A hydraulic system using a double-plunger manual pump to supply oil in equal quantities

Abstract

A hydraulic system using a double-plunger manual pump to supply oil in equal amounts is used to physically control the synchronous and asynchronous actions of hydraulic actuators. The oil inlet of the double-plunger manual pump is connected to the oil tank; one of the oil outlets is connected to the control valve one through a functional valve, and oil is discharged from the A oil outlet; the other oil outlet is connected to the control valve two through a sequence valve, and oil is discharged from the B oil outlet; the unloading valve oil outlet is connected to the oil tank, and a check valve six is ​​provided between the unloading valve oil inlet and the control valve one, and a check valve seven is provided between the unloading valve oil inlet and the control valve two; the double-plunger manual pump is also equipped with an oil replenishment hole for replenishing oil and maintaining pressure in the hydraulic system, and the oil replenishment hole is connected to the functional valve. The present invention can realize synchronous control of the hydraulic actuator through the control valve, with high synchronization accuracy, and can also realize asynchronous tilt angle control, flexibly control the state of the hydraulic actuator, and can also be used for replenishing oil and maintaining pressure in the hydraulic system. It can adapt to various industrial and mining industries and various extreme conditions, especially in a non-electric and non-magnetic environment.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical hydraulic equipment, and in particular to a hydraulic system which adopts a double-plunger manual pump and can physically control the synchronous and asynchronous tilt angles of a hydraulic actuator. Background Art

[0002] When more than two hydraulic actuators are used to drive hydraulic equipment, a very complex servo control system is often required to control the synchronization of the hydraulic actuators and the asynchronous action of adjusting the angle. However, the servo control system is expensive, especially in a specific environment without magnetism or electricity, and cannot be used. Therefore, it is becoming increasingly important to study a hydraulic system that uses a double-plunger manual pump to physically control the synchronous and asynchronous tilt angles of hydraulic actuators. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a hydraulic system that uses a double-plunger manual pump to supply oil in equal amounts, so as to achieve equal distribution of hydraulic oil and control any one oil outlet to supply oil alone while the other oil outlet does not supply oil.

[0004] To achieve the above-mentioned purpose of the invention, the oil inlet of the double-plunger manual pump of the present invention is connected to the oil tank via one-way valve 1 and one-way valve 2 respectively; one of the oil outlets of the double-plunger manual pump is connected to control valve 1 via one-way valve 3 through a functional valve, and oil is discharged from oil outlet A; the other oil outlet of the double-plunger manual pump is connected to control valve 2 via one-way valve 4 through a control sequence valve, and oil is discharged from oil outlet B; the oil outlet of the unloading valve is connected to the oil tank via one-way valve 5, a one-way valve 6 is provided between the oil inlet of the unloading valve and control valve 1, and a one-way valve 7 is provided between the oil inlet of the unloading valve and control valve 2; the double-plunger manual pump is also equipped with a hydraulic The oil replenishing hole for replenishing oil and maintaining pressure in the system is connected to the functional valve; the hand crank drives the plunger with upper and lower steps to reciprocate up and down in the cylinder body through the connecting rod, and the double-plunger manual pump simultaneously draws oil from the oil tank through the one-way valve 1 and the one-way valve 2, and separates two equal amounts of oil through the double-plunger manual pump, one through the one-way valve 3, and the other through the one-way valve 4 to discharge oil at the same time, and respectively pass through the functional valve and control valve 1, the sequence valve and the control valve 2 to discharge oil from the A oil outlet and the B oil outlet at the same time to realize synchronous control, or control the A oil outlet or the B oil outlet to discharge oil separately, and one of the oil flows returns to the oil tank to realize asynchronous control.

[0005] One end of the hand crank of the double-plunger manual pump is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the cylinder body, one end of the plunger with upper and lower steps is hinged to the middle part of the hand crank, the other end of the plunger with upper and lower steps is inserted into the cylinder body, the upper seal is installed between the upper step and the cylinder body, the lower seal is installed between the lower step and the cylinder body, and the upper and lower step plungers form upper and lower sealed cavities through the upper seal, the lower seal and the cylinder body.

[0006] The upper and lower step plungers of the upper and lower step plungers have equal cross-sectional areas, and the same strokes and speeds.

[0007] Compared with the prior art, the present invention has the following advantages:

[0008] 1. With the mechanical structure, the synchronization accuracy is not affected by various factors such as system pressure, flow, load, etc. The hydraulic actuator can be synchronously controlled through the control valve with high synchronization accuracy. It can also realize asynchronous tilt angle control, flexibly control the state of the hydraulic actuator, and can also be used for oil replenishment and pressure maintenance of the hydraulic system.

