Pump station of ceramic press

Abstract

The utility model relates to the technical field of hydraulic equipment, and discloses a pump station of a ceramic press, which comprises a main oil tank, an auxiliary oil tank, a control valve group, a circulating pump, a power pump group device and a filter, the control valve group is provided with a first oil port, a second oil port and a third oil port, the first oil port is communicated with the auxiliary oil tank, the second oil port and the third oil port are both communicated with the main oil tank, the auxiliary oil tank is connected with the filter, and the circulating pump is used for introducing oil in the main oil tank into the filter; the first oil port is communicated with the second oil port, and at least part of oil in the auxiliary oil tank returns to the main oil tank through the first oil port and the second oil port in sequence; or the first oil port is communicated with the third oil port, and oil in the main oil tank is introduced into the auxiliary oil tank through the third oil port and the first oil port in sequence; the power pump set device is connected with the auxiliary oil tank so as to provide oil liquid for the hydraulic terminal. According to the pump station of the ceramic press, invasion of pollutants to an oil system can be reduced, and the main oil pump is prevented from being damaged by the pollutants.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic equipment technical field especially relates to a pump station of ceramic press. BACKGROUND

[0002] Because the working environment of ceramic press belongs to heavy dust environment, therefore, the oil liquid of hydraulic system is extremely easy to be polluted, thereby leading to the failure of main oil pump.

[0003] In order to reduce the invasion of pollutant to oil liquid system, avoid the damage of pollutant to main oil pump, it is necessary to develop a pump station for ceramic press. UTILITY MODEL CONTENT

[0004] The utility model relates to a pump station of ceramic press, reduce the invasion of pollutant to oil liquid system, avoid the damage of pollutant to main oil pump.

[0005] In order to solve the above technical problems, the utility model provides a pump station of ceramic press, including main oil tank, auxiliary oil tank, control valve group, circulating pump, power pump group device and filter,

[0006] The control valve group is equipped with first oil port, second oil port and third oil port, the first oil port communicates with the auxiliary oil tank, the second oil port and the third oil port all communicate with the main oil tank, the auxiliary oil tank is connected with the filter, and the circulating pump is used to pass the oil liquid of the main oil tank into the filter;

[0007] The first oil port communicates with the second oil port, and at least part of the oil liquid of the auxiliary oil tank returns to the main oil tank in turn through the first oil port and the second oil port;

[0008] Or the first oil port communicates with the third oil port, and the oil liquid of the main oil tank passes into the auxiliary oil tank in turn through the third oil port and the first oil port;

[0009] The power pump group device is connected with the auxiliary oil tank to provide oil liquid to hydraulic terminal.

[0010] As the improvement of the above scheme, the control valve group includes first hydraulic control valve and second hydraulic control valve, the inlet of the first hydraulic control valve communicates with the outlet of the second hydraulic control valve and communicates with the auxiliary oil tank, the outlet of the first hydraulic control valve communicates with the second oil port, and the inlet of the second hydraulic control valve communicates with the third oil port.

[0011] As the improvement of the above scheme, the control valve group further includes electromagnetic valve and overflow valve, and the electromagnetic valve and overflow valve are connected with the remote pressure control port of the power pump group device.

[0012] As an improvement of the above scheme, the outlet of the overflow valve is communicated with the third oil port, the oil suction port of the circulating pump in sequence.

[0013] As an improvement of the above scheme, the third oil port is connected with the oil discharge port of the power pump set device.

[0014] As an improvement of the above scheme, the control valve set is further provided with a fourth oil port, the fourth oil port is connected with the remote pressure control port of the power pump set device, and is connected with the electromagnetic valve and the overflow valve in parallel.

[0015] As an improvement of the above scheme, the control valve set is further provided with a fifth oil port, the fifth oil port is connected with the flushing oil port of the power pump set device, and the fifth oil port is communicated with the inlet of the first hydraulic control valve, the outlet of the second hydraulic control valve and the auxiliary oil tank.

[0016] As an improvement of the above scheme, the auxiliary oil tank is further provided with a pressure gauge and a pressure relief valve, the pressure relief valve is arranged at the top of the auxiliary oil tank, and the pressure gauge is connected with the power pump set device.

[0017] As an improvement of the above scheme, a radiator is further arranged, the oil discharge port of the circulating pump and the filter are connected with the inlet of the radiator and the outlet of the radiator respectively.

