Soft landing safety device for grinding machine

Abstract

The utility model relates to a grinding machine soft landing safety device which comprises a roller and further comprises a base body, guide columns, a hydraulic system, a hydraulic cylinder and a saddle, the hydraulic cylinder and the guide columns are fixedly connected with a base, the guide columns are symmetrically arranged on the two sides of the base respectively and connected with the saddle through the base body, and the saddle is used for bearing the roller. The guide columns are driven by corresponding hydraulic cylinders to lift, and the hydraulic system is used for driving the hydraulic cylinders to stretch. The utility model has the advantages that the three-position four-way reversing valve is arranged between the oil tank and the rod cavity of the hydraulic cylinder and is used for realizing the lifting / falling action of the oil cylinder, the structure is simple, the operation is simple, and the maintenance is convenient; a first ball valve is arranged between the first hydraulic control one-way valve and a rod cavity of the hydraulic cylinder, a second ball valve is arranged between the second hydraulic control one-way valve and a rodless cavity of the hydraulic cylinder, oil supply of the oil tank is cut off by closing the first ball valve and the second ball valve after operation of the soft landing device is completed, and the situation that a grinding machine and a roller are damaged due to damage of a soft landing system is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of roll grinders, in particular to a soft landing safety device for a grinder. Background Technique

[0002] Currently, in the roll grinding rooms for hot rolling, cold rolling and non-ferrous sheet processing, roll grinders are usually used for machining rolls. When the roll is machined on the grinder, a soft landing device is required to slowly place the roll on the bearing pad device. If there is a fault in the hydraulic system of the soft landing device, such as damage or leakage of the electromagnetic directional control valve, hydraulic control check valve, or hydraulic cylinder, it will cause the soft landing device to rise out of control, resulting in damage to the grinder and the roll. Summary of the Invention

[0003] The purpose of the utility model is to provide a soft landing safety device for a grinder, which improves the safety and stability of the soft landing device.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] A soft landing safety device for a grinder includes a roll, and also includes a base body, guide columns, a hydraulic system, a hydraulic cylinder, and a saddle. The hydraulic cylinder and the guide columns are both fixedly connected to the base. The guide columns are symmetrically arranged on both sides of the base respectively. The guide columns are connected to the saddle through the base body. The saddle is used to support the roll. The guide columns are driven to lift and lower by the corresponding hydraulic cylinders, and the hydraulic system is used to drive the hydraulic cylinder to extend and retract.

[0006] The hydraulic system includes a speed control valve I, a speed control valve II, a stop valve I, a stop valve II, a hydraulic control check valve I, a hydraulic control check valve II, and an electromagnetic directional control valve. The oil inlet of the hydraulic control check valve I is communicated with the A port of the electromagnetic directional control valve. The oil outlet of the hydraulic control check valve I is communicated with the stop valve I. The other end of the stop valve I is respectively communicated with the rod chamber of the hydraulic cylinder. The oil inlet of the hydraulic control check valve II is communicated with the B port of the electromagnetic directional control valve. The oil outlet of the hydraulic control check valve II is communicated with the stop valve II. The other end of the stop valve II is respectively communicated with the rodless chamber of the hydraulic cylinder through the speed control valve I and the speed control valve II.

[0007] The P port and the T port of the electromagnetic directional control valve are communicated with the oil tank.

[0008] The electromagnetic directional control valve is a three-position four-way directional control valve.

