Multifunctional corrosion-resistant check valve device

Abstract

The utility model belongs to the technical field of check valves, and particularly relates to a multifunctional corrosion-resistant check valve device which comprises a valve body and a valve plate, connecting flanges are arranged at the two ends of the valve body and used for being connected with a pipeline, a sealing end face is arranged in the valve body, the surface of the valve plate is coated with a corrosion-resistant coating, and annular sealing gaskets are glued to the two sides of the valve plate to enhance the sealing performance. A boss is arranged above the valve body, a threaded rod and a sliding groove are formed in the boss, a movable block is slidably installed in the sliding groove and driven by the threaded rod to move along the axis so as to adjust the position of the valve plate to achieve two-way non-return, a drainage hole and a sealing plug are arranged at the bottom of the valve body, and the drainage hole is used for discharging internal residual liquid to prevent corrosion. Through the structural design, the problems that an existing check valve is single in function, insufficient in corrosion resistance, inconvenient to clean residual liquid and poor in opening and closing control flexibility are solved, and the check valve has the advantages of being simple in structure, convenient and fast to operate, wide in application range and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to check valve technical field, concretely relates to a multifunctional corrosion -resistant check valve device. BACKGROUND

[0002] Check valve as fluid control equipment, has important role in pipeline system, is mainly used for preventing the reverse flow of fluid in pipeline, protects the normal operation of pipeline system. The common check valve at present includes swing check valve and lift check valve, and its working principle usually is driven by fluid pressure to realize opening and closing of valve plate. However, the existing check valve has the following deficiencies:

[0003] 1. Single function

[0004] Most check valves can only control the flow of fluid in a fixed direction, and when used in pipelines that require bidirectional transportation, there is a problem of insufficient applicability. Additional devices need to be installed to achieve flow direction conversion, increasing system complexity.

[0005] 2. Insufficient corrosion resistance

[0006] In the pipeline conveying corrosive media, the internal structure of the check valve, especially the valve plate, is prone to corrosion by the medium, reducing the service life of the check valve. Although some corrosion-resistant materials are used in existing technologies, the overall corrosion resistance of the structure still needs to be improved.

[0007] 3. Liquid residue cleaning is inconvenient

[0008] After the pipeline stops running, liquid often remains inside the valve body. These liquids can cause corrosion of the inner wall of the valve body, especially when conveying corrosive fluids. However, the existing check valve lacks a convenient drainage function, and the cleaning operation is complex and costly to maintain.

[0009] 4. Poor opening and closing control flexibility

[0010] The valve plate of some check valves is driven by fluid pressure, and cannot be flexibly adjusted according to the needs of different fluid pressure conditions, resulting in more limitations in actual application and difficulty in meeting the use requirements of various scenarios.

[0011] In summary, the current check valve device has the problems of single function, insufficient corrosion resistance, difficult drainage and poor opening and closing adjustment flexibility. These problems limit the widespread application of check valves in complex working conditions. INVENTION CONTENTS

[0012] In view of the problems in the prior art, the utility model discloses a multifunctional corrosion -resistant check valve device, it can realize, can pass through the position of valve plate adjustment of bidirectional fluid's delivery, realizes multifunctional check, and has excellent corrosion -resistant performance, convenient liquid discharge structure and flexible open -close regulation function simultaneously, to promote its adaptability and reliability in practical use.

[0013] To realize above-mentioned purpose, the utility model provides following technical scheme:

[0014] A multifunctional corrosion -resistant check valve device, including valve body and valve plate, the valve plate is placed in the valve body interior, the valve body interior is hollow both ends open, the valve body both ends are provided with the connecting flange, the valve body interior is provided with the symmetrical sealing end face, the valve body upper surface is provided with the boss along the axis, the boss inboard is provided with the sliding slot, the sliding slot is through with the valve body interior, the boss upper surface is installed with the transparent observation window, the boss interior is rotatably installed with the threaded rod, the threaded rod is parallel with the valve body axis, the threaded rod one end penetrates the boss, the threaded rod end is provided with the knob, the knob is placed in the boss outboard, the sliding slot interior is slidably installed with the moving block, the moving block is screwed on the threaded rod, the moving block bottom is provided with the symmetrical lower extension plate, the valve plate top is hinged between two lower extension plates, the valve plate is placed between two sealing end faces, the valve plate surface is coated with the corrosion -resistant coating.

