Hydraulic mechanical buffer device for rolling mill

Abstract

The utility model discloses a hydraulic mechanical buffer device for a steel mill, which comprises a cylinder body, a piston arranged in the cylinder body, a buffer solution filled in the second cavity, a cylinder rod arranged on the piston and capable of passing through a through hole of the buffer solution, and a piston rod arranged on the cylinder rod, the other end of the cylinder body is provided with a connecting part and an elastic assembly, the elastic assembly is arranged on the cylinder body and used for enabling the cylinder rod to be away from the cylinder body, the buffering device conducts composite buffering force unloading in multiple modes, when impact occurs, the cylinder rod shrinks into the cylinder body, the piston extrudes the buffering solution to relieve pressure, and the buffering solution can flow to pass through the through hole to further relieve pressure; the buffer solution is prevented from over-compression cylinder explosion, the buffer solution is reset through the elastic assembly after buffer pressure relief, the buffer solution flows back to the second cavity from the first cavity through the through hole, and the elastic assembly can assist buffer pressure relief. The buffer solution in a daily unstressed state can also absorb vibration of the device to reduce abrasion and noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic buffer devices, and more specifically, relates to a hydraulic mechanical buffer device for a rolling mill. Background Art

[0002] In the daily production of a rolling mill, a hydraulic mechanical buffer device plays a crucial role. Briefly speaking, a hydraulic mechanical buffer device is a device that utilizes the incompressibility and fluidity of hydraulic oil to buffer, decelerate, and position moving parts by controlling the flow of hydraulic oil in the system. In a buffer baffle device, a hydraulic mechanical buffer device can effectively avoid direct collisions between moving parts, thereby protecting the equipment from damage and extending the service life of the equipment.

[0003] Most of the existing hydraulic buffer devices simply rely on the flow and resistance of hydraulic oil for buffering, lacking fine control and adjustment of the buffering process. The simple buffering method is difficult to meet the actual needs, and it is easy to cause equipment damage, production interruption, and even safety accidents. Summary of the Utility Model

[0004] The purpose of the utility model is to address the deficiencies in the existing technology and provide a hydraulic mechanical buffer device for a rolling mill, which solves the problem that the existing simple buffering method relying solely on the flow and resistance of hydraulic oil is difficult to meet the actual needs.

[0005] To achieve the above object, the utility model provides a hydraulic mechanical buffer device for a rolling mill, comprising:

[0006] A cylinder body, in which a piston is arranged, and the piston divides the cylinder body into a first chamber and a second chamber;

[0007] Buffer liquid, which is filled in the second chamber, and a through hole capable of passing through the buffer liquid is arranged on the piston;

[0008] A cylinder rod, one end of which is inserted into the first chamber and connected to the piston, and the other end of the cylinder body is provided with a connecting portion;

[0009] An elastic force component, which is arranged on the cylinder body and is used to move the cylinder rod away from the cylinder body.

[0010] Optionally, the elastic force component includes:

[0011] A first spring, which is sleeved on the cylinder rod, and both ends of the first spring are respectively connected to the connecting portion and the cylinder body.

[0012] Optionally, the elastic force component includes:

[0013] A second spring, the second spring is disposed in the second cavity, and two ends of the second spring are respectively connected to the piston and the inner wall of the cylinder block.

[0014] Optionally, the insertion end of the cylinder rod is slidably connected to the side wall of the first cavity through a friction block.

[0015] Optionally, the friction block includes:

[0016] A connecting rod, one end of the connecting rod is rotatably connected to the insertion end of the cylinder rod, and the other end of the connecting rod is provided with a wear-resistant portion;

[0017] A tension module, the tension module is disposed between the connecting rod and the cylinder rod, and is configured to provide a force for moving the connecting rod away from the cylinder rod and bringing the wear-resistant portion close to the inner wall of the cylinder block.

