Hydraulic shearing machine

Abstract

The utility model discloses a hydraulic shearing machine relates to shearing machine technical field, including shearing cylinder, rodless cavity control valve group and have pole cavity control valve group, and rodless cavity control valve group includes first shuttle valve control apron and first reversing valve, and first reversing valve is used for controlling the opening and closing of first shuttle valve control apron, and rodless cavity still communicates with oil tank through first valve group, and have pole cavity control valve group includes second shuttle valve control apron and second reversing valve, and second reversing valve is used for controlling the opening and closing of second shuttle valve control apron, and have pole cavity still communicates with oil tank through second valve group, the utility model discloses not only can improve the extension speed of piston rod in hydraulic shearing machine, realizes quick shearing, improves shearing efficiency, can also reduce the power requirement to hydraulic pump, and then reduces the cost of supporting equipment.

Description

Technical Field

[0001] This utility model relates to the field of shearing machine technology, and in particular to a hydraulic shearing machine. Background Technology

[0002] Hydraulic scrap shears play a vital role in scrap steel and metal processing. They can cut scrap steel, metal materials, scrap car bodies and parts, and even steel reinforcement structures, making them widely applicable in daily life. However, traditional hydraulic scrap shears have relatively small tonnage, complex hydraulic control systems, significant pressure loss, and low work efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic shearing machine to solve the problems existing in the prior art. It can not only increase the extension speed of the piston rod in the hydraulic shearing machine to achieve rapid shearing and improve shearing efficiency, but also reduce the power requirements of the hydraulic pump, thereby reducing the cost of supporting equipment.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] A hydraulic shearing machine includes a shearing cylinder, a rodless chamber control valve group, and a rod-side chamber control valve group. The shearing cylinder has a piston rod, a rod-side chamber, and a rodless chamber, with a cutter fixed to the end of the piston rod. The rodless chamber control valve group includes a first shuttle valve control cover and a first directional valve. The first directional valve controls the opening and closing of the first shuttle valve control cover. The first shuttle valve control cover includes a first cartridge valve and a first shuttle valve. Port A of the first cartridge valve is connected to an oil inlet, port B is connected to the rodless chamber and an oil return port, and port X is connected to port A of the first shuttle valve. Port P1 of the first shuttle valve is connected to port A of the first directional valve, and port P2 of the first shuttle valve is connected to the rodless chamber. Port P of the first directional valve... The rodless chamber is connected to the oil inlet; the rodless chamber is also connected to the oil tank through a first valve group; the rod chamber control valve group includes a second shuttle valve control cover and a second directional valve, the second directional valve is used to control the opening and closing of the second shuttle valve control cover, the second shuttle valve control cover includes a second cartridge valve and a second shuttle valve, the A port of the second cartridge valve is connected to the oil inlet, the B port is connected to the rod chamber, the X port is connected to the A port of the second directional valve, the A port of the second shuttle valve is connected to the P port of the second directional valve, the P1 port of the second shuttle valve is connected to the oil inlet, and the P2 port of the second shuttle valve is connected to the oil passage from the B port of the second cartridge valve to the rod chamber; the rod chamber is also connected to the oil tank through a second valve group.

[0006] In one embodiment, the first valve group includes a first dual-pressure regulating valve control cover and a third directional valve. The first dual-pressure regulating valve control cover includes a first pressure cartridge valve, a first relief valve, and a second relief valve. The A port of the first pressure cartridge valve is connected to the rodless chamber, the B port is connected to the oil tank, and the X port is connected to the oil inlet of the first relief valve and the oil inlet of the second relief valve. The P port of the third directional valve is connected to the A port of the first pressure cartridge valve, the T port of the third directional valve is connected to the oil tank, the A port of the third directional valve is connected to the X port of the first pressure cartridge valve, the B port of the third directional valve is connected to the oil outlet of the first relief valve, and the oil outlet of the second relief valve is connected to the oil tank.

