Hydraulic control valve block, hydraulic control system and hydraulic equipment

Abstract

The present invention is a hydraulic control valve block, a hydraulic control system and a hydraulic device. The hydraulic control valve block includes a control circuit and a brake circuit. The control circuit is connected between a hydraulic source and a hydraulic cylinder. The brake circuit includes a first electromagnetic reversing valve, a synchronous motor and a first hydraulically controlled one-way valve. The first main oil inlet of the first electromagnetic reversing valve is connected to the first oil pipeline of the control circuit. The first main oil return port of the first electromagnetic reversing valve is connected to the hydraulic source. The first working oil port of the first electromagnetic reversing valve is connected to the first flow outlet of the synchronous motor. The second working oil port of the first electromagnetic reversing valve is respectively connected to the first pilot port of the first hydraulically controlled one-way valve and the first flow inlet of the synchronous motor. The second flow inlet of the synchronous motor is connected to the first oil inlet of the first hydraulically controlled one-way valve. The first oil outlet of the first hydraulically controlled one-way valve is connected to the hydraulic cylinder. The second flow outlet of the synchronous motor is connected to the hydraulic source. The present invention solves the technical problems that the brake device is easily damaged and the braking is not timely.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and further to a hydraulic control valve block, a hydraulic control system and hydraulic equipment, and in particular to a hydraulic control valve block, a hydraulic control system and hydraulic equipment applied to equipment such as cooling beds and traveling vehicles. Background Art

[0002] At present, mechanical equipment mostly adopts passive control to brake, motor-driven equipment mostly adopts frequency conversion plus brake control to brake, and hydraulic-driven equipment mostly adopts in-cylinder buffer, external balance valve and accumulator to brake. The commonality of the braking forms of the above-mentioned various equipment is to convert mechanical kinetic energy into heat energy, elastic potential energy or pressure energy, so as to achieve the purpose of braking. However, some equipment may generate too much kinetic energy or pressure energy at the moment of braking, which exceeds the mechanical limit strength of the buffer equipment (component) and causes equipment damage, or equipment fatigue damage due to limited braking operations, which may cause braking failure or untimely braking. In addition, noise pollution will be generated during the braking process of the equipment, which will affect the health of the staff. All of the above situations will cause economic losses and reduced work efficiency, which is not conducive to the development of the enterprise and the expansion of production scale.

[0003] There is no effective solution to the problems of easy damage of braking equipment and untimely braking in the prior art.

[0004] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a hydraulic control valve block, a hydraulic control system and a hydraulic device to overcome the defects of the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a hydraulic control valve block, a hydraulic control system and a hydraulic device, which can realize rapid braking of equipment driven by a hydraulic cylinder under precise, stable and impact-free working conditions by coordinating a control circuit with a brake circuit, and realize normal starting, reversing and speed adjustment of the hydraulic cylinder through the control circuit. When the hydraulic cylinder needs to be stopped, it automatically switches to the brake circuit to ensure that the hydraulic cylinder can be braked within a predetermined time and travel range to meet the needs of production and development.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides a hydraulic control valve block, the hydraulic control valve block comprising a control circuit for controlling the operation of a hydraulic cylinder and a brake circuit for controlling the braking of the hydraulic cylinder, wherein:

[0008] The two ends of the first oil pipeline of the control circuit are respectively used to communicate with the hydraulic oil inlet of the hydraulic source and the rodless chamber of the hydraulic cylinder, and the two ends of the second oil pipeline of the control circuit are respectively used to communicate with the hydraulic oil return port of the hydraulic source and the rod chamber of the hydraulic cylinder;

[0009] The brake circuit includes a first electromagnetic reversing valve, a synchronous motor and a first hydraulically controlled one-way valve. The first main oil inlet of the first electromagnetic reversing valve is connected to the first oil pipeline of the control circuit. The first main oil return port of the first electromagnetic reversing valve is used to communicate with the hydraulic return port of the hydraulic source. The first working oil port of the first electromagnetic reversing valve is connected to the first outflow port of the synchronous motor. The second working oil port of the first electromagnetic reversing valve is respectively connected to the first pilot port of the first hydraulically controlled one-way valve and the first inflow port of the synchronous motor. The second inflow port of the synchronous motor is connected to the first oil inlet of the first hydraulically controlled one-way valve. The first oil outlet of the first hydraulically controlled one-way valve is used to communicate with the rodless chamber of the hydraulic cylinder. The second outflow port of the synchronous motor is used to communicate with the hydraulic return port of the hydraulic source.

[0010] In a preferred embodiment of the present invention, a one-way valve is provided between the synchronous motor and the hydraulic source, the fluid inlet of the one-way valve is connected to the hydraulic oil return port of the hydraulic source, and the fluid outlet of the one-way valve is connected to the second inlet of the synchronous motor.

