Master-slave oil cylinder pressure difference driving switching full-automatic hydraulic loop for filter press

Abstract

The utility model relates to the technical field of filter presses, and discloses a master-slave oil cylinder differential pressure driving switching full-automatic hydraulic loop for a filter press, which comprises a hydraulic oil tank, a hydraulic oil pump is fixedly connected to one side of the outer wall of the front end of the hydraulic oil tank, and the output end of the hydraulic oil pump is fixedly connected with a first liquid outlet pipe. The end, away from the hydraulic oil pump, of the first liquid outlet pipe is fixedly connected with an overflow valve. During use, the hydraulic oil pump, the overflow valve and the hydraulic control reversing valve are started, the hydraulic oil pump supplies liquid to a rodless cavity of the driving oil cylinder through a pipeline and pushes an oil cylinder rod of the driving oil cylinder to move forwards, and hydraulic oil in a rod cavity of the driving oil cylinder returns to the hydraulic oil tank through the hydraulic control reversing valve; the rodless cavity is filled with liquid through the liquid filling valve, and the rod cavity returns hydraulic oil to the hydraulic oil tank through the pipeline, so that high-efficiency and low-consumption quick-opening operation of the filter press is realized on the premise of not increasing the flow of the hydraulic pump and the specification of a hydraulic station and not improving the type selection of a motor of the hydraulic pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter press technical field especially uses master slave oil cylinder pressure difference drive switching full automatic hydraulic circuit of filter press. BACKGROUND

[0002] As a kind of widely used traditional filter equipment, filter press has the characteristics such as simple process, large filtration pressure difference and stable work, and is widely used in chemical industry, pharmacy, metallurgy, dye, food, brewing, ceramics and environmental protection industry, and filter press usually needs differential hydraulic circuit to provide the power of hydraulic cylinder.

[0003] Some filter presses use differential circuit to provide the extension speed of hydraulic cylinder, but differential circuit cannot improve the retraction speed of oil cylinder, and the improvement of extension speed is also limited, generally only one times hydraulic cylinder extension speed can be improved, in order to meet the fast opening needs of filter press, the flow of hydraulic cylinder supporting hydraulic station must be improved, larger specification hydraulic pump is selected, and larger motor is matched to meet the needs of process, so that equipment cost is high, and operation energy consumption is high, and energy efficiency is low.

[0004] Therefore, the master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press is provided by the person skilled in the art to solve the problems in the background art. CONTENT OF UTILITY MODEL

[0005] The utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press, which is provided with an electromagnetic valve, after the closing plate is in place, the electromagnetic valve is opened, the hydraulic pump supplies liquid to the rodless cavity of the driving oil cylinder and the driven oil cylinder at the same time, full-pressure compression is realized, and the electromagnetic valve is kept open to realize the pressure balance of the five hydraulic cylinders during the whole compression process. When the pressure reaches the set oil pressure, the hydraulic control check valve, overflow valve and hydraulic oil pump are closed in order to realize energy saving. The driving oil cylinder and the driven oil cylinder are protected by the hydraulic lock circuit of the hydraulic control check valve and the liquid filling valve, the rodless cavity is pressure maintained, high-efficiency full-pressure compression is realized during the compression of the filter plate, the pressure maintaining effect is good, and the pressure maintaining time is long.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The application discloses a full-automatic hydraulic circuit with master-slave oil cylinder pressure difference driving switch for filter press, which comprises a hydraulic oil tank, a second liquid outlet pipe, a hydraulic oil pump fixedly connected to one side of the front end outer wall of the hydraulic oil tank, a first liquid outlet pipe fixedly connected to the output end of the hydraulic oil pump, an overflow valve fixedly connected to the end of the first liquid outlet pipe away from the hydraulic oil pump, a flow pipe fixedly connected to the front end of the outer wall of one side of the overflow valve, a hydraulic control reversing valve fixedly connected to the end of the flow pipe away from the overflow valve, a first liquid return pipe fixedly connected to the outer wall of one side of the hydraulic control reversing valve away from the flow pipe, a liquid delivery pipe fixedly connected to one side of the upper surface of the hydraulic control reversing valve, a backflow pipe fixedly connected to the other side of the upper surface of the hydraulic control reversing valve, a support block arranged on one side of the hydraulic oil tank, and a driving oil cylinder fixedly connected to the middle part of the upper surface of the support block.

