Hydraulic system of grate cooler

Abstract

The utility model relates to the technical field of grate cooler driving systems, in particular to a grate cooler hydraulic system which comprises a main oil tank used for containing hydraulic oil, a main reversing valve used for conveying the hydraulic oil into branch pipelines respectively and an oil conveying main pipe connected between the main reversing valve and the main oil tank. The output end of the main reversing valve communicates with a plurality of branch pipelines through an oil conveying main pipe, hydraulic cylinders used for driving a grate plate of the grate cooler to move are arranged on the branch pipelines, and the system further comprises a redundant oil pumping assembly, a single-row oil inlet control valve, an oil distributing and conveying assembly and a monitoring unit; oil pressure and the like of each pipeline are detected through the monitoring unit, standby oil conveying can be carried out through the redundant oil pumping assembly and the oil distributing and conveying assembly once abnormity or faults occur, normal conveying of hydraulic oil is guaranteed, meanwhile, the faults can be independently maintained conveniently, the whole hydraulic system does not need to be shut down, and the working efficiency is improved. The operation efficiency of the grate cooler is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of grate cooler drive systems, and in particular to a hydraulic system for a grate cooler. Background Technology

[0002] The grate cooler is a crucial main equipment in the clinker calcination system of a cement plant. Its primary function is to cool and transport cement clinker, while also providing hot air for the rotary kiln and decomposition furnace. It is a key piece of equipment for heat recovery in the calcination system. Taking a section of the grate bed as an example, the hydraulic pump draws hydraulic oil from the oil tank and injects it into the proportional directional valve through the cone valve unit via the pump outlet. When the proportional directional valve is working, the position of the main valve core is continuously switched by the program control, injecting oil into the rod chamber or rodless chamber of the hydraulic cylinder, which pushes the piston of the hydraulic cylinder to reciprocate. The hydraulic cylinder then transmits the power to the movable frame through the transmission shaft, thereby realizing the reciprocating motion of the movable grate bed.

[0003] Existing grate cooler hydraulic systems typically employ centralized control, lacking independent control for individual hydraulic systems. When a problem occurs in a particular hydraulic system, such as internal leakage in the hydraulic cylinder, pipe rupture, or valve failure, the fault can quickly spread to other systems through oil conduction because the entire system's oil circuits are interconnected. Once a fault occurs in a particular hydraulic system, due to the lack of rapid isolation methods for the faulty system, maintenance personnel often need to shut down the entire grate cooler hydraulic system before they can perform maintenance operations, impacting production efficiency.

[0004] Based on the above situation, it is necessary to design a hydraulic system for the grate cooler to solve the above problems. Utility Model Content

[0005] This utility model provides a hydraulic system for a grate cooler to solve the problem in the prior art that the grate cooler needs to be shut down for maintenance, which affects work efficiency.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] A hydraulic system for a grate cooler includes a main oil tank for holding hydraulic oil, a main directional valve for delivering hydraulic oil to various branch pipelines, and a main oil supply pipe connecting the main directional valves and the main oil tank. A main hydraulic pump is installed on the main oil supply pipe. The output end of the main directional valve is connected to multiple branch pipelines via the main oil supply pipe. Hydraulic cylinders for driving the movement of the grate cooler's grate plates are installed on each branch pipeline. The system also includes a redundant oil extraction assembly, a single-row oil inlet control valve, an oil distribution and delivery assembly, and a monitoring unit. The redundant oil extraction assembly is located at the oil supply... Between the main pipeline and the main oil tank, hydraulic oil is supplied to the main pipeline for backup. The single-row inlet control valve is located on the branch pipeline and is used to independently control the oil supply of each row of grate hydraulic cylinders. The oil distribution and delivery assembly is located upstream of the main directional valve, and its output end is connected to multiple branch pipelines to deliver hydraulic oil to the branch pipelines, bypassing the main directional valve. The monitoring unit includes pressure sensors and flow sensors installed in each oil pipeline to detect the oil pressure and flow rate of each oil pipeline.

