Gate valve with filtering function

Abstract

The application discloses a gate valve with a filtering function, and belongs to the technical field of gate valves. A gate valve assembly is arranged between an output pipeline and an input pipeline, a filtering assembly is arranged inside the gate valve assembly for filtering, an overflow valve assembly is arranged between a reflux pipeline and a connecting pipeline, the inside of a gate plate is hollow, and the filtering assembly is arranged inside the gate plate. When the passive block inside the movable groove two on the bottom plate moves outward and is inserted into the limiting groove one on the sealing block one, the filtering assembly is connected with the sealing block one. At this time, the passive block in the movable groove one is retracted, so that when the gate plate is lifted to open the gate, the filtering assembly filters in the middle. When the passive block inside the movable groove one on the top plate moves outward and is inserted into the limiting groove two on the inside of the gate plate, the filtering assembly moves upward together with the gate plate, so that the filtering assembly does not filter, and filtering can be conveniently switched.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gate valves, and more particularly to a gate valve with a filtering function. BACKGROUND

[0002] A gate valve is a common type of shut-off valve, mainly used for cutting off or connecting fluid (such as liquid, gas) in a pipeline system, and is not used for flow regulation. Its core feature is to control the opening and closing of fluid by moving a "gate plate" perpendicular to the fluid direction up and down. The gate plate has a wedge or parallel plate structure and is moved up and down by a valve stem. When fully raised, the valve is fully open and fluid can pass through almost without resistance. When fully lowered, the gate plate presses against the sealing surface, cutting off the fluid.

[0003] A power-driven filtering gate valve is disclosed in Chinese Patent No. CN219712470U. A fixed plate and a rotating plate are installed on the inlet pipe of the gate valve, and a filter plate is arranged on each of the fixed plate and the rotating plate. The rotating plate can rotate relative to the fixed plate, causing the filter holes of the fixed plate and the rotating plate to be misaligned, thereby adjusting the filter hole diameter. This prevents the filter hole from being too large or too small, increasing the practicality of the gate valve and allowing it to be used with different density media. The fixed plate and the rotating plate are installed on the inlet pipe by tightening bolts, and the rotating plate has a guide hole. The guide hole allows the rotating plate to rotate relative to the fixed plate, preventing interference between the rotating plate and the tightening bolts.

[0004] In agricultural irrigation, river water and reservoir water are often used for irrigation, but during heavy rain and flood periods, they carry a large amount of silt, algae, or suspended matter. In this case, filtration is required, but when the water quality is good, filtration is not necessary. If filtration is performed continuously for a long period of time, the filter screen will be frequently clogged, increasing maintenance costs. In the above-mentioned scheme or existing technology, when switching between filtering and not filtering, the gate valve pipeline system needs to be disassembled and replaced, causing inconvenience in filtering switching.

[0005] Therefore, it is necessary to provide a gate valve with a filtering function to solve the above problems. SUMMARY

[0006] The present application provides a gate valve with a filtering function, which can improve the inconvenience of filtering switching in related art when switching between filtering and not filtering.

[0007] The embodiment of the present application provides a gate valve with a filtering function, which comprises an output pipeline, an input pipeline, a filtering assembly, a backflow pipeline and a connecting pipeline, a gate valve assembly is arranged between the output pipeline and the input pipeline, the filtering assembly is arranged inside the gate valve assembly and is used for filtering, an overflow valve assembly is arranged between the backflow pipeline and the connecting pipeline, the filtering assembly comprises a driving plate, a plurality of passive blocks and a plurality of driving rods, one end of each of the plurality of driving rods is fixedly connected with the outer end of the driving plate, two driving blocks are fixedly installed at the outer end of the driving rod, the passive blocks are matched with the driving blocks, the two driving blocks fixedly installed at the outer end of the driving rod face opposite directions, the driving rod drives the driving blocks to move through the driving plate, the driving blocks are driven to move by extrusion, and the moving directions of the driving blocks and the passive blocks are perpendicular to each other.

[0008] The technical scheme described above in the embodiment of the present application has at least the following technical effects:

[0009] (1) The inside of the gate plate is hollow, the filtering assembly is arranged inside the gate plate, when the passive blocks inside the movable groove two of the bottom plate move outward and are inserted into the limiting groove one on the sealing block one, the filtering assembly is connected with the sealing block one, at this time, the passive blocks in the movable groove one retract, so that when the gate plate rises and opens, the filtering assembly filters in the middle, when the passive blocks inside the movable groove one of the top plate move outward and are inserted into the limiting groove two inside the gate plate, the filtering assembly moves upward together with the gate plate, so that the filtering assembly does not filter, and filtering can be conveniently switched.

[0010] (2) The overflow valve assembly is installed at the outer end of the water inlet pipe through the connecting pipeline, when the filtering assembly is blocked, the pressure in the pipeline increases, at this time, the excessive pressure will flush away the valve core in the overflow valve assembly, so that the water flow bypasses the gate valve assembly through the backflow pipeline, thereby preventing the pipeline from being damaged due to excessive pressure.

[0011] (3) When the pressing plate in the overflow valve assembly is moved to the innermost top end of the upper shell, the downward pressure on the valve core is reduced, at this time, the two cut-off devices on the middle section pipelines are closed, and the sealing disc is disassembled, so that the water flow passes through the water inlet pipe, the connecting pipeline, the backflow pipeline and the output pipeline in turn, and then reversely flushes the filtering assembly, so that the filtered garbage is discharged through the blowdown pipeline, thereby achieving the effect of backwashing and cleaning, and facilitating blowdown maintenance.

