CN222414918U - A multi-stage initial support force control system for hydraulic support - Google Patents
A multi-stage initial support force control system for hydraulic support Download PDFInfo
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- CN222414918U CN222414918U CN202420140802.1U CN202420140802U CN222414918U CN 222414918 U CN222414918 U CN 222414918U CN 202420140802 U CN202420140802 U CN 202420140802U CN 222414918 U CN222414918 U CN 222414918U
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Abstract
本实用新型涉及一种液压支架多级初撑力控制系统，其液压传感器用于检测千斤顶油缸的进油腔压力；液压支架控制器与液压传感器传输相连接收来自液压传感器的压力数据；各溢流回路的进口与换向阀的对应口相连，各溢流回路的出口与油箱相连，溢流回路包括带液控截止阀的溢流阀，电磁先导阀串设在液控截止阀的液控线上，液压支架控制器内预设需要的初撑力值，预设的初撑力值与任一溢流阀的溢流口压力相同，当液压支架控制器接收到的液压传感器的压力数据等于液压支架控制器的预设初撑力值时液压支架控制器控制对应的电磁先导阀开启，电磁先导阀开启连通相应的液控截止阀的液控线；利用溢流阀确保千斤顶油缸的进油腔压力能达到需要的初撑力，实现对初撑力的有效控制。
The utility model relates to a multi-stage initial support force control system for a hydraulic support, wherein a hydraulic sensor is used to detect the pressure of an oil inlet chamber of a jack oil cylinder; a hydraulic support controller is connected to the hydraulic sensor for transmission to receive pressure data from the hydraulic sensor; an inlet of each overflow circuit is connected to a corresponding port of a reversing valve, an outlet of each overflow circuit is connected to an oil tank, the overflow circuit comprises an overflow valve with a hydraulically controlled stop valve, an electromagnetic pilot valve is arranged in series on a hydraulic control line of the hydraulically controlled stop valve, a required initial support force value is preset in the hydraulic support controller, the preset initial support force value is the same as the overflow port pressure of any overflow valve, when the pressure data of the hydraulic sensor received by the hydraulic support controller is equal to the preset initial support force value of the hydraulic support controller, the hydraulic support controller controls the corresponding electromagnetic pilot valve to open, and the electromagnetic pilot valve opens the hydraulic control line connected to the corresponding hydraulically controlled stop valve; the overflow valve is used to ensure that the pressure of the oil inlet chamber of the jack oil cylinder can reach the required initial support force, thereby realizing effective control of the initial support force.
Description
Technical Field
The utility model relates to a hydraulic control system, in particular to a hydraulic support multi-stage primary supporting force control system, which belongs to a hydraulic control system for underground coal mines.
Background
The hydraulic support is a structure for controlling the mine pressure of the coal face, and the pressure on the mine face acts on the hydraulic support. The hydraulic support is supported by the jack cylinder. The oil inlet cavity of the jack oil cylinder is used for oil inlet, the hydraulic support is lifted up to support the mine surface, and when the oil return cavity of the jack oil cylinder is used for oil inlet, the hydraulic support is retracted. In the lifting process of the mining hydraulic support, namely in the oil feeding process of the oil feeding cavity of the jack cylinder, the supporting effect of the hydraulic support on the top of the coal mine can be affected no matter the initial supporting force of the jack cylinder is insufficient or excessive, the control of the initial supporting force is insufficient in the prior art, the poor supporting effect of the hydraulic support on the top of the coal mine is caused, and the situation needs to be solved.
Disclosure of utility model
The utility model aims to provide a hydraulic support multi-stage primary supporting force control system which is used for solving the problem that in the prior art, the primary supporting force is insufficient or excessive in the lifting process of a mining hydraulic support.