[0011] In a preferred embodiment of the present invention, the control circuit includes a second electromagnetic reversing valve, a third electromagnetic reversing valve, a logic valve and a second hydraulically controlled one-way valve, wherein:

[0012] The second main oil inlet of the second solenoid reversing valve is used to communicate with the hydraulic oil inlet of the hydraulic source, the second main oil return port of the second solenoid reversing valve is used to communicate with the hydraulic oil return port of the hydraulic source, the third working oil port of the second solenoid reversing valve is respectively connected with the first main oil inlet of the first solenoid reversing valve, the second pilot port of the second hydraulically controlled one-way valve and the third main oil inlet of the third solenoid reversing valve, the third main oil return port of the third solenoid reversing valve is used to communicate with the hydraulic oil return port of the hydraulic source, the fourth working oil port of the third solenoid reversing valve is connected with the first interface of the logic valve, the second interface of the logic valve is connected with the rodless chamber of the hydraulic cylinder, the fifth working oil port of the third solenoid reversing valve is connected with the second oil inlet of the second hydraulically controlled one-way valve, and the second oil outlet of the second hydraulically controlled one-way valve is connected with the rod chamber of the hydraulic cylinder.

[0013] In a preferred embodiment of the present invention, the third control port of the logic valve is connected to the second working oil port of the first electromagnetic reversing valve.

[0014] In a preferred embodiment of the present invention, the control circuit controls the hydraulic cylinder to be in a working state, the second main oil inlet of the second solenoid reversing valve is connected with the third working oil port, and the first high-pressure medium enters into the second hydraulically controlled one-way valve through the third working oil port and the second pilot port in sequence, so that the second hydraulically controlled one-way valve is non-returnable and fails; the third main oil inlet of the third solenoid reversing valve is connected with the fourth working oil port, and the third main oil return port of the third solenoid reversing valve is connected with the fifth working oil port, and the first high-pressure medium enters into the logic valve through the third working oil port, the third main oil inlet, the fourth working oil port and the first interface in sequence, and the first high-pressure medium enters into the rodless chamber of the hydraulic cylinder through the second interface of the logic valve, so as to push the piston in the hydraulic cylinder to move toward the rod chamber;

[0015] The second high-pressure medium in the rod chamber flows back to the hydraulic source through the second oil outlet and the second oil inlet of the second hydraulically controlled one-way valve, the fifth working oil port and the third main oil return port of the third solenoid reversing valve, and the hydraulic oil return port of the hydraulic source in sequence.

[0016] In a preferred embodiment of the present invention, the brake circuit controls the hydraulic cylinder to be in a braking state, the third main oil inlet of the third electromagnetic reversing valve is disconnected from the fourth working oil port, the first interface of the logic valve is disconnected from the second interface, the first main oil inlet of the first electromagnetic reversing valve is connected to the second working oil port, the first main oil return port of the first electromagnetic reversing valve is connected to the first working oil port, and a part of the first high-pressure medium in the second electromagnetic reversing valve enters the first hydraulically controlled one-way valve through the first pilot port of the first hydraulically controlled one-way valve, so that the first hydraulically controlled one-way valve is invalid in terms of check valve operation; another part of the first high-pressure medium in the second electromagnetic reversing valve enters the synchronous motor through the third working oil port of the second electromagnetic reversing valve, the first main oil inlet and the second working oil port of the first electromagnetic reversing valve, and the first inlet of the synchronous motor in sequence, so as to drive the synchronous motor to rotate, the pressure at the second outlet position of the synchronous motor is reduced, and the first high-pressure medium in the rodless chamber flows back to the hydraulic source through the second inlet and the second outlet of the synchronous motor and the hydraulic return port of the hydraulic source.

[0017] In a preferred embodiment of the present invention, the first electromagnetic reversing valve and the second electromagnetic reversing valve are both two-position four-way electromagnetic valves, and the third electromagnetic reversing valve is a three-position four-way electromagnetic valve.

[0018] The present invention provides a hydraulic control system, which includes a hydraulic source, an electrical control box, a hydraulic cylinder and the above-mentioned hydraulic control valve block, wherein:

[0019] The hydraulic source is connected to the rodless chamber of the hydraulic cylinder and the rod chamber of the hydraulic cylinder respectively through the control circuit, and the hydraulic source is connected to the rodless chamber of the hydraulic cylinder through the brake circuit;

[0020] A controller is arranged in the electrical control box, and a control signal output end of the controller is electrically connected to a control end of the hydraulic control valve block.

[0021] The present invention provides a hydraulic device, which includes a device body and the above-mentioned hydraulic control system, wherein:

[0022] The hydraulic cylinder is arranged on the equipment body, the electrical control box and the hydraulic control valve block are separated from the equipment body, and the electrical control box and the hydraulic control valve block are arranged at a position close to the equipment body.

