Shaftless Paper Stand Hydraulic Station

Abstract

The present invention relates to a shaftless paper holder hydraulic station, belonging to the field of shaftless paper holder hydraulic stations. The technical solution adopted by the present invention is as follows: It includes an oil tank, a hydraulic pump, an integrated oil circuit block, multiple groups of hydraulic cylinders, and multiple three-position four-way electromagnetic directional control valves connected through hydraulic pipelines. The hydraulic cylinders and the three-position four-way electromagnetic directional control valves are connected to the oil inlet and outlet ports of the integrated oil circuit block, and multiple P ports and multiple T ports are provided on the integrated oil circuit block; the hydraulic cylinders include at least a pair of interconnected hydraulic cylinders and two separate hydraulic cylinders, and the three-position four-way electromagnetic directional control valves include at least a pair of interconnected M-type three-position four-way solenoid valves and O-type three-position four-way solenoid valves, as well as two Y-type three-position four-way solenoid valves. The shaftless paper holder hydraulic station of the present invention is an improvement on the original shaftless support hydraulic system, and the purpose of reducing control valves is achieved through a reasonable integrated oil circuit block structure, realizing cost reduction. Through the synchronous design of the oil circuit, the oil in the two oil cylinder chambers is exchanged with the least number of valves. Since the cross-sectional areas of the oil cylinders are the same, the synchronous effect remains unchanged.

Description

Technical Field

[0001] The present invention relates to a shaftless paper rack hydraulic station, belonging to the field of shaftless paper rack hydraulic stations. Background Art

[0002] The shaftless paper rack hydraulic station is an indispensable device for the operation of many mechanical equipment. The shaftless paper rack hydraulic station provides pressurized oil for power equipment such as hydraulic cylinders to obtain power output.

[0003] The existing shaftless paper rack hydraulic station realizes the control of externally output high-pressure oil through various control valves. The number and control connection relationship of the control valves determine the cost of the shaftless paper rack hydraulic station. In order to minimize the impact on the output of hydraulic oil, it is necessary to improve the structure of the integrated oil circuit block and the connection relationship of the control valves to reduce the cost of the equipment. Summary of the Invention

[0004] The present invention provides a shaftless paper rack hydraulic station, which realizes the hydraulic output effect with as few control valve components as possible.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A shaftless paper rack hydraulic station, including an oil tank, a hydraulic pump, an integrated oil circuit block, multiple groups of hydraulic cylinders, and multiple three-position four-way electromagnetic reversing valves connected through hydraulic pipelines. The hydraulic cylinders and the three-position four-way electromagnetic reversing valves are connected to the oil inlet and outlet ports of the integrated oil circuit block. The integrated oil circuit block is provided with multiple P ports and multiple T ports;

[0007] The hydraulic cylinder includes at least a pair of interconnected hydraulic cylinders and two separate hydraulic cylinders. The three-position four-way electromagnetic reversing valve includes at least a pair of interconnected M-type three-position four-way solenoid valves and O-type three-position four-way solenoid valves, and two Y-type three-position four-way solenoid valves;

[0008] The A port of the M-type three-position four-way solenoid valve is connected to the P port of the integrated oil circuit block, the B port is connected to the T port of the integrated oil circuit block, the T port of the M-type three-position four-way solenoid valve is connected to the A port of the interconnected left hydraulic cylinder in the interconnected hydraulic cylinders, and the T port of the M-type three-position four-way solenoid valve is connected to the A port of the interconnected right hydraulic cylinder in the interconnected hydraulic cylinders through a first branch pipeline;

[0009] The A port of the O-type three-position four-way solenoid valve is connected to the first branch pipeline, the B port is respectively connected to the B ports of the interconnected left hydraulic cylinder and the interconnected right hydraulic cylinder through a second branch pipeline. The P port of the O-type three-position four-way solenoid valve is connected to the P port of the integrated oil circuit block, the T port of the O-type three-position four-way solenoid valve is connected to the T port of the integrated oil circuit block, and the two pipelines connecting the P port and the T port of the integrated oil circuit block are respectively connected to both ends of the overflow valve;

[0010] The A port of the Y-type three-position four-way solenoid valve is connected to the A port of a separate hydraulic cylinder, the B port of the Y-type three-position four-way solenoid valve is connected to the B port of a separate hydraulic cylinder, the P port of the Y-type three-position four-way solenoid valve is connected to the P port of the integrated oil circuit block, and the T port of the Y-type three-position four-way solenoid valve is connected to the T port of the integrated oil circuit block.

