A control oil circuit system for a slide block of a large flow hydraulic press equipment

Abstract

The utility model relates to the field of hydraulic press sliders, and in particular to a control oil circuit system for a slider of a large-flow hydraulic press equipment. The control oil circuit system includes a slider fast-down control oil circuit system, a slider slow-down control oil circuit system and a slider return control oil circuit system, and also includes a system pressure oil circuit, a return oil circuit and a control oil circuit, a cylinder piston chamber oil inlet A, a system oil inlet P, a cylinder rod chamber oil inlet B, and a tank return oil port T. In the slider fast-down control oil circuit system, the slider slow-down control oil circuit system and the slider return control oil circuit system, an electromagnetic reversing valve assembly, a cartridge valve assembly and a relief valve assembly are arranged; the electromagnetic reversing valve is used to control the cartridge valve to form a differential circuit, thereby controlling the slider to descend and return, thereby solving the problem that the rapid descending speed of the slider of the downward pressure hydraulic equipment control is not accurate enough and the existing differential circuit can pass a small flow rate.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic press slide blocks, in particular to a control oil circuit system for a slide block of a large-flow hydraulic press equipment. Background Art

[0002] The existing fast descending method of the slider is to let the slider fall quickly by free fall, and the speed control is not accurate. Other disadvantages include the need to add a filling valve and a filling tank. There are many accessories to add, and there are many risk points for hydraulic oil leakage. In the existing differential circuit, the electromagnetic reversing valve has a small diameter and cannot meet the faster descending speed. The manufacturing cost of increasing the diameter of the electromagnetic reversing valve is high.

[0003] Therefore, in response to the defects of the above-mentioned technology, the utility model proposes a control oil circuit system for the slider of a large-flow hydraulic press equipment, which forms a differential circuit by using an electromagnetic reversing valve to control a cartridge valve, thereby controlling the downward and return stroke of the slider, thereby solving the problem that the rapid downward speed of the control slider of the downward pressure hydraulic equipment is not accurate enough and the existing differential circuit can pass a small flow rate. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a control oil circuit system for a slide block of a large flow hydraulic press equipment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A control oil circuit system for a slider of a large-flow hydraulic press equipment includes a slider fast-down control oil circuit system, a slider slow-down control oil circuit system and a slider return control oil circuit system, and also includes a system pressure oil circuit, a return oil circuit and a control oil circuit, a cylinder piston chamber oil inlet A, a system oil inlet P, a cylinder rod chamber oil inlet B, and a tank return oil port T. The slider fast-down control oil circuit system, the slider slow-down control oil circuit system and the slider return control oil circuit system are all provided with an electromagnetic reversing valve assembly, a cartridge valve assembly and a relief valve assembly.

[0007] Furthermore, the electromagnetic reversing valve assembly includes multiple electromagnetic reversing valves, which are respectively represented by numbers YI-Y7, the cartridge valve assembly includes multiple cartridge valves, which are respectively represented by numbers W1-W6, the overflow valve assembly includes multiple high-pressure overflow valves and multiple low-pressure overflow valves, the multiple high-pressure overflow valves include high-pressure overflow valve F2 and high-pressure overflow valve F3, and the multiple low-pressure overflow valves include low-pressure overflow valve F1, low-pressure overflow valve F4 and low-pressure overflow valve F5.

[0008] Furthermore, the system oil inlet P establishes a control oil circuit connection with the electromagnetic reversing valve Y1 and the high-pressure relief valve F2 through the system pressure oil circuit; the system oil inlet P establishes a control oil circuit connection with the electromagnetic reversing valve Y5, the cartridge valve W4 and the cylinder piston chamber oil inlet A through the system pressure oil circuit; the system oil inlet P establishes a control oil circuit connection with the electromagnetic reversing valve Y7, the cartridge valve W6, the electromagnetic reversing valve Y6, the cartridge valve W5, the cylinder piston chamber oil inlet A and the cylinder rod chamber oil inlet B through the system pressure oil circuit.

[0009] Furthermore, the oil inlet B of the rod chamber of the oil cylinder is connected with the system oil inlet P through the cartridge valve W6 and the cartridge valve W5 in the return oil circuit and then enters the oil inlet A of the piston chamber of the oil cylinder to form a differential circuit system one; the oil inlet B of the rod chamber of the oil cylinder is connected with the system oil inlet P through the return oil circuit to form a differential circuit system two.

