Gate valve with filtering function

Abstract

The invention 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 located in the gate valve assembly and used for filtering, and an overflow valve assembly is arranged between a backflow pipeline and a connecting pipeline; a filtering assembly is arranged in the gate plate, when a driven block in a second movable groove in a bottom plate moves outwards to be inserted into a first limiting groove in a first sealing block, the filtering assembly can be connected with the first sealing block, at the moment, a driven block in a first movable groove can retract, and therefore when the gate plate ascends to open the gate, the filtering assembly can be connected with the first sealing block; when a driven block in a first movable groove in a top plate moves outwards and is inserted into a second limiting groove in the inner side of a gate plate, the filtering assembly moves upwards along with the gate plate, the filtering assembly does not conduct filtering, and therefore filtering can be switched conveniently and rapidly.

Description

Technical Field

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

[0002] A gate valve is a common shutoff valve, primarily used to shut off or connect fluids (such as liquids and gases) in pipeline systems, rather than to regulate flow. Its core feature is the up-and-down movement of a "gate" perpendicular to the flow of fluid. The gate, a wedge-shaped or parallel plate structure, is driven up and down by the valve stem. When fully raised, the valve is fully open, allowing fluid to flow through with almost no resistance. When fully lowered, the gate presses against the sealing surface, shutting off the flow.

[0003] The Chinese patent announcement number CN219712470U discloses an electrically driven filter gate valve, in which a fixed plate and a rotating plate are installed on the water inlet pipe of the gate valve, and filter plates are provided on both the fixed plate and the rotating plate. The rotating plate can rotate relative to the fixed plate, so that the filter holes of the fixed plate and the rotating plate are misaligned, thereby achieving the purpose of adjusting the aperture of the filter hole, and the filter hole will not be too large or too small, thereby increasing the practicality of the gate valve to adapt to media of different densities for use. The fixed plate and the rotating plate are installed on the water inlet pipe by fastening bolts, and a guide hole is provided on the rotating plate. The guide hole facilitates the rotation of the rotating plate relative to the fixed plate to avoid interference between the rotating plate and the fastening bolts.

[0004] In agricultural irrigation, river water and reservoir water are often used for irrigation. However, during rainstorms and floods, they carry a large amount of sediment, algae or suspended matter, which needs to be filtered. However, the water quality is usually good and does not need to be filtered. If it is filtered for a long time, the filter will be frequently blocked, increasing maintenance costs. When the filtering gate valve in the above solution or the prior art switches whether to filter, the gate valve pipeline system needs to be dismantled and replaced, which causes inconvenience in switching the filter.

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

[0006] The present invention provides a gate valve with a filtering function, which can improve the problem in the related art that when switching whether to filter, the gate valve pipeline system needs to be dismantled and replaced, thereby causing inconvenience in filtering switching.

[0007] An embodiment of the present application provides a gate valve with a filtering function, comprising: an output pipe, an input pipe, a filtering assembly, a return pipe and a connecting pipe, a gate valve assembly is arranged between the output pipe and the input pipe, the filtering assembly is located inside the gate valve assembly for filtering, an overflow valve assembly is arranged between the return pipe and the connecting pipe, 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 to the outer end of the driving plate, two active blocks are fixedly installed on the outer end of the driving rod, the passive block is adapted to the active block, the two active blocks fixedly installed on the outer end of the driving rod face opposite directions, the driving rod drives the active block to move through the driving plate, the active block drives the passive block to move by extrusion, and the moving directions of the active block and the passive block are perpendicular to each other.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects: (1) The interior of the gate is hollow, and a filter assembly is arranged inside the gate. When the passive block inside the movable groove 2 on the bottom plate is moved outward and inserted into the limiting groove 1 on the sealing block 1, the filter assembly will be connected with the sealing block 1. At this time, the passive block in the movable groove 1 will retract, so that when the gate is raised to open, the filter assembly will filter in the middle. When the passive block inside the movable groove 1 on the top plate moves outward and inserts into the limiting groove 2 on the inner side of the gate, the filter assembly will move upward with the gate, so that the filter assembly will not filter, thereby conveniently switching the filter.

[0009] (2) An overflow valve assembly is installed at the outer end of the water inlet pipe through a connecting pipe. When the filter assembly is blocked, the pressure in the pipe will increase. At this time, the excessive pressure will flush the valve core in the overflow valve assembly, allowing water to flow through the return pipe and bypass the gate valve assembly, thereby preventing the pipe from being damaged due to excessive pressure.

[0010] (3) When the pressure plate in the overflow valve assembly is moved to the top of the upper shell, the downward pressure on the valve core can be reduced. At this time, the intercepting devices on the two middle pipes are closed, and the sealing disk is removed. The water flows through the water inlet pipe, connecting pipe, return pipe and output pipe in turn, and then flushes the filter assembly in the reverse direction, so that the filtered garbage is discharged through the sewage pipe, thereby achieving the effect of backwashing and cleaning, which is convenient for sewage maintenance.

[0011] In some embodiments, a middle section pipe is fixedly installed at one end of the output pipe and the input pipe, and an outlet pipe and an inlet pipe are fixedly installed at the other end of the two middle section pipes respectively. A cut-off device for intercepting flow is installed inside the two middle section pipes, one of the cut-off devices is used to control the connection between the output pipe and the outlet pipe, and the other cut-off device is used to control the connection between the input pipe and the inlet pipe.

[0012] In some embodiments, the outer end of the input pipe is fixedly connected to a sewage pipe, the sewage pipe is connected to the interior of the input pipe, the outer end of the sewage pipe is detachably installed with a sealing disk, one end of the return pipe is fixedly connected to the outer end of the output pipe, and the return pipe is connected to the interior of the output pipe, one end of the connecting pipe is fixedly connected to the outer end of the water inlet pipe, and the connecting pipe is connected to the interior of the water inlet pipe.