[0023] As described above, the characteristics and advantages of the hydraulic control valve block, hydraulic control system and hydraulic equipment of the present invention are: a first oil pipeline of the control circuit is connected between the oil inlet of the hydraulic source and the rodless chamber of the hydraulic cylinder, and a second oil pipeline of the control circuit is connected between the hydraulic oil return port of the hydraulic source and the rod chamber of the hydraulic cylinder. The hydraulic cylinder is controlled to work normally through the control circuit, and normal operations such as normal starting, reversing and speed adjustment of the hydraulic cylinder can be achieved, ensuring that the equipment driven by the hydraulic cylinder can be in a normal and stable working state; a braking circuit is added to the control circuit. When the hydraulic equipment needs to stop working, the control circuit is disconnected and automatically switched to the braking circuit. The synchronous motor is driven to start by the first high-pressure medium in the control circuit, so that the first high-pressure medium in the rodless chamber of the hydraulic cylinder is transported back to the hydraulic source through the synchronous motor, so that the pressure driving the hydraulic cylinder is less than the external atmospheric pressure, ensuring that the hydraulic cylinder can achieve braking under precise, stable and impact-free common working conditions, ensuring that the hydraulic cylinder can achieve the entire braking process within a predetermined time period and within a preset stroke range, and completing the refined control of the braking of the hydraulic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0025] in:

[0026] Figure 1 : It is the internal structure connection diagram of the hydraulic control valve block of the present invention.

[0027] Figure 2 : It is a partial enlarged view of the control circuit in the hydraulic control valve block of the present invention.

[0028] Figure 3: It is a partial enlarged view of the brake circuit in the hydraulic control valve block of the present invention.

[0029] Figure 4 : is a connection block diagram of the hydraulic control system of the present invention.

[0030] Figure 5 : It is a connection block diagram of the hydraulic equipment of the present invention.

[0031] The accompanying drawings in the present invention are:

[0032] 1. Control circuit; 101. Second electromagnetic reversing valve;

[0033] 102. a third electromagnetic reversing valve; 103. a logic valve;

[0034] 104. Second hydraulically controlled one-way valve; 2. Braking circuit;

[0035] 201. A first electromagnetic reversing valve; 202. A synchronous motor;

[0036] 2021, second flow axis; 2022, first flow axis;

[0037] 203. First hydraulically controlled one-way valve; 204. One-way valve;

[0038] 3. Hydraulic source; 4. Electrical control box;

[0039] 5. Hydraulic cylinder; 501. Rodless chamber;

[0040] 502, rod cavity; 6, equipment body;

[0041] P0, hydraulic oil inlet; T0, hydraulic oil return port;

[0042] P1, the second main oil inlet; T1, the second main oil return port;

[0043] B1, the third working oil port; P2, the third main oil inlet port;

[0044] T2, the third main oil return port; A2, the fourth working oil port;

[0045] B2, the fifth working oil port; P3, the first main oil inlet port;

[0046] T3, the first main oil return port; A3, the first working oil port;

[0047] B3, second working oil port; 11, second oil inlet port;

[0048] 12. Second oil outlet; 1X. Second pilot port;

[0049] 21. First oil inlet; 22. First oil outlet;

[0050] 2X, first pilot port; 31, first interface;

[0051] 32. Second interface; 33. Third control port;

[0052] 41. Liquid inlet; 42. Liquid outlet;

[0053] a1, second outflow port; a2, second inflow port;

[0054] b1, first flow outlet; b2, first flow inlet;

[0055] T01, first channel; T02, second channel;

[0056] T03, the third channel; T04, the fourth channel;

[0057] T05, fifth channel; P11, sixth channel;

[0058] P12, seventh channel; P13, eighth channel;

[0059] A11, the ninth channel; A12, the tenth channel;

[0060] B11, 11th channel; B12, 12th channel;

[0061] B13, 13th channel; B14, 14th channel. DETAILED DESCRIPTION

[0062] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0063] Implementation Method 1

[0064] like Figures 1 to 3As shown, the present invention provides a hydraulic control valve block, which includes a control circuit 1 and a brake circuit 2, wherein the control circuit 1 is used to control the operation of the hydraulic cylinder 5, and the brake circuit 2 is used to cooperate with the control circuit 1 to control the braking of the hydraulic cylinder 5, wherein: one end of the first oil pipeline in the control circuit 1 is connected to the hydraulic oil inlet P0 of the hydraulic source 3, the other end of the first oil pipeline is connected to the rodless chamber 501 of the hydraulic cylinder 5, and one end of the second oil pipeline in the control circuit 1 is connected to the hydraulic oil return port T0 of the hydraulic source 3 The other end of the second oil pipeline is connected to the rod chamber 502 of the hydraulic cylinder 5, and the hydraulic oil inlet P0 of the hydraulic source 3 delivers the first high-pressure medium to the rodless chamber 501 of the hydraulic cylinder 5 through the first oil pipeline of the control circuit 1, thereby pushing the piston in the hydraulic cylinder 5 to move toward the rod chamber 502 through the first high-pressure medium, and the original second high-pressure medium in the rod chamber 502 flows back to the hydraulic oil return port T0 of the hydraulic source 3 through the second oil pipeline of the control circuit 1, thereby ensuring the normal operation of the hydraulic cylinder 5. The brake circuit 2 includes a first electromagnetic reversing valve 201, a synchronous motor 202 and a first hydraulically controlled non-return valve 203. The first main oil inlet P3 of the first electromagnetic reversing valve 201 is connected to the first oil delivery pipeline of the control circuit 1. The first main oil return port T3 of the first electromagnetic reversing valve 201 is connected to the hydraulic oil return port T0 of the hydraulic source 3 through the fourth channel T04. The first working oil port A3 of the first electromagnetic reversing valve 201 is connected to the first outflow port b1 of the synchronous motor 202. The second working oil port B3 of the first electromagnetic reversing valve 201 is connected to the first pilot port 2X of the first hydraulically controlled non-return valve 203 through the twelfth channel B12 and the fourteenth channel B14 in sequence. The second channel B12 is connected with the fourteenth channel B14, the second working oil port B3 of the first solenoid reversing valve 201 is connected with the first inlet b2 of the synchronous motor 202 through the eleventh channel B11, the second inlet a2 of the synchronous motor 202 is connected with the first oil inlet 21 of the first hydraulically controlled one-way valve 203, the first oil outlet 22 of the first hydraulically controlled one-way valve 203 is connected with the rodless chamber 501 of the hydraulic cylinder 5 through the tenth channel A12, the first hydraulically controlled one-way valve 203 is unidirectionally connected from the synchronous motor 202 to the hydraulic cylinder 5, and the second outflow port a1 of the synchronous motor 202 is connected with the hydraulic oil return port T0 of the hydraulic source 3 through the third channel T03.

