CN211202515U - Filter device and press machine heavy-load oil cylinder system with same - Google Patents

Abstract

The utility model relates to a press hydraulic control technical field, more specifically relates to a filter equipment, first return circuit, second return circuit and the third return circuit that passes through the cross connection intercommunication including oil inlet and oil-out, first return circuit on be equipped with first check valve, the third return circuit on be equipped with first high-pressure ball valve, the second return circuit on be equipped with second high-pressure ball valve, high pressure filter and second check valve. Heavy load oil cylinder system of press, including filtration system, hydraulic system and actuating mechanism, filtration system include first filter mechanism, second filter mechanism and third filter mechanism, first filter mechanism, second filter mechanism and third filter mechanism be foretell filter equipment, hydraulic system, filter mechanism and actuating mechanism connect gradually. The electromagnetic valve blocking fault elimination can be realized, meanwhile, the personnel maintenance man-hour can be saved, and other devices which are shut down for a long time are avoided.

Description

Filter device and press machine heavy-load oil cylinder system with same

Technical Field

The utility model relates to a press hydraulic control technical field, more specifically relates to a filter equipment and have its press heavy load hydro-cylinder system.

Background

The automobile body shell plate belongs to a stamping part and is formed by punching a corresponding die driven by a press machine. In a large-scale automatic stamping production line, a die is fixed on a movable workbench of a press machine for stamping, the movable workbench drives the die to start to a production position in the die changing process, wherein the weight of the die is different from several tons to tens of tons, and the weight of the movable workbench can reach about 50 tons as a whole. During production, after the movable workbench is started to a working position, a lifting oil cylinder is arranged at a position of the guide rail of the base of the press machine, which corresponds to the wheels of the workbench, and the lifting oil cylinder moves downwards; when the workbench is detected to fall in place, the clamping oil cylinder clamps the four fixed blocks of the workbench, so that the lateral force of forming and the like can be borne during stamping production. When the mould is replaced, the lifting oil cylinder moves upwards after the clamping oil cylinder moves upwards to prevent the fixed block of the workbench from being clamped; and when the workbench is detected to rise to the starting position, starting the workbench to move to convey the die out of the press machine.

The hydraulic principle related to the action of the workbench is shown in a figure 1, the action process of the workbench is divided into two action combinations of opening-in, falling-clamping, loosening-jacking and opening, hydraulic oil directly returns to a tank through an electromagnetic valve during loosening and clamping actions, hydraulic oil directly returns to the tank through the electromagnetic valve during jacking and falling actions, the clamping action is controlled to stop by a pressure switch 1, the loosening action is controlled to stop by a pressure switch 2, the falling action is stopped by a detector at the bottom of the workbench, the jacking action is controlled to stop by a detector in place of the workbench, the whole action process is controlled by P L C, and starting and stopping are carried out by matching with a feedback signal of a sensor.

Because hydraulic system's design leak does not install filter equipment additional between solenoid valve and hydro-cylinder, only has the filter equipment of design at the front end of solenoid valve, the front end of pump, can not filter the piece that produces with the hydro-cylinder sealing washer wearing and tearing. When the working table is asynchronous in ascending and descending processes and long-term action can cause sealing abrasion of the clamping cylinder and the jacking cylinder, the current device has no intermediate filtering device in an oil return process, if an oil cylinder sealing ring is abraded, abrasion debris directly returns to the electromagnetic valve in the oil return process of the oil cylinder, and the valve core of the electromagnetic valve is blocked; the sealing state of the clamping cylinder and the jacking cylinder cannot be known in normal production and shutdown time, and the sealing damage or the cylinder body damage can only be known after the blockage of the electromagnetic valve and the leakage of the cylinder body, so that the long-time shutdown is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a filter equipment and have its press heavy load hydro-cylinder system, can realize solenoid valve card and hinder the trouble elimination, can save personnel's maintenance man-hour simultaneously again, avoid causing the device of other long-time shut downs.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a filter equipment, includes first return circuit, second return circuit and the third return circuit that oil inlet and oil-out pass through the four-way connection intercommunication, first return circuit on be equipped with first check valve, the third return circuit on be equipped with first high-pressure ball valve, the second return circuit on be equipped with second high-pressure ball valve, high pressure filter and second check valve.

