Hydraulic system

Abstract

The utility model discloses a hydraulic system, which relates to the technical field of hydraulic control systems and comprises a first electromagnetic directional valve, a second electromagnetic directional valve and a first one-way valve, a P port of the first electromagnetic directional valve is connected and communicated with an oil inlet path, and a B port of the first electromagnetic directional valve is communicated with a main cylinder rod cavity. A P port of the second electromagnetic directional valve is communicated with a main cylinder piston cavity, a B port of the second electromagnetic directional valve is communicated with an oil inlet of the first one-way valve, and an oil outlet of the first one-way valve is communicated with a main cylinder rod cavity; when a first electromagnet of the first electromagnetic directional valve is electrified, a port P of the first electromagnetic directional valve can be communicated with a port B of the first electromagnetic directional valve, and when the first electromagnet of the first electromagnetic directional valve is electrified, a first electromagnet of the second electromagnetic directional valve is electrified; a first electromagnet of the second electromagnetic directional valve is electrified to enable a port P of the second electromagnetic directional valve to be communicated with a port B of the second electromagnetic directional valve; the forward speed of the main cylinder can be increased, the efficiency is high, and the energy-saving effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control systems, in particular to a hydraulic system. Background Art

[0002] With the rapid development of production level and the gradual maturity of hydraulic equipment, the efficiency and speed of forging equipment have become the development direction. Forging equipment manufacturers have higher and higher requirements for increasing speed and reducing energy consumption. The structure of conventional hydraulic system is relatively complex, resulting in high failure rate, serious leakage, low efficiency, unreliable action, and basically increasing the speed by increasing the number of pump groups, which increases both energy consumption and equipment cost. Utility Model Content

[0003] The purpose of the utility model is to provide a hydraulic system to solve the problems existing in the above-mentioned prior art, which can increase the forward speed of the master cylinder, prolong the service life, ensure the stability of the system, have high reliability, high efficiency, good energy-saving effect and low cost.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a hydraulic system, comprising a first solenoid reversing valve, a second solenoid reversing valve and a first non-return valve, wherein the P port of the first solenoid reversing valve is connected and communicated with an oil inlet circuit, the B port of the first solenoid reversing valve is communicated with a master cylinder rod chamber, the P port of the second solenoid reversing valve is communicated with a master cylinder plug chamber, the B port of the second solenoid reversing valve is communicated with an oil inlet port of the first non-return valve, and the oil outlet port of the first non-return valve is communicated with the master cylinder rod chamber; the first electromagnet of the first solenoid reversing valve is energized to enable the P port of the first solenoid reversing valve to be communicated with the B port of the first solenoid reversing valve, when the first electromagnet of the first solenoid reversing valve is energized, the first electromagnet of the second solenoid reversing valve is energized, and the first electromagnet of the second solenoid reversing valve is energized to enable the P port of the second solenoid reversing valve to be communicated with the B port of the second solenoid reversing valve.

[0006] Preferably, the T port of the first electromagnetic reversing valve is connected to the oil pool.

[0007] Preferably, the A port of the first solenoid reversing valve is connected with the A port of the second solenoid reversing valve, and when the second electromagnet of the first solenoid reversing valve is energized, the P port of the first solenoid reversing valve can be connected with the A port of the first solenoid reversing valve, and when the second electromagnet of the first solenoid reversing valve is energized, the first electromagnet of the second solenoid reversing valve is de-energized, and when the first electromagnet of the second solenoid reversing valve is de-energized, the P port of the second solenoid reversing valve can be connected with the A port of the second solenoid reversing valve.

[0008] Preferably, a first pressure gauge and a first overflow valve are provided on the oil inlet circuit, the first pressure gauge can detect the oil pressure of the oil inlet circuit, and the overflow port of the first overflow valve is connected to the oil pool.

[0009] Preferably, a second one-way valve is provided between port B of the first solenoid reversing valve and the master cylinder rod chamber, the oil inlet of the second one-way valve is connected to port B of the first solenoid reversing valve, and the oil outlet of the second one-way valve is connected to the master cylinder rod chamber.

[0010] Preferably, a rod chamber oil supply circuit is provided between the oil outlet of the second one-way valve and the master cylinder rod chamber, the first end of the rod chamber oil supply circuit is connected to the master cylinder rod chamber, the second end of the rod chamber oil supply circuit is connected to the oil outlet of the second one-way valve, and the second end of the rod chamber oil supply circuit is connected to the oil outlet of the first one-way valve.

