Electric backwashing filter for hydraulic support

Abstract

The utility model discloses an electric backwashing filter for a hydraulic support, which relates to the technical field of backwashing filters and comprises a valve body, a valve string, a filter element and an electromagnetic pilot valve are mounted in the valve body in a matching manner, the electromagnetic pilot valve is used for controlling the action of the valve string, and a liquid injection port, a liquid discharge port and an impurity discharge port are arranged on the valve body in a matching manner. A pressure sensor is installed on the valve body in a matched mode and electrically connected with a controller of the hydraulic support. According to the electric backwashing filter for the hydraulic support, through cooperative arrangement of the support controller, the main and auxiliary electromagnetic valves, the valve string and the pressure sensor, the pressure difference of the two sides of the filter element can be monitored in the first time, backwashing filtering can be automatically carried out in time, the service life of the filter element is prolonged, and it is guaranteed that the filtering capacity of the filter element is within the normal range all the time; the actual use condition of the filter element is mastered to remind personnel to replace the filter element in time, so that the system stability is ensured, and the coal mining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of backwashing filters, in particular to an electric backwashing filter for a hydraulic support. Background Art

[0002] Backwash filter is a precision equipment that uses filter to directly intercept impurities in water, remove suspended solids and particulate matter in water, reduce turbidity, purify water quality, reduce system dirt, bacteria, algae, rust, etc., to protect the normal operation of equipment. The comprehensive mechanized coal mining work in underground coal mines faces increasing requirements on the performance and working reliability of comprehensive mechanized coal mining equipment in coal seams. The pressure fluid of hydraulic systems such as hydraulic supports in underground coal mining working faces in coal mines needs to be pre-filtered to prevent dirt and impurities from entering the hydraulic systems such as supports, thereby further improving the service life of various hydraulic equipment.

[0003] A backwash filter is disclosed in Chinese utility model patent application No.: CN201920392629.3, and its structure includes: a connecting pipe, which is arranged in a pipeline to transport water in the pipeline; a filter, which is connected to the connecting pipe and is used to filter the water transported by the connecting pipe, and a switching pipe is provided in the filter, and the switching between filtering and cleaning in the filter is completed by adjusting the direction of the switching pipe; however, the backwash filter needs to manually adjust the direction of the switching pipe to perform backwashing, and when the staff performs backwashing, they cannot grasp the actual situation of the filter element, which easily causes the timing of flushing to be advanced or delayed, thereby affecting the service life of the filter element.

[0004] Therefore, it is necessary to propose an electric backwash filter for a hydraulic support to solve the above problems. Utility Model Content

[0005] Technical problem to be solved: The purpose of the utility model is to provide an electric backwash filter for a hydraulic support to solve the problem that the existing backwash filter proposed in the above background technology requires manual adjustment to backwash, and when the staff performs backwashing, they cannot grasp the actual situation of the filter element, which easily leads to the timing of flushing being advanced or delayed, thereby affecting the service life of the filter element.

[0006] Technical solution: To achieve the above purpose, the utility model is implemented through the following technical solution: an electric backwash filter for a hydraulic support, including a valve body, a valve string, a filter element and an electromagnetic pilot valve are matched and installed in the valve body, the electromagnetic pilot valve is used to control the action of the valve string, and the valve body is matched and provided with a liquid injection port, a liquid discharge port and a debris discharge port. A pressure sensor is matched and installed on the valve body, and the pressure sensor is electrically connected to the controller of the hydraulic support. The pressure sensor is connected to two pressure probes, which are respectively installed at the liquid inlet and the liquid outlet on both sides of the filter element for detecting the pressure of the liquid inlet and the liquid outlet on both sides of the filter element. The electromagnetic pilot valve is controlled and connected to the hydraulic support controller, and the hydraulic support controller controls the opening and closing of the electromagnetic pilot valve according to the pressure difference between the liquid inlet and the liquid outlet of the filter element.

[0007] Preferably, there are multiple valve strings and filter elements, and two probes of the pressure sensor are respectively installed at the liquid inlet and the liquid outlet on both sides of any filter element.

