Large-diameter high-pressure check valve

Abstract

The utility model discloses a large-diameter high-pressure check valve, and relates to the field of check valves. The device comprises a large-diameter check valve, a swing check assembly is rotationally connected into the large-diameter check valve and comprises a main valve clack, an arc-shaped cavity is formed in the main valve clack, a second valve clack is rotationally connected into the arc-shaped cavity, a supporting block is fixedly connected to the back of the second valve clack, and the arc-shaped cavity is formed in the outer surface of the lower end of the main valve clack. The opening directions of the main valve clack and the second valve clack are the same. According to the large-diameter high-pressure check valve, the second small valve clack is clamped at the bottom of the swing type main valve clack, so that when the large-diameter high-pressure check valve encounters small water pressure and small flow in a pipeline, water flows out of the second valve clack, the pipeline blockage probability is reduced, and the large-diameter high-pressure check valve can better ensure that the pipeline is smooth.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a large-diameter high-pressure check valve. Background Technique

[0002] A high-pressure check valve, also known as a non-return valve, one-way valve, backflow valve or back pressure valve, is mainly used in high-pressure pipeline systems to ensure that the fluid can only flow in one direction and prevent equipment damage or safety accidents caused by medium backflow.

[0003] The working principle of a high-pressure check valve is based on the pressure difference of the fluid. When the fluid flows forward in the pipeline, its pressure pushes the valve flap to open and allows the fluid to pass through; when the fluid flows backward, the valve flap automatically closes under the action of the fluid pressure and its own gravity to prevent the fluid from flowing backward. This automatic opening and closing function enables the high-pressure check valve to effectively control the flow direction of the fluid without an external power source. However, in some large-diameter high-pressure check valves, when the water pressure in the pipeline is insufficient or the flow rate is small, the valve flap cannot be opened due to its excessive weight, ultimately resulting in the blockage of the pipeline water flow. In view of the above situation, the utility model provides a large-diameter high-pressure check valve to solve the above problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a large-diameter high-pressure check valve, which solves the problem that in some large-diameter high-pressure check valves, when the water pressure in the pipeline is insufficient or the flow rate is small, the valve flap cannot be opened due to its excessive weight, ultimately resulting in the blockage of the pipeline water flow.

[0005] To achieve the above objectives, the utility model is realized through the following technical solutions: A large-diameter high-pressure check valve includes a large-diameter check valve, a swing check component is rotatably connected inside the large-diameter check valve, the swing check component includes a main valve flap, an arc-shaped chamber is opened on the main valve flap, a second valve flap is rotatably connected inside the arc-shaped chamber, a support block is fixedly connected to the back of the second valve flap, the arc-shaped chamber is opened on the outer surface of the lower end of the main valve flap, and the opening directions of the main valve flap and the second valve flap are the same.

[0006] Preferably, water inlets and outlets are respectively fixedly connected to both ends of the large-diameter check valve, a sealing valve is fixedly connected to the top end of the large-diameter check valve, and a connecting fixing block is fixedly connected to one side of the large-diameter check valve.

[0007] Preferably, an annular sealing ring is fixedly connected inside the water inlet, and the main valve flap is movably clamped inside the annular sealing ring.

[0008] Preferably, a threaded fixing rod is fixedly connected to the back of the main valve flap, a cross bar is fixedly connected inside the arc-shaped chamber, and a semi-circular ring-shaped sealing ring is fixedly connected inside the arc-shaped chamber.

[0009] Preferably, the second valve flap is rotatably connected to the cross bar, and the second valve flap abuts against the semi-circular ring-shaped sealing ring.

[0010] Preferably, the swing check assembly further includes a fixed long rod, the fixed long rod is arranged on the top of the large-diameter check valve, one end of the fixed long rod is fixedly connected with a fixing piece, the other end of the fixed long rod is fixedly connected to the inner wall of the large-diameter check valve, and the fixing piece is fixedly connected outside the connecting fixing block.

[0011] Preferably, the swing check assembly further includes a rotating connecting rod, the top end of the rotating connecting rod is rotatably connected to the fixed long rod, the bottom end of the rotating connecting rod is movably inserted into the threaded fixing rod, a nut is arranged on the back of the rotating connecting rod, the nut is threadedly connected to the threaded fixing rod, and the rotating connecting rod is fixedly connected to the threaded fixing rod through the nut.