[0018] Optionally, the wear-resistant portion includes:

[0019] A connecting plate, one side of the connecting plate is rotatably connected to the other end of the connecting rod, and a consumable block conforming to the inner wall of the cylinder block is detachably connected to the other side of the connecting plate.

[0020] Optionally, the buffer liquid is a non-Newtonian fluid liquid.

[0021] Optionally, a guiding mechanism for the piston is further disposed in the second cavity.

[0022] Optionally, the guiding mechanism is a telescopic rod, and the telescopic rod is coaxially disposed with the cylinder rod.

[0023] Optionally, a plurality of the second springs are circumferentially distributed around the axis of the cylinder rod.

[0024] The present utility model provides a hydraulic mechanical buffer device for a rolling mill, and the beneficial effects thereof are as follows:

[0025] The buffer device buffers and unloads force in a compound manner in multiple ways. When an impact occurs, the cylinder rod contracts into the cylinder body, the piston squeezes the buffer liquid to release pressure, and the buffer liquid can flow through the through hole to further release pressure, avoiding explosion of the cylinder due to over-compression of the buffer liquid. After the buffer pressure is released, it is reset by the elastic force assembly. The buffer liquid flows back from the first cavity to the second cavity through the through hole, and the elastic force assembly can also assist in buffering and unloading force. The buffer liquid in the daily non-loaded state can also absorb the vibration of the device, reduce wear and noise.

[0026] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0027] The above and other objects, features, and advantages of the present utility model will become more apparent by describing the exemplary embodiments of the present utility model in more detail with reference to the accompanying drawings, wherein, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0028] Figure 1 The structural schematic diagram of a hydraulic mechanical buffer device for a rolling mill according to an embodiment of the present utility model is shown.

[0029] Figure 2 The enlarged view at position A of the hydraulic mechanical buffer device for a rolling mill according to an embodiment of the present utility model is shown.

[0030] Explanation of reference numerals in the drawings:

[0031] 1. Cylinder block; 2. Piston; 3. Cylinder rod; 4. Connecting part; 5. First spring; 6. Second spring; 7. Connecting rod; 8. Tension module; 9. Wear-resistant part; 10. Telescopic rod. Detailed implementation manners

[0032] The preferred embodiments of the present utility model will be described in more detail below. Although the preferred embodiments of the present utility model are described below, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0033] As Figure 1-2 shown, a hydraulic mechanical buffer device for a rolling mill includes:

[0034] A cylinder block 1, a piston 2 is arranged in the cylinder block 1, and the piston 2 divides the cylinder block 1 into a first chamber and a second chamber;

[0035] Buffer liquid, the buffer liquid is filled in the second chamber, and a through hole capable of passing through the buffer liquid is arranged on the piston 2;

[0036] A cylinder rod 3, one end of the cylinder rod 3 is inserted into the first chamber and connected to the piston 2, and a connecting part 4 is arranged at the other end of the cylinder block 1;

[0037] An elastic force assembly, the elastic force assembly is arranged on the cylinder block 1 and is used to move the cylinder rod 3 away from the cylinder block 1.

[0038] Specifically, the buffer device combines multiple methods for buffering and unloading force. When an impact occurs, the cylinder rod 3 retracts into the cylinder body 1, the piston 2 squeezes the buffer liquid to release pressure, and the buffer liquid can flow through the through-hole to further release pressure, avoiding over-compression and explosion of the buffer liquid. After the buffer pressure is released, it is reset by the elastic component. The buffer liquid flows back from the first chamber to the second chamber through the through-hole, and the elastic component can also assist in buffering and unloading force. The buffer liquid in the state of not being stressed in daily life can also absorb the vibration of the device, reduce wear and noise.

[0039] Furthermore, the entire cylinder body 1 can be used as a piston or a strut of a large piston mechanism.

