CN205331072U - Extruder hydraulic means - Google Patents

Abstract

The utility model relates to a hydraulic device for an extrusion machine, which comprises an oil tank, the oil tank is connected to the input port of an oil pump through an oil inlet pipeline, the output port of the oil pump is connected to the first port of an electromagnetic reversing valve through a first pipeline, and the first pipeline is provided with a The first one-way valve, the first pipeline communicates with the accumulator and the pressure relay respectively, the second port of the electromagnetic reversing valve communicates with the lower chamber of the booster cylinder, and the third port of the electromagnetic reversing valve communicates with the upper chamber of the supercharger respectively. chamber and the input end of the external control sequence valve, the output end of the external control sequence valve is connected with the boost port of the booster cylinder, the fourth port of the electromagnetic reversing valve is connected with the oil tank through the second pipeline, and the second pipeline is equipped with a second one-way valve. By setting the accumulator, when the demand pressure of the booster cylinder in the extruder is insufficient, it can be used as an additional hydraulic pressure to ensure the hydraulic pressure demand of the extruder; when the oil pump suddenly supplies oil and the oil pressure in the pipeline increases instantaneously , the accumulator can absorb this part of the energy to ensure the normal pressure of the entire system.

Description

A hydraulic device for an extrusion press

technical field

The utility model relates to the technical field of hydraulic equipment, in particular to a hydraulic device for an extrusion machine.

Background technique

At present, the actions of many extruders are controlled by the hydraulic system and the electrical system to complete various process cycle actions of the extruder. Its working principle is to use special hydraulic oil as the working medium, and the oil pump as the power source, relying on the force of the oil pump to make the hydraulic oil enter the main oil cylinder through the hydraulic pipeline system, and use the pressure of the liquid to push the piston to move. The hydraulic system of the extruder under the existing technology, the longer the pressing stroke per second (that is, to achieve rapid pressing), the greater the power of the motor is required, and it is difficult to meet the requirements of fast speed and low power that we generally hope. In terms of energy saving Pressing 30-100 mm per second is often not achieved, resulting in insufficient pressure during the extrusion process.

Utility model content

The technical problem to be solved by the utility model is to provide an extruder hydraulic device which has a simple structure and can provide sufficient pressure for the extruder.

The technical scheme of the utility model for solving the above-mentioned technical problems is as follows: a hydraulic device for an extruder, including an oil tank, the oil tank is connected to the input port of the oil pump through the oil inlet pipeline, and the output port of the oil pump is connected to the electromagnetic reversing valve through the first pipeline The first port of the valve, the first pipeline is provided with a first one-way valve, and the first pipeline between the first one-way valve and the electromagnetic reversing valve communicates with the accumulator and the pressure relay respectively , the second port of the electromagnetic reversing valve communicates with the lower chamber of the booster cylinder, and the third port of the electromagnetic reversing valve communicates with the upper chamber of the supercharger and the input end of the external control sequence valve respectively, so The output end of the externally controlled sequence valve communicates with the pressurization interface of the booster cylinder, the fourth port of the electromagnetic reversing valve communicates with the fuel tank through the second pipeline, and the second pipeline is provided with a second unit to the valve.

The beneficial effects of the utility model are: the utility model adopts a pressurized cylinder, which can increase the pressure in the extrusion process, and by setting the accumulator, the oil is stored and converted into the compression energy of the accumulator under normal circumstances. When the demand pressure of the pressurized cylinder in the extruder is insufficient, it can be used as additional hydraulic pressure to ensure the hydraulic pressure demand of the extruder; when the oil pump suddenly supplies oil and the oil pressure in the pipeline increases instantaneously, the accumulator can absorb This part of the energy to ensure the normal pressure of the entire system.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the first pipeline communicates with the second pipeline through an overflow pipeline, and an electromagnetic overflow valve is provided on the overflow pipeline.

The beneficial effect of adopting the above further solution is: the first pipeline and the second pipeline are connected through the overflow valve, and when the oil pressure in the first pipeline is too high, part of the oil can be transferred to the second pipeline through the overflow valve to ensure that the first The oil pressure of a pipeline is normal.

Further, the accumulator is a piston accumulator, one end of the piston accumulator communicates with the first pipeline, and the other end of the piston accumulator communicates with the high-pressure gas tank through the intake pipeline, An intake flow control valve is provided on the intake pipe.

The beneficial effect of adopting the above further scheme is: the accumulator adopts a piston type accumulator, and one end of the accumulator is connected to a high-pressure gas tank through a pipeline, which can convert the air pressure into the hydraulic pressure in the pipeline system, further ensuring the hydraulic pressure of the booster cylinder .

Further, an oil filter is provided on the oil inlet pipeline.

The beneficial effect of adopting the above further solution is: the arrangement of the oil filter can prevent the impurities in the oil tank from entering the pressurized pipeline and causing damage to the device.

Further, the fuel tank is provided with a balanced air pressure opening, and an air filter is provided at the balanced air pressure opening.

The beneficial effect of adopting the above further solution is that the arrangement of the balance air pressure opening can ensure the air pressure balance in the fuel tank.

Further, the oil tank is provided with a liquid level gauge for observing the liquid level in the oil tank.

