Anti-reflux flow controller

Abstract

The invention discloses an anti-reflux flow controller which comprises a valve body, a water inlet pipe and a water outlet pipe, and further comprises a water outlet arranged at the joint of the water outlet pipe and the valve body; the baffle is arranged between the top and the bottom of the inner wall of the water outlet; the two limiting blocks are respectively fixed at the top and the bottom of the inner wall of the water outlet; the support is fixedly connected to one side of the water outlet, the support comprises a vertical plate, and transverse plates are fixedly connected to the top and the bottom of one side of the vertical plate. According to the anti-reflux flow controller, when pipeline fluid flows forwards, the fluid impacts the baffle in the water outlet, water can be discharged normally after the baffle moves out of the water outlet, the baffle is limited by the elliptical sphere and the support, and when the situation of reverse flow occurs, the baffle is impacted reversely and enters the water outlet, so that the water outlet is blocked, the fluid is prevented from flowing reversely, and the flow rate of the pipeline is increased. Normal operation of a pipeline system is guaranteed, and equipment is prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of flow control, in particular to an anti-backflow flow controller. Background Art

[0002] A flow controller is a device specially used to monitor, adjust and control the flow of liquid or gas. It can stabilize the flow within a certain range by adjusting the fluid and realize automatic control. The flow controller is also known as self-operated flow control valve, flow balancing valve and static balancing valve. It is an intuitive and simple flow regulation control device. The flow regulating valve used in the pipeline network can directly set the flow according to the design.

[0003] A valve flow controller with reference patent application number CN202321337131.X, a circular baffle is fixedly installed outside the rotating rod and inside the pipe, the diameter of the circular baffle is equal to the inner diameter of the pipe, the rotating rod can drive the circular baffle to rotate, and the rotation of the circular baffle can accurately adjust and control the flow inside the water pipe, so as to better control the amount of water discharged;

[0004] The flow controller of the above patent is installed horizontally. Under normal conditions, the pipeline pressure difference causes the flow controller to transport in the forward direction. However, when the pressure in the pipeline is not stable enough, the fluid is prone to reverse flow, affecting the normal operation of the pipeline system and even damaging the equipment. At the same time, in the process of transporting the liquid, impurities in the transport medium cannot be filtered. Long-term flushing can easily cause damage to the internal valve core and affect the flow detection accuracy. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides an anti-backflow flow controller, which solves the problem that when the pressure in the pipeline is not stable enough, the fluid is prone to reverse flow and impurities in the conveying medium cannot be filtered, and long-term flushing can easily cause damage to the internal valve core.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flow controller for preventing backflow, comprising a valve body, a water inlet pipe and a water outlet pipe, and also comprising:

[0009] A water outlet is arranged at the connection between the water outlet pipe and the valve body;

[0010] A baffle plate is arranged between the top and the bottom of the inner wall of the water outlet;

[0011] Two limit blocks are respectively fixed on the top and bottom of the inner wall of the water outlet;

[0012] A bracket, fixedly connected to one side of the water outlet, the bracket comprising a vertical plate, and a horizontal plate is fixedly connected to the top and bottom of one side of the vertical plate;

[0013] An ellipsoidal sphere is fixed to one side of the vertical plate through a connecting block, and the ellipsoidal sphere is used to limit the baffle;

[0014] The filter screen is arranged inside the water inlet pipe through a locking assembly, and the locking assembly is used for loading and unloading the filter screen.

[0015] Preferably, the locking assembly includes a fixed plate and two rotating plates, the outer surface of the water inlet pipe is provided with two arc plates, the top and bottom of the two arc plates are fixedly connected with convex plates, the opposite sides of the two arc plates are fixedly connected with sealing plates, a movable groove is provided on the side of the rotating plate away from the fixed plate, and a movable plate is slidably connected between the two sides of the inner wall of the movable groove, a spring is fixedly connected between the bottom of the movable plate and the inner wall of the movable groove, a clamping rod is fixedly connected on the side of the movable plate away from the spring, a fixed block is fixedly connected to the surface of the convex plate, and a clamping groove matching the clamping rod is provided at the bottom of the fixed block.

