Backwash high-pressure filter station

Abstract

The utility model relates to the technical field of filters, and provides a backwashing high-pressure filter station which comprises a frame and at least one backwashing module arranged in the frame, the backwashing module comprises a valve body, a pilot valve group and a pressure measuring assembly; a liquid inlet hole and a liquid outlet hole are formed in the valve body, two filtering channels which are communicated with the liquid inlet hole and the liquid outlet hole and are connected in parallel are arranged in the valve body, and a liquid inlet control valve core and a filtering assembly are arranged on each filtering channel; the pilot valve set is installed on the valve body and provided with an electromagnetic pilot valve, and a liquid outlet of the electromagnetic pilot valve is communicated with a first control port of the liquid inlet control valve element. The pressure measuring assembly is installed on the valve body and electrically connected with the second control port of the electromagnetic pilot operated valve. According to the utility model, the problems of low intelligent degree, difficulty in disassembly, assembly and maintenance and unreasonable structure in the conventional backwashing high-pressure filter station can be solved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a backwashing high-pressure filter station that can automatically perform backwashing. Background Technology

[0002] High-pressure backwashing filter stations are used in the hydraulic support fluid supply system of underground coal mines. Their function is to clean the media, specifically designed to ensure the long-term reliable operation of the hydraulic system. Installed at the pump station outlet, the high-pressure filter station serves as the first stage of filtration at the pump station outlet. It filters contaminants from the media before it enters the working system, including metal shavings, damaged seal particles, paint, abrasive particles, gravel, and coal slag. This protects the hydraulic components of equipment such as hydraulic supports and scraper conveyors. Emulsions are among the fluids it filters. Backwashing filter stations must develop towards high pressure, high flow rate, modularity, high filtration accuracy, and ease of maintenance to meet the needs of high production and high efficiency.

[0003] However, existing backwashing filter stations still have the following problems:

[0004] 1. Backwashing filter stations are generally manually controlled, requiring manual operation of the backwashing filter handle to operate the inlet shut-off valve and the backwashing valve for backwashing.

[0005] 2. In the backwashing filter station, each control valve core and filter cartridge is installed on the main body and is distributed vertically. They interfere with each other when disassembling and assembling. Before disassembling the valve core, the filter cartridge must be removed first, or the control valve core must be removed before disassembling or replacing the filter cartridge. Repairing the control valve or replacing the filter cartridge is difficult.

[0006] 3. The control valve core assembly used in the backwashing filter station is a bulk valve core, which means that multiple bulk valve core parts are installed into the valve body in sequence. Installation and removal are difficult and time-consuming, and it is easy to damage the valve core parts, especially the seals.

[0007] 4. The entire backwashing filter station is relatively large in size, occupies a lot of space, and the valve body, filter cartridges and other components and pipelines are loosely arranged, with an unreasonable structure, making hoisting and transportation difficult. Utility Model Content

[0008] The purpose of this invention is to provide a backwashing high-pressure filter station that solves the problems of low level of intelligence, difficult disassembly and maintenance, and unreasonable structure in the existing technology.

[0009] The above-mentioned technical objectives of this utility model are mainly achieved through the following technical solutions:

[0010] This utility model provides a backwashing high-pressure filter station, which includes a frame and at least one backwashing module disposed within the frame; the backwashing module includes:

[0011] The valve body has an inlet port and an outlet port. The valve body has two parallel filter channels that connect the inlet port and the outlet port. The filter channels are provided with an inlet control valve core and a filter assembly for controlling their opening and closing. The filter assembly is located downstream of the inlet control valve core.

[0012] A pilot valve assembly is mounted on the valve body. The pilot valve assembly includes an electromagnetic pilot valve. The outlet of the electromagnetic pilot valve is connected to the first control port of the inlet control valve core to control the operation of the inlet control valve core.

[0013] A pressure measuring component is mounted on the valve body to measure the pressure difference between the two ends of the filter component in the filter channel. The pressure measuring component is electrically connected to the second control port of the electromagnetic pilot valve.

[0014] When the pressure difference across one of the filter components reaches a threshold, the filter channel containing the filter component whose pressure difference has reached the threshold is closed by the electromagnetic pilot valve and the liquid inlet control valve core, so as to form a flushing channel for unidirectional fluid flow between the two filter components.

[0015] In a preferred embodiment of the present invention, the pilot valve assembly further includes a hydraulically controlled pilot valve core disposed between the electromagnetic pilot valve and the inlet control valve core. The outlet of the electromagnetic pilot valve is connected to the third control port of the hydraulically controlled pilot valve core to control the operation of the hydraulically controlled pilot valve core. The outlet of the hydraulically controlled pilot valve core is connected to the first control port of the inlet control valve core to control the operation of the inlet control valve core.

[0016] In a preferred embodiment of the present invention, the valve body further has a first pilot control channel that connects the liquid inlet hole and the first control port of the liquid inlet control valve core, and the electromagnetic pilot valve is disposed on the first pilot control channel to control the opening and closing of the first pilot control channel.

[0017] In a preferred embodiment of the present invention, a pilot filter element is provided on the first pilot control channel.

[0018] In a preferred embodiment of the present invention, the valve body further has a second pilot control channel that connects the liquid inlet and the third control port of the hydraulic pilot valve core, and the electromagnetic pilot valve is disposed on the second pilot control channel to control the opening and closing of the second pilot control channel;

[0019] The valve body also has a third pilot control channel that connects the liquid inlet hole and the first control port of the liquid inlet control valve core. The liquid control pilot valve core is disposed on the third pilot control channel to control the opening and closing of the third pilot control channel.