[0015] Further, the valve plate both sides surface are glued in annular sealing gasket, two annular sealing gaskets correspond with two sealing end faces respectively.

[0016] Further, the valve body center lower surface is provided with the drain hole, the drain hole inboard is screwed with the sealing plug.

[0017] Further, the valve body surface below is provided with the symmetrical screwing installation adjustment bolt, two adjustment bolts are placed in the sealing end face inboard below respectively, the adjustment bolt axis is perpendicular.

[0018] Further, the adjustment bolt upper end surface is provided with the mounting hole, the mounting hole interior is slidably installed with the extrusion ball head, the extrusion ball head penetrates the adjustment bolt end, the valve plate bottom center is provided with the positioning hole that is mutually adapted with the extrusion ball head end.

[0019] Further, the mounting hole interior is placed with the spring, and the spring end is in contact with the extrusion ball head one end surface.

[0020] Compared with the prior art, the utility model has the advantages of:

[0021] The multifunctional corrosion-resistant check valve device provided by the application solves the problem of single function of the existing check valve through the design of adjusting the position of the valve plate when bidirectional fluid conveying is performed. Through the precise cooperation of the valve plate and the sealing end face and the flexible adjustment of the moving block and the threaded rod, the device can flexibly adjust the position of the valve plate according to different conveying directions, and realize the bidirectional check function. This design simplifies the structure of the pipeline system, improves the application range of the check valve, and significantly improves the flexibility of the fluid conveying system.

[0022] The valve plate of the device is made of high-strength titanium alloy material coated with a corrosion-resistant coating on the surface, and annular sealing pads made of polytetrafluoroethylene are glued on both surfaces to tightly cooperate with the sealing end face, thereby improving the corrosion resistance and sealing effect of the valve plate. Combined with the overall structure of the high-strength stainless steel valve body, the device can maintain a high-efficiency and stable operating state for a long time when conveying corrosive media, thereby prolonging the service life of the device and overcoming the problem of insufficient corrosion resistance in the prior art.

[0023] The device is provided with a drain hole at the bottom of the valve body and a sealing plug structure, which can quickly clean the residual liquid in the valve body through simple screwing operation, prevent the residual liquid from corroding the inner wall of the valve body, and improve the maintenance convenience of the device.

[0024] Through the combined design of the adjusting bolt, the extruded ball head and the compression spring, the device can flexibly adjust the opening and closing pressure of the valve plate to adapt to different fluid pressure conditions. The precise cooperation of the extruded ball head and the positioning hole of the valve plate ensures the stability of the closed state of the valve plate, and the adjusting bolt can adjust the compression degree of the spring according to the requirements to meet the use requirements in multiple scenes. Compared with the poor opening and closing control flexibility of the existing check valve, the present application greatly improves the adjustment accuracy and reliability of the device.

[0025] In summary, the multifunctional corrosion-resistant check valve device of the application solves the problems of single function, insufficient corrosion resistance, inconvenient residual liquid cleaning and poor opening and closing control flexibility in the prior art through the above technical solutions, and significantly improves the applicability, reliability and service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the present application;

[0028] Figure 3 It is a schematic diagram of the internal structure of the present application;

[0029] Figure 4 It is a schematic diagram of the adjusting bolt structure of the present application;

[0030] Figure 5For the present utility model Figure 2 A magnified structural diagram of area A;

[0031] Figure 6 This is a schematic diagram of the installation structure of the moving block and valve plate of this utility model.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Valve body; 11. Sealing end face; 12. Drain hole; 2. Connecting flange; 3. Boss; 31. Slide groove; 32. Transparent observation window; 4. Threaded rod; 41. Knob; 5. Moving block; 51. Lower extension plate; 6. Valve plate; 61. Annular sealing gasket; 62. Positioning hole; 7. Sealing plug; 8. Adjusting bolt; 81. Mounting hole; 9. Extrusion ball head; 10. Spring. Detailed Implementation

