Scouring-resistant and corrosion-resistant gate valve

Abstract

The invention belongs to the technical field of gate valves, and particularly relates to a scouring-resistant and corrosion-resistant gate valve which comprises a valve body, a valve cover is fixedly mounted on the valve body, a control component is arranged in the valve cover and controls a valve rod to rotate in the valve cover, the lower end of the valve rod is in threaded connection with a gate plate, and the gate plate slides in the valve body and the valve cover. The supporting component is arranged on the outer side of the valve body, the valve rod is controlled to rotate through the control component, the valve rod drives the gate plate to ascend or descend, then the gate valve is opened or closed, fluid is controlled to be conducted or blocked, and a ceramic sealing face is arranged at the joint of the interior of the valve body and the gate plate and has a certain corrosion-resistant effect. The filtering part arranged in the valve body can intercept and filter impurities in fluid, the corrosion resistance of the gate valve is further improved, in addition, the filtering part has the effect of reducing the flow speed of the fluid, impact of the fluid on the gate plate is reduced, and the valve body can be fixed to the ground or a building through the supporting part arranged on the outer side of the valve body. And the pressure of the gate valve on the pipeline is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of gate valves, and in particular relates to an erosion-resistant and corrosion-resistant gate valve. Background Art

[0002] During the use of existing gate valves, there are often many impurities in the fluid, which more or less adhere to the connection between the gate plate and the valve body, causing corrosion damage to it and reducing the sealing performance of the gate valve;

[0003] For example, the patent application number is CN201510879069.0, a new type of corrosion-resistant gate valve, including a gate, a cooling circulation channel, a cooling flow channel, a spring return seat, a lower rebound hammer, a spring, a linkage flow channel rod, a hollow upper valve stem, an upper valve stem inner tube, a cooling water inlet, an induction tube, an induction switch, a valve cover, a valve body, a cooling water outlet, a lower flow channel, a seal, a valve seat, a valve stem, an induction main valve, a hand lever, a cooling cabin, a cooling internal flow, a valve frame, a valve cover inner cavity, an upper rebound hammer, and a drainage switch. The new type of corrosion-resistant gate valve is provided on the right side of the valve body. The cooling flow channel guides the cooling water to the cooling chamber and flows into the cooling inner flow respectively, and flows to the inner tube of the upper valve stem through the drainage switch. It flows from the cooling inner flow to the cooling outlet one way, and the drainage switch guides the cooling water from the cooling chamber to flow downward from the upper valve stem inner tube to push the upper rebound hammer, and enters the valve stem through the lower rebound hammer and spring return seat, and enters the cooling circulation channel around the gate to cool the gate. However, the disadvantage of this technical solution is that the impurities in the fluid more or less adhere to the connection between the gate and the valve body, causing corrosion damage to it, and reducing the sealing of the gate valve. Summary of the invention

[0004] The purpose of the present invention is to provide a scour-resistant and corrosion-resistant gate valve to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A scour-resistant and corrosion-resistant gate valve comprises a valve body, a valve cover is fixedly mounted on the valve body, a control component is arranged inside the valve cover, the control component controls the valve stem to rotate inside the valve cover, the lower end of the valve stem is threadedly connected to the gate plate, the gate plate slides inside the valve body and the valve cover, a filter component is arranged inside the valve body, and a support component is arranged outside the valve body.

[0006] Furthermore, the control component includes bevel gear 2, which is fixed on the upper end of the valve stem, meshing with bevel gear 1 for transmission, bevel gear 1 being rotatably connected to the valve cover, a plug rod being slidably connected inside bevel gear 1, and the plug rod being fixedly connected to the rotating rod.

[0007] Furthermore, a chamber is provided on the side of the valve cover, and a limiting ball is slidably connected in the chamber. A spring is provided between the limiting ball and the inner wall of the chamber. The front end of the limiting ball is clamped in a groove set on the rotating rod. A packing is provided at the rotating connection between the valve stem and the valve cover, and the lower end of the rotating rod is tilted outward.

