Heavy-load lifting saddle driven by single cylinder

Abstract

The utility model provides a single-cylinder driven heavy load lifting saddle, which comprises a fixed base, a lifting seat, a fixed saddle, a lifting hydraulic cylinder and a guide device, a support seat is arranged at the top of the fixed base, the support seat supports the lifting seat, the fixed saddle is arranged at the top of the lifting seat, and the telescopic end of the lifting hydraulic cylinder corresponds to the center of the bottom of the lifting seat. The single-cylinder independent drive is adopted, the risk of instability caused by low synchronization precision of the hydraulic cylinders is avoided, the upgrading speed is adjustable, and the risk of severe working conditions such as overload and pipe explosion is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of cold-rolled strip steel production, and in particular to a heavy-duty lifting saddle driven by a single cylinder. Background Art

[0002] In the production process of cold-rolled strip steel, before the steel coil enters the entrance section equipment for unwinding, due to the loose coils in the inner ring of the steel coil core, the coil support device is first aligned with the steel coil before welding, and then the coil core is expanded by the expansion and contraction cylinder to make the inner ring curled and close together, and then the welding manipulator is inserted into the coil core for spot welding reinforcement. Since the coil support device is horizontally extended from the outside of the steel coil into the inside of the steel coil, its center height is a fixed value, and at this time, a saddle that can be adaptively raised and lowered for different specifications of steel coils to meet the working requirements of the coil support device is required.

[0003] The traditional lifting saddle device is driven by two cylinders, and hydraulic cylinders are used on the transmission side and the operating side for synchronous lifting. Each cylinder has an independent piston rod guide. In actual use, the hydraulic cylinder head position and speed synchronization accuracy are prone to low, resulting in the offset of the center of gravity of the steel coil. There is a high safety risk of instability in rewinding, which needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a heavy-duty lifting saddle driven by a single cylinder in view of the above-mentioned problems, so as to solve the problems that the existing lifting saddle device has low synchronization accuracy and is easy to become unstable.

[0005] The embodiment of the present application is implemented as follows:

[0006] An embodiment of the present application provides a single-cylinder driven heavy-load lifting saddle, which is characterized in that it includes a fixed base, a lifting seat, a fixed saddle, a lifting hydraulic cylinder and a guide device. A support seat is provided on the top of the fixed base, the support seat supports the lifting seat, the fixed saddle is installed on the top of the lifting seat, the telescopic end of the lifting hydraulic cylinder corresponds to the bottom center of the lifting seat, and the guide device is correspondingly arranged on the lifting seat and the fixed base.

[0007] In some optional embodiments, the lifting hydraulic cylinder is connected to the hydraulic station through a control valve group, and the control valve group includes a proportional directional valve, an electromagnetic reversing valve, a balancing valve and a relief valve. The P port of the proportional directional valve is connected to the oil supply main of the hydraulic station, the T port of the proportional directional valve is connected to the oil return main of the hydraulic station, the A port of the proportional directional valve is connected to the T port of the electromagnetic reversing valve, the B port of the proportional directional valve is connected to the P port of the electromagnetic reversing valve, the A port of the electromagnetic reversing valve is connected to the A port of the balancing valve, the B port of the electromagnetic reversing valve is connected to the rod cavity of the lifting hydraulic cylinder, the B port of the balancing valve is connected to the rodless cavity of the lifting hydraulic cylinder, the X port of the balancing valve is connected to the rod cavity of the lifting hydraulic cylinder, the pressure port M of the relief valve is connected to the rodless cavity of the lifting hydraulic cylinder, and the oil drain port T is connected to the oil drain main of the hydraulic station.

[0008] In some optional embodiments, the guide device includes a guide rod and a guide sleeve, the top of the guide rod is fixedly connected to the lifting seat, a guide hole is provided on the fixed base at a position corresponding to the guide rod, and the guide rod is embedded in the guide hole through the guide sleeve.

[0009] In some optional implementation schemes, two travel switches are provided on the lifting seat, corresponding to the standby position and the upper limit position of the fixed saddle respectively.

[0010] In some optional embodiments, a displacement sensor is provided on the lifting hydraulic cylinder.

[0011] In some optional embodiments, a pad is provided on the working surface of the fixed saddle.

[0012] In some optional embodiments, the bottom of the fixed base is provided with supporting feet.

