Integrated check stop valve

Abstract

The utility model discloses an integrated check stop valve, which relates to the technical field of valves, and comprises a valve body and a connecting flange integrally formed at the upper part of the valve body, when the check stop valve is closed, impurities on the surface of a sealing ring of a valve seat can be scraped off through a scraping ring by utilizing the matching of the scraping ring and a buffer cylinder; the valve clack and the buffer cylinder are adjusted to proper positions through the adjusting rod, water flow can impact impurities on the surface of the valve seat sealing ring, the problem that when the check stop valve is used, the impurities in water can be attached to the surface of the valve seat sealing ring, and the sealing performance of the check stop valve is affected is solved through cooperation of the valve clack and the buffer cylinder, and the service life of the check stop valve is prolonged; meanwhile, the flow direction of water flow can be changed by matching the splitter plate with the buffer cylinder provided with the concave arc surface, direct impact force on the valve clack can be reduced, and the problem that when the check stop valve is closed, water flow movement is suddenly blocked, large impact force is generated, the valve clack is impacted, and the valve clack is prone to being damaged is solved; and the practical performance of the check stop valve can be improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an integrated check valve. Background Technology

[0002] In the field of modern fluid transportation, pipeline systems are widely used in industrial production, municipal construction and building facilities, and check valves, as key components, play a vital role.

[0003] 1. When check valves are used in municipal construction and building facilities, the water flow contains impurities such as mud, sand, and rust. These impurities will adhere to the surface of the valve seat sealing ring during use, which will affect its sealing performance over time and result in a shorter service life of the check valve.

[0004] 2. When the check valve is closed, the water flow is suddenly obstructed, which will generate a large impact force on the valve disc, which can easily damage the valve disc and result in poor performance of the check valve. Utility Model Content

[0005] To address the above problems, this utility model provides an integrated check valve, which solves the aforementioned issues.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated check valve, comprising a valve body and a connecting flange integrally formed on the upper part of the valve body, wherein a double-plate clamping check valve is provided inside the valve body, a sealing cover is connected to the top of the connecting flange, an adjusting rod is threadedly connected inside the sealing cover, a disc is fixedly connected to the bottom of the adjusting rod, and a frustum is rotatably connected to the outside of the disc.

[0007] A valve disc is fixedly connected to the bottom of the truncated cone, a valve disc sealing ring is fixedly connected to the outside of the valve disc, and a scraper ring is fixedly connected to the outside of the valve disc, with the scraper ring located at the bottom of the valve disc sealing ring.

[0008] A buffer cylinder is fixedly connected to the bottom of the valve disc, and cross-distributed flow dividers are fixedly connected inside the buffer cylinder. The inner top surface of the buffer cylinder is a concave arc surface, and the side edges of the flow dividers are arc-shaped.

[0009] Preferably, an adjusting handwheel is connected to the top of the adjusting rod, and a scale bar is provided on the outside of the adjusting rod.

[0010] Preferably, the top of the sealing cover is connected to two support rods, and the outside of the two support rods is provided with positioning blocks.

[0011] Preferably, the inside of the positioning block is sleeved with the outside of the adjusting rod, and an indicator ring is fixedly connected to the top of the positioning block.

[0012] Preferably, a valve seat is fixedly connected inside the valve body, a valve seat sealing ring is provided inside the valve seat, and the valve disc is disposed inside the valve seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This application utilizes a scraper ring in conjunction with a buffer cylinder. When the check valve is closed, the scraper ring scrapes away impurities on the surface of the valve seat sealing ring. The valve disc and buffer cylinder are adjusted to appropriate positions via an adjusting rod. The water flow is subjected to stronger constraint and friction, causing the water flow to impact the impurities on the surface of the valve seat sealing ring. The combination of these two mechanisms solves the problem of impurities in the water adhering to the surface of the valve seat sealing ring and affecting its sealing performance during use, thus improving the service life of the check valve.

[0015] 2. This application uses a flow divider plate in conjunction with a buffer cylinder with a concave arc surface to change the flow direction of water. The buffer cylinder with the concave arc surface acts as a flow guide device, guiding the water flow along the arc. Its impact energy is gradually dispersed and consumed, thereby reducing the direct impact force on the valve disc. This solves the problem that when the check valve is closed, the sudden obstruction of water flow will generate a large impact force that can easily damage the valve disc, thus improving the practical performance of the check valve. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the valve disc structure of this utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the valve disc structure of this utility model;

[0020] Figure 5 This is a partial structural schematic diagram of the present invention.

