A composite exhaust valve

Abstract

This utility model discloses a composite exhaust valve, including a valve body and a float that can rise and fall inside the valve body. An annular seat is fixedly connected inside the valve body, and a drain tube is screwed into the annular seat. A fine through hole is opened at the bottom of the drain tube, and the float is movably connected and embedded inside the drain tube. A limiting cylinder is connected to the top of the valve body via a flange, and a retractable buffer seal is sealed to the bottom of the limiting cylinder. The buffer seal extends downward into the valve body. When the float rises, the top of the float compresses the buffer seal upward until it forms a tight seal. This utility model effectively shortens the impact contact distance between the float and the sealing ring, and, in conjunction with a corrugated buffer tube, effectively reduces the impact force of the float on the sealing ring, ensuring a tight seal while extending the service life of both the sealing ring and the float.

Description

Technical Field

[0001] This utility model relates to the field of exhaust valve technology, specifically to a composite exhaust valve. Background Technology

[0002] Composite air intake and exhaust valves are essential valves in water supply systems, generally serving two functions: first, to promptly expel air from the pipeline; and second, to draw air into the pipeline when negative pressure occurs, preventing pipeline vibration or rupture. The structure of a composite air intake and exhaust valve typically includes a valve chamber and a float within the chamber. Effective air intake and exhaust are achieved by the float resisting pressure. The float structure is a key component. A search reveals related patent applications for improvements to the float technology within the valve chamber, such as Chinese patent CN215214758U, "An Anti-Impact Damage Composite High-Speed ​​Air Intake and Exhaust Valve."

[0003] However, existing technologies use a sealing ring on top of the float and a rubber pad at the bottom of the float to buffer the float's movement. But in practical applications, due to the large distance between the float and the sealing ring, a sudden rise in the float will directly impact the sealing ring. Relying solely on the sealing ring for buffering is ineffective and can easily lead to deformation and damage over time. Therefore, this paper proposes an improved composite exhaust valve with an internal buffering structure to solve these problems. Utility Model Content

[0004] To solve the problems mentioned in the background art above, the technical solution adopted by this utility model is: a composite exhaust valve, including a valve body and a float that can be raised and lowered inside the valve body. An annular seat is fixedly connected inside the valve body. A drain tube is fixedly sleeved inside the annular seat by screws. A fine through hole is opened at the bottom of the drain tube. The float is embedded in the inner side of the drain tube and is movably connected.

[0005] The top of the valve body is connected to a limiting cylinder via a flange, and the bottom of the limiting cylinder is sealed with a retractable buffer seal. The buffer seal extends downward into the interior of the valve body. When the float rises, the top of the float compresses the buffer seal upward until it is tightly sealed.

[0006] As a preferred technical solution of this utility model, the buffer sealing element includes a fixed washer, a corrugated buffer tube, and a limiting slide cylinder. A gasket is connected between the limiting cylinder and the valve body. A fixed washer is pressed between the gasket and the limiting cylinder. A corrugated buffer tube is integrally connected to the bottom end of the fixed washer. A sealing ring is integrally connected to the bottom end of the corrugated buffer tube. A fixed pressure ring is provided on the outer side of the bottom end of the sealing ring. A screw is connected through the fixed pressure ring from bottom to top. The fixed pressure ring passes through the inside of the sealing ring through the screw and is threadedly connected to the inside of the limiting slide cylinder.

[0007] As a preferred embodiment of this utility model, the limiting slide cylinder is longitudinally slidably sleeved inside the limiting cylinder, and the outer side of the limiting slide cylinder matches the inner side of the limiting cylinder.

[0008] As a preferred embodiment of this utility model, the sealing ring is directly opposite the top of the float and matches the outer side of the top of the float, and a lower guide rod is fixedly connected to the middle of the bottom end of the float.

[0009] As a preferred technical solution of this utility model, an upper guide rod is fixedly connected to the middle of the top of the float, the upper guide rod slides through the inside of the upper guide sleeve, and a fixing rod is fixedly connected between the outer side of the upper guide sleeve and the limiting cylinder.

