Hydraulic system capable of realizing rapid back-and-forth movement of shear blade

Abstract

The utility model relates to the technical field of machine manufacturing, and provides a hydraulic system capable of realizing rapid back-and-forth movement of a shear blade, which comprises an oil tank, a first oil way, an electromagnetic directional valve, an oil pump, a second oil way, a shear oil cylinder, a third oil way, a fourth oil way and a fifth oil way, the other end of the first oil way is connected with a port P of the electromagnetic reversing valve, the oil pump is fixedly installed on the first oil way, a port B of the electromagnetic reversing valve is connected with one end of the second oil way, the other end of the second oil way is connected with a rodless cavity of the shearing oil cylinder, and a rod cavity of the shearing oil cylinder is connected with one end of the third oil way. The other end of the third oil way is connected with a cavity of the oil tank, a port T of the electromagnetic reversing valve is connected with one end of the fourth oil way, the other end of the fourth oil way is connected with the cavity of the oil tank, a port A of the electromagnetic reversing valve is connected with one end of the fifth oil way, and the other end of the fifth oil way is closed. The utility model has the advantages of quick response, quick action, safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a hydraulic system that enables the rapid reciprocating motion of the shear blade. Background Technology

[0002] A shearing cylinder is an actuator in a hydraulic system. It uses hydraulic oil as a power source and controls the flow of oil in and out of the cylinder by controlling the opening and closing of valves, thereby driving the piston rod to move the shear blade to perform a rapid shearing action.

[0003] Shearing cylinders have a wide range of applications, such as in metal processing, papermaking, and waste recycling, where they play a key role in improving production efficiency and work quality.

[0004] Common shearing cylinders are double-acting hydraulic cylinders. In some applications, the design of their hydraulic systems is not ideal, and the shearing cylinders cannot achieve rapid response, fast action, and safety and reliability. Utility Model Content

[0005] To address the aforementioned technical problem, a hydraulic system capable of enabling rapid reciprocating motion of the shear blade is provided.

[0006] The technical means adopted in this utility model are as follows:

[0007] A hydraulic system enabling rapid reciprocating motion of a shear blade includes an oil tank, a first oil circuit, a solenoid directional valve, an oil pump, a second oil circuit, a shearing cylinder, a third oil circuit, a fourth oil circuit, and a fifth oil circuit. The cavity of the oil tank is connected to one end of the first oil circuit, and the other end of the first oil circuit is connected to the P port of the solenoid directional valve. The oil pump is fixedly installed on the first oil circuit. The B port of the solenoid directional valve is connected to one end of the second oil circuit, and the other end of the second oil circuit is connected to the rodless chamber of the shearing cylinder. The rod chamber of the shearing cylinder is connected to one end of the third oil circuit, and the other end of the third oil circuit is connected to the cavity of the oil tank. The T port of the solenoid directional valve is connected to one end of the fourth oil circuit, and the other end of the fourth oil circuit is connected to the cavity of the oil tank. The A port of the solenoid directional valve is connected to one end of the fifth oil circuit, and the other end of the fifth oil circuit is closed.

[0008] Furthermore, it also includes a sixth oil circuit and an overflow valve; one end of the sixth oil circuit is connected to the portion of the first oil circuit located between the oil pump and the solenoid directional valve, and the other end of the sixth oil circuit is connected to the cavity of the oil tank, and the overflow valve is fixedly installed on the sixth oil circuit.

[0009] Furthermore, it also includes a one-way valve; the one-way valve is fixedly installed on the portion of the first oil line located between the oil pump and the sixth oil line.

[0010] Furthermore, it also includes a pressure gauge, a seventh oil circuit, and a pressure gauge switch; the detection end of the pressure gauge is connected to one end of the seventh oil circuit, the other end of the seventh oil circuit is connected to the portion of the first oil circuit located between the check valve and the sixth oil circuit, and the pressure gauge switch is fixedly installed on the seventh oil circuit.

[0011] Furthermore, it also includes a dual one-way throttle valve; the first throttle port of the dual one-way throttle valve is fixedly installed in the second oil line, and the second throttle port of the dual one-way throttle valve is fixedly installed in the fifth oil line.

