A backflow prevention marine valve

Abstract

The utility model relates to the technical field of marine valves, and discloses a backflow-proof marine valve, including a valve body, one end of the valve body is provided with an inlet, the other end of the valve body is provided with an outlet, the valve body is provided with an anti-backflow pipeline, the anti-backflow pipeline is slidably connected with a piston-type valve disc, the piston-type valve disc is fixedly connected with a damper, the damper is fixedly connected with a valve cover, and a spring 1 is provided between the valve cover and the piston-type valve disc. In the utility model, when the fluid passes through the buffer chamber in the forward direction, the pressure of the fluid is used to compress the spring 1, and the piston-type valve disc slides out of the gap for the fluid to pass through, and when the fluid punches the piston-type valve disc from the outlet in the reverse direction, the spring cannot be compressed, thereby blocking the pipeline, and the fluid cannot enter the buffer chamber, effectively preventing the fluid from flowing back, avoiding problems such as equipment damage caused by backflow, and in addition, the setting of the damper avoids the wear caused by repeated sliding of the piston-type valve disc when the fluid flow fluctuates, thereby increasing the durability of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of marine valves, in particular to a backflow-proof marine valve. Background Art

[0002] Marine valves are an indispensable and important component in ship systems. They play a vital role in maintaining the normal operation of ships, ensuring ship safety and improving ship performance. Valves can maintain the stability and safety of ship systems and protect ships and the environment from damage. In addition, valves can also protect ship equipment and prevent equipment from overloading or damage. Therefore, marine valves are of irreplaceable importance in the shipbuilding industry.

[0003] However, traditional marine valves are prone to backflow when fluid flows back, which poses a threat to the stability and safety of the ship system. When the fluid pressure changes or the fluid flow direction changes, the valve cannot effectively control the backflow of the fluid, which may cause various safety problems, such as equipment damage, fluid leakage, etc. In addition, some marine valves with anti-backflow function are often difficult to disassemble and repair, resulting in a short service life. Therefore, the market needs a marine valve with anti-backflow function. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a backflow-proof marine valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a backflow prevention marine valve, comprising a valve body, one end of the valve body is provided with an inlet, the other end of the valve body is provided with an outlet, the valve body is provided with an anti-backflow pipeline, the anti-backflow pipeline is slidably connected with a piston-type valve disc, the piston-type valve disc is fixedly connected with a damper, the damper is fixedly connected with a valve cover, a spring is provided between the valve cover and the piston-type valve disc, the valve cover is fixedly connected with an insertion block, the anti-backflow pipeline is provided with a slot, the anti-backflow pipeline is provided with a slide groove, and the slide groove is slidably connected with a cylindrical limit block.

[0006] As a further description of the above technical solution:

[0007] The insert block is slidably connected to the slot, and the insert block is provided with a limiting hole.

[0008] As a further description of the above technical solution:

[0009] The cylindrical limiting block is fixedly connected with a cylindrical slider, the anti-backflow pipeline is rotatably connected with a rotating ring, the rotating ring is provided with a second sliding groove, and the second sliding groove is slidably connected with the cylindrical slider.

[0010] As a further description of the above technical solution:

[0011] The anti-backflow pipeline is fixedly connected with a fixing ring, the fixing ring is fixedly connected with a second spring, the second spring is fixedly connected with a ratchet, and the ratchet is fixedly connected with a button.

[0012] As a further description of the above technical solution:

[0013] The rotating ring is fixedly connected with a ratchet, and the ratchet is meshed with a pawl.

[0014] As a further description of the above technical solution:

[0015] The valve body is threadedly connected with a valve stem, one end of the valve stem is provided with a valve flap, and a buffer chamber is provided between the valve flap and the piston valve flap.

[0016] As a further description of the above technical solution:

[0017] The first slide groove is perpendicular to the slot, and the inner diameter of the limiting hole is the same as the outer diameter of the cylindrical limiting block.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, when the fluid passes through the buffer chamber in the forward direction, the pressure of the fluid is used to compress the spring, and the piston valve disc slides out of the gap for the fluid to pass through. When the fluid punches the piston valve disc in the reverse direction from the outlet, the spring cannot be compressed, thereby blocking the pipeline, and the fluid cannot enter the buffer chamber, effectively preventing the fluid from flowing back and avoiding problems such as equipment damage caused by backflow. In addition, the setting of the damper avoids the wear caused by repeated sliding of the piston valve disc when the fluid flow fluctuates, thereby increasing the durability of the equipment.