[0065] In the present invention, a first oil pipeline of the control circuit 1 is connected between the hydraulic oil inlet P0 of the hydraulic source 3 and the rodless chamber 501 of the hydraulic cylinder 5, and a second oil pipeline of the control circuit 1 is connected between the hydraulic oil return port T0 of the hydraulic source 3 and the rod chamber 502 of the hydraulic cylinder 5. The hydraulic cylinder 5 is controlled to work normally through the control circuit 1, and conventional operations such as normal starting, reversing, and speed adjustment of the hydraulic cylinder 5 can be achieved, ensuring that the equipment driven by the hydraulic cylinder 5 can be in a normal and stable working state; a brake circuit 2 is added to the control circuit 1, and when the hydraulic equipment needs to stop During operation, the control circuit 1 is disconnected and automatically switched to the brake circuit 2. The synchronous motor 202 is started by the first high-pressure medium in the control circuit 1, so that the first high-pressure medium in the rodless chamber 501 of the hydraulic cylinder 5 is transported back to the hydraulic source 3 through the synchronous motor 202, so that the pressure driving the hydraulic cylinder 5 is lower than the external atmospheric pressure, ensuring that the hydraulic cylinder 5 can achieve braking under precise, stable and impact-free working conditions, ensuring that the hydraulic cylinder 5 can achieve the entire braking process within a predetermined time period and a preset stroke range, and completing the refined control of the braking of the hydraulic equipment.

[0066] In an optional embodiment of the present invention, Figure 1 , Figure 3 As shown, a one-way valve 204 is provided between the synchronous motor 202 and the hydraulic source 3 for unidirectional communication from the hydraulic source 3 to the synchronous motor 202. The liquid inlet 41 of the one-way valve 204 is connected to the hydraulic oil return port T0 of the hydraulic source 3 through the fifth channel T05, and the liquid outlet 42 of the one-way valve 204 is connected to the second inlet a2 of the synchronous motor 202. When the second high-pressure medium entering the synchronous motor 202 through the second inlet a2 is insufficient, the one-way valve 204 can be controlled to open, and the high-pressure medium is supplemented into the second inlet a2 through the fifth channel T05 and the one-way valve 204.

[0067] Furthermore, the one-way valve 204 may be, but is not limited to, a hydraulically controlled one-way valve or an electrically controlled one-way valve.

[0068] In an optional embodiment of the present invention, Figure 1 , Figure 2As shown, the control circuit 1 includes a second solenoid reversing valve 101, a third solenoid reversing valve 102, a logic valve 103 and a second hydraulically controlled one-way valve 104, wherein: the second main oil inlet P1 of the second solenoid reversing valve 101 is connected to the hydraulic oil inlet P0 of the hydraulic source 3, the second main oil return port T1 of the second solenoid reversing valve 101 is connected to the hydraulic oil return port T0 of the hydraulic source 3 through the first channel T01, the third working oil port B1 of the second solenoid reversing valve 101 is connected to the first main oil inlet P3 of the first solenoid reversing valve 201 through the eighth channel P13, the third working oil port B1 of the second solenoid reversing valve 101 is connected to the second pilot port 1X of the second hydraulically controlled one-way valve 104 through the seventh channel P12, and the second solenoid The third working oil port B1 of the reversing valve 101 is connected to the third main oil inlet P2 of the third solenoid reversing valve 102 through the sixth channel P11, the third main oil return port T2 of the third solenoid reversing valve 102 is connected to the hydraulic return port T0 of the hydraulic source 3 through the second channel T02, the fourth working oil port A2 of the third solenoid reversing valve 102 is connected to the first interface 31 of the logic valve 103, the second interface 32 of the logic valve 103 is connected to the rodless chamber 501 of the hydraulic cylinder 5 through the ninth channel A11, the fifth working oil port B2 of the third solenoid reversing valve 102 is connected to the second oil inlet 11 of the second hydraulically controlled one-way valve 104, and the second oil outlet 12 of the second hydraulically controlled one-way valve 104 is connected to the rod chamber 502 of the hydraulic cylinder 5.

