Exhaust and pressure reduction type check valve

Abstract

The utility model relates to an exhaust pressure reduction type check valve, and aims to solve the problem that the existing check valve is easy to generate air hammer and water hammer effects. The check valve comprises an inlet flow channel, an outlet flow channel and a valve element flow channel, and a bent opening is formed between the inlet flow channel and the outlet flow channel. A valve element assembly is arranged in the valve element flow channel and comprises a lower valve element plate, an exhaust column and a spring. When liquid is conveyed, the lower valve element plate is ejected open, and the liquid flows through the bent opening to be discharged; when conveying is stopped, the spring and gravity enable the lower valve element plate to block the bent opening, and backflow is prevented. The air hole in the top end of the exhaust column exhausts air when the liquid is not full, and the blocking piece floats upwards to block the air hole after the liquid is full, so that leakage is prevented. According to the design, the water hammer effect is relieved through the bent opening, the air hammer effect is prevented through the exhaust function, the advantages of being simple in structure and convenient to install are achieved, and the safety and stability of a pipeline system can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and more specifically, to a venting and pressure-reducing check valve. Background Technology

[0002] The original design purpose of check valves was to prevent fluid backflow in pipeline systems due to pressure changes, thereby protecting equipment from damage and ensuring the safe operation of the system. However, over time, it has been found that check valves can cause significant water hammer and gas residue during the process of preventing fluid backflow, which can seriously affect system efficiency and stable operation.

[0003] Chinese Patent Publication No. CN205504098U, published on August 24, 2016, describes a utility model entitled "A Dual-Control Self-Sealing Check Valve." This valve effectively prevents backflow of the medium, thus preventing water hammer damage to pumps and pipelines, reducing the impact of the medium on valve components, and has a noise reduction and vibration damping effect, extending the service life of the valve and connecting pipelines. However, during use, it may result in significant gas residue, easily leading to air hammer. Utility Model Content

[0004] This invention overcomes the shortcomings of existing check valves, which, although able to prevent the air hammer effect, still leave a large amount of residual gas, making them prone to air hammer effects and potentially causing pipe bursts or equipment damage. It provides a venting and pressure-reducing check valve that can discharge gas from the pipeline, thereby effectively preventing the air hammer effect, and also preventing the water hammer effect.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an exhaust pressure reduction check valve, comprising: an inlet flow channel, an outlet flow channel and a valve core flow channel, wherein a bend is provided between the inlet flow channel and the outlet flow channel;

[0006] A valve core assembly is installed inside the valve core flow channel;

[0007] The valve core assembly includes a lower valve core plate, an exhaust column connected to the lower valve core plate, and a spring that pushes the lower valve core plate to engage with the curved opening; the top of the exhaust column is provided with an air hole that communicates with the outside; the exhaust column is provided with a plug that can float up after being submerged in liquid and block the air hole.

[0008] In this application, during liquid delivery, the liquid enters through the inlet channel. As the liquid passes through the bend, it pushes the lower valve core plate, overcoming the spring force and opening it from the bend. The liquid then flows out through the outlet channel after passing through the bend. The bend's orientation differs from the inlet and outlet channels, effectively preventing water hammer. When liquid delivery stops, the lower valve core plate, under the force of the spring and its own weight, seals the bend, preventing liquid from flowing back into the inlet channel. Furthermore, when there is no liquid in the valve core channel, the plug separates from the vent under gravity, allowing gas to escape from the inlet and outlet channels. As liquid increases, buoyancy causes the plug to rise, eventually sealing the vent and preventing leakage. Therefore, this effectively prevents water hammer.

[0009] Preferably, an upper valve core plate is provided on the side of the lower valve core plate away from the bend, and the upper valve core plate and the lower valve core plate are connected by a connecting post.

[0010] The upper valve core plate increases the height of the spring, preventing prolonged contact between the liquid and the spring from causing corrosion.

[0011] Preferably, the exhaust column is connected to the upper valve core plate, and the upper valve core plate is provided with a valve plate hole that communicates with the exhaust column.

[0012] The gas in the pipeline can enter the exhaust column through the valve plate hole and finally be discharged.

[0013] Preferably, a sealing plate is provided at the outlet end of the valve core flow channel, and the sealing plate is connected to the outlet end of the valve core flow channel via a flange.

[0014] The sealing plate is connected to the outlet of the valve core flow channel via a flange, which makes it easy to install.

[0015] Preferably, the spring abuts against the sealing plate.

[0016] The upper valve core plate increases the height of the spring, preventing prolonged contact between the liquid and the spring from causing corrosion.