[0008] Furthermore, there are two flaps rotatably connected inside the gate plate, and torsion springs are provided at the rotatable connections between the two flaps and the gate plate. There are two rotating knobs rotatably connected to the upper side of the gate plate, and baffle rods are fixed to the front ends of the two rotating knobs. The front ends of the two baffle rods are respectively against the two flaps. Two baffle rod storage grooves are provided in the gate plate, and a limit groove, a clamping groove and a baffle are provided in the valve body. The upper end of the filter component is against the baffle block, and the two sides of the lower end of the filter component are respectively clamped in the limit groove and the clamping groove.

[0009] Furthermore, the filter component includes a filter screen, which is inserted into the valve body from the lower end of the valve body, the top of the filter screen is against the side of the block, the boss set at the lower end of the filter screen is clamped in the clamping groove, and a plurality of reinforcing ribs are provided in the filter screen.

[0010] Furthermore, a connecting plate 1 is fixed at one end of the filter screen, and a connecting plate 2 is fixed at the other end of the filter screen. Racks are provided on the inner sides of the connecting plate 1 and the connecting plate 2, and a center plate is provided between the connecting plate 1 and the connecting plate 2. The two ends of the center plate are respectively slidably connected to the two ends of the filter screen, and a center rod is rotatably connected to the middle of the center plate, and a gear is provided on the center rod. Both racks are meshed with the gears for transmission, and an eccentric wheel is rotatably connected to the center plate, and the outer wall of the eccentric wheel is squeezed on the middle of the center rod, and the eccentric wheel is fixedly connected to the lever.

[0011] Furthermore, a protrusion is provided on the side of the center plate, the protrusion is slidably connected to the side slider, a second spring is provided between the protrusion and the side slider, a lower slider is slidably connected to the lower end of the side slider, a third spring is provided between the side slider and the lower slider, and the side slider is clamped in the limiting groove.

[0012] Furthermore, a cleaning component is provided in the filter screen, and the cleaning component includes a conical tube, which is fixed at the lower end of the valve body. After the conical tube is fixed to the valve body, the lower slider is squeezed to move upward, driving the spring three to be compressed, and the conical tube is rotatably connected to the outer tube. A filler two is provided at the rotatable connection between the conical tube and the outer tube, and the upper end of the outer tube is fixedly connected to the outer frame.

[0013] Furthermore, a turbine turntable is rotatably connected inside the outer frame, and the turbine turntable is slidably connected to three sliding rods. Arc-shaped cleaning brushes are fixed to the front ends of the three sliding rods, and the three sliding rods slide inside the outer frame. An inner tube is fixed to the lower end of the turbine turntable, and a flow velocity sensor is provided in the inner tube. The detection end of the flow velocity sensor is located in the valve body, and an impurity outflow pipe is fixed to the bottom of the conical tube, and a ball valve is provided in the impurity outflow pipe.

[0014] Furthermore, the supporting component includes a bracket, which is fixedly connected to both ends of the lower shock-absorbing assembly, and an upper shock-absorbing assembly is fixed to the upper end of the lower shock-absorbing assembly. The lower shock-absorbing assembly has the same structure as the upper shock-absorbing assembly and both include an arc-shaped outer frame, a shell is fixed to the upper end of the arc-shaped outer frame, a support plate 2 is slidably provided in the shell, a support rod is fixed in the support plate 2, the support rod is slidably connected to the arc-shaped outer frame, an arc-shaped inner frame is fixed to the lower end of the support rod, a support plate 1 is slidably connected in the shell, the support plate 1 is slidably connected to the support rod, a spring 4 is provided between the support plate 1 and the support plate 2, the side surface of the shell is rotatably connected to the screw, the upper end of the screw is threadedly connected to the support plate 1, and the arc-shaped inner frame is tightly attached to the outer wall of the valve body.