[0069] Further, such as Figure 1 As shown, the third control port 33 of the logic valve 103 is connected to the second working oil port B3 of the first electromagnetic reversing valve 201 through the thirteenth channel B13 and the twelfth channel B12 in sequence, and the thirteenth channel B13 is connected to the twelfth channel B12. During the braking process of the hydraulic cylinder 5, part of the first high-pressure medium can be delivered to the logic valve 103 through the third control port 33 of the logic valve 103 through the second working oil port B3 of the first electromagnetic reversing valve 201, so as to promote the valve core in the logic valve 103 to be stably reset, and ensure that the logic valve 103 is in the disconnected position when the hydraulic cylinder 5 is in the braking state.

[0070] Furthermore, the first electromagnetic reversing valve 201 and the second electromagnetic reversing valve 101 may be, but not limited to, two-position four-way electromagnetic valves, and the third electromagnetic reversing valve 102 may be, but not limited to, three-position four-way electromagnetic valves.

[0071] Furthermore, the synchronous motor 202 can adopt but is not limited to a two-flow synchronous motor. The synchronous motor 202 is provided with a first flow shaft 2022 and a second flow shaft 2021 that can rotate synchronously and in the same direction. The position of the first flow shaft 2022 is opposite to the positions of the first flow outlet b1 and the first flow inlet b2, and the position of the second flow shaft 2021 is opposite to the positions of the second flow outlet a1 and the second flow inlet a2.

[0072] The working state of the hydraulic control valve block of the present invention (wherein: the piston rod of the hydraulic cylinder 5 is completely retracted into the hydraulic cylinder 5 as the initial state, the first electromagnetic reversing valve 201, the second electromagnetic reversing valve 101 and the third electromagnetic reversing valve 102 are all not energized as the initial state, at this time the logic valve 103 is disconnected, and the first hydraulically controlled one-way valve 203 and the second hydraulically controlled one-way valve 104 are both in the non-return state.) includes:

[0073] 1. When the control circuit 1 controls the hydraulic cylinder 5 to be in working state, the electromagnet a of the second electromagnetic reversing valve 101 is energized, the second main oil inlet P1 of the second electromagnetic reversing valve 101 is connected to the third working oil port B1, the first high-pressure medium in the hydraulic source 3 is connected to the sixth channel P11, the seventh channel P12 and the eighth channel P13, and the first high-pressure medium in the hydraulic source 3 enters the second hydraulically controlled one-way valve 104 through the third working oil port B1 and the second pilot port 1X in sequence, so that the check function of the second hydraulically controlled one-way valve 104 is invalid (that is, the second oil inlet 11 and the second oil outlet 12 of the second hydraulically controlled one-way valve 104 are connected); at the same time, the electromagnet b of the third electromagnetic reversing valve 102 is energized, and the third main oil inlet P1 of the third electromagnetic reversing valve 102 is connected to the third working oil port B1. Port P2 is connected with the fourth working oil port A2, the third main oil return port T2 of the third solenoid reversing valve 102 is connected with the fifth working oil port B2, and the first high-pressure medium enters into the logic valve 103 through the third working oil port B1, the third main oil inlet port P2, the fourth working oil port A2 and the first interface 31 in sequence. Under the pressure of the first high-pressure medium, the valve core of the logic valve 103 moves, and the first interface 31 of the logic valve 103 is connected with the second interface 32. The first high-pressure medium can enter into the rodless chamber 501 of the hydraulic cylinder 5 through the second interface 32 of the logic valve 103 to push the piston in the hydraulic cylinder 5 to move toward the rod chamber 502, and the piston rod of the hydraulic cylinder 5 moves outward and extends, and the piston rod of the hydraulic cylinder 5 can drive the load to move forward. At this time, the original second high-pressure medium in the rod chamber 502 flows back to the hydraulic source 3 through the second oil outlet 12 and the second oil inlet 11 of the second hydraulically controlled one-way valve 104, the fifth working oil port B2 and the third main oil return port T2 of the third solenoid reversing valve 102, and the hydraulic oil return port T0 of the hydraulic source 3.