[0010] As a preferred technical solution of this utility model, a lower guide sleeve is fixedly connected inside the bottom end of the drainage tube, a lower guide rod is slidably connected inside the lower guide sleeve, and a coarse through hole is opened on the upper circumference of the drainage tube.

[0011] As a preferred embodiment of this utility model, the number of fine through holes is set to several, the inner diameter of the fine through holes is much smaller than that of the coarse through holes, and the diameter of the fine through holes is 2-3mm.

[0012] As a preferred technical solution of this utility model, the bottom end of the valve body is provided with a water inlet, the top end of the valve body is fixedly connected with a top cover by bolts, and a dustproof mesh sleeve is sleeved between the top cover and the limiting cylinder.

[0013] As a preferred technical solution of this utility model, an inner lining ring is provided at the opposite end of the limiting cylinder and the top cover, and the outer diameter of the inner lining ring is the same as the inner diameter of the dustproof mesh cylinder.

[0014] As a preferred embodiment of this utility model, a gasket is provided at the connection between the gasket ring and the valve body, and a miniature exhaust valve is connected to one side of the upper end of the valve body via a pipe.

[0015] This utility model has the following advantages:

[0016] By adopting the structure of this utility model, the impact contact distance between the float and the sealing ring can be effectively shortened. In conjunction with the corrugated buffer tube, the impact force of the float on the sealing ring can be effectively reduced. While ensuring the seal, the service life of the sealing ring and the float can be extended. After the water level inside the valve body drops, the float squeezes the water inside the diversion tube during its fall. Since the water flow through the small through hole at the bottom of the diversion tube is poor, when the float falls close to the bottom of the diversion tube, the water in the diversion tube acts as a buffer, preventing the float from directly hitting the bottom and thus achieving the effect of buffering and protecting the float. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the internal structure of the valve body according to a preferred embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the sealing and buffering structure of a preferred embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the sealing buffer structure of a preferred embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the dustproof mesh cylinder structure of a preferred embodiment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Annular seat; 3. Drain tube; 4. Fine through hole; 5. Lower guide sleeve; 6. Lower guide rod; 7. Float; 8. Washer ring; 9. Limiting cylinder; 10. Fixing washer; 11. Corrugated buffer tube; 12. Sealing ring; 13. Limiting slide; 14. Fixing pressure ring; 15. Upper guide rod; 16. Fixing rod; 17. Upper guide sleeve; 18. Top cover; 19. Dustproof mesh cylinder; 20. Inner liner ring; 21. Coarse through hole; 22. Miniature exhaust valve. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Please refer to the following: Figures 1-4This utility model discloses a composite exhaust valve, comprising: a valve body 1 and a float 7 that can be raised and lowered inside the valve body 1; an annular seat 2 is fixedly connected inside the valve body 1; a drain cylinder 3 is fixedly sleeved inside the annular seat 2 by screws; a fine through hole 4 is opened at the bottom of the drain cylinder 3; the float 7 is embedded in the inner side of the drain cylinder 3 in a movable connection; a limit cylinder 9 is connected to the top of the valve body 1 through a flange; and a retractable buffer seal is sealed at the bottom of the limit cylinder 9; the buffer seal extends downward into the interior of the valve body 1; when the float 7 rises, the top of the float 7 compresses the buffer seal upward until it is tightly sealed.

[0026] Reference Figure 2 , Figure 3 As shown, the buffer seal includes a fixed washer 10, a corrugated buffer tube 11, and a limiting slide cylinder 13. A gasket 8 is connected between the limiting cylinder 9 and the valve body 1. A fixed washer 10 is pressed between the gasket 8 and the limiting cylinder 9. The corrugated buffer tube 11 is integrally connected to the bottom end of the fixed washer 10. A sealing ring 12 is integrally connected to the bottom end of the corrugated buffer tube 11. A fixed pressure ring 14 is provided on the outer side of the bottom end of the sealing ring 12. A screw is threaded through the fixed pressure ring 14 from bottom to top. The fixed pressure ring 14 passes through the inside of the sealing ring 12 through the screw and is threaded to the inside of the limiting slide cylinder 13. The fixed washer 10, the corrugated buffer tube 11, and the sealing ring 12 are all made of NBR material.

