Hydraulic control system of hydraulic slag hopper

Abstract

The utility model discloses a hydraulic control system of a hydraulic slag hopper. The hydraulic control system comprises an integrated valve block, a two-way hydraulic motor, a driving piece used for driving the two-way hydraulic motor to work, an oil suction one-way valve, a first pressure oil way and a second pressure oil way, wherein the oil suction one-way valve, the first pressure oil way and the second pressure oil way are installed on the two-way hydraulic motor. The integrated valve block is arranged on the slag hopper oil tank, two oil ports of the bidirectional hydraulic motor are communicated with two oil inlets of the integrated valve block through hydraulic pipelines respectively, the two oil ports of the bidirectional hydraulic motor are each connected with an oil suction one-way valve in parallel, and the oil suction one-way valves are connected to the first pressure oil way and the second pressure oil way respectively. The driving part rotates forwards and backwards to drive the bidirectional hydraulic motor to rotate forwards and backwards so as to switch hydraulic oil flowing paths and supply oil to the two oil inlets of the integrated valve block, and the telescopic action of the hydraulic cylinder is controlled. The system is simple in control principle and control mode and convenient to overhaul, control is achieved through the integrated valve block, the module size is small, and disassembly, assembly, repair and maintenance are convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic slag buckets, in particular to a hydraulic control system of a hydraulic slag bucket. Background Art

[0002] A slag crane consists of a fuel tank, a hydraulic cylinder, a lifting beam, a hydraulic system, and a bucket. The hydraulic system primarily drives the cylinder, which in turn drives the bucket to open and close, enabling the grabbing and dropping of slag. Grabbing and dropping the incinerated slag onto the dump truck is equally crucial to the entire waste-to-energy process. The slag crane is hoisted and lowered using a crane. During the lifting process, the motor power cord must rise and fall synchronously with the crane. Control of the slag crane is remotely controlled. Conventional solenoid directional control valves require a control circuit to control the cylinder. If the control circuit follows the crane's movement, this increases control costs, malfunction rates, and maintenance difficulties. Due to the harsh operating environment and high frequency of use of the slag crane, the entire grabbing and dropping process must be simple to operate and have a low malfunction rate. Furthermore, space is limited, so the control valve station must be compact and easy to disassemble, repair, and maintain. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a hydraulic control system of a hydraulic slag bucket.

[0004] The utility model solves the above technical problems with the following technical solutions: A hydraulic control system for a hydraulic slag bucket, comprising an integrated valve block, a bidirectional hydraulic motor, a driving member for driving the bidirectional hydraulic motor, an oil suction one-way valve installed on the bidirectional hydraulic motor, a first pressure oil circuit, and a second pressure oil circuit;

[0005] The integrated valve block is arranged on the hopper oil tank. The two oil ports of the bidirectional hydraulic motor are connected to the two oil inlets of the integrated valve block through hydraulic pipelines respectively, and the two oil ports of the bidirectional hydraulic motor are each connected in parallel with an oil suction check valve, which is respectively connected to the first pressure oil circuit and the second pressure oil circuit. The bidirectional hydraulic motor is driven by the forward and reverse rotation of the driving member to switch the hydraulic oil flow path and supply oil to the two oil inlets of the integrated valve block respectively to control the extension and retraction action of the hydraulic cylinder.

[0006] Furthermore, the first pressure oil circuit includes a first cartridge-type one-way valve, a first cartridge-type pilot relief valve, a first cartridge-type hydraulically controlled one-way valve, and a first oil outlet connected through an internal oil circuit of the integrated valve block;

[0007] An oil inlet of the first cartridge pilot relief valve is connected between the bidirectional hydraulic motor and the first cartridge check valve through an internal oil circuit of the integrated valve block, a control port of the first cartridge pilot relief valve is connected between the first cartridge check valve and the first oil outlet through an internal oil circuit of the integrated valve block, and an oil outlet of the first cartridge pilot relief valve is connected to the oil return port through an internal oil circuit of the integrated valve block;

[0008] The first cartridge hydraulically controlled one-way valve is connected in parallel between the first cartridge one-way valve and the first oil outlet through the internal oil circuit of the integrated valve block, the control port of the first cartridge hydraulically controlled one-way valve is connected in parallel with the oil inlet of the second cartridge pilot relief valve of the second pressure oil circuit through the internal oil circuit of the integrated valve block, and the oil outlet of the first cartridge hydraulically controlled one-way valve is connected to the second oil outlet of the second cartridge pilot relief valve through the internal oil circuit of the integrated valve block.