[0021] The following are the labels in the diagram: 1. Valve body; 2. Connecting flange; 3. Sealing cover; 4. Double-plate check valve; 5. Adjusting rod; 6. Disc; 7. Frustum; 8. Valve disc; 9. Valve disc sealing ring; 10. Scraper ring; 11. Buffer cylinder; 12. Diverter plate; 13. Adjusting handwheel; 14. Scale bar; 15. Indicator ring; 16. Support rod; 17. Positioning block; 18. Valve seat; 19. Valve seat sealing ring. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] Please see Figures 1 to 5 The integrated check valve includes a valve body 1 and a connecting flange 2 integrally formed on the upper part of the valve body 1. Inside the valve body 1 is a double-plate check valve 4. When water flows normally, it impacts the double-plate check valve 4, causing it to rotate and open. The two valve plates open to both sides, forming a larger flow channel to reduce fluid resistance. When backflow occurs, the fluid pressure pushes the two valve plates towards the closing direction. Under the action of the reverse fluid pressure, the valve plates quickly close and fit tightly together, thus preventing backflow. The double-plate check valve 4 is a known technology, and those skilled in the art can and should understand its specific function and structure; therefore, it will not be described in detail here. A sealing cap 3 is connected to the top of the connecting flange 2. Personnel use bolts to connect and install the sealing cap 3 to the connecting flange 2 to seal the check valve. The internal threads of the sealing cap 3 are connected to… The valve is equipped with an adjusting rod 5. The sealing treatment between the adjusting rod 5 and the sealing cover 3 is a known technology. Those skilled in the art can and should understand its specific function and structure, so it will not be described in detail here. The bottom of the adjusting rod 5 is fixedly connected to a disc 6. The outside of the disc 6 is rotatably connected to a frustum 7. When adjusting the check valve, the operator rotates the adjusting handwheel 13 to drive the adjusting rod 5 to rotate. Because the outside of the adjusting rod 5 is threadedly connected to the inside of the sealing cover 3, the adjusting rod 5 will also rise and fall while rotating, thereby driving the frustum 7 and the valve disc 8 to rise and fall. It should be noted that the adjusting rod 5 is rotatably connected to the frustum 7 through the disc 6. Therefore, when the adjusting rod 5 rotates, the disc 6 will also rotate inside the frustum 7, which will not hinder the rotation of the adjusting rod 5. Of course, when the adjusting rod 5 rises and falls, the disc 6 will drive the frustum 7 to rise and fall, thereby driving the valve disc 8 to rise and fall.

[0024] By using the valve disc 8 to rise and separate from the valve seat 18 to open the check valve, the water flow can flow normally from the valve seat 18. Of course, when the valve disc 8 falls and cooperates with the valve seat 18, the check valve is closed, and the water flow will be blocked at the valve seat 18.

[0025] A valve disc 8 is fixedly connected to the bottom of the truncated cone 7. A valve disc sealing ring 9 is fixedly connected to the outside of the valve disc 8. A scraper ring 10 is fixedly connected to the outside of the valve disc 8. The scraper ring 10 is located at the bottom of the valve disc sealing ring 9. When the check valve is closed, the buffer cylinder 11 will enter the interior of the valve seat 18 before the valve disc 8. When the valve disc 8 is also close to the valve seat 18, the space between the outside of the buffer cylinder 11 and the valve seat sealing ring 19 is small. The water flow will be subject to stronger constraints and friction, which will cause some of the fluid's kinetic energy to be converted into pressure energy, thus resulting in increased water flow pressure. Therefore, at this time, the water flow will impact the impurities on the surface of the valve seat sealing ring 19 and the valve disc sealing ring 9, causing the impurities to loosen on the valve seat sealing ring 19.

[0026] Subsequently, valve disc 8 continues to descend, and scraper ring 10 enters the interior of valve seat sealing ring 19 before valve disc sealing ring 9. Therefore, scraper ring 10 scrapes off impurities on the surface of valve seat sealing ring 19. The scraped impurities fall into the water below valve seat 18. When the check valve is opened again, the water flow will carry these impurities away. This achieves the cooperation between scraper ring 10 and buffer cylinder 11 to prevent impurities in the water from adhering to the surface of valve seat sealing ring during use, which will affect its sealing performance over time and thus affect the service life of check valve. It is worth noting that personnel can also adjust the position of valve disc 8 to specifically clean impurities on the surface of valve seat sealing ring 19.