[0020] In a preferred embodiment of the present invention, a pilot filter element is provided on the second pilot control channel and / or the third pilot control channel.

[0021] In a preferred embodiment of the present invention, the valve body is provided with a drain hole, and the valve body is also provided with a drain channel connecting the drain hole and the filter channel, with one end of the drain channel located between the liquid inlet control valve core and the filter assembly.

[0022] In a preferred embodiment of this utility model, the sewage discharge channel is provided with a sewage discharge valve core for controlling its opening and closing, and the outlet of the electromagnetic pilot valve is also connected to the fourth control port of the sewage discharge valve core to control the operation of the sewage discharge valve core.

[0023] In a preferred embodiment of this utility model, the valve body is provided with a drain hole, and the valve body is also provided with a drain channel connecting the drain hole and the filter channel. One end of the drain channel is located between the liquid inlet control valve core and the filter assembly. The drain channel is provided with a drain valve core for controlling its opening and closing. The liquid outlet of the liquid-controlled pilot valve core is also connected to the fourth control port of the drain valve core to control the operation of the drain valve core.

[0024] In a preferred embodiment of the present invention, the backwashing high-pressure filter station further includes a control module disposed on the frame. The control module is electrically connected to the pressure measuring component and the electromagnetic pilot valve respectively. The control module can receive signals from the pressure measuring component and send signals to the electromagnetic pilot valve to control the operation of the electromagnetic pilot valve.

[0025] In a preferred embodiment of this utility model, the valve body has a cubic structure;

[0026] The inlet and outlet are respectively located on the left and right sides of the valve body, and the electromagnetic pilot valve is installed on the upper side of the valve body.

[0027] The upper side of the valve body has two liquid inlet control valve core mounting holes that are respectively connected to the two filter channels, and two filter cartridge mounting holes that are respectively connected to the two filter channels; the liquid inlet control valve core is inserted into the liquid inlet control valve core mounting hole, and the filter assembly is inserted into the filter cartridge mounting hole;

[0028] The valve body has two pressure testing holes that are respectively connected to the front and rear ends of the filter channel, and a hydraulic pilot valve core mounting hole that is connected to the second pilot control channel. The pressure testing component is inserted into the pressure testing hole, and the hydraulic pilot valve core is inserted into the hydraulic pilot valve core mounting hole.

[0029] In a preferred embodiment of the present invention, a pilot liquid discharge hole is further provided on the lower side of the valve body. The pilot liquid discharge hole is connected to the electromagnetic pilot valve and the hydraulic pilot valve core respectively. The pilot liquid discharge hole is used for the discharge of pilot liquid in the inlet control valve core and the pilot liquid in the hydraulic pilot valve core.

[0030] In a preferred embodiment of the present invention, at least two liquid inlet holes and at least two liquid outlet holes are respectively provided on the left and right sides of the valve body.

[0031] In a preferred embodiment of the present invention, the filter assembly has a housing and a filter element disposed within the housing. The upper end of the housing is provided with a screw plug, and the lower end of the housing is provided with a support sleeve. A filter ring cavity is formed between the housing and the filter element, and the support sleeve has a filter channel communicating with the filter element.

[0032] In a preferred embodiment of this utility model, the liquid inlet control valve core is a two-position two-way reversing valve core, and the two-position two-way reversing valve core includes:

[0033] The first valve seat has a liquid inlet and a liquid outlet on its side wall, and the first control port is also provided on its side wall.

[0034] A first piston is movably disposed within the first valve seat to open and close the inlet and the outlet. A control chamber communicating with the first control port is formed between the first piston and the first valve seat.

[0035] The valve cover is fixed to the valve body by bolts.

[0036] In a preferred embodiment of this utility model, the hydraulic pilot valve core is a two-position three-way directional valve core, and the two-position three-way directional valve core includes:

[0037] The second valve seat has a return port and the third control port on its side wall;

[0038] A valve cap is threaded to one end of the second valve seat. The valve cap has an inlet on its side wall that can communicate with the return port. A receiving cavity is formed inside the second valve seat and the valve cap.

[0039] A second piston and a piston rod are fitted together and installed in the receiving cavity. A return spring is provided between the piston rod and the valve cap. An outlet is formed in the piston rod that can communicate with the liquid inlet.

[0040] In a preferred embodiment of this utility model, the electromagnetic pilot valve is a two-position three-way reversing valve core, which has a second control port for controlling its reversal and a manual control button.

[0041] Compared with the prior art, the technical solution of this utility model has the following features and advantages:

[0042] 1. The backwashing high-pressure filter station of this utility model has an automatic backwashing function. When the pressure difference between the inlet and outlet is greater than the set value or the time is greater than the set value, the control module controls the backwashing device to perform backwashing. At the same time, this utility model can also realize manual control of backwashing through the manual control button. The two modes of automatic backwashing and manual backwashing can be freely switched.

[0043] 2. The backwashing high-pressure filter station described in this utility model adopts an integrated frame design, which has high equipment strength and is simple and convenient for hoisting and transportation. At the same time, it can avoid damage to the filter device caused by external impacts, falling coal, splashing, etc.

[0044] 3. All valve core components in the backwashing high-pressure filter station described in this utility model are sealed with Glyd rings to ensure good sealing of the backwashing system.

[0045] 4. The filter components in the backwashing high-pressure filter station described in this utility model are designed as separate units, which makes it convenient to assemble and replace the filter elements and improves production efficiency.

