High pressure filtration system

Abstract

The utility model provides a high-pressure filtering system, and relates to the technical field of coal mine underground filtering stations, the high-pressure filtering system comprises a main controller, at least two filtering modules, a liquid inlet multi-way and a liquid outlet multi-way, each filtering module comprises a pilot control valve, a liquid supply channel and a liquid collection channel, and each filtering module is provided with a first liquid inlet and a first liquid outlet; the first liquid inlet is communicated with the first end of the liquid supply channel, the first liquid outlet is communicated with the first end of the liquid collection channel, and the pilot control valve is electrically connected with the main controller; the second ends of the liquid supply channels of all the filtering modules are communicated with the same liquid inlet multi-way, and the second ends of the liquid collection channels of all the filtering modules are communicated with the same liquid outlet multi-way. According to the system, automatic switching of a system filtering working mode and a backflushing working mode can be achieved, all the filtering modules are connected in parallel for filtering, time-sharing overhauling or working can be achieved so that the requirements of small-flow, medium-flow and large-flow filtering working conditions can be met, meanwhile, ball valves for controlling the hydraulic pipelines to be cut off in the filtering modules are easy to open again, and the underground fully-mechanized mining efficiency is also ensured.

Description

Technical Field

[0001] The present application relates to the technical field of underground filtration stations in coal mines, and in particular to a high-pressure filtration system. Background Art

[0002] The high-pressure filter station is a filtering device used in the fluid supply system of coal mine underground comprehensive mining equipment. In the harsh environment underground, it can intercept, filter and remove pollutants in the hydraulic system to prevent external pollutants such as coal ash and dust from affecting the normal operation of comprehensive mining equipment such as hydraulic supports and scraper conveyors.

[0003] In the related technology, backwash filter stations generally adopt manual control, which is time-consuming and labor-intensive, and has low safety and reliability. At the same time, due to the limitation of underground space layout, the filtration scale of the backwash filter station is limited. In addition, when the pressure in the hydraulic pipeline of the filter module is high, it is difficult to reopen the ball valve used to control the hydraulic pipeline cutoff, so that the filter module is difficult to restart after maintenance, affecting the underground comprehensive mining efficiency. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model proposes a high-pressure filtration system, which can realize automatic switching of system filtering and backwashing working modes, and each filter module is filtered in parallel, so it can be repaired or worked in time to adapt to the requirements of small flow, medium flow and large flow filtering conditions. At the same time, the ball valve that controls the hydraulic pipeline cutoff in the filter module is easy to reopen, which also ensures the efficiency of underground comprehensive mining.

[0006] A high-pressure filtration system according to an embodiment of the utility model includes a main controller, at least two filtration modules, a liquid inlet multi-port and a liquid outlet multi-port.

[0007] Wherein, each of the filter modules comprises a pilot control valve, a liquid supply channel and a liquid collection channel, each of the filter modules has a first liquid inlet and a first liquid outlet, the first liquid inlet is communicated with the first end of the liquid supply channel, the first liquid outlet is communicated with the first end of the liquid collection channel, the pilot control valve is electrically connected to the main controller and is used to control the opening and closing of the first liquid inlet;

[0008] Wherein, the second ends of the liquid supply channels of all the filter modules are connected to the same liquid inlet multi-channel, and the second ends of the liquid collection channels of all the filter modules are connected to the same liquid outlet multi-channel.

[0009] According to the high-pressure filtering system of the embodiment of the utility model, the main controller controls the working state of the pilot control valve to realize the on-off control of the first liquid inlet in the filter module by the pilot control valve, so that the high-pressure filtering system is in the filtering working mode when the first liquid inlet is connected, and the high-pressure filtering system is in the backwashing working mode when the first liquid inlet is cut off. Compared with the related art that requires manual control to switch the working mode of the high-pressure filtering system, in the present application, the automatic switching of the working mode can be realized through the cooperation of the main controller and the pilot control valve, which saves time and effort and has high safety and reliability. At the same time, the design that each filter module is arranged in parallel and controlled by the main controller respectively also enables each filter module to be overhauled or worked in time to adapt to the requirements of small flow, medium flow and large flow filtering conditions, and the filtering scale is highly flexible. In addition, the liquid supply channels of all filter modules are connected to the same liquid inlet multi-channel, and the liquid collection channels are connected to the same liquid outlet multi-channel arrangement, which further improves the integration of the high-pressure filtering system and has good overall structural regularity.