In the device, two ends of a first loop, a second loop and a third loop are converged to form two inlets and outlets, high-pressure oil enters or is output from the inlets and outlets, wherein the inlets and outlets can be exchanged according to use conditions, when the device is put into operation, the high-pressure oil enters the first loop, a high-pressure ball valve in the second loop is in a normally open state, a high-pressure ball valve in the third loop is in a closed state, and because of the flow blocking effect of a second one-way valve in the second loop, the high-pressure oil can only be output through the first one-way valve through the first loop, but when oil is returned, the high-pressure oil flows back to the filtering device from the original outlet, because of the flow blocking effect of the first one-way valve in the first loop, the returned high-pressure oil can only pass through the second loop, the high-pressure oil filters sealing debris after passing through a high-pressure filter in the second loop, and the filtered high-pressure oil can be recycled, the electromagnetic valve is prevented from being blocked and damaged. In addition, because there is sealed piece gathering to lead to high pressure filter to damage or pile up too much piece and lead to filtering quality to descend in the high pressure filter, consequently, in this case, can carry out maintenance to high pressure filter, when carrying out maintenance, close second high pressure ball valve, effectively prevent the hydraulic oil backward flow, it is extravagant to avoid the hydraulic oil outflow, open first high pressure ball valve, the second return circuit blocks promptly, high-pressure oil carries out input/output through the third return circuit, consequently, can guarantee system normal use when maintenance, need not the maintenance of shutting down.

Furthermore, the second high-pressure ball valve, the high-pressure filter and the second one-way valve are arranged in sequence. When carrying out the input of high-pressure oil, in the second return circuit, directly carry out the choked flow through second high pressure ball valve, guarantee that high-pressure oil can directly carry out the input through first return circuit, also avoid high-pressure oil to flow into to the second return circuit simultaneously, when the backward flow, the hydraulic oil of backward flow need pass through the check valve again after high pressure filter filters hydraulic oil, can avoid the check valve to block up. In addition, when needs maintenance, directly through closing second high pressure ball valve, can avoid hydraulic oil to get into to the second return circuit, avoid the hydraulic oil backward flow in the maintenance, lead to the hydraulic oil waste that outflows.

Further, the first check valve and the second check valve are opposite in direction. Can guarantee like this that hydraulic oil can only pass through the input of first return circuit and can not flow into the second return circuit when inputing hydraulic oil, hydraulic oil can only pass through the second return circuit in the oil return, can not flow into first return circuit.

Furthermore, the high-pressure filter is detachably provided with a filter element. Filter core demountable installation, the filter effect descends after the filter core has accumulated a certain amount of piece, can through dismantle renew cartridge can, need not to change whole high pressure filter, maintain convenient and fast more.

Furthermore, the first loop, the second loop and the third loop are all of hard tube structures. The first loop, the second loop and the third loop are guaranteed to be capable of bearing the pressure of high-pressure oil and are attractive and durable.

Furthermore, the first loop, the second loop and the third loop form a closed middle-character-shaped structure.

The utility model provides a press heavy load hydro-cylinder system, includes filtration system, hydraulic system and actuating mechanism, filtration system include first filter mechanism, second filter mechanism and third filter mechanism, first filter mechanism, second filter mechanism and third filter mechanism be foretell filter equipment, hydraulic system, filter mechanism and actuating mechanism connect gradually.