[0012] In some embodiments, the output pipe and the input pipe are fixedly connected with a middle pipe at one end, and the other end of the two middle pipes is fixedly connected with a water outlet pipe and a water inlet pipe respectively, and the two middle pipes are internally provided with a cut-off device for cutting off water flow, wherein one of the cut-off devices is used to control the communication between the output pipe and the water outlet pipe, and the other cut-off device is used to control the communication between the input pipe and the water inlet pipe.

[0013] In some embodiments, the input pipe is fixedly connected with a blowdown pipe at the outer end, the blowdown pipe is in communication with the inside of the input pipe, and the outer end of the blowdown pipe is detachably provided with a sealing disc; one end of the return pipe is fixedly connected with the outer end of the output pipe, and the return pipe is in communication with the inside of the output pipe; one end of the connecting pipe is fixedly connected with the outer end of the water inlet pipe, and the connecting pipe is in communication with the inside of the water inlet pipe.

[0014] In some embodiments, the gate valve assembly comprises a valve shell and a gate plate, the output pipe and the input pipe are fixedly installed on both sides of the valve shell, the valve shell is internally provided with a water outlet cavity and a water inlet cavity, the water outlet cavity is in communication with the output pipe, the water inlet cavity is in communication with the input pipe, the water outlet cavity and the water inlet cavity are internally fixedly installed with a sealing ring, the gate plate is located between the water outlet cavity and the water inlet cavity, the gate plate is provided with a sealing surface one on both sides, the gate plate is sealed by the sealing surface one and the sealing ring, the inside of the gate plate is hollow, and the gate plate is sleeved outside the filter assembly.

[0015] In some embodiments, the gate valve assembly further comprises a valve cover and a valve rod, the valve shell is internally fixedly installed with a limiting ring, the valve cover is fixedly installed on the top of the valve shell, the top of the valve cover is fixedly installed with a fixing frame, the inside of the fixing frame is fixedly installed with a threaded sleeve, the valve rod is threadedly connected with the threaded sleeve, and the bottom of the valve rod extends to the inside of the valve shell through the valve cover, the bottom end of the valve rod is rotationally connected with the gate plate, and the top of the valve rod is fixedly installed with a rotating wheel.

[0016] In some embodiments, the gate valve assembly further comprises a movable disc, the bottom of the valve shell is fixedly installed with a connecting disc, the connecting disc is detachably connected with the movable disc, the bottom of the valve shell is provided with a mounting hole for dismounting and mounting the filter assembly, the top of the movable disc is fixedly installed with a sealing block one, the top of the sealing block one is installed with a sealing gasket, the bottom of the gate plate is provided with a sealing surface two, the sealing block one extends to the inside of the valve shell through the mounting hole, the sealing gasket is sealed by abutting against the sealing surface two, and the bottom of the movable disc is detachably installed with a sealing block two.

[0017] In some embodiments, the filter assembly further comprises a fixed plate, a top plate and a bottom plate, the top plate and the bottom plate are respectively fixedly installed on the top and bottom of the fixed plate, a mounting rack is detachably installed on the outer end of the fixed plate, a filter screen is installed on the inner side of the mounting rack, a plurality of movable grooves one are formed on the outer end of the top plate, a plurality of movable grooves two are formed on the outer end of the bottom plate, the driving rod is located inside the movable groove one, the driving rod extends to the outside through the movable groove two, the threaded rod one is in threaded connection with the driving plate, one end of the threaded rod one is in rotational connection with the inner side of the bottom plate, and the driving plate drives the driving rod to move through the threaded rod one.

[0018] In some embodiments, the outer end of the driving block is provided with an inclined surface one, the outer end of the passive block is provided with an inclined surface two, the inclined surface two is in abutment with the inclined surface one, a plurality of passive blocks are respectively in sliding connection with the movable groove one and the movable groove two, the outer side of the inclined surface one is fixedly installed with a sliding block, the outer side of the inclined surface two is formed with a sliding groove, the sliding block is in sliding connection with the sliding groove, a plurality of limiting grooves one are formed on the inner side of the sealing block one, a plurality of limiting grooves two are formed in the inner part of the shutter, the driving block extrudes the inclined surface two through the inclined surface one to force the passive block to move outward, the passive block moves into the limiting groove two to follow the shutter to move, and the passive block moves into the limiting groove one to follow the sealing block one to move.

[0019] In some embodiments, the overflow valve assembly comprises a lower valve body and an upper shell, the upper shell is fixedly installed on the top of the lower valve body, and the inner part of the upper shell is in communication with the inner part of the lower valve body, the inner part of the lower valve body is respectively provided with a water outlet channel and a water inlet channel, the two ends of the lower valve body are respectively connected with the connecting pipeline and the return pipeline, the water inlet channel is in communication with the connecting pipeline, and the water outlet channel is in communication with the return pipeline.