[0015] The advantages of the present invention are:

[0016] The valve stem is controlled to rotate through the control component, and the valve stem drives the gate plate to rise or fall, thereby opening or closing the gate valve and controlling the conduction or blocking of the fluid. The connection between the valve body and the gate plate is a ceramic sealing surface, which has a certain corrosion resistance. The filter component arranged in the valve body can intercept and filter impurities in the fluid, further improving the corrosion resistance of the gate valve. In addition, the filter component has the effect of slowing down the flow rate of the fluid and reducing the impact of the fluid on the gate plate. The valve body can be fixed on the ground or a building through the supporting component arranged on its outside, thereby reducing the pressure of the gate valve itself on the overall pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 The control component structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 4 The control component structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 5 for Figure 4 A partial enlarged view of the middle part;

[0022] Figure 6 The control component structure of the present invention is shown in FIG. Figure 3 ;

[0023] Figure 7 The control component structure of the present invention is shown in FIG. Figure 4 ;

[0024] Figure 8 The control component structure of the present invention is shown in FIG. Figure 5 ;

[0025] Fig. 9 Schematic diagram of the filter component structure of the present invention Figure 1 ;

[0026] Fig.10 Schematic diagram of the filter component structure of the present invention Figure 2 ;

[0027] Fig.11 Schematic diagram of the filter component structure of the present invention Figure 3 ;

[0028] Fig.12 for Fig.11 A partial enlarged view of point B in the middle;

[0029] Fig.13 Schematic diagram of the cleaning component structure of the present invention Figure 1 ;

[0030] Fig.14 Schematic diagram of the cleaning component structure of the present invention Figure 2 ;

[0031] Fig.15 Schematic diagram of the cleaning component structure of the present invention Figure 3 ;

[0032] Fig.16 The supporting component structure of the present invention is schematically shown in FIG. Figure 1 ;

[0033] Fig.17 The supporting component structure of the present invention is schematically shown in FIG. Figure 2 ;

[0034] Fig.18 for Fig.17 A partial enlarged view of point C in the middle;

[0035] Description of the markings in the figure:

[0036] Valve body 1; rotating rod 2; spring 13; limiting ball 4; plug rod 5; bevel gear 16; valve cover 7; bevel gear 2 8; packing 19; valve stem 10; gate 11; knob 12; stop rod 13; stop rod storage slot 14; flap 15; limiting slot 16; slot 17; stop block 18; filter screen 19; reinforcing rib 20; connecting plate 1 21; connecting plate 2 22; center rod 23; gear 24; center plate 25; lever 26; bump 27; side slide block 28; Spring 29; Spring 30; Lower slider 31; Tapered tube 32; Packing 2 33; Outer tube 34; Outer frame 35; Turbine turntable 36; Inner tube 37; Slide bar 38; Arc-shaped cleaning brush 39; Flow rate sensor 40; Ball valve 41; Impurity outflow pipe 42; Bracket 43; Arc-shaped outer frame 44; Shell 45; Screw 46; Support plate 1 47; Support rod 48; Spring 49; Support plate 2 50; Arc-shaped inner frame 51; Boss 52; Eccentric wheel 53. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] Embodiment 1

[0040] like Figure 1-18 As shown, a scour-resistant and corrosion-resistant gate valve comprises a valve body 1, a valve cover 7 is fixedly mounted on the valve body 1, a control component is arranged inside the valve cover 7, the control component controls a valve stem 10 to rotate inside the valve cover 7, the lower end of the valve stem 10 is threadedly connected with a gate plate 11, the gate plate 11 slides inside the valve body 1 and the valve cover 7, a filter component is arranged inside the valve body 1, and a support component is arranged outside the valve body 1;

[0041] The working principle of the above technical solution is: the valve stem 10 is controlled to rotate by the control component, and the valve stem 10 drives the gate plate 11 to rise or fall, thereby opening or closing the gate valve to control the conduction or blocking of the fluid. The connection between the valve body 1 and the gate plate 11 is a ceramic sealing surface, which has a certain corrosion resistance. The filter component arranged in the valve body 1 can intercept and filter impurities in the fluid, further improving the corrosion resistance of the gate valve. In addition, the filter component has the effect of slowing down the flow rate of the fluid, reducing the impact of the fluid on the gate plate 11. The valve body 1 can be fixed on the ground or a building through the supporting component arranged on its outside, thereby reducing the pressure of the gate valve itself on the overall pipeline.