[0074] 2. When the brake circuit 2 controls the hydraulic cylinder 5 to be in a braking state (the time of issuing the braking command can be controlled according to a preset speed-time curve or a stroke-time curve, when the load is about to stop or the load moves to the end stop position and reaches the braking stroke, such as setting the braking time to 1.5s to 3s or the braking stroke to 10mm, etc., wherein: the braking time or the braking stroke has been configured when the hydraulic cylinder 5 and the synchronous motor 202 are selected), the electromagnet b of the third electromagnetic reversing valve 102 is controlled to lose power, the valve core of the third electromagnetic reversing valve 102 is controlled to reset, and the third electromagnetic reversing valve 102 is controlled to reset. The connection between the third main oil inlet port P2 and the fourth working oil port A2 of the valve 102 is disconnected. At this time, due to the inertia of the hydraulic equipment's own movement, the volume of the rodless chamber 501 of the hydraulic cylinder 5 will continue to increase, resulting in a decrease in the pressure in the rodless chamber 501, and the pressure of the second interface 32 of the logic valve 103 will also decrease accordingly, so that the logic valve 103 resets the valve core of the logic valve 103, and the first interface 31 and the second interface 32 of the logic valve 103 are disconnected. Of course, in the process again, the second high-pressure medium in the rod chamber 502 of the hydraulic cylinder 5 will continue to flow back to the hydraulic source 3 under the push of the piston.The electromagnet a controlling the first electromagnetic reversing valve 201 is energized, the first main oil inlet P3 of the first electromagnetic reversing valve 201 is connected with the second working oil port B3, the first main oil return port T3 of the first electromagnetic reversing valve 201 is connected with the first working oil port A3, the first high-pressure medium in the hydraulic source 3 is connected to the second working oil port B3 of the first electromagnetic reversing valve 201 through the first electromagnetic reversing valve 201, part of the first high-pressure medium will flow into the logic valve 103 through the twelfth channel B12, the thirteenth channel B13 and the third control port 33 in sequence to push the valve core in the logic valve 103 to stably reset to the disconnected position, and another part of the first high-pressure medium will enter the first hydraulically controlled one-way valve 203 through the twelfth channel B12, the fourteenth channel B14 and the first oil outlet 22 of the first hydraulically controlled one-way valve 203 in sequence, and the first hydraulically controlled one-way valve 203 fails to be reversed under the pressure of the first high-pressure medium; the second electromagnetic reversing valve 10 The third part of the first high-pressure medium in 1 enters into the synchronous motor 202 through the third working oil port B1 of the second electromagnetic reversing valve 101, the first main oil inlet P3 and the second working oil port B3 of the first electromagnetic reversing valve 201 and the first inlet b2 of the synchronous motor 202 in turn to drive the synchronous motor 202 to rotate. The second flow shaft 2021 of the synchronous motor 202 will drive the first flow shaft 2022 to rotate synchronously. The first high-pressure medium in the rodless chamber 501 of the hydraulic cylinder 5 is sucked into the synchronous motor 202 through the tenth channel A12, the first hydraulically controlled one-way valve 203 and the second inlet a2 of the synchronous motor 202 in turn, and flows back to the hydraulic source 3 through the second outflow port a1 of the synchronous motor 202 and the hydraulic return port T0 of the hydraulic source 3. At this time, since the pressure driving the piston movement in the hydraulic cylinder 5 is lower than the external atmospheric pressure, the hydraulic cylinder 5 and the hydraulic equipment driven by the hydraulic cylinder 5 are self-braked.

[0075] The characteristics and advantages of the hydraulic control valve block of the present invention are:

[0076] 1. The hydraulic control valve block is connected with a first oil pipeline of the control circuit 1 between the hydraulic oil inlet P0 of the hydraulic source 3 and the rodless chamber 501 of the hydraulic cylinder 5, and a second oil pipeline of the control circuit 1 is connected between the hydraulic oil return port T0 of the hydraulic source 3 and the rod chamber 502 of the hydraulic cylinder 5. The hydraulic cylinder 5 is controlled to work normally through the control circuit 1, and conventional operations such as normal starting, reversing, and speed adjustment of the hydraulic cylinder 5 can be achieved, ensuring that the equipment driven by the hydraulic cylinder 5 can be in a normal and stable working state.

[0077] 2. The hydraulic control valve block adds a braking circuit 2 to the control circuit 1. When the hydraulic equipment needs to stop working, the control circuit 1 is disconnected and automatically switched to the braking circuit 2. The first high-pressure medium in the control circuit 1 drives the synchronous motor 202 to start, so that the first high-pressure medium in the rodless chamber 501 of the hydraulic cylinder 5 is transported back to the hydraulic source 3 through the synchronous motor 202, so that the pressure driving the hydraulic cylinder 5 is less than the external atmospheric pressure, ensuring that the hydraulic cylinder 5 can achieve braking under precise, stable and impact-free working conditions, ensuring that the hydraulic cylinder 5 can achieve the entire braking process within a predetermined time period and a preset stroke range, and completing the refined control of the braking of the hydraulic equipment.

[0078] Implementation Method 2

[0079] like Figure 4 As shown, the present invention provides a hydraulic control system, which includes a hydraulic source 3, an electrical control box 4, a hydraulic cylinder 5 and the above-mentioned hydraulic control valve block, wherein: the hydraulic source 3 is connected to the rodless chamber 501 of the hydraulic cylinder 5 and the rod chamber 502 of the hydraulic cylinder 5 respectively through a control circuit 1, and the hydraulic source 3 is connected to the rodless chamber 501 of the hydraulic cylinder 5 through a brake circuit 2; a controller is arranged in the electrical control box 4, and a control signal output end of the controller is electrically connected to a control end of the hydraulic control valve block.

