Combined type air valve

Abstract

The utility model discloses a combined type air valve, which belongs to the technical field of valves and comprises a valve body with a valve cavity inside. The air valve further comprises a floating body assembly which is located in the valve cavity, can float up and down and is used for controlling air intake and exhaust of the air valve. The floating body assembly comprises a plastic floating barrel and a plastic valve clack. The plastic valve clack is connected with the upper guide rod, the plastic valve clack is provided with a through hole penetrating up and down, and one end of the upper guide rod extends into the through hole from the upper side of the plastic valve clack to be fixedly connected with the micro-discharge valve seat; a micro exhaust hole capable of communicating the outside with the valve cavity is formed in the micro exhaust valve seat; a micro exhaust valve clack is arranged at the position, corresponding to the micro exhaust valve seat, of the plastic floating barrel, and when the plastic floating barrel floats up and down relative to the plastic valve clack, the micro exhaust valve clack correspondingly controls opening and closing of the micro exhaust hole. According to the scheme, the micro-discharge valve seat is fixedly connected to the upper guide rod, the situation that the plastic valve clack structure is damaged due to connection of the micro-discharge valve seat and the plastic valve clack is avoided, and meanwhile linkage of the micro-discharge valve seat is firmer.

Description

Technical Field

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

[0002] As a key component in fluid pipeline systems, the composite air valve's core function is to regulate the dynamic balance of gas within the pipeline, ensuring the safe and stable operation of the system. Specifically, during the pipeline filling phase, the air valve rapidly discharges accumulated air to prevent air resistance and ensure fluid transport; when the pipeline pressure drops sharply, it draws in external air to prevent negative pressure cavities caused by liquid column separation, thereby eliminating water hammer; and during system operation, it continuously removes gas released from the liquid in the pipeline, ensuring the normal operation of the pipeline system.

[0003] However, existing air valve float or float structure designs are complex and costly. They often employ a mechanical structure using a stainless steel float and a cylindrical guide sleeve, requiring high precision machining of metal components. Furthermore, long-term exposure to water flow impacts can lead to corrosion and wear, resulting in seal failure and gas leakage. Some existing composite air valves use polymer materials such as plastics, like PP, for their float structures. However, the micro-venting structure is typically mounted on the float, which can easily compromise the structural strength of the plastic float. Additionally, the micro-venting structure is prone to insecure installation between itself and the float, potentially causing it to detach. Utility Model Content

[0004] This invention provides a composite air valve, which improves the installation method of the micro-exhaust structure, making it more secure.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A composite air valve includes a valve body having an internal valve cavity;

[0007] It also includes a float assembly located in the valve chamber and capable of floating up and down to control the air intake and exhaust of the air valve, the float assembly comprising a plastic float and a plastic valve disc;

[0008] The plastic valve disc is connected to the upper guide rod. A through hole is formed on the plastic valve disc, and one end of the upper guide rod extends from the upper side of the plastic valve disc into the through hole and is fixedly connected to the micro-exhaust valve seat. A micro-exhaust hole is formed on the micro-exhaust valve seat, which can connect to the outside world and the valve cavity. A micro-exhaust valve disc is set on the plastic float at a position corresponding to the micro-exhaust valve seat. When the plastic float floats up and down relative to the plastic valve disc, the micro-exhaust valve disc controls the opening and closing of the micro-exhaust hole.

[0009] In this design, the micro-discharge valve seat is fixedly connected to the upper guide rod to prevent damage to the plastic valve disc structure from the connection between the micro-discharge valve seat and the plastic valve disc; moreover, the fixed connection of the micro-discharge valve seat to the upper guide rod makes the connection of the micro-discharge valve seat more secure.

[0010] In a preferred embodiment, the micro-discharge valve seat includes a connecting section, one end of which is a fixed section. The connecting section extends from the lower side of the plastic valve disc into the through hole and is fixedly connected to the upper guide rod via the fixed section. By segmenting the micro-discharge valve seat, the connecting section provides a sealing connection with the plastic valve disc, while the fixed section also provides a fixed connection to the upper guide rod.

[0011] As a further improvement, the fixed section is provided with an internal thread, and the fixed section is connected to the upper guide rod by means of a thread.

[0012] As a further improvement, the micro-discharge valve seat also includes a limiting section connected to the end of the connecting section away from the fixed section; the limiting section abuts against the lower side of the plastic valve disc. The limiting section also abuts against the lower side of the plastic valve disc, and in conjunction with the connection between the fixed section and the upper guide rod, the micro-discharge valve seat is fixed in place.