[0017] Preferably, an inner sleeve is provided inside the exhaust column, which divides the exhaust column into an inner flow channel and an outer flow channel. The bottom of the inner sleeve is provided with an abutment plate, and the abutment plate is provided with perforations.

[0018] Therefore, at a certain liquid level, the liquid will never come into contact with the blockage, and the external flow channel can always remain unobstructed.

[0019] Preferably, the opening of the curved port is provided with a fitting step, and the lower valve core plate fits into the fitting step.

[0020] The mating step, when in contact with the lower valve core plate, improves the sealing performance after the lower valve core plate comes into contact with the mating step, thus better preventing liquid backflow.

[0021] Preferably, the opening direction of the curved opening is perpendicular to the inlet and outlet flow channels.

[0022] The arrangement of the bend perpendicular to the inlet and outlet channels can effectively reduce the impact of water hammer.

[0023] Compared with existing technologies, the beneficial effects of this utility model are as follows: When conveying liquid, the liquid enters from the inlet channel. When the liquid passes through the bend, it pushes the lower valve core plate, overcoming the spring force and opening it from the bend. The liquid then flows through the bend and exits from the outlet channel. The bend reduces the water hammer effect. When liquid delivery stops, the lower valve core plate, under the force of the spring and its own weight, blocks the bend, preventing liquid from flowing back into the inlet channel. Furthermore, when there is no liquid in the valve core channel, the plug separates from the vent under gravity, allowing gas to escape from the inlet and outlet channels. As the liquid increases, the plug rises under buoyancy, eventually sealing the vent and preventing liquid leakage, thus preventing the air hammer effect. Therefore, the exhaust pressure-reducing check valve of this application simultaneously prevents both air hammer and water hammer effects. Attached Figure Description

[0024] Figure 1 This is the three-dimensional structure of this utility model.

[0025] Figure 2 This is a cross-sectional view of the present invention.

[0026] Figure 3 This is a top view of the present invention.

[0027] Figure 4 yes Figure 3 A cross-sectional view along the AA direction.

[0028] Figure 5 This is a cross-sectional view of the connection point between the exhaust column and the inner sleeve of this utility model.

[0029] In the diagram: 1. Inlet flow channel; 11. Bend section;

[0030] 2. Outlet flow channel;

[0031] 3. Valve core flow channel; 31. Extension plate; 32. Sealing plate; 321. Sealing hole;

[0032] 4. Curved opening; 41. Fitting step;

[0033] 5. Valve core assembly, 51. Lower valve core plate, 52. Upper valve core plate, 521. Valve plate hole, 53. Exhaust column, 531. Air hole, 532. Inner sleeve, 533. Inner flow channel, 534. Outer flow channel, 535. Abutment plate, 536. Connecting block, 54. Spring, 55. Connecting column. Detailed Implementation

[0034] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0035] Example 1: Refer to Figures 1 to 5 As shown, a venting pressure reduction check valve includes: an inlet flow channel 1, an outlet flow channel 2 and a valve core flow channel 3, with a bend 4 provided between the inlet flow channel 1 and the outlet flow channel 2;

[0036] A valve core assembly 5 is provided inside the valve core flow channel 3;

[0037] The valve core assembly 5 includes a lower valve core plate 51, an exhaust column 53 connected to the lower valve core plate 51, and a spring 54 that pushes the lower valve core plate 51 to cooperate with the curved opening 4; the top of the exhaust column 53 is provided with an air hole 531 that communicates with the outside; the exhaust column 53 is provided with a plugging component that can float up after being submerged in liquid and block the air hole 531.

[0038] In this application, the inlet channel 1 and the outlet channel 2 have the same diameter. A curved section 11 is provided between the inlet channel 1 and the outlet channel 2. The valve core channel 3 extends towards the inlet channel 1 with an extension plate 31. The extension plate 31 and the curved section 11 cooperate to form a curved opening 4. In this embodiment, the curved opening 4 has a circular cross-section.

[0039] The lower valve core plate 51 is shaped to fit with the curved opening 4. In this embodiment, the lower valve core plate 51 is circular. The spring 54 pushes the lower valve core plate 51 to fit against the curved opening 4, thus sealing the curved opening 4.

[0040] During liquid delivery, the liquid enters through inlet channel 1. As the liquid passes through bend 4, it pushes the lower valve core plate 51, overcoming the force of spring 54 and opening it from bend 4. The liquid then flows through bend 4 and exits through outlet channel 2. When liquid delivery stops, the lower valve core plate 51, under the force of spring 54 and its own weight, blocks bend 4, preventing liquid from flowing back into inlet channel 1. Furthermore, when there is no liquid in valve core channel 3, the plug separates from vent 531 under gravity, allowing gas to escape from inlet channel 1 and outlet channel 2. As the liquid volume increases, the plug rises under buoyancy, eventually sealing vent 531 and preventing liquid leakage.