[0080] The hydraulic control system of the present invention controls the connection state of each single reversing valve in the hydraulic control valve block through the controller in the electrical control box 4, thereby controlling the working state of the control circuit 1 and the brake circuit 2 in the hydraulic valve block respectively, and can be operated locally or remotely as needed, which is convenient for the operation and control of the staff. When the brake circuit 2 is disconnected, the control circuit 1 connects the hydraulic source 3 with the rodless chamber 501 and the rod chamber 502 of the hydraulic cylinder 5 to ensure the normal operation of the hydraulic cylinder 5; when the control circuit 1 is disconnected, the brake circuit 2 connects the hydraulic source 3 with the rodless chamber 501 of the hydraulic cylinder 5, so that the high-pressure medium in the rodless chamber 501 flows back to the hydraulic source 3, ensuring the rapid braking of the hydraulic cylinder 5.

[0081] Implementation Method 3

[0082] like Figure 5 As shown, the present invention provides a hydraulic device, which includes a device body 6 and the above-mentioned hydraulic control system, wherein: the hydraulic cylinder 5 is arranged on the device body 6, the electrical control box 4 and the hydraulic control valve block are separated from the device body 6, and the electrical control box 4 and the hydraulic control valve block are both arranged at a position close to the device body 6.

[0083] The present invention can quickly and accurately control the operation and braking of hydraulic equipment through a hydraulic control system. The control is simple and can achieve smooth and precise braking operations. It is particularly suitable for hydraulic equipment with large loads, high speeds and frequent actions, and is suitable for promotion and use in multiple industries and fields.

[0084] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A hydraulic control valve block, characterized in that: The hydraulic control valve block comprises a control circuit (1) capable of controlling the operation of a hydraulic cylinder (5) and a brake circuit (2) capable of controlling the braking of the hydraulic cylinder (5), wherein: The two ends of the first oil pipeline of the control circuit (1) are respectively used to communicate with the hydraulic oil inlet (P0) of the hydraulic source (3) and the rodless chamber (501) of the hydraulic cylinder (5), and the two ends of the second oil pipeline of the control circuit (1) are respectively used to communicate with the hydraulic oil return port (T0) of the hydraulic source (3) and the rod chamber (502) of the hydraulic cylinder (5); The brake circuit (2) comprises a first electromagnetic reversing valve (201), a synchronous motor (202) and a first hydraulically controlled non-return valve (203); a first main oil inlet (P3) of the first electromagnetic reversing valve (201) is connected to a first oil delivery pipeline of the control circuit (1); a first main oil return port (T3) of the first electromagnetic reversing valve (201) is used to communicate with a hydraulic oil return port (T0) of the hydraulic source (3); a first working oil port (A3) of the first electromagnetic reversing valve (201) is connected to a first outflow port (b1) of the synchronous motor (202); and a first hydraulically controlled non-return valve (203) is provided for controlling the first electromagnetic reversing valve (201) to control the first hydraulic circuit (1). The second working oil port (B3) is respectively connected to the first pilot port (2X) of the first hydraulically controlled one-way valve (203) and the first inlet port (b2) of the synchronous motor (202); the second inlet port (a2) of the synchronous motor (202) is connected to the first oil inlet port (21) of the first hydraulically controlled one-way valve (203); the first oil outlet port (22) of the first hydraulically controlled one-way valve (203) is used to communicate with the rodless chamber (501) of the hydraulic cylinder (5); and the second outlet port (a1) of the synchronous motor (202) is used to communicate with the hydraulic oil return port (T0) of the hydraulic source (3); A one-way valve (204) is provided between the synchronous motor (202) and the hydraulic source (3); a liquid inlet (41) of the one-way valve (204) is used to communicate with a hydraulic oil return port (T0) of the hydraulic source (3); and a liquid outlet (42) of the one-way valve (204) is connected to a second inlet (a2) of the synchronous motor (202); The control circuit (1) comprises a second electromagnetic reversing valve (101), a third electromagnetic reversing valve (102), a logic valve (103) and a second hydraulically controlled one-way valve (104), wherein: The second main oil inlet (P1) of the second solenoid reversing valve (101) is used to communicate with the hydraulic oil inlet (P0) of the hydraulic source (3); the second main oil return port (T1) of the second solenoid reversing valve (101) is used to communicate with the hydraulic oil return port (T0) of the hydraulic source (3); the third working oil port (B1) of the second solenoid reversing valve (101) is respectively connected to the first main oil inlet (P3) of the first solenoid reversing valve (201), the second pilot port (1X) of the second hydraulically controlled non-return valve (104) and the third main oil inlet (P2) of the third solenoid reversing valve (102); the third solenoid reversing valve (102) is connected to the hydraulic oil return port (T0) of the hydraulic source (3); ) is used to communicate with the hydraulic return port (T0) of the hydraulic source (3); the fourth working oil port (A2) of the third electromagnetic reversing valve (102) is connected to the first interface (31) of the logic valve (103); the second interface (32) of the logic valve (103) is connected to the rodless chamber (501) of the hydraulic cylinder (5); the fifth working oil port (B2) of the third electromagnetic reversing valve (102) is connected to the second oil inlet (11) of the second hydraulically controlled one-way valve (104); and the second oil outlet (12) of the second hydraulically controlled one-way valve (104) is connected to the rod chamber (502) of the hydraulic cylinder (5).