[0007] In one embodiment, the second valve group includes a single-pressure regulating valve control cover and a fourth directional valve. The single-pressure regulating valve control cover includes a second pressure cartridge valve, a third relief valve, and a fourth relief valve. The A port of the second pressure cartridge valve is connected to the rod chamber, the B port is connected to the oil tank, the X port is connected to the oil inlet of the third relief valve, the oil inlet of the fourth relief valve, and the P port of the fourth directional valve, the oil outlet of the third relief valve is connected to the A port of the fourth directional valve, and the oil outlet of the fourth relief valve and the T port of the fourth directional valve are both connected to the oil tank.

[0008] As one embodiment, a third valve group is also included. The third valve group includes a second dual-pressure regulating valve control cover and a fifth directional valve. The second dual-pressure regulating valve control cover includes a fifth pressure cartridge valve, a fifth relief valve, and a sixth relief valve. The A port of the fifth pressure cartridge valve is connected to the oil inlet, the B port is connected to the oil tank, the X port is connected to the oil inlet of the fifth relief valve, the oil inlet of the sixth relief valve, and the P port of the fifth directional valve. The oil outlet of the fifth relief valve is connected to the B port of the fifth directional valve, the T port of the fifth directional valve is connected to the oil tank, and the oil outlet of the sixth relief valve is connected to the oil tank.

[0009] As one implementation, the first reversing valve, the second reversing valve, and the fourth reversing valve are all two-position four-way solenoid reversing valves.

[0010] As one implementation, both the third directional valve and the fifth directional valve are three-position four-way solenoid directional valves.

[0011] As one embodiment, the overflow pressure of the first overflow valve is less than that of the second overflow valve, the overflow pressure of the third overflow valve is less than that of the fourth overflow valve, and the overflow pressure of the fifth overflow valve is less than that of the sixth overflow valve.

[0012] As one embodiment, a first pressure testing connector and a second pressure testing connector are respectively provided on the oil line between the B port of the first cartridge valve and the rodless chamber, and on the oil line between the B port of the second cartridge valve and the rod chamber. Both the first pressure testing connector and the second pressure testing connector are used to connect a pressure sensor.

[0013] As one implementation, two shear cylinders are arranged in parallel.

[0014] As one embodiment, it also includes a hydraulic control valve block, which integrates an oil inlet, an oil outlet, a shear retraction port, a shear extension port, a rodless chamber control valve group, a rod chamber control valve group, a first valve group, a second valve group, and a third valve group. The oil inlet is used to connect to an oil pump, the oil outlet is used to connect to an oil tank, the shear extension port communicates with port B of the first cartridge valve and is used to connect to the rodless chamber, and the shear retraction port communicates with port B of the second cartridge valve and is used to connect to the rod chamber.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The hydraulic shearing machine of this invention, through the design of the rodless chamber control valve group and the rod chamber control valve group, enables hydraulic oil from the rod chamber to enter the rodless chamber when the piston rod extends, and prevents hydraulic oil from the rodless chamber from entering the rod chamber when the piston rod retracts. This design increases the extension speed of the piston rod in the hydraulic shearing machine, achieving rapid shearing and improving shearing efficiency. It also reduces the power requirements of the hydraulic pump, thereby lowering the cost of supporting equipment. Furthermore, the hydraulic shearing machine of this invention, through the cooperation of cartridge valves, shuttle valves, and directional valves, possesses powerful high-flow, high-pressure processing capabilities, as well as extremely low pressure loss and high system efficiency, which can improve the shearing force of the hydraulic shearing machine. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the control principle of a hydraulic shearing machine in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a hydraulic control valve block in one embodiment of the present invention;

[0020] Figure 3This diagram illustrates the relationship between the operation of the hydraulic shearing machine and the energization status of each solenoid valve in the hydraulic control valve block in one embodiment of this utility model.

