Double-loop hydraulic device for press machine

Abstract

The utility model relates to a double-loop hydraulic device for a press machine, which belongs to the technical field of press machine protection and is characterized in that an unloading valve is connected with an oil tank through a valve plate, and a hydraulic cushion I and a hydraulic cushion II are respectively connected with a pneumatic pump I and a pneumatic pump II through a rubber pipe I and a rubber pipe II; the other end of the first pneumatic pump and the other end of the second pneumatic pump are communicated with an oil tank through a valve plate, and the first hydraulic cushion and the second hydraulic cushion are provided with a first pressure gauge and a second pressure gauge respectively, and the first pressure gauge and the second pressure gauge are used for displaying pressure. And the pressure gauge displays the pressure of each hydraulic cushion in real time and shares one electromagnetic unloading valve. Due to the fact that the pressure gauge is installed, which hydraulic cushion is overloaded can be judged in time, the two hydraulic cushions share one unloading valve, electric signals are interlocked, after one hydraulic cushion is overloaded and unloaded, the other hydraulic cushion is unloaded subsequently, and the two connecting rod pitch tooth assemblies of the press machine are protected against damage at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of press protection, and specifically refers to a double-circuit hydraulic device for a press. Background Art

[0002] At present, the hydraulic overload devices used on double-point presses are generally single-circuit hydraulic overload devices. From the oil outlet of the hydraulic overload pneumatic pump, hoses connected through a tee joint supply oil to each oil cylinder, and compressed air controls the entry of the hydraulic oil of the hydraulic cushion through an electromagnetic directional valve. When the punching machine is working, by pressing the electrical signal of the electromagnetic directional valve, compressed air enters the pneumatic pump through the electromagnetic directional valve, thereby pushing the hydraulic piston in the pneumatic pump to open and close. When the compressed air enters, the oil suction hole of the hydraulic piston opens to suck oil from the oil tank and enters the hydraulic cushion through the hose, so as to ensure the required oil pressure of the hydraulic cushion. The disadvantages are that when the press is working, it is impossible to determine which of the two hydraulic cushions is overloaded, and the real-time pressure of the hydraulic cushion cannot be displayed. In addition, most of the single-circuit hydraulic overload pumps installed on the inner side wall of the machine body are unloaded through a manual unloading valve after overload. Content of the Utility Model

[0003] The utility model aims to solve the above technical problems and provides a double-circuit hydraulic device for a press.

[0004] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0005] A double-circuit hydraulic device for a press, including an oil tank, a valve plate, an unloading valve, a first hydraulic cushion, and a second hydraulic cushion. The unloading valve is connected to the oil tank through the valve plate;

[0006] The first hydraulic cushion and the second hydraulic cushion are respectively connected to a first pneumatic pump and a second pneumatic pump through a first hose and a second hose;

[0007] The other ends of the first pneumatic pump and the second pneumatic pump communicate with the oil tank through the valve plate;

[0008] A first pressure gauge and a second pressure gauge for displaying pressure are respectively installed on the first hydraulic cushion and the second hydraulic cushion.

[0009] Preferably, the valve plate is fixed on the oil tank through a first screw.

[0010] Preferably, the first pneumatic pump and the second pneumatic pump are fixed on the valve plate through a second screw and a third screw.

[0011] Preferably, the first pneumatic pump is fixed on the valve plate through a second screw.

[0012] Preferably, the second pneumatic pump is fixed on the valve plate through a third screw

[0013] Preferably, the unloading valve is fixed on the valve plate through a fourth screw.

[0014] Preferably, the valve plate is provided with a pneumatic pump oil suction hole and a pneumatic pump oil suction and return hole for cooperating with the first pneumatic pump and the second pneumatic pump.

[0015] Preferably, the valve plate is provided with a unloading valve mounting hole and a unloading valve oil return hole for cooperating with the unloading valve.

[0016] Preferably, the first pneumatic pump and the second pneumatic pump are connected to external compressed air through an air pipe, and an electromagnetic directional control valve for controlling the first pneumatic pump and the second pneumatic pump is installed on the air pipe.