[0012] The utility model discloses a large-diameter high-pressure check valve, and the beneficial effects thereof are as follows: By clamping a second small valve flap at the bottom of the swing-type main valve flap, when the water pressure in the pipeline is small and the flow rate is small, the water flow flows out from the second valve flap, reducing the probability of pipeline blockage, and enabling the large-diameter high-pressure check valve to better ensure the smoothness of the pipeline. Brief Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic front structure diagram of the whole of the present utility model;

[0015] Figure 2 It is a schematic front sectional structure diagram of the present utility model;

[0016] Figure 3 It is a schematic exploded structure diagram of the whole of the present utility model;

[0017] Figure 4 It is a schematic detailed sectional structure diagram of the present utility model;

[0018] Figure 5 It is a schematic exploded structure diagram of the swing check assembly of the present utility model;

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of the swing check assembly of the utility model.

[0020] In the figure: 1. Large-diameter check valve; 11. Water inlet; 12. Water outlet; 13. Sealing valve; 14. Connecting and fixing block; 15. Annular sealing ring; 2. Swing check assembly; 21. Main valve disc; 211. Threaded fixing rod; 212. Arc-shaped chamber; 213. Semicircular annular sealing ring; 214. Cross bar; 22. Rotating connecting rod; 221. Nut; 23. Fixed long rod; 231. Fixing piece; 24. Second valve disc; 241. Support block. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. 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 making any creative efforts are within the scope of protection of the present invention.

[0022] The embodiment of the present application provides a large-diameter high-pressure check valve to solve the problem that in some large-diameter high-pressure check valves, when the water pressure in the pipeline is insufficient or the flow is small, the valve disc cannot be opened due to the excessive weight of the valve disc, which ultimately leads to blockage of water flow in the pipeline.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] The embodiment of the utility model discloses a large-caliber high-pressure check valve.

[0025] According to the attached Figure 1-6 As shown, it includes a large-diameter check valve 1, in which a swing check assembly 2 is rotatably connected. The swing check assembly 2 includes a main valve flap 21, and an arc-shaped chamber 212 is provided on the main valve flap 21. A second valve flap 24 is rotatably connected in the arc-shaped chamber 212. The back of the second valve flap 24 is fixedly connected to a support block 241. The arc-shaped chamber 212 is provided on the outer surface of the lower end of the main valve flap 21. The main valve flap 21 and the second valve flap 24 have the same opening direction. When the water flow is large and the water pressure is high, the strong pressure will open the main valve flap 21 to allow the water to pass through. When the water flow is small and the water pressure is low, it can also pass through the second valve flap 24 at the bottom of the main valve flap 21. The back of the second valve flap 24 is fixedly connected to a support block 241, so that the folding angle of the second valve flap 24 is limited.

[0026] At both ends of the large-diameter check valve 1, a water inlet 11 and a water outlet 12 are fixedly connected respectively. At the top of the large-diameter check valve 1, a sealing valve 13 is fixedly connected. On one side of the large-diameter check valve 1, a connecting fixing block 14 is fixedly connected. An annular sealing ring 15 is fixedly connected inside the water inlet 11. The main valve flap 21 is movably clamped inside the annular sealing ring 15. The water inlet 11 and the water outlet 12 of the large-diameter check valve 1 are fixed in direction, and the water flow can only flow from the water inlet 11 to the water outlet 12. The annular sealing ring 15 prevents leakage, making the device have better sealing performance.

[0027] A threaded fixing rod 211 is fixedly connected to the back of the main valve flap 21. A cross bar 214 is fixedly connected inside the arc-shaped chamber 212. A semi-circular annular sealing ring 213 is fixedly connected inside the arc-shaped chamber 212. The second valve flap 24 is rotatably connected to the cross bar 214. The second valve flap 24 abuts against the semi-circular annular sealing ring 213. The semi-circular annular sealing ring 213 is used to seal the arc-shaped chamber 212 to improve the sealing performance, and the cross bar 214 is used to enable the rotation of the second valve flap 24.