[0012] Furthermore, the oil pump includes a gear pump and a motor; the gear pump is fixedly installed in the first oil circuit, and the motor shaft is coaxial and fixedly installed on the drive gear of the gear pump.

[0013] Furthermore, it also includes an oil filter; the oil filter is fixedly installed on one end of the first oil line that connects to the cavity of the oil tank.

[0014] Furthermore, it also includes an air filter; the air filter is fixedly installed inside the fuel tank cavity.

[0015] Furthermore, it also includes a liquid level and temperature gauge; the liquid level and temperature gauge is fixedly installed on the oil tank.

[0016] This utility model has the following advantages:

[0017] 1. In this utility model, the oil tank stores hydraulic oil. When the oil pump works, the hydraulic oil in the tank enters the solenoid directional valve through the first oil circuit under the action of the oil pump, energizing the coil of the solenoid directional valve. At this time, the valve core position of the solenoid directional valve changes, with port P communicating with port B and port T communicating with port A. The hydraulic oil in the solenoid directional valve enters the rodless chamber of the shearing cylinder through the second oil circuit and pushes the piston rod of the shearing cylinder to move, causing the shear blade mounted on the piston rod of the shearing cylinder to advance; energizing the solenoid valve... When the coil of the directional valve is de-energized, the valve core of the solenoid directional valve resets, and ports P, B, T, and A become connected. The piston rod of the shearing cylinder resets under the action of the return spring, and the hydraulic oil in the rodless chamber of the shearing cylinder returns to the oil tank in sequence through the second oil circuit, the solenoid directional valve, and the fourth oil circuit, causing the shear blade mounted on the piston rod of the shearing cylinder to retract. The movement of the shear blade on the piston rod of the shearing cylinder is controlled solely by the energization and de-energization of the solenoid directional valve, resulting in rapid response, fast action, and safety and reliability.

[0018] 2. In this utility model, the overflow valve is adjusted so that part of the hydraulic oil output by the oil pump returns to the oil tank through the sixth oil circuit, thereby ensuring that the pressure of the hydraulic oil output by the oil pump meets the working conditions.

[0019] 3. In this utility model, the check valve prevents hydraulic oil from flowing back into the oil pump.

[0020] 4. In this utility model, when the pressure gauge switch is turned on, the hydraulic oil output by the oil pump comes into contact with the detection end of the pressure gauge through the seventh oil circuit, thereby measuring the pressure of the hydraulic oil output by the oil pump.

[0021] 5. In this utility model, the flow rate of hydraulic oil in the second oil circuit is adjusted by regulating the double one-way throttle valve, thereby adjusting the feed speed of the shear blade installed on the piston rod of the shearing cylinder.

[0022] 6. In this utility model, the gear pump is driven by a motor to pump the hydraulic oil in the oil tank into the solenoid directional valve.

[0023] 7. In this utility model, the oil filter can remove impurities from the hydraulic oil.

[0024] 8. In this utility model, the air filter can remove dust, particulate matter, impurities and other pollutants from the gas in the fuel tank.

[0025] 9. In this utility model, the liquid level and temperature gauge can measure the liquid level and temperature of the hydraulic oil in the oil tank. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a hydraulic system capable of rapid reciprocating motion of the shear blade, as described in Embodiment 1 of this utility model.

[0028] Figure 2 This is a front view of the assembled hydraulic system of Embodiment 1 of this utility model, which enables the rapid reciprocating motion of the shear blade.

[0029] Figure 3 This is a top view of the assembled hydraulic system of Embodiment 1 of this utility model, which enables the rapid reciprocating motion of the shear blade.

[0030] Attached diagram reference numerals: 1-oil tank; 2-liquid level / temperature gauge; 3-air filter; 4-oil filter; 5-motor; 6-coupling; 7-gear pump; 8-relief valve; 9-pressure gauge switch; 10-pressure gauge; 11-check valve; 12-solenoid directional valve; 13-double one-way throttle valve; 14-shearing cylinder; 15-first oil circuit; 16-second oil circuit; 17-third oil circuit; 18-fourth oil circuit; 19-fifth oil circuit; 20-sixth oil circuit; 21-seventh oil circuit. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example 1:

[0033] like Figure 1 As shown, a hydraulic system capable of rapid reciprocating motion of the shear blade includes an oil tank 1, a first oil circuit 15, a solenoid directional valve 12, an oil pump, a second oil circuit 16, a shearing cylinder 14, a third oil circuit 17, a fourth oil circuit 18, and a fifth oil circuit 19. The cavity of the oil tank 1 is connected to one end of the first oil circuit 15, and the other end of the first oil circuit 15 is connected to the P port (oil inlet) of the solenoid directional valve 12. The oil pump is fixedly installed on the first oil circuit 15, and the B port (working oil inlet B) of the solenoid directional valve 12 is connected to the second oil circuit 16. The second oil circuit 16 is connected to the rodless chamber of the shearing cylinder 14. The rod chamber of the shearing cylinder 14 is connected to one end of the third oil circuit 17. The other end of the third oil circuit 17 is connected to the cavity of the oil tank 1. The T port (return port) of the electromagnetic reversing valve 12 is connected to one end of the fourth oil circuit 18. The other end of the fourth oil circuit 18 is connected to the cavity of the oil tank 1. The A port (working inlet A) of the electromagnetic reversing valve 12 is connected to one end of the fifth oil circuit 19. The other end of the fifth oil circuit 19 is closed.

[0034] Specifically, the shearing cylinder 14 is a single-acting cylinder.

[0035] In this embodiment, a sixth oil passage 20 and an overflow valve 8 are also included; one end of the sixth oil passage 20 is connected to the part of the first oil passage 15 located between the oil pump and the solenoid directional valve 12, and the other end of the sixth oil passage 20 is connected to the cavity of the oil tank 1. The overflow valve 8 is fixedly installed on the sixth oil passage 20.

[0036] Specifically, the overflow valve 8 is a stacked overflow valve 8.

[0037] In this embodiment, a one-way valve 11 is also included; the one-way valve 11 is fixedly installed on the portion of the first oil passage 15 located between the oil pump and the sixth oil passage 20.

[0038] In this embodiment, a pressure gauge 10, a seventh oil circuit 21, and a pressure gauge switch 9 are also included. The detection end of the pressure gauge 10 is connected to one end of the seventh oil circuit 21, and the other end of the seventh oil circuit 21 is connected to the part of the first oil circuit 15 located between the one-way valve 11 and the sixth oil circuit 20. The pressure gauge switch 9 is fixedly installed on the seventh oil circuit 21.

[0039] Specifically, the pressure gauge 10 is a shock-resistant pressure gauge 10.

[0040] In this embodiment, a dual one-way throttle valve 13 is also included; the first throttle port of the dual one-way throttle valve 13 is fixedly installed on the second oil passage 16, and the second throttle port of the dual one-way throttle valve 13 is fixedly installed on the fifth oil passage 19.

[0041] Specifically, the dual one-way throttle valve 13 is a superimposed dual one-way throttle valve 13.

[0042] In this embodiment, the oil pump includes a gear pump 7 and a motor 5; the gear pump 7 is fixedly installed on the first oil passage 15, and the shaft of the motor 5 is coaxially connected to the drive gear of the gear pump 7 via a coupling 6.

[0043] In this embodiment, an oil filter 4 is also included; the oil filter 4 is fixedly installed on the end of the first oil passage 15 that is connected to the cavity of the oil tank 1.

[0044] Specifically, the oil filter 4 is a mesh oil filter 4.

[0045] In this embodiment, an air filter 3 is also included; the air filter 3 is fixedly installed in the cavity of the fuel tank 1.

[0046] In this embodiment, a liquid level and thermometer 2 is also included; the liquid level and thermometer 2 is fixedly installed on the oil tank 1.

[0047] Specifically, this embodiment mainly targets the shearing of metal discs with a thickness of 6-8mm. The shearing force does not need to be too high. A gear pump 7 is selected, with a maximum pressure of 15MPa. The piston diameter of the shearing cylinder 14 is 80mm, and the stroke is 20mm. To achieve rapid reciprocating motion of the shearing cylinder 14, a single-acting cylinder with a flow rate of over 15L per minute is selected. To ensure a stable output pressure, an overflow valve 8 is installed at the pump outlet for regulating system pressure and pressure protection. To unload the pump during system standby, a neutral H-type solenoid directional valve 12 is selected, simplifying the valve assembly and reducing unnecessary energy loss. Simultaneously, to achieve controllable feed speed and maximum retraction speed for the shearing cylinder 14, a one-way throttle valve is used. The shear blade's movement is controlled solely by the energization and de-energization of the solenoid directional valve 12, and the shearing action time is less than 1 second.