[0017] After adopting the above structure, the utility model has the following advantages:

[0018] The utility model adopts a hydraulic overload double-loop device, controls the first hydraulic pad and the second hydraulic pad through double pumps, and has a pressure gauge to display the pressure of each hydraulic pad in real time, and shares an electromagnetic unloading valve. Since a pressure gauge is installed, it can be judged in time which hydraulic pad is overloaded, and the two hydraulic pads share an unloading valve, and the electric signals are interlocked. After one hydraulic pad is overloaded and unloaded, the other is unloaded subsequently, protecting the two connecting rod distance tooth components of the press from being damaged at the same time.

[0019] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is the front view of the utility model;

[0022] Figure 2 is the connection schematic diagram of the utility model.

[0023] As shown in the figure: 1, fuel tank; 2, valve plate; 3, screw one; 4, electromagnetic directional control valve; 5, first hydraulic pad; 6, pressure gauge one; 7, rubber hose one; 8, screw two; 9, first pneumatic pump; 10, unloading valve; 11, screw four; 12, screw three; 13, second pneumatic pump; 14, rubber hose two; 15, second hydraulic pad; 16, pressure gauge two. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0025] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0026] The following further elaborates on the present utility model in conjunction with the full text.

[0027] Combined with the attached Figure 1 and Figure 2 , a dual-circuit hydraulic device for a press, including an oil tank 1, a valve plate 2, a relief valve 10, a hydraulic pad one 5, and a hydraulic pad two 15. The relief valve 10 is connected to the oil tank 1 through the valve plate 2; the hydraulic pad one 5 and the hydraulic pad two 15 are respectively connected to a pneumatic pump one 9 and a pneumatic pump two 13 through a hose one 7 and a hose two 14; on the one hand, the pneumatic pump one 9 and the pneumatic pump two 13 are connected to the oil tank 1 through the valve plate 2; on the other hand, they are respectively connected to the hydraulic pad one 5 and the hydraulic pad two 15 through the hose one 7 and the hose two 14.

[0028] When the present utility model is specifically implemented, as Figure 2 shown. A pressure gauge one 6 for displaying pressure and a pressure gauge two 16 are respectively installed on the hydraulic pad one 5 and the hydraulic pad two 15. A pressure gauge one 6 and a pressure gauge two 16 for real-time displaying pressure are respectively installed on the hydraulic pad one 5 and the hydraulic pad two 15. Once the pressure gauge one 6 and the pressure gauge two 16 exceed the set pressure value, the electrical signal of the relief valve 10 is immediately transmitted to the main control cabinet, and the hydraulic pad one 5 and the hydraulic pad two 15 are immediately depressurized. The oil of the hydraulic pad one 5 and the hydraulic pad two 15 returns to the oil tank 1 through the relief valve 10;

[0029] The valve plate 2 is fixed on the oil tank 1 by a screw one 3, the pneumatic pump one 9 and the pneumatic pump two 13 are fixed on the valve plate 2 by a screw two 8 and a screw three 12, and the relief valve 10 is fixed on the valve plate 2 by a screw four 11. Specifically, the valve plate 2 is fixed on the upper part of the oil tank 1 by a screw one 3, the pneumatic pump one 9 and the pneumatic pump two 13 are fixed on the valve plate 2 by a screw two 8 and a screw three 12, and the relief valve 10 is fixed on the valve plate by a screw four 11;

[0030] The other ends of the first pneumatic pump 9 and the second pneumatic pump 13 are connected to the fuel tank 1 through the valve plate 2;

[0031] The valve plate 2 is provided with a suction oil hole for the pneumatic pump, a suction and return oil hole for the pneumatic pump, an installation hole for the unloading valve, and a return oil hole for the unloading valve.

[0032] The first pneumatic pump 9 and the second pneumatic pump 13 are connected to external compressed air through air pipes, and an electromagnetic directional valve 4 for controlling the first pneumatic pump 9 and the second pneumatic pump 13 is installed on the air pipes. The first pneumatic pump 9 and the second pneumatic pump 13 are used to control the hydraulic oil to enter the first hydraulic pad 5 and the second hydraulic pad 15 from the fuel tank 1 through the first rubber hose 7 and the second rubber hose 14. The compressed air controls the entry of the gas through the electromagnetic directional valve 4 to ensure the entry and return of the hydraulic oil from the fuel tank 1 to the hydraulic pads. The electromagnetic directional valve 4 is controlled by the electrical signal of the main control cabinet.