The beneficial effect of adopting the above further solution is that the setting of the liquid level gauge is convenient for the staff to know the amount of oil in the oil tank.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Oil tank, 2. Oil inlet pipe, 3. Oil pump, 4. First pipe, 5. Electromagnetic reversing valve, 5-1, First port, 5-2, Second port, 5-3, Third port , 5-4, the fourth port, 6, the first one-way valve, 7, the accumulator, 8, the pressure relay, 9, the booster cylinder, 10, the external control sequence valve, 11, the second pipeline, 12, the first Two one-way valves, 13, overflow pipeline, 14, electromagnetic overflow valve, 15, intake pipeline, 16, high-pressure gas tank, 17, intake flow control valve, 18, oil filter, 19, balance air pressure opening, 20. Air filter, 21. Liquid level gauge.

detailed description

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1, the utility model comprises an oil tank 1, the oil tank 1 is connected to the input port of the oil pump 3 through the oil inlet pipeline 2, and the output port of the oil pump 3 is connected to the first electromagnetic reversing valve 5 through the first pipeline 4. Port 5-1, the first pipeline 4 is provided with a first one-way valve 6, and the first pipeline 4 between the first one-way valve 6 and the electromagnetic reversing valve 5 is respectively connected to the energy storage device 7 and pressure relay 8, the second port 5-2 of the electromagnetic reversing valve 5 communicates with the lower cavity of the booster cylinder 9, and the third port 5-3 of the electromagnetic reversing valve 5 communicates with the booster cylinder 9 respectively. The upper chamber of the pressurizer and the input end of the external control sequence valve 10, the output end of the external control sequence valve 10 communicates with the boost port of the booster cylinder, the fourth port 5- 4 communicate with the oil tank 1 through a second pipeline 11, and a second one-way valve 12 is provided on the second pipeline 11. The first pipeline 4 communicates with the second pipeline 11 through an overflow pipeline 13 , and an electromagnetic overflow valve 14 is provided on the overflow pipeline 13 . The accumulator 7 is a piston accumulator 7, one end of the piston accumulator 7 communicates with the first pipeline 4, and the other end of the piston accumulator 7 communicates with the intake pipeline 15 A high-pressure gas tank 16, and an intake air flow control valve 17 is arranged on the air intake pipe 15 . An oil filter 18 is arranged on the oil inlet pipe 2 . The fuel tank 1 is provided with a balanced air pressure opening 19, and an air filter 20 is provided at the balanced air pressure opening 19. The oil tank 1 is provided with a liquid level gauge 21 for observing the liquid level in the oil tank 1 .

The utility model adopts the pressurized cylinder 9, which can increase the pressure in the extrusion process, and by setting the accumulator 7, in general, the oil is stored and converted into the compression energy of the accumulator. When the pressure required by the booster cylinder 9 is insufficient, it can be used as additional hydraulic pressure to ensure the hydraulic pressure demand of the extruder; when the oil pump 3 supplies oil suddenly and the oil pressure in the pipeline increases instantaneously, the accumulator 7 can absorb this part Energy to ensure the normal pressure of the entire system. The first pipeline 4 and the second pipeline 11 are communicated through the overflow valve. When the oil pressure in the first pipeline 4 is too high, part of the oil can be sent to the second pipeline 11 through the overflow valve to ensure that the oil in the first pipeline 4 Normal pressure. The accumulator 7 adopts a piston type accumulator 7, and one end of the accumulator 7 is connected to the high-pressure gas tank 16 through a pipeline, so that the air pressure can be converted into the hydraulic pressure in the pipeline system to further ensure the hydraulic pressure of the booster cylinder 9. The arrangement of the oil filter 18 can prevent impurities in the oil tank 1 from entering the pressurized pipeline and causing damage to the device. The setting of the balance air pressure opening 19 can ensure the air pressure balance in the fuel tank 1 . The setting of the liquid level gauge 21 is convenient for the staff to understand the oil quantity in the fuel tank 1.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. An extruder hydraulic device is characterized in that it comprises an oil tank (1), the oil tank (1) is connected to the input port of the oil pump (3) through the oil inlet pipeline (2), and the output of the oil pump (3) The port is connected to the first port (5-1) of the electromagnetic reversing valve (5) through the first pipeline (4), and the first one-way valve (6) is arranged on the first pipeline (4). The first pipeline (4) between the one-way valve (6) and the electromagnetic reversing valve (5) communicates with the accumulator (7) and the pressure relay (8) respectively, and the electromagnetic reversing valve (5 ) of the second port (5-2) is communicated with the lower chamber of the booster cylinder (9), and the third port (5-3) of the electromagnetic reversing valve (5) is respectively communicated with the booster cylinder (9) The upper chamber of the upper chamber and the input end of the external control sequence valve (10), the output end of the external control sequence valve (10) communicates with the boost port of the booster cylinder (9), and the electromagnetic reversing valve (5 ) of the fourth port (5-4) communicates with the oil tank (1) through the second pipeline (11), and the second pipeline (11) is provided with a second one-way valve (12). 2. A hydraulic device for an extruder according to claim 1, characterized in that, the first pipeline (4) communicates with the second pipeline (11) through an overflow pipeline (13), so The overflow pipe (13) is provided with an electromagnetic overflow valve (14). 3. A hydraulic device for an extruder according to claim 1 or 2, characterized in that the accumulator (7) is a piston accumulator (7), and the piston accumulator (7 ) communicates with the first pipeline (4), and the other end of the piston accumulator (7) communicates with the high-pressure gas tank (16) through the air intake pipeline (15), and the air intake pipeline (15) There is an intake flow control valve (17) on it. 4. The extruder hydraulic device according to claim 1 or 2, characterized in that an oil filter (18) is provided on the oil inlet pipe (2). 5. A hydraulic device for an extruder according to claim 1 or 2, characterized in that, the oil tank (1) is provided with a balance air pressure opening (19), and the balance air pressure opening (19) is provided with Air filter (20). 6. A hydraulic device for an extruder according to claim 1 or 2, characterized in that the oil tank (1) is provided with a liquid level gauge (21) for observing the liquid level in the oil tank (1) ).