[0013] In some embodiments, the gate valve assembly includes a valve housing and a gate plate, the output pipe and the input pipe are respectively fixedly installed on both sides of the valve housing, and a water outlet chamber and a water inlet chamber are respectively opened inside the valve housing, the water outlet chamber is connected with the output pipe, and the water inlet chamber is connected with the input pipe, and sealing rings are fixedly installed on the inner sides of the water outlet chamber and the water inlet chamber, and the gate plate is located between the water outlet chamber and the water inlet chamber. A sealing surface 1 is provided on both sides of the gate plate, and the gate plate is sealed against the sealing ring through the sealing surface 1. The interior of the gate plate is hollow, and the gate plate is sleeved on the outside of the filter assembly.

[0014] In some embodiments, the gate valve assembly further includes a valve cover and a valve stem, a limiting ring is fixedly mounted on the inner side of the valve housing, the valve cover is fixedly mounted on the top of the valve housing, a fixing frame is fixedly mounted on the top of the valve cover, a threaded sleeve is fixedly mounted on the inner side of the fixing frame, the valve stem is threadedly connected to the threaded sleeve, and the bottom of the valve stem extends through the valve cover to the inside of the valve housing, the bottom end of the valve stem is rotatably connected to the gate plate, and a runner is fixedly mounted on the top of the valve stem.

[0015] In some embodiments, the gate valve assembly also includes a movable disk, a connecting disk is fixedly installed on the bottom of the valve housing, the connecting disk is detachably connected to the movable disk, and an installation port is provided at the bottom of the valve housing to disassemble and install the filter assembly, a sealing block 1 is fixedly installed on the top of the movable disk, a sealing gasket is installed on the top of the sealing block 1, a sealing surface 2 is provided at the bottom of the gate plate, the sealing block 1 extends to the interior of the valve housing through the installation port, the sealing gasket and the sealing surface 2 are abutted against each other to form a seal, and a sealing block 2 is detachably installed on the bottom of the movable disk.

[0016] In some embodiments, the filter assembly further includes a fixed plate, a top plate, a bottom plate and a threaded rod 1, the top plate and the bottom plate are respectively fixedly mounted on the top and bottom of the fixed plate, the outer end of the fixed plate is detachably mounted with a mounting bracket, a filter screen is mounted on the inner side of the mounting bracket, a plurality of movable grooves 1 are opened at the outer end of the top plate, a plurality of movable grooves 2 are opened at the outer end of the bottom plate, the top of the drive rod is located inside the movable groove 1, the bottom of the drive rod passes through the movable groove 2 and extends to the outside, the threaded rod 1 is threadedly connected to the drive plate, one end of the threaded rod 1 is rotatably connected to the inner side of the bottom plate, and the drive plate drives the drive rod to move by being driven by the threaded rod 1.

[0017] In some embodiments, the outer end of the active block is provided with a slope 1, and the outer end of the passive block is provided with a slope 2, the slope 2 and the slope 1 abut against each other, and the multiple passive blocks are respectively slidably connected with the movable groove 1 and the movable groove 2, a slider is fixedly installed on the outside of the slope 1, and a slide groove is provided on the outside of the slope 2, and the slider is slidably connected with the slide groove, the inner side of the sealing block 1 is provided with multiple limit grooves 1, and the inside of the gate plate is provided with multiple limit grooves 2, the active block squeezes the slope 2 through the slope 1 to force the passive block to move outward, and when the passive block moves to the inside of the limit groove 2, it follows the movement of the gate plate, and when the passive block moves to the inside of the limit groove 1, it follows the movement of the sealing block 1.

[0018] In some embodiments, the overflow valve assembly includes a lower valve body and an upper shell, the upper shell is fixedly mounted on the top of the lower valve body, and the upper shell is connected to the interior of the lower valve body, the interior 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 to the connecting pipe and the return pipe, the water inlet channel is connected to the connecting pipe, and the water outlet channel is connected to the return pipe.

[0019] In some embodiments, the overflow valve assembly also includes a second threaded rod and a valve core, a threaded block is fixedly installed on the top of the upper shell, the second threaded rod is threadedly connected to the threaded block, the bottom end of the second threaded rod passes through the top of the upper shell and extends to the interior, the bottom end of the second threaded rod is rotatably connected to a pressure plate, the pressure plate is slidingly connected to the inner wall of the upper shell, a movable plate is fixedly connected to the top of the valve core, a telescopic spring is installed between the movable plate and the pressure plate, and the valve core is pressed downward by the force of the telescopic spring to form a seal at the connection between the water outlet channel and the water inlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present application; Figure 2 A schematic diagram of a partially enlarged structure provided in an embodiment of the present application; Figure 3 A schematic cross-sectional view of a gate valve assembly according to an embodiment of the present application; Figure 4 This is a schematic diagram of the enlarged structure of the gate valve assembly provided in an embodiment of the present application; Figure 5 A schematic diagram of a partially exploded structure of a gate valve assembly provided in an embodiment of the present application; Figure 6 A schematic diagram of a cross-sectional structure of a gate provided in an embodiment of the present application; Figure 7 A schematic diagram of the filter assembly structure provided in an embodiment of the present application; Figure 8 A schematic cross-sectional view of the filter assembly provided in an embodiment of the present application; Figure 9 A schematic diagram of the partial structure of the filter assembly provided in an embodiment of the present application; Figure 10 A schematic diagram of the active block and passive block structures provided in an embodiment of the present application; Figure 11 A schematic cross-sectional view of a relief valve assembly according to an embodiment of the present application; Figure 12 A schematic diagram of the partial structure of the overflow valve assembly provided in an embodiment of the present application.