[0040] Even further, a third chamber is added on the basis of the second chamber or separated by a partition. The first chamber and the second chamber are connected, and the second chamber and the third chamber are not connected. The partition can move to adjust the volume of the third chamber. At this time, the third chamber can be filled with hydraulic oil, thereby adjusting the telescopic amount of the cylinder rod 3 relative to the cylinder body 1 and realizing an integrated design with the hydraulic cylinder.

[0041] In this embodiment, the elastic component includes:

[0042] The first spring 5, the first spring 5 is sleeved on the cylinder rod 3, and both ends of the first spring 5 are respectively connected to the connecting part 4 and the cylinder body 1.

[0043] Specifically, the cylinder rod 3 is driven to reset by the first spring 5, and at the same time, the first spring 5 can also assist in buffering and unloading force.

[0044] In this embodiment, the elastic component includes:

[0045] The second spring 6, the second spring 6 is arranged in the second chamber, and both ends of the second spring 6 are respectively connected to the piston 2 and the inner wall of the cylinder body 1.

[0046] Specifically, the piston 2 is directly stressed by the second spring 6 to ensure the stability of the piston 2 during movement. At the same time, the second spring 6 is used to offset the vacuum suction caused by the lack of buffer liquid in the second chamber, avoiding the distortion and deformation of the piston 2.

[0047] Furthermore, if the third chamber is provided, both ends of the second spring 6 are connected to the piston 2 and the partition.

[0048] In this embodiment, the insertion end of the cylinder rod 3 is slidably connected to the side wall of the first chamber through a friction block.

[0049] Specifically, the kinetic energy is converted into heat energy and consumed through the friction block, and at the same time, the movement speed of the cylinder rod 3 is avoided from being too fast.

[0050] In this embodiment, the friction block includes:

[0051] The connecting rod 7, one end of the connecting rod 7 is rotatably connected to the insertion end of the cylinder rod 3, and the other end of the connecting rod 7 is provided with a wear-resistant part 9;

[0052] The tension module 8 is arranged between the connecting rod 7 and the cylinder rod 3 and is used to provide a force that moves the connecting rod 7 away from the cylinder rod 3 and brings the wear-resistant part 9 closer to the inner wall of the cylinder block 1.

[0053] Specifically, the wear-resistant part 9 is pressed against the inner wall of the cylinder block 1 by the cooperation of the connecting rod 7 and the tension module 8.

[0054] Furthermore, the tension module 8 is a tension spring or a spring piece, and the connecting rod 7 and the lever form an arrow-shaped structure with the tip facing the connecting part 4.

[0055] In this embodiment, the wear-resistant part 9 includes:

[0056] A connecting plate, one side of the connecting plate is rotatably connected to the other end of the connecting rod 7, and a consumable block conforming to the inner wall of the cylinder block 1 is detachably connected to the other side of the connecting plate.

[0057] Specifically, the posture is adjusted by the rotational connection between the connecting plate and the connecting rod 7 to adapt to consumable blocks of different thicknesses, so that the consumable block is closely attached to the inner wall of the cylinder block 1.

[0058] In this embodiment, the buffer liquid is a non-Newtonian fluid type liquid.

[0059] Specifically, the non-Newtonian fluid can more effectively absorb and disperse the impact energy.

[0060] In this embodiment, a guiding mechanism for the piston 2 is further arranged in the second cavity.

[0061] Specifically, the guiding mechanism ensures the stable movement trajectory of the piston 2 and avoids the twisting displacement of the piston 2.

[0062] Furthermore, the piston 2 can be provided with a conforming support plate to improve the support strength, and at the same time, the support plate is provided with an avoidance hole that cooperates with the through hole.

[0063] In this embodiment, the guiding mechanism is a telescopic rod 10, and the telescopic rod 10 is coaxially arranged with the cylinder rod 3.

[0064] Specifically, the guiding is carried out by the telescopic rod 10, which is simpler and more effective than the sliding groove and slider.