[0009] Furthermore, the second pressure oil circuit includes a second cartridge-type one-way valve, a second cartridge-type pilot relief valve, a second cartridge-type hydraulically controlled one-way valve and a second oil outlet, which are connected through an internal oil circuit of the integrated valve block;

[0010] The oil inlet of the second cartridge pilot relief valve is connected between the bidirectional hydraulic motor and the second cartridge check valve through the internal oil circuit of the integrated valve block, and the control port of the second cartridge pilot relief valve is connected between the second cartridge check valve and the second oil outlet through the internal oil circuit of the integrated valve block;

[0011] The second cartridge hydraulically controlled one-way valve is connected in parallel between the second cartridge one-way valve and the second oil outlet through the internal oil circuit of the integrated valve block, the control port of the second cartridge hydraulically controlled one-way valve is connected in parallel with the oil inlet of the first cartridge pilot relief valve of the first pressure oil circuit through the internal oil circuit of the integrated valve block, and the oil outlet of the second cartridge hydraulically controlled one-way valve is connected to the oil return port through the internal oil circuit of the integrated valve block.

[0012] Furthermore, the oil return port is connected to an oil return filter through a hydraulic pipeline, and the oil return filter is installed on the hopper oil tank.

[0013] Furthermore, pressure measuring joints are respectively provided at the first oil outlet and the oil inlet of the first pressure oil circuit, and the second oil outlet and the oil inlet of the second pressure oil circuit.

[0014] Furthermore, the driving element adopts a three-phase asynchronous motor.

[0015] The utility model has the following beneficial effects: The hydraulic control system for a hydraulic hopper does not utilize electronic control. Instead, a plug-in pilot relief valve is used for pressure control. A hydraulic bidirectional motor supplies oil to the oil circuit. Directional control controls the forward and reverse rotation of the motor, supplying oil to two separate oil circuits to control the extension and retraction of the hydraulic cylinder. The forward and reverse rotation of the motor can be controlled simply by controlling the motor power supply, resulting in a simple and convenient control method. Furthermore, the integrated valve block is used for control, resulting in a compact module that is easy and quick to disassemble, repair, and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the principle of the hydraulic control system of this utility model;

[0017] Figure 2 This is a schematic diagram of the integrated valve block structure in the utility model;

[0018] Figures 1 to 2 The reference numerals shown in the figure represent respectively: 1-integrated valve block, 2-bidirectional hydraulic motor, 3-driving part, 4-oil suction check valve, 10-first cartridge check valve, 11-first cartridge pilot relief valve, 12-first cartridge hydraulic control check valve, 13-first oil outlet, 20-second cartridge check valve, 21-second cartridge pilot relief valve, 22-second cartridge hydraulic control check valve, 23-second oil outlet, 5-return oil filter, 6-pressure measuring joint. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] like Figures 1 to 2 As shown, a hydraulic control system for a hydraulic slag bucket includes an integrated valve block 1, a bidirectional hydraulic motor 2, a drive member 3 for driving the bidirectional hydraulic motor 2, an oil suction check valve 4 integrated in the integrated valve block 1, a first pressure oil circuit, and a second pressure oil circuit. The integrated valve block 1 is the core component in the hydraulic system and is used to integrate and connect various hydraulic components. The drive member 3 uses a three-phase asynchronous motor to provide power for the bidirectional hydraulic motor 2. It controls the rotation direction of the hydraulic motor by forward and reverse rotation, switches the hydraulic oil flow path, and supplies oil to the two oil inlets of the integrated valve block 1 respectively, so as to achieve the purpose of controlling the extension and contraction of the hydraulic cylinder and ultimately control the opening and closing of the slag bucket. The oil suction check valve 4 is used to prevent the hydraulic oil from flowing back and to supply oil to the oil circuit, thereby ensuring the stability and reliability of the hydraulic system.