[0022] Description of the numbers in the figure: 1. Output pipeline; 2. Input pipeline; 3. Middle section pipeline; 4. Water outlet pipe; 5. Water inlet pipe; 6. Return pipe; 7. Filter assembly; 71. Fixed plate; 72. Top plate; 73. Bottom plate; 74. Mounting bracket; 75. Filter screen; 76. Drive rod; 77. Drive plate; 78. Threaded rod 1; 79. Active block; 710. Passive block; 711. Slide; 712. Slider; 713. Inclined surface 1; 714. Inclined surface 2; 715. Movable groove 1; 716. Movable groove 2; 8. Gate valve assembly; 81. Valve housing; 82. Valve cover; 83. Limiting ring; 84. Valve stem; 85. Fixing bracket; 86. Threaded sleeve; 87. Rotor; 88. Gate; 89. Sealing ring; 810. Connecting plate; 811. Movable plate; 812. Sealing gasket; 813. Limiting groove 1; 814. Sealing surface 1; 815. Sealing block 1; 816. Sealing block 2; 817. Limiting groove 2; 818. Sealing surface 2; 819. Water outlet chamber; 820. Water inlet chamber; 9. Overflow valve assembly; 91. Upper housing; 92. Lower valve body; 93. Pressure plate; 94. Telescopic spring; 95. Second threaded rod; 96. Threaded block; 97. Valve core; 98. Movable plate; 99. Water outlet channel; 910. Water inlet channel; 10. Sewage pipes; 11. Sealing plate; 12. Connect the pipes; 13. Shut-off device. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is 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 this application and are not intended to limit this application.

[0024] See also Figures 1-12 , a gate valve with a filtering function, comprising: an output pipe 1, an input pipe 2, a filter assembly 7, a return pipe 6 and a connecting pipe 12, a gate valve assembly 8 is arranged between the output pipe 1 and the input pipe 2, the filter assembly 7 is located inside the gate valve assembly 8 for filtering, and an overflow valve assembly 9 is arranged between the return pipe 6 and the connecting pipe 12, the filter assembly 7 comprises a driving plate 77, a plurality of passive blocks 710 and a plurality of driving rods 76, one end of the plurality of driving rods 76 are fixedly connected to the outer end of the driving plate 77, two active blocks 79 are fixedly installed on the outer end of the driving rod 76, the passive block 710 is adapted to the active block 79, the two active blocks 79 fixed on the outer end of the driving rod 76 face oppositely, the driving rod 76 drives the active block 79 to move through the driving plate 77, the active block 79 drives the passive block 710 to move by extrusion, and the moving directions of the active block 79 and the passive block 710 are perpendicular to each other.

[0025] In natural water bodies such as rivers, reservoirs, lakes or some industrial circulating water systems, water quality may undergo short-term drastic changes due to climate, environment or operating conditions, resulting in a surge in the concentration of suspended matter, algae, silt or other impurities in the water. For example, during heavy rain or flood periods, surface runoff washes the soil, carrying large amounts of silt and humus into the water intake. If continuous filtration is used, the filter will frequently become clogged due to long-term interception of low-concentration impurities, increasing the cleaning frequency and energy consumption. Intermittent filtration can be quickly activated when water quality deteriorates and maintain low flow resistance operation during normal periods. The device in this solution is mainly used as a valve to control intermittent filtration in agricultural irrigation.

[0026] The gate valve assembly 8 in this scheme is installed with output pipe 1 and input pipe 2 on both sides, and the filter assembly 7 for filtering is installed inside the gate valve assembly 8. The interior 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 2 716 on the bottom plate 73 is moved outward and inserted into the limiting groove 1 813 on the sealing block 1 815, the filter assembly 7 will be connected with the sealing block 1 815. At this time, the passive block 710 in the movable groove 1 715 will retract, so that when the gate plate 88 rises to open the gate, the filter assembly 7 will filter in the middle. When the passive block 710 inside the movable groove 1 715 on the top plate 72 moves outward and inserts into the limiting groove 2 817 on the inner side of the gate plate 88, the filter assembly 7 will move upward with the gate plate 88, so that the filter assembly 7 will not filter, thereby conveniently switching the filter.

[0027] The two sides of the overflow valve assembly 9 are connected to the connecting pipe 12 and the return pipe 6. The overflow valve assembly 9 is mainly used to play the role of safe overflow, and can also backwash the filter assembly 7.

[0028] Optionally, in some embodiments, see Figure 1 and Figure 2 The output pipe 1 and the input pipe 2 are both fixedly installed with a middle pipe 3 at one end, and the other ends of the two middle pipes 3 are respectively fixedly installed with an outlet pipe 4 and an inlet pipe 5. The two middle pipes 3 are both installed with a shut-off device 13 for intercepting flow, one of the shut-off devices 13 is used to control the communication between the output pipe 1 and the outlet pipe 4, and the other shut-off device 13 is used to control the communication between the input pipe 2 and the inlet pipe 5.

[0029] The outer end of the input pipe 2 is fixedly connected to a sewage pipe 10, which is connected to the interior of the input pipe 2. A sealing disk 11 is detachably installed on the outer end of the sewage pipe 10. One end of the return pipe 6 is fixedly connected to the outer end of the output pipe 1, and the return pipe 6 is connected to the interior of the output pipe 1. One end of the connecting pipe 12 is fixedly connected to the outer end of the water inlet pipe 5, and the connecting pipe 12 is connected to the interior of the water inlet pipe 5.