[0018] The auxiliary oil tank is further provided with a temperature controller, and the temperature controller is connected with the power pump set device.

[0019] As an improvement of the above scheme, the power pump set device comprises a main oil pump and a main motor, the main motor is connected with the main oil pump, and the rated flow of the circulating pump is greater than the maximum flow of the main oil pump.

[0020] The utility model discloses, have following beneficial effect:

[0021] The utility model discloses a pump station of ceramic press, through setting up auxiliary oil tank, control valve group and circulating pump with filter, when circulating pump starts, the oil liquid in main oil tank enters auxiliary oil tank, and the filter of auxiliary oil tank sets up and supplies power pump set device after full flow filtration to system oil liquid, makes the execution system of hydraulic terminal obtain clean oil liquid, protects each execution element, and simultaneously, the oil pressure provided by circulating pump can make at least part oil liquid of auxiliary oil tank return main oil tank through first oil port second oil port, can ensure that oil liquid fully supplies power pump set device, when because of circulating pump failure or filter blockage etc. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the pump station for a ceramic press according to this utility model;

[0023] Figure 2 yes Figure 1 The corresponding top view of the pump station assembly structure;

[0024] Figure 3 yes Figure 1 Side view of the corresponding pump station assembly structure. Detailed Implementation

[0025] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0026] Figures 1 to 3 As shown, this utility model discloses an embodiment of a pump station for a ceramic press, including a main oil tank 1, an auxiliary oil tank 2, a control valve group 3, a circulating pump 4, a power pump group, and a filter 7; the control valve group 3 is provided with a first oil port a, a second oil port b, and a third oil port c. The first oil port a is connected to the auxiliary oil tank 2, and the second oil port b and the third oil port c are both connected to the main oil tank 1. The auxiliary oil tank 2 is connected to the filter 7. The circulating pump 4 is used to pass the oil from the main oil tank 1 into the filter 7; the first oil port a is connected to the second oil port b, and at least part of the oil from the auxiliary oil tank 2 returns to the main oil tank 1 sequentially through the first oil port a and the second oil port b; or the first oil port a is connected to the third oil port c, and the oil from the main oil tank 1 is sequentially passed into the auxiliary oil tank 2 through the third oil port c and the first oil port a; the power pump group is connected to the auxiliary oil tank 2 to provide oil to the hydraulic terminal.

[0027] This embodiment features an auxiliary oil tank 2, a control valve assembly 3, and a circulating pump 4 with a filter 7. When the circulating pump 4 starts, the oil in the main oil tank 1 enters the auxiliary oil tank 2. The filter 7 in the auxiliary oil tank 2 filters the system oil at full flow before supplying it to the power pump unit, ensuring that the hydraulic terminal's execution system receives clean oil and protecting the various actuators. Simultaneously, the oil pressure provided by the circulating pump 4 allows at least a portion of the oil in the auxiliary oil tank 2 to return to the main oil tank 1 through the first oil port a and the second oil port b, ensuring a sufficient supply of oil to the power pump unit. When the pressure of the medium in the auxiliary oil tank 2 decreases due to a malfunction of the circulating pump 4 or blockage of the filter 7, and the oil in it is insufficient to supply the power pump unit, the first oil port a and the third oil port c of the control valve assembly 3 are connected, allowing the oil in the main oil tank 1 to flow into the auxiliary oil tank 2 sequentially through the third oil port c and the first oil port a. This timely replenishment of the oil in the auxiliary oil tank 2 prevents the power pump unit from sucking in air and protects the normal operation of the power pump unit.

[0028] Specifically, the power pump set device of the embodiment comprises a main oil pump 5 and a main motor 6, the main motor 6 is connected with the main oil pump 5, the main oil pump 5 is preferably a constant pressure and constant power variable pump, and the main oil pump 5 is provided with a flushing oil port, a remote pressure control port, an oil suction port and an oil discharge port. The oil suction port of the main oil pump 5 is connected with the auxiliary oil tank 2, and the rated flow of the circulating pump 4 is greater than the maximum flow of the main oil pump 5, so as to ensure that, in a normal working state, the oil liquid delivered by the circulating pump 4 to the auxiliary oil tank 2 can fully supply the power pump set device.