[0009] Both the stop valve I and the stop valve II adopt ball valves, and the ball valves are both manual ball valves.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. A three-position four-way directional control valve is adopted between the oil tank and the rod chamber of the hydraulic cylinder to realize the lifting / falling action of the oil cylinder. The structure is simple, the operation is simple, and the maintenance is convenient;

[0012] 2. A ball valve I is adopted between the one-way hydraulic control valve I and the rod chamber of the hydraulic cylinder, and a ball valve II is adopted between the one-way hydraulic control valve II and the rodless chamber of the hydraulic cylinder. After the soft landing device operation is completed, the ball valve I and the ball valve II are manually closed to cut off the oil supply from the fuel tank to the hydraulic cylinder, preventing the grinder and the roll from being damaged if the soft landing hydraulic system fails;

[0013] 3. A speed control valve I and a speed control valve II are adopted between the ball valve II and the rodless chamber of the hydraulic cylinder, facilitating the maintenance personnel to adjust the lifting speed of the hydraulic cylinder;

[0014] 4. The valve block is adopted to achieve integration, which can reduce the space occupation, reduce the hydraulic oil leakage and facilitate the maintenance. Description of the Drawings

[0015] Figure 1 is the front view of the soft landing safety device of the grinder.

[0016] Figure 2 is the side view of the soft landing safety device of the grinder.

[0017] Figure 3 is the schematic diagram of the hydraulic system principle of the soft landing safety device of the grinder.

[0018] In the figure: 1-three-position four-way directional control valve; 2-one-way hydraulic control valve I; 3-ball valve I; 4-ball valve II; 5-speed control valve I; 6-speed control valve II; 7-hydraulic cylinder I; 8-hydraulic cylinder II; 9-valve block; 10-one-way hydraulic control valve II; 12-seat body; 13-bolt; 14-saddle; 15-roll; 16-guide post; 17-base; 18-supporting pad. Detailed Embodiment

[0019] The present invention will be described in detail below in conjunction with the drawings of the specification, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0020] The following embodiments are implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. The methods used in the following embodiments are all conventional methods unless otherwise specified.

[0021]

Embodiment 1

[0022] See Figures 1 to 3, A soft landing safety device for a grinding machine, including a roll 15, and also including a seat body 12, a guide post 16, a hydraulic system, a hydraulic cylinder, and a saddle 14. The hydraulic system includes a speed control valve 1-5, a speed control valve 2-6, a ball valve 1-3, a ball valve 2-4, a pilot-operated check valve 1-2, a pilot-operated check valve 2-10, and a three-position four-way directional control valve 1. The pilot-operated check valve 1-2, the pilot-operated check valve 2-10, and the three-position four-way directional control valve 1 are arranged on a valve block 9 and are connected through the oil passages in the valve block 9. The hydraulic cylinder and the guide post 16 are both fixedly connected to a base 17. The guide posts 16 are symmetrically arranged on both sides of the base 17 respectively. The guide posts 16 are connected to the saddle 14 through the seat body 12. The saddle 14 is used to support the roll 15. The guide posts 16 are driven to move up and down by the corresponding hydraulic cylinders. The hydraulic system is used to drive the hydraulic cylinder to extend and retract; the inlet port of the pilot-operated check valve 1-2 is communicated with the A port of the three-position four-way directional control valve 1, the outlet port of the pilot-operated check valve 1-2 is communicated with the ball valve 1-3, and the other end of the ball valve 1-3 is respectively communicated with the rod chamber of the hydraulic cylinder; the inlet port of the pilot-operated check valve 2-10 is communicated with the B port of the three-position four-way directional control valve 1, the outlet port of the pilot-operated check valve 2-10 is communicated with the ball valve 2-4, and the other end of the ball valve 2-4 is respectively communicated with the rodless chamber of the hydraulic cylinder through the speed control valve 1-5 and the speed control valve 2-6; the P port and the T port of the three-position four-way directional control valve 1 are communicated with the oil tank.

[0023] Working process:

[0024] 1) The coil A of the three-position four-way directional control valve 1 is energized, and the coil B is de-energized.

[0025] The three-position four-way directional control valve 1 acts, and the hydraulic oil flows through the pilot-operated check valve 2-10, the ball valve 2-4, the speed control valve 1-5, and the speed control valve 2-6, and enters the hydraulic cylinder 1-7 and the hydraulic cylinder 2-8. The hydraulic cylinder 1-7 and the hydraulic cylinder 2-8 are simultaneously lifted upward to the in-place position, and the roll 15 is placed on the saddle 14.