[0021] Among them, 1. Shearing cylinder;

[0022] 2. Rodless chamber control valve assembly; 21. First directional valve; 22. First cartridge valve; 23. First shuttle valve;

[0023] 3. Rod-type chamber control valve assembly; 31. Second directional valve; 32. Second cartridge valve; 33. Second shuttle valve;

[0024] 4. First valve assembly; 41. First pressure cartridge valve; 42. First relief valve; 43. Second relief valve; 44. Third directional valve;

[0025] 5. Second valve assembly; 51. Second pressure cartridge valve; 52. Third relief valve; 53. Fourth relief valve; 54. Fourth directional valve;

[0026] 6. Third valve assembly; 61. Third pressure cartridge valve; 62. Fifth relief valve; 63. Sixth relief valve; 64. Fifth directional valve;

[0027] 7. First pressure test connector;

[0028] 8. Second pressure test connector;

[0029] 9. Cut the retracted opening;

[0030] 10. Cut the protruding opening. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] The purpose of this invention is to provide a hydraulic shearing machine to solve the problems existing in the prior art. It can not only increase the extension speed of the piston rod in the hydraulic shearing machine to achieve rapid shearing and improve shearing efficiency, but also reduce the power requirements of the hydraulic pump, thereby reducing the cost of supporting equipment.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Please refer to Figures 1 to 3 This embodiment provides a hydraulic shearing machine, including a shearing cylinder 1, a rodless chamber control valve group 2, and a rod chamber control valve group 3. The shearing cylinder 1 has a piston rod, a rod chamber, and a rodless chamber, and a cutter is fixed to the end of the piston rod. The rodless chamber control valve group 2 includes a first shuttle valve 23 control cover plate and a first directional valve 21. The first directional valve 21 is used to control the opening and closing of the first shuttle valve 23 control cover plate. The first shuttle valve 23 control cover plate includes a first cartridge valve 22 and a first shuttle valve 23. The A port of the first cartridge valve 22 is connected to the oil inlet 11, the B port is connected to the rodless chamber and the oil return port, and the X port is connected to the A port of the first shuttle valve 23. The P1 port of the first shuttle valve 23 is connected to the A port of the first directional valve 21, and the P2 port of the first shuttle valve 23 is connected to the rodless chamber. Port P of valve 21 is connected to inlet port 11; the rodless chamber is also connected to the oil tank through the first valve group 4; the rod chamber control valve group 3 includes a second shuttle valve 33 control cover and a second directional valve 31. The second directional valve 31 is used to control the opening and closing of the second shuttle valve 33 control cover. The second shuttle valve 33 control cover includes a second cartridge valve 32 and a second shuttle valve 33. Port A of the second cartridge valve 32 is connected to inlet port 11, port B is connected to the rod chamber, and port X is connected to port A of the second directional valve 31. Port A of the second shuttle valve 33 is connected to port P of the second directional valve 31. Port P1 of the second shuttle valve 33 is connected to inlet port 11, and port P2 of the second shuttle valve 33 is connected to the oil passage from port B of the second cartridge valve 32 to the rod chamber; the rod chamber is also connected to the oil tank through the second valve group 5.

[0035] After the rodless chamber control valve group 2 and the rod chamber control valve group 3 are connected to the shearing cylinder 1, when the piston rod needs to extend for shearing, the first reversing valve 21 and the second reversing valve 31 are activated, opening the control cover plates of the first shuttle valve 23 and the second shuttle valve 33. Hydraulic oil can enter the rodless chamber and the rod chamber. However, the force-bearing area of ​​the rodless chamber is larger than that of the rod chamber, resulting in different pressures at both ends of the piston. The piston rod extends. After the control cover plate of the second shuttle valve 33 is opened, the hydraulic oil in the rod chamber can return to the oil inlet circuit through the second cartridge valve 32 and then return to the rodless chamber. When the piston rod needs to retract, the control cover plate of the second shuttle valve 33 is opened and the control cover plate of the first shuttle valve 23 is closed. Oil enters the rod chamber and oil exits the rodless chamber back to the oil tank, and the piston rod retracts.