In order to solve the problems, the hydraulic support multi-stage primary supporting force control system adopts the following technical scheme that the hydraulic support multi-stage primary supporting force control system comprises a jack cylinder, wherein an oil inlet cavity and an oil return cavity of the jack cylinder are connected with a hydraulic pump and an oil tank through reversing valves, and the hydraulic support multi-stage primary supporting force control system further comprises:
the hydraulic sensor is used for detecting the pressure of an oil inlet cavity of the jack cylinder;
The hydraulic support controller is in transmission connection with the hydraulic sensor and receives pressure data from the hydraulic sensor;
the overflow unit comprises at least three overflow loops, each overflow loop is connected in parallel, an inlet of each overflow loop is connected with a corresponding port of the reversing valve, an outlet of each overflow loop is connected with the oil tank, the overflow loops comprise overflow valves with hydraulic control stop valves, and overflow port pressures of the overflow valves are different;
The electromagnetic pilot valve is arranged on a hydraulic control line of the hydraulic control stop valve in series, a required initial supporting force value is preset in the hydraulic support controller, the preset initial supporting force value is the same as the overflow port pressure of any overflow valve, when the pressure data of the hydraulic sensor received by the hydraulic support controller is equal to the preset initial supporting force value of the hydraulic support controller, the hydraulic support controller controls the corresponding electromagnetic pilot valve to be opened, and the electromagnetic pilot valve is opened to be communicated with the hydraulic control line of the corresponding hydraulic control stop valve;
The hydraulic control check valve is directly connected with the oil inlet cavity of the jack oil cylinder and is communicated with the oil inlet cavity, and the hydraulic control line of the hydraulic control check valve is connected with the oil outlet cavity of the jack oil cylinder.
The electromagnetic pilot valve is a two-position three-way electromagnetic reversing valve, and a hydraulic control line of the hydraulic control stop valve is connected with the hydraulic pump or the oil tank through reversing of the electromagnetic pilot valve.
The hydraulic control stop valve is a two-position two-way normally-closed hydraulic control reversing valve.
The reversing valve is a three-position four-way electromagnetic reversing valve.
The median function of the reversing valve is of a y type.
The two jack cylinders are connected in parallel, an oil path from the hydraulic control speed regulating valve is divided into two paths which are respectively connected with oil inlet cavities of the two jack cylinders, and the two jack cylinders are respectively provided with a hydraulic control one-way valve.
The overflow unit comprises at least three overflow loops, wherein the overflow loops are connected in parallel, the overflow pressures of the overflow valves of different overflow units are different, the different overflow pressures correspond to different initial supporting forces, after the required initial supporting force is achieved, the corresponding overflow valves are opened, the multi-stage control of the initial supporting force can be realized, the pressure maintaining of the hydraulic control one-way valve is realized, the pressure of the oil inlet cavity of the jack cylinder is ensured to be reduced, the pressure is not fluctuated, the pressure of the oil inlet cavity of the jack cylinder is stabilized by the overflow valves, the pressure of the oil inlet cavity of the jack cylinder is ensured to reach the inlet pressure of the overflow valves, namely, the pressure of the oil inlet cavity of the jack cylinder is ensured to reach the required initial supporting force, and the effective control of the initial supporting force is realized.
The reversing valve is a three-position four-way electromagnetic reversing valve, and is convenient to control.
The two jack cylinders are connected in parallel, so that oil can be supplied to the two jack cylinders at the same time, a system is saved, and the initial supporting force of the two jack cylinders can be synchronously controlled.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following briefly describes the drawings that are required to be used in the embodiments:
FIG. 1 is a diagram of a hydraulic system according to an embodiment of the present utility model;
FIG. 2 is a system diagram of the overflow unit of FIG. 1;
Fig. 3 is an electrical control block diagram of the present utility model.