[0020] 2. In the utility model, the insert block of the valve cover is inserted into the slot, and the installation is completed by rotating the rotating ring. The valve cover can be removed by pressing the button and reversing the rotating ring, so that it is easy to disassemble and repair, and the durability is enhanced. In addition, the spring can be quickly replaced to adapt to different fluid pressures, thereby enhancing its versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a backflow prevention marine valve proposed by the utility model;

[0022] Figure 2 The utility model proposes a partial structural explosion of a backflow-proof marine valve Figure 1 ;

[0023] Figure 3 The utility model proposes a partial structural explosion of a backflow-proof marine valve Figure 2 ;

[0024] Figure 4This is a cross-sectional view of a backflow prevention marine valve proposed by the utility model;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Valve body; 2. Inlet; 3. Buffer chamber; 4. Outlet; 5. Anti-backflow pipeline; 6. Piston valve disc; 7. Damper; 8. Valve cover; 9. Spring 1; 10. Insert block; 11. Slot; 12. Limit hole; 13. Cylindrical limit block; 14. Slide 1; 15. Cylindrical slider; 16. Rotating ring; 17. Slide 2; 18. Ratchet; 19. Fixed ring; 20. Spring 2; 21. Ratchet; 22. Button. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figure 1-Figure 5 The utility model provides an embodiment: a backflow prevention marine valve, comprising a valve body 1, one end of the valve body 1 is provided with an inlet 2, the other end of the valve body 1 is provided with an outlet 4, the valve body 1 is provided with an anti-backflow pipeline 5, the anti-backflow pipeline 5 is slidably connected with a piston-type valve disc 6, the piston-type valve disc 6 is fixedly connected with a damper 7, the damper 7 is fixedly connected with a valve cover 8, a spring 9 is provided between the valve cover 8 and the piston-type valve disc 6, the valve cover 8 is fixedly connected with an insertion block 10, the anti-backflow pipeline 5 is provided with a slot 11, the anti-backflow pipeline 5 is provided with a slide groove 14, the slide groove 1 4 is slidably connected with a cylindrical limit block 13. When the fluid passes through the buffer chamber 3 in the forward direction, the pressure of the fluid is used to compress the spring 9, and the piston valve disc 6 slides out of the gap for the fluid to pass through. When the fluid punches the piston valve disc 6 from the outlet 4 in the reverse direction, the spring cannot be compressed, thereby blocking the pipeline, and the fluid cannot enter the buffer chamber 3, effectively preventing the fluid from flowing back and avoiding problems such as equipment damage caused by backflow. In addition, the setting of the damper 7 avoids the wear caused by repeated sliding of the piston valve disc 6 when the fluid flow fluctuates, thereby increasing the durability of the equipment.

[0030] The insertion block 10 is slidably connected with the slot 11, the insertion block 10 is provided with a limiting hole 12, the slide groove 14 is perpendicular to the slot 11, the inner diameter of the limiting hole 12 is the same as the outer diameter of the cylindrical limiting block 13, the cylindrical limiting block 13 is fixedly connected with a cylindrical slider 15, the anti-backflow pipeline 5 is rotatably connected with a rotating ring 16, the rotating ring 16 is provided with a slide groove 2 17, the slide groove 2 17 is slidably connected with the cylindrical slider 15, the anti-backflow pipeline 5 is fixedly connected with a fixing ring 19, the fixing ring 19 is fixedly connected with a spring 20, the spring 20 is fixedly connected with a ratchet 21, the ratchet 21 is fixedly connected A button 22 is connected, and a ratchet 18 is fixedly connected to the rotating ring 16, which is meshed with a pawl 21. A valve stem is threadedly connected to the valve body 1, and a valve disc is provided at one end of the valve stem. A buffer chamber 3 is provided between the valve disc and the piston valve disc 6. The insertion block 10 of the valve cover 8 is inserted into the slot 11, and the rotating ring 16 is rotated to complete the installation. The button 22 is pressed, and the rotating ring 16 is reversed to remove the valve cover 8, so that the marine valve is easy to disassemble and repair, and the durability is enhanced. In addition, the spring can be quickly replaced to adapt to different fluid pressures, thereby enhancing its versatility.