[0046] 5. The backwashing high-pressure filter station described in this utility model is a combination structure of an integrated valve body and a cartridge valve core. It is simple and efficient to disassemble and replace, which greatly improves work efficiency. The valve cores are arranged compactly, reducing the overall structural size and lowering costs. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0048] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0049] Figure 1 This is a schematic diagram of the internal channel connection structure of the backwashing high-pressure filter station described in this utility model;

[0050] Figure 2 This is a schematic diagram of the first structure of the backwashing high-pressure filter station described in this utility model;

[0051] Figure 3 This is a schematic diagram of the second structure of the backwashing high-pressure filter station described in this utility model;

[0052] Figure 4 This is a schematic diagram of the first structure of the valve body inside the backwashing high-pressure filter station of this utility model;

[0053] Figure 5 This is a schematic diagram of the second structure of the valve body inside the backwashing high-pressure filter station described in this utility model;

[0054] Figure 6 This is a schematic diagram of the third structure of the valve body inside the backwashing high-pressure filter station described in this utility model;

[0055] Figure 7 This is a schematic diagram of the liquid inlet control valve core in the backwashing high-pressure filter station of this utility model;

[0056] Figure 8 This is a schematic diagram of the structure of the filter assembly in the backwashing high-pressure filter station of this utility model;

[0057] Figure 9 This is a schematic diagram of the structure of the hydraulically controlled pilot valve core in the backwashing high-pressure filter station described in this utility model.

[0058] Explanation of reference numerals in the attached figures:

[0059] 10. Frame; 11. Support column; 12. Base frame; 13. Top frame; 14. Cable tray; 15. Lifting lug; 16. Protective plate; 17. Control module mounting bracket; 18. Hinge; 19. Fastener;

[0060] 20. Valve body; 21. Left side; 211. Liquid inlet; 22. Right side; 221. Liquid outlet; 23. Top side; 231. Liquid inlet control valve core mounting hole; 232. Filter cartridge mounting hole; 233. Drain valve core mounting hole; 234. Electromagnetic pilot valve closing hole; 24. Front side; 241. Pressure test hole; 242. Pilot filter core mounting hole; 243. Hydraulic pilot valve core mounting hole; 25. Bottom side; 251. Drain hole; 252. Pilot liquid discharge hole; 253. Process hole; 26. Drain channel; 27. Filtration channel; 28. Second pilot control channel; 281. Pilot filter element; 29. ​​Third pilot control channel;

[0061] 30. Inlet control valve core; 31. First valve seat; 311. O-ring seal; 312. Retaining ring; 313. Glyd ring; 32. First piston; 33. Valve cover; 34. First inlet; 35. First outlet; 36. First control port; 37. Control chamber; 38. Bolt;

[0062] 40. Filter assembly; 41. Housing; 42. Filter element; 43. Plug; 44. Support sleeve; 45. Snap ring;

[0063] 50. Electromagnetic pilot valve;

[0064] 60. Hydraulic pilot valve core; 61. Second valve seat; 611. Third control port; 612. Return port; 62. Valve cap; 621. Second inlet port; 63. Second piston; 64. Piston rod; 641. Second outlet port; 65. Return spring; 66. Pilot spring; 67. Gasket;

[0065] 70. Drain valve core;

[0066] 80. Control module;

[0067] 90. Pressure testing assembly; 91. Adapter; 92. Shut-off valve core. Detailed Implementation

[0068] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0069] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0071] like Figures 1 to 3 As shown, this utility model provides a backwashing high-pressure filter station, which includes a frame 10 and at least one backwashing module disposed within the frame 10; the backwashing module includes a valve body 20, a pilot valve assembly, and a pressure measuring component 90. The valve body 20 is provided with an inlet port 211 and an outlet port 221. The valve body 20 has two parallel filter channels 27 connecting the inlet port 211 and the outlet port 221. Each filter channel 27 is provided with an inlet control valve core 30 and a filter assembly 40 for controlling its opening and closing. The filter assembly 40 is located downstream of the inlet control valve core 30. The pilot valve assembly is mounted on the valve body 20 and includes an electromagnetic pilot valve 50. The outlet of the electromagnetic pilot valve 50 is connected to the first control port 36 of the inlet control valve core 30, so as to... The inlet control valve core 30 is activated; the pressure measuring component 90 is installed on the valve body 20 to measure the pressure difference between the front and rear ends of the filter component 40 in the filter channel 27. The pressure measuring component 90 is electrically connected to the second control port of the solenoid pilot valve 50. When the pressure difference between the front and rear ends of one of the filter components 40 reaches a threshold, the filter channel 27 where the filter component 40 with the pressure difference reaching the threshold is closed by the solenoid pilot valve 50 and the inlet control valve core 30, so as to form a flushing channel for unidirectional fluid flow between the two filter components 40.

[0072] The backwashing high-pressure filter station described in this utility model can realize automatic backwashing operation of the high-pressure filter station. It adopts an integrated frame design, which has high equipment strength. On the basis of realizing the automatic backwashing function, it can effectively protect the hydraulic components of the system, improve the reliability and service life of the system and the fully mechanized mining equipment, thereby improving the production efficiency of the coal mine, reducing production costs, and increasing production and efficiency.

[0073] The following will describe in detail the specific structure of each part of the backwashing high-pressure filter station described in this utility model, as well as the position and connection relationship between each part.

[0074] The backwashing high-pressure filter station of this utility model has a frame 10, such as Figure 2 and Figure 3 As shown, frame 10 is the external support structure of the filter station, and all the components described below are installed and fixed inside frame 10.

