CN215444097U - Novel mining hydraulic support electrohydraulic control reversing valve device - Google Patents
Novel mining hydraulic support electrohydraulic control reversing valve device Download PDFInfo
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- CN215444097U CN215444097U CN202121963829.3U CN202121963829U CN215444097U CN 215444097 U CN215444097 U CN 215444097U CN 202121963829 U CN202121963829 U CN 202121963829U CN 215444097 U CN215444097 U CN 215444097U
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Abstract
The utility model relates to a novel mining hydraulic support electrohydraulic control reversing valve device, which is technically characterized in that: the main liquid inlet pipe is communicated with the upper cavity of the liquid inlet oil cylinder through an energy exchange valve, the main liquid inlet pipe is communicated with the liquid supplementing valve through a filter, and the underground main liquid inlet pipe is also communicated with the lower cavity and the main valve of the liquid return oil cylinder; two valve cores of the pilot valve are connected with the energy exchange valve, the liquid supplementing valve and the liquid discharging valve, one pipeline of the pilot valve is communicated with a main liquid return pipe in the well through a one-way valve, the other pipeline of the pilot valve is communicated with the liquid supplementing valve, the other end of the liquid supplementing valve and the lower cavity of the liquid inlet oil cylinder are communicated with the electromagnetic pilot valve and the main valve through the one-way valve, the main valve is further communicated with the liquid discharging valve, the upper cavity of the liquid return oil cylinder and the filter through the electromagnetic pilot valve and the one-way valve, and the filter is communicated with the lower cavity of the liquid inlet oil cylinder through the one-way valve. The utility model has reasonable design, greatly reduces the influence of the quality of the mining emulsion on the electromagnetic pilot valve in the electro-hydraulic control reversing valve, and prolongs the service life of the electromagnetic pilot valve.
Description
Technical Field
The utility model belongs to the technical field of coal mine automation, and relates to a hydraulic support control device, in particular to a novel mining hydraulic support electro-hydraulic control reversing valve device.
Background
At present, along with the popularization of the automatic working face of the coal mine, the valve for the hydraulic support for the coal mine is gradually replaced by an electro-hydraulic control mode from the original manual control mode.
The hydraulic support is typically controlled by a hydraulic controller with an electro-hydraulically controlled directional valve. The electro-hydraulic control reversing valve comprises an electromagnetic pilot valve and a main valve, and in order to ensure the normal work of the electromagnetic pilot valve, higher requirements are provided for the cleanliness of a working medium (emulsion) used by the electromagnetic pilot valve. However, in actual work, the requirement on the cleanliness of the emulsion is not usually provided, and furthermore, the understanding and the control of the cleanliness of the emulsion in the electro-hydraulic control system in some coal mines are insufficient, so that a large amount of impurities exist in the emulsion frequently, and the damage of the pilot valve can be caused when the emulsion with a large amount of impurities enters the electro-hydraulic control reversing valve, so that the service life of the product is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a novel mining hydraulic support electro-hydraulic control reversing valve device, which solves the problem of influence of emulsion on an electromagnetic pilot valve by adopting a pilot valve control liquid internal circulation mode.