[0028] The swing check valve assembly 2 further includes a fixed long rod 23. The fixed long rod 23 is arranged at the top of the large-diameter check valve 1. One end of the fixed long rod 23 is fixedly connected with a fixing piece 231, and the other end of the fixed long rod 23 is fixedly connected to the inner wall of the large-diameter check valve 1. The fixing piece 231 is fixedly connected outside the connecting fixing block 14. The fixed long rod 23 is used to rotate the main valve flap 21 and is fixedly connected outside the connecting fixing block 14, which is convenient for disassembly and installation and makes maintenance more convenient.

[0029] The swing check valve assembly 2 further includes a rotating connecting rod 22. The top end of the rotating connecting rod 22 is rotatably connected to the fixed long rod 23. The bottom end of the rotating connecting rod 22 is movably inserted into the threaded fixing rod 211. A nut 221 is arranged on the back of the rotating connecting rod 22. The nut 221 is threadedly connected to the threaded fixing rod 211. The rotating connecting rod 22 is fixedly connected inside the threaded fixing rod 211 through the nut 221. The rotating connecting rod 22 fixes the main valve flap 21 and is rotatably connected to the fixed long rod 23 at the same time.

[0030] In summary, compared with the prior art, the following beneficial effects are achieved:

[0031] By arranging the second valve flap 24 at the bottom of the main valve flap 21, when the water pressure in the pipeline is small and the flow rate is low, the water flow flows out from the second valve flap 24, reducing the probability of pipeline blockage and making the large-diameter high-pressure check valve more capable of keeping the pipeline unobstructed.

[0032] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A large-diameter high-pressure check valve, comprising a large-diameter check valve (1), characterized in that, A swing check valve assembly (2) is rotatably connected inside the large-diameter check valve (1), and the swing check valve assembly (2) includes a main valve flap (21) and a second valve flap (24). An arc-shaped chamber (212) is formed on the main valve flap (21), the second valve flap (24) is rotatably connected inside the arc-shaped chamber (212), and a support block (241) is fixedly connected to the back of the second valve flap (24). The arc-shaped chamber (212) is formed on the outer surface of the lower end of the main valve flap (21). The opening directions of the main valve flap (21) and the second valve flap (24) are the same.

2. The large-diameter high-pressure check valve according to claim 1, wherein: An inlet (11) and an outlet (12) are respectively fixedly connected to both ends of the large-diameter check valve (1), a sealing valve (13) is fixedly connected to the top of the large-diameter check valve (1), and a connecting fixing block (14) is fixedly connected to one side of the large-diameter check valve (1).

3. The large-diameter high-pressure check valve according to claim 2, wherein: An annular sealing ring (15) is fixedly connected inside the inlet (11), and the main valve flap (21) is movably clamped inside the annular sealing ring (15).

4. A large-diameter high-pressure check valve according to claim 1, characterized in that: A threaded fixing rod (211) is fixedly connected to the back of the main valve flap (21), a cross bar (214) is fixedly connected inside the arc-shaped chamber (212), and a semi-circular annular sealing ring (213) is fixedly connected inside the arc-shaped chamber (212).

5. A large-diameter high-pressure check valve according to claim 4, characterized in that: The second valve flap (24) is rotatably connected to the cross bar (214), and the second valve flap (24) abuts against the semi-circular annular sealing ring (213).

6. A large-diameter high-pressure check valve according to claim 1, characterized in that: The swing check valve assembly (2) further includes a fixed long rod (23), the fixed long rod (23) is arranged at the top of the large-diameter check valve (1), one end of the fixed long rod (23) is fixedly connected to a fixing member (231), the other end of the fixed long rod (23) is fixedly connected to the inner wall of the large-diameter check valve (1), and the fixing member (231) is fixedly connected outside the connecting fixing block (14).

7. A large-diameter high-pressure check valve according to claim 6, characterized in that: The swing check valve assembly (2) further includes a rotating connecting rod (22), the top of the rotating connecting rod (22) is rotatably connected to the fixed long rod (23), the bottom of the rotating connecting rod (22) is movably inserted into the threaded fixing rod (211), a nut (221) is arranged on the back of the rotating connecting rod (22), the nut (221) is threadedly connected to the threaded fixing rod (211), and the rotating connecting rod (22) is fixedly connected inside the threaded fixing rod (211) through the nut (221).

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