[0075] Specifically, such as Figure 1 and Figure 2 As shown, the frame 10 has an overall cubic structure, including a top frame 13 and a bottom frame 12 that are positioned vertically opposite each other. Multiple support columns 11 connect the top frame 13 and the bottom frame 12. The integrated structural design of the frame 10 improves the strength of the equipment. Cable trays 14 are provided on the support columns 11 of the frame 10, and signal transmission lines between the components within the frame 10 are arranged within the cable trays 14. Lifting lug mounting holes are provided at the four corners of the top frame 13. The lifting lugs 15 are screwed into the lifting lug mounting holes, facilitating the lifting and transportation of the frame 10 and improving efficiency. A protective plate 16 is provided inside the top frame 13. The protective plate 16 is fixedly installed to the top frame 13 via hinges 18 and fasteners 19. The protective plate 16 can prevent damage to the filter device from external impacts, falling coal, and splashes during operation.

[0076] The backwashing high-pressure filter station described in this utility model also has a backwashing module. The backwashing module is used to filter high-pressure oil and can backwash the filter component 40 after the filtration effect of the filter component 40 is reduced to a certain extent, thereby improving the service life of the entire filter station.

[0077] The backwashing module is fixedly installed inside the frame 10. The number of automatic backwashing modules inside the frame 10 can be set according to actual needs. It adopts a modular design, and each backwashing module can be used individually or in groups. In this embodiment, there are two sets of backwashing modules inside the frame 10. The structure of each set of backwashing modules is the same. The structure and working process of one backwashing module will be specifically described below.

[0078] like Figures 1 to 3 As shown, the backwashing module has a valve body 20, which integrates multiple interconnected channels and various functional valve cores.

[0079] Specifically, such as Figures 1 to 6 As shown, the valve body 20 has a rectangular parallelepiped structure. The left side 21 and the right side 22 are respectively provided with an inlet hole 211 and an outlet hole 221. The valve body 20 has two filter channels 27 that connect the inlet hole 211 and the outlet hole 221. The two filter channels 27 are arranged in parallel, and the two ends of the filter channels 27 are connected through the inlet hole 211 and the outlet hole 221.

[0080] To facilitate the opening of corresponding channels on the valve body 20, multiple process holes 253 are opened on each side, which will not be described in detail here; process holes 253 that may cause leakage in the corresponding channels during operation are all sealed with plugs.

[0081] Better, such as Figure 4 As shown, there can be multiple liquid inlet holes 211 on the left side 21 and multiple liquid outlet holes 221 on the right side 22. Multiple liquid inlet holes 211 or multiple liquid outlet holes 221 can serve as backups for each other. In actual use, only one liquid inlet hole 211 and one liquid outlet hole 221 are needed. All other liquid inlet holes 211 and liquid outlet holes 221 are sealed with plugs.

[0082] The upper side 23 of the valve body 20 has two inlet control valve core mounting holes 231, each communicating with one of the two filter channels 27, and two filter cartridge mounting holes 232, each communicating with one of the two filter channels 27. The inlet control valve core 30 is inserted into the inlet control valve core mounting hole 231, thus positioning the inlet control valve core 30 on the filter channel 27. The inlet control valve core 30 can be a reversing valve capable of controlling the opening and closing of the filter channel 27, thereby controlling the opening and closing of the corresponding filter channel 27 according to an external control signal. The filter assembly 40 is inserted into the filter cartridge mounting hole 232, thus positioning the filter assembly 40 on the filter channel 27. The filter assembly 40 contains a filter element 42, thereby filtering the oil within the filter channel 27. Along the filtration direction of the oil within the filter channel 27, the filter assembly 40 is located downstream of the inlet control valve core 30.

[0083] Furthermore, such as Figures 1 to 4 As shown, the backwashing module also has a pilot valve assembly for controlling the aforementioned inlet control valve core 30. The pilot valve assembly includes an electromagnetic pilot valve 50, which is mounted on the upper side 23 of the valve body 20. The inlet control valve core 30 has a first control port 36 that can control its operation to open and close the filter channel 27. In this embodiment, the inlet control valve core 30 is an oil-controlled reversing valve, so the first control port 36 is an oil control port. Two electromagnetic pilot valve closing holes 234 are provided on the upper side 23 of the valve body 20, which are respectively connected to the two first control ports 36. The outlet of the electromagnetic pilot valve 50 is connected to the first control port 36 through the electromagnetic pilot valve closing holes 234, thereby realizing the reversing control of the inlet control valve core 30 through the electromagnetic pilot valve 50.

[0084] The electromagnetic pilot valve 50 is an electrically controlled directional valve with a second control port (electrical signal control port) controlled by an electrical signal. In order to accurately control the switching timing of the electromagnetic pilot valve 50, two pressure measuring holes 241 are provided on the front side 24 of the valve body 20, which are respectively connected to the front and rear ends of the filter channel 27. Pressure measuring components 90 are installed in the pressure measuring holes 241, and the pressure measuring components 90 are electrically connected to the second control port of the electromagnetic pilot valve 50. The two pressure measuring components 90 are used to measure the pressure at the front and rear ends of the filter component 40 in the filter channel 27, and to determine whether the corresponding filter component 40 needs backwashing based on the pressure difference between the two ends, so as to flush and remove impurities in the filter component 40.

[0085] like Figure 1 As shown, when the pressure measuring component 90 detects that the pressure difference across the filter component 40 reaches a preset threshold, backwashing of both filter components 40 is required. At this time, an electrical signal is sent to one of the solenoid pilot valves 50, energizing and reversing the corresponding solenoid pilot valve 50. The solenoid pilot valve 50 controls the corresponding pipeline to open, and the pilot fluid flows through the outlet of the solenoid pilot valve 50 to the first control port 36 of the inlet control valve core 30. The inlet control valve core 30 reverses to close the corresponding filter channel 27. At this time, one filter channel 27 is in the open state, and the other filter channel 27 is in the closed state. Simultaneously, the already closed filter channel 27 is opened. A drain port is located on filter channel 27 between filter assembly 40 and inlet control valve core 30. Oil flows through the inlet control valve core 30 and filter assembly 40 in the open state, through the outlet hole 221, and through the filter assembly 40 in the closed state, before draining out contaminants from the closed filter assembly 40. That is, oil in the open filter channel 27 does not flow out of the outlet hole 221, but instead flows through the outlet hole 221 to the closed filter assembly 40, where it flows in reverse and is then discharged from the drain port. After cleaning, an electrical signal is sent to another solenoid pilot valve 50 to backwash the other filter assembly 40.