The utility model solves the technical problems in the prior art by adopting the following technical scheme:
a novel electro-hydraulic control reversing valve device for a mining hydraulic support comprises a pilot valve, an energy exchange valve, a liquid inlet oil cylinder, a liquid return oil cylinder, a liquid supplementing valve, a liquid discharging valve, four one-way valves and two filters; the underground main liquid inlet pipe is communicated with the upper cavity of the liquid inlet oil cylinder through an energy exchange valve, the underground main liquid inlet pipe is communicated with the liquid supplementing valve through a first filter, and the underground main liquid inlet pipe is also communicated with the lower cavity and the main valve of the liquid return oil cylinder; one valve core of the pilot valve is connected with and controls the energy conversion valve, the other valve core of the pilot valve is respectively connected with and controls the liquid supplementing valve and the liquid discharging valve, one pipeline of the pilot valve is communicated with the underground main liquid returning pipe through a fourth one-way valve, the other pipeline of the pilot valve is communicated with the liquid supplementing valve, the other end of the liquid supplementing valve and the lower cavity of the liquid inlet oil cylinder are both communicated with the liquid inlet end of a third one-way valve, the liquid outlet end of the third one-way valve is communicated with a main valve through an electromagnetic pilot valve, and the main valve is connected with and controls the hydraulic support; the main valve is also communicated with the liquid inlet end of a second one-way valve through an electromagnetic pilot valve, the liquid outlet end of the second one-way valve is communicated with a liquid discharge valve, the upper cavity of a liquid return oil cylinder and a second filter, and the other end of the second filter is communicated with the lower cavity of the liquid inlet oil cylinder through a first one-way valve.
Further, the liquid inlet oil cylinder and the liquid return oil cylinder are respectively provided with a liquid inlet position sensor and a liquid return position sensor, the liquid inlet position sensor and the liquid return position sensor are both connected with the support controller and transmit the detected liquid level to the support controller, and the support controller controls the two valve cores of the pilot valve to act according to the liquid level.
Further, the first filter and the second filter are both 25 μm filters.
The utility model has the advantages and positive effects that:
1. the utility model connects the pilot valve with the energy-exchanging valve, the liquid supplementing valve and the liquid discharging valve, and adds two filters in the internal circulation of the pilot valve control liquid, thus greatly reducing the influence of the quality of the mining emulsion on the electromagnetic pilot valve in the electro-hydraulic control reversing valve, reducing the damage rate of the electromagnetic pilot valve and prolonging the service life of the electromagnetic pilot valve.
2. The liquid inlet position sensor and the liquid return position sensor are respectively arranged on the liquid inlet oil cylinder and the liquid return oil cylinder, the detected liquid level is sent to the bracket controller, the bracket controller controls the action of the energy exchange valve, the liquid supplementing valve and the liquid discharging valve, the full-automatic control function of liquid inlet and liquid supplementing is realized, and the control is flexible, accurate and reliable.
Drawings
Fig. 1 is a structural diagram of the novel mining hydraulic support electrohydraulic reversing valve device.
1-a fourth one-way valve, 2-an energy exchange valve, 3-a first filter, 4-a pilot valve, 5-a liquid supplementing valve, 6-a liquid inlet position sensor, 7-a liquid inlet oil cylinder, 8-a first one-way valve, 9-a second filter, 10-a third one-way valve, 11-a second one-way valve, 12-a liquid discharge valve, 13-a liquid return oil cylinder and 14-a liquid return position sensor.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A novel mining hydraulic support electro-hydraulic control reversing valve device is shown in figure 1 and comprises a pilot valve 4, a power change valve 2, a liquid inlet oil cylinder 7, a liquid return oil cylinder 13, a liquid supplementing valve 5, a liquid discharge valve 12, a first one-way valve 8, a second one-way valve 11, a third one-way valve 10, a fourth one-way valve 1, a first filter 3 and a second filter 9. The main feed liquor pipe in pit is linked together through the epicoele of the valve 2 and the feed liquor hydro-cylinder 7 of changing energy, main feed liquor pipe in pit is linked together through first filter 3 and fluid infusion valve 5, and simultaneously, main feed liquor pipe in pit still is linked together with the cavity of resorption and the main valve of returning liquid hydro-cylinder 14. One valve core of the pilot valve 4 is connected with the energy exchange valve 2 for controlling the action of the energy exchange valve, the other valve core of the pilot valve 4 is respectively connected with the liquid supplementing valve 5 and the liquid discharging valve 12 for controlling the action of the energy exchange valve, one pipeline of the pilot valve 4 is communicated with a downhole main liquid return pipe through a fourth one-way valve 1, and the fourth one-way valve 1 realizes the function of protecting the pilot valve 4; the other pipeline of the pilot valve 4 is communicated with a liquid supplementing valve 5, the other end of the liquid supplementing valve 5 and the lower cavity of the liquid inlet oil cylinder 7 are respectively communicated with the liquid inlet end of a third one-way valve 10, the liquid outlet end of the one-way valve 10 is connected with a main valve through an electromagnetic pilot valve, and the main valve is connected with a hydraulic support. The liquid inlet end of the second one-way valve 2 is communicated with the main valve through an electromagnetic pilot valve, the liquid outlet end of the second one-way valve 8 is communicated with the liquid discharge valve 12, the upper cavity of the liquid return oil cylinder 13 and the second filter 9, and the other end of the second filter 9 is communicated with the lower cavity of the liquid inlet oil cylinder 7 through the first one-way valve 8.