[0042] Embodiment 2

[0043] like Figure 1-18 As shown, the control component includes a bevel gear 2 8, which is fixed to the upper end of the valve stem 10, and the bevel gear 2 8 is meshed with the bevel gear 1 6 for transmission, and the bevel gear 1 6 is rotatably connected to the valve cover 7, and a plug rod 5 is slidably connected inside the bevel gear 1 6, and the plug rod 5 is fixedly connected to the rotating rod 2;

[0044] The valve cover 7 is provided with a chamber on the side, and a limiting ball 4 is slidably connected in the chamber, a spring 3 is provided between the limiting ball 4 and the inner wall of the chamber, and the front end of the limiting ball 4 is clamped in a groove provided on the rotating rod 2. A packing 9 is provided at the rotating connection between the valve stem 10 and the valve cover 7, and the lower end of the rotating rod 2 is tilted outward;

[0045] The working principle of the above technical solution is: pull the tilted position of the lower end of the rotating rod 2 outward, drive the rotating rod 2 to move outward, the limiting ball 4 is separated from the groove set on the rotating rod 2, drive the plug rod 5 to move outward, drive the plug rod 5 and the bevel gear 1 6 to slide, rotate the rotating rod 2, drive the plug rod 5 to rotate, drive the bevel gear 1 6 to rotate, drive the bevel gear 2 8 to rotate, drive the valve stem 10 to rotate, drive the gate 11 to rise, and then the fluid can pass through the valve body 1;

[0046] When the lifting and lowering adjustment of the gate plate 11 is completed, the rotating rod 2 is pushed toward the side close to the valve cover 7, driving the plug rod 5 to slide in the bevel gear 6 until the rotating rod 2 fits against the outer wall of the valve cover 7. At this time, under the elastic force of the spring 3, the front end of the limiting ball 4 is engaged with the groove set on the rotating rod 2, thereby limiting the rotating rod 2 to prevent it from moving outward at will. At this time, the rotating rod 2 is stored to reduce its occupied space. In addition, compared with the traditional handwheel set at the upper end of the gate valve, in this solution, the rotation of the valve stem 10 is controlled from the side, which can further reduce the space occupied and facilitate installation operations in a smaller space.

[0047] Embodiment 3

[0048] like Figure 1-18As shown, the gate plate 11 is rotatably connected to two flaps 15, and the two flaps 15 are rotatably connected to the gate plate 11 at the connection points where the two flaps 15 are rotatably connected to the gate plate 11. Two knobs 12 are rotatably connected to the upper side of the gate plate 11, and the front ends of the two knobs 12 are fixed with stop rods 13, and the front ends of the two stop rods 13 are respectively against the two flaps 15. Two stop rod storage grooves 14 are provided in the gate plate 11, and a limiting groove 16, a clamping groove 17 and a stopper 18 are provided in the valve body 1. The upper end of the filter component is against the stopper 18, and the two sides of the lower end of the filter component are respectively clamped in the limiting groove 16 and the clamping groove 17;

[0049] The working principle of the above technical solution is as follows: the valve cover 7 is disassembled, and then the valve stem 10 and the gate plate 11 are taken out, and the two knobs 12 are turned to drive the two blocking rods 13 to rotate, so that the lower ends of the two blocking rods 13 are separated from the two flaps 15 respectively, and the lower ends of the two blocking rods 13 are respectively turned into the two blocking rod storage grooves 14, and then the valve stem 10 and the gate plate 11 are put back into the valve body 1, and the valve cover 7 is installed. When fluid passes from left to right in the valve body 1, the fluid impacts the two flaps 15 to open, and the two torsion springs are deformed, and the fluid can pass through the valve body 1 from left to right. When fluid passes from right to left in the valve body 1, the two flaps 15 are tightly attached to the gate plate 11, and the fluid cannot pass through the valve body 1 from left to right, and then the gate valve is transformed into a check valve. The gate valve and the check valve can be switched at will, which is suitable for various pipeline usage conditions.