[0029] The auxiliary oil tank 2 of the embodiment is preferably a closed pressurized auxiliary oil tank 2, which helps to solve the problem of external pollutants invading the system. The filter 7 of the embodiment is installed on the auxiliary oil tank 2. In addition, the auxiliary oil tank 2 of the embodiment is also provided with a gas release valve 21 and a pressure gauge 22. The gas release valve 21 is arranged at the top of the auxiliary oil tank 2, when the circulating pump 4 is started, the auxiliary oil tank 2 is quickly filled with oil liquid, the residual compressed air in the auxiliary oil tank 2 is extruded to the top, the gas release valve 21 is opened to discharge the air, after the air is discharged, the gas release valve 21 is closed again to prevent air from being sucked in when the main oil pump 5 is started. The pressure gauges 22 are connected with the power pump set device. The pressure gauges 22 are preferably electric contact pressure gauges 22, which are installed on the auxiliary oil tank 2, can measure the pressure of the oil liquid in the auxiliary oil tank 2 and judge whether the oil pressure reaches the starting condition of the main oil pump 5. When the oil pressure monitored by the electric contact pressure gauge 22 reaches the starting condition of the main oil pump 5, the control circuit is turned on, and the main oil pump 5 is automatically controlled to start.

[0030] The control valve group 3 is arranged at the end or side wall of the auxiliary oil tank 2. The control valve group 3 comprises a first hydraulic control valve 31 and a second hydraulic control valve 32, the inlet A1 of the first hydraulic control valve 31 is communicated with the outlet B2 of the second hydraulic control valve 32 and the auxiliary oil tank 2 at the same time; the outlet B1 of the first hydraulic control valve 31 is communicated with the second oil port b, that is, the outlet B1 of the first hydraulic control valve 31 is communicated with the main oil tank 1, and the inlet A2 of the second hydraulic control valve 32 is communicated with the third oil port c, that is, the inlet A2 of the second hydraulic control valve 32 is communicated with the main oil tank 1. The first hydraulic control valve 31 and the second hydraulic control valve 32 are preferably two-way cartridge valves. The first hydraulic control valve 31 can discharge oil to the system main oil tank 1 when the pressure in the auxiliary oil tank 2 rises, so as to keep the pressure of the auxiliary oil tank 2 stable, and the second hydraulic control valve 32 allows the oil liquid of the main oil tank 1 to directly supplement into the auxiliary oil tank 2 when the pressure of the auxiliary oil tank 2 decreases and the oil volume is insufficient, so as to prevent the main oil pump 5 from sucking air. Specifically, when the oil liquid of the main oil tank 1 is introduced into the filter 7 by the circulating pump 4 and the oil liquid fills the auxiliary oil tank 2, the first oil port a and the second oil port b are communicated, at this time, at least part of the oil liquid in the auxiliary oil tank 2 returns to the main oil tank 1 through the first oil port a and the second oil port b; when the hydraulic pressure in the auxiliary oil tank 2 decreases to a preset value, the first oil port a and the third oil port c are communicated, and the oil liquid of the main oil tank 1 is introduced into the auxiliary oil tank 2 through the third oil port c and the first oil port a in turn.

[0031] When the hydraulic terminal's execution system requires large flow, the main oil pump 5 outputs maximum flow, most of the oil provided by the circulating pump 4 is supplied to the main oil pump 5, and a little surplus part is returned to the system main oil tank 1 through the first hydraulic control valve 31; when the main oil pump 5 reaches the constant pressure and constant power point, the output flow is greatly reduced, most of the oil provided by the circulating pump 4 is returned to the system main oil tank 1 through the first hydraulic control valve 31, preventing the pressure of the auxiliary oil tank 2 from being too high and causing damage to the main oil pump 5.

[0032] The oil suction port of the circulating pump 4 is connected with the main oil tank 1, and the second oil port b is preferably connected with the main oil tank 1 and the oil suction port of the circulating pump 4 at the same time, so as to simplify the oil circuit connection structure.

[0033] The control valve group 3 is further provided with a fifth oil port e connected with the flushing oil port of the power pump group device, and the fifth oil port e is communicated with the inlet A1 of the first hydraulic control valve 31, the outlet B2 of the second hydraulic control valve 32 and the auxiliary oil tank 2, and the circulating pump 4 is started to realize flushing of the power pump group device.

[0034] The control valve group 3 further comprises an electromagnetic valve 33 and a relief valve 34, both of which are connected with the remote pressure control port of the power pump group device. Specifically, the control valve group 3 is further provided with a fourth oil port d connected with the remote pressure control port of the power pump group device, and the fourth oil port d is connected with the electromagnetic valve 33 and the relief valve 34 in parallel. The relief valve 34 is used to set the output pressure of the main oil pump 5, and the electromagnetic valve 33 is used to control the starting pressure and pressure relief of the main oil pump 5.