[0011] Preferably, a second pressure gauge is provided on the rod chamber oil supply circuit, and the second pressure gauge can detect the oil pressure of the rod chamber oil supply circuit.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The utility model provides a hydraulic system in which a P port of a first electromagnetic reversing valve is connected and communicated with an oil inlet oil circuit, a B port of the first electromagnetic reversing valve is communicated with a master cylinder rod chamber, a P port of a second electromagnetic reversing valve is communicated with a master cylinder plug chamber, a B port of the second electromagnetic reversing valve is communicated with an oil inlet port of a first check valve, and an oil outlet port of the first check valve is communicated with a master cylinder rod chamber; when the first electromagnet of the first electromagnetic reversing valve is energized, the P port of the first electromagnetic reversing valve is communicated with the B port of the first electromagnetic reversing valve, when the first electromagnet of the first electromagnetic reversing valve is energized, the first electromagnet of the second electromagnetic reversing valve is energized, and when the first electromagnet of the second electromagnetic reversing valve is energized, the P port of the second electromagnetic reversing valve is communicated with the B port of the second electromagnetic reversing valve, the purpose of improving efficiency and speed is achieved without increasing energy consumption, the utility model has a simple structure, clear actions, clear principles, high reliability, wide application range, obvious effects, flexible design, good controllability, extremely low cost, convenient maintenance, higher working efficiency, and can promote ultra-high pressure technology in this field, bringing considerable economic benefits and stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1A structural schematic diagram of the hydraulic system provided by the utility model;

[0016] In the figure: 1-first solenoid reversing valve, 2-second solenoid reversing valve, 3-oil inlet circuit, 4-first pressure gauge, 5-first overflow valve, 6-first check valve, 7-second check valve, 8-rod chamber oil supply circuit, 9-second pressure gauge. DETAILED DESCRIPTION

[0017] 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.

[0018] The purpose of the utility model is to provide a hydraulic system to solve the problems existing in the above-mentioned prior art, which can increase the forward speed of the master cylinder, prolong the service life, ensure the stability of the system, have high reliability, high efficiency, good energy-saving effect and low cost.

[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, the utility model provides a hydraulic system, including a first solenoid reversing valve 1, a second solenoid reversing valve 2 and a first non-return valve 6, wherein the P port of the first solenoid reversing valve 1 is connected and communicated with the oil inlet circuit 3, the B port of the first solenoid reversing valve 1 is communicated with the master cylinder rod chamber, the P port of the second solenoid reversing valve 2 is communicated with the master cylinder plug chamber, the B port of the second solenoid reversing valve 2 is communicated with the oil inlet port of the first non-return valve 6, and the oil outlet port of the first non-return valve 6 is communicated with the master cylinder rod chamber; when the first solenoid of the first solenoid reversing valve 1 is energized, the P port of the first solenoid reversing valve 1 is communicated with the B port of the first solenoid reversing valve 1, when the first solenoid of the first solenoid reversing valve 1 is energized, the first solenoid of the second solenoid reversing valve 2 is energized, and when the first solenoid of the second solenoid reversing valve 2 is energized, the P port of the second solenoid reversing valve 2 is communicated with the B port of the second solenoid reversing valve 2.

[0021] The utility model provides a hydraulic system in which the P port of the first electromagnetic reversing valve 1 is connected and communicated with the oil inlet oil circuit 3, the B port of the first electromagnetic reversing valve 1 is communicated with the master cylinder rod chamber, the P port of the second electromagnetic reversing valve 2 is communicated with the master cylinder plug chamber, the B port of the second electromagnetic reversing valve 2 is communicated with the oil inlet port of the first check valve 6, and the oil outlet port of the first check valve 6 is communicated with the master cylinder rod chamber; the first electromagnet of the first electromagnetic reversing valve 1 is energized to enable the P port of the first electromagnetic reversing valve 1 to be communicated with the B port of the first electromagnetic reversing valve 1, and the first electromagnet of the first electromagnetic reversing valve 1 is energized to enable the P port of the first electromagnetic reversing valve 1 to be communicated with the B port of the first electromagnetic reversing valve 1. When the magnet is energized, the first electromagnet of the second electromagnetic reversing valve 2 is energized. The energization of the first electromagnet of the second electromagnetic reversing valve 2 can connect the P port of the second electromagnetic reversing valve 2 with the B port of the second electromagnetic reversing valve 2, thereby achieving the purpose of improving efficiency and speed without increasing energy consumption. The structure is simple, the action is clear, the principle is clear, the reliability is high, the application range is wide, the effect is obvious, the design is flexible, the controllability is good, the cost is extremely low, the maintenance is convenient, the work efficiency is higher, and it can promote the ultra-high pressure technology in this field, bring considerable economic benefits, and have stronger adaptability.