[0013] The beneficial effects of the present application are as follows: a single-cylinder driven heavy-duty lifting saddle provided by the present application is improved from a dual-cylinder synchronous drive to a single-cylinder independent drive, thereby avoiding the risk of instability caused by the low synchronization accuracy of the hydraulic cylinder; a saddle pad is added to facilitate the connection of the welding machine return cable; the displacement sensor in the hydraulic cylinder and the proximity switch outside the saddle can realize dual control and protection of the saddle position; the functional combination of the control valve group configured on the hydraulic cylinder can reliably realize the adjustable upgrade speed and avoid the risks of adverse working conditions such as overload and pipe burst. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of a control valve group of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0021] like Figure 1 As shown, the utility model provides a single-cylinder driven heavy-duty lifting saddle, comprising a fixed base 1, a lifting seat 2, a fixed saddle 3, a lifting hydraulic cylinder 4 and a guide device 5. A support seat 6 is provided on the top of the fixed base, the support seat supports the lifting seat, the fixed saddle is installed on the top of the lifting seat, the telescopic end of the lifting hydraulic cylinder corresponds to the bottom center of the lifting seat, and the guide device is correspondingly arranged on the lifting seat and the fixed base.

[0022] The guide device comprises a guide rod and a guide sleeve. The top of the guide rod is fixedly connected to the lifting seat. A guide hole is arranged on the fixed base at a position corresponding to the guide rod. The guide rod is embedded in the guide hole through the guide sleeve.

[0023] When the lifting seat is waiting for coiling, the telescopic end of the hydraulic cylinder does not touch the bottom of the lifting seat, and the lifting seat and the fixed saddle are supported by the support seat. After the coiling is completed during the working process, the telescopic end of the hydraulic cylinder begins to rise and touch the bottom of the lifting seat, thereby driving the lifting seat to separate from the support seat, and the lifting seat lifts the fixed saddle and the steel coil to move up and down. At the same time, the lifting seat is fixedly connected to the guide rod, and the guide rod is embedded in the four guide holes of the fixed base through the guide shaft sleeve, so as to achieve stable lifting and lowering of the fixed saddle.

[0024] Two travel switches 7 are arranged on the lifting seat, corresponding to the standby position and the upper limit position of the fixed saddle respectively.

[0025] A displacement sensor 8 is provided on the lifting hydraulic cylinder, which can output the height position of the fixed saddle and the lifting speed of the fixed saddle in real time.

[0026] The working surface of the fixed saddle is provided with a pad 9, which is detachable and replaceable. During the production process, the center height position of the coil support device is fixed. Through the lifting and lowering movement of the hydraulic cylinder, the steel coils of different specifications can be lifted to a height aligned with the center line of the coil support device, and then the welding head of the welding robot will extend into the steel coil for spot welding. During the welding process, the bottom of the steel coil will effectively contact the pad of the fixed saddle. The pad can be replaced after being worn to avoid the loss of the fixed saddle; at the same time, a cable connected to the welding machine body can be set on the pad to form a complete welding circuit to ensure the reliability and safety of the welding machine.

[0027] A support foot 10 is provided at the bottom of the fixed base, which is supported by the support foot to facilitate height adjustment and convenient installation and fixing.

[0028] The lifting hydraulic cylinder is connected to the hydraulic station through a control valve group, which includes a proportional directional valve 11, an electromagnetic reversing valve 12, a balancing valve 13 and a relief valve 14. The lifting hydraulic cylinder is connected to the hydraulic station through a control valve group, the P port of the proportional directional valve is connected to the oil supply main of the hydraulic station, the T port of the proportional directional valve is connected to the oil return main of the hydraulic station, the A port of the proportional directional valve is connected to the T port of the electromagnetic reversing valve, the B port of the proportional directional valve is connected to the P port of the electromagnetic reversing valve, the A port of the electromagnetic reversing valve is connected to the A port of the balancing valve, the B port of the electromagnetic reversing valve is connected to the rod cavity of the lifting hydraulic cylinder, the B port of the balancing valve is connected to the rodless cavity of the lifting hydraulic cylinder, the X port of the balancing valve is connected to the rod cavity of the lifting hydraulic cylinder, the pressure port M of the relief valve is connected to the rodless cavity of the lifting hydraulic cylinder, and the oil drain port T is connected to the oil drain main of the hydraulic station.

[0029] The specific action control process of the hydraulic valve group is:

[0030] When the lifting saddle is waiting for coil welding, the electromagnetic reversing valve is in the middle Y-type middle function, and the proportional directional valve is in the left closed state.