[0016] Preferably, the filter screen is fixed on a side of the sealing plate away from the arc plate, both sides of the fixed plate penetrate the convex plate and extend to the outside of the convex plate, and the two ends of the fixed plate extending to the outside of the convex plate are respectively hinged to two rotating plates.

[0017] Preferably, the water inlet pipe is connected to one side of the valve body, and the water outlet pipe is connected to the other side of the valve body. A valve core is slidably arranged between the two sides of the inner wall of the valve body, and a valve stem is fixedly connected to the top of the valve core. The top of the valve body is threadably connected to the valve seat by bolts, and the top of the valve stem passes through the valve body and extends to the inside of the valve seat.

[0018] Preferably, the surface of the valve body is fixedly connected to an electric telescopic rod via a support rod, and one end of an output shaft of the electric telescopic rod is fixedly connected to the top end of the valve stem.

[0019] Preferably, a sealing sleeve is fixedly connected between the top of the valve seat and the bottom of the electric telescopic rod.

[0020] Preferably, mounting grooves are provided on both sides of the inner wall of the valve body, and a mounting plate is fixedly connected to the inner wall of the mounting groove, a sponge is fixedly connected to one side of the mounting plate, and a side of the sponge away from the mounting plate is in contact with the surface of the valve stem, and oil inlet pipes are passed through both sides of the valve body, and an oil storage assembly is provided at the oil inlet end of the oil inlet pipe.

[0021] Preferably, the oil storage assembly includes an oil storage barrel, the top of which is fixedly connected to a cylinder, and one end of the cylinder output shaft is fixedly connected to a piston rod, and a piston fixedly connected to the bottom end of the piston rod is slidably arranged between both sides of the inner wall of the oil storage barrel.

[0022] Preferably, both sides of the piston rod are fixedly connected with sliding rods slidably arranged with the inner wall of the oil storage cylinder, the oil inlet end of the oil inlet pipe is connected to the bottom of one side of the oil storage cylinder, and the end of the oil inlet pipe away from the oil storage cylinder sequentially passes through the valve body and the mounting plate and extends to the interior of the sponge.

[0023] (III) Beneficial effects

[0024] The present invention provides a flow controller for preventing backflow, which has the following beneficial effects:

[0025] (1) In the anti-backflow flow controller, when the pipeline fluid flows forward, the fluid impacts the baffle in the water outlet. After the baffle moves out of the water outlet, water can be discharged normally. The ellipsoidal sphere and the bracket limit the baffle. When reverse flow occurs, the baffle is impacted in the reverse direction and enters the water outlet, thereby blocking the water outlet and preventing the fluid from flowing in the reverse direction, thereby ensuring the normal operation of the pipeline system and avoiding damage to the equipment.

[0026] (2) The anti-backflow flow controller filters impurities and other particles in the liquid by setting a filter inside the water inlet pipe to prevent impurities and other particles from entering the valve body, thereby avoiding corrosion of the internal components of the valve body or clogging of the valve body. The two arc plates can be loaded and unloaded through the locking assembly, thereby facilitating the removal of the filter from the water inlet pipe for cleaning without the need for external special tools, making cleaning simpler and faster.