[0013] As a further improvement, a groove is provided on the side of the limiting section and / or connecting section near the plastic valve disc, and a sealing ring is installed in the groove.

[0014] In another preferred embodiment, a positioning groove is formed on the upper guide rod near the upper side of the plastic valve disc, and a positioning plate is installed in the positioning groove. The positioning plate abuts against the upper side of the plastic valve disc. The lower end of the upper guide rod is fixedly connected to the micro-discharge valve seat, and the positioning plate is also fixedly connected to the upper guide rod. The positioning plate abuts against the upper side of the plastic valve disc, so that the upper guide rod is securely fixed relative to the plastic valve disc.

[0015] As a further improvement, the positioning plate is at least a half-circle arc plate, and each of the arc plates is fixed to the plastic valve flap. This facilitates the installation of the positioning plate into the positioning groove.

[0016] As a further improvement, the positioning plate is a retaining spring. The retaining spring is elastic and can be fixed in the positioning groove by itself, eliminating the need for other fasteners to fix the positioning plate to the plastic valve disc.

[0017] In one embodiment, the micro-discharge valve disc is conical in shape, and its diameter gradually increases from top to bottom. The micro-discharge valve disc is mounted on a plastic float to prevent it from falling off.

[0018] In another embodiment, an air inlet and a main exhaust port communicating with the valve cavity are respectively provided on the lower and upper sides of the valve body, and the plastic valve flap moves up and down relative to the valve body to control the opening and closing of the main exhaust port accordingly.

[0019] Other technical problems that the composite air valve of this utility model can solve, other technical features contained in the technical solution, and the advantages brought by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 Top view of a composite air valve;

[0021] Figure 2 for Figure 1 HH cross-sectional view of the main exhaust port of the composite air valve in the open state;

[0022] Figure 3 for Figure 1 HH cross-sectional view of the main exhaust port of the composite air valve in the closed state;

[0023] Figure 4 Enlarged view of the micro-discharge valve seat and micro-discharge valve disc;

[0024] Figure 5 This is a schematic diagram showing the location and structure of the micro-discharge valve seat;

[0025] Figure 6 This is a schematic diagram of a plastic valve disc structure.

[0026] Label Explanation:

[0027] 1. Valve body; 11. Air inlet; 12. Plastic float; 121. Micro exhaust valve disc; 13. Plastic valve disc; 131. Micro exhaust valve seat; 1311. Micro exhaust port; 1312. Limiting section; 1313. Connecting section; 1314. Fixing section; 1315. Sealing ring; 14. Upper guide rod; 15. Upper fixing bracket; 16. Lower guide rod; 17. Lower fixing bracket; 18. Protective bracket; 19. Positioning plate; 2. Valve cover; 3. Filter canister; 4. Protective cover. Detailed Implementation

[0028] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0029] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. These terms are primarily for better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Moreover, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0032] This embodiment provides a composite air valve, which is installed in a water pipeline system. It is mainly used for large-scale air venting when the pipeline is filled with water, large-scale air intake when the pipeline is emptied or bursts, and micro-venting of gas released in the pipeline during pipeline operation.

[0033] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the air valve includes a valve body 1, within which a valve cavity is formed. A main exhaust port and an air inlet 11, communicating with the valve cavity, are respectively located on the upper and lower sides of the valve body 1. Preferably, a valve cover 2 is sealed to the upper side of the valve body 1, and the main exhaust port is located on the valve cover 2. However, in other cases, the valve body 1 and the valve cover 2 can be formed as a single unit.

[0034] A float assembly capable of vertical movement is installed within the valve chamber. This assembly includes a plastic float 12 and a plastic valve disc 13, which are interconnected. The plastic valve disc 13 floats vertically relative to the valve body 1 to control the opening and closing of the main exhaust port. In this design, both the plastic valve disc 13 and the plastic float 12 of the air valve are made of plastic, such as PP. Compared to stainless steel, the plastic valve disc 13 and the plastic float 12 are lower in cost, have a more stable structure, and are less prone to air valve failure.