[0011] Preferably, the integrated oil circuit block is provided with a P-port oil passage and a T-port oil passage. The P-port oil passage is provided with a P-port oil inlet and a T-port oil outlet at one end of the integrated oil circuit block, and a plurality of P ports and a plurality of T ports on the side surface of the integrated oil circuit block;

[0012] Preferably, throttle valves and pilot-operated check valves are respectively connected in series on the two pipelines where the A port and the B port of the Y-type three-position four-way solenoid valve are connected to the hydraulic cylinder. The pilot-operated pipeline of the pilot-operated check valve is connected to the pipeline where another pilot-operated check valve is located.

[0013] Preferably, the interconnected M-type three-position four-way solenoid valve and O-type three-position four-way solenoid valve are in a group, and the shaftless paper rack hydraulic station has two groups, which are respectively located on both sides of the two Y-type three-position four-way solenoid valves and are symmetrically arranged.

[0014] Preferably, the P-port oil inlet of the integrated oil circuit block is connected to one of the joints of the three-way joint, the other is connected with a pressure gauge, the third structure is connected to the high-pressure hydraulic oil pipeline, and a check valve, a hydraulic pump and an oil suction filter are connected in series on the high-pressure hydraulic oil pipeline in the direction of the fuel tank, and finally it is led into the fuel tank. The T-port oil outlet of the integrated oil circuit block is connected to the return oil pipeline, and the return oil pipeline is led into the fuel tank. An oil temperature and oil level gauge is provided in the fuel tank, and an air filter is provided on the air vent connecting the fuel tank to the outside.

[0015] Preferably, the fuel tank is arranged in the housing. An in-shaft motor for driving the hydraulic pump is arranged on the upper part of the housing. The pressure gauge and the oil temperature and oil level gauge are arranged on the side surface of the housing, and the air filter is arranged on the upper side surface of the housing.

[0016] Preferably, the integrated oil circuit block is arranged on the upper side surface of the housing. There are six placement positions on the integrated oil circuit block. The arrangement order is as follows: the M-type three-position four-way solenoid valve is placed in the first position starting from the left of the integrated oil circuit block, the O-type three-position four-way solenoid valve is placed in the second position, the Y-type three-position four-way solenoid valve is placed in the third position, and a throttle valve and a pilot-operated check valve are respectively stacked below it. The Y-type three-position four-way solenoid valve is placed in the fourth position, and a throttle valve and a pilot-operated check valve are stacked below it. The O-type three-position four-way solenoid valve is placed in the fifth position, and a relief valve is stacked below it. The M-type three-position four-way solenoid valve is placed in the sixth position.

[0017] Preferably, the relief valve is placed below the O-type three-position four-way solenoid valve in the second position.

[0018] The hydraulic station of the shaftless paper rack of the present invention is an improvement on the original hydraulic system of the shaftless support. By setting a reasonable integrated oil circuit block structure, the purpose of reducing the control valves is achieved, and the cost is reduced. Through the synchronous design of the oil circuit, the oil in the two cylinder chambers is interchanged with the least number of valves, and the synchronous effect remains unchanged because the cross-sectional areas of the cylinders are the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the hydraulic connection diagram of the present invention,

[0020] Figure 2 is the oil circuit connection diagram of the present invention,

[0021] Figure 3 is the external structure diagram of the housing of the present invention.