[0010] In some embodiments, the high-pressure filtration system further includes a liquid inlet high-pressure ball valve and a liquid outlet high-pressure ball valve, the liquid inlet high-pressure ball valve is installed in the liquid supply channel, and the liquid outlet high-pressure ball valve is installed in the liquid confluence channel.

[0011] In some embodiments, the high-pressure filtration system further comprises a bypass pilot ball valve, which is connected in parallel beside the liquid inlet high-pressure ball valve, and the opening torque of the bypass pilot ball valve is smaller than the opening torque of the liquid inlet high-pressure ball valve.

[0012] In some embodiments, each of the filtration modules further includes a liquid inlet channel, a liquid outlet channel, at least four filtration units, a sewage discharge channel and a sewage discharge port.

[0013] The end opening of the liquid inlet channel forms the first liquid inlet, and the end opening of the liquid outlet channel forms the first liquid outlet;

[0014] Wherein, the pilot control valve has two working positions, wherein two adjacent filter units are respectively connected to the two working positions of the same pilot control valve, and all the filter units are connected in parallel between the liquid inlet channel and the liquid outlet channel;

[0015] Wherein, the filter unit, the sewage discharge channel and the sewage discharge port are connected in sequence.

[0016] In some embodiments, the filter unit includes a liquid inlet control valve core assembly, a filter element and a sewage discharge control valve core assembly; the liquid inlet channel, the liquid inlet control valve core assembly and the liquid inlet end of the filter element are connected in sequence, the liquid outlet end of the filter element is connected to the liquid outlet channel, the liquid inlet end of the filter element, the sewage discharge control valve core assembly and the sewage discharge channel are connected in sequence, the liquid inlet control valve core assembly and the sewage discharge control valve core assembly are both connected to the pilot control valve, and the pilot control valve can successively control the closing of the liquid inlet control valve core assembly and the opening of the sewage discharge control valve core assembly.

[0017] In some embodiments, the filtration module also includes a pilot filter element, a pilot liquid inlet channel, a one-way valve and a pilot liquid outlet channel. The liquid inlet channel, the pilot filter element, the pilot liquid inlet channel and the liquid inlet end of the pilot control valve are connected in sequence, and the liquid outlet end of the pilot control valve, the pilot liquid outlet channel, the one-way valve and the sewage discharge channel are connected in sequence.

[0018] In some embodiments, the first liquid inlets of all the filter modules are located on the same side of the filter module, the first liquid outlets of all the filter modules are located on the same side of the filter module, and the first liquid inlet and the first liquid outlet are respectively arranged on both sides of the corresponding filter module;

[0019] Alternatively, the first liquid inlet and the first liquid outlet are located on the same side of the corresponding filter module.

[0020] In some embodiments, the liquid inlet multi-way and the liquid outlet multi-way each include at least three openings, the openings of the liquid inlet multi-way are connected to the emulsion source to be filtered, and the openings of the liquid outlet multi-way are connected to the liquid supply system of the underground comprehensive mining equipment.

[0021] In some embodiments, the filtration module further includes a first pressure sensor and a second pressure sensor electrically connected to the main controller, the first pressure sensor is connected to the liquid inlet channel, and the second pressure sensor is connected to the liquid outlet channel.

[0022] In some embodiments, the number of the filter units is an even number, the number of the filter units located on opposite sides of the first pressure sensor along the extension direction of the liquid inlet channel is equal, and the number of the filter units located on opposite sides of the second pressure sensor along the extension direction of the liquid outlet channel is equal.

[0023] In some embodiments, the liquid inlet control valve core assembly is a normally open valve core assembly, the sewage discharge control valve core assembly is a normally closed valve core assembly, the liquid inlet high-pressure ball valve and the liquid outlet high-pressure ball valve are both normally open high-pressure ball valves, and the bypass pilot ball valve is a normally closed ball valve.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a high-pressure filtration system according to an embodiment of the utility model (in the figure, A1, A2, B1 and B2 are all first liquid inlets, A3, A4, B3 and B4 are all first liquid outlets, and WA and WB are both sewage outlets).