[0050] The upper end of the filter component is limited by the block 18 to increase the strength of the filter component during fluid impact and prevent the upper end from bending easily. The lower end of the filter component is limited by the limiting groove 16 and the clamping groove 17 to ensure that when the filter component is installed into the valve body 1, its opening direction corresponds to the direction in which the fluid enters.

[0051] Embodiment 4

[0052] like Figure 1-18 As shown, the filter component includes a filter screen 19, which is inserted into the valve body 1 from the lower end of the valve body 1, the top of the filter screen 19 is against the side of the block 18, the boss 52 provided at the lower end of the filter screen 19 is clamped in the clamping groove 17, and a plurality of reinforcing ribs 20 are provided in the filter screen 19;

[0053] A connecting plate 21 is fixed to one end of the filter 19, and a connecting plate 22 is fixed to the other end of the filter 19. Racks are provided on the inner sides of the connecting plates 21 and 22. A center plate 25 is provided between the connecting plates 21 and 22. The two ends of the center plate 25 are respectively slidably connected to the two ends of the filter 19. A center rod 23 is rotatably connected to the middle of the center plate 25. A gear 24 is provided on the center rod 23. Both racks are meshed with the gear 24 for transmission. An eccentric wheel 53 is rotatably connected to the center plate 25. The outer wall of the eccentric wheel 53 is squeezed in the middle of the center rod 23. The eccentric wheel 53 is fixedly connected to the lever 26.

[0054] A convex block 27 is provided on the side of the center plate 25, and the convex block 27 is slidably connected to the side slider 28. A second spring 29 is provided between the convex block 27 and the side slider 28. A lower slider 31 is slidably connected to the lower end of the side slider 28. A third spring 30 is provided between the side slider 28 and the lower slider 31. The side slider 28 is clamped in the limiting groove 16.

[0055] The working principle of the above technical solution is as follows: the filter 19 is inserted into the valve body 1 from the lower end of the valve body 1, and the upper end of the filter 19 is against the side of the block 18 to prevent the upper end of the filter 19 from bending when it is impacted by the fluid. When the filter 19 is inserted into the valve body 1, the side slider 28 is inserted into the limiting groove 16 to ensure that the opening of the filter 19 is in the direction of the fluid flow. The boss 52 arranged at the lower end of the filter 19 is clamped in the clamping groove 17. When the lower end of the valve body 1 is docked and fixed with the tapered tube 32, the boss 52 is clamped between the valve body 1 and the tapered tube 32. The boss 52 has a positioning effect on the filter 19 to prevent the filter 19 from excessively moving up and ensure the stability of the filter 19 during use. The multiple reinforcing ribs 20 arranged in the filter 19 can increase the strength of the overall structure of the filter 19 so that it will not be bent or deformed at will.

[0056] The filter screen 19 is a sheet material approximately in a triangular shape rolled into a barrel shape. A connecting plate 1 21 is fixed at one end of the filter screen 19, and a connecting plate 2 22 is fixed at the other end of the filter screen 19. Since the side slider 28 is inserted into the limit groove 16, the side slider 28 will not move laterally, and the protrusion 27 and the center plate 25 will not move laterally in the valve body 1. The center plate 25 and the center rod 23 therein are relatively fixed in position. The center rod 23 is rotated to drive the connecting plate 1 21 and the connecting plate 22 to move through the gear 24, and drive the two ends of the filter screen 19 to move together or away from each other, thereby changing the inner diameter of the filter screen 19 so that the edge of its outer wall is more closely attached to the inner wall of the valve body 1. After the adjustment is completed, the lever 26 is rotated; the eccentric wheel 53 is driven to rotate, and the eccentric wheel 53 is squeezed on the center rod 23 to prevent it from automatically rotating at will. In addition, the inner diameter of the filter screen 19 can be changed by rotating the center rod 23 to adapt to different models of valve bodies 1;