[0009] 2. In terms of product safety, since the product does not rely on magnetism or electricity, it has strong adaptability to the environment, especially it can work normally in an environment without electricity or magnetism.

[0010] 3. Small size, simple operation, convenient transportation, and can adapt to various industrial and mining and various extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the hydraulic principle diagram of the present invention.

[0012] Figure 2 for Figure 1 Schematic diagram of the structure of a double-plunger manual pump.

[0013] Figure 3 for Figure 1 Schematic diagram of the angle adjustment of the hydraulic actuator during asynchronous control.

[0014] Figure 4 It is a schematic diagram of the appearance of the present invention.

[0015] Figure 5 It is a schematic diagram of the positions of the oil outlets A, B, and NS of the present invention. DETAILED DESCRIPTION

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, one end of the hand crank 2 of the double-plunger manual pump 12 of the present invention is hinged to one end of the connecting rod 1, the other end of the connecting rod 1 is hinged to the cylinder body 6, one end of the plunger 3 with upper and lower steps is hinged to the middle part of the hand crank 2, the other end of the plunger 3 with upper and lower steps is inserted into the cylinder body 6, the upper seal 4 is installed between the upper step 7 and the cylinder body 6, the lower seal 5 is installed between the lower step 8 and the cylinder body 6, and the upper and lower step plungers 3 form upper and lower sealed cavities through the upper seal 4, the lower seal 5 and the cylinder body 6; the upper and lower step plungers of the upper and lower step plungers 3 are equal in cross-sectional area, and have the same stroke and speed.

[0017] The oil inlet of the double-plunger manual pump 12 is connected to the oil tank 9 via a one-way valve 10 and a one-way valve 11 respectively; one of the oil outlets of the double-plunger manual pump 12 is connected to the control valve 1 17 via a one-way valve 3 13 through a functional valve 15, and oil is discharged from the A oil outlet; the other oil outlet of the double-plunger manual pump 12 is connected to the control valve 2 18 via a one-way valve 4 14 through a control sequence valve 16, and oil is discharged from the B oil outlet; the oil outlet of the unloading valve 21 is connected to the oil tank 9 via a one-way valve 5 22, a one-way valve 6 20 is provided between the oil inlet of the unloading valve 21 and the control valve 1 17, and a one-way valve 7 19 is provided between the oil inlet of the unloading valve 21 and the control valve 2 18; the double-plunger manual pump 12 is also provided with an oil replenishment hole NS for replenishing oil and maintaining pressure in the hydraulic system, and the oil replenishment hole NS is connected to the functional valve 15.

[0018] The hand crank 2 drives the plunger 3 with upper and lower steps to reciprocate up and down in the cylinder body 6 through the connecting rod 1. The double-plunger manual pump 12 simultaneously draws oil from the oil tank 9 through the one-way valve 10 and the one-way valve 2 11, and separates two equal amounts of oil through the double-plunger manual pump 12; when the control valve 17 is opened and the unloading valve 21 is not opened, one of the oil flows through the functional valve 15 to the control valve 17, and the oil outlet A is discharged; when the sequence valve 16 and the control valve 2 18 are opened and the unloading valve 21 is not opened, the other oil of the double-outlet manual pump 12 flows through the sequence valve 16 to the control valve 2 18, and the oil outlet B is discharged. At this time, the oil outlets A and B are discharged at the same time. Figure 3 As shown, when the hydraulic system performs asynchronous control on the hydraulic actuator 1 23 and the hydraulic actuator 2 24 , an angle α is formed between the hydraulic actuator 1 23 and the hydraulic actuator 2 24 .

[0019] When only the A oil outlet is needed, the control sequence valve 16 and the control valve 1 17 are opened, and the function valve 15, the control valve 2 18 and the unloading valve 21 are not opened. At this time, the two oil paths flowing out of the double-outlet manual pump 12, one of which flows through the function valve 15 and the control valve 1 17 and flows out through the A oil outlet, and the other flows through the sequence valve 16 to the control valve 2 18. Since the control valve 2 18 is not opened, the oil flowing to the B oil outlet will be led back to the oil tank 9 under the action of the control valve 2 18; When only the B oil outlet is needed, the sequence valve 16 and the control valve 2 18 are opened, and the function valve 15, the control valve 1 17 and the unloading valve 21 are not opened. At this time, two oil paths flow out from the dual-oil outlet manual pump 12, one of which flows to the control valve 17 through the function valve 15. Since the control valve 17 is not opened, the oil flowing to the A oil outlet will be led back to the oil tank 9 under the action of the control valve 17, and the other oil path will be discharged through the B oil outlet via the sequence valve 16 and the control valve 2 18.