[0026] Figure numerals: 1. Main controller, 2. Filter module, 21. Pilot control valve, 211. Pilot filter element, 212. Pilot liquid inlet channel, 213. Check valve, 214. Pilot liquid outlet channel, 22. Liquid supply channel, 23. Liquid collection channel, 24. Liquid inlet channel, 25. Liquid outlet channel, 26. Filter unit, 261. Liquid inlet control valve core assembly, 262. Filter element, 263. Sewage control valve core assembly, 27. Sewage outlet channel, 28. First pressure sensor, 29. Second pressure sensor, 3. Liquid inlet multi-way, 4. Liquid outlet multi-way, 5. Liquid inlet high-pressure ball valve, 6. Liquid outlet high-pressure ball valve, 7. Bypass pilot ball valve. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0028] like Figure 1 As shown, a high-pressure filtration system according to an embodiment of the utility model includes a main controller 1, at least two filtration modules 2, a liquid inlet multi-port 3 and a liquid outlet multi-port 4.

[0029] Among them, each filter module 2 includes a pilot control valve 21, a liquid supply channel 22 and a liquid collection channel 23, each filter module 2 has a first liquid inlet and a first liquid outlet, the first liquid inlet is connected to the first end of the liquid supply channel 22, the first liquid outlet is connected to the first end of the liquid collection channel 23, the pilot control valve 21 is electrically connected to the main controller 1 and is used to control the opening and closing of the first liquid inlet.

[0030] The second ends of the liquid supply channels 22 of all the filter modules 2 are connected to the same liquid inlet multi-channel 3 , and the second ends of the liquid collection channels 23 of all the filter modules 2 are connected to the same liquid outlet multi-channel 4 .

[0031] According to the high-pressure filtering system of the embodiment of the utility model, the main controller 1 controls the working state of the pilot control valve 21 to realize the on-off control of the first liquid inlet in the filter module 2 by the pilot control valve 21, so that when the first liquid inlet is connected, the high-pressure filtering system is in the filtering working mode, and when the first liquid inlet is cut off, the high-pressure filtering system is in the backwashing working mode. Compared with the related art that requires manual control to switch the working mode of the high-pressure filtering system, in the present application, the main controller 1 and the pilot control valve 21 can cooperate to realize the automatic switching of the working mode, which saves time and effort, and has high safety and reliability. At the same time, the design that each filter module 2 is arranged in parallel and controlled by the main controller 1 respectively also enables each filter module 2 to be overhauled or worked in time to adapt to the requirements of small flow, medium flow and large flow filtering conditions, and the filtering scale is highly flexible. In addition, the liquid supply channels 22 of all filter modules 2 are connected to the same liquid inlet multi-way 3, and the liquid collection channels 23 are connected to the same liquid outlet multi-way 4, which further improves the integration of the high-pressure filtering system and has good overall structural regularity.

[0032] Specifically, the pilot control valve 21 may be, but is not limited to, an electromagnetic pilot valve.

[0033] Furthermore, in order to improve the applicability of the high-pressure filtration system in the underground space, the first liquid inlet and the first liquid outlet can both be two opposite to each other along the first direction, so that when in use, according to the actual layout and installation conditions of the high-pressure filtration system, the corresponding first liquid inlet can be selected nearby to be connected with the emulsion source to be filtered through the liquid inlet multi-way 3, and the corresponding first liquid outlet can be connected with the liquid supply system of the underground comprehensive mining equipment through the liquid outlet multi-way 4 to ensure the rationality of the layout of the high-pressure filtration system. When one of the first liquid inlets is connected to the first end of the liquid supply channel 22, the other first liquid inlet can be blocked by a plug, and the two first liquid outlets work in the same way.

[0034] like Figure 1 As shown, in some embodiments, the high-pressure filtration system further includes a liquid inlet high-pressure ball valve 5 and a liquid outlet high-pressure ball valve 6 , the liquid inlet high-pressure ball valve 5 is installed in the liquid supply channel 22 , and the liquid outlet high-pressure ball valve 6 is installed in the liquid converging channel 23 .

[0035] The inlet high-pressure ball valve 5 and the outlet high-pressure ball valve 6 can be used to respectively realize the on-off control of the liquid supply channel 22 and the liquid collection channel 23, so that when the corresponding filter module 2 needs to work, the inlet high-pressure ball valve 5 and the outlet high-pressure ball valve 6 of the filter module 2 are both in the open state. When the corresponding filter module 2 needs to be repaired or the flow rate of the emulsion to be filtered is small and the filter module 2 does not need to work, the outlet high-pressure ball valve 6 and the inlet high-pressure ball valve 5 of the filter module 2 are closed in turn, thereby meeting the use requirements of the high-pressure filtration system.

[0036] like Figure 1As shown, in some embodiments, the high-pressure filtration system further includes a bypass pilot ball valve 7, which is connected in parallel to the side of the liquid inlet high-pressure ball valve 5, and the opening torque of the bypass pilot ball valve 7 is smaller than the opening torque of the liquid inlet high-pressure ball valve 5.