[0030] In this solution, the output pipe 1 is connected to the middle pipe 3 through a flange at one end away from the gate valve assembly 8, and the other end of the middle pipe 3 is connected to the outlet pipe 4 through a flange. One end of the input pipe 2 is also connected to the middle pipe 3 through a flange, and the other end of the middle pipe 3 is connected to the inlet pipe 5 through a flange. The inlet pipe 5 and the outlet pipe 4 are connected to the external pipe system through flanges. A shut-off device 13 is installed inside the two middle pipes 3. The shut-off device 13 is a butterfly valve, which is a valve that controls the flow of fluid or adjusts the flow by rotating the valve plate. It only needs to rotate 90° to complete the switch. The operation is fast. The flow channel is unobstructed when fully open, which is suitable for large flow applications. The shut-off device 13 is mainly used to block the two middle pipes 3 during backwashing to prevent water from flowing.

[0031] A sewage pipe 10 is fixed at the outer end of the input pipe 2, and the sewage pipe 10 is connected to the inside of the input pipe 2. At the same time, a sealing disk 11 is fixed to the outer end of the sewage pipe 10 by bolts. The sealing disk 11 mainly serves to close the sewage pipe 10, and the sewage pipe 10 mainly serves to discharge garbage during backwashing.

[0032] A connecting pipe 12 is fixed to the outer end of the water inlet pipe 5, and a return pipe 6 is fixed to the outer end of the output pipe 1. The overflow valve assembly 9 is installed between the connecting pipe 12 and the return pipe 6. When the filter assembly 7 is blocked, the pressure in the pipe will increase. At this time, the excessive pressure will open the valve core 97 in the overflow valve assembly 9, allowing water to flow through the return pipe 6 and bypass the gate valve assembly 8, thereby preventing the pipe from being damaged due to excessive pressure.

[0033] Optionally, in some embodiments, see Figures 1-6 The gate valve assembly 8 includes a valve housing 81 and a gate plate 88. The output pipe 1 and the input pipe 2 are respectively fixedly installed on both sides of the valve housing 81. A water outlet chamber 819 and a water inlet chamber 820 are respectively opened inside the valve housing 81. The water outlet chamber 819 is connected to the output pipe 1, and the water inlet chamber 820 is connected to the input pipe 2. A sealing ring 89 is fixedly installed on the inside of the water outlet chamber 819 and the water inlet chamber 820. The gate plate 88 is located between the water outlet chamber 819 and the water inlet chamber 820. A sealing surface 814 is provided on both sides of the gate plate 88. The gate plate 88 is sealed by abutting against the sealing ring 89 through the sealing surface 814. The interior of the gate plate 88 is hollow, and the gate plate 88 is sleeved on the outside of the filter assembly 7.

[0034] The gate valve assembly 8 also includes a valve cover 82 and a valve stem 84. A limit ring 83 is fixedly installed on the inside of the valve housing 81. The valve cover 82 is fixedly installed on the top of the valve housing 81. A fixing frame 85 is fixedly installed on the top of the valve cover 82. A threaded sleeve 86 is fixedly installed on the inside of the fixing frame 85. The valve stem 84 is threadedly connected to the threaded sleeve 86, and the bottom of the valve stem 84 passes through the valve cover 82 and extends to the inside of the valve housing 81. The bottom end of the valve stem 84 is rotatably connected to the gate plate 88, and a runner 87 is fixedly installed on the top of the valve stem 84.

[0035] The gate valve assembly 8 also includes a movable disk 811. A connecting disk 810 is fixedly installed at the bottom of the valve housing 81. The connecting disk 810 is detachably connected to the movable disk 811. A mounting port is provided at the bottom of the valve housing 81 to disassemble and install the filter assembly 7. A sealing block 815 is fixedly installed on the top of the movable disk 811. A sealing gasket 812 is installed on the top of the sealing block 815. A sealing surface 818 is provided at the bottom of the gate plate 88. The sealing block 815 extends to the interior of the valve housing 81 through the mounting port. The sealing gasket 812 abuts against the sealing surface 818 to form a seal. A sealing block 816 is detachably installed at the bottom of the movable disk 811.

[0036] The gate valve assembly 8 in this scheme is mainly used to control the connectivity of the entire pipeline. The output pipeline 1 and the input pipeline 2 are fixed on both sides of the valve housing 81. A symmetrical water outlet chamber 819 and a water inlet chamber 820 are arranged inside the valve housing 81. The water outlet chamber 819 is connected to the output pipeline 1, and the water inlet chamber 820 is connected to the input pipeline 2. A gate plate 88 is arranged in the middle of the water outlet chamber 819 and the water inlet chamber 820, that is, the connection point. The gate plate 88 is used to control whether the water outlet chamber 819 and the water inlet chamber 820 are connected. A sealing ring 89 is fixed on the inner side of the water outlet chamber 819 and the water inlet chamber 820, and a sealing surface 814 is arranged on both sides of the gate plate 88. When the sealing surface 814 on the gate plate 88 is against the sealing ring 89, a seal can be formed, so that the gate plate 88 can cut off the internal channel.

[0037] The valve cover 82 is fixed on the top of the valve housing 81 and can be connected by bolts. The top of the valve cover 82 is fixed with a fixing frame 85, and the inner side of the fixing frame 85 is fixed with a threaded sleeve 86. The valve stem 84 is threadedly connected with the threaded sleeve 86 from top to bottom and passes through the valve cover 82. The bottom end is rotatably connected to the gate 88. The top of the mounting frame 74 is fixed with a runner 87. By rotating the runner 87, the valve stem 84 can drive the gate 88 to move up and down to control opening and closing. A limit ring 83 is fixed near the upper position inside the valve housing 81, which mainly serves to limit the stroke of the gate 88.