[0041] In one embodiment, an upper valve core plate 52 is provided on the side of the lower valve core plate 51 away from the bend 4, and the upper valve core plate 52 and the lower valve core plate 51 are connected by a connecting post 55. The cross-section of the upper valve core plate 52 is adapted to the valve core flow channel 3. The spring 54 is pressed against the upper valve core plate 52. The gap between the upper valve core plate 52 and the lower valve core plate 51 forms a space. When the liquid flows back from the outlet flow channel 2 to the inlet flow channel 1, the liquid can enter the space between the upper valve core plate 52 and the lower valve core plate 51. Under the gravity of the liquid, the lower valve core plate 51 can more quickly seal the bend 4. In addition, the setting of the upper valve core plate 52 can increase the height of the spring 54, avoiding the liquid from contacting the spring 54 for a long time and causing corrosion to the spring 54.

[0042] In one embodiment, the exhaust column 53 is connected to the upper valve core plate 52, and the upper valve core plate 52 is provided with a valve plate hole 521 communicating with the exhaust column 53. Gas enters the exhaust column 53 through the valve plate hole 521 and then exits through the vent hole 531 at the top of the exhaust column 53, which can prevent damage to the equipment in the pipeline due to gas compression. Because the exhaust column 53 is set on the upper valve core plate 52, the bottom of the exhaust column 53 does not come into contact with the liquid, and it always maintains communication with the outside world and is always in a state of exhaust.

[0043] In one embodiment, a sealing plate 32 is provided at the outlet end of the valve core flow channel 3, and the sealing plate 32 is connected to the outlet end of the valve core flow channel 3 via a flange. The sealing plate 32 is connected to the outlet of the valve core flow channel 3 via a flange, which facilitates installation. A sealing hole 321 is provided through the sealing plate 32, and an exhaust column 53 passes through the sealing hole 321. When the upper valve core plate 52 moves up and down within the valve core flow channel 3, the exhaust column 53 slides within the sealing hole 321. One end of the spring 54 abuts against the sealing plate 32, and the other end of the spring 54 abuts against the upper valve core plate 52.

[0044] In one embodiment, the opening direction of the bend 4 is perpendicular to the inlet channel 1 and the outlet channel 2. Therefore, correspondingly, the valve core channel 3 in this embodiment is also perpendicular to the inlet channel 1 and the outlet channel 2. The arrangement of the bend 4 perpendicular to the inlet channel 1 and the outlet channel 2 can effectively reduce the impact of water hammer.

[0045] In one embodiment, the cross-sectional area of ​​the bend 4 is smaller than that of the inlet channel 1. By shortening the diameter of the bend 4, the pressure of the liquid flowing outward from the inlet channel 1 can be increased, and the liquid can better overcome the force of the spring 54 to push the lower valve core plate 51 upward.

[0046] In one embodiment, a fitting step 41 is provided at the opening of the curved port 4, and the lower valve core plate 51 fits against the fitting step 41. The fitting step 41 cooperates with the lower valve core plate 51 to improve the sealing performance after the lower valve core plate 51 contacts the fitting step 41, and can better prevent the backflow of liquid.

[0047] In one embodiment, an inner sleeve 532 is provided inside the exhaust column 53, and the inner sleeve 532 is fixedly connected to the inner side of the exhaust column 53 by a connecting block 536. The inner sleeve 532 divides the exhaust column 53 into an inner flow channel 533 and an outer flow channel 534, and the plug slides within the inner flow channel 533. The bottom of the inner sleeve 532 is provided with an abutment plate 535, which has a perforation. The inner sleeve 532 is positioned above the exhaust column 53. Thus, at a certain liquid level, the liquid will never come into contact with the plug, and the outer flow channel 534 can always remain open.

[0048] The working principle of this application is as follows: When conveying liquid, the liquid enters from the inlet channel 1. When the liquid passes through the bend 4, the liquid pushes the lower valve core plate 51, overcoming the force of the spring 54 and opening the lower valve core plate 51 from the bend 4. The liquid then flows through the bend 4 and out from the outlet channel 2. When the liquid is stopped, under the action of the spring force of the spring 54 and the gravity of the lower valve core plate 51, the lower valve core plate 51 blocks the bend 4, preventing the liquid from flowing back into the inlet channel 1 through the bend 4. Furthermore, when there is no liquid in the valve core channel 3, the plug separates from the vent 531 under gravity, allowing the gas in the inlet channel 1 and outlet channel 2 to be discharged. As the liquid increases, the plug floats up under buoyancy, eventually sealing the vent 531 and preventing liquid leakage.