[0021] The integrated valve block 1 is set on the hopper oil tank. The two oil ports of the bidirectional hydraulic motor 2 are connected to the two oil inlets of the integrated valve block 1 through hydraulic pipes. The two oil ports of the bidirectional hydraulic motor 2 are each connected in parallel with an oil suction check valve 4. The oil suction check valve 4 is respectively connected to the first pressure oil circuit and the second pressure oil circuit. The bidirectional hydraulic motor 2 is driven forward and reversed by the driving member 3, switching the hydraulic oil flow path and supplying oil to the two oil inlets of the integrated valve block 1 respectively to control the extension and contraction of the hydraulic cylinder. Figure 1 As shown, the first pressure oil circuit is P1 and the second pressure oil circuit is P2. When the bidirectional hydraulic motor 2 supplies oil to P1, the P2 port of the bidirectional hydraulic motor 2 absorbs oil through the oil suction check valve 4; when the bidirectional hydraulic motor 2 supplies oil to P2, the P1 port of the bidirectional hydraulic motor 2 absorbs oil through the oil suction check valve 4.

[0022] like Figure 1 As shown, the first pressure oil circuit includes a first cartridge check valve 10, a first cartridge pilot relief valve 11, a first cartridge hydraulic control check valve 12 and a first oil outlet 13 connected through the internal oil circuit of the integrated valve block 1. The first oil outlet is at Figure 1 A is used to represent it. The oil inlet of the first cartridge pilot relief valve 11 is connected between the bidirectional hydraulic motor 2 and the first cartridge check valve 10 through the internal oil circuit of the manifold 1. The control port of the first cartridge pilot relief valve 11 is connected between the first cartridge check valve 10 and the first oil outlet 13 through the internal oil circuit of the manifold 1. The oil outlet of the first cartridge pilot relief valve 11 is connected to the oil return port through the internal oil circuit of the manifold 1. The first cartridge hydraulically controlled check valve 12 is connected in parallel between the first cartridge check valve 10 and the first oil outlet 13 through the internal oil circuit of the manifold 1. The control port of the first cartridge hydraulically controlled check valve 12 is connected in parallel with the oil inlet of the second cartridge pilot relief valve 21 of the second pressure oil circuit through the internal oil circuit of the manifold 1. The oil outlet of the first cartridge hydraulically controlled check valve 12 is connected to the second oil outlet 23 of the second cartridge pilot relief valve 21 through the internal oil circuit of the manifold 1. The first cartridge-type one-way valve 10 is used to prevent the hydraulic oil from flowing back in a specific direction, ensuring that the oil can only flow from the oil inlet to the oil outlet. The first cartridge-type pilot relief valve 11, when the system pressure exceeds the set value, the pilot relief valve opens to discharge the excess hydraulic oil back to the oil tank to protect the hydraulic system from damage due to excessive pressure. At the same time, its control port can be used to remotely control the opening state of the valve. The first cartridge-type hydraulically controlled one-way valve 12, under the action of control pressure, can allow hydraulic oil to flow in two directions. When the control pressure disappears, the valve returns to the one-way valve function to prevent the oil from flowing back. The second cartridge-type pilot relief valve 21 is connected to the control port of the hydraulically controlled one-way valve in the first pressure oil circuit, and controls the opening state of the hydraulically controlled one-way valve by the pressure change of its oil inlet, thereby realizing mutual switching between oil circuits.