[0048] In addition, the assembled structure diagram of this embodiment is as follows: Figure 2 and Figure 3 As shown.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hydraulic system capable of enabling rapid reciprocating motion of a shear blade, characterized in that, It includes an oil tank (1), a first oil circuit (15), a solenoid directional valve (12), an oil pump, a second oil circuit (16), a shearing cylinder (14), a third oil circuit (17), a fourth oil circuit (18), and a fifth oil circuit (19); The cavity of the oil tank (1) is connected to one end of the first oil circuit (15), and the other end of the first oil circuit (15) is connected to the P port of the electromagnetic reversing valve (12). The oil pump is fixedly installed on the first oil circuit (15). The B port of the electromagnetic reversing valve (12) is connected to one end of the second oil circuit (16). The other end of the second oil circuit (16) is connected to the rodless chamber of the shearing cylinder (14). The rod chamber of the shearing cylinder (14) is connected to one end of the third oil circuit (17). The other end of the third oil circuit (17) is connected to the cavity of the oil tank (1). The T port of the electromagnetic reversing valve (12) is connected to one end of the fourth oil circuit (18). The other end of the fourth oil circuit (18) is connected to the cavity of the oil tank (1). The A port of the electromagnetic reversing valve (12) is connected to one end of the fifth oil circuit (19). The other end of the fifth oil circuit (19) is closed.

2. The hydraulic system for achieving rapid reciprocating motion of the shear blade according to claim 1, characterized in that, It also includes a sixth oil passage (20) and an overflow valve (8); One end of the sixth oil circuit (20) is connected to the part of the first oil circuit (15) located between the oil pump and the solenoid reversing valve (12), and the other end of the sixth oil circuit (20) is connected to the cavity of the oil tank (1). The overflow valve (8) is fixedly installed on the sixth oil circuit (20).

3. The hydraulic system for rapid reciprocating motion of the shear blade according to claim 2, characterized in that, It also includes a check valve (11); The one-way valve (11) is fixedly installed on the part of the first oil circuit (15) located between the oil pump and the sixth oil circuit (20).

4. The hydraulic system for rapid reciprocating motion of the shear blade according to claim 3, characterized in that, It also includes a pressure gauge (10), a seventh oil circuit (21), and a pressure gauge switch (9); The detection end of the pressure gauge (10) is connected to one end of the seventh oil circuit (21), and the other end of the seventh oil circuit (21) is connected to the part of the first oil circuit (15) located between the check valve (11) and the sixth oil circuit (20). The pressure gauge switch (9) is fixedly installed on the seventh oil circuit (21).

5. A hydraulic system for achieving rapid reciprocating motion of the shear blade according to claim 1, characterized in that, It also includes a dual one-way throttle valve (13); The first throttle port of the dual one-way throttle valve (13) is fixedly installed on the second oil circuit (16), and the second throttle port of the dual one-way throttle valve (13) is fixedly installed on the fifth oil circuit (19).

6. The hydraulic system for realizing rapid reciprocating motion of the shear blade according to claim 1, characterized in that, The oil pump includes a gear pump (7) and a motor (5); The gear pump (7) is fixedly installed on the first oil circuit (15), and the shaft of the motor (5) is coaxial and fixedly installed on the drive gear of the gear pump (7).

7. A hydraulic system for realizing rapid reciprocating motion of the shear blade according to claim 1, characterized in that, It also includes an oil filter (4); The oil filter (4) is fixedly installed on the end of the first oil passage (15) that is connected to the cavity of the oil tank (1).

8. A hydraulic system for realizing rapid reciprocating motion of the shear blade according to claim 1, characterized in that, It also includes an air filter (3); The air filter (3) is fixedly installed in the cavity of the oil tank (1).

9. A hydraulic system for realizing rapid reciprocating motion of the shear blade according to claim 1, characterized in that, It also includes a liquid level and temperature gauge (2); The liquid level and temperature gauge (2) is fixedly installed on the oil tank (1).

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