[0038] An installation port is provided at the bottom of the valve housing 81. A connecting plate 810 is fixed at the bottom of the valve housing 81, that is, around the installation port. A movable plate 811 matches the connecting plate 810 and can be connected by bolts. A sealing block 1 815 is fixed on the top of the movable plate 811, and a sealing gasket 812 is installed on the top of the sealing block 1 815. A sealing surface 2 818 is provided around the bottom of the gate plate 88. When the gate plate 88 is closed, the sealing surface 2 818 abuts against the sealing gasket 812, thereby increasing the sealing performance.

[0039] At the same time, the interior of sealing block 1 815 and movable disk 811 is hollow, and sealing block 2 816 is fixed to the bottom of movable disk 811 by screws. Sealing block 2 816 is mainly used to seal when the filter assembly 7 moves upward following the gate plate 88.

[0040] Optionally, in some embodiments, see Figure 4-10 The filter assembly 7 also includes a fixed plate 71, a top plate 72, a bottom plate 73 and a threaded rod 78. The top plate 72 and the bottom plate 73 are fixedly mounted on the top and bottom of the fixed plate 71 respectively. The outer end of the fixed plate 71 is detachably mounted with a mounting bracket 74, and a filter screen 75 is mounted on the inner side of the mounting bracket 74. The outer end of the top plate 72 is provided with a plurality of movable grooves 1 715, and the outer end of the bottom plate 73 is provided with a plurality of movable grooves 2 716. The top of the drive rod 76 is located inside the movable groove 1 715, and the bottom of the drive rod 76 extends to the outside through the movable groove 2 716. The threaded rod 1 78 is threadedly connected to the drive plate 77, and one end of the threaded rod 1 78 is rotatably connected to the inner side of the bottom plate 73. The drive plate 77 is driven by the threaded rod 1 78 to drive the drive rod 76 to move.

[0041] The outer end of the active block 79 is provided with a slope 1 713, and the outer end of the passive block 710 is provided with a slope 2 714. The slope 2 714 and the slope 1 713 abut against each other. Multiple passive blocks 710 are respectively slidably connected with the movable groove 1 715 and the movable groove 2 716. A slider 712 is fixedly installed on the outside of the slope 1 713, and a slide groove 711 is provided on the outside of the slope 2 714. The slider 712 is slidably connected with the slide groove 711. A plurality of limiting grooves 1 813 are provided on the inner side of the sealing block 1 815, and a plurality of limiting grooves 2 817 are provided inside the gate plate 88. The active block 79 squeezes the inclined surface 2 714 through the slope 1 713 to force the passive block 710 to move outward. When the passive block 710 moves to the inside of the limiting groove 2 817, it follows the gate plate 88 to move. When the passive block 710 moves to the inside of the limiting groove 1 813, it follows the sealing block 1 815 to move.

[0042] The filter assembly 7 in this solution is sleeved by the gate plate 88 and is located inside the gate plate 88. The top plate 72 and the bottom plate 73 are fixed on the top and bottom of the fixed plate 71 respectively, wherein the lower half of the bottom plate 73 is hollow, and the bottom of the bottom plate 73 is against the sealing block 2 816. The mounting bracket 74 is detachably connected to the inner side of the fixed plate 71, and the mounting bracket 74 can be fixed to the fixed plate 71 by screws. The filter screen 75 is installed on the inner side of the mounting bracket 74, and the filter screen 75 is mainly used to filter impurities.

[0043] Two movable grooves 1 715 are respectively provided on both sides of the top plate 72, and two movable grooves 2 716 are respectively provided on both sides of the bottom plate 73. At this time, the top of the driving rod 76 is located inside the movable groove 1 715, and the bottom extends from top to bottom to the inside of the movable groove 2 716, and penetrates the movable groove 2 716 to the inside of the hollow part of the bottom plate 73. The inner sides of the four movable grooves 1 715 are slidably connected to the passive blocks 710, and the inner sides of the four movable grooves 2 716 are also slidably connected to the passive blocks 710. Two active blocks 79 are fixed on the outside of each driving rod 76. These two active blocks 79 are respectively located in the movable groove 1 715 and the movable groove 2 716. The active block 79 is provided with an inclined surface 1 713, and the passive block 710 is provided with an inclined surface 2 714. It is worth mentioning that the two active blocks 79 fixed to the driving rod 76 are installed in opposite directions, that is, the inclined surface 1 713 on the active block 79 located at the bottom faces upward, while the inclined surface 1 713 on the active block 79 located at the top faces downward. This arrangement is to ensure that the driving directions of the upper and lower active blocks 79 are opposite. In the initial state, one group of passive blocks 710 located in the active groove 1 715 or the active groove 2 716 is in an outwardly extended position, so that the positions of the two groups of passive blocks 710 can be switched when the driving rod 76 is driven.

[0044] A chute 711 is provided on the second inclined surface 714 on the passive block 710, and a slider 712 is fixed on the first inclined surface 713 on the active block 79. When the first inclined surface 713 and the second inclined surface 714 are in contact with each other, the slider 712 and the chute 711 are slidably connected, so that the passive block 710 can be stably moved outward when the active block 79 drives the passive block 710.

[0045] The bottoms of the four driving rods 76 extend to the inner side of the hollow part of the base plate 73 and are fixedly connected to the driving plate 77. A threaded rod 78 is threadedly connected to the center of the driving plate 77, and one end of the threaded rod 78 is rotatably connected to the inner side of the base plate 73. Two limiting grooves 813 are provided on both sides of the interior of the sealing block 815, and two limiting grooves 817 are engraved on the inner side walls of the gate plate 88. The limiting grooves 817 and 813 are matched with the passive block 710.