[0034] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0035] refer to Figures 1-4As shown, a multifunctional corrosion-resistant check valve device includes a valve body 1 and a valve plate 6. The valve body 1 is made of high-strength stainless steel to enhance its overall corrosion resistance and improve its service life in harsh environments. The valve body 1 is hollow inside and open at both ends to facilitate bidirectional fluid flow. Both ends of the valve body 1 are fixed with standard DN150 connecting flanges 2 by welding for easy sealing connection with pipelines. Two symmetrical sealing end faces 11 made of fluororubber are arranged inside the valve body 1 to improve the sealing performance of the device. A rectangular boss 3 is integrally cast on the upper surface of the valve body 1 along the axial direction. A groove 31 extending along the axial direction of the valve body 1 is opened on the inner side of the boss 3. The groove 31 communicates with the internal space of the valve body 1 to guide the linear movement of the sliding parts. A transparent observation window 32 made of high-strength transparent plexiglass is bolted to the upper surface of the boss 3. The transparent observation window 32 facilitates observation of the operating status of the valve plate 6 and the flow of the internal liquid. An 316L stainless steel threaded rod 4 with an outer diameter of 20mm is rotatably installed inside the slide groove 31. The threaded rod 4 is parallel to the axis of the valve body 1. One end of the threaded rod 4 passes through the boss 3 and extends to the outside of the boss 3. The end of the threaded rod 4 is provided with a 50mm diameter anti-slip knob 41. The knob 41 is located outside the boss 3 for easy adjustment by manual rotation. A moving block 5 made of high-strength nylon is slidably installed inside the slide groove 31. The moving block 5 is helically connected to the threaded rod 4 through an internal thread, so that it can move linearly along the slide groove 31 as the threaded rod 4 rotates. Two lower extension plates 51 are symmetrically arranged at the bottom of the moving block 5. The lower extension plates 51 are connected to the top two ends of the valve plate 6 by high-precision hinges. The valve plate 6 is fixed between the two lower extension plates 51 by hinges and is located between the two sealing end faces 11. The valve plate 6 is made of high-strength titanium alloy and its surface is uniformly coated with a 0.5mm thick corrosion-resistant coating to enhance its resistance to corrosive media.

[0036] refer to Figure 6 As shown, both sides of the valve plate 6 are glued and fixed with annular sealing gaskets 61 by industrial-grade adhesive; both annular sealing gaskets 61 are made of polytetrafluoroethylene material and correspond to the two sealing end faces 11 respectively, ensuring that the fluid will not leak when the valve plate 6 is closed.

[0037] refer to Figure 2 and Figure 3 As shown, a drain hole 12 with a diameter of 10mm is provided on the lower surface of the center of the valve body 1. A sealing plug 7 is threaded inside the drain hole 12. The sealing plug 7 is made of high-strength nitrile rubber and can effectively seal the drain hole 12 under normal conditions to prevent residual liquid inside the valve body 1 from corroding its inner wall when the pipeline stops running. When it is necessary to clean the residual liquid inside, the residual liquid can be discharged from the drain hole 12 by unscrewing the sealing plug 7.

[0038] refer to Figure 2 and Figure 3 As shown, two adjusting bolts 8 with a diameter of 15mm are screwed on symmetrically below the outer surface of the valve body 1. The axes of the two adjusting bolts 8 are perpendicular to the lower surface of the valve body 1 and are located below the inner side of the two sealing end faces 11 respectively. The adjusting bolts 8 are made of stainless steel and can withstand large mechanical pressure. The ends of the adjusting bolts 8 are fixedly connected to the valve body 1 through a threaded structure and have an adjustment function.

[0039] refer to Figure 3 and Figure 5 As shown, the upper end face of the adjusting bolt 8 has a mounting hole 81 with a diameter of 8mm; a compression ball head 9 is slidably installed inside the mounting hole 81. The compression ball head 9 is made of high-hardness carbon steel and is chrome-plated to enhance wear resistance; the end of the compression ball head 9 passes through the adjusting bolt 8 and is matched with the positioning hole 62 opened at the bottom center of the valve plate 6 to provide stable support force when the valve plate 6 is closed.

[0040] refer to Figure 4 and Figure 5 As shown, a compression spring 10 with a length of 20mm is placed inside the mounting hole 81. The spring 10 is made of high-temperature resistant stainless steel, and its end is in contact with one end surface of the extrusion ball head 9. The spring 10 keeps the extrusion ball head 9 under upward pressure through its elastic force, thereby providing a reliable locking effect when the valve plate 6 is in the closed state. At the same time, the compression degree of the spring 10 can be adjusted by rotating the adjusting bolt 8 to flexibly control the opening pressure of the valve plate 6, thereby adapting to different fluid transportation needs.