[0020] In some embodiments, the overflow valve assembly further comprises a threaded rod two and a valve core, a threaded block is fixedly installed on the top of the upper shell, the threaded rod two is in threaded connection with the threaded block, the bottom end of the threaded rod two extends to the inside through the top of the upper shell, a pressing plate is rotatably connected with the bottom end of the threaded rod two, the pressing plate is in sliding connection with the inner wall of the upper shell, an active plate is fixedly connected with the top of the valve core, a telescopic spring is installed between the active plate and the pressing plate, and the valve core is sealed downward at the communication position of the water outlet channel and the water inlet channel through the action force of the telescopic spring. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 The overall structural schematic diagram provided for the embodiments of the present application;

[0023] Figure 2 The local enlarged structural schematic diagram provided for the embodiments of the present application;

[0024] Figure 3 The sectional structural schematic diagram of the gate valve assembly provided for the embodiments of the present application;

[0025] Figure 4 The enlarged structural schematic diagram of the gate valve assembly provided for the embodiments of the present application;

[0026] Figure 5 The local exploded structural schematic diagram of the gate valve assembly provided for the embodiments of the present application;

[0027] Figure 6 The sectional structural schematic diagram of the gate plate provided for the embodiments of the present application;

[0028] Figure 7 The structural schematic diagram of the filter assembly provided for the embodiments of the present application;

[0029] Figure 8 The sectional structural schematic diagram of the filter assembly provided for the embodiments of the present application;

[0030] Figure 9 The local structural schematic diagram of the filter assembly provided for the embodiments of the present application;

[0031] Figure 10 The structural schematic diagram of the active block and passive block provided for the embodiments of the present application;

[0032] Figure 11 The sectional structural schematic diagram of the overflow valve assembly provided for the embodiments of the present application;

[0033] Figure 12 The local structural schematic diagram of the overflow valve assembly provided for the embodiments of the present application.

[0034] Explanation of the reference signs in the drawings:

[0035] 1, output pipeline;

[0036] 2, input pipeline;

[0037] 3, middle section pipeline;

[0038] 4. water outlet pipe;

[0039] 5. water inlet pipe;

[0040] 6. return pipe;

[0041] 7. filter assembly; 71, fixing plate; 72, top plate; 73, bottom plate; 74, mounting frame; 75, filter screen; 76, driving rod; 77, driving plate; 78, threaded rod I; 79, driving block; 710, passive block; 711, sliding groove; 712, sliding block; 713, inclined surface I; 714, inclined surface II; 715, movable slot I; 716, movable slot II;

[0042] 8. gate valve assembly; 81, valve shell; 82, valve cover; 83, limiting ring; 84, valve rod; 85, fixing frame; 86, threaded sleeve; 87, rotating wheel; 88, gate plate; 89, sealing ring; 810, connecting disc; 811, movable disc; 812, sealing gasket; 813, limiting groove I; 814, sealing surface I; 815, sealing block I; 816, sealing block II; 817, limiting groove II; 818, sealing surface II; 819, water outlet cavity; 820, water inlet cavity;

[0043] 9. overflow valve assembly; 91, upper shell; 92, lower valve body; 93, pressing plate; 94, telescopic spring; 95, threaded rod II; 96, threaded block; 97, valve core; 98, movable plate; 99, water outlet passage; 910, water inlet passage;

[0044] 10. blowdown pipe;

[0045] 11. sealing disc;

[0046] 12. connecting pipe;

[0047] 13. intercepting device. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0049] Please refer to Figures 1-12The utility model provides a gate valve with filtering function, including: output pipeline 1, input pipeline 2, filter assembly 7, backflow pipeline 6 and connecting pipeline 12, be provided with gate valve assembly 8 between output pipeline 1 and input pipeline 2, filter assembly 7 is located inside gate valve assembly 8 for filtering, be provided with overflow valve assembly 9 between backflow pipeline 6 and connecting pipeline 12, filter assembly 7 includes drive plate 77, a plurality of passive blocks 710 and a plurality of drive rods 76, a plurality of drive rods 76 one end is fixedly connected with the outer end of drive plate 77, and two driving blocks 79 are fixedly installed on the outer end of drive rod 76, and passive block 710 is adapted with driving block 79, and the two driving blocks 79 fixedly installed on the outer end of drive rod 76 are opposite, and drive rod 76 moves driving block 79 by drive plate 77, and driving block 79 moves passive block 710 by extrusion drive, and the moving direction of driving block 79 and passive block 710 is perpendicular to each other.

[0050] In natural water bodies such as rivers, reservoirs, lakes or part of industrial circulating water systems, water quality may change dramatically due to climate, environment or operating conditions, resulting in a sharp increase in the concentration of suspended solids, algae, silt or other impurities in the water, for example, during the rainstorm or flood period: surface runoff washes the soil, carrying a large amount of silt and humus into the water intake, if continuous filtration is used, the filter screen will be frequently blocked due to long-term interception of low-concentration impurities, increasing the cleaning frequency and energy consumption, while intermittent filtration can be quickly enabled when water quality deteriorates, and kept running at low resistance during normal periods. The device in the present scheme is mainly used for controlling intermittent filtration in agricultural irrigation.