A liquid inlet position sensor 6 and a liquid return position sensor 14 are respectively arranged on a liquid inlet oil cylinder 7 and a liquid return oil cylinder 14, the liquid inlet position sensor 6 and the liquid return position sensor 14 transmit detected liquid levels of the liquid inlet oil cylinder 7 and the liquid return oil cylinder 14 to a support controller, the support controller controls the action of a pilot valve 4 after analyzing the liquid levels, the action of a power valve 2 is controlled through one path of valve element of the pilot valve 4, and the action of a liquid supplementing valve 5 and the action of a liquid discharging valve 12 are controlled through the other path of valve element of the pilot valve 4.
In the present embodiment, the first filter 3 and the second filter 9 each employ a 25 μm filter.
The working principle of the utility model is as follows: high-pressure liquid in the underground main liquid inlet pipe enters the liquid inlet oil cylinder 7 through the energy exchange valve 2, and the two side areas of a piston in the liquid inlet oil cylinder 7 are equal, so that the system pressure is equivalently transmitted to emulsion in a closed system, and the pressure of the closed system is equal to the underground pressure. When the pilot valve 4 acts, the high-pressure liquid pushes the liquid inlet oil cylinder 7, so that emulsion at the rear end of the liquid inlet oil cylinder 7 passes through the third one-way valve 10 and drives the main valve core to be opened through the electromagnetic pilot valve; when the pilot valve 4 is closed, the emulsion with the main valve core opened is driven, the second one-way valve 11 pushes the liquid return oil cylinder 13 to move, and the emulsion at the rear end of the liquid return oil cylinder 13 is discharged into the underground main liquid return pipeline through the energy conversion valve 2. The specific process is as follows:
the pilot valve 4 is electrically operated: main liquid inlet → the energy exchange valve 2 → the upper cavity of the liquid inlet oil cylinder 7 → the third one-way valve 10 → the electromagnetic pilot valve → the main valve.
The power-off working route of the pilot valve 4 is as follows: high pressure fluid in the main valve → electromagnetic pilot valve → second check valve 11 → upper chamber of return piston 13 → energy exchange valve 2 → main return fluid.
When the pilot valve 4 executes actions for multiple times, at least one piston in the liquid inlet oil cylinder 7 or the liquid return oil cylinder 13 moves to the limit position, and the liquid inlet position sensor 6 or the liquid return position sensor 14 is triggered to act. At this time, the liquid replenishing action is started so as to push the pistons in the liquid inlet cylinder 7 and the liquid return cylinder 13 to the initial positions.
After the position sensor signal is sent to the support controller, the support controller drives one path of valve core of the pilot valve 4 to open and controls the action of the energy exchange valve 2. The high-pressure liquid pushes a piston in the liquid return oil cylinder 13 to move to the initial position through the energy exchange valve 2; the liquid in the upper cavity of the liquid return oil cylinder 13 enters the liquid inlet oil cylinder 7 through the filter 9 and the one-way valve 11, and pushes the piston to move to the initial position. The liquid in the upper cavity of the liquid inlet oil cylinder is discharged into the main liquid return through the energy exchange valve 2.