[0020] When the external hydraulic actuator only needs to unload from the A oil outlet to the oil tank 9, the functional valve 15 and the control valve 1 17 are opened, and the control valve 2 18 and the unloading valve 21 are not opened. At this time, the oil of the external hydraulic actuator flows from the A oil outlet through the control valve 1 17 and the functional valve 15, and is caused to flow to the oil tank 9 under the action of the functional valve 15; when the external hydraulic actuator only needs to unload from the B oil outlet to the oil tank 9, the control valve 2 18 is opened, and the control valve 1 17, the sequence valve 16 and the unloading valve 21 are not opened. At this time, the oil of the external hydraulic actuator flows from the B oil outlet through the control valve 2 18 to the sequence valve 16, and is caused to flow back to the oil tank 9 under the action of the sequence valve 16.

[0021] When the unloading valve 21 is opened, the oil outlets A and B are quickly unloaded, and the oil of the external hydraulic actuator passes through the oil outlets A and B, and then quickly returns to the oil tank 9 through the unloading valve 21.

[0022] When the system needs to be replenished with oil through the oil replenishing hole NS, the oil in the oil tank 9 is output through the double-outlet manual pump 12 to output two-way oil. One way of oil enters the oil replenishing hole NS through the opened functional valve 15, and the other way of oil enters the control valve 2 18 through the opened sequence valve 16, and flows back to the oil tank 9 under the action of the control valve 2 18. At this time, the functional valve 15 and the sequence valve 16 need to be opened, and the control valve 2 18, the control valve 1 17, and the unloading valve 21 do not need to be opened.

Claims

1. A hydraulic system using a double plunger manual pump to supply oil in equal quantities, Features: The oil inlet of the double plunger manual pump (12) is connected to the oil tank (9) via the one-way valve 1 (10) and the one-way valve 2 (11); one of the oil outlets of the double plunger manual pump (12) is connected to the control valve 1 (17) via the one-way valve 3 (13) through the function valve (15), and the oil is discharged from the oil outlet A; the other oil outlet of the double plunger manual pump (12) is connected to the control valve 2 (18) via the one-way valve 4 (14) through the sequence valve (16). ) and the oil is discharged from the oil outlet B; the oil outlet of the unloading valve (21) is connected to the oil tank (9) through the non-return valve five (22); a non-return valve six (20) is provided between the oil inlet of the unloading valve (21) and the control valve one (17); a non-return valve seven (19) is provided between the oil inlet of the unloading valve (21) and the control valve two (18); the double plunger manual pump (12) is also provided with an oil replenishment hole (NS) for replenishing oil and maintaining pressure in the hydraulic system. The oil hole (NS) is connected to the function valve (15); the hand crank (2) drives the plunger (3) with upper and lower steps to reciprocate up and down in the cylinder body (6) through the connecting rod (1); the double-plunger manual pump (12) simultaneously draws oil from the oil tank (9) through the one-way valve (10) and the two-way valve (11); two equal amounts of oil are separated by the double-plunger manual pump (12); one is discharged through the one-way valve (13) and the other is discharged through the one-way valve (14) at the same time; the oil is discharged from the A oil outlet and the B oil outlet simultaneously through the function valve (15) and the control valve (17), the sequence valve (16) and the control valve (18) respectively, to realize synchronous control, or to control the A oil outlet or the B oil outlet to discharge oil separately, and one of the oil flows returns to the oil tank (9) to realize asynchronous control; the hydraulic actuator (23) is connected to the A oil outlet, and the hydraulic actuator (24) is connected to the B oil outlet; One end of the hand crank (2) of the double-plunger manual pump (12) is hinged to one end of the connecting rod (1), the other end of the connecting rod (1) is hinged to the cylinder body (6), one end of the plunger (3) with upper and lower steps is hinged to the middle of the hand crank (2), the other end of the plunger (3) with upper and lower steps is inserted into the cylinder body (6), the upper seal (4) is installed between the upper step (7) and the cylinder body (6), the lower seal (5) is installed between the lower step (8) and the cylinder body (6), and the upper and lower step plungers (3) form upper and lower sealed cavities through the upper seal (4), the lower seal (5) and the cylinder body (6).

2. A hydraulic system using a double plunger manual pump to supply oil in equal amounts according to claim 1, Features: The upper and lower step plungers (3) have equal cross-sectional areas, and the same stroke and speed.

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