[0051] The gate valve assembly 8 in the present scheme is installed on both sides of the output pipeline 1 and the input pipeline 2, and the filter assembly 7 for filtering is installed inside the gate valve assembly 8. The inside of the gate plate 88 is hollow, and the filter assembly 7 is arranged inside the gate plate 88. When the passive block 710 inside the movable groove two 716 on the bottom plate 73 moves outward and inserts into the limiting groove one 813 on the sealing block one 815, the filter assembly 7 will be connected with the sealing block one 815. At this time, the passive block 710 in the movable groove one 715 will retract, so that the gate plate 88 rises to open the gate. When the passive block 710 inside the movable groove one 715 on the top plate 72 moves outward and inserts into the limiting groove two 817 on the inside of the gate plate 88, the filter assembly 7 will move upward with the gate plate 88, so that the filter assembly 7 does not filter, thereby conveniently switching the filter.

[0052] On both sides of the overflow valve assembly 9 are connected with the connecting pipeline 12 and the backflow pipeline 6. The overflow valve assembly 9 is mainly used for safety overflow, and can also have the effect of backwashing the filter assembly 7.

[0053] Optionally, in some embodiments, please refer to Figure 1 and Figure 2, the output pipe 1 and the input pipe 2 are fixedly installed with middle pipes 3 at one end, the two middle pipes 3 are fixedly installed with water outlet pipes 4 and water inlet pipes 5 at the other end respectively, and the two middle pipes 3 are internally installed with cut-off devices 13 for cutting off, one of the cut-off devices 13 is used for controlling the communication between the output pipe 1 and the water outlet pipe 4, and the other cut-off device 13 is used for controlling the communication between the input pipe 2 and the water inlet pipe 5.

[0054] The outer end of the input pipe 2 is fixedly connected with a blowdown pipe 10, the blowdown pipe 10 is communicated with the inside of the input pipe 2, the outer end of the blowdown pipe 10 is detachably installed with a sealing disc 11, one end of the backflow pipe 6 is fixedly connected with the outer end of the output pipe 1, and the backflow pipe 6 is communicated with the inside of the output pipe 1, one end of the connecting pipe 12 is fixedly connected with the outer end of the water inlet pipe 5, and the connecting pipe 12 is communicated with the inside of the water inlet pipe 5.

[0055] The output pipe 1 in the scheme is connected with the middle pipe 3 through a flange at the end away from the gate valve assembly 8, and the other end of the middle pipe 3 is connected with the water outlet pipe 4 through a flange, one end of the input pipe 2 is also connected with the middle pipe 3 through a flange, and the other end of the middle pipe 3 is connected with the water inlet pipe 5 through a flange, the water inlet pipe 5 and the water outlet pipe 4 are connected with the pipeline system outside through flanges, and the cut-off devices 13 are installed in the two middle pipes 3, the cut-off device 13 is a butterfly valve, which controls the on-off or flow regulation of fluid by rotating the valve plate, and only needs 90° rotation to complete the opening and closing, the operation is rapid, the flow passage is smooth when fully opened, and is suitable for large flow application, and the cut-off device 13 is mainly used for blocking the two middle pipes 3 to prevent water flow when backwashing.

[0056] The outer end of the input pipe 2 is fixed with the blowdown pipe 10, the blowdown pipe 10 is communicated with the inside of the input pipe 2, and the outer end of the blowdown pipe 10 is fixed with the sealing disc 11 through bolts, the sealing disc 11 mainly plays a role of closing the blowdown pipe 10, and the blowdown pipe 10 mainly plays a role of discharging garbage when backwashing.

[0057] The outer end of the water inlet pipe 5 is fixed with the connecting pipe 12, and the outer end of the output pipe 1 is fixed with the backflow pipe 6, and the overflow valve assembly 9 is installed between the connecting pipe 12 and the backflow pipe 6, when the filter assembly 7 is blocked, the pressure in the pipeline increases, at this time, the excessive pressure will open the valve core 97 in the overflow valve assembly 9, so that the water flows through the backflow pipe 6 to bypass the gate valve assembly 8, thereby preventing the pipeline from being damaged due to excessive pressure.

[0058] Optionally, in some embodiments, please refer to Figures 1-6The gate valve assembly 8 comprises a valve shell 81 and a gate plate 88, the output pipeline 1 and the input pipeline 2 are fixedly installed on both sides of the valve shell 81 respectively, the valve shell 81 is internally provided with a water outlet cavity 819 and a water inlet cavity 820 respectively, the water outlet cavity 819 is communicated with the output pipeline 1, the water inlet cavity 820 is communicated with the input pipeline 2, the water outlet cavity 819 and the water inlet cavity 820 are both fixedly installed with a sealing ring 89 on the inner side, the gate plate 88 is located between the water outlet cavity 819 and the water inlet cavity 820, and the gate plate 88 is provided with a sealing surface one 814 on both sides, the gate plate 88 is sealed by the sealing surface one 814 and the sealing ring 89, the gate plate 88 is hollow inside, and the gate plate 88 is sleeved outside the filter assembly 7.

[0059] The gate valve assembly 8 further comprises a valve cover 82 and a valve rod 84, the valve shell 81 is fixedly installed with a limiting ring 83 on the inner side, the valve cover 82 is fixedly installed on the top of the valve shell 81, the valve cover 82 is fixedly installed with a fixed frame 85 on the top, the fixed frame 85 is fixedly installed with a threaded sleeve 86 on the inner side, the valve rod 84 is threadedly connected with the threaded sleeve 86, and the bottom of the valve rod 84 extends to the inside of the valve shell 81 through the valve cover 82, the bottom end of the valve rod 84 is rotationally connected with the gate plate 88, and the top of the valve rod 84 is fixedly installed with a rotating wheel 87.