The device outputs high-pressure oil through the hydraulic system, the output high-pressure oil is input into the executing mechanism after passing through the filtering device, the executing mechanism executes actions, when the oil way is input, the high-pressure oil passes through the first loop and is output into the executing mechanism, the pressure of the high-pressure oil can be kept, when the oil is returned, the hydraulic oil is filtered through the second loop in the filtering system, and the filtered hydraulic oil returns to the hydraulic system again to be recycled for next use. Through setting up filtration system, can avoid sealed piece jamming hydraulic system effectively, bring hydraulic system to break down. And this device need not to carry out too much transformation, under the prerequisite of not reforming transform the hydraulic circuit body, only need add filtration system can, rational in infrastructure, simple transformation is convenient.

Furthermore, the actuating mechanism comprises a clamping hydraulic cylinder and a jacking hydraulic cylinder, the clamping hydraulic cylinder is provided with a first upper cavity and a first lower cavity, the jacking hydraulic cylinder is provided with a second upper cavity and a second lower cavity, the first upper cavity is connected with the second filtering mechanism, the first lower cavity is connected with the first filtering mechanism, the second lower cavity is connected with the third filtering mechanism, and the second upper cavity is connected with the hydraulic system.

When the jacking hydraulic cylinder acts, high-pressure oil enters the second lower cavity, the hydraulic oil in the second upper cavity directly flows back to the hydraulic system and does not pass through other elements or mechanisms, when the high-pressure oil is input into the jacking hydraulic cylinder, the high-pressure oil only passes through the first loop, and the third loop is in normally closed filling and is used as a bypass; in the falling process, the piston of the jacking hydraulic cylinder moves downwards, hydraulic oil can only pass through the second loop in the reverse direction, and the filtered hydraulic oil flows back to the hydraulic system. Similarly, in the clamping hydraulic cylinder, hydraulic oil in the first lower cavity can only reversely pass through the second loop during the clamping action and flow back to the hydraulic system. Therefore, hydraulic oil can pass through the filter in the oil return process, oil can be effectively filtered, and ageing sealing ring fragments are prevented from blocking a hydraulic system.

Furthermore, hydraulic system include solenoid valve and oil tank, the solenoid valve be connected with the oil tank, first filtering mechanism, second filtering mechanism and third filtering mechanism all be connected with the solenoid valve, the second epicoele be connected with the oil tank. High-pressure oil passes through the solenoid valve output, filters the piece through filtration system, prevents that ageing sealing washer piece from plugging up the solenoid valve case, damages the solenoid valve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the filter device has a simple structure, can effectively filter hydraulic oil, does not need to be shut down when maintenance and repair are needed, can be used for emergency through a third loop, is convenient for quick recovery during failure, and is convenient for repair and quick switching;

2. according to the heavy-load oil cylinder system of the press machine, the oil cylinder sealing debris is filtered by using the return oil filtering device, so that the blockage of the electromagnetic valve can be basically avoided, the failure rate of equipment is reduced, the starting rate of the equipment is improved, and the cost is saved;

3. the shutdown of the production line caused by equipment abnormality is converted into a prevention and preservation idea, so that the fault time and the spare part consumption can be greatly reduced, and even the faults can be completely eradicated;

4. can know the sealing washer state among the actuating mechanism in advance through the dirty condition of filter core inside to judge the wearing and tearing condition.

Drawings

FIG. 1 is a schematic structural view of a filtering apparatus according to the present invention;

fig. 2 is a schematic view of the oil inlet state of the middle filtering device of the utility model;

FIG. 3 is a schematic view of the oil return state of the middle filtering device of the present invention;

fig. 4 is the structure schematic diagram of the heavy-load oil cylinder system of the middle pressure machine of the utility model.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Examples

As shown in fig. 1, a filtering apparatus includes a first loop 200, a second loop 300, and a third loop 400, in which an oil inlet and an oil outlet are communicated through a four-way joint 100, the first loop 200 is provided with a first one-way valve 500, the third loop 400 is provided with a first high-pressure ball valve 700, and the second loop 300 is provided with a second high-pressure ball valve 800, a high-pressure filter 900, and a second one-way valve 600.