[0035] Combination Figure 4 As shown, further, the plastic valve disc 13 is connected to the upper guide rod 14. A through hole is formed on the plastic valve disc 13, extending from the top to the bottom. One end of the upper guide rod 14 extends from the upper side of the plastic valve disc 13 into the through hole and is fixedly connected to the micro-exhaust valve seat 131. A micro-exhaust port 1311, capable of connecting to the outside world and the valve cavity, is formed on the micro-exhaust valve seat 131. Specifically, the micro-exhaust port 1311 communicates with the outside world through the through hole on the plastic valve disc 13. A micro-exhaust valve disc 121 is positioned on the plastic float 12 corresponding to the micro-exhaust valve seat 131. When the plastic float 12 floats up and down relative to the plastic valve disc 13, the micro-exhaust valve disc 121 controls the opening and closing of the micro-exhaust port 1311.

[0036] In this design, the air valve allows for the release of a large amount of air from the pipeline during water filling, ensuring smooth water flow. Water enters the valve chamber through the air inlet 11, causing the float assembly to float up and down under the buoyancy of the water. Specifically, during the filling process, a large amount of air is released from the pipeline through the air valve inlet 11, the valve chamber, and the main exhaust port. After filling, water enters the valve chamber, causing the float assembly to move upwards and closer to the main exhaust port. Water continues to enter during this process until the plastic valve flap 13 in the float assembly moves to the main exhaust port and seals it, thus closing the main exhaust port.

[0037] During normal water transport, the plastic valve disc 13 seals the main vent, closing the main vent. Simultaneously, water in the valve chamber acts on the plastic float 12, which in turn drives the micro-vent valve disc 121 to seal the micro-vent hole 1311 of the micro-vent valve seat 131. As gas in the water is released and accumulates in the valve chamber, the water level drops, causing the plastic float 12 in the float assembly to descend. The float 12 then drives the micro-vent valve disc 121 to disengage from the micro-vent hole 1311, opening the micro-vent hole 1311 and releasing the released gas. The air valve then releases a small amount of gas through the micro-vent hole 1311. As this gas is released, the water level in the valve chamber rises, the plastic float 12 moves upward, and the micro-vent valve disc 121 closes the micro-vent hole 1311. This process is repeated to release the released gas through the micro-vent hole 1311. It should be noted that, since the plastic float 12 and the plastic valve disc 13 are connected by a connecting assembly, the up-and-down movement of the plastic float 12 controls the micro-venting valve disc 121 to close or open the micro-venting port 1311. The opening and closing of the main venting port during micro-venting depends on the water level in the valve chamber. For example, in some cases, a large amount of gas is released, and the water level in the valve chamber drops significantly. The downward stroke of the plastic float 12 is longer, causing the plastic float 12 to drive the micro-venting valve disc 121 to open the micro-venting port 1311, and then continue to drive the plastic valve disc 13 to move downward, thus opening the main venting port.

[0038] Finally, when the pipeline is vented or bursts, negative pressure is generated inside the pipeline, water is discharged from the valve chamber of the air valve, the float assembly falls, and the plastic valve disc 13 is separated from the main exhaust port. The main exhaust port opens, and the air valve draws in air to balance the air pressure inside and outside the pipeline.

[0039] Combination Figure 2 and Figure 3 As shown, the plastic float 12 and the plastic valve disc 13 are connected by a connecting assembly. This connecting assembly can be any feasible connection structure. For example, the upper side of the plastic float 12 can have a slot, and the lower side of the plastic valve disc 13 can have a connecting leg. The connecting leg engages with the slot, thus connecting the plastic float 12 and the plastic valve disc 13. A certain gap is reserved between the connecting leg and the slot, allowing the plastic float 12 and the plastic valve disc 13 to move relative to each other, enabling the micro-exhaust valve disc 121 to control the opening and closing of the micro-exhaust port 1311. Furthermore, to form a micro-exhaust channel, the connecting leg can be spaced apart.

[0040] In this design, the micro-exhaust valve seat 131 and the upper guide rod 14 are typically made of stainless steel. The micro-exhaust valve seat 131 is fixedly connected to the upper guide rod 14. This avoids the situation where, if the micro-exhaust valve seat 131 is fixedly connected to the plastic valve disc 13, it would damage the structure of the plastic valve disc 13 and shorten its service life over long-term operation. Furthermore, the connection between the micro-exhaust valve seat 131 and the plastic valve disc 13 is prone to instability. For example, if the micro-exhaust valve seat 131 and the plastic valve disc 13 are fixedly connected by threads, a corresponding threaded structure needs to be made on the plastic valve disc 13. The plastic valve disc 13 also needs to seal the main exhaust port, resulting in a higher frequency of repeated impacts. In this case, stress concentration is likely to occur at the threaded structure of the plastic valve disc 13, leading to damage and the possibility of the micro-exhaust valve seat 131 loosening and falling off. In this design, the micro-exhaust valve seat 131 is fixedly connected to the upper guide rod 14, thus avoiding the above-mentioned problems. Furthermore, in this design, to avoid damaging the valve disc structure, the micro-discharge valve seat 131 is fixedly connected to the upper guide rod 14, making the connection of the micro-discharge valve seat 131 more secure.