2. The hydraulic control valve block according to claim 1, characterized in that: The third control port (33) of the logic valve (103) is connected to the second working oil port (B3) of the first electromagnetic reversing valve (201).

3. The hydraulic control valve block according to claim 2, characterized in that: The control circuit (1) controls the hydraulic cylinder (5) to be in a working state, the second main oil inlet (P1) of the second electromagnetic reversing valve (101) is connected to the third working oil port (B1), and the first high-pressure medium enters the second hydraulically controlled non-return valve (104) through the third working oil port (B1) and the second pilot port (1X) in sequence, so that the check valve of the second hydraulically controlled non-return valve (104) is invalid; the third main oil inlet (P2) of the third electromagnetic reversing valve (102) is connected to the fourth working oil port (A2), and the third electromagnetic reversing valve (102) is connected to the fourth working oil port (A2). The third main oil return port (T2) of the logic valve (102) is connected to the fifth working oil port (B2), the first high-pressure medium enters the logic valve (103) through the third working oil port (B1), the third main oil inlet port (P2), the fourth working oil port (A2) and the first interface (31) in sequence, and the first high-pressure medium enters the rodless chamber (501) of the hydraulic cylinder (5) through the second interface (32) of the logic valve (103) to push the piston in the hydraulic cylinder (5) to move toward the rod chamber (502); The second high-pressure medium in the rod chamber (502) flows back to the hydraulic source (3) through the second oil outlet (12) and the second oil inlet (11) of the second hydraulically controlled one-way valve (104), the fifth working oil port (B2) and the third main oil return port (T2) of the third solenoid reversing valve (102), and the hydraulic oil return port (T0) of the hydraulic source (3) in sequence.

4. The hydraulic control valve block according to claim 3, characterized in that: The brake circuit (2) controls the hydraulic cylinder (5) to be in a braking state, the third main oil inlet (P2) of the third solenoid reversing valve (102) is disconnected from the fourth working oil port (A2), the first interface (31) of the logic valve (103) is disconnected from the second interface (32), the first main oil inlet (P3) of the first solenoid reversing valve (201) is connected to the second working oil port (B3), the first main oil return port (T3) of the first solenoid reversing valve (201) is connected to the first working oil port (A3), and part of the first high-pressure medium in the second solenoid reversing valve (101) enters the first hydraulically controlled one-way valve (203) through the first pilot port (2X) of the first hydraulically controlled one-way valve (203), so that the first hydraulically controlled one-way valve (203) is non-returnable. Failure; another part of the first high-pressure medium in the second solenoid reversing valve (101) enters the synchronous motor (202) in sequence through the third working oil port (B1) of the second solenoid reversing valve (101), the first main oil inlet (P3) and the second working oil port (B3) of the first solenoid reversing valve (201) and the first inlet (b2) of the synchronous motor (202) to drive the synchronous motor (202) to rotate, the position pressure of the second outflow port (a1) of the synchronous motor (202) decreases, and the first high-pressure medium in the rodless chamber (501) flows back to the hydraulic source (3) through the second inflow port (a2) and the second outflow port (a1) of the synchronous motor (202) and the hydraulic return port (T0) of the hydraulic source (3).

5. The hydraulic control valve block according to claim 1, characterized in that: The first electromagnetic reversing valve (201) and the second electromagnetic reversing valve (101) are both two-position four-way electromagnetic valves, and the third electromagnetic reversing valve (102) is a three-position four-way electromagnetic valve.

6. A hydraulic control system, characterized in that: The hydraulic control system comprises a hydraulic source (3), an electrical control box (4), a hydraulic cylinder (5) and a hydraulic control valve block according to any one of claims 1 to 5, wherein: The hydraulic source (3) is connected to the rodless chamber (501) of the hydraulic cylinder (5) and the rod chamber (502) of the hydraulic cylinder (5) respectively through the control circuit (1), and the hydraulic source (3) is connected to the rodless chamber (501) of the hydraulic cylinder (5) through the brake circuit (2); A controller is arranged in the electrical control box (4), and a control signal output end of the controller is electrically connected to a control end of the hydraulic control valve block.

7. A hydraulic device, characterized in that: The hydraulic device comprises a device body (6) and a hydraulic control system as claimed in claim 6, wherein: The hydraulic cylinder (5) is arranged on the equipment body (6), the electrical control box (4) and the hydraulic control valve block are separated from the equipment body (6), and the electrical control box (4) and the hydraulic control valve block are arranged at a position close to the equipment body (6).

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