Novel hydraulic system of continuous casting withdrawal and straightening machine

Abstract

The utility model relates to the technical field of withdrawal and straightening machines, in particular to a novel continuous casting withdrawal and straightening machine hydraulic system which comprises a hydraulic cylinder, and a rod cavity and a rodless cavity of the hydraulic cylinder are communicated with a port A and a port B of a first electromagnetic reversing valve through oil pipelines respectively. A port T of the first electromagnetic reversing valve is communicated with an oil return port T of the hydraulic system through an oil pipeline; a port P of the first electromagnetic reversing valve is communicated with a pilot overflow valve through an oil pipeline, a port P of the pilot overflow valve is communicated with an oil inlet P of the hydraulic system through the oil pipeline, and a port T of the pilot overflow valve is communicated with an oil return port T of the hydraulic system through the oil pipeline; the pilot overflow valve is further sequentially connected with a second electromagnetic reversing valve, a third electromagnetic reversing valve and a pressure reducing valve through oil pipelines. The technical problems that in the prior art, a hydraulic system of a withdrawal and straightening machine is fixed in working pressure and lacks overload protection, and system faults cannot be handled in time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tension and straightening machines, in particular to a novel hydraulic system for a continuous casting tension and straightening machine. Background Art

[0002] In steelmaking and continuous casting, the straightening machine is a crucial piece of equipment used to straighten and flatten the cast steel. By stretching and bending the steel strip, the straightening machine can partially eliminate defects such as edge waves and L-shaped bends, thereby improving the strip's straightness and meeting the requirements of subsequent processing. The stretching and bending action of the straightening machine reduces subsequent deformation of the strip, resulting in a more uniform deformation and improving its processing performance.

[0003] In a straightening machine, the hydraulic control valve in the hydraulic system is responsible for controlling the pressure to achieve precise straightening of the metal sheet. By adjusting the response speed and accuracy of the hydraulic control valve, as well as the pressure drop and pressure stability of the hydraulic system, stable and good straightening results can be achieved on metal sheets of different materials and thicknesses.

[0004] However, the hydraulic systems used in existing straightening machines still have certain shortcomings: 1) The working pressure they can achieve is fixed and cannot be adjusted in real time according to the different processing materials and changes in process requirements; 2) There is a lack of overload protection. The traditional straightening machine hydraulic system lacks fault diagnosis capabilities, making it impossible to deal with overloads or system failures in a timely manner, resulting in equipment damage and even production safety accidents. Utility Model Content

[0005] The utility model provides a novel hydraulic system for a continuous casting straightening machine, which solves the technical problems in the prior art that the hydraulic system of the straightening machine has a fixed working pressure and lacks overload protection, and cannot handle system failures in a timely manner.

[0006] In order to solve the above problems, the new hydraulic system of the continuous casting straightening machine provided by the present invention adopts the following technical solutions:

[0007] A novel hydraulic system for a continuous casting straightening machine includes a hydraulic cylinder, wherein a rod chamber and a rodless chamber of the hydraulic cylinder are respectively connected to ports A and B of a first electromagnetic reversing valve through oil pipelines;

[0008] The T port of the first electromagnetic reversing valve is connected to the oil return port T port of the hydraulic system through an oil pipeline;

[0009] The P port of the first solenoid reversing valve is connected to the pilot relief valve through an oil pipeline, the P port of the pilot relief valve is connected to the oil inlet P port of the hydraulic system through an oil pipeline, and the T port of the pilot relief valve is connected to the oil return port T port of the hydraulic system through an oil pipeline;

[0010] The pilot relief valve is also connected in sequence to a second electromagnetic reversing valve, a third electromagnetic reversing valve and a pressure reducing valve through an oil pipeline.

[0011] Furthermore, the oil pipelines leading out of the rod chamber and the rodless chamber are provided with double one-way throttle valves, and the double one-way throttle valves are connected to the A port and the B port of the first electromagnetic reversing valve at the same time.