[0023] The second pressure oil circuit includes a second cartridge check valve 20, a second cartridge pilot relief valve 21, a second cartridge hydraulic control check valve 22 and a second oil outlet 23 which are connected through the internal oil circuit of the integrated valve block 1. Figure 1 Indicated by B. The oil inlet of the second cartridge pilot relief valve 21 is connected between the bidirectional hydraulic motor 2 and the second cartridge check valve 20 through the internal oil circuit of the manifold 1. The control port of the second cartridge pilot relief valve 21 is connected between the second cartridge check valve 20 and the second oil outlet 23 through the internal oil circuit of the manifold 1. The second cartridge hydraulically controlled check valve 22 is connected in parallel between the second cartridge check valve 20 and the second oil outlet 23 through the internal oil circuit of the manifold 1. The control port of the second cartridge hydraulically controlled check valve 22 is connected in parallel with the oil inlet of the first cartridge pilot relief valve 11 in the first pressure oil circuit through the internal oil circuit of the manifold 1. The oil outlet of the second cartridge hydraulically controlled check valve 22 is connected to the oil return port through the internal oil circuit of the manifold 1. Similar to the first cartridge check valve 10, the second cartridge check valve 20 prevents hydraulic oil from flowing back in a specific direction. The second pilot relief valve (21) opens when system pressure exceeds the set value, releasing excess hydraulic oil back to the tank to protect the hydraulic system from excessive pressure. Its control port can also be used to remotely control the valve's opening state, but in this design, it primarily responds to pressure changes within its own circuit. The second hydraulically piloted check valve (21) allows hydraulic oil to flow in both directions under control pressure. When the control pressure disappears, the valve reverts to a check valve function. Its control port is connected in parallel with the pilot relief valve inlet of the first pressure circuit, meaning the state of the first pressure circuit can affect the hydraulically piloted check valve in the second pressure circuit. When the cylinder retracts and the grab bucket closes, the second hydraulically piloted check valve (22) in the second pressure circuit (P2) opens, connecting port B of the second pressure circuit to the return port (T) through the second hydraulically piloted check valve (22).

[0024] like Figure 1 As shown, when the first pressure oil circuit P1 is operating with oil flowing in, the pressure controls the hydraulically controlled check valve of the second pressure oil circuit P2 to open, oil flowing into port A of the hydraulic cylinder and unloading oil from port B of the hydraulic cylinder, causing the hydraulic cylinder to retract and close the grab bucket. When the second pressure oil circuit P2 is operating with oil flowing in, the pressure controls the hydraulically controlled check valve of the first pressure oil circuit P1 to open, connecting port B of the hydraulic cylinder with port A of the hydraulic cylinder, forming differential control of the cylinders, and the hydraulic cylinder extends and opens the grab bucket.

[0025] like Figure 1 As shown, the oil return port is designated T. This port is connected to an oil return filter 5 via a hydraulic pipeline and is mounted on the hopper tank. The main function of the oil return filter 5 is to filter impurities and particulate matter from the oil returning from the hydraulic system to the tank, reducing pressure loss and energy consumption caused by impurity blockage, thereby improving the overall efficiency of the hydraulic system.

[0026] The first oil outlet 13 and oil inlet of the first pressure oil circuit, the second oil outlet 23 and oil inlet of the second pressure oil circuit are respectively provided with pressure measuring joints 6. There are four pressure measuring joints. Figure 1 They are represented as MA, MB, MP1, and MP2 respectively.

[0027] The pressure measuring joint 6 can monitor the pressure status of each key position in the hydraulic system in real time. By monitoring and analyzing the pressure data provided by the pressure measuring joint 6, the operator can optimize the performance of the hydraulic system, which helps to improve the reliability and stability of the system.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic control system for a hydraulic slag bucket, characterized in that: It comprises an integrated valve block (1), a bidirectional hydraulic motor (2), a driving member (3) for driving the bidirectional hydraulic motor (2) to work, an oil suction one-way valve (4) installed on the bidirectional hydraulic motor (2), a first pressure oil circuit, and a second pressure oil circuit; The integrated valve block (1) is arranged on the hopper oil tank, the two oil ports of the bidirectional hydraulic motor (2) are respectively connected to the two oil inlets of the integrated valve block (1), and the two oil ports of the bidirectional hydraulic motor (2) are respectively connected in parallel with one of the oil suction one-way valves (4), and the oil suction one-way valves (4) are respectively connected to the first pressure oil circuit and the second pressure oil circuit, and the bidirectional hydraulic motor (2) is driven to rotate forward and reverse by the driving member (3) to switch the hydraulic oil flow path and supply oil to the two oil inlets of the integrated valve block (1) respectively, thereby controlling the telescopic action of the hydraulic cylinder.