[0086] The following will provide a more detailed description of the structure and technical effects of the preferred embodiment of the backwashing high-pressure filter station of this utility model.

[0087] According to one embodiment of the present invention, such as Figures 1 to 6As shown, the valve body 20 also has a first pilot control channel that connects the inlet port 211 and the first control port 36 of the inlet control valve core 30. An electromagnetic pilot valve 50 is located on the first pilot control channel to control its opening and closing. Connecting the inlet port 211 to the electromagnetic pilot valve 50 forms the first pilot control channel for pilot control. Part of the oil in the filter channel 27 is directly used as the pilot control fluid to achieve pilot control, eliminating the need for an additional pilot oil source and simplifying the structure of the entire backwashing module.

[0088] Preferably, since the unfiltered oil in the filter channel 27 is used as the pilot fluid, this prevents impurities in the oil from clogging the corresponding pipes and valve cores. Figure 1 and Figure 4 As shown, the front side 24 of the valve body 20 has two pilot filter element mounting holes 242 that are respectively connected to the two first pilot control channels. A pilot filter element 281 is installed in the pilot filter element mounting hole 242 for filtering the pilot liquid (oil) in the first pilot control channel.

[0089] According to one embodiment of the present invention, such as Figure 1 and Figure 6 As shown, a drain hole 251 is provided on the lower side 25 of the valve body 20. A drain channel 26 is also provided inside the valve body 20, which connects the drain hole 251 and the filter channel 27. One end of the drain channel 26 is located between the liquid inlet control valve core 30 and the filter assembly 40. When it is necessary to backwash the filter assembly 40 on the filter channel 27, the drain channel 26 on the corresponding filter channel 27 is opened.

[0090] Furthermore, the upper side 23 of the valve body 20 is provided with two drain valve core mounting holes 233 that are respectively connected to the two drain channels 26. A drain valve core 70 is installed in the drain valve core mounting hole 233 so that the drain valve core 70 is located on the drain channel 26. The drain valve core 70 is used to control the opening and closing of the drain channel 26. The drain valve core 70 can be a hydraulically controlled reversing valve. Accordingly, the drain valve core 70 has a fourth control port for hydraulically controlled reversing. The outlet of the electromagnetic pilot valve 50 is also connected to the fourth control port of the drain valve core 70 to control the operation of the drain valve core 70. That is, when the electromagnetic pilot valve 50 receives an electrical signal to open the corresponding first pilot control channel, the pilot liquid can flow to the first control port 36 of the inlet control valve core 30 and the fourth control port of the drain valve core 70 at the same time, thereby driving the inlet control valve core 30 and the drain valve core 70 to switch directions, so as to close the corresponding filter channel 27 and open the corresponding drain channel 26, thereby realizing the backwashing operation.

[0091] According to one embodiment of the present invention, such as Figures 1 to 6As shown, the pilot valve assembly of this utility model also has a hydraulically controlled pilot valve core 60, which is disposed between the electromagnetic pilot valve 50 and the inlet control valve core 30. The outlet of the electromagnetic pilot valve 50 is connected to the third control port 611 of the hydraulically controlled pilot valve core 60 to control the operation of the hydraulically controlled pilot valve core 60. The outlet of the hydraulically controlled pilot valve core 60 is connected to the first control port 36 of the inlet control valve core 30 to control the operation of the inlet control valve core 30.

[0092] Due to the limitations of the electromagnetic pilot valve 50's own structure, the flow rate of the pilot fluid in its corresponding pipeline is relatively small when it is open. However, the oil flow rate requirement in the first control port 36 of the inlet control valve core 30, which is used for reversing, is relatively large. In order to improve the reversing sensitivity of the inlet control valve core 30, a hydraulic pilot valve core 60 with a relatively large pilot flow rate is set between the electromagnetic pilot valve 50 and the inlet control valve core 30, thereby improving the reversing response speed of the entire equipment.

[0093] Specifically, such as Figures 1 to 4 As shown, the hydraulically controlled pilot valve core 60 is a hydraulically controlled directional valve with a third control port 611 controlled by hydraulic fluid. The electromagnetic pilot valve 50 and the hydraulically controlled pilot valve core 60 combine to form a two-stage pilot control of the inlet control valve core 30. A second pilot control channel 28 is provided within the valve body 20, connecting the inlet port 211 and the third control port 611 of the hydraulically controlled pilot valve core 60. The electromagnetic pilot valve 50 is located on the second pilot control channel 28 to control its opening and closing. A third pilot control channel 29 is also provided within the valve body 20, connecting the inlet port 211 and the first control port 36 on the inlet control valve core 30. The hydraulically controlled pilot valve core 60 is located on the third pilot control channel 29 to control its opening and closing.