[0049] Example 2: Refer to Figures 1 to 5 As shown, a venting pressure reduction check valve includes: an inlet flow channel 1, an outlet flow channel 2 and a valve core flow channel 3, with a bend 4 provided between the inlet flow channel 1 and the outlet flow channel 2;

[0050] A valve core assembly 5 is provided inside the valve core flow channel 3;

[0051] The valve core assembly 5 includes a lower valve core plate 51, an exhaust column 53 connected to the lower valve core plate 51, and a spring 54 that pushes the lower valve core plate 51 to cooperate with the curved opening 4; the top of the exhaust column 53 is provided with an air hole 531 that communicates with the outside; the exhaust column 53 is provided with a plugging component that can float up after being submerged in liquid and block the air hole 531.

[0052] In this application, the inlet channel 1 and the outlet channel 2 have the same diameter. A curved section 11 is provided between the inlet channel 1 and the outlet channel 2. The valve core channel 3 extends towards the inlet channel 1 with an extension plate 31. The extension plate 31 and the curved section 11 cooperate to form a curved opening 4. In this embodiment, the curved opening 4 has a circular cross-section.

[0053] The lower valve core plate 51 is shaped to fit with the curved opening 4. In this embodiment, the lower valve core plate 51 is circular. The spring 54 pushes the lower valve core plate 51 to fit against the curved opening 4, thus sealing the curved opening 4.

[0054] During liquid delivery, the liquid enters through inlet channel 1. As the liquid passes through bend 4, it pushes the lower valve core plate 51, overcoming the force of spring 54 and opening it from bend 4. The liquid then flows through bend 4 and exits through outlet channel 2. When liquid delivery stops, the lower valve core plate 51, under the force of spring 54 and its own weight, blocks bend 4, preventing liquid from flowing back into inlet channel 1. Furthermore, when there is no liquid in valve core channel 3, the plug separates from vent 531 under gravity, allowing gas to escape from inlet channel 1 and outlet channel 2. As the liquid volume increases, the plug rises under buoyancy, eventually sealing vent 531 and preventing liquid leakage.

[0055] In one embodiment, an upper valve core plate 52 is provided on the side of the lower valve core plate 51 away from the bend 4, and the upper valve core plate 52 and the lower valve core plate 51 are connected by a connecting post 55. The cross-section of the upper valve core plate 52 is adapted to the valve core flow channel 3. The spring 54 is pressed against the upper valve core plate 52. The gap between the upper valve core plate 52 and the lower valve core plate 51 forms a space. When the liquid flows back from the outlet flow channel 2 to the inlet flow channel 1, the liquid can enter the space between the upper valve core plate 52 and the lower valve core plate 51. Under the gravity of the liquid, the lower valve core plate 51 can more quickly seal the bend 4. In addition, the setting of the upper valve core plate 52 can increase the height of the spring 54, avoiding the liquid from contacting the spring 54 for a long time and causing corrosion to the spring 54.

[0056] In one embodiment, the exhaust column 53 is connected to the upper valve core plate 52, and the upper valve core plate 52 is provided with a valve plate hole 521 communicating with the exhaust column 53. Gas enters the exhaust column 53 through the valve plate hole 521 and then exits through the vent hole 531 at the top of the exhaust column 53, which can prevent damage to the equipment in the pipeline due to gas compression. Because the exhaust column 53 is set on the upper valve core plate 52, the bottom of the exhaust column 53 does not come into contact with the liquid, and it always maintains communication with the outside world and is always in a state of exhaust.

[0057] In one embodiment, a sealing plate 32 is provided at the outlet end of the valve core flow channel 3, and the sealing plate 32 is connected to the outlet end of the valve core flow channel 3 via a flange. The sealing plate 32 is connected to the outlet of the valve core flow channel 3 via a flange, which facilitates installation. A sealing hole 321 is provided through the sealing plate 32, and an exhaust column 53 passes through the sealing hole 321. When the upper valve core plate 52 moves up and down within the valve core flow channel 3, the exhaust column 53 slides within the sealing hole 321. One end of the spring 54 abuts against the sealing plate 32, and the other end of the spring 54 abuts against the upper valve core plate 52.