[0027] (3) In the anti-backflow flow controller, when the electric telescopic rod drives the valve stem to move up and down, the sealing sleeve can prevent dust and the like from adhering to the valve stem. At the same time, the cylinder drives the piston to move downward. Under the squeezing of the piston, the lubricating oil in the oil storage cylinder is driven to penetrate the sponge through the oil inlet pipe. When the valve stem moves up and down, the sponge automatically lubricates the valve stem, thereby reducing the friction of the valve stem when it moves, slowing down the wear, and ensuring the flexible use of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of the structure of the present invention;

[0029] Figure 2 is a cross-sectional view of the structure of the present invention;

[0030] Figure 3 is a cross-sectional view of the water outlet pipe structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the baffle and ellipsoid structure of the present invention;

[0032] Figure 5 It is a side view of the filter structure of the present invention;

[0033] Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A;

[0034] Figure 7 It is a schematic diagram of the installation of the rotating plate and the fixed block structure of the present invention;

[0035] Figure 8 A top view of the sponge structure of the present invention;

[0036] Fig. 9 It is a cross-sectional view of the oil storage cylinder structure of the present invention.

[0037] In the figure: 1. valve body; 2. water inlet pipe; 3. water outlet pipe; 4. water outlet; 5. baffle; 6. limit block; 7. bracket; 71. vertical plate; 72. horizontal plate; 8. ellipsoid; 9. filter screen; 10. fixed plate; 11. rotating plate; 12. arc plate; 13. convex plate; 14. sealing plate; 15. movable groove; 16. movable plate; 17. spring; 18. clamping rod; 19. fixed block; 20. clamping groove; 21. valve core; 22. valve stem; 23. valve seat; 24. electric telescopic rod; 25. sealing sleeve; 26. mounting groove; 27. mounting plate; 28. sponge; 29. ​​oil inlet pipe; 30. oil storage cylinder; 31. cylinder; 32. piston rod; 33. piston; 34. sliding rod. DETAILED DESCRIPTION

[0038] 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.

[0039] Embodiment 1

[0040] See also Figures 1 to 4 As shown, the present invention provides an anti-backflow flow controller, comprising a valve body 1, a water inlet pipe 2 and a water outlet pipe 3, and also comprising:

[0041] The water outlet 4 is arranged at the connection between the water outlet pipe 3 and the valve body 1;

[0042] The baffle plate 5 is arranged between the top and the bottom of the inner wall of the water outlet 4, and the baffle plate 5 can move between the limit block 6 and the ellipsoid 8;

[0043] Two limit blocks 6 are respectively fixed at the top and bottom of the inner wall of the water outlet 4. When the baffle 5 is impacted in the reverse direction and re-enters the water outlet 4, the limit blocks 6 limit the baffle 5, thereby blocking the water outlet 4 to prevent the fluid from flowing in the reverse direction and ensure the normal operation of the pipeline system.

[0044] The bracket 7 is fixedly connected to one side of the water outlet 4. The bracket 7 includes a vertical plate 71. The top and bottom of one side of the vertical plate 71 are fixedly connected to a horizontal plate 72. The horizontal plate 72 is fixed to the valve body 1. When the baffle 5 moves out of the water outlet 4, it slides between the two horizontal plates 72, which can prevent the baffle 5 from moving up and down, and the moving position is more accurate.

[0045] The ellipsoid 8 is fixed to one side of the vertical plate 71 through a connecting block, and the ellipsoid 8 is used to limit the baffle 5;

[0046] The filter screen 9 is arranged inside the water inlet pipe 2 through a locking assembly, and the locking assembly is used to load and unload the filter screen 9. The filter screen 9 is a circular filter element composed of two semicircular filter plates;