[0010] Furthermore, the system pressure oil circuit is connected to the electromagnetic reversing valve Y5 via a control oil circuit.

[0011] Furthermore, the oil return circuit is connected to the electromagnetic reversing valve Y7 and the low-pressure relief valve F4 via a control oil circuit; the system pressure oil circuit is connected to the electromagnetic reversing valve Y3 and the electromagnetic reversing valve Y6 via a control oil circuit.

[0012] Compared with the existing technology, the utility model has the following advantages:

[0013] The utility model proposes a control oil circuit system for a slider of a large-flow hydraulic press equipment, which forms a differential circuit by controlling a cartridge valve with an electromagnetic reversing valve, thereby controlling the downward and return stroke of the slider, solving the problems that the rapid downward speed of the slider control of the downward-pressing hydraulic equipment is not accurate enough and the existing differential circuit can pass a small flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a circuit principle structure diagram of the control oil circuit system in the utility model;

[0015] Figure 2 This is a circuit principle control structure diagram of the rapid downward movement of the slider in the utility model;

[0016] Figure 3 This is a circuit principle control structure diagram of the slow downward movement of the slider in the utility model;

[0017] Figure 4 This is a schematic diagram of the control structure of the return path of the slider in the utility model.

[0018] In the figure: 1-system pressure oil circuit; 2-return oil circuit; 3-control oil circuit; 4-oil inlet A of cylinder piston chamber; 5-system oil inlet P; 6-oil inlet B of cylinder rod chamber; 7-oil return port T of oil tank; 8-solenoid reversing valve Y1; 9-solenoid reversing valve Y2; 10-solenoid reversing valve Y3; 11-solenoid reversing valve Y4; 12-solenoid reversing valve Y5; 13-solenoid reversing valve Y6; 14-solenoid reversing valve Y7; 15-cartridge valve W1; 16-cartridge valve W2; 17-cartridge valve W3; 18-cartridge valve W4; 19-cartridge valve W5; 20-cartridge valve W6; 21-low-pressure relief valve F1; 22-high-pressure relief valve F2; 23-high-pressure relief valve F3; 24-low-pressure relief valve F4; 25-low-pressure relief valve F5. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1, a control oil circuit system for a large flow hydraulic press equipment slide, please refer to Figure 1-Figure 4 In the embodiment, a slider fast descending control oil circuit system, a slider slow descending control oil circuit system and a slider return control oil circuit system are included, and a system pressure oil circuit 1 is used to control the pressure of the slider, and a return oil circuit 2 and a control oil circuit 3 are included, a cylinder piston chamber oil inlet A4, a system oil inlet P5, a cylinder rod chamber oil inlet B6, and a tank return oil port T7 are provided in the slider fast descending control oil circuit system, the slider slow descending control oil circuit system and the slider return control oil circuit system. An electromagnetic reversing valve assembly, a cartridge valve assembly and a relief valve assembly are provided. In this embodiment, Figure 1 In the oil return line 2, the control cylinder has a rod chamber oil inlet B6 and a cartridge valve W6.

[0021] Example 2, based on the above implementation 1, please continue to refer to Figure 2-Figure 4 In the figure, the electromagnetic reversing valve assembly includes a plurality of electromagnetic reversing valves denoted by numbers YI-Y7, which are electromagnetic reversing valve Y1, electromagnetic reversing valve Y2, electromagnetic reversing valve Y3, electromagnetic reversing valve Y4, electromagnetic reversing valve Y5, electromagnetic reversing valve Y6 and electromagnetic reversing valve Y7.

[0022] Example 3, based on Example 1, please continue to refer to Figure 2-Figure 4In the embodiment, the cartridge valve assembly includes a plurality of cartridge valves numbered W1-W6, which are cartridge valve W1, cartridge valve W2, cartridge valve W3, cartridge valve W4, cartridge valve W5 and cartridge valve W6 respectively; the overflow valve assembly includes a plurality of high-pressure overflow valves and a plurality of low-pressure overflow valves; the plurality of high-pressure overflow valves include a high-pressure overflow valve F222 and a high-pressure overflow valve F323 respectively; the plurality of low-pressure overflow valves include a low-pressure overflow valve F121, a low-pressure overflow valve F424 and a low-pressure overflow valve F525; the return oil circuit 2 is connected to the electromagnetic reversing valve Y714 and the low-pressure overflow valve F424 through the control oil circuit 3; in the present embodiment, the system pressure oil circuit 1 is connected to the electromagnetic reversing valve Y310 and the electromagnetic reversing valve Y613 through the control oil circuit 3.