[0037] Through the design of the bypass pilot ball valve 7, when the pressure difference on both sides of the liquid inlet high-pressure ball valve 5 on the liquid supply pipeline is too large and it is difficult to open it manually, the bypass pilot ball valve 7 can be opened first, so that the emulsion on the high-pressure side of the liquid inlet high-pressure ball valve 5 flows into its low-pressure side through the bypass pilot ball valve 7, so as to gradually balance the pressure on both sides of the liquid inlet high-pressure ball valve 5, reduce or eliminate the interference of the pressure difference on the reopening of the liquid inlet high-pressure ball valve 5, and then reduce the opening torque of the liquid inlet high-pressure ball valve 5, so as to facilitate its opening operation.

[0038] Specifically, in order to achieve that the opening torque of the bypass pilot ball valve 7 is smaller than the opening torque of the liquid inlet high-pressure ball valve 5, the flow area of ​​the bypass pilot ball valve 7 can be made much smaller than the flow area of ​​the liquid inlet high-pressure ball valve 5, that is, a small standard ball valve with a small flow area is connected in parallel to the side of the liquid inlet high-pressure ball valve 5, and the flow area of ​​the selected small standard ball valve can be smaller than the flow area of ​​the liquid inlet high-pressure ball valve 5.

[0039] Among them, the small standard ball valve can be a ball valve or a plate-type ball valve with a similar structure to the liquid inlet high-pressure ball valve 5. When a ball valve with a similar structure to the liquid inlet high-pressure ball valve 5 but a small flow area is selected, the ball valve can be connected in parallel to the side of the liquid inlet high-pressure ball valve 5 through an adapter and a guide hole formed in the valve body of the liquid inlet high-pressure ball valve 5 and connected to the flow channels on both sides of the liquid inlet high-pressure ball valve 5; when a plate-type ball valve with a small flow area is selected, the adapter can be omitted, and the oil channel hole of the plate-type ball valve can be directly connected to the aforementioned guide hole, and the plate-type ball valve can be fixed to the valve body of the liquid inlet high-pressure ball valve 5 by a locking bolt.

[0040] It should be noted that the hydraulic pipelines for comprehensive mining in underground coal mines usually use ball stop valves to control the on-and-off of the pipelines. Due to the working environment, the hydraulic pressure in the hydraulic pipelines is very high. When the ball stop valve needs to be opened, since the pressure difference at both ends of the ball stop valve is above 30MPa, it is quite laborious to directly turn the rotating rod of the ball stop valve by hand, and the rotating rod may even be broken, thus affecting the work efficiency. Therefore, in order to solve the problem of difficulty in opening the ball stop valve, the present application adopts a method of first opening a bypass pilot ball valve 7 with a small torque to relieve pressure on both sides of the liquid inlet high-pressure ball valve 5, and then opening the liquid inlet high-pressure ball valve 5 after the pressure is relieved, so as to realize easy and convenient opening of the liquid inlet high-pressure ball valve 5. This method does not require changing the structure of the liquid inlet high-pressure ball valve 5 itself, and has strong replaceability and practicality.

[0041] like Figure 1As shown, in some embodiments, each filter module 2 further includes a liquid inlet channel 24, a liquid outlet channel 25, at least four filter units 26, a sewage discharge channel 27 and a sewage discharge port.

[0042] The end opening of the liquid inlet channel 24 forms a first liquid inlet, and the end opening of the liquid outlet channel 25 forms a first liquid outlet.

[0043] The pilot control valve 21 has two working positions, wherein two adjacent filter units 26 are respectively connected to the two working positions of the same pilot control valve 21 , and all the filter units 26 are connected in parallel between the liquid inlet channel 24 and the liquid outlet channel 25 .

[0044] The filter unit 26, the sewage channel 27 and the sewage outlet are connected in sequence.

[0045] All filter units 26 are connected in parallel between the liquid inlet channel 24 and the liquid outlet channel 25, so that each filter unit 26 can filter independently, so that when one of the filter units 26 cannot filter, there are still other filter units 26 to ensure the filtering work of the filter module 2, and when the filter module 2 is backwashed, the filter units 26 can backwash in turn. At the same time, the two adjacent filter units 26 are controlled by the same pilot control valve 21, which can not only ensure the normal operation of the filter unit 26, but also reduce the number of parts of the entire high-pressure filtration system to a certain extent, and simplify the structure of the high-pressure filtration system.