[0012] Furthermore, pressure sensors and high-pressure ball valves are arranged on the oil pipelines leading out of the rod chamber and the rodless chamber.

[0013] Furthermore, the A port of the third solenoid reversing valve is connected to the pressure reducing valve, and the P port of the third solenoid reversing valve is connected to the oil inlet of the pilot relief valve, and then the oil port of the rodless chamber of the hydraulic cylinder is connected through the first solenoid reversing valve to achieve the first-level low-pressure downward pressure.

[0014] Furthermore, the B port of the third solenoid reversing valve is connected to the pressure reducing valve, and the P port of the third solenoid reversing valve is connected to the oil inlet of the pilot relief valve, and then the oil port of the rodless chamber of the hydraulic cylinder is connected through the first solenoid reversing valve to achieve secondary pressure and medium pressure downward pressure.

[0015] Furthermore, the P port of the second electromagnetic reversing valve is connected to the oil inlet of the pilot relief valve, and then connected to the oil port of the rodless chamber of the hydraulic cylinder through the first electromagnetic reversing valve to achieve three-level pressure and high pressure downward pressure.

[0016] Furthermore, the T port of the second electromagnetic reversing valve and the T port of the third electromagnetic reversing valve are both connected to the oil drain port L of the hydraulic system through an oil pipeline.

[0017] Furthermore, a one-way valve is arranged on the oil pipeline between the pilot relief valve and the oil return port T of the hydraulic system, and a one-way valve is also arranged on the oil pipeline between the T port of the second solenoid reversing valve and the oil drain port L of the hydraulic system.

[0018] Furthermore, a high-pressure ball valve is also arranged on the oil pipeline between the pilot relief valve and the oil inlet P of the hydraulic system.

[0019] The beneficial effects of the new hydraulic system of continuous casting straightening machine provided by the utility model are:

[0020] 1) The newly added second and third electromagnetic reversing valves, in conjunction with the original first electromagnetic reversing valve, realize the three-speed preset variable pressure control of the tension and straightening machine. By controlling each electromagnetic reversing valve, the output pressure of the hydraulic system is adjusted to reach the preset working pressure value;

[0021] 2) Based on the pressure sensor's pressure detection of the rod cavity and the rodless cavity, combined with the preset process parameters, once an abnormal situation is found, such as overload, abnormal pressure, etc., an alarm signal can be immediately issued, which can facilitate the control system to quickly detect the working pressure and alarm, greatly ensuring the quality of the produced billets;

[0022] Through the above arrangement, the utility model effectively solves the technical problems in the prior art that the hydraulic system of the tension and straightening machine has a fixed working pressure and lacks overload protection, and cannot handle system failures in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0024] Figure 1 This is a schematic diagram of the hydraulic system of the new continuous casting straightening machine provided by the utility model.

[0025] Description of reference numerals:

[0026] 1. Hydraulic cylinder; 2. Oil pipeline; 3. First solenoid reversing valve; 4. Pilot relief valve; 5. Second solenoid reversing valve; 6. Third solenoid reversing valve; 7. Pressure reducing valve; 8. Double one-way throttle valve; 9. Pressure sensor; 10. High-pressure ball valve; 11. One-way valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that the main idea of ​​the present invention is to utilize the newly added second electromagnetic reversing valve 5 and the third electromagnetic reversing valve 6 to cooperate with the original first electromagnetic reversing valve 3 to realize the three-speed preset voltage control of the straightening machine, and adjust the output pressure of the hydraulic system by controlling each electromagnetic reversing valve to make it reach the preset working pressure value; according to the pressure sensor 9, the pressure detection of the rod cavity and the rodless cavity, combined with the preset process parameters, once an abnormal situation is found, such as overload, pressure abnormality, etc., an alarm signal can be immediately issued, which can facilitate the control system to quickly detect the working pressure and alarm, greatly ensuring the quality of the produced ingots; so as to solve the technical problems in the prior art that the working pressure of the hydraulic system of the straightening machine is fixed and lacks overload protection, and the system failure cannot be handled in time.