[0047] The water inlet pipe 2 is connected to one side of the valve body 1, and the water outlet pipe 3 is connected to the other side of the valve body 1. A valve core 21 is slidably arranged between the two sides of the inner wall of the valve body 1. The valve core 21 is used to seal the water inlet and the water outlet 4, or after the valve core 21 moves upward, the water inlet and the water outlet 4 can be opened, and the top of the valve core 21 is fixedly connected with a valve stem 22, and the top of the valve body 1 is threadedly connected with a valve seat 23 by bolts. The top of the valve stem 22 penetrates the valve body 1 and extends to the inside of the valve seat 23. The surface of the valve body 1 is fixedly connected with an electric telescopic rod 24 through a support rod, and the electric telescopic rod 24 is fixedly connected to the surface of the valve body 1 through a support rod. One end of the output shaft of the rod 24 is fixedly connected to the top of the valve stem 22. The setting of the electric telescopic rod 24 can drive the valve core 21 to move up and down, and adjust the exposed size of the water inlet and the water outlet 4, so as to control the flow rate. A sealing sleeve 25 is fixedly connected between the top of the valve seat 23 and the bottom of the electric telescopic rod 24. The setting of the sealing sleeve 25 prevents dust and other impurities from adhering to the surface of the valve stem 22 during the process of the electric telescopic rod 24 driving the valve stem 22 to move up and down. A flow meter is also provided on the top of the valve body 1 for displaying the fluid flow in real time.

[0048] Embodiment 2

[0049] Based on Example 1, please refer to Figure 1 and Figures 5 to 7As shown, the locking assembly includes a fixed plate 10 and two rotating plates 11. Two arc plates 12 are arranged on the outer surface of the water inlet pipe 2. The arc plates 12 are adapted to the shape of the water inlet pipe 2. The tops and bottoms of the two arc plates 12 are fixedly connected with convex plates 13. The opposite sides of the two arc plates 12 are fixedly connected with sealing plates 14. A through groove adapted to the sealing plate 14 is provided on the surface of the water inlet pipe 2. A sealing gasket is provided at the connection between the sealing plate 15 and the through groove to prevent pipeline leakage. The filter screen 9 is fixed on the side of the sealing plate 14 away from the arc plate 12. A movable groove 15 is provided on the side of the rotating plate 11 away from the fixed plate 10, and a movable plate 16 is slidably connected between the two sides of the inner wall of the movable groove 15. The bottom of the movable plate 16 is connected to the inner wall of the movable groove 15. A spring 17 is fixedly connected between the two arc plates 12, and a clamping rod 18 is fixedly connected to the side of the movable plate 16 away from the spring 17. A fixing block 19 is fixedly connected to the surface of the convex plate 13, and a clamping groove 20 adapted to the clamping rod 18 is provided at the bottom of the fixing block 19. After the clamping rod 18 enters the clamping groove 20, the two arc plates 12 can be locked on the water inlet pipe 2, thereby fixing the filter screen 9 in the water inlet pipe 2. Conversely, after the two arc plates 12 are disassembled, the two semicircular filter plates of the filter screen 9 are respectively pulled out of the water inlet pipe 2 through the two arc plates 12, so that the filter screen 9 can be easily taken out for cleaning. Both sides of the fixed plate 10 penetrate the convex plate 13 and extend to the outside of the convex plate 13. The two ends of the fixed plate 10 extending to the outside of the convex plate 13 are respectively hinged to the two rotating plates 11.

[0050] Embodiment 3

[0051] In conjunction with Example 1 and Example 2, please refer to Figure 1 , Figure 2 and Figure 8 and Fig. 9As shown, mounting grooves 26 are provided on both sides of the inner wall of the valve body 1, and a mounting plate 27 is fixedly connected to the inner wall of the mounting groove 26, a sponge 28 is fixedly connected to one side of the mounting plate 27, and the side of the sponge 28 away from the mounting plate 27 is in contact with the surface of the valve stem 22, and an oil inlet pipe 29 is passed through both sides of the valve body 1, an electromagnetic valve is arranged inside the oil inlet pipe 29, and an oil storage assembly is arranged at the oil inlet end of the oil inlet pipe 29, and the oil storage assembly includes an oil storage cylinder 30, and lubricating oil is stored in the oil storage cylinder 30, and a cylinder 31 is fixedly connected to the top of the oil storage cylinder 30, and a piston rod 32 is fixedly connected to one end of the output shaft of the cylinder 31, and the storage A piston 33 fixedly connected to the bottom end of the piston rod 32 is slidably provided between the two sides of the inner wall of the oil cylinder 30. The cylinder 31 drives the piston 33 to move downward. After the inside of the oil storage cylinder 30 is pressurized, the lubricating oil flows to the sponge 28 through the oil inlet pipe 29 to soak the sponge 28. Both sides of the piston rod 32 are fixedly connected with sliding rods 34 slidably provided on the inner wall of the oil storage cylinder 30. The sliding rods 34 improve the stability of the piston 33 when moving. The oil inlet end of the oil inlet pipe 29 is connected to the bottom of one side of the oil storage cylinder 30. The end of the oil inlet pipe 29 away from the oil storage cylinder 30 passes through the valve body 1 and the mounting plate 27 in sequence and extends to the inside of the sponge 28.