[0008] Two driven oil cylinders are fixedly connected to the two sides of the upper surface of the support block, a safety pipe is fixedly connected to the other side of the front end outer wall of the hydraulic oil tank, a second liquid return pipe is fixedly connected to the outer wall of one side of the hydraulic oil tank, a second connecting pipe is fixedly connected to the rear end of one side of the middle part of the liquid delivery pipe, an electromagnetic valve is arranged on the pipe body of the second connecting pipe, a first connecting pipe is fixedly connected to the lower end of the middle part of the pipe body of the backflow pipe, and a liquid filling valve is arranged on the pipe body of the first connecting pipe.

[0009] Through the above technical scheme, the speed of the filter press plate is improved by 5 times, so that the speed of the filter press plate is greatly improved, and the filter press plate is efficiently and fully pressed during the pressing process of the filter press plate, the pressure maintaining effect is good, and the pressure maintaining time is long.

[0010] Further, one end of the first liquid return pipe away from the hydraulic control reversing valve is fixedly connected to the middle part of the front end outer wall of the hydraulic oil tank, one end of the liquid delivery pipe away from the hydraulic control reversing valve is fixedly connected to one side of the upper surface of the driving oil cylinder, one end of the backflow pipe away from the hydraulic control reversing valve is fixedly connected to the other side of the upper surface of the driving oil cylinder, and one end of the second liquid outlet pipe away from the hydraulic oil tank is fixedly connected to the outer wall of one side of the driven oil cylinder.

[0011] Through the above technical scheme, the pipes can be better connected, so that the flow of liquid is realized.

[0012] Further, the front end of one side of the pipe body of the second liquid outlet pipe is fixedly connected with the safety pipe, the pipe body of the safety pipe is sequentially provided with a pressure relief valve, a fourth pressure gauge and a safety valve.

[0013] Through the above technical scheme, the driving pressure relief can be realized when the pressure of the rodless cavity of the oil cylinder is increased to the set high value.

[0014] Further, the pipe body of the first liquid outlet pipe is sleeved with a pipeline filter, one-way pipes are fixedly connected to the upper end of one side of the pipe body of the return pipe, a hydraulic control one-way valve is sleeved with one side of the pipe body of the infusion pipe, and the one-way pipe away from the return pipe is fixedly connected with the hydraulic control one-way valve.

[0015] Through the technical scheme, the impurities in the liquid can be filtered through the pipeline filter, and the impurities are prevented from adhering to the pipe wall.

[0016] Further, an oil level gauge is arranged on the outer wall of one side of the hydraulic oil tank away from the second return liquid pipe, and an air dryer is arranged on the outer wall of the rear end of the hydraulic oil tank.

[0017] Through the technical scheme, the capacity of the liquid in the hydraulic oil tank can be conveniently observed through the oil level gauge.

[0018] Further, a filter press is fixedly connected to one side of the main oil cylinder and the driven oil cylinder.

[0019] Through the technical scheme, the filter press can be closed and opened by driving the pressing plate.

[0020] Further, the pipe body of the flow pipe is provided with a first pressure gauge, the middle part of the pipe body of the infusion pipe is provided with a second pressure gauge, and the middle part of the pipe body of the return pipe is provided with a third pressure gauge.

[0021] Through the technical scheme, the pressure value in the pipeline can be more conveniently observed.