[0046] When the passive block 710 located below the driving rod 76 protrudes outward and is inserted into the limiting groove 813 in the sealing block 815, the passive block 710 above the driving rod 76 is retracted inside the movable groove 715, so that the filter assembly 7 is connected to the sealing block 815. When the gate 88 moves upward to open the gate, the filter assembly 7 will remain in the middle for filtering. After closing the gate 88, the threaded rod 78 is rotated to make the driving plate 77 drive the four driving rods 76 to move downward. At this time, the passive block 710 below will be driven by the active block 79 to retract, and the passive block 710 above the driving rod 76 will be retracted. 10 is squeezed by the active block 79 and moves outward to be inserted into the limiting groove 2 817 in the gate plate 88. At this time, the filter assembly 7 is connected to the gate plate 88 again and can move upward with the gate plate 88. It is located inside the gate plate 88 and does not perform filtering work. Therefore, through the cooperation of multiple active blocks 79 and passive blocks 710, the working state of the filter assembly 7 can be quickly switched. It is only necessary to remove the sealing block 2 816 and then rotate the threaded rod 1 78 to make the drive plate 77 drive the four drive rods 76 to switch. Compared with the traditional need to remove the filter screen, it can increase the convenience of switching and quickly achieve intermittent filtration.

[0047] At the same time, when the filter screen 75 is adhered to impurities such as mud that are difficult to wash away, the sealing block 2 816 can be removed, and the threaded rod 1 78 can be adjusted to make the passive block 710 protrude outward and insert into the limiting groove 1 813 in the sealing block 1 815, and remain connected to the sealing block 1 815, that is, the above-mentioned filtering state. At this time, the movable disk 811 is removed from the connecting disk 810, and the filter assembly 7 can be completely taken out for cleaning or replacement, thereby improving the convenience of disassembly and maintenance.

[0048] Optionally, in some embodiments, see Figure 11 and Figure 12 The overflow valve assembly 9 includes a lower valve body 92 and an upper shell 91. The upper shell 91 is fixedly installed on the top of the lower valve body 92, and the upper shell 91 is connected to the interior of the lower valve body 92. The lower valve body 92 is respectively provided with an outlet channel 99 and an inlet channel 910. The two ends of the lower valve body 92 are respectively connected to the connecting pipe 12 and the return pipe 6. The inlet channel 910 is connected to the connecting pipe 12, and the outlet channel 99 is connected to the return pipe 6.

[0049] The overflow valve assembly 9 also includes a threaded rod 95 and a valve core 97. A threaded block 96 is fixedly installed on the top of the upper shell 91. The threaded rod 95 is threadedly connected to the threaded block 96. The bottom end of the threaded rod 95 passes through the top of the upper shell 91 and extends to the inside. The bottom end of the threaded rod 95 is rotatably connected to a pressure plate 93. The pressure plate 93 is slidingly connected to the inner wall of the upper shell 91. A movable plate 98 is fixedly connected to the top of the valve core 97. A telescopic spring 94 is installed between the movable plate 98 and the pressure plate 93. The valve core 97 is pressed downward by the force of the telescopic spring 94 to form a seal at the connection between the water outlet channel 99 and the water inlet channel 910.

[0050] The overflow valve assembly 9 in this solution not only plays the role of overflow protection, that is, the effect of the bypass valve, but also can backwash the filter assembly 7 and discharge the filtered garbage. The upper shell 91 is fixed on the top of the lower valve body 92. The two ends of the lower valve body 92 are respectively connected to the connecting pipe 12 and the return pipe 6. The interior of the lower valve body 92 is respectively provided with an outlet channel 99 and an inlet channel 910, wherein the outlet channel 99 is connected to the return pipe 6, and the inlet channel 910 is connected to the connecting pipe 12. A threaded block 96 is fixed on the top of the upper shell 91, and the threaded rod 95 is connected to the threaded block 96. Threaded connection, the bottom end of the threaded rod 95 passes through the upper shell 91 and extends to the interior, and is rotatably connected to the pressure plate 93. The pressure plate 93 can slide up and down on the inner wall of the upper shell 91 through the drive of the threaded rod 95, and presses against the valve core 97 at the connection point between the water outlet channel 99 and the water inlet channel 910. A movable plate 98 is fixed to the top of the valve core 97, and the movable plate 98 is also slidably connected to the inner wall of the upper shell 91. A telescopic spring 94 is installed between the movable plate 98 and the pressure plate 93. The valve core 97 can be pushed downward by the force of the telescopic spring 94, so that it presses against the connection point between the water outlet channel 99 and the water inlet channel 910 to form a seal.

[0051] When the interior of the gate valve assembly 8 is unobstructed, the force of the telescopic spring 94 pushes against the valve core 97, allowing water to flow through the gate valve assembly 8. When the filter assembly 7 is blocked, the pressure inside the pipeline will increase. At this time, when the pressure exceeds the force of the telescopic spring 94, the valve core 97 will be pushed upward to connect the water outlet channel 99 and the water inlet channel 910. The water flows out through the connecting pipe 12 and the return pipe 6, bypassing the gate valve assembly 8. This can prevent the pipeline from being damaged by excessive pressure after the interior of the pipeline is blocked, and plays a role of safety redundancy. By rotating the threaded rod 2 95, the amount by which the telescopic spring 94 is compressed by the pressure plate 93 can be changed, so that the threshold value for opening the valve core 97 can be set.

[0052] It is worth mentioning that, due to the presence of the overflow valve assembly 9, when the entire pipeline needs to be closed, the two shut-off devices 13 and the gate valve assembly 8 need to be closed at the same time, so that the pipeline can be completely closed.