[0094] An electromagnetic pilot valve 50 is mounted on the upper side 23 of the valve body 20. Two electromagnetic pilot valve closing holes 234 on the upper side 23 of the valve body 20 are respectively connected to two third control ports 611. The outlet of the electromagnetic pilot valve 50 is connected to the third control port 611 through the electromagnetic pilot valve closing holes 234, thereby controlling the switching of the hydraulic pilot valve core 60 through the electromagnetic pilot valve 50. Two hydraulic pilot valve core mounting holes 243 are provided on the front side 24 of the valve body 20, which are respectively connected to two third pilot control channels 29. The hydraulic pilot valve core 60 is installed in the hydraulic pilot valve core mounting holes 243 so that the hydraulic pilot valve core 60 is located on the third pilot control channel 29, thereby controlling the switching of the inlet control valve core 30 through the hydraulic pilot valve core 60.

[0095] If the pilot valve assembly uses two-stage pilot control, then correspondingly, such as Figure 1As shown, the pilot filter element 281 is disposed on the second pilot control channel 28 and the third pilot control channel 29; the fourth control port of the drain valve core 70 is connected to the outlet of the hydraulic pilot valve core 60, that is, the operation of the drain valve core 70 is controlled by the hydraulic pilot valve core 60. The placement of the pilot filter element 281 and the drain valve core 70 on the valve body 20 has been described above and will not be repeated here.

[0096] According to one embodiment of the present invention, such as Figures 1 to 3 As shown, the backwashing high-pressure filter station also includes a control module 80 mounted on the frame 10. The control module 80 is electrically connected to the pressure measuring component 90 and the electromagnetic pilot valve 50, respectively. The control module 80 can receive signals from the pressure measuring component 90 and send signals to the electromagnetic pilot valve 50 to control the operation of the electromagnetic pilot valve 50.

[0097] Specifically, a control module mounting bracket 17 is connected to the lower side 25 of the top frame 13, and the control module 80 is fixedly installed on the control module mounting bracket 17. Both pressure measuring components 90 are electrically connected to the control module 80 via signal transmission lines. The pressure signals measured by the pressure measuring components 90 can be transmitted to the control module 80, and the control module 80 can analyze and process the received pressure signals. The control module 80 is electrically connected to the solenoid pilot valve 50 via signal transmission lines, and the control module 80 can send control signals to the solenoid pilot valve 50 based on the analysis results of the pressure signals to control its switching.

[0098] According to one embodiment of the present invention, such as Figure 1 and Figure 6 As shown, the lower side 25 of the valve body 20 is also provided with a pilot liquid discharge hole 252. The pilot liquid discharge hole 252 is connected to the solenoid pilot valve 50 and the hydraulic pilot valve core 60 respectively. The pilot liquid discharge hole 252 is used to discharge the pilot liquid in the inlet control valve core 30 and the pilot liquid in the hydraulic pilot valve core 60.

[0099] According to one embodiment of the present invention, such as Figure 1 and Figure 3 As shown, a shut-off valve core 92 is installed in a process hole 253 on the front side 24 of the valve body 20, which is connected to the filter channel 27, via an adapter 91. The shut-off valve core 92 is located downstream of the filter assembly 40. The filter assembly 40 needs to be disassembled before removal; therefore, the shut-off valve core 92 can be opened to release pressure in the filter channel 27 to prevent excessive pressure from injuring people or damaging property.

[0100] According to one embodiment of the present invention, such as Figure 2 and Figure 7As shown, the inlet control valve core 30 is a two-position, two-way reversing valve core, comprising a first valve seat 31, a first piston 32, and a valve cover 33. The first valve seat 31 has a first inlet port 34 and a first outlet port 35 on its side wall, and a first control port 36 is also provided on its side wall. The first piston 32 is movably disposed within the first valve seat 31 to open and close the inlet and outlet ports. A control chamber 37 communicating with the first control port 36 is formed between the first piston 32 and the first valve seat 31. The valve cover 33 is fixed to the valve body 20 by bolts 38. The inlet control valve core 30 adopts a cartridge-type valve core structure, which is simple and efficient for disassembly and replacement, while also allowing for a compact valve core arrangement, reducing the overall structural size and lowering costs.

[0101] Better, such as Figure 7 As shown, sealing grooves are provided on the outer peripheral surface of the first valve seat 31 and the outer peripheral surface of the valve cover 33, and O-rings 311 and retaining rings 312 are provided in these sealing grooves. Sealing grooves are also provided on the inner peripheral surface of the first valve seat 31 and the outer peripheral surface of the first piston 32, and Glyd rings 313 are provided in these sealing grooves. The liquid inlet control valve core 30 is sealed with O-rings 311 and Glyd rings 313 to ensure good sealing of the backflushing system. The Glyd ring 313 is composed of an O-ring made of reinforced polytetrafluoroethylene (RPTFE) and nitrile rubber. RPTFE is polytetrafluoroethylene with added graphite content, which has self-lubricating and corrosion-resistant properties. The static O-ring element on the inner side has the characteristics of low permanent deformation, which can solve the stick-slip movement and easy extrusion phenomenon of the O-ring plus retaining ring structure, and at the same time, it can greatly reduce the sealing leakage and improve product reliability.

[0102] According to one embodiment of the present invention, such as Figure 2 and Figure 8 As shown, the filter assembly 40 has a housing 41 and a filter element 42 disposed within the housing 41. A screw plug 43 is provided at the upper end of the housing 41, and a support sleeve 44 is provided at the lower end of the housing 41. A retaining ring 45 is provided between the support sleeve 44 and the housing 41. A filter ring cavity is formed between the housing 41 and the filter element 42. The support sleeve 44 has filter channels communicating with the filter element 42. Oil enters the filter element 42 through the filter channels, is filtered, and then flows into the filter ring cavity, exiting through the outlet at the lower end of the filter ring cavity; the oil can also flow in the reverse direction.