[0029] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. The numbers of any elements in the drawings are for illustration only and not for limitation, and any names are for distinction only and do not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] The embodiment of the novel hydraulic system of the continuous casting straightening machine provided by the utility model:

[0032] like Figure 1 As shown, the hydraulic system of the new continuous casting straightening machine includes a hydraulic cylinder 1 and a first electromagnetic reversing valve 3, wherein the rod chamber and the rodless chamber of the hydraulic cylinder 1 are respectively connected to the A port and the B port of the first electromagnetic reversing valve 3 through the oil pipeline 2; the T port of the first electromagnetic reversing valve 3 is connected to the oil return port T port of the hydraulic system through the oil pipeline 2; the P port of the first electromagnetic reversing valve 3 is connected to the pilot relief valve 4 through the oil pipeline 2, the P port of the pilot relief valve 4 is connected to the oil inlet P port of the hydraulic system through the oil pipeline 2, and the T port of the pilot relief valve 4 is connected to the oil return port T port of the hydraulic system through the oil pipeline 2.

[0033] On the basis of the above structure, the pilot relief valve 4 is further connected to the second electromagnetic reversing valve 5 , the third electromagnetic reversing valve 6 and the pressure reducing valve 7 in sequence through the oil pipeline 2 .

[0034] Regarding the oil pipelines 2 leading from the rod chamber and the rodless chamber, they are equipped with dual one-way throttle valves 8, which simultaneously connect to ports A and B of the first solenoid reversing valve 3. Pressure sensors 9 and high-pressure ball valves 10 are also installed on each of the oil pipelines 2 leading from the rod chamber and the rodless chamber.

[0035] Based on the pressure sensor 9's pressure detection of the rod and rodless chambers, combined with preset process parameters, an alarm signal can be immediately issued if an abnormality such as overload or abnormal pressure is detected, allowing the control system to quickly detect working pressure and issue an alarm. The main function of the high-pressure ball valve 10 is to cut off or connect the medium in the pipeline, controlling the flow of the medium by rotating the ball.

[0036] The following describes the functions of the third solenoid reversing valve 6 and the second solenoid reversing valve 5. Port A of the third solenoid reversing valve 6 is connected to the pressure reducing valve 7, and port P of the third solenoid reversing valve 6 is connected to the oil inlet of the pilot relief valve 4. This in turn connects to the oil port of the rodless chamber of the hydraulic cylinder 1 through the first solenoid reversing valve 3, achieving a low-pressure downward pressure at the first level.

[0037] The B port of the third solenoid reversing valve 6 is connected to the pressure reducing valve 7, and the P port of the third solenoid reversing valve 6 is connected to the oil inlet of the pilot relief valve 4, and then connected to the oil port of the rodless chamber of the hydraulic cylinder 1 through the first solenoid reversing valve 3 to achieve secondary pressure and medium pressure downward pressure.

[0038] The A port of the second electromagnetic reversing valve 5 is connected to the oil inlet of the pilot relief valve 4, and then connected to the oil port of the rodless chamber of the hydraulic cylinder 1 through the first electromagnetic reversing valve 3 to achieve three-level pressure and high pressure downward pressure.

[0039] At the same time, the T port of the second solenoid reversing valve 5 and the T port of the third solenoid reversing valve 6 are both connected to the hydraulic system's oil drain port L via oil pipeline 2. A check valve 11 is disposed on the oil pipeline 2 between the pilot relief valve 4 and the hydraulic system's oil return port T. A check valve 11 is also disposed on the oil pipeline 2 between the T port of the second solenoid reversing valve 5 and the hydraulic system's oil drain port L.

[0040] Finally, a high-pressure ball valve 10 is also arranged on the oil pipeline 2 between the pilot relief valve 4 and the oil inlet P of the hydraulic system.