[0023] Example 4, please continue to refer to Figure 2-Figure 4 In the embodiment, the system oil inlet P5 establishes a control oil circuit connection with the electromagnetic reversing valve Y18 and the high-pressure relief valve F222 through the system pressure oil circuit 1, and then controls the electromagnetic reversing valve Y1 and the high-pressure relief valve F2; in the present embodiment, the system oil inlet P5 establishes a control oil circuit connection with the electromagnetic reversing valve Y512, the cartridge valve W418 and the cylinder piston chamber oil inlet A4 through the system pressure oil circuit 1; the system oil inlet P5 establishes a control oil circuit connection with the electromagnetic reversing valve Y714, the cartridge valve W620, the electromagnetic reversing valve Y613, the cartridge valve W519, the cylinder piston chamber oil inlet A4 and the cylinder rod chamber oil inlet B6 through the system pressure oil circuit 1; in the present embodiment, the system pressure oil circuit 1 is connected to the electromagnetic reversing valve Y512 through the control oil circuit 3.

[0024] Example 5, please continue to refer to Figure 2-Figure 4 In the oil cylinder, the rod chamber oil inlet B6 is connected with the system oil inlet P5 through the cartridge valve W620 and the cartridge valve W519 in the return oil circuit 2 and then enters the cylinder piston chamber oil inlet A4 to form a differential circuit system one; the rod chamber oil inlet B6 of the oil cylinder is connected with the system oil inlet P5 through the return oil circuit 2 to form a differential circuit system two.

[0025] Embodiment 6, a control method for a large flow hydraulic press equipment slider control oil circuit system, comprising any one of the large flow hydraulic press equipment slider control oil circuit system described above, wherein, please continue to refer to Figure 2 In the method of quickly descending the slider to control the oil circuit system, the method includes:

[0026] 1. The system oil inlet P5 supplies oil, and the solenoid reversing valve Y18 is energized and reversed. At this time, the system pressure is determined by the opening pressure of the high-pressure relief valve F222;

[0027] 2. The electromagnetic reversing valve Y512 is energized and the cartridge valve W418 is opened. The system pressure oil enters the oil inlet A4 of the cylinder piston chamber through the opened cartridge valve W418;

[0028] 3. The electromagnetic reversing valve Y714 is energized to change direction, the cartridge valve W620 is opened, the electromagnetic reversing valve Y613 is energized to change direction, the cartridge valve W519 is opened, and the return oil from the rod chamber oil inlet B6 of the oil cylinder passes through the opened cartridge valve W620 and cartridge valve W519 and the oil supplied from the system oil inlet P5 and enters the oil cylinder piston chamber oil inlet A4 to form a differential circuit;

[0029] 4. The differential circuit formed by the return oil from the rod chamber oil inlet B6 of the cylinder and the oil supply from the system oil inlet P5 increases the oil flow through the cylinder piston chamber oil inlet A4, and the master cylinder drives the slider downward at an increased speed.

[0030] Example 7, please continue to refer to Figure 3 In the method of controlling the oil circuit system when the slider moves down slowly, the method includes:

[0031] 1. The system oil inlet P5 supplies oil, and the solenoid reversing valve Y18 is energized and reversed. At this time, the system pressure is determined by the opening pressure of the high-pressure relief valve F222;

[0032] 2. The electromagnetic reversing valve Y512 is energized and the cartridge valve W418 is opened. The system pressure oil enters the oil inlet A4 of the cylinder piston chamber through the opened cartridge valve W418;

[0033] 3. The electromagnetic reversing valve Y714 is electrically reversed, the cartridge valve W620 is opened, the electromagnetic reversing valve Y411 is electrically reversed, the cartridge valve W317 is opened, and the return oil from the rod chamber oil inlet B6 of the oil cylinder passes through the opened cartridge valve W620 and cartridge valve W317 and returns to the oil tank;

[0034] 4. Due to the lack of a differential circuit formed by the return oil from the rod chamber oil inlet B6 and the oil supply from the system oil inlet P5, the oil flow through the cylinder piston chamber oil inlet A4 is reduced, and the downward speed of the slider driven by the master cylinder is reduced.