After time t, the other valve element of the pilot valve 4 is opened at the same time, and the fluid supply valve 5 and the fluid discharge valve 12 are driven to operate. And continuing to replenish the liquid into the system until the liquid inlet piston 7 and the liquid return piston 13 move to the initial positions. This process is also controlled by time. The process is as follows:
liquid supplementing process 1: main liquid inlet → the energy exchange valve 2 → the lower cavity of the liquid return oil cylinder 13 → the second filter 9 → the first one-way valve 8 → the lower cavity of the liquid inlet oil cylinder 7 → the energy exchange valve 2 → main liquid return.
And (3) liquid supplementing process 2: main liquid inlet → the first filter 3 → the liquid supplementing valve 6 → the lower cavity of the liquid inlet oil cylinder 7 → the energy exchanging valve 2 → main liquid return;
liquid supplementing process 3: main liquid inlet → energy exchange valve 2 → lower cavity of liquid return oil cylinder 13 → liquid discharge valve 12.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (3)
1. The utility model provides a novel mining hydraulic support electricity liquid accuse switching-over valve device which characterized in that: the device comprises a pilot valve, an energy exchange valve, a liquid inlet oil cylinder, a liquid return oil cylinder, a liquid supplementing valve, a liquid discharging valve, four one-way valves and two filters; the underground main liquid inlet pipe is communicated with the upper cavity of the liquid inlet oil cylinder through an energy exchange valve, the underground main liquid inlet pipe is communicated with the liquid supplementing valve through a first filter, and the underground main liquid inlet pipe is also communicated with the lower cavity and the main valve of the liquid return oil cylinder; one valve core of the pilot valve is connected with and controls the energy conversion valve, the other valve core of the pilot valve is respectively connected with and controls the liquid supplementing valve and the liquid discharging valve, one pipeline of the pilot valve is communicated with the underground main liquid returning pipe through a fourth one-way valve, the other pipeline of the pilot valve is communicated with the liquid supplementing valve, the other end of the liquid supplementing valve and the lower cavity of the liquid inlet oil cylinder are both communicated with the liquid inlet end of a third one-way valve, the liquid outlet end of the third one-way valve is communicated with a main valve through an electromagnetic pilot valve, and the main valve is connected with and controls the hydraulic support; the main valve is also communicated with the liquid inlet end of a second one-way valve through an electromagnetic pilot valve, the liquid outlet end of the second one-way valve is communicated with a liquid discharge valve, the upper cavity of a liquid return oil cylinder and a second filter, and the other end of the second filter is communicated with the lower cavity of the liquid inlet oil cylinder through a first one-way valve.
2. The novel mining hydraulic support electrohydraulic reversing valve device of claim 1, characterized in that: the liquid inlet oil cylinder and the liquid return oil cylinder are respectively provided with a liquid inlet position sensor and a liquid return position sensor, the liquid inlet position sensor and the liquid return position sensor are both connected with the support controller and transmit the detected liquid level to the support controller, and the support controller controls the two valve cores of the pilot valve to act according to the liquid level.
3. The novel mining hydraulic support electrohydraulic control reversing valve device according to claim 1 or 2, characterized in that: and the first filter and the second filter are both 25 μm filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963829.3U CN215444097U (en) | 2021-08-20 | 2021-08-20 | Novel mining hydraulic support electrohydraulic control reversing valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121963829.3U CN215444097U (en) | 2021-08-20 | 2021-08-20 | Novel mining hydraulic support electrohydraulic control reversing valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215444097U true CN215444097U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121963829.3U Active CN215444097U (en) | 2021-08-20 | 2021-08-20 | Novel mining hydraulic support electrohydraulic control reversing valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215444097U (en) |
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2021
- 2021-08-20 CN CN202121963829.3U patent/CN215444097U/en active Active
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