[0022] Further, a pressure sensor is arranged on one side of the second pressure gauge, and the pressure sensor is sleeved with the pipe body of the infusion pipe.

[0023] Through the technical scheme, the pressure sensor can provide real-time pressure data for an automatic control system.

[0024] The utility model has the following beneficial effects:

[0025] 1. The main and slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for the filter press is provided by the utility model, the hydraulic oil pump is arranged, the hydraulic oil pump, the overflow valve and the hydraulic control reversing valve are opened during use, the hydraulic oil pump supplies liquid to the rodless cavity of the main oil cylinder through the pipeline, the oil cylinder rod of the main oil cylinder is pushed forward, the hydraulic oil in the rod cavity of the main oil cylinder returns to the hydraulic oil tank through the hydraulic control reversing valve, the rodless cavity of the driven oil cylinder is filled through the liquid filling valve under the pushing of the main oil cylinder, and the rod cavity returns the hydraulic oil to the hydraulic oil tank through the pipeline, the filter press closing and opening speed is improved, the high efficiency, low consumption and fast opening operation of the filter press are realized under the premise of not increasing the flow of the hydraulic pump, the specification of the hydraulic station and not improving the motor selection of the hydraulic pump.

[0026] 2. The utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press, the device is through the electromagnetic valve of setting, the combination board is in place, opens electromagnetic valve, and the rodless cavity of hydraulic pump gives initiative oil cylinder and driven oil cylinder is supplied with liquid simultaneously, realizes full pressure compaction, realizes 5 hydraulic oil cylinder pressure balance in whole compaction process, and electromagnetic valve wants to maintain opening state all the time, when pressure reaches the oil pressure of setting, then order closes liquid control check valve, overflow valve and hydraulic oil pump, realizes energy -conserving, and initiative oil cylinder and driven oil cylinder are under the protection of liquid control check valve and liquid filling valve's hydraulic lock loop, realize the rodless cavity pressure conservation, thereby realize efficient, full pressure compaction in filter plate compaction process, and the pressure conservation effect is good, and the pressure conservation time is long. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the axonometric drawing of the utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press;

[0028] Figure 2 It is the plan view of the utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press;

[0029] Figure 3 It is the structure schematic view of hydraulic pipe and other components in the utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press;

[0030] Figure 4 It is the structure schematic view of filter press and other components in the utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press;

[0031] Figure 5 It is the side view of the utility model discloses a master-slave oil cylinder pressure difference drive switching full-automatic hydraulic circuit for filter press.

[0032] LEGEND:

[0033] 1, hydraulic oil tank;2, hydraulic oil pump;3, overflow valve;4, liquid control reversing valve;5, liquid control check valve;6, electromagnetic valve;7, pressure relief valve;8, safety valve;9, liquid filling valve;10, first pressure gauge;11, second pressure gauge;12, pressure sensor;13, third pressure gauge;14, fourth pressure gauge;15, first liquid outlet pipe;16, initiative oil cylinder;17, driven oil cylinder;18, oil level gauge;19, air dryer;20, pipeline filter;21, support block;22, second connecting pipe;23, filter press;24, flow pipe;25, liquid delivery pipe;26, return pipe;27, first liquid return pipe;28, second liquid return pipe;29, second liquid outlet pipe;30, safety pipe;31, check valve;32, first connecting pipe. DETAILED DESCRIPTION

[0034] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0035] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application. Figures 1-5 The present application provides an embodiment:

[0036] The master-slave oil cylinder pressure difference driving switching full-automatic hydraulic circuit for filter press comprises a hydraulic oil tank 1, a hydraulic oil pump 2 fixedly connected to one side of the front end outer wall of the hydraulic oil tank 1, a first liquid outlet pipe 15 fixedly connected to the output end of the hydraulic oil pump 2, an overflow valve 3 fixedly connected to the end of the first liquid outlet pipe 15 away from the hydraulic oil pump 2, a flow pipe 24 fixedly connected to the end of the overflow valve 3 away from the flow pipe 24, a liquid control reversing valve 4 fixedly connected to the end of the flow pipe 24 away from the liquid control reversing valve 4, a first liquid return pipe 27 fixedly connected to the side outer wall of the liquid control reversing valve 4 away from the flow pipe 24, a liquid delivery pipe 25 fixedly connected to one side of the upper surface of the liquid control reversing valve 4, and a liquid return pipe 26 fixedly connected to the other side of the upper surface of the liquid control reversing valve 4.