The two ends of the first circuit 200, the second circuit 300 and the third circuit 400 are converged to form two inlets and outlets, high-pressure oil enters or is output from the inlets and outlets, the inlets and outlets can be exchanged according to the use condition, and the first circuit 200, the second circuit 300 and the third circuit 400 are all in hard tube structures, so that the first circuit 200, the second circuit 300 and the third circuit 400 can bear the pressure of the high-pressure oil.

The second high pressure ball valve 800, the high pressure filter 900 and the second check valve 600 are sequentially disposed. When carrying out high-pressure oil input, in second return circuit 300, directly carry out the choked flow through second high-pressure ball valve 800, guarantee that high-pressure oil can directly carry out the input through first return circuit 200, also avoid high-pressure oil to flow into in second return circuit 300 simultaneously, when the backward flow, the hydraulic oil of backward flow need pass through the check valve again after high pressure filter 900 filters hydraulic oil, can avoid the check valve to block up. In addition, when needing the maintenance, directly through closing second high-pressure ball valve 800, can avoid hydraulic oil to enter into second return circuit 300, avoid the hydraulic oil backward flow when the maintenance, lead to the hydraulic oil waste that outflows. In particular, the first check valve 500 and the second check valve 600 are in opposite directions. This ensures that hydraulic oil can only be fed through the first circuit 200 and will not flow into the second circuit 300 when feeding hydraulic oil, and that hydraulic oil can only be fed through the second circuit 300 and will not flow into the first circuit 200 when returning hydraulic oil.

In the present embodiment, to ensure the system responsiveness, the maximum passing flow rate of the high pressure filter 900, the first check valve 500, the second check valve 600, and the four-way joint 100 is greater than the flow rate 100L/min of the hydraulic system 2.

The first loop 200, the second loop 300, and the third loop 400 form a closed zigzag structure. The hard pipes are used for saving the field space and are connected by the hard pipes; the fixing support is manufactured for facilitating subsequent maintenance, integrating the space required by equipment maintenance, the visual height of personnel and the like.

In this embodiment, the high pressure filter 900 is detachably provided with a filter cartridge. Filter core demountable installation, the filter effect descends after the filter core has accumulated a certain amount of piece, can through dismantle renew cartridge can, need not to change whole high pressure cleaner 900, maintains convenient and fast more.

As shown in fig. 2, arrows indicate the flow direction of hydraulic oil, when the device is put into operation, high-pressure oil enters the first circuit 200, the high-pressure ball valve in the second circuit 300 is in a normally open state, the high-pressure ball valve in the third circuit 400 is in a closed state, and due to the flow blocking effect of the second check valve 600 in the second circuit 300, high-pressure oil can only be output through the first check valve 500 through the first circuit 200. As shown in fig. 3, during oil return, high-pressure oil flows back to the filtering device from the original outlet, due to the flow blocking effect of the first check valve 500 in the first circuit 200, the high-pressure oil flowing back can only pass through the second circuit 300, the high-pressure oil passes through the high-pressure filter 900 in the second circuit 300 and then filters sealing debris, and the filtered high-pressure oil can be recycled to avoid blocking and damaging the solenoid valve. In addition, because there is the sealed piece to gather and lead to high pressure filter 900 to damage or pile up too much piece and lead to the filtering quality to descend in high pressure filter 900, therefore, in this case, can carry out maintenance to high pressure filter 900, when carrying out maintenance, close second high-pressure ball valve 800, effectively prevent the hydraulic oil backward flow, avoid the hydraulic oil extravagant that outflows, open first high-pressure ball valve 700, second return circuit 300 blocks, high-pressure oil carries out input/output through third return circuit 400, therefore can guarantee system normal use when maintenance, need not the maintenance of shutting down.