[0022] Reference numerals in the drawings: 1, integrated oil circuit block; 2, M-type three-position four-way solenoid valve; 3, O-type three-position four-way solenoid valve; 4, Y-type three-position four-way solenoid valve; 5, first branch pipeline; 6, interconnected left hydraulic cylinder; 7, interconnected right hydraulic cylinder; 8, lifting hydraulic cylinder; 9, P-port oil passage; 10, T-port oil passage; 11, overflow valve; 12, throttle valve; 13, hydraulic control check valve; 14, three-way joint; 15, pressure gauge; 16, check valve; 17, hydraulic pump; 18, housing; 19, oil suction filter screen; 20, oil temperature and oil level gauge; 21, fuel tank; 22, in-shaft motor; 23, air filter; 24, second branch pipeline. DETAILED DESCRIPTION OF THE INVENTION

[0023] The specific structure of the present invention will be further described below:

[0024] The hydraulic station of the shaftless paper rack of the present invention has a structure as shown in Figure 1 and Figure 2 , and includes a fuel tank, a hydraulic pump, an integrated oil circuit block 1, multiple groups of hydraulic cylinders, and multiple three-position four-way electromagnetic reversing valves connected through hydraulic pipelines. The hydraulic cylinders and the three-position four-way electromagnetic reversing valves are connected to the oil inlet and outlet ports of the integrated oil circuit block 1, and multiple P-ports and multiple T-ports are provided on the integrated oil circuit block 1.

[0025] The three-position four-way electromagnetic reversing valves include two pairs of interconnected M-type three-position four-way solenoid valves 2 and O-type three-position four-way solenoid valves 3, and two Y-type three-position four-way solenoid valves 4. The hydraulic cylinders include two groups of interconnected left interconnected hydraulic cylinders, right interconnected hydraulic cylinders, and two lifting hydraulic cylinders.

[0026] As shown in Figure 2 and Figure 3 , the fuel tank is arranged inside the housing. An in-shaft motor for driving the hydraulic pump is arranged on the upper part of the housing, the pressure gauge 15 and the oil temperature and oil level gauge are arranged on the side surface of the housing, and the air filter is arranged on the upper side surface of the housing.

[0027] An integrated oil circuit block 1 is provided on the upper side of the housing. There are six placement positions on the integrated oil circuit block 1. In the arrangement order, starting from the left side of the integrated oil circuit block 1, the first position places the M-type three-position four-way solenoid valve 2, the second position places the O-type three-position four-way solenoid valve 3, the third position places the Y-type three-position four-way solenoid valve 4, and a throttle valve 12 and a hydraulic control check valve 13 are respectively stacked below it. The fourth position places the Y-type three-position four-way solenoid valve 4, and a throttle valve 12 and a hydraulic control check valve 13 are stacked below it. The fifth position places the O-type three-position four-way solenoid valve 3, and a relief valve 11 is stacked below it. The sixth position places the M-type three-position four-way solenoid valve 2.

[0028] The specific connection relationships of each solenoid valve are as Figure 1 shown. The A port of the M-type three-position four-way solenoid valve 2 is connected to the P port of the integrated oil circuit block 1, the B port is connected to the T port of the integrated oil circuit block 1, the T port of the M-type three-position four-way solenoid valve 2 is connected to the A port of the interconnected left hydraulic cylinder 6 in the interconnected hydraulic cylinder, and the T port of the M-type three-position four-way solenoid valve 2 is connected to the A port of the interconnected right hydraulic cylinder 7 in the interconnected hydraulic cylinder through the first branch pipeline 5.

[0029] The A port of the O-type three-position four-way solenoid valve 3 is connected to the first branch pipeline 5, the B port is respectively connected to the B port of the interconnected left hydraulic cylinder 6 and the B port of the interconnected right hydraulic cylinder 7 through the second branch pipeline. The P port of the O-type three-position four-way solenoid valve 3 is connected to the P port of the integrated oil circuit block 1, the T port of the O-type three-position four-way solenoid valve 3 is connected to the T port of the integrated oil circuit block 1, and the two pipelines connecting the P port and the T port of the integrated oil circuit block 1 are respectively connected to both ends of the relief valve 11.