[0041] Combination Figure 5 As shown, as a further improvement, the micro-valve seat 131 includes a connecting section 1313, one end of which is a fixed section 1314. The connecting section 1313 extends from the lower side of the plastic valve disc 13 into the through hole and is fixedly connected to the upper guide rod 14 through the fixed section 1314. In one case, the fixed section 1314 is provided with an internal thread, and the fixed section 1314 and the upper guide rod 14 are connected by the thread.

[0042] Preferably, the micro-exhaust valve seat 131 further includes a limiting section 1312, which is connected to the end of the connecting section 1313 away from the fixing section 1314; the limiting section 1312 abuts against the lower side of the plastic valve disc 13. One end of the micro-exhaust valve seat 131 is fixedly connected to the upper guide rod 14 through the fixing section 1314, and the other end is firmly abutted against the lower side of the plastic valve disc 13 through the limiting section 1312, thereby firmly fixing the micro-exhaust valve seat 131 and achieving stability of the micro-exhaust of the air valve.

[0043] In this design, a sealed connection is established between the micro-discharge valve seat 131 and the plastic valve disc 13 to prevent air leakage. Specifically, grooves are formed on the sides of the limiting section 1312 and the connecting section 1313 near the plastic valve disc 13, and a sealing ring 1315 is installed in the grooves to seal the connection between the micro-discharge valve seat 131 and the plastic valve disc 13. It should be noted that in other cases, grooves may be formed only on the limiting section 1312 or only on the sides of the connecting section 1313 near the plastic valve disc 13, and the sealing ring 1315 may be installed in the grooves.

[0044] Combination Figure 5 and Figure 6 As shown, to fix the upper guide rod 14, a positioning groove is formed on the upper guide rod 14 near the upper side of the plastic valve disc 13. A positioning plate 19 is installed in the positioning groove, and the positioning plate 19 abuts against the upper side of the plastic valve disc 13. The lower end of the upper guide rod 14 is fixedly connected to the micro-discharge valve seat 131. The micro-discharge valve seat 131 is also firmly abutted against the plastic valve disc 13 through a limiting section 1312. The positioning plate 19 is also fixedly connected to the upper guide rod 14, and the positioning plate 19 abuts against the upper side of the plastic valve disc 13, so that the upper guide rod 14 is firmly fixed relative to the plastic valve disc 13, thereby making the micro-discharge valve seat 131 firmly fixed relative to the plastic valve disc 13.

[0045] In one configuration, the positioning plate 19 consists of two semi-circular arc plates, each of which is fixedly connected to the plastic valve disc 13 by a fastener, such as a screw or bolt. In other configurations, the positioning plate 19 can also be an arc plate smaller than a semi-circular arc, for example, three or four arc plates can be provided.

[0046] In another case, the positioning plate 19 is a retaining ring. The retaining ring engages in the positioning groove.

[0047] Regarding the micro-discharge valve 121, combined with Figure 4 and Figure 5 As shown, the micro-discharge valve disc 121 is conical in shape, and its diameter gradually increases from top to bottom. A mounting position is provided on the plastic float 12 to accommodate the micro-discharge valve disc 121; the diameter of this mounting position also gradually increases from top to bottom. The micro-discharge valve disc 121 is made of an elastic material, such as rubber, to facilitate its installation into the mounting position on the plastic float 12.

[0048] Combined Figure 2 As shown, a lower fixing bracket 17 is integrally provided on the valve body 1. A lower guide rod 16 is mounted on the lower fixing bracket 17 at the axial center of the valve body 1. A lower guide rod through hole is formed in the axial direction of the lower guide rod 16. One end of the lower guide rod 16 is fixedly connected to the lower fixing bracket 17, and the other end extends into the plastic float 12 and is slidably connected to the plastic float 12. When the plastic float 12 moves up and down, it moves up and down under the guidance of the lower guide rod 16.