Detailed Description
In order to make the technical purpose, technical scheme and beneficial effect of the present utility model more clear, the technical scheme of the present utility model is further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the specific embodiment of the hydraulic support multi-stage initial supporting force control system, in fig. 1, 2 and 3, two jack cylinders 1 are arranged, and the two jack cylinders 1 are connected in parallel. The reversing valve 2 is a three-position four-way electromagnetic reversing valve, wherein the position can be y-shaped, and the middle position is decompressed. The P port of the reversing valve 2 is connected with the hydraulic pump, the O port is connected with the oil tank, one of the other two ports of the reversing valve is divided into three paths, two paths of the reversing valve are respectively connected with the oil inlet cavities of the two jack cylinders 1 through a hydraulic control one-way valve 4, the oil inlet cavity of the jack cylinder 1 is a rodless cavity, and the last path of the reversing valve is connected with the inlet of the overflow unit. The outlets of the oil outlet cavities of the two jack cylinders 1 are connected with the last port of the reversing valve after being converged, and the hydraulic control line of the hydraulic control one-way valve 4 is connected with the oil outlet cavity of the jack cylinder, so to speak, the port connected with the reversing valve and the oil outlet cavity of the jack cylinder 1.
The overflow unit is provided with four overflow loops, each overflow loop is connected in parallel, and an inlet of each overflow loop is connected with a corresponding port of the reversing valve, wherein the corresponding port refers to a port of the reversing valve connected with an oil inlet cavity of the jack cylinder 1. The outlet of each overflow loop is connected with an oil tank, the overflow loop is provided with an overflow valve 8 with a hydraulic control stop valve, the overflow port pressure of each overflow valve 8 is different, an electromagnetic pilot valve 5 is connected in series on a hydraulic control line of the hydraulic control stop valve 3, the hydraulic control port of the hydraulic control stop valve 3 is connected with the oil tank and the hydraulic pump through the electromagnetic pilot valve 5, and the electromagnetic pilot valve 5 is a two-position three-way electromagnetic reversing valve. The long port of the electromagnetic pilot valve 5 is connected with the hydraulic control port of the hydraulic control stop valve 3, and the other two ports of the electromagnetic pilot valve 5 are respectively connected with the hydraulic pump and the oil tank.
The hydraulic support controller 6 and the hydraulic sensor 7 are also arranged in the system, the hydraulic sensor 7 is used for detecting the pressure of an oil inlet cavity of the jack cylinder, the hydraulic support controller 6 is a commercial component, the hydraulic support controller belongs to a mature component, the hydraulic support controller can receive pressure data from the hydraulic sensor 7, an initial supporting force value is preset in the hydraulic support controller 6, the initial supporting force value is set according to the requirement, the set initial supporting force value is the same as the overflow pressure of an overflow valve, when the pressure data of the hydraulic sensor received by the hydraulic support controller is equal to the preset initial supporting force value of the hydraulic support controller, the hydraulic support controller 6 controls the electromagnetic valve 5 to be opened, after the electromagnetic pilot valve 5 is opened, a hydraulic control line of the hydraulic control stop valve 3 is connected with a hydraulic pump, the overflow valve 8 starts to operate, namely, the hydraulic support controller 6 controls the electromagnetic pilot valve 5 to change direction, a hydraulic control port of the hydraulic control stop valve 3 is connected with an outlet of the hydraulic pump through the electromagnetic pilot valve 5, the overflow valve 8 is opened, the outlet pressure of the hydraulic pump is determined, the outlet pressure of the hydraulic pump is the same as the initial supporting force required to be replaced, and the initial supporting force is different from the initial supporting force to realize multiple levels. The hydraulic control one-way valve can maintain pressure, and the fluctuation of an oil inlet cavity of the jack oil cylinder 1 is prevented.
The electromagnetic pilot valve in the above embodiment is a two-position three-way electromagnetic reversing valve, and in other embodiments, the electromagnetic pilot valve may be any valve that can realize the reversing between the hydraulic control line of the hydraulic control stop valve and the high hydraulic end and the low hydraulic end through electric control reversing, for example, a three-position four-way electromagnetic reversing valve.
The hydraulic control line of the hydraulic control stop valve in the above embodiment is controlled by the hydraulic pump of the system, and a high hydraulic pressure source can be additionally arranged for control.
The reversing valve in the above embodiment is a three-position four-way electromagnetic reversing valve, and in other embodiments, the reversing valve can also be in other forms.