[0060] The gate valve assembly 8 further comprises a movable disc 811, the valve shell 81 is fixedly installed with a connecting disc 810 on the bottom, the connecting disc 810 is detachably connected with the movable disc 811, the valve shell 81 is provided with a mounting hole on the bottom for dismounting and mounting the filter assembly 7, the movable disc 811 is fixedly installed with a sealing block one 815 on the top, the sealing block one 815 is installed with a sealing gasket 812 on the top, the gate plate 88 is provided with a sealing surface two 818 on the bottom, the sealing block one 815 extends to the inside of the valve shell 81 through the mounting hole, the sealing gasket 812 is sealed by abutting against the sealing surface two 818, and the movable disc 811 is detachably installed with a sealing block two 816 on the bottom.

[0061] The gate valve assembly 8 in the scheme is mainly used for controlling the communication of the whole pipeline, the output pipeline 1 and the input pipeline 2 are fixed on both sides of the valve shell 81, the water outlet cavity 819 and the water inlet cavity 820 are symmetrically arranged in the inside of the valve shell 81, the water outlet cavity 819 is communicated with the output pipeline 1, the water inlet cavity 820 is communicated with the input pipeline 2, the gate plate 88 is arranged between the water outlet cavity 819 and the water inlet cavity 820, the communication between the water outlet cavity 819 and the water inlet cavity 820 is controlled by the gate plate 88, the sealing ring 89 is fixed on the inner side of the water outlet cavity 819 and the water inlet cavity 820, and the sealing surface one 814 is arranged on both sides of the gate plate 88, when the sealing surface one 814 on the gate plate 88 abuts against the sealing ring 89, the sealing is formed, and the internal passage of the gate plate 88 is cut off.

[0062] The top of the valve shell 81 is fixed with the valve cover 82, which can be connected by bolts, and the top of the valve cover 82 is fixed with the fixing frame 85, and the inner side of the fixing frame 85 is fixed with the threaded sleeve 86. The valve rod 84 is screwed from top to bottom with the threaded sleeve 86, and penetrates the valve cover 82, and the bottom end is rotatably connected with the gate plate 88. The top of the mounting bracket 74 is fixed with the rotating wheel 87. By rotating the rotating wheel 87, the valve rod 84 drives the gate plate 88 to move up and down to control opening and closing. The limit ring 83 is fixed inside the valve shell 81 near the upper position, mainly to limit the travel of the gate plate 88.

[0063] The bottom of the valve shell 81 is provided with a mounting hole, and the bottom of the valve shell 81, that is, the surrounding of the mounting hole is fixed with the connecting disc 810. The movable disc 811 is matched with the connecting disc 810 and can be connected by bolts. The top of the movable disc 811 is fixed with the sealing block one 815, and the top of the sealing block one 815 is installed with the sealing gasket 812. A circle of the bottom of the gate plate 88 is provided with a sealing surface two 818. When the gate plate 88 is closed, the sealing surface two 818 abuts against the sealing gasket 812, which can increase the sealing performance.

[0064] At the same time, the inside of the sealing block one 815 and the movable disc 811 is hollow. The bottom of the movable disc 811 is fixed with the sealing block two 816 by screws. The sealing block two 816 is mainly used to seal when the filter assembly 7 moves upward with the gate plate 88.

[0065] Optionally, in some embodiments, please refer to Figures 4-10 The filter assembly 7 further comprises a fixed plate 71, a top plate 72, a bottom plate 73 and a threaded rod one 78. The top plate 72 and the bottom plate 73 are fixedly installed on the top and the bottom of the fixed plate 71 respectively. The outer end of the fixed plate 71 is detachably installed with a mounting bracket 74, and the inner side of the mounting bracket 74 is installed with a filter screen 75. A plurality of movable grooves one 715 are formed in the outer end of the top plate 72, and a plurality of movable grooves two 716 are formed in the outer end of the bottom plate 73. The top of the drive rod 76 is located in the movable groove one 715, and the bottom of the drive rod 76 extends to the outside through the movable groove two 716. The threaded rod one 78 is screwed with the drive plate 77, and one end of the threaded rod one 78 is rotatably connected with the inner side of the bottom plate 73. The drive plate 77 drives the drive rod 76 to move through the threaded rod one 78.

[0066] The outer end of the driving block 79 is provided with an inclined surface one 713, the outer end of the passive block 710 is provided with an inclined surface two 714, the inclined surface two 714 and the inclined surface one 713 abut each other, the plurality of passive blocks 710 are respectively connected with the movable groove one 715 and the movable groove two 716 in a sliding manner, the outer side of the inclined surface one 713 is fixedly installed with a sliding block 712, the outer side of the inclined surface two 714 is provided with a sliding groove 711 in a sliding manner, the sliding block 712 and the sliding groove 711 are connected in a sliding manner, a plurality of limiting grooves one 813 are provided in the inner side of the sealing block one 815, a plurality of limiting grooves two 817 are provided in the inner side of the shutter 88, the driving block 79 extrudes the inclined surface two 714 through the inclined surface one 713 to force the passive block 710 to move outward, the passive block 710 moves to the inside of the limiting groove two 817 to move with the shutter 88, and the passive block 710 moves to the inside of the limiting groove one 813 to move with the sealing block one 815.