[0049] An upper fixing bracket 15 is integrally mounted on the valve cover 2, and an upper guide rod 14 is mounted on the upper fixing bracket 15 at the axial center of the valve body 1. One end of the upper guide rod 14 is fixed relative to the plastic valve disc 13, and the other end is slidably connected to the upper fixing bracket 15. When the plastic valve disc 13 moves up and down, it moves up and down under the guidance of the upper guide rod 14.

[0050] To prevent the plastic float 12 from frequently colliding with the lower fixed frame 17 and damaging the structure of the plastic float 12 when the float assembly floats up and down, a protective bracket 18 is also provided on the lower side of the plastic float 12. The protective bracket 18 is fixed and sleeved on the lower guide rod 16.

[0051] A protective cover 4 is installed above the main exhaust port. The protective cover 4 is fixedly connected to the valve cover 2 by screws. A filter barrel 3 is also installed between the protective cover 4 and the valve cover 2. The protective cover 4 is installed to prevent dust from entering the valve and to prevent rainwater from entering the valve when the air valve is installed outdoors. Several through holes are opened on the filter barrel 3. The filter barrel 3 is used to prevent small animals and flying insects from entering the valve. On the other hand, it is used to prevent dead branches, leaves and other debris from being sucked in when the water supply to the pipeline is stopped and the air valve is drawing in air.

[0052] The terms “installation,” “setup,” “equipped with,” and “connection” used herein should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0053] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A composite air valve, comprising a valve body (1) with a valve cavity inside; characterized in that: it further comprises a float assembly in the valve cavity and capable of floating up and down for controlling the air valve to exhaust and intake air, the float assembly comprising a plastic float bucket (12) and a plastic valve flap (13); the plastic valve flap (13) is connected with an upper guide rod (14), the plastic valve flap (13) is provided with a through hole penetrating up and down, one end of the upper guide rod (14) extends into the through hole from the upper side of the plastic valve flap (13) and is fixedly connected with a micro exhaust valve seat (131); the micro exhaust valve seat (131) is provided with a micro exhaust hole (1311) capable of communicating with the outside and the valve cavity; the plastic float bucket (12) is provided with a micro exhaust valve flap (121) at a position corresponding to the micro exhaust valve seat (131), and when the plastic float bucket (12) floats up and down relative to the plastic valve flap (13), the micro exhaust valve flap (121) controls the opening and closing of the micro exhaust hole (1311) correspondingly.

2. The compound air valve of claim 1, wherein: the micro exhaust valve seat (131) comprises a connecting section (1313), one end of the connecting section (1313) being a fixed section (1314); the connecting section (1313) extends into the through hole from the lower side of the plastic valve flap (13) and is fixedly connected with the upper guide rod (14) through the fixed section (1314).

3. The compound air valve of claim 2, wherein: the fixed section (1314) is provided with an internal thread, and the fixed section (1314) and the upper guide rod (14) are connected in a threaded manner.

4. The compound air valve of claim 2, wherein: the micro exhaust valve seat (131) further comprises a limiting section (1312) connected at one end of the connecting section (1313) away from the fixed section (1314); the limiting section (1312) abuts against the lower side of the plastic valve flap (13).

5. The compound air valve of claim 4, wherein: the limiting section (1312) and / or the connecting section (1313) are provided with a groove on the side close to the plastic valve flap (13), and a sealing ring (1315) is installed in the groove.

6. The compound air valve according to any one of claims 1-5, characterized in that: the upper guide rod (14) is provided with a positioning groove at the side close to the upper side of the plastic valve flap (13), and a positioning plate (19) is installed in the positioning groove, and the positioning plate (19) abuts against the upper side of the plastic valve flap (13) at the same time.

7. The compound air valve of claim 6, wherein: the positioning plate (19) is at least a semicircular arc plate, and each semicircular arc plate is fixed on the plastic valve flap (13).

8. The compound air valve of claim 6, wherein: the positioning plate (19) is a clasp spring.

9. The compound air valve of claim 1, wherein: the micro exhaust valve flap (121) is conical, and the diameter of the micro exhaust valve flap (121) gradually increases from top to bottom.

10. The compound air valve of claim 1, wherein: the lower side and the upper side of the valve body (1) are respectively provided with an air inlet (11) and a main exhaust port communicating with the valve cavity, and when the plastic valve flap (13) floats up and down relative to the valve body (1), the opening and closing of the main exhaust port are controlled correspondingly.

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