[0027] The limiting slide cylinder 13 is longitudinally slidably sleeved inside the limiting cylinder 9, with the outer side of the limiting slide cylinder 13 matching the inner side of the limiting cylinder 9. The sealing ring 12 is directly opposite the top of the float 7 and matches the outer side of the top of the float 7. A lower guide rod 6 is fixedly connected to the middle of the bottom end of the float 7, and an upper guide rod 15 is fixedly connected to the middle of the top end of the float 7. The upper guide rod 15 slides through the inside of the upper guide sleeve 17. A fixing rod 16 is fixedly connected between the outer side of the upper guide sleeve 17 and the limiting cylinder 9. A lower guide sleeve 5 is fixedly connected inside the bottom end of the drainage cylinder 3, and the lower guide rod 6 is slidably connected inside the lower guide sleeve 5. By cooperating with the upper guide rod 15 and the lower guide rod 6 and the corresponding guide sleeves (upper guide sleeve 17 and lower guide sleeve 5), the up and down movement of the float 7 can be stably ensured. The limiting cylinder 9 can guide and support the sealing ring 12, ensuring that the sealing ring 12 and the float 7 can be stably fitted together.

[0028] The upper circumference of the diversion tube 3 is provided with a coarse through hole 21 and several fine through holes 4. The inner diameter of the fine through holes 4 is much smaller than that of the coarse through hole 21, and the diameter of the fine through holes 4 is 2-3mm. The bottom end of the valve body 1 is provided with a water inlet. The top end of the valve body 1 is fixedly connected to the top cover 18 by bolts. A dustproof mesh tube 19 is sleeved between the top cover 18 and the limiting tube 9, which can prevent external dust from entering the interior of the valve body 1. The limiting tube 9 and the top cover 18 are both provided with an inner lining ring 20. The outer diameter of the inner lining ring 20 is the same as the inner diameter of the dustproof mesh tube 19. A gasket is provided at the connection between the gasket ring 8 and the valve body 1. A miniature exhaust valve 22 is connected to one side of the upper end of the valve body 1 through a pipe.

[0029] When in use, when water enters rapidly from the bottom of the valve body 1, the water entering the valve body 1 enters the diversion tube 3 through the coarse through hole 21, causing the float ball 7 to float up. The top of the float ball 7 then presses against the sealing ring 12. Under the upward thrust of the float ball 7, the sealing ring 12, along with the limiting slide tube 13, moves upward, simultaneously squeezing the corrugated buffer tube 11 upward until the corrugated buffer tube 11 is compressed to its maximum deformation (achieving a stable seal). This effectively shortens the impact contact distance between the float ball 7 and the sealing ring 12. In conjunction with the corrugated buffer tube 11, it can effectively reduce the impact force of the float ball 7 on the sealing ring 12. While ensuring a seal, it can also extend the service life of the sealing ring 12 and the float ball 7. After the gas is exhausted, the large hole stops venting. During normal operation, air pockets will naturally form inside the pipe. These air pockets will gradually form, enlarge, and concentrate at the top of the pipe, and then be discharged outward through the micro exhaust valve 22.

[0030] When the water pipeline rapidly loses pressure, the float 7 descends quickly, opening the small hole (miniature air vent 22) and causing the large-hole valve body 1 to take in a large amount of air to ensure pipeline safety. As a result, after the water level inside the valve body 1 drops, most of the water in the diversion tube 3 is quickly discharged through the coarse through hole 21, while a small amount of water located below the coarse through hole 21 is discharged through the fine through hole 4. This allows the float 7 to fall into the water in the diversion tube 3 as a buffer, and it descends as the water level in the diversion tube 3 drops.

