Flat gate valve with water flow velocity monitoring function

Abstract

The invention discloses a flat gate valve with a water flow velocity monitoring function, and relates to the related field of flat gate valves, the flat gate valve comprises pipeline bodies connected to the two ends of a flat gate valve body, and the right end of each pipeline body is further provided with a flow velocity monitoring assembly; the cleaning part in threaded connection moves back and forth in the impurity discharging frame through rotation of the lead screw, the outer side of the cleaning part is arranged in the two fixing frames, filter screen plates are arranged in the fixing frames in a sliding mode, and impurities on the surfaces of the filter screen plates flow through the sewage draining exit through movement of the cleaning part and arrangement of the impurity discharging mechanism. According to the flat gate valve with the water flow velocity monitoring function, the impurity discharging mechanism is arranged, impurities attached to the surface of the filter screen plate can be cleaned through the impurity discharging mechanism, filtering treatment is conducted through the sewage draining exit, in addition, stable butt joint between the pipeline body and the conveying pipeline is achieved through the arranged sealing mechanism, and the sealing effect is good. And the stable water delivery effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field related to flat gate valves, and in particular to a flat gate valve with water flow velocity monitoring function. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part, which has the characteristics of small switching torque, good sealing performance and long service life. It is widely used in the transportation of gas and liquid media in natural gas, petroleum, chemical industry, hydropower, metallurgy, urban construction and other departments; There are many types of existing flat gate valves, but there are certain shortcomings in the process of use. In the process of using flat gate valves, it is necessary to understand the flow rate of water, and the existing flat gate valves usually only have the opening and closing effects of the valve; In order to ensure the monitoring of water flow velocity, a metering monitoring gate valve disclosed in the prior art (application number CN202111426111.5, published on September 10, 2024) can be referred to. The gate valve can adjust and control the flow rate of the fluid, and can also measure the flow rate with a large range ratio and high precision. At the same time, it can also measure the pressure and temperature of the fluid in real time; At the same time, reference may be made to a soft-sealed gate valve flow monitoring device disclosed in the prior art (Chinese patent application number CN201711214146.6, published on June 18, 2019). The liquid in the pipeline of the monitoring device drives the turbine to rotate, and the turntable rotates accordingly. The pressure sensor in the turntable slides outward under the action of centrifugal force, and the probe of the pressure sensor is squeezed by the inner wall of the installation port. The faster the turbine rotates, the greater the pressure felt by the pressure sensor. Subsequently, the pressure signal is transmitted to the conductive rod through the copper needle and mercury, and then to the indicator dial, which displays the flow rate of the internal liquid. And a manual gate valve position monitoring and identification device disclosed in the prior art (Chinese patent with application number CN201711231370.6 and publication date 2019-10-29) can be referred to. The monitoring and identification device is operated by the operator with a key to prevent the gate valve from being misoperated by unrelated personnel and obtain the status (i.e. valve position) information of the manual gate valve. Then the valve position information collection terminal reads the valve position information in the electronic device and automatically transmits it to the manual gate valve status monitoring software to realize online supervision of the manual gate valve; Although the above-mentioned prior art can solve the problem of detecting water flow rate, in the process of using the flat gate valve, especially when transporting water sources containing impurities, the impurities may affect the overall monitoring effect, resulting in certain problems during use, and the above-mentioned prior art cannot perform the discharge work of impurities well.

[0003] Therefore, we propose a flat gate valve with water flow rate monitoring to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a flat gate valve with water flow rate monitoring to solve the problem that in the process of the flat gate valves currently on the market proposed in the above background technology, especially when transporting water sources containing impurities, the impurities may affect the overall monitoring effect, resulting in certain problems during use, and the above-mentioned existing technologies cannot perform the discharge work of impurities well.