[0057] When the lower end of the valve body 1 is docked and fixed with the tapered tube 32, the tapered tube 32 squeezes the lower slider 31 to move upward, driving the spring three 30 to be compressed. The spring three 30 has a directional thrust on the opposite side slider 28, driving the protrusion 27 and the center plate 25 to have a directional thrust, and driving the filter screen 19 to have a certain upward thrust, so that the upper end of the filter screen 19 is tightly attached to the inner wall of the valve body 1, preventing a gap between the filter screen 19 and the inner wall of the valve body 1, which causes a reduction in the impurity filtering effect.

[0058] Embodiment 6

[0059] like Figure 1-18As shown, the filter screen 19 is provided with a cleaning component, which includes a conical tube 32, which is fixed to the lower end of the valve body 1. After the conical tube 32 is fixed to the valve body 1, the lower slider 31 is squeezed to move upward, driving the spring 30 to be compressed, and the conical tube 32 is rotatably connected to the outer tube 34. A packing 2 33 is provided at the rotatable connection between the conical tube 32 and the outer tube 34, and the upper end of the outer tube 34 is fixedly connected to the outer frame 35.

[0060] The outer frame 35 is rotatably connected with a turbine turntable 36, and the turbine turntable 36 is slidably connected with three slide bars 38. The front ends of the three slide bars 38 are fixed with arc-shaped cleaning brushes 39. The three slide bars 38 slide in the outer frame 35. The lower end of the turbine turntable 36 is fixed with an inner tube 37, and a flow rate sensor 40 is arranged in the inner tube 37. The detection end of the flow rate sensor 40 is located in the valve body 1. An impurity outflow pipe 42 is fixed at the bottom of the conical tube 32, and a ball valve 41 is arranged in the impurity outflow pipe 42.

[0061] The working principle of the above technical solution is as follows: a part of the impurities filtered by the filter 19 falls from between the outer frame 35 and the inner wall of the tapered tube 32 to the bottom of the tapered tube 32. Since the upper surface of the outer frame 35 is tapered, the impurities thereon can slide to the bottom of the tapered tube 32. After the filter 19 is used for a period of time, the ball valve 41 is opened, and the fluid can flush the deposited impurities out from the impurity outflow pipe 42.

[0062] When the flow rate sensor 40 detects that the flow rate of the fluid in the valve body 1 slows down, it may be caused by too many impurities attached to the filter 19, which blocks its mesh and makes it difficult for the fluid to pass through. At this time, the inner tube 37 is rotated to drive the turbine turntable 36 to rotate, drive the three slide bars 38 to slide outward in the outer frame 35, drive the three arc-shaped cleaning brushes 39 to move outward, drive the three arc-shaped cleaning brushes 39 to press against the inner wall of the filter 19, move the outer tube 34 back and forth up and down, drive the outer frame 35 to move back and forth up and down, drive the three arc-shaped cleaning brushes 39 to move back and forth up and down, and the arc-shaped cleaning brushes 39 clean the impurities in the filter 19. At the same time, the outer tube 34 is reciprocated by a small amplitude, drive the outer frame 35 to reciprocate by a small amplitude, drive the three arc-shaped cleaning brushes 39 to reciprocate by a small amplitude, increase the cleaning area in the filter 19, and the three arc-shaped cleaning brushes 39 can extend outward or shrink inward to adapt to filter screens 19 of different calibers;

[0063] After cleaning the filter screen 19, the inner tube 37 is rotated counterclockwise again to drive the turbine turntable 36 to rotate counterclockwise, drive the three slide bars 38 to move together, drive the three arc-shaped cleaning brushes 39 to move together and closely adhere to the outside of the outer frame 35 to prevent the three arc-shaped cleaning brushes 39 from branching outward and affecting the falling of impurities. At the same time, the outer tube 34 is pulled downward to drive the outer frame 35 to move down to the connection between the valve body 1 and the tapered tube 32 to prevent the outer frame 35 from blocking the flow of fluid in the valve body 1.

