CN217502135U

CN217502135U - Hydraulic pressure station economizer

Info

Publication number: CN217502135U
Application number: CN202221671623.8U
Authority: CN
Inventors: 陈忠年; 谭贝; 吴静仁; 张海东; 周立金
Original assignee: Zenith Steel Group Co Ltd; Changzhou Zenith Special Steel Co Ltd
Current assignee: Zenith Steel Group Co Ltd; Changzhou Zenith Special Steel Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-09-27
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a hydraulic pressure station economizer has the oil tank, plunger pump and pneumatic cylinder, the plunger pump accesss to and is equipped with M type switching-over valve on the oil circuit of pneumatic cylinder, the oil inlet pipe of M type switching-over valve is equipped with first check valve, be equipped with the third check valve on the time oil pipe way of M type switching-over valve, be equipped with the cooler on the pipeline between third check valve and the oil tank in proper order, return oil filter, tube coupling and be provided with overflow valve and second check valve between first check valve entrance point and the third check valve exit end. The overflow valve is arranged between the pipelines at the oil inlet end and the oil return end of the M-shaped reversing valve, so that the redundant pressure and flow of the plunger pump are cooled by the overflow valve through the cooler and then return to the oil tank; meanwhile, when the hydraulic cylinder does not act, the plunger pump is in a pressure maintaining state, the M-shaped reversing valve is in a middle position, pressure oil can flow back through the overflow valve and enter the cooler to be cooled and then return to the oil tank, and therefore the purpose of saving energy consumption when cooling hydraulic oil is achieved.

Description

Hydraulic pressure station economizer

Technical Field

The utility model belongs to the technical field of energy-conserving technique and specifically relates to a hydraulic pressure station economizer.

Background

The hydraulic station is an important component of steel rolling equipment, the main function of the hydraulic station is to provide a required pressure oil source for a mechanical execution element, in the continuous action process of the hydraulic execution element, an oil pump continuously outputs power, the oil temperature of the hydraulic station can be gradually increased, and in addition, because the working environment of a hydraulic system of a rolling mill is greatly influenced by ambient temperature, the oil is rapidly aged and deteriorated and the viscosity of the oil is reduced due to overhigh hydraulic oil temperature, so that a series of problems are caused to the hydraulic system.

The traditional hydraulic station adopts a screw pump which is normally opened for 24 hours, oil products returned by a hydraulic system of a rolling mill are continuously cooled circularly by a cooler, and the 24-hour normally opened mode of the screw pump inevitably causes the increase of the consumption of electric energy; secondly, a reversing valve adopted on a pipeline leading to the oil cylinder is a Y-shaped reversing valve, and oil cannot return to a cooler for cooling in a middle position; in addition, the oil temperature is controlled by manually controlling the opening degree of a ball valve in the conventional hydraulic station, and water and labor are wasted.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: in order to overcome the defects in the prior art, the utility model provides a hydraulic station energy-saving device which can effectively reduce the power consumption and save the production cost.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a hydraulic pressure station economizer, has oil tank, plunger pump and pneumatic cylinder, the hydraulic cylinder is gone into with the hydraulic oil pump of oil tank to the plunger pump, the oil circuit that the plunger pump accesss to the pneumatic cylinder on be equipped with M type switching-over valve, the oil inlet pipeline of M type switching-over valve is equipped with first check valve, is equipped with the third check valve on the time oil pipe way of M type switching-over valve, is equipped with cooler, oil return filter on the pipeline between third check valve and the oil tank in proper order, between first check valve entrance point and the third check valve exit end tube coupling and be provided with overflow valve and second check valve, the overflow pressure of overflow valve is less than plunger pump outlet pressure ten kilograms.

Preferably, the plunger pumps are connected in parallel, and a throttle valve is arranged on a pipeline between the M-shaped reversing valve and the hydraulic cylinder.

In order to realize the automatic control of the oil temperature in the oil tank, a pipeline of a water inlet of the cooler is provided with an on-off valve, the oil tank is provided with a temperature sensor for measuring the oil temperature, and the temperature sensor controls the opening of a valve core of the on-off valve after comparing a detected temperature signal with a temperature setting value.

The utility model has the advantages that: the utility model is provided with the M-shaped reversing valve, and the overflow valve is arranged between the pipelines at the oil inlet end and the oil return end of the M-shaped reversing valve, so that the redundant pressure and flow of the plunger pump are cooled by the overflow valve through the cooler and then returned to the oil tank; meanwhile, when the hydraulic cylinder does not act, the plunger pump is in a pressure maintaining state, the M-shaped reversing valve is in a middle position, pressure oil can flow back through the overflow valve and enter the cooler to be cooled and then return to the oil tank, and therefore the purpose of saving energy consumption when cooling hydraulic oil is achieved.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic view of the structural principle of the present invention.

In the figure: 1. the hydraulic system comprises an oil tank, 2 parts of a plunger pump, 3 parts of a hydraulic cylinder, 4 parts of an M-type reversing valve, 5 parts of a first check valve, 6 parts of a third check valve, 7 parts of a cooler, 8 parts of an oil return filter, 9 parts of an overflow valve, 10 parts of a second check valve, 11 parts of a throttle valve, 12 parts of an on-off valve and 13 parts of a temperature sensor.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the energy saving device for a hydraulic station comprises an oil tank 1, and three plunger pumps 2 and hydraulic cylinders 3 which are arranged in parallel, wherein the plunger pumps 2 pump the hydraulic oil in the oil tank 1 into the hydraulic cylinders 3.