[0067] The filter assembly 7 in the scheme is sleeved with the shutter 88 and located in the inside of the shutter 88, the top and the bottom of the fixed plate 71 are respectively fixed with the top plate 72 and the bottom plate 73, the lower half of the bottom plate 73 is hollow, and the bottom of the bottom plate 73 abuts against the sealing block two 816, the inner side of the fixed plate 71 is detachably connected with the mounting frame 74, the mounting frame 74 can be fixed on the fixed plate 71 through screws, and the mounting frame 74 is mounted with the filter screen 75 on the inner side, and the filter screen 75 is mainly used for filtering impurities.

[0068] Two movable grooves one 715 are respectively provided on the two sides of the top plate 72, and two movable grooves two 716 are respectively provided on the two sides of the bottom plate 73, the top of the driving rod 76 is located in the inside of the movable groove one 715, the bottom extends into the inside of the movable groove two 716 from top to bottom, and extends into the inside of the hollow part of the bottom plate 73 through the movable groove two 716, the inner sides of the four movable grooves one 715 are connected with the passive blocks 710 in a sliding manner, and the inner sides of the four movable grooves two 716 are also connected with the passive blocks 710 in a sliding manner, two driving blocks 79 are fixed on the outer side of each driving rod 76, the two driving blocks 79 are respectively located in the movable groove one 715 and the movable groove two 716, the inclined surface one 713 is provided on the driving block 79, and the inclined surface two 714 is provided on the passive block 710. It is worth mentioning that the two driving blocks 79 fixed on the driving rod 76 are installed in opposite directions, that is, the inclined surface one 713 on the driving block 79 located at the bottom faces upward, and the inclined surface one 713 on the driving block 79 located at the top faces downward, so that the driving directions of the upper and lower driving blocks 79 are opposite. In the initial state, the passive blocks 710 located in the movable groove one 715 or the movable groove two 716 are in a state of extending outward, so that the positions of the two groups of passive blocks 710 can be switched when the driving rod 76 is driven.

[0069] The inclined surface two 714 on the passive block 710 is provided with a sliding groove 711, and the inclined surface one 713 on the active block 79 is fixed with a sliding block 712, when the inclined surface one 713 and the inclined surface two 714 abut together, the sliding block 712 is in sliding connection with the sliding groove 711, so that the passive block 710 can be stably moved outward when the active block 79 drives the passive block 710.

[0070] The four driving rods 76 extend to the inside of the hollow portion of the bottom plate 73, and are fixedly connected with the driving plate 77. A threaded rod one 78 is threadedly connected at the center of the driving plate 77, and one end of the threaded rod one 78 is rotatably connected with the inside of the bottom plate 73. Two limiting grooves one 813 are provided on both sides in the inside of the sealing block one 815, and two limiting grooves two 817 are engraved on both side walls in the inside of the gate plate 88, and the limiting grooves two 817 and the limiting grooves one 813 are matched with the passive block 710.

[0071] When the passive block 710 below the driving rod 76 protrudes outward and is inserted into the limiting groove one 813 in the sealing block one 815, the passive block 710 above the driving rod 76 is retracted into the movable groove one 715, so that the filter assembly 7 is connected with the sealing block one 815. When the gate plate 88 is moved upward to open, the filter assembly 7 remains in the middle for filtering. After the gate plate 88 is closed, the threaded rod one 78 is rotated to drive the driving plate 77 to move downward with the four driving rods 76. At this time, the passive block 710 below is retracted by the driving of the active block 79, and the passive block 710 above the driving rod 76 is extruded outward by the active block 79 and is inserted into the limiting groove two 817 in the gate plate 88. At this time, the filter assembly 7 is connected with the gate plate 88 and can move upward with the gate plate 88, and is not in filtering work in the inside of the gate plate 88. Therefore, through the cooperation of the plurality of active blocks 79 and the passive blocks 710, the working state of the filter assembly 7 can be quickly switched. Only by removing the sealing block two 816 and rotating the threaded rod one 78, the driving plate 77 can drive the four driving rods 76 to switch. Compared with the traditional filter screen which needs to be removed, the convenience during switching can be increased, and the intermittent filtering can be quickly realized.

[0072] When the filter screen 75 is attached with impurities such as soil which are not easy to wash off, the sealing block two 816 can be removed, the threaded rod one 78 is adjusted, the passive block 710 protrudes outward and is inserted into the limiting groove one 813 in the sealing block one 815, and the sealing block one 815 is kept connected, that is, the above-mentioned filtering state. At this time, the movable disc 811 is removed from the connecting disc 810, and the filter assembly 7 can be completely taken out for cleaning or replacement, so that the convenience during disassembly and maintenance can be improved.

[0073] Optionally, in some embodiments, please refer to Figure 11 and Figure 12The overflow valve assembly 9 comprises a lower valve body 92 and an upper housing 91, the upper housing 91 is fixedly installed on the top of the lower valve body 92, and the upper housing 91 is in communication with the inside of the lower valve body 92, the inside of the lower valve body 92 is provided with a water outlet channel 99 and a water inlet channel 910 respectively, and the two ends of the lower valve body 92 are connected with the connecting pipeline 12 and the return pipeline 6 respectively, the water inlet channel 910 is in communication with the connecting pipeline 12, and the water outlet channel 99 is in communication with the return pipeline 6.