The median function of the reversing valve in the above embodiment is of the y type, and can be depressurized when not in operation, and in other embodiments, the median function of the reversing valve can be depressurized.
In the above embodiment, two jack cylinders are connected in parallel, which can be controlled simultaneously, and in other embodiments, different hydraulic circuits can be set for separate control.
The hydraulic control stop valve in the embodiment is a two-position two-way normally-closed hydraulic control reversing valve.
It should be finally noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model and that any equivalent substitutions and modifications or partial substitutions without departing from the spirit and scope of the present utility model shall be covered by the scope of the claims of the present utility model.
Claims (6)
1. The utility model provides a multistage preliminary bracing force control system of hydraulic support, includes the jack hydro-cylinder, its characterized in that, the oil inlet chamber and the oil return chamber of jack hydro-cylinder pass through the switching-over valve and link to each other with hydraulic pump and oil tank, still includes:
the hydraulic sensor is used for detecting the pressure of an oil inlet cavity of the jack cylinder;
The hydraulic support controller is in transmission connection with the hydraulic sensor and receives pressure data from the hydraulic sensor;
the overflow unit comprises at least three overflow loops, each overflow loop is connected in parallel, an inlet of each overflow loop is connected with a corresponding port of the reversing valve, an outlet of each overflow loop is connected with the oil tank, the overflow loops comprise overflow valves with hydraulic control stop valves, and overflow port pressures of the overflow valves are different;
The electromagnetic pilot valve is arranged on a hydraulic control line of the hydraulic control stop valve in series, a required initial supporting force value is preset in the hydraulic support controller, the preset initial supporting force value is the same as the overflow port pressure of any overflow valve, when the pressure data of the hydraulic sensor received by the hydraulic support controller is equal to the preset initial supporting force value of the hydraulic support controller, the hydraulic support controller controls the corresponding electromagnetic pilot valve to be opened, and the electromagnetic pilot valve is opened to be communicated with the hydraulic control line of the corresponding hydraulic control stop valve;
The hydraulic control check valve is directly connected with the oil inlet cavity of the jack oil cylinder and is communicated with the oil inlet cavity, and the hydraulic control line of the hydraulic control check valve is connected with the oil outlet cavity of the jack oil cylinder.
2. The hydraulic support multistage primary support force control system according to claim 1, wherein the electromagnetic pilot valve is a two-position three-way electromagnetic reversing valve, and a hydraulic control line of the hydraulic control stop valve is connected with the hydraulic pump or the oil tank through reversing of the electromagnetic pilot valve.
3. The hydraulic support multi-stage primary support force control system of claim 2, wherein the pilot operated shut-off valve is a two-position two-way normally closed pilot operated reversing valve.
4. The hydraulic support multi-stage thrust control system of claim 3, wherein the reversing valve is a three-position four-way electromagnetic reversing valve.
5. The hydraulic bracket multi-stage thrust control system of claim 4 wherein the directional valve has a y-shaped neutral position.
6. The multi-stage primary support force control system according to any one of claims 1 to 5, wherein the number of the jack cylinders is two, the two jack cylinders are connected in parallel, an oil path from the hydraulic control speed regulating valve is divided into two paths and is respectively connected with oil inlet cavities of the two jack cylinders, and the hydraulic control one-way valves are respectively arranged corresponding to the two jack cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420140802.1U CN222414918U (en) | 2024-01-19 | 2024-01-19 | A multi-stage initial support force control system for hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420140802.1U CN222414918U (en) | 2024-01-19 | 2024-01-19 | A multi-stage initial support force control system for hydraulic support |
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| CN222414918U true CN222414918U (en) | 2025-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202420140802.1U Active CN222414918U (en) | 2024-01-19 | 2024-01-19 | A multi-stage initial support force control system for hydraulic support |
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| CN (1) | CN222414918U (en) |
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- 2024-01-19 CN CN202420140802.1U patent/CN222414918U/en active Active
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