[0065] In this embodiment, a plurality of second springs 6 are circumferentially distributed around the axis of the cylinder rod 3.

[0066] Specifically, the circumferential distribution of a plurality of springs around the telescopic rod 10 ensures uniform force on each part of the piston 2.

[0067] When the hydraulic mechanical buffer device for a rolling mill in this embodiment is in use, taking the buffer and unloading as an example:

[0068] When an impact occurs, the cylinder rod 3 contracts into the cylinder block 1, and the pressure is relieved through a variety of combined methods:

[0069] 1. The piston 2 first squeezes the buffer liquid to relieve pressure. At the same time, the buffer liquid is compressed and flows through the through hole to relieve pressure, avoiding over-compression of the buffer liquid and cylinder explosion.

[0070] 2. The cylinder rod 3 compresses the first spring 5, and the piston 2 synchronously compresses the second spring 6 to relieve force.

[0071] 3. The cylinder rod 3 moves axially, converts kinetic energy into heat energy through the friction block and consumes it, and reduces the movement speed of the cylinder rod 3.

[0072] After pressure relief, it is reset by the elastic component. The buffer liquid in the state of not being stressed in daily life can also absorb the vibration of the device, reduce wear and noise.

[0073] The embodiments of the present invention have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hydraulic mechanical buffer device for a rolling mill, characterized in that, Comprising: A cylinder block, within which a piston is arranged, and the piston divides the cylinder block into a first chamber and a second chamber; A buffer liquid, which is filled in the second chamber, and a through hole capable of passing through the buffer liquid is arranged on the piston; A cylinder rod, one end of which is inserted into the first chamber and connected to the piston, and a connecting portion is arranged at the other end of the cylinder block; An elastic force assembly, which is arranged on the cylinder block and is used to move the cylinder rod away from the cylinder block.

2. The hydraulic mechanical buffer device for a rolling mill according to claim 1, characterized in that, The elastic force assembly includes: A first spring, which is sleeved on the cylinder rod, and both ends of the first spring are respectively connected to the connecting portion and the cylinder block.

3. The hydraulic mechanical buffer device for a rolling mill according to claim 1, characterized in that, The elastic force assembly includes: A second spring, which is arranged in the second chamber, and both ends of the second spring are respectively connected to the piston and the inner wall of the cylinder block.

4. The hydraulic mechanical buffer device for a rolling mill according to claim 1, characterized in that, The inserted end of the cylinder rod is slidably connected to the side wall of the first chamber through a friction block.

5. The hydraulic mechanical buffer device for a rolling mill according to claim 4, characterized in that, The friction block includes: A connecting rod, one end of which is rotatably connected to the inserted end of the cylinder rod, and a wear-resistant portion is arranged at the other end of the connecting rod; A tension module, which is arranged between the connecting rod and the cylinder rod and is used to provide a force to move the connecting rod away from the cylinder rod and make the wear-resistant portion close to the inner wall of the cylinder block.

6. The hydraulic mechanical buffer device for a rolling mill according to claim 5, characterized in that, The wear-resistant portion includes: A connecting plate, one side of which is rotatably connected to the other end of the connecting rod, and a consumption block conforming to the inner wall of the cylinder block is detachably connected to the other side of the connecting plate.

7. The hydraulic mechanical buffer device for a rolling mill according to claim 1, characterized in that, The buffer liquid is a non-Newtonian fluid type liquid.

8. The hydraulic mechanical buffer device for a rolling mill according to claim 1, characterized in that, A guiding mechanism for the piston is further arranged in the second chamber.

9. The hydraulic mechanical buffer device for a rolling mill according to claim 8, characterized in that, The guiding mechanism is a telescopic rod, and the telescopic rod is coaxially arranged with the cylinder rod.

10. The hydraulic mechanical buffer device for a rolling mill according to claim 3, characterized in that, A plurality of the second springs are circumferentially distributed around the axis of the cylinder rod.

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