[0074] The overflow valve assembly 9 further comprises a threaded rod two 95 and a valve core 97, the upper housing 91 is fixedly installed on the top of the threaded block 96, the threaded rod two 95 is screwed with the threaded block 96, the bottom end of the threaded rod two 95 extends to the inside through the top of the upper housing 91, the bottom end of the threaded rod two 95 is rotatably connected with the pressing plate 93, the pressing plate 93 is slidably connected with the inner wall of the upper housing 91, the valve core 97 is fixedly connected with the movable plate 98 on the top, and the movable plate 98 and the pressing plate 93 are installed with the extension spring 94, and the valve core 97 is sealed downward at the communication position of the water outlet channel 99 and the water inlet channel 910 by the extension spring 94.

[0075] The overflow valve assembly 9 in the scheme not only plays a role in overflow protection, that is, the effect of bypass valve, but also can perform backwashing cleaning on the filter assembly 7, and the filtered garbage is discharged, the upper housing 91 is fixed on the top of the lower valve body 92, the two ends of the lower valve body 92 are connected with the connecting pipeline 12 and the return pipeline 6 respectively, the water outlet channel 99 and the water inlet channel 910 are respectively arranged in the inside of the lower valve body 92, the water outlet channel 99 is in communication with the return pipeline 6, and the water inlet channel 910 is in communication with the connecting pipeline 12, the threaded block 96 is fixed on the top of the upper housing 91, the threaded rod two 95 is screwed with the threaded block 96, the bottom end of the threaded rod two 95 extends to the inside through the upper housing 91 and is rotatably connected with the pressing plate 93, the pressing plate 93 can slide up and down on the inner wall of the upper housing 91 by the driving of the threaded rod two 95, and the valve core 97 is arranged at the communication position of the water outlet channel 99 and the water inlet channel 910, the top of the valve core 97 is fixedly connected with the movable plate 98, the movable plate 98 is also slidably connected with the inner wall of the upper housing 91, and the extension spring 94 is installed between the movable plate 98 and the pressing plate 93, the valve core 97 can be pushed downward by the action force of the extension spring 94, so that the valve core 97 is sealed at the communication position of the water outlet channel 99 and the water inlet channel 910.

[0076] When the inside of the gate valve assembly 8 is unobstructed, the water flow can pass through the gate valve assembly 8 by the force of the telescopic spring 94 acting against the valve core 97. When the filter assembly 7 is clogged, the pressure inside the pipeline will increase. When the pressure exceeds the force of the telescopic spring 94, the valve core 97 will be pushed upward, causing the water outlet channel 99 to communicate with the water inlet channel 910. The water flow bypasses the gate valve assembly 8 through the connecting pipeline 12 and the return pipeline 6, preventing the pipeline from being damaged due to excessive pressure when it is clogged. The threshold at which the valve core 97 opens can be set by rotating the threaded rod 95 and adjusting the compression of the telescopic spring 94 by the compression plate 93.

[0077] It is worth mentioning that due to the presence of the overflow valve assembly 9, when it is necessary to close the entire pipeline, both the two shut-off devices 13 and the gate valve assembly 8 need to be closed simultaneously, so that the pipeline can be completely closed.

[0078] In addition to the safety protection function, the overflow valve assembly 9 can also perform backwashing. When backwashing is needed to clean the filter assembly 7 and discharge the filtered waste, the two shut-off devices 13 are first closed. At this time, the compression plate 93 is moved to the top of the upper housing 91, the threshold at which the valve core 97 opens is minimized, and it can be easily opened. Then, the filter assembly 7 needs to be switched to the filtering state, and the sealing disc 11 on the blowdown pipeline 10 is opened. At this time, the water flow entering from the water inlet pipe 5 is blocked by the shut-off device 13 and flows into the connecting pipeline 12, opening the overflow valve assembly 9 and making it pass through the return pipeline 6 into the output pipeline 1. Since the other shut-off device 13 is also closed, the water flow will flow in the opposite direction, from the output pipeline 1 through the gate valve assembly 8 and the filter assembly 7 into the input pipeline 2, backwashing the filter assembly 7 in the opposite direction and cleaning the dirt attached to it. At the same time, the accumulated waste in the input pipeline 2 is also flushed into the blowdown pipeline 10 and discharged, thereby achieving the effect of backwashing and improving the convenience of cleaning and maintaining the filter assembly 7. Therefore, the overflow valve assembly 9 not only has the function of safety redundancy, but also improves the convenience of cleaning the filter assembly 7.

[0079] Working principle: The filter assembly 7 in this scheme has three working modes:

[0080] When filtering, the lower passive block 710 of the drive rod 76 protrudes into the limiting groove 813 of the sealing block 815. At this time, the upper passive block 710 of the drive rod 76 is retracted into the active groove 715, causing the filter assembly 7 to connect with the sealing block 815. When the gate plate 88 moves upward to open, the filter assembly 7 will perform filtering in the middle.

[0081] When not filtering, rotate the threaded rod 78 to make the driving plate 77 drive the four driving rods 76 to move downward. At this time, the lower passive blocks 710 will be retracted by the driving of the active block 79, and the passive blocks 710 above the driving rods 76 will be extruded by the active block 79 to move outward and insert into the limiting slot two 817 in the gate plate 88. The filtering assembly 7 can move upward with the gate plate 88 to not perform filtering work.