[0005] To achieve the above object, the present invention provides the following technical solution: a flat gate valve with water flow velocity monitoring, comprising a pipeline body connected to both ends of the flat gate valve body, and a flow velocity monitoring component is also installed at the right end of the pipeline body; The pipeline body is also provided with sealing butt joints at both ends thereof, the outer ends of the sealing butt joints are connected to the water pipeline via flanges, a sealing mechanism is provided inside the sealing butt joints, and the sealing mechanism is provided to prevent water from leaking between the pipeline body and the water pipeline; A debris removal frame is also installed on the inner side of the pipe body near the sealing docking piece, and an independent motor is installed on the rear side of the debris removal frame. The output end of the independent motor is connected to the end of the screw rod through a coupling, and the rotation of the screw rod enables the threaded cleaning piece to move back and forth inside the debris removal frame. The outer side of the cleaning piece is arranged inside the two groups of fixed frames, and a filter screen plate is slidably arranged inside the fixed frame. The movement of the cleaning piece enables the impurities on the surface of the filter screen plate to flow through the sewage outlet through the setting of the debris removal mechanism.

[0006] Preferably, the flow rate monitoring component includes a rotating impeller rotatably arranged inside the pipeline body, and the rotating position of the rotating impeller is connected to the bottom of the display component, the top outer side of the display component is installed on the outer side of the pipeline body, and a Hall flowmeter is arranged above the rotating impeller. The model of the Hall flowmeter is DN40, and the output end position of the Hall flowmeter is connected to the display component through a connecting line. The rotation speed of the impeller can be calculated by measuring the Hall voltage, thereby obtaining the liquid flow rate.

[0007] Preferably, the impurity removal mechanism includes a cleaning piece threadedly arranged on the outer side of the screw rod, the interior of the cleaning piece is composed of a movable block, a collecting groove, a water inlet and a water outlet, and the center position of the movable block is threadedly connected to the outer side of the screw rod, and collecting grooves are provided around the movable block, and water inlets are provided at the inner middle positions of both ends of the movable block, and the interior of the water inlet is connected to the water outlet. By setting the impurity removal mechanism, impurities adhered to the outer side of the filter screen can be removed.

[0008] Preferably, the water inlets on the left and right sides are staggered, and the water outlet is arranged above the collecting tank. A pressure valve is provided at the water inlet position of the water inlet. The water source flowing through the water inlet achieves the purpose of cleaning impurities through the circulation of the water outlet, and water is transported to the water outlet through the water inlet, so that the water outlet discharges water above the collecting tank to achieve the purpose of cleaning.

[0009] Preferably, a accommodating frame is fixed to the two side surfaces of the fixed frame, and a movable block is slidably provided at the connection between the accommodating frame and the fixed frame, and the back side of the movable block is fixed to the side wall of the fixed frame by a guide member, and a filter screen is installed on the side of the movable block close to the water flow conveying direction, and the back position of the filter screen is slidably arranged inside the slide groove, and the slide groove is opened inside the fixed frame, and vertical downward fixing strips are fixed to the edge positions of both sides of the filter screen, and sewage outlets are opened at the bottom of both ends of the impurity discharge frame, and the vertical line of the sewage outlet coincides with the maximum range of movement of the cleaning member, and after the cleaning member is moved to the maximum position, the impurities above the collecting tank can be discharged through the sewage outlet along with part of the water source.

[0010] Preferably, the interior of the guide member includes a fixed cylinder fixed to the outside of the moving block, and the outer end of the fixed cylinder extends into the interior of the accommodating cylinder, the outer end of the accommodating cylinder is fixed to the surface position of the fixed frame, and a return spring is provided at the internal position of the accommodating cylinder where the fixed cylinder extends. The moving block forms a guiding sliding structure between the fixed cylinder and the accommodating cylinder, so that the moving block can stably realize the opening work through the guide member.