[0036] In this embodiment, the hydraulic shearing machine, through the design of the rodless chamber control valve group 2 and the rod chamber control valve group 3, allows hydraulic oil from the rod chamber to enter the rodless chamber when the piston rod extends, and prevents hydraulic oil from entering the rod chamber when the piston rod retracts. This design increases the piston rod extension speed, enabling rapid shearing and improving shearing efficiency. It also reduces the power requirements of the hydraulic pump, thereby lowering the cost of supporting equipment. Furthermore, the hydraulic shearing machine in this embodiment, through the cooperation of cartridge valves, shuttle valves, and directional valves, possesses powerful high-flow, high-pressure processing capabilities, as well as extremely low pressure loss and high system efficiency, which can improve the shearing force of the hydraulic shearing machine.

[0037] In this embodiment, the first valve group 4 includes a first dual-pressure regulating valve control cover and a third directional valve 44. The first dual-pressure regulating valve control cover includes a first pressure cartridge valve 41, a first relief valve 42, and a second relief valve 43. The A port of the first pressure cartridge valve 41 is connected to the rodless chamber, the B port is connected to the oil tank, and the X port is connected to the oil inlet 11 of the first relief valve 42 and the oil inlet 11 of the second relief valve 43. The P port of the third directional valve 44 is connected to the A port of the first pressure cartridge valve 41, the T port of the third directional valve 44 is connected to the oil tank, the A port of the third directional valve 44 is connected to the X port of the first pressure cartridge valve 41, the B port of the third directional valve 44 is connected to the oil outlet 12 of the first relief valve 42, and the oil outlet 12 of the second relief valve 43 is connected to the oil tank. The third directional valve 44 has at least three reversing positions, which can respectively control the X port of the first pressure cartridge valve 41 to be directly connected to the first relief valve 42, the second relief valve 43, or the oil tank. When oil returns from the rodless chamber, the X port of the first pressure cartridge valve 41 is connected to the oil tank, facilitating rapid oil return from the rodless chamber; when oil enters the rodless chamber, the X port of the first pressure cartridge valve 41 is connected to the first relief valve 42 or the second relief valve 43. The relief pressures of the first relief valve 42 and the second relief valve 43 are different, thereby controlling the working pressure of the rodless chamber and ensuring the safe and stable operation of the equipment.

[0038] In this embodiment, the second valve group 5 includes a single-pressure regulating valve control cover and a fourth directional valve 54. The single-pressure regulating valve control cover includes a second pressure cartridge valve 51, a third relief valve 52, and a fourth relief valve 53. The A port of the second pressure cartridge valve 51 is connected to the rod chamber, the B port is connected to the oil tank, and the X port is connected to the oil inlet 11 of the third relief valve 52, the oil inlet 11 of the fourth relief valve 53, and the P port of the fourth directional valve 54. The oil outlet 12 of the third relief valve 52 is connected to the A port of the fourth directional valve 54, and the oil outlet 12 of the fourth relief valve 53 and the T port of the fourth directional valve 54 are both connected to the oil tank. Similarly, the single-pressure regulating valve control cover can control the working pressure when oil enters the rod chamber. Furthermore, when oil enters the rodless chamber, the X port of the second pressure cartridge valve 51 can be connected to the third relief valve 52 with lower pressure, so that the hydraulic oil flowing out of the rod chamber can return to the oil tank after meeting a certain pressure.