[0082] When disassembled, the filtering assembly 7 remains in the filtering state. At this time, the movable disc 811 is disassembled from the connecting disc 810, and the filtering assembly 7 is taken out together with the movable disc 811 and the sealing block one 815.

[0083] The overflow valve assembly 9 in the scheme has two working modes:

[0084] When performing overflow safety protection, the valve core 97 is pushed downward by the force of the extension spring 94 to form a seal at the connection between the water outlet channel 99 and the water inlet channel 910. When the pressure inside the pipeline is increased due to the blocking of the filtering assembly 7, the valve core 97 will be pushed upward when the pressure exceeds the force of the extension spring 94, so that the water outlet channel 99 and the water inlet channel 910 are connected, and the water flows through the connecting pipeline 12 and the return pipeline 6 to bypass the gate valve assembly 8 and flow out;

[0085] When backwashing, the two cut-off devices 13 are closed, the threshold value of the valve core 97 is minimized by moving the pressing plate 93, and then the filtering assembly 7 is switched to the filtering state. The water flow is blocked by the cut-off device 13 and flows into the connecting pipeline 12 to open the overflow valve assembly 9, so that it enters the output pipeline 1 through the return pipeline 6. At this time, the water flow flows into the input pipeline 2 from the output pipeline 1 through the gate valve assembly 8 and the filtering assembly 7, which performs reverse flushing of the filtering assembly 7. At the same time, the garbage accumulated in the input pipeline 2 will also be flushed into the sewage pipeline 10 and discharged.

Claims

1. A gate valve having a filtering function, characterized by: The utility model provides a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, wherein drive rod outer end fixed mounting two active blocks are opposite, drive rod moves through drive plate and active block, active block moves through extrusion and drives passive block, active block and passive block moving direction are perpendicular to each other, the utility model discloses a filter assembly, backflow pipe and connecting pipe are provided with overflow valve assembly between backflow pipe and connecting pipe, filter assembly includes drive plate, a plurality of passive blocks and a plurality of drive rods, a plurality of drive rods one end are fixedly connected with drive plate outer end, drive rod outer end fixed mounting has two active blocks, passive block is adapted with active block, ​ ​ ​ ​ ​ ​ ​ ​ 2. The gate valve with filtering function according to claim 1, characterized in that: ​ 3. The gate valve with filtering function according to claim 2, characterized in that: The input pipe outer end is fixedly connected with a blowdown pipe, the blowdown pipe is communicated with the inside of the input pipe, the blowdown pipe outer end is detachably installed with a sealing disc, the reflux pipe one end is fixedly connected with the output pipe outer end, and the reflux pipe is communicated with the output pipe inside, the connecting pipe one end is fixedly connected with the water inlet pipe outer end, and the connecting pipe is communicated with the water inlet pipe inside.

4. The gate valve with filtering function according to claim 1, characterized in that: The output pipe and input pipe are fixedly installed on both sides of the valve shell respectively, the valve shell inside is respectively provided with a water outlet cavity and a water inlet cavity, the water outlet cavity is communicated with the output pipe, the water inlet cavity is communicated with the input pipe, the water outlet cavity and the water inlet cavity inside are fixedly installed with a sealing ring respectively, the gate plate is located between the water outlet cavity and the water inlet cavity, the gate plate both sides are provided with a sealing surface one, the gate plate is sealed by the sealing surface one and the sealing ring, the gate plate inside is hollow, and the gate plate is sleeved outside the filter assembly.

5. The gate valve with filtering function according to claim 4, characterized in that: The gate valve assembly further comprises a valve cover and a valve rod, the valve shell inside is fixedly installed with a limiting ring, the valve cover is fixedly installed on the valve shell top, the valve cover top is fixedly installed with a fixed frame, the fixed frame inside is fixedly installed with a threaded sleeve, the valve rod is screwed with the threaded sleeve, and the valve rod bottom extends to the valve shell inside through the valve cover, the valve rod bottom end is rotationally connected with the gate plate, and the valve rod top is fixedly installed with a rotating wheel.

6. A gate valve with filtering function according to claim 5, characterized in that: The sealing block one top is installed with a sealing gasket, the gate plate bottom is provided with a sealing surface two, the sealing block one extends to the valve shell inside through the mounting port, the sealing gasket is sealed by the sealing surface two, and the movable disc bottom is detachably installed with a sealing block two.

7. The gate valve with filtering function according to claim 1, characterized in that: The overflow valve assembly comprises a lower valve body and an upper shell, the upper shell is fixedly installed on the lower valve body top, and the upper shell is communicated with the lower valve body inside, the lower valve body inside is respectively provided with a water outlet channel and a water inlet channel, the lower valve body both ends are respectively connected with the connecting pipe and the reflux pipe, the water inlet channel is communicated with the connecting pipe, and the water outlet channel is communicated with the reflux pipe.

8. The gate valve with filtering function according to claim 7, characterized in that: The overflow valve assembly further comprises a threaded rod two and a valve core, the upper shell top is fixedly installed with a threaded block, the threaded rod two is screwed with the threaded block, the threaded rod two bottom end extends to the inside through the upper shell top, the threaded rod two bottom end is rotationally connected with a pressing plate, the pressing plate is slidingly connected with the upper shell inner wall, the valve core top is fixedly connected with a movable plate, a telescopic spring is installed between the movable plate and the pressing plate, and the valve core is sealed by the telescopic spring force downward at the water outlet channel and water inlet channel communication place.

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