[0041] The working principle of the hydraulic system of the new continuous casting straightening machine provided by the utility model is: based on the pressure detection of the rod cavity and the rodless cavity by the pressure sensor 9, combined with the preset process parameters, once an abnormal situation is found, such as overload, pressure abnormality, etc., an alarm signal can be immediately issued, which can facilitate the control system to quickly detect the working pressure and alarm. At the same time, the control system can also adjust the working status of the first electromagnetic reversing valve 3, the second electromagnetic reversing valve 5 and the third electromagnetic reversing valve 6 to realize the three-speed preset voltage change control of the straightening machine, that is, automatic three-speed voltage change can be realized, thereby better adapting to different processing materials and process requirements.

[0042] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings of this specification. They are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0043] In addition, in the description of this specification, “a plurality of” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A novel hydraulic system for a continuous casting straightening machine, comprising a hydraulic cylinder, wherein the rod chamber and the rodless chamber of the hydraulic cylinder are connected to the A port and the B port of the first electromagnetic reversing valve respectively through oil pipelines, characterized in that: The T port of the first electromagnetic reversing valve is connected to the oil return port T port of the hydraulic system through an oil pipeline; The P port of the first solenoid reversing valve is connected to the pilot relief valve through an oil pipeline, the P port of the pilot relief valve is connected to the oil inlet P port of the hydraulic system through an oil pipeline, and the T port of the pilot relief valve is connected to the oil return port T port of the hydraulic system through an oil pipeline; The pilot relief valve is also connected in sequence to a second electromagnetic reversing valve, a third electromagnetic reversing valve and a pressure reducing valve through an oil pipeline.

2. The novel hydraulic system for continuous casting and straightening machine according to claim 1 is characterized in that: The oil pipelines led out from the rod chamber and the rodless chamber are provided with double one-way throttle valves, which are connected to the A port and the B port of the first electromagnetic reversing valve at the same time.

3. The novel hydraulic system of continuous casting and straightening machine according to claim 2 is characterized in that: The oil pipelines leading out of the rod chamber and the rodless chamber are both provided with pressure sensors and high-pressure ball valves.

4. The novel hydraulic system for continuous casting and straightening machine according to claim 2 or 3, characterized in that: The A port of the third solenoid reversing valve is connected to the pressure reducing valve, and the P port of the third solenoid reversing valve is connected to the oil inlet of the pilot relief valve, and then the oil port of the rodless chamber of the hydraulic cylinder is connected through the first solenoid reversing valve to achieve the first-level low-pressure downward pressure.

5. The novel hydraulic system for continuous casting and straightening machine according to claim 4 is characterized in that: The B port of the third electromagnetic reversing valve is connected to the pressure reducing valve to achieve the secondary pressure medium pressure downward pressure.

6. The novel hydraulic system for continuous casting and straightening machine according to claim 5 is characterized in that: The P port of the second electromagnetic reversing valve is connected to the oil inlet of the pilot relief valve to achieve three-level pressure and high pressure downward pressure.

7. The novel hydraulic system for continuous casting and straightening machine according to claim 6 is characterized in that: The T port of the second electromagnetic reversing valve and the T port of the third electromagnetic reversing valve are both connected to the oil drain port L of the hydraulic system through an oil pipeline.

8. The novel hydraulic system for continuous casting and straightening machine according to claim 7 is characterized in that: A one-way valve is arranged on the oil pipeline between the pilot relief valve and the oil return port T of the hydraulic system, and a one-way valve is also arranged on the oil pipeline between the T port of the second electromagnetic reversing valve and the oil drain port L of the hydraulic system.

9. The novel hydraulic system for continuous casting and straightening machine according to any one of claims 1 to 3, characterized in that: A high-pressure ball valve is also arranged on the oil pipeline between the pilot relief valve and the oil inlet P of the hydraulic system.

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