[0031] After the coil is connected, when the telescopic end of the hydraulic cylinder needs to contact the bottom of the lifting seat and start to lift the steel coil, the proportional directional valve switches to the right open state. After a delay of three seconds, the electromagnetic reversing valve switches to the right rising position. At the same time, by controlling the current input value of the proportional directional valve, the flow of the proportional directional valve is adjusted to achieve a reasonable lifting speed and ensure the smooth rise of the lifting seat. If the weight of the connected coil is too large, the overflow valve will enter the overflow state to prevent the hydraulic cylinder from overloading. In addition, if the rodless chamber of the lifting hydraulic cylinder is subjected to excessive pressure during the ascent and bursts, the balance valve will also work to prevent the lifting seat from falling and becoming unstable due to gravity.

[0032] When the displacement sensor detects that the set welding position has been reached, the electromagnetic reversing valve switches to the middle Y-type middle position function, and the proportional directional valve is in the left closed state. At this time, the hydraulic cylinder is quickly locked and the lifting seat enters the welding waiting state.

[0033] When the welding work of the welding machine is completed, the proportional directional valve switches to the right position and opens. After a delay of three seconds, the electromagnetic reversing valve switches to the left position and descends. At the same time, by controlling the current input value of the proportional directional valve, the flow of the proportional directional valve is adjusted to achieve a reasonable descending speed to ensure the smooth descent of the lifting seat. When the displacement sensor detects that it has reached the set standby position, the electromagnetic reversing valve switches to the Y-type middle position function. At this time, the balance valve locks the rodless chamber return oil of the oil cylinder because the control pressure is 0, allowing the lifting hydraulic cylinder to stop quickly. After the switching command of the electromagnetic reversing valve is delayed for three seconds, the proportional directional valve is in the left position and closed. The lifting seat enters the waiting state for the coil to be transferred away. After the coil is hoisted, it re-enters the waiting state for coil welding.

Claims

1. A heavy-duty lifting saddle driven by a single cylinder, characterized in that: It includes a fixed base, a lifting seat, a fixed saddle, a lifting hydraulic cylinder and a guiding device. A supporting seat is provided on the top of the fixed base, the supporting seat supports the lifting seat, the fixed saddle is installed on the top of the lifting seat, the telescopic end of the lifting hydraulic cylinder corresponds to the bottom center of the lifting seat, and the guiding device is correspondingly arranged on the lifting seat and the fixed base.

2. A heavy-duty lifting saddle driven by a single cylinder according to claim 1, characterized in that: The lifting hydraulic cylinder is connected to the hydraulic station through a control valve group, which includes a proportional directional valve, an electromagnetic reversing valve, a balancing valve and a relief valve. The P port of the proportional directional valve is connected to the oil supply main of the hydraulic station, the T port of the proportional directional valve is connected to the oil return main of the hydraulic station, the A port of the proportional directional valve is connected to the T port of the electromagnetic reversing valve, the B port of the proportional directional valve is connected to the P port of the electromagnetic reversing valve, the A port of the electromagnetic reversing valve is connected to the A port of the balancing valve, the B port of the electromagnetic reversing valve is connected to the rod cavity of the lifting hydraulic cylinder, the B port of the balancing valve is connected to the rodless cavity of the lifting hydraulic cylinder, the X port of the balancing valve is connected to the rod cavity of the lifting hydraulic cylinder, the pressure port M of the relief valve is connected to the rodless cavity of the lifting hydraulic cylinder, and the oil drain port T is connected to the oil drain main of the hydraulic station.

3. A heavy-duty lifting saddle driven by a single cylinder according to claim 1 or 2, characterized in that: The guide device comprises a guide rod and a guide sleeve. The top of the guide rod is fixedly connected to the lifting seat. A guide hole is provided on the fixed base at a position corresponding to the guide rod. The guide rod is embedded in the guide hole through the guide sleeve.

4. A heavy-duty lifting saddle driven by a single cylinder according to claim 3, characterized in that: The lifting seat is provided with two travel switches, which respectively correspond to the standby position and the upper limit position of the fixed saddle.

5. A heavy-load lifting saddle driven by a single cylinder according to claim 4, characterized in that: The lifting hydraulic cylinder is provided with a displacement sensor.

6. A heavy-load lifting saddle driven by a single cylinder according to claim 5, characterized in that: A cushion block is arranged on the working surface of the fixed saddle.

7. A heavy-load lifting saddle driven by a single cylinder according to claim 6, characterized in that: The bottom of the fixed base is provided with supporting feet.

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