[0022] Furthermore, the T port of the first electromagnetic reversing valve 1 is connected to the oil pool.

[0023] Furthermore, the A port of the first solenoid reversing valve 1 is connected with the A port of the second solenoid reversing valve 2. When the second electromagnet of the first solenoid reversing valve 1 is energized, the P port of the first solenoid reversing valve 1 is connected with the A port of the first solenoid reversing valve 1. When the second electromagnet of the first solenoid reversing valve 1 is energized, the first electromagnet of the second solenoid reversing valve 2 is de-energized. When the first electromagnet of the second solenoid reversing valve 2 is de-energized, the P port of the second solenoid reversing valve 2 is connected with the A port of the second solenoid reversing valve 2.

[0024] Furthermore, a first pressure gauge 4 and a first overflow valve 5 are provided on the oil inlet circuit 3 . The first pressure gauge 4 can detect the oil pressure of the oil inlet circuit 3 , and the overflow port of the first overflow valve 5 is connected to the oil pool.

[0025] Furthermore, a second one-way valve 7 is provided between the B port of the first electromagnetic reversing valve 1 and the master cylinder rod chamber, the oil inlet of the second one-way valve 7 is connected to the B port of the first electromagnetic reversing valve 1, and the oil outlet of the second one-way valve 7 is connected to the master cylinder rod chamber.

[0026] Furthermore, a rod chamber oil supply circuit 8 is provided between the oil outlet of the second one-way valve 7 and the master cylinder rod chamber, the first end of the rod chamber oil supply circuit 8 is connected to the master cylinder rod chamber, the second end of the rod chamber oil supply circuit 8 is connected to the oil outlet of the second one-way valve 7, and the second end of the rod chamber oil supply circuit 8 is connected to the oil outlet of the first one-way valve 6.

[0027] Furthermore, a second pressure gauge 9 is provided on the rod chamber oil supply passage 8 , and the second pressure gauge 9 can detect the oil pressure of the rod chamber oil supply passage 8 .

[0028] As a more preferred implementation of this embodiment, the first solenoid reversing valve 1 adopts a G-type three-position four-way solenoid reversing valve, the second solenoid reversing valve 2 adopts an A-type two-position three-way solenoid reversing valve, and the first check valve 6 and the second check valve 7 both adopt stacked check valves.

[0029] The hydraulic system provided by the utility model has the following working modes: no-load starting, rapid descent of the master cylinder, slow pressurization of the master cylinder and return of the master cylinder:

[0030] No-load starting: The hydraulic oil reaches the P port of the first solenoid reversing valve 1 from the oil inlet line 3, and then directly returns to the oil pool through the T port of the first solenoid reversing valve 1 to achieve no-load starting.

[0031] The master cylinder moves downward quickly: the hydraulic oil reaches the P port of the first solenoid reversing valve 1 from the oil inlet circuit 3, the first overflow valve 5 sets the pressure to maintain the pressure at the oil inlet position of the P port of the first solenoid reversing valve 1, the first pressure gauge 4 monitors the oil pressure change of the oil inlet circuit 3 at any time, the first solenoid of the first solenoid reversing valve 1 is energized, the first solenoid reversing valve 1 is in the cross position PB, the oil passes through the first solenoid reversing valve 1 and enters the second one-way valve 7, the second one-way valve 7 is opened, the oil enters the master cylinder rod chamber, the second pressure gauge 9 monitors the pressure change of the master cylinder rod chamber position in real time, the first solenoid of the second solenoid reversing valve 2 is energized, the second solenoid reversing valve 2 is in PB, the oil enters the first one-way valve 6 from the master cylinder plug chamber through the PB channel of the second solenoid reversing valve 2, and reaches the master cylinder rod chamber, completing the differential action and realizing the rapid downward movement of the master cylinder.