In addition, as shown in fig. 4, the embodiment further discloses a heavy-duty oil cylinder system of the press machine, which includes a filtering system 1, a hydraulic system 2 and an actuating mechanism 3, wherein the filtering system 1 includes a first filtering mechanism 11, a second filtering mechanism 12 and a third filtering mechanism 13, the first filtering mechanism 11, the second filtering mechanism 12 and the third filtering mechanism 13 are the above filtering device, and the hydraulic system 2, the filtering mechanism and the actuating mechanism 3 are sequentially connected.

The hydraulic system 2 comprises an electromagnetic valve and an oil tank, the electromagnetic valve is connected with the oil tank, the first filtering mechanism 11, the second filtering mechanism 12 and the third filtering mechanism 13 are all connected with the electromagnetic valve, and the second upper cavity is connected with the oil tank. High-pressure oil passes through the solenoid valve output, filters the piece through filtration system 1, prevents that ageing sealing washer piece from plugging up the solenoid valve case, damages the solenoid valve.

The pressure of the hydraulic system 2 reaches 20Mpa at most, the filter and related hydraulic elements are high-pressure resistant models, the maximum flow passing rate of the high-pressure filter 900, the first check valve 500, the second check valve 600 and the four-way joint 100 is larger than 100L/min of the flow rate of the hydraulic system 2 in order to ensure the responsiveness of the system, the whole filtering device is in a closed herringbone structure, hard pipes are used for connecting the high-pressure filter, the first check valve 500, the second check valve 600 and the four-way joint 100 in order to save the field space, and a fixing support is manufactured in order to facilitate subsequent maintenance, assemble the space required by equipment maintenance.

In the embodiment, the first filtering mechanism 11, the second filtering mechanism 12 and the third filtering mechanism 13 are all fixed on a bracket, and the bracket is fixed on the maintenance platform by self-tapping screws, so that the integral disassembly is convenient or the bracket can be repeatedly used in other devices; whole filtration system 1 is fixed on the support, guarantees that the filter has sufficient space occasionally when changing the filter core, and convenient some is examined simultaneously.

Specifically, the actuating mechanism 3 includes a clamping hydraulic cylinder 31 and a jacking hydraulic cylinder 32, the clamping hydraulic cylinder 31 is provided with a first upper cavity and a first lower cavity, the jacking hydraulic cylinder 32 is provided with a second upper cavity and a second lower cavity, the first upper cavity is connected with the second filtering mechanism 12, the first lower cavity is connected with the first filtering mechanism 11, the second lower cavity is connected with the third filtering mechanism 13, and the second upper cavity is connected with the hydraulic system 2.

When the jacking hydraulic cylinder 32 acts, high-pressure oil enters the second lower cavity, the hydraulic oil in the second upper cavity directly flows back to the hydraulic system 2, and does not pass through other elements or mechanisms, when the high-pressure oil is input into the jacking hydraulic cylinder 32, the high-pressure oil only passes through the first loop 200, and the third loop 400 is filled in a normally closed mode and used as a bypass; during the dropping process, the piston of the jack-up hydraulic cylinder 32 moves downward, the hydraulic oil can only pass through the second circuit 300 in the reverse direction, and the filtered hydraulic oil flows back to the hydraulic system 2. Similarly, in the clamping cylinder 31, the hydraulic oil in the first lower chamber can only reversely pass through the second circuit 300 during the clamping action and flow back to the hydraulic system 2. Consequently, all can pass through the filter at oil return in-process hydraulic oil, can effectively filter the oil, prevent that ageing sealing washer piece from blockking up hydraulic system 2.