[0037] Two driven oil cylinders 17 are fixedly connected to the upper surfaces of both sides of the support block 21, a safety pipe 30 is fixedly connected to the other side of the front end outer wall of the hydraulic oil tank 1, a second liquid return pipe 28 is fixedly connected to the side outer wall of the hydraulic oil tank 1, a second connecting pipe 22 is fixedly connected to the rear end of one side of the middle part of the liquid delivery pipe 25, an electromagnetic valve 6 is arranged on the pipe body of the second connecting pipe 22, a first connecting pipe 32 is fixedly connected to the lower end of the middle part of the liquid return pipe 26, and a liquid charging valve 9 is arranged on the pipe body of the first connecting pipe 32.

[0038] The device realizes five times speed improvement when the filter press 23 is closed, so that the speed during closing and opening of the filter press is greatly improved, and efficient and full-pressure compression is realized during compression of the filter plate of the filter press 23, so that the pressure maintaining effect is good and the pressure maintaining time is long.

[0039] The first liquid return pipe 27 is fixedly connected to the middle part of the outer wall of the front end of the hydraulic oil tank 1 away from the hydraulic control reversing valve 4, the liquid delivery pipe 25 is fixedly connected to one side of the upper surface of the driving oil cylinder 16 away from the hydraulic control reversing valve 4, the return flow pipe 26 is fixedly connected to the other side of the upper surface of the driving oil cylinder 16 away from the hydraulic control reversing valve 4, the second liquid outlet pipe 29 is fixedly connected to one side of the outer wall of the driven oil cylinder 17 away from the hydraulic oil tank 1, and the second liquid return pipe 28 is fixedly connected to one side of the lower surface of the driven oil cylinder 17 away from the hydraulic oil tank 1, so that the pipes can be better connected, the flow of liquid can be realized, the safety pipe 30 is fixedly connected to one side of the front end of the second liquid outlet pipe 29, the safety pipe 30 is sequentially provided with the pressure relief valve 7, the fourth pressure gauge 14 and the safety valve 8, so that the driving pressure relief can be realized when the pressure in the rodless cavity of the oil cylinder rises to a set high value, the pipe filter 20 is arranged on the pipe body of the first liquid outlet pipe 15, the one-way pipe 31 is fixedly connected to the upper end of one side of the pipe body of the return flow pipe 26, the liquid control one-way valve 5 is arranged on one side of the pipe body of the liquid delivery pipe 25, and the one-way pipe 31 is fixedly connected to the liquid control one-way valve 5 away from the return flow pipe 26, so that the impurities in the liquid can be filtered through the pipe filter 20, and the impurities can be prevented from adhering to the pipe wall, the oil level gauge 18 is arranged on one side of the outer wall of the hydraulic oil tank 1 away from the second liquid return pipe 28, and the air dryer 19 is arranged on the rear end of the outer wall of the hydraulic oil tank 1, so that the capacity of the liquid in the hydraulic oil tank 1 can be conveniently observed through the oil level gauge 18, the filter press 23 is fixedly connected to one side of the outer wall of the driving oil cylinder 16 and the driven oil cylinder 17, so that the filter press 23 can be driven to close and open the plate, the first pressure gauge 10 is arranged on the pipe body of the flow pipe 24, the second pressure gauge 11 is arranged on the middle part of the pipe body of the liquid delivery pipe 25, and the third pressure gauge 13 is arranged on the middle part of the pipe body of the return flow pipe 26, so that the pressure value in the pipe can be more conveniently observed, and the pressure sensor 12 is arranged on one side of the second pressure gauge 11 and arranged on the pipe body of the liquid delivery pipe 25, so that the pressure sensor 12 can provide real-time pressure data for the automatic control system.