[0008] Preferably, the number of the valve strings and filter elements is the same, and two are provided, namely the first valve string, the second valve string, the first filter element and the second filter element, and the electromagnetic pilot valve includes the first electromagnetic pilot valve and the second electromagnetic pilot valve; the valve body is matched with a main channel, a secondary channel and a recoil channel, one end of the main channel is connected to the injection port, and the other end is connected to the liquid inlet of the first filter element through the first electromagnetic pilot valve, and the liquid outlet of the first filter element is connected to the discharge port through the first valve string.

[0009] Preferably, the main channel between the first solenoid pilot valve and the injection port is connected to one end of the secondary channel, the other end of the secondary channel is connected to the liquid inlet of the second filter element through the second solenoid pilot valve, and the liquid outlet of the second filter element is connected to the discharge port through the first valve string and the second valve string.

[0010] Preferably, the solenoid pilot valve is a normally open two-position three-way solenoid valve, the inlet A of the first solenoid pilot valve and the second solenoid pilot valve are respectively connected to the liquid inlet of the corresponding filter element, the outlet B of the first solenoid pilot valve and the second solenoid pilot valve are respectively connected to the main channel and the secondary channel, the reversing port C of the first solenoid pilot valve and the second solenoid pilot valve are respectively connected to the recoil channel and the impurity discharge port, a filter is provided in the recoil channel, and the liquid outlet of the filter is connected to the liquid discharge port through the second valve string.

[0011] Preferably, a drainage channel is provided in the valve body, the reversing ports C of the first solenoid pilot valve and the second solenoid pilot valve are connected to the drainage channel, one end of the drainage channel is connected to the drainage port, and the other end of the drainage channel is connected to an end of the recoil channel away from the discharge port.

[0012] Beneficial effect: Compared with the prior art, the utility model provides an electric backwash filter for a hydraulic support, which has a unique structure and is easy to use. Through the coordinated arrangement of the support controller, electromagnetic pilot valve, valve string, filter element and pressure sensor, when there are more impurities in the filter element, the pressure sensor collects the pressure on both sides of the filter element and converts it into a pressure difference. When the pressure difference reaches a preset threshold value of the pressure sensor, the pressure sensor feeds back a signal to the support controller, and the support controller controls the first electromagnetic pilot valve to close. At the same time, the support controller controls the two valve strings to act, so that the liquid flows from the injection port into the secondary channel and passes through the second filter element after being filtered, and then flows back from the liquid outlet of the first filter element to the liquid inlet of the first filter element, so as to backwash the first filter element. The liquid with impurities flows into the impurity discharge channel from the reversing port of the first electromagnetic pilot valve, wherein part of the liquid with impurities is discharged from the discharge port through the filter and the first valve string respectively, and the other part of the liquid with impurities flows out through the impurity discharge port, and then, the second filter element is backflushed in the same way, and during backflushing, the liquid will continue to be discharged from the discharge port; in this way, the pressure difference on both sides of the filter element can be monitored in the first time and backflushing and filtering can be performed automatically in time, thereby extending the service life of the filter element, ensuring that the filtering capacity of the filter element is always within the normal range, mastering the actual use of the filter element, and reminding personnel to replace the filter element in time, thereby ensuring the stability of the system and improving the coal mining efficiency. In addition, since the liquid will continue to be discharged from the discharge port during backflushing, shutdown can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional front view schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a three-dimensional side view schematic diagram of the structure of the utility model;

[0015] Figure 3 It is a left side schematic diagram of the structure of the utility model;

[0016] Figure 4 It is a front view schematic diagram of the structure of the utility model;

[0017] Figure 5 It is a cross-sectional schematic diagram of the structure of the utility model;

[0018] Figure 6 It is a schematic diagram of the functional symbol connection of the structure of the utility model.