[0011] Preferably, the side surface of the fixed bar coincides with the position of the outer protrusion of the movable block near the collecting groove, and the side surface position of the fixed bar coincides with the outer side of the movable block. In addition, the width of the movable block is the same as the width of the upper corner of the movable block, and the filter screen plate and the fixed bar are integrated. A plurality of through holes are provided at the back of the fixed frame, and the through holes coincide with the mesh holes of the filter screen plate. After the filter screen plate moves to the maximum range, the through holes and the mesh holes are staggered. By closing the channel between the filter screen plate and the fixed frame, the pressure on one side of the fixed frame is gradually increased, so that drainage and cleaning work can be facilitated through the pressure valve.

[0012] Preferably, the sealing mechanism includes a threaded groove opened at the outer position of the middle part of the sealing docking piece, the outer side of the threaded groove is threadedly connected to the inner side of the rotating sleeve, and a docking block is rotatably arranged at the outer edge of the threaded groove, the outer side of the docking block corresponds to the outer side of the first elastic airbag, the side of the first elastic airbag away from the docking block is connected to the side of the second elastic airbag through a pipe, and the second elastic airbag is arranged at the inner side of the sealing docking piece, and the docking sealing effect can be ensured by the setting of the sealing mechanism.

[0013] Preferably, a water pipe may be embedded in the inner side of the sealing joint, and the outer side of the second elastic airbag is attached to the outer side of the water pipe, so that the outer side of the second elastic airbag can be attached to the inside of the water pipe.

[0014] Preferably, the first elastic airbag is adhered to the outer side of the sealing joint, and the elasticity of the first elastic airbag is greater than that of the second elastic airbag, so that the gas inside the first elastic airbag can be transported to the inside of the second elastic airbag.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the flat gate valve with water flow velocity monitoring is provided with a debris removal mechanism, through which the impurities adhering to the surface of the filter screen can be cleaned and filtered through the sewage outlet, and in addition, the sealing mechanism is provided to achieve stable docking between the pipeline body and the delivery pipeline, thereby ensuring the stable effect of water delivery, and the specific contents are shown as follows: 1. A debris removal frame is provided, and the cleaning piece connected to the threaded outer side of the screw rod can be driven by an independent motor to remove the impurities on the surface of the filter screen plate, and the impurities are collected and processed through the collection groove to achieve the purpose of cleaning; Furthermore, a moving block is provided. When the moving block is moved to the maximum, the filter screen plate and the fixed frame can be closed. In addition, the moving block can be opened by setting the fixed strip, so that the collecting tank can be located outside the containing frame. Impurities can be introduced into the water through the pressure valve at the water inlet, and the water can be drained through the water outlet. The water source inside the collecting tank can be cleaned by drainage, and the impurities can be drained through the sewage outlet. Furthermore, a moving block is provided, and the moving block is guided and moved by a guide member, so that the receiving frame can be in an open state, so that the collection tank can be conveniently drained and cleaned; 2. A sealing mechanism is provided, through which the pipeline body and the water pipeline can be stably butted together, and the flange can be used to stably butt the pipeline body and the water pipeline together; Furthermore, a second elastic airbag is provided, and the gas inside the first elastic airbag can be transported through the second elastic airbag by squeezing one side of the first elastic airbag through the docking block, and the second elastic airbag is attached to the outside of the water pipe to ensure the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the sealing butt joint of the present invention; Figure 3 For the present invention Figure 2The enlarged structural diagram at A in the middle; Figure 4 This is a schematic diagram of the main structure of the thread groove of the present invention; Figure 5 This is a schematic diagram of the main structure of the flow rate monitoring component of the present invention; Figure 6 This is a schematic diagram of the structure of the impurity removal frame from above according to the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 This is a schematic diagram of the main structure of the filter screen plate of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the guide member of the present invention; Fig.10 It is a schematic diagram of the front structure of the cleaning element of the present invention.