[0103] The filter assembly 40 is installed facing downwards, while the top opening of the housing 41 faces upwards for easy installation and maintenance. During installation, the support sleeve 44 is first placed into the filter cartridge mounting hole 232, then the retaining ring 45 is placed on the support sleeve 44. Next, the housing 41 is tightened onto the filter cartridge mounting hole 232 of the valve body 20 using screws. The filter element 42 is then placed into the inner cavity of the housing 41, and the plug 43 is tightened into the top opening of the housing 41. When replacing or maintaining the filter element 42, simply remove the plug 43 to remove the filter element 42; this convenient replacement saves time and improves production efficiency.

[0104] According to one embodiment of the present invention, such as Figure 9 As shown, the hydraulic pilot valve core 60 is a two-position three-way reversing valve core, which includes a second valve seat 61, a valve cap 62, a second piston 63, and a piston rod 64. The second valve seat 61 has a return port 612 and a third control port 611 on its side wall; the valve cap 62 is threaded to one end of the second valve seat 61, and a second inlet port 621 that communicates with the return port 612 is opened on its side wall; a receiving cavity is formed inside the second valve seat 61 and the valve cap 62; the second piston 63 and the piston rod 64 are sleeved together and installed in the receiving cavity; a return spring 65 is provided between the piston rod 64 and the valve cap 62; a pilot spring 66 is provided in the inner hole at the upper end of the second piston 63; and a second outlet port 641 that communicates with the second inlet port 621 is formed inside the piston rod 64. The hydraulic pilot valve core 60 adopts a cartridge valve core structure, which is simple and efficient to disassemble and replace. At the same time, it can make the valve core arrangement compact, reduce the overall structural size, and reduce costs.

[0105] Better, such as Figure 9 As shown, a retaining ring 312 and a PEEK gasket (a gasket made of PEEK material) are provided between the second valve seat 61 and the valve cap 62. The retaining ring 312 is placed on the inner step of the second valve seat 61, and the PEEK gasket is placed on the retaining ring 312. Sealing grooves are formed on the outer circumferential surfaces of the second valve seat 61 and the valve cap 62, and O-rings 311 are installed in these sealing grooves. Sealing grooves are also formed on the inner circumferential surface of the valve cap 62, the outer circumferential surface of the second piston 63, and the outer circumferential surface of the piston rod 64, and Glyd rings 313 are installed in these sealing grooves. The hydraulic pilot valve core 60 is sealed with O-rings 311 and Glyd rings 313 to ensure good sealing of the backflush system.

[0106] The structure of the drain valve core 70 is basically the same as that of the hydraulic pilot valve core 60. Both are two-position three-way reversing valve cores, which will not be described in detail here.

[0107] According to one embodiment of this utility model, the electromagnetic pilot valve 50 is a two-position three-way reversing valve core. The two-position three-way reversing valve core has a second control port for controlling its reversal and a manual control button. The second control port realizes automatic control through the control module 80, and can also realize manual control of backflush through the manual control button. The two modes of automatic backflush and manual backflush can be freely switched.

[0108] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A backwashing high-pressure filter station, characterized in that, Includes a frame (10) and at least one backwash module disposed within the frame (10); the backwash module includes: A valve body (20) is provided with an inlet hole (211) and an outlet hole (221). The valve body (20) has two parallel filter channels (27) that connect the inlet hole (211) and the outlet hole (221). The filter channels (27) are provided with an inlet control valve core (30) and a filter assembly (40) for controlling their opening and closing. The filter assembly (40) is located downstream of the inlet control valve core (30). A pilot valve assembly is installed on the valve body (20). The pilot valve assembly has an electromagnetic pilot valve (50). The outlet of the electromagnetic pilot valve (50) is connected to the first control port (36) of the inlet control valve core (30) to control the operation of the inlet control valve core (30). A pressure measuring component (90) is installed on the valve body (20) to measure the pressure difference between the two ends of the filter component (40) in the filter channel (27). The pressure measuring component (90) is electrically connected to the second control port of the electromagnetic pilot valve (50). When the pressure difference across one of the filter components (40) reaches a threshold, the filter channel (27) where the filter component (40) with the pressure difference across the threshold is located is closed by the electromagnetic pilot valve (50) and the liquid inlet control valve core (30) to form a flushing channel for unidirectional fluid flow between the two filter components (40).

2. The backwashing high-pressure filter station according to claim 1, characterized in that, The pilot valve assembly also includes a hydraulic pilot valve core (60) disposed between the electromagnetic pilot valve (50) and the liquid inlet control valve core (30). The outlet of the electromagnetic pilot valve (50) is connected to the third control port (611) of the hydraulic pilot valve core (60) to control the operation of the hydraulic pilot valve core (60). The outlet of the hydraulic pilot valve core (60) is connected to the first control port (36) of the liquid inlet control valve core (30) to control the operation of the liquid inlet control valve core (30).

3. The backwashing high-pressure filter station according to claim 1, characterized in that, The valve body (20) also has a first pilot control channel that connects the liquid inlet (211) and the first control port (36) on the liquid inlet control valve core (30). The electromagnetic pilot valve (50) is located on the first pilot control channel to control the opening and closing of the first pilot control channel.

4. The backwashing high-pressure filter station according to claim 3, characterized in that, The first pilot control channel is equipped with a pilot filter element (281).

5. The backwashing high-pressure filter station according to claim 2, characterized in that, The valve body (20) also has a second pilot control channel (28) that connects the liquid inlet (211) and the third control port (611) on the hydraulic pilot valve core (60). The electromagnetic pilot valve (50) is located on the second pilot control channel (28) to control the opening and closing of the second pilot control channel (28). The valve body (20) also has a third pilot control channel (29) that connects the liquid inlet hole (211) and the first control port (36) on the liquid inlet control valve core (30). The liquid control pilot valve core (60) is located on the third pilot control channel (29) to control the opening and closing of the third pilot control channel (29).