[0053] In addition to serving as a safety protection, the overflow valve assembly 9 can also serve as a backwashing function. When backwashing is needed to clean the filter assembly 7 and discharge the filtered garbage, the two interception devices 13 can be closed first. At this time, the pressure plate 93 is moved to the top of the upper shell 91 to minimize the threshold for opening the valve core 97, which can be easily flushed open. Then, the filter assembly 7 needs to be switched to the filtering state, and the sealing disk 11 on the sewage pipe 10 is opened. At this time, the water flow entering from the water inlet pipe 5 is blocked by the interception device 13, and will flow into the connecting pipe 12 to flush the overflow valve assembly 9, so that It enters the output pipe 1 through the return pipe 6. Since the other intercepting device 13 is also closed, the water will flow in the opposite direction, from the output pipe 1 through the gate valve assembly 8 and the filter assembly 7 into the input pipe 2, and the filter assembly 7 will be flushed in the reverse direction to clean the dirt attached to it. At the same time, the garbage accumulated inside the input pipe 2 will also be flushed into the sewage pipe 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 can not only play a role of safety redundancy, but also improve the convenience of cleaning the filter assembly 7.

[0054] Working principle: The filter component 7 in this solution has three working modes: During filtration, the passive block 710 located below the driving rod 76 protrudes outward and is inserted into the limiting groove 813 in the sealing block 815. At this time, the passive block 710 above the driving rod 76 is retracted into the movable groove 715, so that the filter assembly 7 is connected to the sealing block 815. When the gate plate 88 moves upward to open the gate, the filter assembly 7 will filter in the middle. When not filtering, the threaded rod 1 78 is rotated to make the driving plate 77 drive the four driving rods 76 to move downward. At this time, the passive block 710 below is driven by the active block 79 to retract, while the passive block 710 above the driving rod 76 is squeezed by the active block 79 to move outward and insert into the second limiting groove 817 in the gate plate 88. The filter assembly 7 can move upward with the gate plate 88 and stop filtering. When it is removed, the filter assembly 7 is kept in the filtering state. At this time, the movable disk 811 is removed from the connecting disk 810, and the filter assembly 7 together with the movable disk 811 and the sealing block 815 can be completely taken out.

[0055] The relief valve assembly 9 in this solution has two working modes: During overflow protection, the force of the telescopic spring 94 pushes the valve core 97 downward against the connection between the outlet channel 99 and the inlet channel 910 to form a seal. When the pressure inside the pipe blocked by the filter assembly 7 increases, when the pressure exceeds the force of the telescopic spring 94, the valve core 97 will be pushed upward to open the outlet channel 99 and the inlet channel 910, and the water will flow out through the connecting pipe 12 and the return pipe 6, bypassing the gate valve assembly 8. During backwashing, the two intercepting devices 13 are closed, and the pressure plate 93 is moved to minimize the threshold for opening the valve core 97. Then, the filter assembly 7 is switched to the filtering state. The water flow is blocked by the intercepting device 13 and flows into the connecting pipe 12 to flush open the overflow valve assembly 9, so that it enters the output pipe 1 through the return pipe 6. At this time, the water flows from the output pipe 1 through the gate valve assembly 8 and the filter assembly 7 into the input pipe 2, flushing the filter assembly 7 in the opposite direction. At the same time, the garbage accumulated inside the input pipe 2 will also be flushed into the sewage pipe 10 and discharged.

Claims

1. A gate valve with filtering function, characterized by: include: An output pipe (1) and an input pipe (2), wherein a gate valve assembly (8) is provided between the output pipe (1) and the input pipe (2); A filter assembly (7), the filter assembly (7) being located inside the gate valve assembly (8) and used for filtering; a return pipe (6) and a connecting pipe (12), wherein an overflow valve assembly (9) is provided between the return pipe (6) and the connecting pipe (12); The filter assembly (7) comprises a drive plate (77), a plurality of passive blocks (710) and a plurality of drive rods (76), one end of each of the plurality of drive rods (76) is fixedly connected to the outer end of the drive plate (77), two active blocks (79) are fixedly mounted on the outer end of the drive rod (76), and the passive blocks (710) are adapted to the active blocks (79); The two active blocks (79) fixedly mounted on the outer ends of the driving rod (76) face opposite directions, the driving rod (76) drives the active block (79) to move via the driving plate (77), and the active block (79) drives the passive block (710) to move by squeezing, and the moving directions of the active block (79) and the passive block (710) are perpendicular to each other.

2. The gate valve with filtering function according to claim 1, characterized in that: One end of each of the output pipe (1) and the input pipe (2) is fixedly mounted with a middle pipe (3), and the other ends of each of the two middle pipes (3) are respectively fixedly mounted with a water outlet pipe (4) and a water inlet pipe (5), and each of the two middle pipes (3) is internally mounted with a flow interception device (13) for intercepting flow, wherein one of the flow interception devices (13) is used to control the communication between the output pipe (1) and the water outlet pipe (4), and the other flow interception device (13) is used to control the communication between the input pipe (2) and the water inlet pipe (5).

3. The gate valve with filtering function according to claim 2, characterized in that: The outer end of the input pipe (2) is fixedly connected to a sewage pipe (10), the sewage pipe (10) is communicated with the interior of the input pipe (2), and the outer end of the sewage pipe (10) is detachably mounted with a sealing disk (11). One end of the return pipe (6) is fixedly connected to the outer end of the output pipe (1), and the return pipe (6) is communicated with the interior of the output pipe (1). One end of the connecting pipe (12) is fixedly connected to the outer end of the water inlet pipe (5), and the connecting pipe (12) is communicated with the interior of the water inlet pipe (5).