[0017] In the figure: 1. Flat gate valve body; 2. Pipe body; 3. Flow rate monitoring component; 31. Rotating impeller; 32. Display component; 4. Sealing docking piece; 5. Exhaust frame; 6. Rotating sleeve; 7. Threaded groove; 8. Docking block; 9. First elastic airbag; 10. Second elastic airbag; 11. Independent motor; 12. Screw rod; 13. Cleaning piece; 131. Moving block; 132. Collecting tank; 133. Water inlet; 134. Water outlet; 14. Fixed frame; 15. Accommodating frame; 16. Moving block; 17. Guide piece; 171. Fixed cylinder; 172. Reset spring; 173. Accommodating cylinder; 18. Slide; 19. Filter screen; 20. Fixed strip; 21. Sewage outlet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problem that the impurities may affect the overall monitoring effect during the process of the flat gate valve on the market, especially when transporting water sources containing impurities, resulting in certain problems during use, and the above-mentioned prior art cannot discharge the impurities well, please refer to the attached Figure 1 and attached Figure 6 -Attached Fig.10, the two ends of the flat gate valve body 1 are connected to the pipeline body 2, and the right end of the pipeline body 2 is also installed with a flow rate monitoring component 3; the pipeline body 2 is also installed with a debris removal frame 5 at the inner side near the sealing docking piece 4, and an independent motor 11 is installed at the rear side of the debris removal frame 5. The output end of the independent motor 11 is connected to the end of the screw rod 12 through a coupling, and the rotation of the screw rod 12 realizes the threaded connection of the cleaning member 13 to move back and forth inside the debris removal frame 5. The outer side of the cleaning member 13 is arranged inside the two sets of fixed frames 14, and the filter screen plate 19 is slidably arranged inside the fixed frame 14, and the movement of the cleaning member 13 The impurities on the surface of the filter screen 19 are circulated through the sewage outlet 21 through the setting of the impurity discharge mechanism. The impurity discharge mechanism includes a cleaning member 13 threadedly arranged on the outer side of the screw 12. The interior of the cleaning member 13 is composed of a mobile block 131, a collecting tank 132, a water inlet 133 and a water outlet 134. The center of the mobile block 131 is threadedly connected to the outer side of the screw 12, and the collecting tank 132 is opened around the mobile block 131. The inner middle position of the two ends of the mobile block 131 has a water inlet 133, and the inside of the water inlet 133 is connected to the water outlet 134. The water inlets 133 on the left and right sides are staggered, and the water outlet 134 is arranged above the collecting tank 132. A pressure valve is arranged at the water inlet position of the water inlet 133. The water source flowing through the water inlet 133 is circulated through the water outlet 134 to achieve the purpose of cleaning impurities. A accommodating frame 15 is fixed to the surface of both sides of the fixed frame 14, and a moving block 16 is slidably provided at the connection between the accommodating frame 15 and the fixed frame 14. The back side of the moving block 16 is fixed to the side wall of the fixed frame 14 through a guide member 17, and a filter screen plate 19 is installed on the side of the moving block 16 close to the water flow conveying direction. The back position of the filter screen plate 19 is slidably arranged inside a slide groove 18, and the slide groove 18 is opened inside the fixed frame 14. Vertically downward fixing strips 20 are fixed to the edge positions of both sides of the filter screen plate 19, and sewage outlets 21 are opened at the bottom of both ends of the impurity discharge frame 5, and the vertical line of the sewage outlet 21 coincides with the maximum range of movement of the cleaning member 13. The interior of the guide member 17 includes a fixed cylinder 171 fixed to the outside of the moving block 16, and the outer end of the fixed cylinder 171 extends into the interior of the accommodating cylinder 173. The outer end of the accommodating cylinder 173 is fixed to the surface position of the fixed frame 14. The fixed cylinder 171 extends into the internal position of the accommodating cylinder 173 and is provided with a return spring 172. The moving block 16 forms a guiding sliding structure between the fixed cylinder 171 and the accommodating cylinder 173.The side of the fixed strip 20 coincides with the outer protrusion position of the mobile block 131 near the collecting groove 132, and the side position of the fixed strip 20 coincides with the outer side of the mobile block 16. In addition, the width of the mobile block 16 is the same as the width of the upper corner of the mobile block 131, and the filter screen plate 19 and the fixed strip 20 are integrated. A plurality of through holes are provided at the back of the fixed frame 14, and the through holes coincide with the mesh holes of the filter screen plate 19, and the through holes and the mesh holes are misaligned after the filter screen plate 19 moves to the maximum range. When it is necessary to perform impurity removal work, the independent impurity removal frame 5 installed at the back is activated. The motor 11, the output end of the independent motor 11 can realize the rotation of the screw rod 12 inside the impurity removal frame 5. At this time, the cleaning member 13 threadedly connected to the outside of the screw rod 12 fits on the outside of the filter screen plate 19 for movement, and the impurities on the surface of the filter screen plate 19 can be scraped and cleaned by the outermost side of the moving block 131. At this time, the impurities fall into the inside of the collection tank 132 through the movement of the moving block 131. When the moving block 131 moves to the maximum range, the outer side of the moving block 131 fits on the side of the fixed strip 20 set on one side of the filter screen plate 19, and the fixed strip 20 will move. , one side of the fixing strip 20 can drive the filter screen plate 19 to slide inside the slide groove 18. At this time, the mesh of the filter screen plate 19 and the through hole of the fixing frame 14 will be misaligned with each other, resulting in the water source inside the impurity discharge frame 5 being unable to flow. At this time, the side of the fixing strip 20 will also squeeze the outer side of the moving block 16, so that the moving block 16 can be guided and moved by the guide member 17. The side of the guide member 17 is elastically slidable inside the accommodating tube 173 through the cooperation of the fixing tube 171 and the return spring 172. When the cleaning member 13 moves to the maximum position, the water source inside the impurity discharge frame 5 is When the water cannot circulate, the pressure inside the impurity removal frame 5 increases with the continuous delivery of water. At this time, the pressure valve on the side of the movable block 131 will open, so that the water inlet 133 can deliver part of the water, and the water can flow through the water outlet 134, and the water is discharged to the top of the collecting tank 132 through the water outlet 134. At this time, the inside of the collecting tank 132 can be cleaned by the water source, and the impurities will be drained through the sewage outlet 21, so that the impurities can be cleaned. The independent motor 11 controls the rotation of the screw rod 12 in different directions to achieve impurity removal at different positions.