[0030] The A port of the Y-type three-position four-way solenoid valve 4 is connected to the A port of a lifting hydraulic cylinder 8, the B port of the Y-type three-position four-way solenoid valve 4 is connected to the B port of a separate hydraulic cylinder, the P port of the Y-type three-position four-way solenoid valve 4 is connected to the P port of the integrated oil circuit block 1, and the T port of the Y-type three-position four-way solenoid valve 4 is connected to the T port of the integrated oil circuit block 1.

[0031] The integrated oil circuit block 1 is as Figure 1 shown. It is internally provided with a P-port oil passage 9 and a T-port oil passage 10. The P-port oil passage 9 is provided with a P-port oil inlet and a T-port oil outlet at one end of the integrated oil circuit block 1, and a plurality of P ports and a plurality of T ports on the side surface of the integrated oil circuit block 1.

[0032] Throttle valves 12 and hydraulic control check valves 13 are respectively connected in series on the two pipelines where the A port and the B port of the Y-type three-position four-way solenoid valve 4 are connected to the hydraulic cylinders, and the hydraulic control pipeline of the hydraulic control check valve 13 is connected to the pipeline where another hydraulic control check valve 13 is located.

[0033] The P-port oil inlet of the integrated oil circuit block 1 is connected to one of the joints of the three-way joint 14, another is connected to the pressure gauge 15, and the third structure is connected to the high-pressure hydraulic oil pipeline. A check valve 16, a hydraulic pump, and an oil suction filter are connected in series on the high-pressure hydraulic oil pipeline in the direction of the fuel tank, and finally, it is led into the fuel tank. The T-port oil outlet of the integrated oil circuit block 1 is connected to the return oil pipeline, and the return oil pipeline is led into the fuel tank. An oil temperature and oil level gauge is provided in the fuel tank, and an air filter is provided on the vent port where the fuel tank is connected to the outside. The installation position of the overflow valve 11 can also be changed to below the O-type three-position four-way solenoid valve 3 in the second position.

[0034] The working process of the shaftless paper stand hydraulic station of the present invention:

[0035] Working condition: When the in-shaft motor is energized to drive the hydraulic pump to suck oil from the fuel tank through the oil suction filter, and then enter the three-way joint through the check valve. One end of the three-way joint is connected to the pressure gauge, and the pressure gauge shows the current hydraulic pressure. The other end enters the P-port oil passage of the integrated oil circuit block through the P-port oil inlet. The P-port oil passage leads the high-pressure oil to the A-port of the M-type three-position four-way solenoid valve, the P-port of the O-type three-position four-way solenoid valve, and the P-port of the Y-type three-position four-way solenoid valve.

[0036] An overflow valve system for overflow protection is provided on the pipeline where the P-port of a group of O-type three-position four-way solenoid valves is connected to the P-port oil passage of the integrated oil circuit block.

[0037] When the electromagnet 1CT of the Y-type three-position four-way solenoid valve is energized, the hydraulic oil exits through the A-port, passes through the one-way throttle valve, and then enters the A-port of the pilot-operated check valve, and opens the B-port side of the pilot-operated check valve to enter the rod chamber of the lifting hydraulic cylinder. The hydraulic oil in the rodless chamber of the lifting hydraulic cylinder passes through the B-port of the pilot-operated check valve, and then through the one-way throttle valve for regulating return oil throttle speed control, and returns to the T-port oil passage through the B-port of the reversing valve. When the Y-type three-position four-way solenoid valve does not work, the pilot-operated check valve immediately locks the oil circuit of the lifting hydraulic cylinder to achieve long-term pressure holding.

[0038] When the electromagnet 2CT of the Y-type three-position four-way solenoid valve is energized, the hydraulic oil exits through the B-port, passes through the one-way throttle valve, and then enters the B-port of the pilot-operated check valve, and opens the A-port side of the pilot-operated check valve to enter the rodless chamber of the lifting hydraulic cylinder. The hydraulic oil in the rod chamber of the cylinder passes through the A-port of the pilot-operated check valve, and then through the one-way throttle valve for regulating return oil throttle speed control.