[0008] Preferably, the monitoring unit further includes a controller, which controls the opening and closing of the redundant oil pumping assembly, the single-row oil inlet control valve, and the oil distribution and delivery assembly when the controller receives signals from the pressure sensor and the flow sensor that are not within the set threshold range.

[0009] Preferably, the oil distribution and conveying assembly includes an oil distribution branch pipe connected to the main oil pipeline, the output end of the oil distribution branch pipe is connected to multiple oil distribution manifolds, and the multiple oil distribution manifolds are respectively connected to multiple branch pipelines, and the oil distribution branch pipe is equipped with an oil distribution valve.

[0010] Preferably, the branch pipe is provided with a pressure relief pipe, and the pressure relief pipe is provided with a pressure relief valve electrically connected to the controller.

[0011] Preferably, the redundant pumping assembly includes multiple connecting pipes that connect the main oil supply pipe and the main oil tank, as well as a hydraulic pump installed on the connecting pipes.

[0012] Preferably, the return oil end of the hydraulic cylinder is connected to the main oil tank via a return oil pipe, and a return oil control valve is provided on the return oil pipe.

[0013] The beneficial effects of this utility model are: by monitoring the oil pressure of each pipeline through the monitoring unit, in the event of an abnormality or malfunction, backup oil supply can be provided through redundant oil pumping components and oil distribution and conveying components to ensure the normal delivery of hydraulic oil. At the same time, it is also convenient to carry out individual maintenance of faults without shutting down the entire hydraulic system, thereby improving the operating efficiency of the grate cooler. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the prior art structure provided for this utility model;

[0016] Figure 2 This is a structural schematic diagram of the present invention;

[0017] Figure 3 A system block diagram provided for this utility model.

[0018] In the diagram, 1. Main oil tank; 2. Branch pipeline; 21. Single-row inlet control valve; 22. Pressure relief pipe; 23. Pressure relief valve; 3. Main directional valve; 31. Main oil supply pipe; 4. Main oil supply pipe; 41. Main hydraulic pump; 5. Hydraulic cylinder; 6. Pressure sensor; 61. Flow sensor; 62. Controller; 7. Oil supply branch pipe; 71. Oil distribution manifold; 72. Oil distribution valve; 8. Connecting pipeline; 81. Branch hydraulic pump; 9. Return oil pipe; 91. Return oil control valve. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0020] A hydraulic system for a grate cooler, as described in the following reference. Figure 1 As shown in the schematic diagram of the existing technology, it includes a main oil tank 1 for holding hydraulic oil, a main directional valve 3 for delivering hydraulic oil to various branch pipes 2, and a main oil supply pipe 4 connecting the main directional valve 3 and the main oil tank 1. A main hydraulic pump 41 is installed on the main oil supply pipe 4. The output end of the main directional valve 3 is connected to multiple branch pipes 2 through the main oil supply pipe 31. Hydraulic cylinders 5 for driving the movement of the grate plates of the grate cooler are installed on the branch pipes 2. Each hydraulic cylinder 5 corresponds to a row of grate plates of the grate cooler. The main hydraulic pump 41 or main directional valve 3 malfunctions, which reduces the hydraulic oil supply capacity of the main oil tank 1, resulting in insufficient or absent hydraulic oil pressure in each hydraulic cylinder 5. This can cause abnormal operation of the grate plates in a certain row of grate coolers. Alternatively, if a hydraulic cylinder 5 on a branch pipe 2 needs to be repaired separately, the entire hydraulic system must be shut down to prevent oil leakage, which affects work efficiency. Therefore, this solution addresses the above problems as follows:

[0021] Reference Figure 2-3 As shown, a redundant oil extraction assembly for supplying hydraulic oil to the main oil tank is provided between the main oil pipeline 4 and the main oil tank 1. A single-row oil extraction assembly is provided on the branch pipeline 2 for independently controlling the oil intake of each row of grate hydraulic cylinders 5. An oil distribution assembly is provided at the upstream end of the main directional valve 3, and its output end is connected to multiple branch pipelines 2 to transport hydraulic oil around the main directional valve 3 to the branch pipeline 2. It also includes a monitoring unit. Pressure sensors 6 and flow sensors 61 are also provided in each oil pipeline to detect the oil pressure and flow rate of each oil pipeline. When the pressure sensors 6 and flow sensors 61 detect that the oil pressure of each oil pipeline is not within the set threshold range, they send a signal to the controller 62. The controller 62 controls the opening and closing of the redundant oil extraction assembly, the single-row oil intake control valve 21 and the oil distribution assembly.

[0022] Specifically, pressure sensors 6 and flow sensors 61 are installed on the main oil supply pipe 4, one upstream of the main hydraulic pump 41 and the other upstream of the main directional valve 3. When the pressure sensor 6 or flow sensor 61 upstream of the main hydraulic pump 41 detects an abnormality in the oil supply pipe 4, such as excessively high oil pressure, it may be due to a weakened pumping capacity of the main hydraulic pump 41. In this case, to ensure the normal delivery of subsequent hydraulic oil, a signal is sent to the controller 62, which then controls the redundant pumping assembly to start pumping oil into the main directional valve 3. Conversely, when the pressure sensor 6 or flow sensor 61 upstream of the main directional valve 3 detects an abnormal signal, then... If the main directional valve 3 malfunctions, the controller 62 can control the oil distribution and delivery assembly to bypass the main directional valve 3 and directly deliver hydraulic oil into the branch pipe 2, thus avoiding affecting the hydraulic cylinder 5's drive of the grate. When the flow sensor 61 and pressure sensor 6 installed on the branch pipe 2 detect abnormal oil pressure in the branch pipe 2, indicating a malfunction of the hydraulic cylinder 5 or an abnormal load on the corresponding grate due to material accumulation, the flow rate and pressure of the inlet of that row can be adjusted separately through the single-row oil inlet control valve 21 to maintain stable operation of the grate without affecting other rows. Alternatively, the hydraulic cylinder 5 on the branch pipe 2 can be repaired separately after the branch pipe 2 is closed by the single-row oil inlet control valve 21.

[0023] Reference Figure 2As shown, the oil distribution and conveying assembly further includes an oil distribution branch pipe 7 connected to the main oil supply pipe 4. The output end of the oil distribution branch pipe 7 is connected to multiple oil distribution manifolds 71, and the multiple oil distribution manifolds 71 ​​are respectively connected to multiple branch pipelines 2. The oil distribution branch pipe 7 is equipped with an oil distribution valve 72. When the monitoring unit detects an abnormality in the corresponding oil supply pipeline, the controller 62 controls the oil distribution valve 72 to open and the main reversing valve 3 to close. At this time, the hydraulic oil in the main oil supply pipe 4 enters the multiple oil distribution manifolds 71 ​​through the oil distribution branch pipe 7, and then directly enters the corresponding branch pipeline 2 to transport oil to the hydraulic cylinder 5, thereby facilitating the maintenance of the main reversing valve 3.

[0024] Reference Figure 2 As shown, the redundant oil pumping assembly further includes a connecting pipe 8 connecting the main oil supply pipe 4 and the main oil tank 1, and a hydraulic pump 81 installed on the connecting pipe 8. When the main hydraulic pump 41 fails, the controller 62 controls the hydraulic pump 81 to start and supply oil to the main directional valve 3. The number of connecting pipes 8 and hydraulic pumps 81 is at least two, which can provide multiple backup oil pumping channels to ensure normal oil delivery and avoid the inability to deliver oil due to the failure of one hydraulic pump 81.