[0046] Specifically, in order to reduce the number of pipelines and the difficulty of pipeline laying, and at the same time meet the use requirements of limited space underground, the sewage pipes of all filter units 26 can be connected to the same sewage channel 27, and a sewage outlet is formed on the sewage channel 27. The sewage outlet discharges the pollutants after backwashing of the filter unit 26 directly to the outside of the high-pressure system or connects to external centralized pollution removal treatment equipment to treat the pollutants. It will not be expanded or extended here.

[0047] In addition, the first direction is the extension direction of the liquid inlet channel 24 or the liquid outlet channel 25 .

[0048] like Figure 1 As shown, in some embodiments, the filter unit 26 includes a liquid inlet control valve core assembly 261, a filter element 262 and a sewage discharge control valve core assembly 263, the liquid inlet channel 24, the liquid inlet control valve core assembly 261 and the liquid inlet end of the filter element 262 are connected in sequence, the liquid outlet end of the filter element 262 is connected to the liquid outlet channel 25, the liquid inlet end of the filter element 262, the sewage discharge control valve core assembly 263 and the sewage discharge channel 27 are connected in sequence, the liquid inlet control valve core assembly 261 and the sewage discharge control valve core assembly 263 are both connected to the pilot control valve 21, and the pilot control valve 21 can control the liquid inlet control valve core assembly 261 to close and the sewage discharge control valve core assembly 263 to open in sequence.

[0049] The pilot control valve 21 first controls the closing of the liquid inlet valve core assembly and then controls the opening of the sewage control valve core assembly 263. Compared with the filter module 2 in the related technology in which the backwash check valve 213 is first opened and the liquid inlet stop valve is then closed, the filter module 2 in the present application can effectively avoid the emulsion flowing in through the liquid inlet control valve core assembly 261 from being directly discharged by the sewage control valve core assembly 263, causing the waste of emulsion.

[0050] Specifically, the two working positions of the pilot control valve 21 correspond to a control end of the pilot control valve 21 respectively, and the liquid inlet control valve core assembly 261 and the sewage discharge control valve core assembly 263 are both connected to the same control end of the pilot control valve 21, and the control pressure for controlling the liquid inlet control valve core assembly 261 and the sewage discharge control valve core assembly 263 is provided by the same pilot liquid of the pilot control valve 21, and the control pressure required to close the liquid inlet control valve core assembly 261 is less than the control pressure required to open the sewage discharge control valve core assembly 263, so that when the filter module 2 is switched to the backwash mode, the closing of the liquid inlet control valve core assembly 261 can precede the opening of the sewage discharge control valve core assembly 263.

[0051] It should be noted that the specific structure and working principle of the sewage control valve core assembly 263 can adopt the existing technology in the field, and the liquid inlet control valve core assembly 261 can make its on-off control pressure smaller than the on-off control pressure of the sewage control valve core assembly 263 through corresponding structural design or selection, so that when the pilot liquid of the pilot control valve 21 controls the on-off of the two, the liquid inlet control valve core assembly 261 is closed first and the sewage control valve core assembly 263 is opened later, so it will not be expanded here.

[0052] like Figure 1 As shown, in some embodiments, the filter module 2 also includes a pilot filter element 211, a pilot liquid inlet channel 212, a one-way valve 213 and a pilot liquid outlet channel 214, the liquid inlet channel 24, the pilot filter element 211, the pilot liquid inlet channel 212 and the liquid inlet end of the pilot control valve 21 are connected in sequence, and the liquid outlet end of the pilot control valve 21, the pilot liquid outlet channel 214, the one-way valve 213 and the sewage channel 27 are connected in sequence.

[0053] The liquid inlet end of the pilot control valve 21 is connected to the liquid inlet channel 24 through the pilot liquid inlet channel 212 and the pilot filter element 211, so that the emulsion to be filtered in the liquid inlet channel 24 provides pilot liquid for the pilot control valve 21. At the same time, the pilot filter element 211 can filter the emulsion to ensure the cleanliness of the emulsion supplied to the pilot control valve 21. The liquid outlet end of the pilot control valve 21, with the assistance of the one-way valve 213, discharges the pilot liquid after the control effect from the drain channel 27, thereby realizing the smooth working process of the entire pilot control valve 21.

[0054] like Figure 1As shown, in some embodiments, the first liquid inlets of all filter modules 2 are located on the same side of the filter module 2, the first liquid outlets of all filter modules 2 are located on the same side of the filter module 2, and the first liquid inlet and the first liquid outlet are respectively arranged on both sides of the corresponding filter module 2.