[0064] Embodiment 7

[0065] like Figure 1-18 As shown, the support component includes a bracket 43, the bracket 43 is fixedly connected to both ends of the lower shock-absorbing assembly, the upper end of the lower shock-absorbing assembly is fixed with an upper shock-absorbing assembly, the lower shock-absorbing assembly has the same structure as the upper shock-absorbing assembly, and both include an arc-shaped outer frame 44, the upper end of the arc-shaped outer frame 44 is fixed with a shell 45, a support plate 2 50 is slidably arranged in the shell 45, a support rod 48 is fixed in the support plate 2 50, the support rod 48 is slidably connected to the arc-shaped outer frame 44, an arc-shaped inner frame 51 is fixed to the lower end of the support rod 48, a support plate 1 47 is slidably connected in the shell 45, the support plate 1 47 is slidably connected to the support rod 48, a spring 49 is arranged between the support plate 1 47 and the support plate 2 50, the side surface of the shell 45 is rotatably connected to the screw 46, the upper end of the screw 46 is threadedly connected to the support plate 1 47, and the arc-shaped inner frame 51 is tightly attached to the outer wall of the valve body 1;

[0066] The working principle of the above technical solution is: the bracket 43 is fixedly connected to the arc-shaped outer frame 44 in the lower shock-absorbing assembly at both ends, the arc-shaped outer frame 44 in the lower shock-absorbing assembly is fastened and docked with the arc-shaped outer frame 44 in the upper shock-absorbing assembly, the arc-shaped inner frame 51 in the lower shock-absorbing assembly is tightly attached to the lower side of the outer wall of the valve body 1, and the upper shock-absorbing assembly is tightly attached to the upper side of the outer wall of the valve body 1. When vibration occurs, the spring four 49 plays a role of shock absorption and buffering, and the screw 46 is rotated to drive the support plate 47 to rise or fall, thereby driving and changing the degree of compression of the arc-shaped inner frame 51 on the valve body 1, and at the same time changing the shock absorption amplitude when encountering vibration, which can be adjusted according to different types of gate valves.

[0067] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A scour-resistant and corrosion-resistant gate valve, characterized in that: The invention comprises a valve body (1), a valve cover (7) is fixedly mounted on the valve body (1), a control component is arranged inside the valve cover (7), the control component controls the valve stem (10) to rotate inside the valve cover (7), the lower end of the valve stem (10) is threadedly connected to a gate plate (11), the gate plate (11) slides inside the valve body (1) and the valve cover (7), a filter component is arranged inside the valve body (1), and a support component is arranged outside the valve body (1).

2. The erosion-resistant and corrosion-resistant gate valve according to claim 1, characterized in that: The control component comprises a second bevel gear (8), which is fixed to the upper end of the valve stem (10), meshed with a first bevel gear (6) for transmission, the first bevel gear (6) is rotationally connected to the valve cover (7), a plug rod (5) is slidably connected inside the first bevel gear (6), and the plug rod (5) is fixedly connected to the rotating rod (2).

3. The erosion-resistant and corrosion-resistant gate valve according to claim 2, characterized in that: The valve cover (7) is provided with a chamber on the side, a limiting ball (4) is slidably connected in the chamber, a spring (3) is provided between the limiting ball (4) and the inner wall of the chamber, the front end of the limiting ball (4) is clamped in a groove provided on the rotating rod (2), a packing (9) is provided at the rotating connection between the valve stem (10) and the valve cover (7), and the lower end of the rotating rod (2) is tilted outward.

