0014] In a preferred embodiment of this invention, the right end of the disc spring cover is provided with an air hole communicating with the sliding cavity. The function of the air hole is to balance the pressure on both sides of the piston, ensuring a constant air pressure on the side of the inner cavity without the cylinder rod, and avoiding affecting the normal operation of the hydraulic cylinder.

[0015] Preferably, the thickness of the disc spring is 4mm or more. To ensure the spring's elasticity and strength, the thickness of the disc spring is set to 4mm or more.

[0016] Preferably, in this invention, the cylinder rod is detachably mounted on the piston. This detachable mounting allows for easy replacement of the cylinder rod or piston if it is damaged, facilitating maintenance.

[0017] Preferably, the piston has a guide rod at its right end that matches the inner hole of the disc spring. By providing a guide rod at the right end of the piston that matches the inner hole of the disc spring, the guide rod guides the disc spring during compression and deployment, reducing the resistance during the compression or deployment process.

[0018] In a preferred embodiment of this invention, the cylinder body is provided with two or more oil ports, which facilitates faster pressurization and depressurization, and improves the installation and disassembly efficiency of the automatic locking device of the rolling mill.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: In the automatic locking device of the rolling mill of this utility model, the cylinder rod and piston are horizontally slidably arranged in the inner cavity of the cylinder body, and multiple mutually compressed disc springs are arranged in the sliding cavity of the disc spring cover. Since the disc springs are in contact with the piston and the disc spring cover respectively, the disc springs can provide a greater preload to the rolling mill through the piston and cylinder rod, ensuring the stability of the rolling mill, and can achieve self-locking of the rolling mill without pressurizing the oil chamber. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic locking device for a rolling mill.

[0021] Figure 2 This is a schematic diagram of the disc spring structure;

[0022] In the diagram, cylinder 1 is the cylinder block, cylinder 2 is the cylinder rod, and cylinder 21 is the anti-rotation extrusion surface.

[0023] 3 pistons, 31 guide rods, 4 disc springs, 5 disc spring caps;

[0024] 100 inner cavity, 101 limiting protrusion, 200 oil cavity, 11 oil port;

[0025] 51 Sliding cavity, 52 Air pore;

[0026] 6 Guide sleeve, 61 Mounting groove, 7 First sealing ring, 8 Second sealing ring, 9 Dustproof sleeve, 10 Third sealing ring. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, an automatic locking device for a rolling mill includes a cylinder body 1, a cylinder rod 2, a piston 3, a disc spring 4, and a disc spring cover 5. To prevent corrosion of the cylinder rod 2 caused by the harsh on-site environment, a stainless steel protective layer is plated on the surface of the cylinder rod 2.

[0029] The cylinder body 1 has a horizontally arranged through-hole cavity 100.

[0030] The cylinder rod 2 and piston 3 are interconnected and horizontally slidable within the inner cavity 100. The cylinder rod 2 and piston 3 are respectively sealed to the side wall of the inner cavity 100. An oil chamber 200 is provided between the cylinder rod 2, piston 3, and inner cavity 100. The cylinder body 1 is provided with an oil port 11 communicating with the oil chamber 200. In this embodiment, the cylinder body 1 is provided with two or more oil ports 11. Specifically, a third sealing ring 10 is provided between the piston 3 and the inner wall of the inner cavity 100.

[0031] The disc spring cover 5 is detachably mounted on the right end of the cylinder body 1. Specifically, the disc spring cover 5 is bolted to the cylinder body 1. Multiple disc springs 4 are installed inside the disc spring cover 5 and are compressed together. The disc spring cover 5 has a sliding cavity 51 that matches the disc springs 4. The sliding cavity 51 is coaxially arranged with the inner cavity 100. The disc springs 4 are in contact with the piston 3 and the disc spring cover 5 respectively.

[0032] The left end of the cylinder rod 2 is provided with an anti-rotation extrusion surface 21. The anti-rotation extrusion surface 21 is an inclined surface that contacts the base of the roughing mill. The base of the roughing mill is provided with an inclined surface that matches the anti-rotation extrusion surface 21 to ensure the stability of the cylinder rod 2 during the locking process.

[0033] The automatic locking device for the rolling mill further includes a guide sleeve 6, a first sealing ring 7, and a second sealing ring 8. The guide sleeve 6 is disposed between the inner cavity 100 and the cylinder rod 2. The first sealing ring 7 is disposed between the guide sleeve 6 and the side wall of the inner cavity 100, and the second sealing ring 8 is disposed between the guide sleeve 6 and the cylinder rod 2. Both the first sealing ring 7 and the second sealing ring 8 are rubber sealing rings.

[0034] An annular limiting protrusion 101 is provided on the left side of the inner cavity 100, and the guide sleeve 6 is provided with an installation groove 61 that matches the limiting protrusion 101.

[0035] The automatic locking device for the rolling mill also includes a dust cover 9, which is detachably mounted on the left end of the guide sleeve 6 and is located between the guide sleeve 6 and the cylinder rod 2.