2. The hydraulic control system of the hydraulic slag bucket according to claim 1, characterized in that: The first pressure oil circuit comprises a first cartridge-type one-way valve (10), a first cartridge-type pilot relief valve (11), a first cartridge-type hydraulically controlled one-way valve (12), and a first oil outlet (13) connected through an internal oil circuit of the integrated valve block (1); The oil inlet of the first plug-in pilot relief valve (11) is connected between the bidirectional hydraulic motor (2) and the first plug-in check valve (10) through the internal oil circuit of the integrated valve block (1); the control port of the first plug-in pilot relief valve (11) is connected between the first plug-in check valve (10) and the first oil outlet (13) through the internal oil circuit of the integrated valve block (1); and the oil outlet of the first plug-in pilot relief valve (11) is connected to the oil return port through the internal oil circuit of the integrated valve block (1); The first plug-in hydraulically controlled one-way valve (12) is connected in parallel between the first plug-in one-way valve (10) and the first oil outlet (13) via the internal oil circuit of the integrated valve block (1); the control port of the first plug-in hydraulically controlled one-way valve (12) is connected in parallel to the oil inlet of the second plug-in pilot relief valve (21) of the second pressure oil circuit via the internal oil circuit of the integrated valve block (1); and the oil outlet of the first plug-in hydraulically controlled one-way valve (12) is connected to the second oil outlet (23) of the second plug-in pilot relief valve (21) via the internal oil circuit of the integrated valve block (1).

3. The hydraulic control system of the hydraulic slag bucket according to claim 2, characterized in that: The second pressure oil circuit comprises a second cartridge-type one-way valve (20), a second cartridge-type pilot relief valve (21), a second cartridge-type hydraulically controlled one-way valve (22), and a second oil outlet (23) which are connected through an internal oil circuit of the integrated valve block (1); The oil inlet of the second plug-in pilot relief valve (21) is connected between the bidirectional hydraulic motor (2) and the second plug-in check valve (20) through the internal oil circuit of the integrated valve block (1); and the control port of the second plug-in pilot relief valve (21) is connected between the second plug-in check valve (20) and the second oil outlet (23) through the internal oil circuit of the integrated valve block (1); The second plug-in hydraulically controlled one-way valve (22) is connected in parallel between the second plug-in one-way valve (20) and the second oil outlet (23) via the internal oil circuit of the integrated valve block (1); the control port of the second plug-in hydraulically controlled one-way valve (22) is connected in parallel to the oil inlet of the first plug-in pilot relief valve (11) of the first pressure oil circuit via the internal oil circuit of the integrated valve block (1); and the oil outlet of the second plug-in hydraulically controlled one-way valve (22) is connected to the oil return port via the internal oil circuit of the integrated valve block (1).

4. The hydraulic control system of the hydraulic slag bucket according to claim 3, characterized in that: The oil return port is connected to an oil return filter (5) via a hydraulic pipeline, and the oil return filter (5) is installed on the hopper oil tank.

5. The hydraulic control system of the hydraulic slag bucket according to claim 3, characterized in that: The first oil outlet (13) and the oil inlet of the first pressure oil circuit, and the second oil outlet (23) and the oil inlet of the second pressure oil circuit are respectively provided with pressure measuring joints (6).

6. The hydraulic control system of the hydraulic slag bucket according to any one of claims 1 to 5, characterized in that: The driving member (3) adopts a three-phase asynchronous motor.

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