4. The erosion-resistant and corrosion-resistant gate valve according to claim 3, characterized in that: Two flaps (15) are rotatably connected in the gate plate (11), and torsion springs are provided at the rotatable connection points between the two flaps (15) and the gate plate (11). Two knobs (12) are rotatably connected to the upper side of the gate plate (11), and blocking rods (13) are fixed at the front ends of the two knobs (12). The front ends of the two blocking rods (13) respectively abut against the two flaps (15). Two blocking rod storage grooves (14) are provided in the gate plate (11), and a limiting groove (16), a clamping groove (17) and a blocking block (18) are provided in the valve body (1). The upper end of the filter component abuts against the blocking block (18), and the two sides of the lower end of the filter component are respectively clamped in the limiting groove (16) and the clamping groove (17).

5. The erosion-resistant and corrosion-resistant gate valve according to claim 4, characterized in that: The filter component comprises a filter screen (19), the filter screen (19) is inserted into the valve body (1) from the lower end of the valve body (1), the top of the filter screen (19) is against the side of the block (18), the boss (52) arranged at the lower end of the filter screen (19) is clamped in the clamping groove (17), and a plurality of reinforcing ribs (20) are arranged in the filter screen (19).

6. The erosion-resistant and corrosion-resistant gate valve according to claim 5, characterized in that: A connecting plate 1 (21) is fixed to one end of the filter screen (19), and a connecting plate 2 (22) is fixed to the other end of the filter screen (19). Racks are provided on the inner sides of the connecting plate 1 (21) and the connecting plate 2 (22). A center plate (25) is provided between the connecting plate 1 (21) and the connecting plate 2 (22). Two ends of the center plate (25) are respectively slidably connected to two ends of the filter screen (19). A center rod (23) is rotatably connected to the middle of the center plate (25). A gear (24) is provided on the center rod (23). Both racks are meshed with the gear (24) for transmission. An eccentric wheel (53) is rotatably connected to the center plate (25). The outer wall of the eccentric wheel (53) is pressed against the middle of the center rod (23). The eccentric wheel (53) is fixedly connected to the lever (26).

7. The erosion and corrosion resistant gate valve according to claim 6, characterized in that: A convex block (27) is provided on the side of the center plate (25), the convex block (27) is slidably connected to the side slider (28), a second spring (29) is provided between the convex block (27) and the side slider (28), a lower slider (31) is slidably connected to the lower end of the side slider (28), a third spring (30) is provided between the side slider (28) and the lower slider (31), and the side slider (28) is clamped in the limiting groove (16).

8. The erosion-resistant and corrosion-resistant gate valve according to claim 7, characterized in that: The filter screen (19) is provided with a cleaning component, which comprises a conical tube (32). The conical tube (32) is fixed to the lower end of the valve body (1). After the conical tube (32) is fixed to the valve body (1), the lower slider (31) is pressed upward, driving the spring three (30) to be compressed, and the conical tube (32) is rotatably connected to the outer tube (34). A filler two (33) is provided at the rotatable connection between the conical tube (32) and the outer tube (34). The upper end of the outer tube (34) is fixedly connected to the outer frame (35).

9. The erosion-resistant and corrosion-resistant gate valve according to claim 8, characterized in that: A turbine turntable (36) is rotatably connected inside the outer frame (35), and the turbine turntable (36) is slidably connected to three slide bars (38). The front ends of the three slide bars (38) are all fixed with arc-shaped cleaning brushes (39). The three slide bars (38) slide inside the outer frame (35). An inner tube (37) is fixed at the lower end of the turbine turntable (36), and a flow rate sensor (40) is arranged inside the inner tube (37). The detection end of the flow rate sensor (40) is located inside the valve body (1). An impurity outflow pipe (42) is fixed at the bottom of the conical tube (32), and a ball valve (41) is arranged inside the impurity outflow pipe (42).

Images