4. The gate valve with filtering function according to claim 1, characterized in that: The gate valve assembly (8) comprises a valve housing (81) and a gate plate (88). The output pipe (1) and the input pipe (2) are fixedly mounted on both sides of the valve housing (81), respectively. A water outlet chamber (819) and a water inlet chamber (820) are respectively provided inside the valve housing (81). The water outlet chamber (819) is communicated with the output pipe (1), and the water inlet chamber (820) is communicated with the input pipe (2). A sealing ring (89) is fixedly mounted inside the water outlet chamber (819) and the water inlet chamber (820). The gate plate (88) is located between the water outlet chamber (819) and the water inlet chamber (820). A sealing surface (814) is provided on both sides of the gate plate (88). The gate plate (88) forms a seal by contacting the sealing ring (89) through the sealing surface (814). The gate plate (88) is hollow inside and is sleeved on the outside of the filter assembly (7).

5. The gate valve with filtering function according to claim 4, characterized in that: The gate valve assembly (8) further comprises a valve cover (82) and a valve stem (84), a limit ring (83) being fixedly mounted on the inner side of the valve housing (81), the valve cover (82) being fixedly mounted on the top of the valve housing (81), a fixing frame (85) being fixedly mounted on the top of the valve cover (82), a threaded sleeve (86) being fixedly mounted on the inner side of the fixing frame (85), the valve stem (84) being threadedly connected to the threaded sleeve (86), and the bottom of the valve stem (84) passing through the valve cover (82) and extending into the interior of the valve housing (81), the bottom end of the valve stem (84) being rotatably connected to the gate plate (88), and a runner (87) being fixedly mounted on the top of the valve stem (84).

6. The gate valve with filtering function according to claim 5, characterized in that: The gate valve assembly (8) further comprises a movable disk (811), a connecting disk (810) being fixedly mounted on the bottom of the valve housing (81), the connecting disk (810) being detachably connected to the movable disk (811), a mounting port being provided at the bottom of the valve housing (811) for disassembling and mounting the filter assembly (7), a sealing block 1 (815) being fixedly mounted on the top of the movable disk (811), a sealing gasket (812) being mounted on the top of the sealing block 1 (815), a sealing surface 2 (818) being provided at the bottom of the gate plate (88), the sealing block 1 (815) extending through the mounting port to the interior of the valve housing (81), the sealing gasket (812) abutting against the sealing surface 2 (818) to form a seal, and a sealing block 2 (816) being detachably mounted on the bottom of the movable disk (811).

7. The gate valve with filtering function according to claim 1, characterized in that: The filter assembly (7) further comprises a fixed plate (71), a top plate (72), a bottom plate (73) and a threaded rod (78), wherein the top plate (72) and the bottom plate (73) are fixedly mounted on the top and bottom of the fixed plate (71), respectively; a mounting frame (74) is detachably mounted on the outer end of the fixed plate (71), a filter screen (75) is mounted on the inner side of the mounting frame (74), a plurality of movable grooves (715) are provided on the outer end of the top plate (72), and a plurality of movable grooves (715) are provided on the outer end of the bottom plate (73). A plurality of movable grooves (716) are provided, the top of the driving rod (76) is located inside the movable groove (715), the bottom of the driving rod (76) passes through the movable groove (716) and extends to the outside, the threaded rod (78) is threadedly connected to the driving plate (77), one end of the threaded rod (78) is rotatably connected to the inner side of the bottom plate (73), and the driving plate (77) is driven by the threaded rod (78) to drive the driving rod (76) to move.

8. A gate valve with filtering function according to any one of claims 1 to 7, characterized in that: The outer end of the active block (79) is provided with a slope 1 (713), and the outer end of the passive block (710) is provided with a slope 2 (714). The slope 2 (714) and the slope 1 (713) are in contact with each other. The plurality of passive blocks (710) are respectively slidably connected with the movable groove 1 (715) and the movable groove 2 (716). A slider (712) is fixedly installed on the outer side of the slope 1 (713). A slide groove (711) is provided on the outer side of the slope 2 (714). The slider (712) is slidably connected with the slide groove (711). The sealing block 1 (815) is provided with a plurality of limiting grooves 1 (813) on its inner side, and the gate plate (88) is provided with a plurality of limiting grooves 2 (817) on its inner side. The active block (79) forces the passive block (710) to move outward by squeezing the inclined surface 2 (714) through the inclined surface 1 (713). When the passive block (710) moves to the inner side of the limiting groove 2 (817), it moves along with the gate plate (88). When the passive block (710) moves to the inner side of the limiting groove 1 (813), it moves along with the sealing block 1 (815).

9. The gate valve with filtering function according to claim 1, characterized in that: The overflow valve assembly (9) comprises a lower valve body (92) and an upper shell (91), wherein the upper shell (91) is fixedly mounted on the top of the lower valve body (92), and the upper shell (91) is connected to the interior of the lower valve body (92), and a water outlet channel (99) and a water inlet channel (910) are respectively provided inside the lower valve body (92), and both ends of the lower valve body (92) are connected to the connecting pipe (12) and the return pipe (6), respectively, the water inlet channel (910) is connected to the connecting pipe (12), and the water outlet channel (99) is connected to the return pipe (6).

10. The gate valve with filtering function according to claim 9, characterized in that: The overflow valve assembly (9) further comprises a second threaded rod (95) and a valve core (97), a threaded block (96) being fixedly mounted on the top of the upper shell (91), the second threaded rod (95) being threadedly connected to the threaded block (96), the bottom end of the second threaded rod (95) passing through the top of the upper shell (91) and extending to the interior, the bottom end of the second threaded rod (95) being rotatably connected to a pressure plate (93), the pressure plate (93) being slidably connected to the inner wall of the upper shell (91), the top of the valve core (97) being fixedly connected to a movable plate (98), a telescopic spring (94) being mounted between the movable plate (98) and the pressure plate (93), the valve core (97) being pressed downward by the force of the telescopic spring (94) to form a seal at the connection between the water outlet channel (99) and the water inlet channel (910).

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