[0025] Reference Figure 2 As shown, the branch pipe 2 is further provided with a pressure relief pipe 22, and the pressure relief pipe 22 is provided with a pressure relief valve 23 electrically connected to the controller 62. The output end of the pressure relief pipe 22 can be connected to the main oil tank 1 or to a temporary oil tank. When the load on the grate plate is large due to material accumulation or the hydraulic cylinder 5 is stuck, causing the oil pressure in the branch pipe 2 to exceed the set threshold, the pressure relief valve 23 can be opened to open the pressure relief pipe 22 to release the oil, reduce the oil pressure in the branch pipe 2, and ensure safety.

[0026] Reference Figure 2 As shown, furthermore, each hydraulic cylinder 5 is connected to the main oil tank 1 via a return oil pipe 9, and a return oil control valve 91 is provided on the return oil pipe 9. When the return oil control valve 91 is opened, oil circulation is realized between the return oil end of the hydraulic cylinder 5 and the main oil tank 1, and between the main oil tank 1 and the inlet end of the hydraulic cylinder 5.

Claims

1. A hydraulic system of a grate cooler, comprising a main oil tank (1) for containing hydraulic oil, a main reversing valve (3) for delivering hydraulic oil into each branch pipeline (2) respectively, and a main oil delivery pipeline (4) connected between the main reversing valve (3) and the main oil tank (1), wherein a main hydraulic pump (41) is arranged on the main oil delivery pipeline (4), and the output end of the main reversing valve (3) is connected with the branch pipelines (2) through a main oil delivery pipeline (31) respectively, and a hydraulic cylinder (5) for driving the movement of the grate plate of the grate cooler is arranged on the branch pipeline (2), characterized in that, Also included are; A redundant oil pumping assembly arranged between the oil delivery main pipe (4) and the main oil tank (1) for standby delivery of hydraulic oil into the oil delivery main pipe (4); A single-column oil inlet control valve (21) arranged on the branch pipe (2) for independent control of the oil inlet of each column of grate bed hydraulic cylinders (5); An oil distribution delivery assembly arranged at the upstream end of the main reversing valve (3) and having its output end connected to a plurality of branch pipes (2) for delivering hydraulic oil into the branch pipes (2) bypassing the main reversing valve (3); A monitoring unit including pressure sensors (6) and flow sensors (61) installed in each oil delivery pipeline for detecting the oil pressure and flow of each oil delivery pipeline.

2. A hydraulic system for a grate cooler according to claim 1, characterized in that The monitoring unit further includes a controller (62) for controlling the opening and closing of the redundant oil pumping assembly, the single-column oil inlet control valve (21) and the oil distribution delivery assembly when the signals received by the controller (62) from the pressure sensors (6) and the flow sensors (61) are not within the set threshold range.

3. A hydraulic system for a grate cooler according to claim 1, characterized in that, The oil distribution delivery assembly includes an oil distribution pipe (7) connected to the oil delivery main pipe (4), the output end of the oil distribution pipe (7) is connected to a plurality of oil distribution manifolds (71), and the plurality of oil distribution manifolds (71) are respectively connected to a plurality of branch pipes (2), and the oil distribution pipe (7) is provided with an oil distribution valve (72).

4. A hydraulic system for a grate cooler according to claim 2, characterized in that, The branch pipe (2) is provided with a pressure relief pipe (22), and the pressure relief pipe (22) is provided with a pressure relief valve (23) electrically connected to the controller (62).

5. A hydraulic system for a grate cooler according to claim 1, characterized in that, The redundant oil pumping assembly includes a plurality of connection pipes (8) connected between the oil delivery main pipe (4) and the main oil tank (1), and a distribution hydraulic pump (81) arranged on the connection pipe (8).

6. A hydraulic system for a grate cooler according to claim 1, characterized in that, The return oil end of the hydraulic cylinder (5) is connected to the main oil tank (1) through a return oil pipe (9), and the return oil pipe (9) is provided with a return oil control valve (91).

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