[0020] Embodiment 2: In order to ensure the butt sealing effect between the pipeline body 2 and the pipeline, please refer to the attached Figure 1 -Attached Figure 4The two ends of the pipeline body 2 are connected with sealing docking parts 4, the outer ends of the sealing docking parts 4 are connected to the water pipeline through flanges, and a sealing mechanism is arranged inside the sealing docking parts 4, and the arrangement of the sealing mechanism realizes the leakage prevention of water source between the pipeline body 2 and the water pipeline; the sealing mechanism includes a thread groove 7 opened at the outer position of the middle part of the sealing docking part 4, the outer side of the thread groove 7 is threadedly connected to the inner side of the rotating sleeve 6, and a docking block 8 is rotatably arranged at the outer edge of the thread groove 7, the outer side of the docking block 8 corresponds to the outer side of the first elastic airbag 9, and the side of the first elastic airbag 9 away from the docking block 8 is connected to the side of the second elastic airbag 10 through a pipeline, and the second elastic airbag 10 is arranged at the inner side of the sealing docking part 4. The inner side of the sealing docking part 4 can be embedded with a water pipeline, and the outer side of the second elastic airbag 10 is attached to the outer side of the water pipeline. The first elastic airbag 9 is adhered to the outer side of the sealing docking part 4, and the elasticity of the first elastic airbag 9 is greater than the elasticity of the second elastic airbag 10.