[0031] Working principle: First, during installation, the user inserts the insertion block 10 on one side of the valve cover 8 into the slot 11 in the anti-backflow pipeline 5, and then rotates the rotating ring 16, which drives the second slide 17, and the second slide 17 pushes the cylindrical slider 15, and the cylindrical slider 15 drives the cylindrical limit block 13 to slide along the slide 14, and the cylindrical limit block 13 is inserted into the limit hole 12, and the installation is completed. The rotating ring 16 drives the ratchet 18 to rotate, and the ratchet 18 rotates unidirectionally along the pawl 21 and cannot be reversed, which ensures the stability of the installation. Then, when using When the valve is turned, the user turns the valve stem, the valve disc at the bottom of the valve stem rises, the pipeline is unobstructed, the fluid enters the valve body 1 from the inlet 2, passes through the valve disc and enters the buffer chamber 3, the fluid pressure pushes the piston valve disc 6 to slide along the anti-backflow pipeline 5, the piston valve disc 6 compresses the spring 9, leaving a gap for the pipeline, the fluid can flow to the outlet 4, and the fluid discharge is completed. During use, if the fluid pressure in the buffer chamber 3 fluctuates, the damper 7 prevents the piston valve disc 6 from sliding back and forth quickly under the action of the spring 9 and the fluid, avoiding the fluid pressure on the piston valve disc 6. The wear caused by the plug valve disc 6 enhances its durability. Then, if you stop using it, you only need to reverse the valve stem, the valve disc at the bottom of the valve stem will drop, the pipeline will be blocked, the fluid in the buffer chamber 3 will decrease, the fluid pressure will decrease, and the piston valve disc 6 will slide along the anti-backflow pipeline 5 under the action of the spring 9 to block the pipeline. The fluid pressure at the outlet 4 presses the piston valve disc 6, making the sealing between the piston valve disc 6 and the pipeline better, thereby preventing the fluid from flowing back. Finally, if you need to repair or replace the spring 9, the staff only needs to press the button 22. Reverse the rotating ring 16. At this time, the pawl 21 is disengaged from the ratchet 18 and no longer hinders the reversal of the rotating ring 16. The rotating ring 16 rotates to drive the second slide groove 17. The second slide groove 17 drives the cylindrical slider 15. The cylindrical slider 15 drives the cylindrical limit block 13 to slide along the first slide groove 14. The cylindrical limit block 13 is disengaged from the limit hole 12, and the insertion block 10 and the slot 11 are no longer locked. The valve cover 8 can be taken out, so that it is easy to disassemble and repair, which enhances durability. In addition, the spring can be quickly replaced to adapt to different fluid pressures, thereby enhancing its versatility.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A backflow prevention marine valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with an inlet (2) at one end and an outlet (4) at the other end. The valve body (1) is provided with an anti-backflow pipeline (5). The anti-backflow pipeline (5) is slidably connected to a piston valve disc (6). The piston valve disc (6) is fixedly connected to a damper (7). The damper (7) is fixedly connected to a valve cover (8). A spring (9) is provided between the valve cover (8) and the piston valve disc (6). The valve cover (8) is fixedly connected to an insertion block (10). The anti-backflow pipeline (5) is provided with a slot (11). The anti-backflow pipeline (5) is provided with a slide groove (14). The slide groove (14) is slidably connected to a cylindrical limit block (13).

2. A backflow prevention marine valve according to claim 1, characterized in that: The insertion block (10) is slidably connected to the slot (11), and the insertion block (10) is provided with a limiting hole (12).

3. The anti-backflow marine valve according to claim 1, characterized in that: The cylindrical limit block (13) is fixedly connected to a cylindrical slider (15), the anti-backflow pipeline (5) is rotatably connected to a rotating ring (16), the rotating ring (16) is provided with a second sliding groove (17), and the second sliding groove (17) is slidably connected to the cylindrical slider (15).

4. The anti-backflow marine valve according to claim 3, characterized in that: The anti-backflow pipeline (5) is fixedly connected to a fixing ring (19), the fixing ring (19) is fixedly connected to a second spring (20), the second spring (20) is fixedly connected to a ratchet (21), and the ratchet (21) is fixedly connected to a button (22).

5. The anti-backflow marine valve according to claim 4, characterized in that: The rotating ring (16) is fixedly connected with a ratchet (18), and the ratchet (18) is meshed with a pawl (21).

6. The anti-backflow marine valve according to claim 1, characterized in that: The valve body (1) is threadedly connected to a valve stem, one end of the valve stem is provided with a valve flap, and a buffer chamber (3) is provided between the valve flap and the piston valve flap (6).

7. The anti-backflow marine valve according to claim 2, characterized in that: The first slide groove (14) is perpendicular to the slot (11), and the inner diameter of the limiting hole (12) is the same as the outer diameter of the cylindrical limiting block (13).

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