[0031] The above structure can effectively shorten the impact contact distance between the float and the sealing ring. Combined with the corrugated buffer tube, it can effectively reduce the impact force of the float on the sealing ring. While ensuring the seal, it can extend the service life of the sealing ring and the float. After the water level inside the valve body drops, the float squeezes the water inside the diversion tube during its fall. Since the water flow through the small through hole at the bottom of the diversion tube is poor, when the float falls close to the bottom of the diversion tube, the water in the diversion tube acts as a buffer, preventing the float from directly hitting the bottom and thus protecting the float.

[0032] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0033] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A composite exhaust valve, comprising: The valve body (1) and the float (7) inside the valve body (1) are characterized in that: an annular seat (2) is fixedly connected inside the valve body (1), and a drain tube (3) is fixedly sleeved inside the annular seat (2) by screws. A fine through hole (4) is opened at the bottom of the drain tube (3), and the float (7) is embedded in the inner side of the drain tube (3) in a movable connection. The top of the valve body (1) is connected to a limiting cylinder (9) via a flange, and the bottom of the limiting cylinder (9) is sealed with a retractable buffer seal. The buffer seal extends downward into the interior of the valve body (1). When the float (7) rises, the top of the float (7) compresses the buffer seal upward until it is tightly sealed.

2. A composite exhaust valve as claimed in claim 1, wherein The buffer seal includes a fixed washer (10), a corrugated buffer tube (11), and a limiting slide (13). A gasket (8) is connected between the limiting slide (9) and the valve body (1). A fixed washer (10) is pressed between the gasket (8) and the limiting slide (9). A corrugated buffer tube (11) is integrally connected to the bottom end of the fixed washer (10). A sealing ring (12) is integrally connected to the bottom end of the corrugated buffer tube (11). A fixed pressure ring (14) is provided on the outer side of the bottom end of the sealing ring (12). A screw is connected through the fixed pressure ring (14) from bottom to top. The fixed pressure ring (14) passes through the inside of the sealing ring (12) through the screw and is threaded to the inside of the limiting slide (13).

3. A composite exhaust valve as claimed in claim 2, wherein The limiting slide (13) is longitudinally slidably sleeved inside the limiting cylinder (9), and the outer side of the limiting slide (13) matches the inner side of the limiting cylinder (9).

4. A composite exhaust valve as claimed in claim 2, wherein, The sealing ring (12) is directly opposite the top of the float (7) and matches the outer side of the top of the float (7). The bottom center of the float (7) is fixedly connected to the lower guide rod (6).

5. A composite exhaust valve as claimed in claim 1, wherein, The upper guide rod (15) is fixedly connected to the middle of the top of the float (7). The upper guide rod (15) slides through the inside of the upper guide sleeve (17). A fixing rod (16) is fixedly connected between the outer side of the upper guide sleeve (17) and the limiting cylinder (9).

6. A composite exhaust valve as in claim 1 wherein, The bottom end of the drainage tube (3) is fixedly connected to a lower guide sleeve (5), and the lower guide sleeve (5) is slidably connected to a lower guide rod (6). A coarse through hole (21) is opened on the upper circumference of the drainage tube (3).

7. A composite exhaust valve as in claim 1 wherein, The number of fine through holes (4) is set to several, and the inner diameter of the fine through holes (4) is much smaller than that of the coarse through holes (21). The diameter of the fine through holes (4) is 2-3 mm.

8. A composite exhaust valve as in claim 1 wherein, The valve body (1) has a water inlet at the bottom and a top cover (18) is fixedly connected to the top of the valve body (1) by bolts. A dustproof mesh cylinder (19) is sleeved between the top cover (18) and the limiting cylinder (9).

9. A composite exhaust valve as claimed in claim 8, wherein The limiting cylinder (9) and the top cover (18) are each provided with an inner lining ring (20) at opposite ends. The outer diameter of the inner lining ring (20) is the same as the inner diameter of the dustproof mesh cylinder (19).

10. A composite exhaust valve as claimed in claim 2, wherein, A gasket is provided at the connection between the gasket (8) and the valve body (1), and a miniature exhaust valve (22) is connected to the upper side of the valve body (1) through a pipe.

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