[0021] After the water supply pipe is inserted into the interior of the pipe body 2, the rotating sleeve 6 is rotated, and the inner side of the rotating sleeve 6 is threadedly rotated on the outer side of the thread groove 7, so that the docking block 8 arranged on the outer side of the rotating sleeve 6 can be moved, so that the docking block 8 squeezes the outer side of the first elastic airbag 9 during the movement, so that the gas inside the first elastic airbag 9 can be transported to the inside of the second elastic airbag 10, and the second elastic airbag 10 expands on the inner side of the sealing docking piece 4. At this time, the outer side of the second elastic airbag 10 is attached to the inner side of the water supply pipe, ensuring the sealing effect of the pipe body 2 and the water supply pipe, and then a secondary docking can be performed by using a flange.

[0022] Embodiment 3: In order to facilitate the monitoring of the water flow of the flat gate valve body 1 and the pipeline body 2, please refer to the attached Figure 1 and attached Figure 5 The flow rate monitoring component 3 includes a rotating impeller 31 rotatably arranged inside the pipeline body 2, and the rotating position of the rotating impeller 31 is connected to the bottom of the display component 32, and the top outer side of the display component 32 is installed on the outer side of the pipeline body 2. A Hall flowmeter is arranged above the rotating impeller 31. The model of the Hall flowmeter is DN40, and the output end position of the Hall flowmeter is connected to the display component 32 through a connecting line. By opening the gate valve of the flat gate valve body 1, the circulation of water flow can be realized, and the rotating impeller 31 is rotated by the water flow, and the Hall flowmeter can work. When the rotating impeller 31 rotates in a perpendicular magnetic field, the impeller cuts the magnetic lines and generates a Hall voltage. The rotation speed of the impeller can be calculated by measuring the Hall voltage, thereby obtaining the liquid flow rate, and the obtained water flow rate can be displayed by the display component 32.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flat gate valve with water flow velocity monitoring function, comprising a flat gate valve body (1) connected to a pipe body (2) at both ends thereof, wherein a flow velocity monitoring component (3) is also installed at the right end of the pipe body (2); It is characterized in that Also includes: Sealing butt joints (4) are connected to both ends of the pipeline body (2); the outer ends of the sealing butt joints (4) are connected to the water pipeline via flanges; a sealing mechanism is provided inside the sealing butt joints (4); the sealing mechanism is provided to prevent water from leaking between the pipeline body (2) and the water pipeline; A debris removal frame (5) is also installed at an inner side of the pipe body (2) near the sealing docking piece (4), and an independent motor (11) is installed at a rear side of the debris removal frame (5). The output end of the independent motor (11) is connected to the end of a screw rod (12) via a coupling, and the rotation of the screw rod (12) enables a threaded cleaning member (13) to move back and forth inside the debris removal frame (5). The outer side of the cleaning member (13) is arranged inside two groups of fixed frames (14), and a filter screen (19) is slidably arranged inside the fixed frame (14). The movement of the cleaning member (13) enables impurities on the surface of the filter screen (19) to flow through the sewage outlet (21) through the arrangement of the debris removal mechanism.

2. A flat gate valve with water flow rate monitoring according to claim 1, characterized in that: The flow rate monitoring component (3) comprises a rotating impeller (31) rotatably arranged inside the pipeline body (2), and the rotating position of the rotating impeller (31) is connected to the bottom of the display component (32), and the top outer side of the display component (32) is installed at the outer position of the pipeline body (2), and a Hall flow meter is arranged above the rotating impeller (31), the model of the Hall flow meter is DN40, and the output end position of the Hall flow meter is connected to the display component (32) through a connecting line.