[0055] Alternatively, the first liquid inlet and the first liquid outlet are located on the same side of the corresponding filter module 2 .

[0056] In order to avoid layout interference between pipelines and improve the regularity of pipeline layout, it is preferred that the first liquid inlet and the first liquid outlet are respectively arranged on both sides of the corresponding filter module 2.

[0057] Specifically, the liquid inlet channel 24 and the liquid outlet channel 25 each have a first end and a second end opposite to each other along a first direction, the first end of the liquid inlet channel 24 forms a first liquid inlet and the first end of the liquid outlet channel 25 forms a first liquid outlet; or the second end of the liquid inlet channel 24 forms the first liquid inlet and the second end of the liquid outlet channel 25 forms the first liquid outlet; or the first end or the second end of the liquid inlet channel 24 forms the first liquid inlet, and the second end or the first end of the liquid outlet channel 25 forms the first liquid outlet.

[0058] like Figure 1 As shown, in some embodiments, the liquid inlet multi-way 3 and the liquid outlet multi-way 4 each include at least three openings, the openings of the liquid inlet multi-way 3 are connected to the emulsion source to be filtered, and the openings of the liquid outlet multi-way 4 are connected to the liquid supply system of the underground comprehensive mining equipment.

[0059] The liquid inlet multi-port 3 and the liquid outlet multi-port 4 are designed to include at least three openings, so that according to the spatial position of the emulsion source to be filtered and the liquid supply system of the comprehensive mining equipment, the opening that is closest to or more convenient to the liquid inlet multi-port 3 or the liquid outlet multi-port 4 can be selected for connection, which effectively improves the flexibility and rationality of the integrated high-pressure filtration station in connecting with the emulsion source to be filtered and the liquid supply system of the comprehensive mining equipment underground. In addition, the number of devices that can be connected to the liquid inlet multi-port 3 and the liquid outlet multi-port 4 is also expanded.

[0060] like Figure 1 As shown, in some embodiments, the filter module 2 also includes a first pressure sensor 28 and a second pressure sensor 29 electrically connected to the main controller 1, the first pressure sensor 28 is connected to the liquid inlet channel 24, and the second pressure sensor 29 is connected to the liquid outlet channel 25.

[0061] The pressure conditions of the emulsion in the liquid inlet channel 24 and the liquid outlet channel 25 can be monitored respectively by the first pressure sensor 28 and the second pressure sensor 29, wherein the difference between the two is the pressure difference established by the blockage of the filter screen at the liquid inlet end of the filter element 262, which basically reflects the degree of filter screen blockage. When the difference between the two reaches the set value, the liquid inlet high-pressure ball valve 5 on the filter module 2 can be closed, and the pilot control valve 21 controls the closing of the liquid inlet control valve core assembly 261 and the opening of the sewage control valve core assembly 263 in turn, so that the filter module 2 enters the backwash mode to clean the filter element 262, thereby ensuring the filtering effect of the entire high-pressure filtration system.

[0062] Specifically, a pressure gauge may also be connected to the liquid inlet channel 24 .

[0063] like Figure 1 As shown, in some embodiments, the number of filter units 26 is an even number, the number of filter units 26 located on opposite sides of the first pressure sensor 28 along the extension direction of the liquid inlet channel 24 is equal, and the number of filter units 26 located on opposite sides of the second pressure sensor 29 along the extension direction of the liquid outlet channel 25 is equal.

[0064] like Figure 1 As shown, in some embodiments, the liquid inlet control valve core assembly 261 is a normally open valve core assembly, the sewage control valve core assembly 263 is a normally closed valve core assembly, the liquid inlet high-pressure ball valve 5 and the liquid outlet high-pressure ball valve 6 are both normally open high-pressure ball valves, and the bypass pilot ball valve 7 is a normally closed ball valve.