[0033] Embodiment 1:

[0034] When the punching machine is working, the electrical signal of the electromagnetic directional valve 4 is turned on, and the compressed air enters the first pneumatic pump 9 and the second pneumatic pump 13 through the electromagnetic directional valve 4, thereby driving the hydraulic pistons in the pneumatic pumps to open and close. When the compressed air enters, the suction oil holes of the hydraulic pistons open to suck oil from the fuel tank 1 and enter the first hydraulic pad 5 and the second hydraulic pad 15 through the first rubber hose 7 and the second rubber hose 14 connected to the pneumatic pump, so as to ensure the required oil pressure of the hydraulic pads. The oil pressure of the hydraulic pads is displayed by the first pressure gauge 6 and the second pressure gauge 16. The fuel tank 1 ensures the oil demand of the two first hydraulic pads 5 and the second hydraulic pads 15.

[0035] Embodiment 2:

[0036] When the punching machine is working, the two pumps share an electromagnetic unloading valve 10. When one of the first hydraulic pad 5 or the second hydraulic pad 15 is overloaded, the unloading valve 10 sends out an electrical signal, and the oil pressure of the hydraulic pad is unloaded. Since the electrical signals of the two hydraulic pads are interlocked, the other hydraulic pad is unloaded subsequently, so as to protect the two connecting rod distance tooth components of the press from being damaged at the same time.

[0037] The above describes the present invention and its embodiments. This description is not restrictive. What is shown throughout the text is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design a structural manner and an embodiment similar to the technical solution without creative work without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A dual-circuit hydraulic device for a press machine, comprising an oil tank (1), a valve plate (2), an unloading valve (10), a hydraulic pad 1 (5), and a hydraulic pad 2 (15), characterized in that: The unloading valve (10) is connected to the oil tank (1) via a valve plate (2); The hydraulic pad 1 (5) and the hydraulic pad 2 (15) are connected to the pneumatic pump 1 (9) and the pneumatic pump 2 (13) respectively through the rubber hose 1 (7) and the rubber hose 2 (14); The other ends of the pneumatic pump 1 (9) and the pneumatic pump 2 (13) are connected to the oil tank (1) via a valve plate (2); The hydraulic cushion 1 (5) and the hydraulic cushion 2 (15) are respectively provided with a pressure gauge 1 (6) and a pressure gauge 2 (16) for displaying pressure.

2. A dual-circuit hydraulic device for a press according to claim 1, characterized in that: The valve plate (2) is fixed to the oil tank (1) by means of screws (3).

3. A dual-circuit hydraulic device for a press according to claim 1, characterized in that: The pneumatic pump 1 (9) is fixed on the valve plate (2) by means of screw 2 (8).

4. A dual-circuit hydraulic device for a press according to claim 1, characterized in that: The pneumatic pump 2 (13) is fixed on the valve plate (2) by means of screw 3 (12).

5. The dual-circuit hydraulic device for a press according to claim 1, characterized in that: The unloading valve (10) is fixed on the valve plate (2) by means of screws four (11).

6. A dual-circuit hydraulic device for a press according to claim 1, characterized in that: The valve plate (2) is provided with a pneumatic pump oil suction hole and a pneumatic pump oil return hole for use with pneumatic pump one (9) and pneumatic pump two (13).

7. The dual-circuit hydraulic device for a press according to claim 1, characterized in that: The valve plate (2) is provided with an unloading valve installation hole and an unloading valve oil return hole used in conjunction with the unloading valve (10).

8. The dual-circuit hydraulic device for a press machine according to claim 1, characterized in that: The pneumatic pump 1 (9) and the pneumatic pump 2 (13) are connected to external compressed air via an air pipe, and an electromagnetic reversing valve (4) for controlling the pneumatic pump 1 (9) and the pneumatic pump 2 (13) is installed on the air pipe.

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