[0035] The outlet B4 of the relief valve 34 and the outlet B3 of the electromagnetic valve 33 are sequentially communicated with the third oil port c and the oil suction port of the circulating pump 4. When the circulating pump 4 is normally working, the liquid oil overflowed from the outlet of the relief valve 34 is introduced into the auxiliary oil tank 2 by the circulating pump 4 to form a circulation; when the circulating pump 4 fails or the filter 7 is blocked, the liquid oil overflowed from the outlet of the relief valve 34 is introduced into the main oil tank 1 from the third oil port c to form a circulation. The third oil port c is connected with the oil drain port of the power pump group device, and the liquid oil flowing out of the oil drain port of the power pump group device can be returned to the main oil tank 1 from the third oil port c through the auxiliary oil tank 2.

[0036] In addition, the embodiment further provides a radiator 8 between the auxiliary oil tank 2 and the circulating pump 4, and the oil outlet of the circulating pump 4 and the filter 7 are respectively connected with the inlet and outlet of the radiator 8. The oil is cooled by the radiator 8 and then introduced into the filter 7 in the auxiliary oil tank 2, and the filtered and cooled oil enters the power pump group device.

[0037] The auxiliary oil tank 2 is also provided with a temperature controller 23 connected with the power pump group device. The temperature controller 23 is installed on the auxiliary oil tank 2 and used to determine whether the oil temperature reaches the starting condition of the main oil pump 5. When the oil pressure monitored by the electric contact pressure gauge 22 reaches the starting condition of the main oil pump 5 and the oil temperature monitored by the temperature controller 23 reaches the starting condition of the main oil pump 5, both of them send signals to turn on the control circuit to automatically control the starting of the main oil pump 5.

[0038] After the circulating pump 4 is started, the pressure in the auxiliary oil tank 2 is greater than the system pressurized air pressure, the second hydraulic control valve 32 in the control valve group 3 is closed, and the first hydraulic control valve 31 will be opened after reaching the opening pressure. The oil in the auxiliary oil tank 2 can only flow to the system main oil tank 1 in one direction. The unfiltered and uncooled oil in the system cannot enter the auxiliary oil tank 2, and the auxiliary oil tank 2 will obtain completely filtered and cooled oil.

[0039] When the circulating pump 4 fails to stop or the radiator 8 and the filter 7 are blocked, the oil cannot be fully supplied to the main oil pump 5. At this time, the pressure in the auxiliary oil tank 2 decreases, and when it reaches the set lower limit, the electric contact pressure gauge 22 is triggered to send a signal to stop the main motor 6. At the same time, due to the decrease of the pressure in the auxiliary oil tank 2, the second hydraulic control valve 32 in the control valve group 3 is opened, so that the oil in the system main oil tank 1 can be supplemented into the auxiliary oil tank 2, avoiding the main oil pump 5 from being empty before the main motor 6 completely stops, thereby protecting the main oil pump 5.

[0040] The pump station operation process of the embodiment is as follows:

[0041] First, the circulating pump 4 is started, the auxiliary oil tank 2 is quickly filled with oil, the residual compressed air in it is squeezed to the top, the air release valve 21 is opened to discharge this part of air, and after the air is discharged, the air release valve 21 is closed again.

[0042] At this time, the pressure in the auxiliary oil tank 2 is greater than the system pressurized air pressure, the second hydraulic control valve 32 in the control valve group 3 is closed, and the first hydraulic control valve 31 will be opened after reaching the opening pressure. The oil in the auxiliary oil tank 2 can only flow to the system main oil tank 1 in one direction. The unfiltered and uncooled oil in the system cannot enter the auxiliary oil tank 2, and the auxiliary oil tank 2 will obtain completely filtered and cooled oil. At the same time, the electromagnetic valve 33 in the control valve group 3 is powered on, and the main oil pump 5 outputs the flow according to the pressure set by the overflow valve 34.

[0043] When the circulating pump 4 fails to stop or the radiator 8 and the filter 7 are blocked, the oil cannot be fully supplied to the main oil pump 5. At this time, the pressure in the auxiliary oil tank 2 decreases, and when it reaches the set lower limit, the electric contact pressure gauge 22 is triggered to send a signal to stop the main motor 6. At the same time, due to the decrease of the pressure in the auxiliary oil tank 2, the second hydraulic control valve 32 in the control valve group 3 is opened, so that the oil in the system main oil tank 1 can be supplemented into the auxiliary oil tank 2, avoiding the main oil pump 5 from being empty before the main motor 6 completely stops, thereby protecting the main oil pump 5.