[0039] This embodiment also includes a third valve group 6, which includes a second dual-pressure regulating valve control cover and a fifth directional valve 64. The second dual-pressure regulating valve control cover includes a fifth pressure cartridge valve, a fifth relief valve 62, and a sixth relief valve 63. The A port of the fifth pressure cartridge valve is connected to the oil inlet 11, the B port is connected to the oil tank, the X port is connected to the oil inlet 11 of the fifth relief valve 62, the oil inlet 11 of the sixth relief valve 63, and the P port of the fifth directional valve 64. The oil outlet 12 of the fifth relief valve 62 is connected to the B port of the fifth directional valve 64, the T port of the fifth directional valve 64 is connected to the oil tank, and the oil outlet 12 of the sixth relief valve 63 is connected to the oil tank. The fifth directional valve 64 has at least three switching positions, enabling the X port of the third pressure cartridge valve 61 to connect to the fifth relief valve 62, the sixth relief valve 63, or the oil tank to control the oil circuit pressure. The overflow pressure of the fifth relief valve 62 can be 15MPa, and the overflow pressure of the sixth relief valve 63 can be 20MPa.

[0040] In this embodiment, the first reversing valve 21, the second reversing valve 31, and the fourth reversing valve 54 are all two-position four-way solenoid reversing valves. In this embodiment, the third reversing valve 44 and the fifth reversing valve 64 are both three-position four-way solenoid reversing valves.

[0041] In this embodiment, the overflow pressure of the first overflow valve 42 is less than that of the second overflow valve 43, the overflow pressure of the third overflow valve 52 is less than that of the fourth overflow valve 53, and the overflow pressure of the fifth overflow valve 62 is less than that of the sixth overflow valve 63.

[0042] In this embodiment, a first pressure testing connector 7 and a second pressure testing connector 8 are respectively provided on the oil line between port B of the first cartridge valve 22 and the rodless chamber, and on the oil line between port B of the second cartridge valve 32 and the rod chamber. Both the first pressure testing connector 7 and the second pressure testing connector 8 are used to connect pressure sensors.

[0043] In this embodiment, two shear cylinders 1 are connected in parallel.

[0044] This embodiment also includes a hydraulic control valve block, which integrates an oil inlet 11, an oil outlet 12, a shear retraction port 9, a shear extension port 10, a rodless chamber control valve group 2, a rod chamber control valve group 3, a first valve group 4, a second valve group 5, and a third valve group 6. The oil inlet 11 is used to connect to the oil pump, the oil outlet 12 is used to connect to the oil tank, the shear extension port 10 is connected to port B of the first cartridge valve 22 and is used to connect to the rodless chamber, and the shear retraction port 9 is connected to port B of the second cartridge valve 32 and is used to connect to the rod chamber.

[0045] In the embodiments of this application, the same reference numerals are used to denote the same component or part.

[0046] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0047] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic shearing machine, characterized in that, include: A shearing cylinder having a piston rod, a rod chamber, and a rodless chamber, with a cutter fixed to the end of the piston rod; A rodless chamber control valve assembly includes a first shuttle valve control cover and a first directional valve. The first directional valve controls the opening and closing of the first shuttle valve control cover. The first shuttle valve control cover includes a first cartridge valve and a first shuttle valve. Port A of the first cartridge valve is connected to the oil inlet, port B is connected to the rodless chamber and the oil return port, and port X is connected to port A of the first shuttle valve. Port P1 of the first shuttle valve is connected to port A of the first directional valve, port P2 of the first shuttle valve is connected to the rodless chamber, and port P of the first directional valve is connected to the oil inlet. The rodless chamber is also connected to the oil tank through the first valve assembly. The system includes a rod-side control valve assembly, comprising a second shuttle valve control cover and a second directional valve. The second directional valve controls the opening and closing of the second shuttle valve control cover. The second shuttle valve control cover includes a second cartridge valve and a second shuttle valve. The A port of the second cartridge valve is connected to the oil inlet, the B port is connected to the rod-side chamber, and the X port is connected to the A port of the second directional valve. The A port of the second shuttle valve is connected to the P port of the second directional valve. The P1 port of the second shuttle valve is connected to the oil inlet, and the P2 port of the second shuttle valve is connected to the oil passage from the B port of the second cartridge valve to the rod-side chamber. The rod-side chamber is also connected to the oil tank via the second valve assembly.