[0036] The outer diameter of the disc spring 4 is greater than the inner diameter of the inner cavity 100, and the inner diameter of the sliding cavity 51 is greater than the inner diameter of the inner cavity 100.

[0037] The disc spring cover 5 has an air hole 52 at its right end that communicates with the sliding cavity 51.

[0038] The thickness H of the disc spring 4 is 4mm or more.

[0039] The cylinder rod 2 is detachably mounted on the piston 3. Specifically, the cylinder rod 2 is made of steel and has a connector at its right end. The piston 3 is made of rubber and has a groove at its left end. The connector of the cylinder rod 2 is inserted into the groove of the piston 3 to achieve quick installation.

[0040] The piston 3 is provided with a guide rod 31 at its right end that matches the inner hole of the disc spring 4. The guide rod 31 is inserted into the inner hole of the disc spring 4.

[0041] The locking device in this embodiment is used to lock the roughing mill. The mill itself can weigh more than 3 tons. The vertical mill needs to be fixed by this locking device to prevent it from falling. In this embodiment, the locking force of a single locking device reaches 22,700 N, which effectively ensures the safe operation of the mill.

[0042] The working principle of this utility model is as follows: In this embodiment, the automatic locking device for the rolling mill is fixed to the base of the locking device using four M36*220mm hexagonal bolts through bolt holes on the cylinder body 1. During production, when the hydraulic station pump stops, the cylinder rod 2 of the locking device extends under the pressure of the disc spring 4, locking the rolling mill. When the rolling mill needs to be replaced, the hydraulic pump is started to inject hydraulic oil into the rod chamber (oil chamber 200) of the hydraulic cylinder through the oil port 11, causing the disc spring 4 to press down and the cylinder rod 2 to retract, thus releasing the rolling mill from locking. The cylinder body 1 of the locking device is equipped with a disc spring 4 at the rodless end of the piston 3, which allows the cylinder rod 2 to extend without hydraulic pressure, achieving automatic locking. This greatly reduces power consumption and oil consumption, increases the service life of the locking device, reduces equipment maintenance costs, and eliminates equipment safety hazards.

Claims

1. An automatic locking device for a rolling mill, characterized in that: It includes a cylinder block (1), a cylinder rod (2), a piston (3), a disc spring (4), and a disc spring cover (5); The cylinder body (1) is horizontally provided with a through-hole cavity (100); The cylinder rod (2) and piston (3) are connected to each other. The cylinder rod (2) and piston (3) are horizontally slidably disposed in the inner cavity (100). The cylinder rod (2) and piston (3) are respectively sealed to the side wall of the inner cavity (100). An oil cavity (200) is provided between the cylinder rod (2), piston (3) and inner cavity (100). The cylinder body (1) is provided with an oil port (11) communicating with the oil cavity (200). The disc spring cover (5) is detachably provided on the right end of the cylinder body (1). The disc spring cover (5) is provided with multiple disc springs (4) that are compressed and installed together. The disc spring cover (5) is provided with a sliding cavity (51) that matches the disc springs (4). The disc springs (4) are in contact with the piston (3) and the disc spring cover (5) respectively. The left end of the cylinder rod (2) is provided with an anti-rotation extrusion surface (21).

2. The automatic locking device for rolling mills according to claim 1, characterized in that: It also includes a guide sleeve (6), a first sealing ring (7) and a second sealing ring (8). The guide sleeve (6) is disposed between the inner cavity (100) and the cylinder rod (2). The first sealing ring (7) is disposed between the guide sleeve (6) and the side wall of the inner cavity (100), and the second sealing ring (8) is disposed between the guide sleeve (6) and the cylinder rod (2).

3. The automatic locking device for rolling mills according to claim 2, characterized in that: The inner cavity (100) is provided with a limiting protrusion (101) on the left side, and the guide sleeve (6) is provided with an installation groove (61) that matches the limiting protrusion (101).

4. The automatic locking device for rolling mills according to claim 2, characterized in that: It also includes a dust cover (9), which is detachably disposed on the left end of the guide sleeve (6) and is located between the guide sleeve (6) and the cylinder rod (2).

5. The automatic locking device for rolling mills according to claim 1, characterized in that: The outer diameter of the disc spring (4) is greater than the inner diameter of the inner cavity (100), and the inner diameter of the sliding cavity (51) is greater than the inner diameter of the inner cavity (100).

6. The automatic locking device for rolling mills according to claim 1, characterized in that: The disc spring cover (5) has an air hole (52) at the right end that communicates with the sliding cavity (51).

7. The automatic locking device for rolling mills according to claim 1, characterized in that: The thickness of the disc spring (4) is more than 4 mm.

8. The automatic locking device for rolling mills according to claim 1, characterized in that: The cylinder rod (2) is detachably mounted on the piston (3).

9. The automatic locking device for rolling mills according to claim 1, characterized in that: The piston (3) is provided with a guide rod (31) at the right end that matches the inner hole of the disc spring (4).

10. The automatic locking device for rolling mills according to claim 1, characterized in that: The cylinder (1) is provided with two or more oil ports (11).

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