[0039] When the Y-type three-position four-way solenoid valve does not work, the pilot-operated check valve immediately locks the oil circuit of the cylinder to achieve long-term pressure holding. The working principles of the two lifting hydraulic cylinders are the same.

[0040] When the electromagnet 5CT of the O-type three-position four-way solenoid valve is energized, the pressure oil is divided into two paths through port B and enters the rod chambers of the two interconnected hydraulic cylinders respectively. The hydraulic oil in the rodless chambers of the interconnected hydraulic cylinders returns to the oil tank through port A of the O-type three-position four-way solenoid valve via the M-type three-position four-way electromagnetic directional valve 2 and the integrated oil circuit block. The hydraulic oil in the rodless chambers of the interconnected hydraulic cylinders returns to the oil tank through the integrated oil circuit block and then through port A of the O-type three-position four-way solenoid valve, realizing rod retraction and clamping. When de-energized, all oil ports are closed.

[0041] When the electromagnet 6CT of the O-type three-position four-way solenoid valve is energized, the pressure oil is divided into two paths through port A, and one path enters the rodless chambers of the two interconnected hydraulic cylinders. The hydraulic oil in the rod chambers of the two interconnected hydraulic cylinders returns to the oil tank through port B of the O-type three-position four-way solenoid valve, realizing rod extension and loosening. When de-energized, all oil ports are closed.

[0042] When the electromagnet 7CT of the M-type three-position four-way solenoid valve is energized, the pressure oil enters the rodless chamber of the interconnected hydraulic cylinder from port P to make its rod extend. The hydraulic oil in the rod chamber enters the rod chamber of the interconnected hydraulic cylinder through the integrated oil circuit block. The hydraulic oil in the rodless chamber of the interconnected hydraulic cylinder returns to the oil tank through port B of the M-type three-position four-way solenoid valve via the integrated oil circuit block, realizing synchronous rightward movement. When the electromagnet 8CT of the M-type three-position four-way solenoid valve is energized, the pressure oil enters the rodless chamber of the interconnected hydraulic cylinder from port T to make its rod extend. The hydraulic oil in the rod chamber enters the rod chamber of the interconnected hydraulic cylinder through the integrated oil circuit block. The hydraulic oil in the rodless chamber of the interconnected hydraulic cylinder returns to the oil tank through port B of the M-type three-position four-way solenoid valve via the integrated oil circuit block, realizing synchronous leftward movement.

Claims

1. A shaftless paper rack hydraulic station, comprising an oil tank, a hydraulic pump, an integrated oil circuit block (1), multiple groups of hydraulic cylinders, and multiple three-position four-way electromagnetic directional control valves connected through hydraulic pipelines. The hydraulic cylinders and the three-position four-way electromagnetic directional control valves are connected to the oil inlet and outlet ports of the integrated oil circuit block (1). The integrated oil circuit block (1) is provided with multiple P ports and multiple T ports; It is characterized in that the hydraulic cylinder includes at least a pair of interconnected left interconnected hydraulic cylinders, right interconnected hydraulic cylinders and two lifting hydraulic cylinders, and the three-position four-way electromagnetic directional control valve includes at least a pair of interconnected M-type three-position four-way solenoid valves (2) and O-type three-position four-way solenoid valves (3), and two Y-type three-position four-way solenoid valves (4); The A port of the M-type three-position four-way solenoid valve (2) is connected to the P port of the integrated oil circuit block (1), the B port is connected to the T port of the integrated oil circuit block (1), the T port of the M-type three-position four-way solenoid valve (2) is connected to the A port of the left interconnected hydraulic cylinder (6) in the interconnected hydraulic cylinder, and the P port of the M-type three-position four-way solenoid valve (2) is connected to the A port of the right interconnected hydraulic cylinder (7) in the interconnected hydraulic cylinder through the first branch pipeline (5). The A port of the O-type three-position four-way solenoid valve (3) is connected to the first branch pipeline (5), the B port is respectively connected to the B ports of the left interconnected hydraulic cylinder (6) and the right interconnected hydraulic cylinder (7) through the second branch pipeline. The P port of the O-type three-position four-way solenoid valve (3) is connected to the P port of the integrated oil circuit block (1), the T port of the O-type three-position four-way solenoid valve (3) is connected to the T port of the integrated oil circuit block (1), and the two pipelines connecting the P port and the T port of the integrated oil circuit block (1) are respectively connected to both ends of the relief valve (11). The A port of the Y-type three-position four-way solenoid valve (4) is connected to the A port of a lifting hydraulic cylinder (8), the B port of the Y-type three-position four-way solenoid valve (4) is connected to the B port of a separate hydraulic cylinder, the P port of the Y-type three-position four-way solenoid valve (4) is connected to the P port of the integrated oil circuit block (1), the T port of the Y-type three-position four-way solenoid valve (4) is connected to the T port of the integrated oil circuit block (1). The interconnected M-type three-position four-way solenoid valve (2) and O-type three-position four-way solenoid valve (3) are in a group. This shaftless paper rack hydraulic station is provided with two groups, which are respectively on both sides of the two Y-type three-position four-way solenoid valves (4) and are symmetrically arranged; The integrated oil circuit block (1) is internally provided with a P port oil passage (9) and a T port oil passage (10). The P port oil passage (9) is provided with a P port oil inlet and a T port oil outlet at one end of the integrated oil circuit block (1), and multiple P ports and multiple T ports on the side surface of the integrated oil circuit block (1).