2. The hydraulic shearing machine according to claim 1, characterized in that, The first valve group includes a first dual-pressure regulating valve control cover and a third directional valve. The first dual-pressure regulating valve control cover includes a first pressure cartridge valve, a first relief valve, and a second relief valve. The A port of the first pressure cartridge valve is connected to the rodless chamber, the B port is connected to the oil tank, and the X port is connected to the oil inlet of the first relief valve and the oil inlet of the second relief valve. The P port of the third directional valve is connected to the A port of the first pressure cartridge valve, the T port of the third directional valve is connected to the oil tank, the A port of the third directional valve is connected to the X port of the first pressure cartridge valve, the B port of the third directional valve is connected to the oil outlet of the first relief valve, and the oil outlet of the second relief valve is connected to the oil tank.

3. The hydraulic shearing machine according to claim 2, characterized in that, The second valve group includes a single-pressure regulating valve control cover and a fourth directional valve. The single-pressure regulating valve control cover includes a second pressure cartridge valve, a third relief valve, and a fourth relief valve. The A port of the second pressure cartridge valve is connected to the rod chamber, the B port is connected to the oil tank, the X port is connected to the oil inlet of the third relief valve, the oil inlet of the fourth relief valve, and the P port of the fourth directional valve, the oil outlet of the third relief valve is connected to the A port of the fourth directional valve, and the oil outlet of the fourth relief valve and the T port of the fourth directional valve are both connected to the oil tank.

4. The hydraulic shearing machine according to claim 3, characterized in that, It also includes a third valve group, which includes a second dual-pressure regulating valve control cover and a fifth directional valve. The second dual-pressure regulating valve control cover includes a fifth pressure cartridge valve, a fifth relief valve, and a sixth relief valve. The A port of the fifth pressure cartridge valve is connected to the oil inlet, the B port is connected to the oil tank, the X port is connected to the oil inlet of the fifth relief valve, the oil inlet of the sixth relief valve, and the P port of the fifth directional valve. The oil outlet of the fifth relief valve is connected to the B port of the fifth directional valve, the T port of the fifth directional valve is connected to the oil tank, and the oil outlet of the sixth relief valve is connected to the oil tank.

5. The hydraulic shearing machine according to claim 4, characterized in that, The first reversing valve, the second reversing valve, and the fourth reversing valve are all two-position four-way solenoid reversing valves.

6. The hydraulic shearing machine according to claim 5, characterized in that, Both the third and fifth directional valves are three-position four-way solenoid directional valves.

7. The hydraulic shearing machine according to claim 6, characterized in that, The overflow pressure of the first overflow valve is less than that of the second overflow valve, the overflow pressure of the third overflow valve is less than that of the fourth overflow valve, and the overflow pressure of the fifth overflow valve is less than that of the sixth overflow valve.

8. The hydraulic shearing machine according to claim 7, characterized in that, A first pressure testing connector and a second pressure testing connector are respectively provided on the oil line between port B of the first cartridge valve and the rodless chamber, and on the oil line between port B of the second cartridge valve and the rod chamber. Both the first pressure testing connector and the second pressure testing connector are used to connect pressure sensors.

9. The hydraulic shearing machine according to claim 1, characterized in that, Two shear cylinders are connected in parallel.

10. The hydraulic shearing machine according to claim 8, characterized in that, It also includes a hydraulic control valve block, which integrates an oil inlet, an oil outlet, a shear retraction port, a shear extension port, a rodless chamber control valve group, a rod chamber control valve group, a first valve group, a second valve group, and a third valve group. The oil inlet is used to connect to an oil pump, the oil outlet is used to connect to an oil tank, the shear extension port is connected to port B of the first cartridge valve and is used to connect to the rodless chamber, and the shear retraction port is connected to port B of the second cartridge valve and is used to connect to the rod chamber.

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