[0040] Working principle: when in use, the hydraulic oil pump 2, the overflow valve 3 and the hydraulic control reversing valve 4 are opened, the hydraulic oil pump 2 supplies the no-rod cavity of the driving oil cylinder 16 with liquid through the pipeline, the oil cylinder rod of the driving oil cylinder 16 is pushed forward, the hydraulic oil in the rod cavity of the driving oil cylinder 16 returns to the hydraulic oil tank 1 through the hydraulic control reversing valve 4, the driven oil cylinder 17 is pushed by the driving oil cylinder 16, the no-rod cavity of the driven oil cylinder 17 is filled with liquid through the filling valve 9, and the rod cavity of the driven oil cylinder 17 returns the hydraulic oil to the hydraulic oil tank 1 through the pipeline, so that the speed of the filter press 23 is improved by five times during the plate closing process, the plate closing speed is greatly improved, after the plate closing, the electromagnetic valve 6 is opened, the hydraulic pump supplies the no-rod cavities of the driving oil cylinder 16 and the driven oil cylinder 17 with liquid at the same time, full pressure is realized, during the whole pressing process, in order to realize the pressure balance of the five hydraulic cylinders, the electromagnetic valve 6 needs to be kept open, when the pressure reaches the set oil pressure, the hydraulic control one-way valve 5, the overflow valve 3 and the hydraulic oil pump 2 are sequentially closed, energy saving is realized, the no-rod cavities of the driving oil cylinder 16 and the driven oil cylinder 17 are protected by the hydraulic lock circuit of the hydraulic control one-way valve 5 and the filling valve 9, the no-rod cavities are kept pressure, when the pressure of the no-rod cavities is passively increased to the set high value, the pressure relief valve 7 is opened, active pressure relief is performed, when the pressure of the no-rod cavities is reduced to the set low value, the hydraulic oil pump 2, the overflow valve 3 and the hydraulic control reversing valve 4 are sequentially opened to supplement the pressure of the no-rod cavities, so that the pressure of the whole filter press 23 extrusion process is relatively stable, after the pressure keeping is finished, before the plate opening, the pressure relief valve 7 is opened to reduce the oil pressure of the no-rod cavities to the set value, after the pressure relief is completed, the hydraulic oil pump 2, the overflow valve 3 and the hydraulic control reversing valve 4 are sequentially opened to fill the rod cavity of the driving oil cylinder 16 with liquid, the hydraulic control one-way valve 5 and the filling valve 9 are opened at the same time, the no-rod cavity of the driving oil cylinder 16 returns the hydraulic oil to the hydraulic oil tank 1 through the hydraulic control one-way valve 5 and the hydraulic control reversing valve 4, the no-rod cavity of the driven oil cylinder 17 returns the hydraulic oil to the hydraulic oil tank 1 through the filling valve 9, and the rod cavity of the driven oil cylinder 17 fills the liquid through the direct connection pipeline between the hydraulic oil tank 1, so that the opening and closing plate process of the filter press 23 realizes five times speed-up.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the protection scope of the present application.