An M-shaped reversing valve 4 is arranged on an oil way of the plunger pump 2 leading to the hydraulic cylinder 3, a throttling valve 11 is arranged on a pipeline between the M-shaped reversing valve 4 and the hydraulic cylinder 3, a first one-way valve 5 is arranged on an oil inlet pipeline of the M-shaped reversing valve 4, and a third one-way valve 6 is arranged on an oil return pipeline of the M-shaped reversing valve 4.

And a cooler 7 and an oil return filter 8 are sequentially arranged on a pipeline between the third one-way valve 6 and the oil tank 1, an overflow valve 9 and a second one-way valve 10 are connected between the inlet end of the first one-way valve 5 and the outlet end of the third one-way valve 6 through pipelines, and the overflow pressure of the overflow valve 9 is less than ten kilograms of the outlet pressure of the plunger pump 2.

The pipeline of the water inlet of the cooler 7 is provided with an on-off valve 12, the oil tank 1 is provided with a temperature sensor 13 for measuring the oil temperature, and the temperature sensor 13 controls the opening degree of the valve core of the on-off valve 12 after comparing the detected temperature signal with a temperature setting value.

The utility model discloses having demolishd the screw pump package that original cooling system need 24 hours to move, having set for the export pressure of plunger pump 2 to 130kg through overflow valve 9 by plunger pump 2 output fluid, set up overflow valve 9 to 120kg overflow, make the pump opening pressure of plunger pump 2 stabilize at 120kg, unnecessary 10 kg pressure and flow are through overflow valve 9, second check valve 10 to cooler 7, the fluid after the cooling is returned to oil tank 1 after filtering through return oil filter 8; and the other path of oil pressure of 120kg passes through the first check valve 5 and enters the M-shaped reversing valve 4, and because the action frequency of the actuating element hydraulic cylinder 3 is not high in the production process of the rolling mill, when the M-shaped reversing valve 4 is in a neutral position, the pressure oil passes through the M-shaped reversing valve 4, flows back through the third check valve 6, enters the cooler 7 for cooling, returns to the oil return filter 8, is filtered and enters the oil tank 1. In addition, the oil tank 1 is provided with a temperature sensor 13, and after an oil temperature signal in the oil tank 1 is detected, the temperature sensor is compared with a temperature setting value to adjust the opening degree of the valve core of the on-off valve 12, so that the flow of cooling water is changed. When the oil temperature reaches the set value, the on-off valve 12 is kept at a certain opening degree. When the oil temperature deviates from the set value due to other reasons, the opening degree of the on-off valve 12 can be automatically increased or decreased, the flow of the cooling water is adjusted, the oil temperature basically keeps the set value, and the condition that the oil temperature is controlled by manually operating the opening degree of the ball valve in the conventional hydraulic station is changed.

And three plunger pumps are used for two in the production process of the rolling mill. When the rolling mill production line is changed, the three plunger pumps 2 are changed into one standby two-purpose mode, one plunger pump 2 is selected as a main pump, the other plunger pump is selected as a slave pump, and the running condition of the slave pump is determined by a signal of a pressure relay at the outlet of the main pump; the hydraulic cylinder 3 acts, the flow required by the system is increased, the system pressure is reduced, when the pressure fluctuation of the main pump port is lower than a certain value, the slave pump starts to operate (the operation time is temporarily set to be 20 minutes, and then adjustment is carried out according to actual operation needs), after the operation is carried out for 20 minutes, the slave pump stops operating in the state that the pressure of the main pump outlet is stable, and the main pump only provides the pressure maintaining flow of the system. Because the time that the plunger pump 2 as the main pump is in the pressure maintaining state is longer, most of the working time can be finished by one main pump after the improvement, and the electricity-saving effect is obvious.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a hydraulic pressure station economizer, has oil tank (1), plunger pump (2) and pneumatic cylinder (3), and plunger pump (2) are with hydraulic oil pump pumping pneumatic cylinder (3) in oil tank (1), characterized by: the oil way that plunger pump (2) accesss to pneumatic cylinder (3) on be equipped with M type switching-over valve (4), be equipped with first check valve (5) on the oil inlet pipeline of M type switching-over valve (4), be equipped with third check valve (6) on the oil return pipeline of M type switching-over valve (4), be equipped with cooler (7), oil return filter (8) on the pipeline between third check valve (6) and oil tank (1) in proper order, tube coupling is provided with overflow valve (9) and second check valve (10) between first check valve (5) entrance point and third check valve (6) exit end, the overflow pressure of overflow valve (9) is less than ten kilograms of plunger pump (2) outlet pressure.

2. The hydraulic station energy saver of claim 1 further characterized by: the plunger pump (2) is provided with three plunger pumps in parallel, and a throttle valve (11) is arranged on a pipeline between the M-shaped reversing valve (4) and the hydraulic cylinder (3).

3. The hydraulic station energy saver of claim 1 further characterized by: the pipeline of the water inlet of the cooler (7) is provided with an on-off valve (12), the oil tank (1) is provided with a temperature sensor (13) for measuring the oil temperature, and the temperature sensor (13) controls the opening degree of a valve core of the on-off valve (12) after comparing a detected temperature signal with a temperature setting value.