[0032] The master cylinder slowly descends: the hydraulic oil reaches the P port of the first solenoid reversing valve 1 from the oil inlet circuit 3, the first relief valve 5 sets the pressure to maintain the pressure at the oil inlet position of the P port of the first solenoid reversing valve 1, the first pressure gauge 4 monitors the oil pressure change of the oil inlet circuit 3 at any time, the first solenoid of the first solenoid reversing valve 1 is energized, the first solenoid reversing valve 1 is in the cross position PB, the oil passes through the first solenoid reversing valve 1 and enters the second one-way valve 7, the second one-way valve 7 is opened, the oil enters the master cylinder rod chamber, the second pressure gauge 9 monitors the pressure change of the master cylinder rod chamber position in real time, and the master cylinder slowly descends.

[0033] Master cylinder return stroke: the hydraulic oil reaches the P port of the first solenoid reversing valve 1 from the oil inlet circuit 3, the first relief valve 5 sets the pressure to maintain the pressure at the oil inlet position of the P port of the first solenoid reversing valve 1, the first pressure gauge 4 monitors the oil pressure change of the oil inlet circuit 3 at any time, the second solenoid of the first solenoid reversing valve 1 is energized, the first solenoid reversing valve 1 is in the parallel position PA, the first solenoid of the second solenoid reversing valve 2 is de-energized, the oil enters the master cylinder plug cavity through the PA channel of the second solenoid reversing valve 2, and the master cylinder return stroke is completed.

[0034] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hydraulic system, characterized in that: It includes a first solenoid reversing valve, a second solenoid reversing valve and a first non-return valve, wherein the P port of the first solenoid reversing valve is connected and communicated with the oil inlet circuit, the B port of the first solenoid reversing valve is communicated with the master cylinder rod chamber, the P port of the second solenoid reversing valve is communicated with the master cylinder plug chamber, the B port of the second solenoid reversing valve is communicated with the oil inlet port of the first non-return valve, and the oil outlet port of the first non-return valve is communicated with the master cylinder rod chamber; when the first electromagnet of the first solenoid reversing valve is energized, the P port of the first solenoid reversing valve is communicated with the B port of the first solenoid reversing valve, when the first electromagnet of the first solenoid reversing valve is energized, the first electromagnet of the second solenoid reversing valve is energized, and when the first electromagnet of the second solenoid reversing valve is energized, the P port of the second solenoid reversing valve is communicated with the B port of the second solenoid reversing valve.

2. The hydraulic system according to claim 1, characterized in that: The T port of the first electromagnetic reversing valve is communicated with the oil pool.

3. The hydraulic system according to claim 2, characterized in that: The A port of the first solenoid reversing valve is connected with the A port of the second solenoid reversing valve. When the second electromagnet of the first solenoid reversing valve is energized, the P port of the first solenoid reversing valve can be connected with the A port of the first solenoid reversing valve. When the second electromagnet of the first solenoid reversing valve is energized, the first electromagnet of the second solenoid reversing valve is de-energized. When the first electromagnet of the second solenoid reversing valve is de-energized, the P port of the second solenoid reversing valve can be connected with the A port of the second solenoid reversing valve.

4. The hydraulic system according to claim 2, characterized in that: The oil inlet line is provided with a first pressure gauge and a first overflow valve, the first pressure gauge can detect the oil pressure of the oil inlet line, and the overflow port of the first overflow valve is connected to the oil pool.

5. The hydraulic system according to claim 2, characterized in that: A second one-way valve is provided between the B port of the first electromagnetic reversing valve and the master cylinder rod chamber, the oil inlet of the second one-way valve is connected to the B port of the first electromagnetic reversing valve, and the oil outlet of the second one-way valve is connected to the master cylinder rod chamber.

6. The hydraulic system according to claim 5, characterized in that: A rod chamber oil supply circuit is provided between the oil outlet of the second one-way valve and the master cylinder rod chamber, the first end of the rod chamber oil supply circuit is connected to the master cylinder rod chamber, the second end of the rod chamber oil supply circuit is connected to the oil outlet of the second one-way valve, and the second end of the rod chamber oil supply circuit is connected to the oil outlet of the first one-way valve.

7. The hydraulic system according to claim 6, characterized in that: The rod chamber oil supply oil passage is provided with a second pressure gauge, and the second pressure gauge can detect the oil pressure of the rod chamber oil supply oil passage.

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