[0019] In the figure: 1. Solenoid pilot valve; 2. Valve string; 3. Filter element; 4. Pressure sensor; 5. Liquid filling port; 6. Liquid discharge port; 7. Impurity discharge port; 8. Filter. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Embodiment 1: This embodiment 1 provides an electric backwash filter for a hydraulic support, which is directly improved on the existing backwash filter and has a unique structure. Please refer to Figure 1-6 As shown, it includes a valve body, which is an existing electric backwash filter. A valve string 2, a filter element 3 and an electromagnetic pilot valve 1 are matched and installed in the valve body. The electromagnetic pilot valve 1 is used to control the action of the valve string 2, and the valve body is matched with a liquid injection port 5, a liquid discharge port 6, and a debris discharge port 7. A pressure sensor 4 is matched and installed on the valve body. The pressure sensor 4 is electrically connected to the controller of the hydraulic support. The pressure sensor 4 is connected to two pressure probes, which are respectively installed at the liquid inlet and the liquid outlet on both sides of the filter element 3 to detect the pressure of the liquid inlet and the liquid outlet on both sides of the filter element 3. The electromagnetic pilot valve 1 is controlled and connected with the hydraulic support controller. The hydraulic support controller controls the opening and closing of the electromagnetic pilot valve 1 according to the pressure difference between the liquid inlet and the liquid outlet of the filter element 3 to backwash the filter element 3.

[0022] There are multiple valve strings 2 and filter elements 3, and the two probes of the pressure sensor 4 are respectively installed at the liquid inlet and the liquid outlet on both sides of any filter element 3; the number of valve strings 2 and filter elements 3 is the same, and there are two of them, namely the first valve string 2, the second valve string 2, the first filter element 3 and the second filter element 3, and the electromagnetic pilot valve 1 includes the first electromagnetic pilot valve and the second electromagnetic pilot valve; there are multiple installation methods for the filter element 3 and the valve string 2, for example: the upper part of the valve body is symmetrically provided with two recoil chambers, and the two valve strings 2 are respectively matched and installed in the two recoil chambers, and the lower part of the valve body is symmetrically provided with two filter chambers, and the two filter elements 3 are respectively matched and installed Installed in two filter chambers, the liquid injection port 5, the liquid discharge port 6 and the impurity discharge port 7 are all located on one side of the valve body; the valve body is matched with a main channel, a secondary channel and a recoil channel, one end of the main channel is connected with the liquid injection port 5, and the other end is connected with the liquid inlet of the first filter element 3 through the first electromagnetic pilot valve, and the liquid outlet of the first filter element 3 is connected with the liquid discharge port 6 through the first valve string 2; the main channel between the first electromagnetic pilot valve and the liquid injection port 5 is connected with one end of the secondary channel, and the other end of the secondary channel is connected with the liquid inlet of the second filter element 3 through the second electromagnetic pilot valve, and the liquid outlet of the second filter element 3 is connected with the liquid discharge port 6 through the first valve string 2 and the second valve string 2.

[0023] The electromagnetic pilot valve 1 is a normally open two-position three-way electromagnetic valve 1. The inlet A of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the liquid inlet of the corresponding filter element 3, and the outlet B of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the main channel and the secondary channel. The reversing port C of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the recoil channel and the impurity discharge port 7. A filter 8 is provided in the recoil channel, and the liquid outlet of the filter 8 is connected to the liquid discharge port 6 through the second valve string 2; an impurity discharge channel is provided in the valve body, and the reversing port C of the first electromagnetic pilot valve and the second electromagnetic pilot valve is connected to the impurity discharge channel, one end of the impurity discharge channel is connected to the impurity discharge port 7, and the other end of the impurity discharge channel is connected to an end of the recoil channel away from the liquid discharge port 6.