Claims

1. A master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press, comprising a hydraulic oil tank (1) and a second liquid outlet pipe (29), characterized in that: The outer wall of one side of the front end of the hydraulic oil tank (1) is fixedly connected with a hydraulic oil pump (2), the output end of the hydraulic oil pump (2) is fixedly connected with a first liquid outlet pipe (15), one end of the first liquid outlet pipe (15) away from the hydraulic oil pump (2) is fixedly connected with an overflow valve (3), the front end of the outer wall of one side of the overflow valve (3) is fixedly connected with a flow pipe (24), one end of the flow pipe (24) away from the overflow valve (3) is fixedly connected with a hydraulic control reversing valve (4), the outer wall of one side of the hydraulic control reversing valve (4) away from the flow pipe (24) is fixedly connected with a first liquid return pipe (27), one side of the upper surface of the hydraulic control reversing valve (4) is fixedly connected with a liquid delivery pipe (25), the other side of the upper surface of the hydraulic control reversing valve (4) is fixedly connected with a return pipe (26), one side of the hydraulic oil tank (1) is provided with a supporting block (21), the upper surface of the middle of the supporting block (21) is fixedly connected with a driving oil cylinder (16). The outer wall of one side of the hydraulic oil tank (1) is fixedly connected with a second liquid return pipe (28), the rear end of one side of the middle of the pipe body of the liquid delivery pipe (25) is fixedly connected with a second connecting pipe (22), the pipe body of the second connecting pipe (22) is sleeved with a solenoid valve (6), the lower end of the middle of the pipe body of the return pipe (26) is fixedly connected with a first connecting pipe (32), the pipe body of the first connecting pipe (32) is sleeved with a liquid filling valve (9).

2. The full-automatic hydraulic circuit with master-slave oil cylinder differential pressure driving switching for filter press according to claim 1, characterized in that: One end of the first liquid return pipe (27) away from the hydraulic control reversing valve (4) is fixedly connected with the middle of the outer wall of the front end of the hydraulic oil tank (1), one end of the liquid delivery pipe (25) away from the hydraulic control reversing valve (4) is fixedly connected with one side of the upper surface of the driving oil cylinder (16), one end of the return pipe (26) away from the hydraulic control reversing valve (4) is fixedly connected with the other side of the upper surface of the driving oil cylinder (16), one end of the second liquid outlet pipe (29) away from the hydraulic oil tank (1) is fixedly connected with the outer wall of one side of the driving oil cylinder (17), one end of the second liquid return pipe (28) away from the hydraulic oil tank (1) is fixedly connected with one side of the lower surface of the driving oil cylinder (17).

3. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 1, characterized in that: The front end of one side of the pipe body of the second liquid outlet pipe (29) is fixedly connected with a safety pipe (30), the pipe body of the safety pipe (30) is sequentially provided with a pressure relief valve (7), a fourth pressure gauge (14) and a safety valve (8).

4. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 1, characterized in that: The pipe body of the first liquid outlet pipe (15) is sleeved with a pipeline filter (20), the upper end of one side of the pipe body of the return pipe (26) is fixedly connected with a one-way pipe (31), one side of the pipe body of the liquid delivery pipe (25) is sleeved with a hydraulic control one-way valve (5), one end of the one-way pipe (31) away from the return pipe (26) is fixedly connected with the hydraulic control one-way valve (5).

5. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 1, characterized in that: The outer wall of one side of the hydraulic oil tank (1) away from the second liquid return pipe (28) is provided with an oil level gauge (18), the rear end of the outer wall of the hydraulic oil tank (1) is provided with an air dryer (19).

6. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 1, characterized in that: One side outer wall of the main oil cylinder (16) and the driven oil cylinder (17) is fixedly connected with a filter press (23).

7. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 1, characterized in that: The pipe body of the flow pipe (24) is provided with a first pressure gauge (10), the middle part of the pipe body of the infusion pipe (25) is provided with a second pressure gauge (11), and the middle part of the pipe body of the backflow pipe (26) is provided with a third pressure gauge (13).

8. The master-slave oil cylinder differential pressure driving switching full-automatic hydraulic circuit for filter press according to claim 7, characterized in that: One side of the second pressure gauge (11) is provided with a pressure sensor (12), and the pressure sensor (12) is sleeved on the pipe body of the infusion pipe (25).

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