[0058] In one embodiment, the opening direction of the bend 4 is perpendicular to the inlet channel 1 and the outlet channel 2. Therefore, correspondingly, the valve core channel 3 in this embodiment is also perpendicular to the inlet channel 1 and the outlet channel 2. The arrangement of the bend 4 perpendicular to the inlet channel 1 and the outlet channel 2 can effectively reduce the impact of water hammer.

[0059] In one embodiment, the cross-sectional area of ​​the bend 4 is smaller than that of the inlet channel 1. By shortening the diameter of the bend 4, the pressure of the liquid flowing outward from the inlet channel 1 can be increased, and the liquid can better overcome the force of the spring 54 to push the lower valve core plate 51 upward.

[0060] In one embodiment, a fitting step 41 is provided at the opening of the curved port 4, and the lower valve core plate 51 fits against the fitting step 41. The fitting step 41 cooperates with the lower valve core plate 51 to improve the sealing performance after the lower valve core plate 51 contacts the fitting step 41, and can better prevent the backflow of liquid.

[0061] In one embodiment, an inner sleeve 532 is provided inside the exhaust column 53, and the inner sleeve 532 is fixedly connected to the inner side of the exhaust column 53 by a connecting block 536. The inner sleeve 532 divides the exhaust column 53 into an inner flow channel 533 and an outer flow channel 534, and the plug slides within the inner flow channel 533. The bottom of the inner sleeve 532 is provided with an abutment plate 535, which has a perforation. The inner sleeve 532 is positioned above the exhaust column 53. Thus, at a certain liquid level, the liquid will never come into contact with the plug, and the outer flow channel 534 can always remain open.

[0062] This embodiment is similar in structure to Embodiment 1, except that the plugging component is a rubber ball. The rubber ball is elastic and can better conform to the vent 531. Furthermore, to increase the buoyancy of the rubber ball, it can be made into a hollow structure.

[0063] The working principle of this application is as follows: When conveying liquid, the liquid enters from the inlet channel 1. When the liquid passes through the bend 4, the liquid pushes the lower valve core plate 51, overcoming the force of the spring 54 and opening the lower valve core plate 51 from the bend 4. The liquid then flows through the bend 4 and out from the outlet channel 2. When the liquid is stopped, under the action of the spring force of the spring 54 and the gravity of the lower valve core plate 51, the lower valve core plate 51 blocks the bend 4, preventing the liquid from flowing back into the inlet channel 1 through the bend 4. Furthermore, when there is no liquid in the valve core channel 3, the plug separates from the vent 531 under gravity, allowing the gas in the inlet channel 1 and outlet channel 2 to be discharged. As the liquid increases, the plug floats up under buoyancy, eventually sealing the vent 531 and preventing liquid leakage.

[0064] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A pressure-reducing exhaust check valve, characterized in that, include: The system includes an inlet flow channel, an outlet flow channel, and a valve core flow channel, with a bend between the inlet and outlet flow channels. A valve core assembly is installed inside the valve core flow channel; The valve core assembly includes a lower valve core plate, an exhaust column connected to the lower valve core plate, and a spring that pushes the lower valve core plate to engage with the curved opening; the top of the exhaust column is provided with an air hole that communicates with the outside; the exhaust column is provided with a plug that can float up after being submerged in liquid and block the air hole.

2. The exhaust pressure-reducing check valve according to claim 1, characterized in that, An upper valve core plate is provided on the side of the lower valve core plate away from the bend, and the upper valve core plate and the lower valve core plate are connected by a connecting column.

3. The exhaust pressure-reducing check valve according to claim 2, characterized in that, The exhaust column is connected to the upper valve core plate, and the upper valve core plate is provided with a valve plate hole that communicates with the exhaust column.

4. The exhaust pressure-reducing check valve according to any one of claims 1 to 3, characterized in that, A sealing plate is provided at the outlet end of the valve core flow channel, and the sealing plate is connected to the outlet end of the valve core flow channel via a flange.

5. The exhaust pressure-reducing check valve according to claim 4, characterized in that, The spring abuts against the sealing plate.

6. The exhaust pressure-reducing check valve according to any one of claims 1 to 3, characterized in that, An inner sleeve is provided inside the exhaust column, which divides the exhaust column into an inner flow channel and an outer flow channel. The bottom of the inner sleeve is provided with an abutment plate, and the abutment plate is provided with perforations.

7. The exhaust pressure-reducing check valve according to claim 1, characterized in that, The opening of the curved port is provided with a fitting step, and the lower valve core plate fits into the fitting step.

8. The exhaust pressure-reducing check valve according to claim 1, 2, 3, or 7, characterized in that, The opening direction of the curved opening is perpendicular to the inlet and outlet flow channels.

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