[0044] The utility model discloses a pump station adopts closed type pressurization auxiliary oil tank, help to solve the problem of the invasion of external pollutants, adopts circulating pump full -flow oil supply, avoids the pollution problem of main oil pump oil suction passage process, sets up control valve group, avoids the risk of the damage of main oil pump caused by the failure of a part in full -flow oil supply, simultaneously avoids the risk problem of the damage of main oil pump caused by the pressure rise of oil suction port after the displacement reduction of main oil pump in full -flow oil supply, the utility model discloses can reduce the invasion rate of pollutant to oil system from the root, and simultaneously has main oil pump protection valve group, can prevent the damage of main oil pump.

[0045] The above only discloses a preferred embodiment of the utility model, and of course cannot limit the right scope of the utility model, so equivalent changes made according to the utility model claims still belong to the range covered by the utility model.

Claims

1. A pump station for a ceramic press, characterized in that, The device comprises a main oil tank, a secondary oil tank, a control valve group, a circulating pump, a power pump group device, and a filter. The control valve group is provided with a first oil port, a second oil port and a third oil port, the first oil port is communicated with the secondary oil tank, the second oil port and the third oil port are both communicated with the main oil tank, the secondary oil tank is connected with the filter, and the circulating pump is used for passing the oil liquid in the main oil tank into the filter. The first oil port is communicated with the second oil port, and at least part of the oil liquid in the secondary oil tank is returned to the main oil tank in sequence through the first oil port and the second oil port. Or the first oil port is communicated with the third oil port, and the oil liquid in the main oil tank is passed into the secondary oil tank in sequence through the third oil port and the first oil port. The power pump group device is connected with the secondary oil tank to provide oil liquid for a hydraulic terminal.

2. The pump station for a ceramic press as claimed in claim 1, characterized in that The control valve group comprises a first hydraulic control valve and a second hydraulic control valve, the inlet of the first hydraulic control valve is communicated with the outlet of the second hydraulic control valve, and the inlet of the first hydraulic control valve and the outlet of the second hydraulic control valve are both communicated with the secondary oil tank; the outlet of the first hydraulic control valve is communicated with the second oil port, and the inlet of the second hydraulic control valve is communicated with the third oil port.

3. The pump station for a ceramic press as claimed in claim 2, wherein, The control valve group further comprises a solenoid valve and a relief valve, and the solenoid valve and the relief valve are both connected with a remote pressure control port of the power pump group device.

4. The pump station for a ceramic press as claimed in claim 3, wherein, The outlet of the relief valve is communicated with the third oil port and the oil suction port of the circulating pump in sequence.

5. A pump station for a ceramic press as claimed in claim 1 or 4, characterized in that The third oil port is connected with a drain port of the power pump group device.

6. The pump station for a ceramic press as claimed in claim 3, wherein, The control valve group is further provided with a fourth oil port, the fourth oil port is connected with the remote pressure control port of the power pump group device, and is connected with the solenoid valve and the relief valve in parallel.

7. The pump station for a ceramic press as recited in claim 2 wherein, The control valve group is further provided with a fifth oil port, the fifth oil port is connected with a flushing oil port of the power pump group device, and the fifth oil port is communicated with the inlet of the first hydraulic control valve, the outlet of the second hydraulic control valve and the secondary oil tank.

8. The pump station for a ceramic press as recited in claim 1 wherein, The secondary oil tank is further provided with a pressure gauge and a pressure relief valve, the pressure relief valve is arranged at the top of the secondary oil tank, and the pressure gauge is connected with the power pump group device.

9. The pump station for a ceramic press as recited in claim 1 wherein, The device further comprises a radiator, and the oil discharge port of the circulating pump and the filter are respectively connected with the inlet of the radiator and the outlet of the radiator. The secondary oil tank is further provided with a temperature controller, and the temperature controller is connected with the power pump group device.

10. The pump station for a ceramic press as recited in claim 1 wherein, The power pump group device comprises a main oil pump and a main motor, the main motor is connected with the main oil pump, and the rated flow of the circulating pump is greater than the maximum flow of the main oil pump.

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