[0065] Now, combined with the specific structure of the high-pressure filtration system, its various working modes are described, specifically:

[0066] Filtration mode: Taking a filtration unit 26 as an example, the emulsion to be filtered from the emulsion source to be filtered (i.e., the pump station) flows into the filtration module 2 through the liquid inlet multi-way 3, the liquid supply channel 22, the liquid inlet high-pressure ball valve 5 and the first liquid inlet in sequence, and the emulsion to be filtered flows into the liquid inlet control valve core assembly 261 through the liquid inlet channel 24 to reach the filter element 262. The emulsion filtered by the filter element 262 flows out of the filtration module 2 from the first liquid outlet through the liquid outlet channel 25, and then flows through the liquid outlet high-pressure ball valve 6 to the liquid outlet multi-way 4, and flows out of the high-pressure filtration system to the liquid supply system of the comprehensive mining equipment on the working face;

[0067] Backflush mode: taking a filter unit 26 as an example, the main controller 1 outputs a signal to the pilot control valve 21, and a working position of the pilot control valve 21 is actuated to output the pilot liquid to the liquid inlet control valve core assembly 261 and the sewage control valve core assembly 263. There are different control pressures between the two. The control pressure of the liquid inlet control valve core assembly 261 is less than that of the sewage control valve core assembly 263, so that the liquid inlet control valve core assembly 261 is closed before the sewage control valve core assembly 263 is opened. At this time, the filter unit 26 enters the backflush mode, and the liquid inlet end of the filter element 262 in the filter unit 26 is connected. The pressure of the sewage outlet of the filter module 2 where the filter unit 26 is located is much lower than the system pressure. The emulsion in the liquid outlet channel 25 flows in the reverse direction to the liquid inlet end through the liquid outlet end of the filter element 262, driving the pollutants attached to the filter screen layer at the liquid inlet end of the filter element 262 to flow to the sewage control valve core assembly 263, and discharged to the sewage outlet through the sewage outlet channel 27.

[0068] Among them, the recoil mode includes differential pressure recoil, timed recoil and point-controlled recoil, as follows:

[0069] 1. Pressure differential backwash. The first pressure sensor 28 and the second pressure sensor 29 continuously output pressure value signals to the main controller 1. The difference between the two is the pressure difference established by the filter blockage, which basically reflects the degree of filter blockage. When the difference between the two reaches the set value, the main controller 1 enters the backwash mode of the filter module 2 and outputs signals to backwash each group of filter elements 262 of the filter module 2 in turn.

[0070] 2. Timed recoil: set the frequency of periodic recoil, and when one cycle is up, enter the high-pressure filter system recoil mode, and output signals in sequence to recoil each group of filter elements 262 of the high-pressure filter system.

[0071] 3. Point-controlled backwashing: point-controlled backwashing means automatically entering the backwashing mode of the selected filter module 2 through the control panel of the main controller 1, and outputting signals to backwash each group of filter elements 262 of the selected filter module 2 in turn.

[0072] In addition, in the high-pressure filtration system, the liquid supply and return method of the pilot control valve 21 is to lead out the emulsion to be filtered in the liquid inlet channel 24, filter it through the pilot filter element 211, and then supply it to the liquid inlet end of the pilot control valve 21 through the pilot liquid inlet channel 212, so as to provide the pilot control valve 21 with pilot liquid for controlling the opening and closing of the liquid inlet control valve core assembly 261 and the sewage control valve core assembly 263. After the pilot control valve 21 completes the pilot control function, the pilot liquid is discharged from the liquid outlet end of the pilot control valve 21 through the pilot liquid outlet channel 214, the one-way valve 213 and the sewage channel 27 in sequence.

[0073] Maintenance mode of the filter module 2: The liquid supply channel 22 is installed with a liquid inlet high-pressure ball valve 5 and a bypass pilot ball valve 7. The bypass pilot ball valve 7 is responsible for balancing the pressure difference on both sides of the liquid inlet high-pressure ball valve 5. The liquid inlet high-pressure ball valve 5 is responsible for the main flow of the liquid supply channel 22. When there is a pressure difference on both sides of the liquid inlet high-pressure ball valve 5 (the operating pressure difference can reach 30MPa), the liquid inlet high-pressure ball valve 5 is subjected to a unilateral axial force, resulting in an excessive opening torque, resulting in poor opening or failure to open, while the bypass pilot ball valve 7 can be opened at the inlet. The liquid high-pressure ball valve 5 is opened before it is opened to allow the emulsion on the high-pressure side to flow into the low-pressure side, gradually balancing the pressure on both sides, reducing or eliminating the unilateral axial force borne by the liquid inlet high-pressure ball valve 5, and thereby reducing the opening torque. During maintenance, the liquid outlet high-pressure ball valve 6 and the liquid inlet high-pressure ball valve 5 are closed in turn. After the maintenance is completed, the bypass pilot ball valve 7 is opened to restore the pressure gauge of the filter module 2 to the system pressure (or above 25MPa), then the bypass pilot ball valve 7 is closed, and the liquid inlet high-pressure ball valve 5 and the liquid outlet high-pressure ball valve 6 are opened in turn.