[0026] 2) The coil B of the three-position four-way directional control valve 1 is energized, and the coil A is de-energized.

[0027] The hydraulic cylinder 1-7 and the hydraulic cylinder 2-8 slowly descend downward following the guide posts 16. After descending to the middle position, the roll 15 is supported by the bearing pad 18. The hydraulic cylinder 1-7 and the hydraulic cylinder 2-8 continue to descend to the bottommost position. The hydraulic oil flows through the ball valve 1-3, the pilot-operated check valve 1-2, and the three-position four-way directional control valve 1 and flows back to the oil tank. Then, the ball valve 1-3 and the ball valve 2-4 are closed.

[0028] 3) The coil A of the three-position four-way directional control valve 1 is de-energized, and the coil B is de-energized.

[0029] The roll 15 is ground and repaired.

[0030] A three-position four-way directional control valve is adopted between the fuel tank of the utility model and the rod chamber of the hydraulic cylinder to realize the lifting / falling action of the oil cylinder. The structure is simple, the operation is simple, and the maintenance is convenient. A ball valve one is adopted between the first hydraulic check valve and the rod chamber of the hydraulic cylinder, and a ball valve two is adopted between the second hydraulic check valve and the rodless chamber of the hydraulic cylinder. After the operation of the soft landing device is completed, the ball valve one and the ball valve two are manually closed to cut off the oil supply from the fuel tank to the hydraulic cylinder, preventing the grinder and the roll from being damaged if the soft landing hydraulic system fails. A speed control valve one and a speed control valve two are adopted between the ball valve two and the rodless chamber of the hydraulic cylinder, which is convenient for maintenance personnel to adjust the lifting speed of the hydraulic cylinder. The use of a valve block to achieve integration can reduce the space occupation, reduce the leakage of hydraulic oil, and facilitate maintenance.

Claims

1. A soft landing safety device for a grinding machine, including a roll, characterized in that, It also includes a seat body, guide columns, a hydraulic system, a hydraulic cylinder, and a saddle. The hydraulic cylinder and the guide columns are both fixedly connected to the base. The guide columns are symmetrically arranged on both sides of the base respectively. The guide columns are connected to the saddle through the seat body. The saddle is used to support the roll. The guide columns are driven to lift by the corresponding hydraulic cylinders. The hydraulic system is used to drive the telescopic movement of the hydraulic cylinders.

2. The soft landing safety device for a grinding machine according to claim 1, characterized in that, The described hydraulic system includes a speed control valve 1, a speed control valve 2, a stop valve 1, a stop valve 2, a pilot-operated check valve 1, a pilot-operated check valve 2, and an electromagnetic directional control valve. The oil inlet of the pilot-operated check valve 1 is connected to port A of the electromagnetic directional control valve. The oil outlet of the pilot-operated check valve 1 is connected to the stop valve 1. The other end of the stop valve 1 is respectively connected to the rod chamber of the hydraulic cylinder. The oil inlet of the pilot-operated check valve 2 is connected to port B of the electromagnetic directional control valve. The oil outlet of the pilot-operated check valve 2 is connected to the stop valve 2. The other end of the stop valve 2 is respectively connected to the rodless chamber of the hydraulic cylinder through the speed control valve 1 and the speed control valve 2.

3. The soft landing safety device for a grinding machine according to claim 2, characterized in that, The P port and the T port of the described electromagnetic directional control valve are connected to the oil tank.

4. The soft landing safety device for a grinding machine according to claim 2, characterized in that, The described electromagnetic directional control valve is a three-position four-way directional control valve.

5. The soft landing safety device of a grinding machine according to claim 2, characterized in that, Both the stop valve 1 and the stop valve 2 adopt ball valves, and the ball valves are all manual ball valves.

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