[0052] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment compatible with the equipment can be used.

[0053] When in use, the electric telescopic rod 24 drives the valve stem 22 to move upward, and the valve stem 22 drives the valve core 21 to move accordingly, exposing the water inlet and the water outlet 4. The size of the water inlet and the water outlet 4 exposed can control the size of the flow rate. After the fluid enters the valve body 1 through the water inlet pipe 2, it impacts the baffle 5 in the water outlet 4, and drives the baffle 5 to move out of the water outlet 4, and then the water can be discharged normally. The ellipsoidal sphere 8 and the bracket 7 limit the baffle 5. When reverse flow occurs, the baffle 5 is impacted in the reverse direction and re-enters the water outlet 4. The limit block 6 limits the baffle 5, thereby blocking the water outlet 4 to prevent the fluid from flowing in the opposite direction, thereby ensuring the normal operation of the pipeline system.

[0054] When the pipeline liquid flows through the water inlet pipe 2, impurities and other particles in the liquid are filtered through the filter screen 9. By moving the clamping rods 18 before and after the convex plate 13 into the rotating plate 11, the clamping rods 18 squeeze the springs 17, and after the clamping rods 18 are moved out of the fixing block 19, the rotating plate 11 can be rotated downward by ninety degrees to be flush with the fixing plate 10, and then the fixing plate 10 is pulled out from between the two convex plates 13, and the fixation between the two arc plates 12 is released, so that the arc plate 12 can be driven to move out of the water inlet pipe 2, and the arc plate 12 drives the filter screen 9 to move out of the water inlet pipe 2, so that the filter screen 9 can be cleaned easily, and the operation is simple and quick.

[0055] When the electric telescopic rod 24 drives the valve stem 22 to move up and down, the sealing sleeve 25 prevents dust and other impurities from adhering to the surface of the valve stem 22, and then being brought into the valve body 1 by the valve stem 22. By starting the cylinder 31, the piston 33 is driven to move downward, and the inside of the oil storage cylinder 30 is pressurized. Under the action of pressure, the lubricating oil in the oil storage cylinder 30 enters the sponges 28 on both sides through the two oil inlet pipes 29. After the lubricating oil soaks the sponge 28, the sponge 28 lubricates the surface of the valve stem 22 that moves up and down, thereby reducing the friction when the valve stem 22 moves and slowing down the wear.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow controller for preventing backflow, comprising a valve body (1), a water inlet pipe (2) and a water outlet pipe (3), characterized in that: Also includes: A water outlet (4) is arranged at the connection between the water outlet pipe (3) and the valve body (1); A baffle (5) is arranged between the top and bottom of the inner wall of the water outlet (4); Two limit blocks (6) are respectively fixed on the top and bottom of the inner wall of the water outlet (4); A bracket (7) is fixedly connected to one side of the water outlet (4), wherein the bracket (7) comprises a vertical plate (71), and a horizontal plate (72) is fixedly connected to the top and bottom of one side of the vertical plate (71); An ellipsoid (8) is fixed to one side of the vertical plate (71) via a connecting block, and the ellipsoid (8) is used to limit the baffle (5); The filter screen (9) is arranged inside the water inlet pipe (2) via a locking assembly, and the locking assembly is used to load and unload the filter screen (9).