[0074] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high pressure filtration system, characterized in that: include: Main controller; At least two filter modules, each of which includes a pilot control valve, a liquid supply channel and a liquid collection channel, each of which has a first liquid inlet and a first liquid outlet, the first liquid inlet is connected to the first end of the liquid supply channel, the first liquid outlet is connected to the first end of the liquid collection channel, the pilot control valve is electrically connected to the main controller and is used to control the opening and closing of the first liquid inlet; as well as The second ends of the liquid supply channels of all the filter modules are connected to the same liquid inlet multi-channel and the second ends of the liquid collection channels of all the filter modules are connected to the same liquid outlet multi-channel.

2. The high pressure filtration system according to claim 1, characterized in that: The high-pressure filtration system further comprises a liquid inlet high-pressure ball valve and a liquid outlet high-pressure ball valve, wherein the liquid inlet high-pressure ball valve is installed in the liquid supply channel, and the liquid outlet high-pressure ball valve is installed in the liquid converging channel.

3. The high pressure filtration system according to claim 2, characterized in that: The high-pressure filtration system further comprises a bypass pilot ball valve, which is connected in parallel beside the liquid inlet high-pressure ball valve, and the opening torque of the bypass pilot ball valve is smaller than the opening torque of the liquid inlet high-pressure ball valve.

4. The high pressure filtration system according to claim 1, characterized in that: Each of the filtering modules further comprises: a liquid inlet channel and a liquid outlet channel, wherein the end opening of the liquid inlet channel forms the first liquid inlet, and the end opening of the liquid outlet channel forms the first liquid outlet; At least four filter units, the pilot control valve has two working positions, wherein two adjacent filter units are respectively connected to the two working positions of the same pilot control valve, and all the filter units are connected in parallel between the liquid inlet channel and the liquid outlet channel; and A sewage discharge channel and a sewage discharge port, wherein the filter unit, the sewage discharge channel and the sewage discharge port are connected in sequence.

5. The high pressure filtration system according to claim 4, characterized in that: The filter unit includes a liquid inlet control valve core assembly, a filter element and a sewage discharge control valve core assembly. The liquid inlet channel, the liquid inlet control valve core assembly and the liquid inlet end of the filter element are connected in sequence, the liquid outlet end of the filter element is connected to the liquid outlet channel, the liquid inlet end of the filter element, the sewage discharge control valve core assembly and the sewage discharge channel are connected in sequence, the liquid inlet control valve core assembly and the sewage discharge control valve core assembly are both connected to the pilot control valve, and the pilot control valve can successively control the closing of the liquid inlet control valve core assembly and the opening of the sewage discharge control valve core assembly.

6. The high pressure filtration system according to claim 4 or 5, characterized in that: The filtration module also includes a pilot filter element, a pilot liquid inlet channel, a one-way valve and a pilot liquid outlet channel. The liquid inlet channel, the pilot filter element, the pilot liquid inlet channel and the liquid inlet end of the pilot control valve are connected in sequence, and the liquid outlet end of the pilot control valve, the pilot liquid outlet channel, the one-way valve and the sewage discharge channel are connected in sequence.

7. The high pressure filtration system according to claim 1, characterized in that: The first liquid inlets of all the filter modules are located on the same side of the filter module, the first liquid outlets of all the filter modules are located on the same side of the filter module, and the first liquid inlet and the first liquid outlet are respectively arranged on both sides of the corresponding filter module; Alternatively, the first liquid inlet and the first liquid outlet are located on the same side of the corresponding filter module.

8. The high pressure filtration system according to claim 1, characterized in that: The liquid inlet multi-way and the liquid outlet multi-way both include at least three openings. The openings of the liquid inlet multi-way are connected to the emulsion source to be filtered, and the openings of the liquid outlet multi-way are connected to the liquid supply system of the underground comprehensive mining equipment.

9. The high pressure filtration system according to claim 4, characterized in that: The filter module further includes a first pressure sensor and a second pressure sensor electrically connected to the main controller, wherein the first pressure sensor is connected to the liquid inlet channel, and the second pressure sensor is connected to the liquid outlet channel.

10. The high pressure filtration system according to claim 9, characterized in that: The number of the filter units is an even number, and the number of the filter units located on opposite sides of the first pressure sensor along the extension direction of the liquid inlet channel is equal, and the number of the filter units located on opposite sides of the second pressure sensor along the extension direction of the liquid outlet channel is equal.

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