Anti-backflow marine valve

Abstract

The utility model relates to marine valve technical field discloses a kind of anti-return marine valves, including valve body, the valve body two ends are respectively provided with outlet and inlet, the valve body two ends are equipped with flange plate, the outlet inner wall is equipped with baffle, the baffle inner wall top and bottom end are all set with rotary tank, two the rotary tank are respectively clamped with sealing plate one and sealing plate two, the sealing plate one top and sealing plate two bottom end are all set with shaft hole, the rotary tank inner wall is equipped with connecting shaft, the connecting shaft movable penetrates shaft hole, the utility model, by the cooperation of sealing plate one, sealing plate two and torsional spring, when valve body is closed, sealing plate one and sealing plate two can be sealed to outlet automatically, so that it can effectively prevent backflow, improve the security of valve body use, and by setting sealing washer one and sealing washer two, the sealing property between sealing plate one, sealing plate two and baffle can be further improved, simple structure, strong practicality.

Description

Technical Field

[0001] This utility model belongs to the field of marine valve technology, specifically, it relates to a marine valve for preventing backflow. Background Technology

[0002] In shipboard systems, valves are key components controlling the direction, flow rate, and pressure of fluids. Their performance directly affects the safety, stability, and economy of ship navigation. Marine valves are widely used in various fluid systems on ships, including fuel systems, cooling water systems, and bilge water systems, undertaking important responsibilities such as regulating media flow, preventing media leakage, and ensuring the normal operation of the system.

[0003] However, traditional marine valves are prone to backflow during ship navigation due to changes in navigation attitude, the impact of waves, or fluctuations in internal system pressure. For example, in a ship's cooling water system, when the main engine stops operating or the system pressure decreases, the cooling water may flow back into the system from the outlet. This not only disrupts the normal pressure balance of the system and affects the cooling effect, but may also damage other equipment in the system and shorten its service life. To address this, we propose a marine valve that prevents backflow. Utility Model Content

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: A marine valve for preventing backflow includes a valve body with an outlet and an inlet at both ends. Flanges are installed at both ends of the valve body. A baffle is installed on the inner wall of the outlet. Rotary grooves are formed at the top and bottom of the inner wall of the baffle. A sealing plate one and a sealing plate two are respectively engaged in the two rotary grooves. A shaft hole is formed at the top of the sealing plate one and the bottom of the sealing plate two. A connecting shaft is installed on the inner wall of the rotary groove, and the connecting shaft movably passes through the shaft hole. A torsion spring connects the outer wall of the connecting shaft to the inner wall of the shaft hole.

[0005] In a preferred embodiment of this utility model, a sealing gasket is installed on the inner wall of each of the two rotating grooves, and the two sealing gaskets are respectively in close contact with the inner surface of the sealing plate and the sealing plate.

[0006] In a preferred embodiment of this utility model, an L-shaped baffle is installed on the outer side of the sealing plate one near the bottom end, and a sealing gasket two is installed on the inner side of the L-shaped baffle. The sealing gasket two is in close contact with the outer surfaces of the sealing plate one and the sealing plate two. By setting the sealing gasket one and the sealing gasket two, the sealing performance between the sealing plate one, the sealing plate two and the baffle frame can be further improved.

[0007] In a preferred embodiment of this utility model, the materials of the second sealing gasket and the first sealing gasket are corrosion-resistant rubber.

[0008] In a preferred embodiment of this utility model, a fixing ring is installed on the inner wall of the outlet, and a filter screen is detachably connected to the outer side of the fixing ring by bolts. By setting the filter screen, the fluid entering the valve body can be filtered.

[0009] In a preferred embodiment of this utility model, the filter screen is arched. By setting the filter screen to an arched shape, some of the filtered impurities can slide to the edge of the filter screen, ensuring the normal filtration efficiency of the filter screen.

[0010] Compared with the prior art, the present invention has the following advantages: This utility model, through the cooperation of sealing plate one, sealing plate two and torsion spring, can automatically seal the outlet when the valve body is closed, thereby effectively preventing backflow and improving the safety of valve body use. Furthermore, by setting sealing gasket one and sealing gasket two, the sealing performance between sealing plate one, sealing plate two and baffle frame can be further improved. The structure is simple and highly practical.

[0011] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0012] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the front cross-section of the outlet of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This utility model Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 This is a partial structural schematic diagram of the front cross-section of the imported part of this utility model.

[0013] In the diagram: 1. Valve body; 2. Outlet; 3. Flange; 4. Baffle; 5. Sealing plate one; 6. Sealing plate two; 7. Rotary groove; 8. Connecting shaft; 9. Shaft hole; 10. Torsion spring; 11. Sealing gasket one; 12. L-shaped baffle; 13. Sealing gasket two; 14. Filter screen; 15. Inlet; 16. Retaining ring. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0015] like Figures 1 to 5 As shown, a backflow prevention marine valve includes a valve body 1, with an outlet 2 and an inlet 15 at each end of the valve body 1. A flange 3 is installed at both ends of the valve body 1. A baffle 4 is installed on the inner wall of the outlet 2. A rotating groove 7 is opened at the top and bottom of the inner wall of the baffle 4. A sealing plate 5 and a sealing plate 6 are respectively engaged in the two rotating grooves 7. A shaft hole 9 is opened at the top of the sealing plate 5 and the bottom of the sealing plate 6. A connecting shaft 8 is installed on the inner wall of the rotating groove 7. The connecting shaft 8 moves through the shaft hole 9. A torsion spring 10 is connected between the outer wall of the connecting shaft 8 and the inner wall of the shaft hole 9.