[0041] The working principle of this utility model is as follows: The check valve is installed in the pipeline through the connecting flanges 2 on both sides. Then, due to its own weight, the valve plate 6 is always in a vertical downward state. The position of the valve plate 6 is adjusted according to the direction of water flow in the pipeline. At this time, the threaded rod 4 can be rotated by the knob 41 on the outside, which in turn drives the moving block 5 to move along the axis of the valve body 1 to adjust the position of the valve plate 6 so that the valve plate 6 is close to the sealing end face 11 on the water inlet side. When the moving block 5 moves to the end, the annular sealing gasket 61 is tightly fitted with the sealing end face 11 of the water inlet. At this time, it can play the role of reverse water stop. Therefore, it can be applied to bidirectional conveying pipelines to adjust the position of the valve plate 6 according to different conveying directions, improve the flexibility of the check valve, realize multiple functions, and coat the surface of the valve plate 6 with a corrosion-resistant coating to improve the corrosion resistance.

[0042] A drain hole 12 is provided at the center of the bottom of the valve body 1. The drain hole 12 is normally blocked by the sealing plug 7. When not in use, the sealing plug 7 can be opened to allow the liquid remaining inside the valve body 1 to drain through the drain hole 12, so as to prevent the liquid from corroding the inner wall of the valve body 1. Due to the presence of the spring 10, the extrusion ball head 9 has an upward force. When the valve plate 6 is closed, it can be fixed by the cooperation between the extrusion ball head 9 and the positioning hole 62. The cooperation force between the extrusion ball head 9 and the positioning hole 62 can be controlled by screwing the adjusting bolt 8, thereby adjusting the pressure required for the valve plate 6 to open. When the valve plate 6 is under pressure, it will rotate and form a shear force with the end of the extrusion ball head 9, so that the extrusion ball head 9 moves into the mounting hole 81 to open. Alternatively, the adjusting bolt 8 can be rotated to make the extrusion ball head 9 completely squeeze into the positioning hole 62, so that the valve plate 6 remains closed, thereby improving the flexibility of the device during use.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A multifunctional corrosion-resistant check valve device, comprising a valve body (1) and a valve plate (6), wherein the valve plate (6) is disposed inside the valve body (1), characterized in that... The valve body (1) is hollow inside with open ends. Both ends of the valve body (1) are provided with connecting flanges (2). The valve body (1) has symmetrically arranged sealing end faces (11). A boss (3) is provided on the upper surface of the valve body (1) along its axis. A sliding groove (31) is provided inside the boss (3), and the sliding groove (31) communicates with the interior of the valve body (1). A transparent observation window (32) is installed on the upper surface of the boss (3). A threaded rod (4) is rotatably installed inside the boss (3), and the threaded rod (4) is parallel to the axis of the valve body (1). One end of the threaded rod (4) passes through the boss (3). A knob (41) is provided at the end of the threaded rod (4). The knob (41) is located outside the boss (3). A movable block (5) is slidably installed inside the slide groove (31). The movable block (5) is screwed onto the threaded rod (4). A lower extension plate (51) is symmetrically arranged at the bottom of the movable block (5). The top of the valve plate (6) is hinged between the two lower extension plates (51). The valve plate (6) is placed between the two sealing end faces (11). The surface of the valve plate (6) is coated with a corrosion-resistant coating.

2. The multifunctional corrosion-resistant check valve device according to claim 1, characterized in that: Both sides of the valve plate (6) are glued to annular sealing gaskets (61), and the two annular sealing gaskets (61) correspond to the two sealing end faces (11) respectively.

3. The multifunctional corrosion-resistant check valve device according to claim 1, characterized in that: The valve body (1) has a drain hole (12) on its lower center surface, and a sealing plug (7) is screwed into the drain hole (12) for sealing.

4. The multifunctional corrosion-resistant check valve device according to claim 1, characterized in that: The valve body (1) is symmetrically screwed on with adjusting bolts (8) below the surface. The two adjusting bolts (8) are respectively placed below the inner side of the sealing end face (11), and the axis of the adjusting bolts (8) is set vertically.

5. A multifunctional corrosion-resistant check valve device according to claim 4, characterized in that: The upper end face of the adjusting bolt (8) is provided with a mounting hole (81), and a compression ball head (9) is slidably installed inside the mounting hole (81). The compression ball head (9) passes through the end of the adjusting bolt (8), and a positioning hole (62) adapted to the end of the compression ball head (9) is provided at the bottom center of the valve plate (6).

6. A multifunctional corrosion-resistant check valve device according to claim 5, characterized in that: A spring (10) is placed inside the mounting hole (81), and the end of the spring (10) is in contact with the surface of one end of the extrusion ball (9).

Images