[0027] When the check valve is closed, the scraper ring 10, in conjunction with the buffer cylinder 11, scrapes away impurities on the surface of the valve seat sealing ring 19. The valve disc 8 and the buffer cylinder 11 are adjusted to a suitable position (a position with a smaller water flow channel) by the adjusting rod 5. At this time, the space between the outside of the buffer cylinder 11 and the valve seat sealing ring 19 is smaller, and the water flow will be subject to stronger constraints and friction, which will convert some of the fluid's kinetic energy into pressure energy, resulting in increased water pressure. Therefore, the water flow will impact the impurities on the surface of the valve seat sealing ring 19. The combination of the two solves the problem that impurities in the water will adhere to the surface of the valve seat sealing ring 19 during the use of the check valve, affecting its sealing performance, and is beneficial to improving the service life of the check valve.

[0028] A buffer cylinder 11 is fixedly connected to the bottom of the valve disc 8. Inside the buffer cylinder 11, cross-distributed diverter plates 12 are fixedly connected. The inner top surface of the buffer cylinder 11 is a concave arc surface, and the side of the diverter plate 12 is arc-shaped. When the check valve is closed, the valve disc 8 will close the valve seat 18. At this time, the concave arc surface of the buffer cylinder 11, together with the diverter plate 12, buffers the impact force of the water flow. Specifically, when the water flow comes into contact with the buffer cylinder 11, the water flow no longer impacts the valve disc in a concentrated and direct manner, but changes its flow direction along the contour of the diverter plate 12 and the space formed by the intersection. This change in flow direction can consume part of the kinetic energy of the water flow, thereby reducing the direct impact force on the valve disc 8.

[0029] Furthermore, the concave arc surface of the buffer cylinder 11 acts as a flow guide, directing the water flow along the arc. As the water flows along the inner top surface of the arc, its speed and direction gradually change, and its impact energy is gradually dispersed and consumed. This change in flow direction consumes part of the kinetic energy of the water flow, and its impact energy is gradually dispersed and consumed. This also reduces the direct impact force of the water flow on the valve disc 8 when the valve disc 8 is closed. This solves the problem that the sudden obstruction of water flow when the check valve is closed will generate a large impact force that can easily damage the valve disc 8, and is conducive to improving the practical performance of the check valve.

[0030] An adjusting handwheel 13 is connected to the top of the adjusting rod 5, and a scale bar 14 is provided on the outside of the adjusting rod 5.

[0031] The top of the sealing cover 3 is connected to two support rods 16. The outside of the two support rods 16 is provided with positioning blocks 17. The personnel place the positioning blocks 17 outside the two support rods 16 and then connect them to the support rods 16 with bolts, thereby installing and fixing the positioning blocks 17.

[0032] The inside of the positioning block 17 is sleeved with the outside of the adjusting rod 5. An indicator ring 15 is fixedly connected to the top of the positioning block 17. When the operator rotates the adjusting rod 5 to control the opening and closing of the valve disc 8, the adjusting rod 5 will rise and fall. At this time, the scale bar 14 on the adjusting rod 5 will also rise and fall. The operator can observe the scale position indicated by the indicator ring 15 to understand the position of the valve disc 8, which is convenient for operating the valve disc 8.

[0033] A valve seat 18 is fixedly connected inside the valve body 1. A valve seat sealing ring 19 is provided inside the valve seat 18, and the valve disc 8 is located inside the valve seat 18.

[0034] When using this utility model:

[0035] First, the operator rotates the adjusting handwheel 13 to drive the adjusting rod 5 to rotate. Because the outside of the adjusting rod 5 is connected to the inside of the sealing cover 3 by threads, the adjusting rod 5 will also rise and fall while rotating, thereby driving the truncated cone 7 and the valve disc 8 to rise and fall. By using the valve disc 8 to rise and separate from the valve seat 18, the check valve is opened, allowing water to flow normally from the valve seat 18. Of course, when the valve disc 8 falls and cooperates with the valve seat 18, the check valve is closed, and the water flow will be blocked at the valve seat 18.