[0035] Example 8, please continue to refer to Figure 4 In the method of controlling the oil circuit system in the slider return stroke, the method includes:

[0036] 1. The system oil inlet P5 supplies oil, and the solenoid reversing valve Y29 is energized and reversed. At this time, the system pressure is determined by the opening pressure of the low-pressure relief valve F121;

[0037] 2. The electromagnetic reversing valve Y613 is energized and the cartridge valve W519 and cartridge valve W620 are opened. The system pressure oil passes through the opened cartridge valve W519 and cartridge valve W519 and enters the rod chamber oil inlet B6.

[0038] 3. The electromagnetic reversing valve Y310 is electrically switched, the cartridge valve W216 opens, and the return oil from the oil inlet A4 of the cylinder piston chamber passes through the opened cartridge valve W216 and returns to the oil tank. At this time, the master cylinder drives the slider to return.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control oil circuit system for a slider of a large flow hydraulic press, comprising a slider fast descending control oil circuit system, a slider slow descending control oil circuit system and a slider return control oil circuit system, characterized in that: It also includes a system pressure oil circuit (1), an oil return oil circuit (2) and a control oil circuit (3), an oil cylinder piston chamber oil inlet A (4), a system oil inlet P (5), an oil cylinder rod chamber oil inlet B (6), and an oil tank oil return port T (7). The slider fast descent control oil circuit system, the slider slow descent control oil circuit system and the slider return control oil circuit system are all provided with an electromagnetic reversing valve assembly, a cartridge valve assembly and a relief valve assembly; The electromagnetic reversing valve assembly includes a plurality of electromagnetic reversing valves, which are respectively indicated by numbers YI-Y7; the cartridge valve assembly includes a plurality of cartridge valves, which are respectively indicated by numbers W1-W6; the relief valve assembly includes a plurality of high-pressure relief valves and a plurality of low-pressure relief valves, the plurality of high-pressure relief valves include a high-pressure relief valve F2 (22) and a high-pressure relief valve F3 (23); the plurality of low-pressure relief valves include a low-pressure relief valve F1 (21), a low-pressure relief valve F4 (24) and a low-pressure relief valve F5 (25); the system oil inlet P (5) establishes a control oil circuit connection with the electromagnetic reversing valve Y1 (8) and the high-pressure relief valve F2 (22) through the system pressure oil circuit (1); the system oil inlet P (5) is connected to the electromagnetic reversing valve Y5 through the system pressure oil circuit (1). (12), the cartridge valve W4 (18) and the oil cylinder piston chamber oil inlet A (4) establish a control oil circuit connection; the system oil inlet P (5) establishes a control oil circuit connection with the solenoid reversing valve Y7 (14), the cartridge valve W6 (20), the solenoid reversing valve Y6 (13), the cartridge valve W5 (19), the oil cylinder piston chamber oil inlet A (4) and the oil cylinder rod chamber oil inlet B (6) through the system pressure oil circuit (1); the oil cylinder rod chamber oil inlet B (6) is connected to the system oil inlet P (5) through the cartridge valve W6 (20) and the cartridge valve W5 (19) in the return oil circuit (2) and then enters the oil cylinder piston chamber oil inlet A (4), forming a differential circuit system 1; the oil cylinder rod chamber oil inlet B (6) is connected to the system oil inlet P (5) through the return oil circuit (2) to form a differential circuit system 2.

2. The control oil circuit system for a slider of a large flow hydraulic press equipment according to claim 1, characterized in that: The system pressure oil circuit (1) is connected to the electromagnetic reversing valve Y5 (12) via a control oil circuit (3).

3. The control oil circuit system for a slider of a large flow hydraulic press equipment according to claim 2 is characterized in that: The return oil circuit (2) is connected to the electromagnetic reversing valve Y7 (14) and the low-pressure relief valve F4 (24) via a control oil circuit (3); the system pressure oil circuit (1) is connected to the electromagnetic reversing valve Y3 (10) and the electromagnetic reversing valve Y6 (13) via a control oil circuit (3).

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