6. The backwashing high-pressure filter station according to claim 5, characterized in that, A pilot filter element (281) is provided on the second pilot control channel (28) and / or the third pilot control channel (29).

7. The backwashing high-pressure filter station according to claim 1 or 3, characterized in that, The valve body (20) is provided with a drain hole (251), and the valve body (20) is also provided with a drain channel (26) that connects the drain hole (251) and the filter channel (27). One end of the drain channel (26) is located between the liquid inlet control valve core (30) and the filter assembly (40).

8. The backwashing high-pressure filter station according to claim 7, characterized in that, The sewage discharge channel (26) is provided with a sewage discharge valve core (70) for controlling its opening and closing. The outlet of the electromagnetic pilot valve (50) is also connected to the fourth control port of the sewage discharge valve core (70) to control the operation of the sewage discharge valve core (70).

9. The backwashing high-pressure filter station according to claim 2 or 5, characterized in that, The valve body (20) is provided with a drain hole (251), and the valve body (20) is also provided with a drain channel (26) that connects the drain hole (251) and the filter channel (27). One end of the drain channel (26) is located between the liquid inlet control valve core (30) and the filter assembly (40). The drain channel (26) is provided with a drain valve core (70) for controlling its opening and closing. The liquid outlet of the liquid control pilot valve core (60) is also connected to the fourth control port of the drain valve core (70) to control the operation of the drain valve core (70).

10. The backwashing high-pressure filter station according to claim 1, characterized in that, The backwashing high-pressure filter station also includes a control module (80) mounted on the frame (10). The control module (80) is electrically connected to the pressure measuring component (90) and the electromagnetic pilot valve (50). The control module (80) can receive signals from the pressure measuring component (90) and send signals to the electromagnetic pilot valve (50) to control the operation of the electromagnetic pilot valve (50).

11. The backwashing high-pressure filter station according to claim 5, characterized in that, The valve body (20) has a cubic structure; The liquid inlet (211) and the liquid outlet (221) are respectively provided on the left side (21) and right side (22) of the valve body (20), and the electromagnetic pilot valve (50) is installed on the upper side (23) of the valve body (20); The upper side (23) of the valve body (20) is provided with two liquid inlet control valve core mounting holes (231) that are respectively connected to the two filter channels (27), and two filter cartridge mounting holes (232) that are respectively connected to the two filter channels (27); the liquid inlet control valve core (30) is inserted into the liquid inlet control valve core mounting hole (231), and the filter assembly (40) is inserted into the filter cartridge mounting hole (232); The valve body (20) has two pressure measuring holes (241) on its front side (24) that are respectively connected to the front and rear ends of the filter channel (27), and a hydraulic pilot valve core mounting hole (243) that is connected to the second pilot control channel (28). The pressure measuring assembly (90) is inserted into the pressure measuring hole (241), and the hydraulic pilot valve core (60) is inserted into the hydraulic pilot valve core mounting hole (243).

12. The backwashing high-pressure filter station according to claim 11, characterized in that, The lower side (25) of the valve body (20) is also provided with a pilot liquid discharge hole (252). The pilot liquid discharge hole (252) is connected to the electromagnetic pilot valve (50) and the hydraulic pilot valve core (60) respectively. The pilot liquid discharge hole (252) is used for the discharge of pilot liquid in the liquid inlet control valve core (30) and pilot liquid in the hydraulic pilot valve core (60).

13. The backwashing high-pressure filter station according to claim 11, characterized in that, The valve body (20) has at least two liquid inlet holes (211) and at least two liquid outlet holes (221) on its left side (21) and right side (22), respectively.

14. The backwashing high-pressure filter station according to claim 1 or 11, characterized in that, The filter assembly (40) has a housing (41) and a filter element (42) disposed inside the housing (41). The upper end of the housing (41) is provided with a screw plug (43), and the lower end of the housing (41) is provided with a support sleeve (44). A filter ring cavity is formed between the housing (41) and the filter element (42). The support sleeve (44) has a filter channel communicating with the filter element (42).

15. The backwashing high-pressure filter station according to claim 11, characterized in that, The liquid inlet control valve core (30) is a two-position two-way reversing valve core, which includes: The first valve seat (31) has a liquid inlet and a liquid outlet on its side wall, and the first control port (36) is also provided on its side wall. A first piston (32) is movably disposed in the first valve seat (31) to open and close the liquid inlet and the liquid outlet. A control chamber (37) communicating with the first control port (36) is formed between the first piston (32) and the first valve seat (31). Valve cover (33), which is fixed to the valve body (20) by bolts (38).

16. The backwashing high-pressure filter station according to claim 11, characterized in that, The hydraulic pilot valve core (60) is a two-position three-way directional valve core, which includes: The second valve seat (61) has a return port (612) and the third control port (611) on its side wall; Valve cap (62) is threaded to one end of the second valve seat (61). The valve cap (62) has an inlet on its side wall that can communicate with the return port (612). The second valve seat (61) and the valve cap (62) form a receiving cavity. A second piston (63) and a piston rod (64) are fitted together. The second piston (63) and the piston rod (64) are installed in the receiving cavity. A return spring (65) is provided between the piston rod (64) and the valve cap (62). An outlet is formed in the piston rod (64) that can communicate with the liquid inlet.

17. The backwashing high-pressure filter station according to claim 11, characterized in that, The electromagnetic pilot valve (50) is a two-position three-way reversing valve core, which has a second control port for controlling its reversal and a manual control button.

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