2. The anti-backflow flow controller according to claim 1, characterized in that: The locking assembly comprises a fixed plate (10) and two rotating plates (11); the outer surface of the water inlet pipe (2) is provided with two arc-shaped plates (12); the top and bottom of the two arc-shaped plates (12) are fixedly connected with a convex plate (13); the opposite sides of the two arc-shaped plates (12) are fixedly connected with a sealing plate (14); a movable groove (15) is provided on the side of the rotating plate (11) away from the fixed plate (10); a movable plate (16) is slidably connected between the two sides of the inner wall of the movable groove (15); a spring (17) is fixedly connected between the bottom of the movable plate (16) and the inner wall of the movable groove (15); a clamping rod (18) is fixedly connected to the side of the movable plate (16) away from the spring (17); a fixed block (19) is fixedly connected to the surface of the convex plate (13); and a clamping groove (20) adapted to the clamping rod (18) is provided on the bottom of the fixed block (19).

3. The anti-backflow flow controller according to claim 2, characterized in that: The filter screen (9) is fixed on a side of the sealing plate (14) away from the arc-shaped plate (12); both sides of the fixed plate (10) penetrate the convex plate (13) and extend to the outside of the convex plate (13); and the two ends of the fixed plate (10) extending to the outside of the convex plate (13) are respectively hinged to the two rotating plates (11).

4. The anti-backflow flow controller according to claim 1, characterized in that: The water inlet pipe (2) is connected to one side of the valve body (1), and the water outlet pipe (3) is connected to the other side of the valve body (1). A valve core (21) is slidably arranged between the two sides of the inner wall of the valve body (1), and the top of the valve core (21) is fixedly connected to a valve stem (22). The top of the valve body (1) is threadedly connected to a valve seat (23) via bolts, and the top of the valve stem (22) passes through the valve body (1) and extends to the inside of the valve seat (23).

5. The anti-backflow flow controller according to claim 4, characterized in that: The surface of the valve body (1) is fixedly connected to an electric telescopic rod (24) via a support rod, and one end of an output shaft of the electric telescopic rod (24) is fixedly connected to the top end of the valve stem (22).

6. The anti-backflow flow controller according to claim 5, characterized in that: A sealing sleeve (25) is fixedly connected between the top of the valve seat (23) and the bottom of the electric telescopic rod (24).

7. The anti-backflow flow controller according to claim 4, characterized in that: Both sides of the inner wall of the valve body (1) are provided with mounting grooves (26), and the inner wall of the mounting groove (26) is fixedly connected to a mounting plate (27), one side of the mounting plate (27) is fixedly connected to a sponge (28), and the side of the sponge (28) away from the mounting plate (27) is in contact with the surface of the valve stem (22), and both sides of the valve body (1) are penetrated by an oil inlet pipe (29), and the oil inlet end of the oil inlet pipe (29) is provided with an oil storage assembly.

8. The anti-backflow flow controller according to claim 7, characterized in that: The oil storage assembly comprises an oil storage barrel (30), the top of the oil storage barrel (30) is fixedly connected to a cylinder (31), one end of an output shaft of the cylinder (31) is fixedly connected to a piston rod (32), and a piston (33) fixedly connected to the bottom end of the piston rod (32) is slidably arranged between two sides of the inner wall of the oil storage barrel (30).

9. The anti-backflow flow controller according to claim 8, characterized in that: Both sides of the piston rod (32) are fixedly connected with sliding rods (34) slidably arranged with the inner wall of the oil storage cylinder (30), the oil inlet end of the oil inlet pipe (29) is connected to the bottom of one side of the oil storage cylinder (30), and the end of the oil inlet pipe (29) away from the oil storage cylinder (30) passes through the valve body (1) and the mounting plate (27) in sequence and extends to the interior of the sponge (28).

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