[0016] Furthermore, sealing gaskets 11 are installed on the inner walls of both rotating grooves 7, and the two sealing gaskets 11 are tightly fitted to the inner surfaces of sealing plate 5 and sealing plate 6 respectively.

[0017] Furthermore, an L-shaped baffle 12 is installed on the outer side of the sealing plate 5 near the bottom, and a sealing gasket 13 is installed on the inner side of the L-shaped baffle 12. The sealing gasket 13 is in close contact with the outer surface of the sealing plate 5 and the sealing plate 6.

[0018] By setting sealing gasket 11 and sealing gasket 2 13, the sealing performance between sealing plate 1 5, sealing plate 2 6 and baffle frame 4 can be further improved.

[0019] Furthermore, both gasket 2 13 and gasket 1 11 are made of corrosion-resistant rubber.

[0020] Furthermore, a fixing ring 16 is installed on the inner wall of outlet 2, and a filter screen plate 14 is detachably connected to the outside of the fixing ring 16 by bolts.

[0021] The filter screen 14 can be used to filter the fluid entering the valve body 1.

[0022] Furthermore, the filter screen 14 is arched in shape.

[0023] By setting the filter screen 14 to an arch shape, some of the filtered impurities can slide towards the edge of the filter screen 14, ensuring the normal filtration efficiency of the filter screen 14.

[0024] The operating principle of a backflow-proof marine valve is as follows: When the valve body 1 is open, fluid enters the valve body 1 through inlet 15 and then flows out through outlet 2. During its passage through outlet 2, the fluid first compresses sealing plates 5 and 6, causing them to rotate outwards and open. This allows sealing plates 5 and 6 to twist their connected torsion springs 10, preventing them from sealing the retaining frame 4. At this point, the fluid can flow normally out of outlet 2. When the valve body 1 is closed, sealing plates 5 and 6 are no longer subjected to the pressure of the retaining springs 10. When the fluid is compressed, the sealing plates 5 and 6 will rotate inward under the restoring force of the torsion spring 10, so that the sealing plates 5 and 6 can automatically seal the baffle frame 4 to prevent backflow. With the cooperation of the sealing plates 5 and 6 and the torsion spring 10, the sealing plates 5 and 6 can automatically seal the outlet 2 when the valve body 1 is closed, thereby effectively preventing backflow and improving the safety of the valve body 1. Furthermore, by setting the sealing gaskets 11 and 13, the sealing performance between the sealing plates 5 and 6 and the baffle frame 4 can be further improved. The structure is simple and highly practical.

Claims

1. A marine valve for preventing backflow, comprising a valve body (1), wherein an outlet (2) and an inlet (15) are respectively provided at both ends of the valve body (1), and a flange (3) is installed at both ends of the valve body (1), characterized in that, A baffle (4) is installed on the inner wall of the outlet (2). A rotating groove (7) is opened at the top and bottom of the inner wall of the baffle (4). A sealing plate (5) and a sealing plate (6) are respectively engaged in the two rotating grooves (7). A shaft hole (9) is opened at the top of the sealing plate (5) and the bottom of the sealing plate (6). A connecting shaft (8) is installed on the inner wall of the rotating groove (7). The connecting shaft (8) moves through the shaft hole (9). A torsion spring (10) is connected between the outer wall of the connecting shaft (8) and the inner wall of the shaft hole (9).

2. The anti-backflow marine valve according to claim 1, characterized in that, Both of the inner walls of the two rotating grooves (7) are fitted with sealing gaskets (11), and the two sealing gaskets (11) are tightly fitted to the inner surfaces of sealing plate (5) and sealing plate (6), respectively.

3. A marine valve for preventing backflow according to claim 1, characterized in that, An L-shaped baffle (12) is installed on the outer side of the sealing plate (5) near the bottom end. A sealing gasket (13) is installed on the inner side of the L-shaped baffle (12). The sealing gasket (13) is in close contact with the outer surfaces of the sealing plate (5) and the sealing plate (6).

4. A marine valve for preventing backflow according to claim 3, characterized in that, The materials of the second sealing gasket (13) and the first sealing gasket (11) are corrosion-resistant rubber.

5. A marine valve for preventing backflow according to claim 1, characterized in that, A fixing ring (16) is installed on the inner wall of the outlet (2), and a filter screen plate (14) is detachably connected to the outside of the fixing ring (16) by bolts.

6. A marine valve for preventing backflow according to claim 5, characterized in that, The filter screen (14) is arched in shape.

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