2. The shaftless paper rack hydraulic station according to claim 1, characterized in that, Throttle valves (12) and hydraulic control one-way valves (13) are respectively connected in series on the two pipelines where the A port and the B port of the Y-type three-position four-way solenoid valve (4) are connected to the hydraulic cylinder. The hydraulic control pipeline of the hydraulic control one-way valve (13) is connected to the pipeline where another hydraulic control one-way valve (13) is located.

3. The shaftless paper stand hydraulic station according to claim 2, characterized in that, The P-port inlet of the integrated oil circuit block (1) is connected to one of the joints of the three-way joint (14), another is connected to a pressure gauge (15), and the third structure is connected to the high-pressure hydraulic oil pipeline. A check valve (16), a hydraulic pump, and an oil suction filter are connected in series on the high-pressure hydraulic oil pipeline in the direction of the fuel tank, and finally lead into the fuel tank. The T-port outlet of the integrated oil circuit block (1) is connected to the return oil pipeline, and the return oil pipeline leads into the fuel tank. An oil temperature and oil level gauge is provided in the fuel tank, and an air filter is provided on the vent port where the fuel tank communicates with the outside.

4. The shaftless paper stand hydraulic station according to claim 3, characterized in that, The fuel tank is arranged inside the housing. An in-shaft motor for driving the hydraulic pump is arranged on the upper part of the housing. The pressure gauge (15) and the oil temperature and oil level gauge are arranged on the side surface of the housing, and the air filter is arranged on the upper side surface of the housing.

5. The shaftless paper rack hydraulic station according to claim 4, characterized in that The integrated oil circuit block (1) is arranged on the upper side surface of the housing. There are six placement positions on the integrated oil circuit block (1). In the arrangement order, starting from the left side of the integrated oil circuit block (1), the first position is for the M-type three-position four-way solenoid valve (2), the second position is for the O-type three-position four-way solenoid valve (3), the third position is for the Y-type three-position four-way solenoid valve (4), and a throttle valve (12) and a pilot-operated check valve (13) are respectively stacked below it. The fourth position is for the Y-type three-position four-way solenoid valve (4), and a throttle valve (12) and a pilot-operated check valve (13) are stacked below it. The fifth position is for the O-type three-position four-way solenoid valve (3), and a relief valve (11) is stacked below it. The sixth position is for the M-type three-position four-way solenoid valve (2).

6. The shaftless paper rack hydraulic station according to claim 5, characterized in that, The relief valve (11) is placed below the O-type three-position four-way solenoid valve (3) at the second position.

Images