3. A flat gate valve with water flow rate monitoring according to claim 1, characterized in that: The impurity removal mechanism comprises a cleaning member (13) threadedly arranged on the outer side of the screw rod (12); the interior of the cleaning member (13) is composed of a movable block (131), a collecting groove (132), a water inlet (133) and a water outlet (134); the center of the movable block (131) is threadedly connected to the outer side of the screw rod (12); the collecting groove (132) is provided at the surrounding positions of the movable block (131); the water inlet (133) is provided at the inner side of the middle of both ends of the movable block (131); and the interior of the water inlet (133) is connected to the water outlet (134).

4. A flat gate valve with water flow rate monitoring according to claim 3, characterized in that: The water inlets (133) on the left and right sides are staggered, and the water outlet (134) is arranged above the collecting tank (132). A pressure valve is arranged at the water inlet position of the water inlet (133), and the water source flowing through the water inlet (133) is circulated through the water outlet (134) to achieve the purpose of cleaning impurities.

5. The flat gate valve with water flow rate monitoring according to claim 1, characterized in that: A receiving frame (15) is fixed to both side surfaces of the fixed frame (14); a moving block (16) is slidably arranged at a connection position of the receiving frame (15) close to the fixed frame (14); the back side of the moving block (16) is fixed to the side wall of the fixed frame (14) through a guide member (17); a filter screen (19) is installed on the side of the moving block (16) close to the water flow conveying direction; the back side of the filter screen (19) is slidably arranged inside a slide groove (18); the slide groove (18) is opened inside the fixed frame (14); vertically downward fixing strips (20) are fixed to the edge positions of both sides of the filter screen (19); sewage outlets (21) are opened at the bottom of both ends of the impurity discharge frame (5); the vertical line of the sewage outlet (21) coincides with the maximum range of movement of the cleaning member (13).

6. A flat gate valve with water flow rate monitoring according to claim 5, characterized in that: The interior of the guide member (17) includes a fixed cylinder (171) fixed to the outside of the moving block (16), and the outer end of the fixed cylinder (171) extends into the interior of the accommodating cylinder (173). The outer end of the accommodating cylinder (173) is fixed to the surface of the fixed frame (14). A return spring (172) is provided at the position where the fixed cylinder (171) extends into the interior of the accommodating cylinder (173). The moving block (16) forms a guiding sliding structure between the fixed cylinder (171) and the accommodating cylinder (173).

7. A flat gate valve with water flow rate monitoring according to claim 5, characterized in that: The side of the fixing bar (20) coincides with the outer protrusion of the movable block (131) near the collecting groove (132), and the side of the fixing bar (20) coincides with the outer side of the movable block (16). In addition, the width of the movable block (16) is the same as the width of the upper corner of the movable block (131). The filter screen plate (19) and the fixing bar (20) are integrated. A plurality of through holes are provided at the back of the fixing frame (14). The through holes coincide with the mesh holes of the filter screen plate (19), and the through holes are misaligned with the mesh holes after the filter screen plate (19) moves to the maximum range.

8. The flat gate valve with water flow rate monitoring according to claim 1, characterized in that: The sealing mechanism comprises a thread groove (7) provided at an outer position of a middle part of the sealing docking piece (4); the outer side of the thread groove (7) is threadedly connected to the inner side of the rotating sleeve (6); a docking block (8) is rotatably provided at the outer edge of the thread groove (7); the outer side of the docking block (8) corresponds to the outer side of a first elastic airbag (9); a side of the first elastic airbag (9) away from the docking block (8) is connected to a side of a second elastic airbag (10) via a pipeline; and the second elastic airbag (10) is provided at an inner side of the sealing docking piece (4).

9. A flat gate valve with water flow rate monitoring according to claim 8, characterized in that: A water pipeline may be embedded in the inner side of the sealing docking piece (4), and the outer side of the second elastic airbag (10) is attached to the outer side of the water pipeline.

10. A flat gate valve with water flow rate monitoring according to claim 8, characterized in that: The first elastic airbag (9) is adhered to the outer side of the sealing butt joint (4), and the elasticity of the first elastic airbag (9) is greater than the elasticity of the second elastic airbag (10).

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