[0024] When we use the backwash filter, the pressure sensor 4 collects the pressure on both sides of the filter element 3 and converts it into a pressure difference. When the pressure difference reaches the preset threshold of the pressure sensor 4, the pressure sensor 4 feeds back the signal to the bracket controller, and the bracket controller controls the first electromagnetic pilot valve to close. At the same time, the bracket controller controls the two valve strings 2 to operate, so that the liquid flows into the secondary channel from the injection port 5 and is filtered by the second filter element 3, and then flows back from the liquid outlet of the first filter element 3 to the liquid inlet of the first filter element 3, and the first filter element 3 is backwashed. The liquid with impurities flows into the impurity discharge channel from the reversing port of the first electromagnetic pilot valve, and part of the liquid with impurities is discharged from the discharge port 6 through the filter 8 and the first valve string 2 respectively, and the other part of the liquid with impurities flows out through the impurity discharge port 7. Then, the second filter element 3 is backwashed in the same way, and during backwashing, the liquid will continue to be discharged from the discharge port 6.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric backwash filter for a hydraulic support, comprising a valve body, a valve string (2), a filter element (3) and an electromagnetic pilot valve (1) are matched and installed in the valve body, the electromagnetic pilot valve (1) is used to control the action of the valve string (2), and the valve body is matched with a liquid injection port (5), a liquid discharge port (6) and a debris discharge port (7), characterized in that: A pressure sensor (4) is mounted on the valve body, and the pressure sensor (4) is electrically connected to a controller of the hydraulic support. The pressure sensor (4) is connected to two pressure probes, and the two pressure probes are mounted at the liquid inlet and the liquid outlet on both sides of the filter element (3) respectively, and are used to detect the pressure of the liquid inlet and the liquid outlet on both sides of the filter element (3). The electromagnetic pilot valve (1) is connected to the hydraulic support controller, and the hydraulic support controller controls the opening and closing of the electromagnetic pilot valve (1) according to the pressure difference between the liquid inlet and the liquid outlet of the filter element (3).

2. The electric backwash filter (8) for a hydraulic support according to claim 1, characterized in that: There are a plurality of valve trains (2) and filter elements (3), and two probes of the pressure sensor (4) are respectively mounted on the liquid inlet and the liquid outlet on both sides of any filter element (3).

3. The electric backwash filter (8) for a hydraulic support according to claim 2, characterized in that: The valve series (2) and the filter elements (3) are of the same number, and are each provided with two, namely, a first valve series, a second valve series, a first filter element, and a second filter element. The electromagnetic pilot valve (1) comprises a first electromagnetic pilot valve and a second electromagnetic pilot valve. A main channel, a secondary channel, and a backwash channel are matchedly provided in the valve body. One end of the main channel is connected to the injection port (5), and the other end is connected to the liquid inlet of the first filter element via the first electromagnetic pilot valve. The liquid outlet of the first filter element is connected to the liquid discharge port (6) via the first valve series.

4. The electric backwash filter (8) for a hydraulic support according to claim 3, characterized in that: The main channel between the first electromagnetic pilot valve and the liquid injection port (5) is connected to one end of the secondary channel, the other end of the secondary channel is connected to the liquid inlet of the second filter element via the second electromagnetic pilot valve, and the liquid outlet of the second filter element is connected to the liquid discharge port (6) via the first valve series and the second valve series.

5. The electric backwash filter (8) for a hydraulic support according to claim 4, characterized in that: The electromagnetic pilot valve (1) is a normally open two-position three-way electromagnetic valve. The inlet A of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the liquid inlet of the corresponding filter element (3). The outlet B of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the main channel and the secondary channel. The reversing port C of the first electromagnetic pilot valve and the second electromagnetic pilot valve are respectively connected to the recoil channel and the impurity discharge port (7). A filter (8) is provided in the recoil channel. The liquid outlet of the filter (8) is connected to the liquid discharge port (6) through the second valve string.

6. The electric backwash filter (8) for a hydraulic support according to claim 5, characterized in that: The valve body is provided with an impurity discharge channel, the reversing ports C of the first electromagnetic pilot valve and the second electromagnetic pilot valve are in communication with the impurity discharge channel, one end of the impurity discharge channel is in communication with the impurity discharge port (7), and the other end of the impurity discharge channel is in communication with an end of the recoil channel away from the liquid discharge port (6).

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