In the heavy-duty oil cylinder system of the press machine, high-pressure oil is output through the hydraulic system 2, the output high-pressure oil is input into the execution mechanism 3 after passing through the filtering device, the execution mechanism 3 executes actions, when an oil way is input, the high-pressure oil passes through the first loop 200 and is output into the execution mechanism 3, the pressure of the high-pressure oil can be kept, when oil returns, the hydraulic oil is filtered through the second loop 300 in the filtering system 1, and the filtered hydraulic oil returns to the hydraulic system 2 again to be recycled for next use. Through setting up filtration system 1, can avoid sealed piece jamming hydraulic system 2 effectively, bring hydraulic system 2 to break down. And this device need not to carry out too much transformation, under the prerequisite of not reforming transform the hydraulic circuit body, only need add filtration system 1 can, rational in infrastructure, simple transformation is convenient.

Through this filter equipment and press heavy load hydro-cylinder system, can cut down equipment down time: the oil return filtering device is added on the basis of the existing hydraulic circuit, so that sealing ring fragments of the clamping cylinder and the jacking cylinder can be effectively prevented from entering the electromagnetic valve, and the production is prevented from being stopped for a long time due to equipment failure.

Predicting faults: the states of the sealing rings of the clamping cylinder and the jacking cylinder are known in advance through the dirty condition in the filter element of the filter, so that the abrasion condition of the cylinder body is judged; the oil circuit overcomes the defects and design defects of the existing oil circuit scheme, the shutdown of the production line caused by equipment abnormality is converted into a prevention and preservation idea, the failure time and the consumption of spare parts can be greatly reduced, and even the failures of the type are avoided.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. The filtering device is characterized by comprising a first loop (200), a second loop (300) and a third loop (400), wherein an oil inlet and an oil outlet are communicated through a four-way joint (100), the first loop (200) is provided with a first one-way valve (500), the third loop (400) is provided with a first high-pressure ball valve (700), and the second loop (300) is provided with a second high-pressure ball valve (800), a high-pressure filter (900) and a second one-way valve (600).

2. A filtering device according to claim 1, characterized in that said second high-pressure ball valve (800), said high-pressure filter (900) and said second non-return valve (600) are arranged in sequence.

3. A filter device as claimed in claim 1, wherein said first (500) and second (600) one-way valves are in opposite directions.

4. A filter device according to claim 1, wherein the high pressure filter (900) is removably provided with a filter cartridge.

5. A filter device as claimed in claim 1, wherein the first circuit (200), the second circuit (300) and the third circuit (400) are of rigid tubular construction.

6. A filter device according to any one of claims 1-5, characterised in that the first circuit (200), the second circuit (300) and the third circuit (400) form a closed zigzag structure.

7. The utility model provides a press heavy load hydro-cylinder system, characterized in that, includes filtration system (1), hydraulic system (2) and actuating mechanism (3), filtration system (1) include first filter mechanism (11), second filter mechanism (12) and third filter mechanism (13), first filter mechanism (11), second filter mechanism (12) and third filter mechanism (13) be the filter equipment of claim 1-6 arbitrary, hydraulic system (2), filter mechanism and actuating mechanism (3) connect gradually.

8. The heavy-duty oil cylinder system of the press machine as claimed in claim 7, wherein said actuator (3) comprises a clamping hydraulic cylinder (31) and a jacking hydraulic cylinder (32), said clamping hydraulic cylinder (31) is provided with a first upper chamber and a first lower chamber, said jacking hydraulic cylinder (32) is provided with a second upper chamber and a second lower chamber, said first upper chamber is connected with the second filter mechanism (12), said first lower chamber is connected with the first filter mechanism (11), said second lower chamber is connected with the third filter mechanism (13), and said second upper chamber is connected with the hydraulic system (2).

9. The heavy-duty oil cylinder system of the press machine as claimed in claim 8, wherein said hydraulic system (2) comprises an electromagnetic valve and an oil tank, said electromagnetic valve is connected with the oil tank, said first filtering mechanism (11), said second filtering mechanism (12) and said third filtering mechanism (13) are all connected with the electromagnetic valve, and said second upper chamber is connected with the oil tank.

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