[0036] Secondly, when the check valve is closed, the buffer cylinder 11 enters the valve seat 18 before the valve disc 8. When the valve disc 8 also approaches the valve seat 18, the space between the buffer cylinder 11 and the valve seat sealing ring 19 is smaller, resulting in stronger constraint and friction on the water flow. This causes some of the fluid's kinetic energy to be converted into pressure energy, leading to increased water pressure. Therefore, the water flow impacts impurities on the surfaces of the valve seat sealing ring 19 and the valve disc sealing ring 9, causing the impurities to loosen on the valve seat sealing ring 19. Subsequently, the valve disc... As the valve continues to descend, the scraper ring 10 will enter the interior of the valve seat sealing ring 19 before the valve disc sealing ring 9. Therefore, the scraper ring 10 will scrape off the impurities on the surface of the valve seat sealing ring 19. The scraped impurities will fall into the water below the valve seat 18. When the check valve is opened again, the water flow will carry these impurities away. This achieves the cooperation between the scraper ring 10 and the buffer cylinder 11 to prevent impurities in the water from adhering to the surface of the valve seat sealing ring during the use of the check valve, which will affect its sealing performance over time and thus affect the service life of the check valve.

[0037] Then, when the check valve is closed, the valve disc 8 will close the valve seat 18. At this time, the concave arc surface of the buffer cylinder 11, together with the diverter plate 12, buffers the impact force of the water flow. Specifically, when the water flow comes into contact with the buffer cylinder 11, the water flow no longer impacts the valve disc in a concentrated and direct manner, but changes its flow direction along the contour of the diverter plate 12 and the space formed by the intersection. This change in flow direction can consume part of the kinetic energy of the water flow, thereby reducing the direct impact force on the valve disc. In addition, the concave arc surface of the buffer cylinder 11 acts as a flow guide device, guiding the water flow along the arc. As the water flow flows along the inner top surface of the arc, its speed and direction gradually change, and its impact energy is gradually dispersed and consumed. This change in flow direction consumes part of the kinetic energy of the water flow, and its impact energy is gradually dispersed and consumed, thereby also reducing the direct impact force of the water flow on the valve disc 8 when the valve disc 8 is closed.

[0038] Finally, when the operator rotates the adjusting rod 5 to control the opening and closing of the valve disc 8, the adjusting rod 5 will rise and fall. At this time, the scale bar 14 on the adjusting rod 5 will also rise and fall. The operator can observe the scale position indicated by the indicator ring 15 to understand the position of the valve disc 8, which is convenient for operating the valve disc 8. At the same time, when the water flows normally, it will impact the double-plate clamp check valve 4 to rotate and open. The two valve plates will open to both sides to form a larger flow channel to reduce fluid resistance. When the fluid flows backward, the fluid pressure will push the two valve plates to move in the closing direction. Under the action of the reverse fluid pressure, the valve plates will quickly close and fit tightly together, thereby preventing the fluid from flowing backward.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated check stop valve, comprising a valve body (1) and an integrated connecting flange (2) on the upper part of the valve body (1), the inside of the valve body (1) is provided with a double-plate pair clamping check valve (4), and the top of the connecting flange (2) is connected with a sealing cover (3), characterized in that: The inside of the sealing cover (3) is threadedly connected with an adjusting rod (5), the bottom of the adjusting rod (5) is fixedly connected with a disc (6), the outside of the disc (6) is rotatably connected with a circular table (7); The bottom of the circular table (7) is fixedly connected with a valve clack (8), the outside of the valve clack (8) is fixedly connected with a valve clack sealing ring (9), the outside of the valve clack (8) is fixedly connected with a scraping ring (10), the scraping ring (10) is arranged at the bottom of the valve clack sealing ring (9); The bottom of the valve clack (8) is fixedly connected with a buffer cylinder (11), the inside of the buffer cylinder (11) is fixedly connected with cross-distributed flow distribution plates (12), the inner top surface of the buffer cylinder (11) is a concave circular arc surface, and the side edge of the flow distribution plate (12) is arc-shaped.

2. The integrated check stop valve of claim 1, wherein: The top end of the adjusting rod (5) is connected with an adjusting hand wheel (13), and the outside of the adjusting rod (5) is provided with a scale bar (14).

3. The integrated check stop valve of claim 1, wherein: The top of the sealing cover (3) is connected with two supporting rods (16), and the outside of the two supporting rods (16) is provided with positioning blocks (17).

4. The integrated check stop valve of claim 3, wherein: The inside of the positioning block (17) is sleeved with the outside of the adjusting rod (5), and the top of the positioning block (17) is fixedly connected with an indicating ring (15).

5. The integrated check stop valve of claim 1, wherein: The inside of the valve body (1) is fixedly connected with a valve seat (18), the inside of the valve seat (18) is provided with a valve seat sealing ring (19), and the valve clack (8) is arranged in the inside of the valve seat (18).

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