Vacuum breaker

Abstract

The utility model discloses a vacuum breaker which comprises a valve body (1) with an outlet (101) and a valve cover (2) with an inlet (201) at one end, a valve cavity (102) is arranged in the valve body (1), and the valve cavity is communicated with the outlet (101). The other end of the valve cover (2) is connected into the valve cavity (102); one end of a first cavity (202) of the valve cover is communicated with the inlet (201), and the other end of the first cavity (202) is communicated with the valve cavity (102); an air inlet channel is formed in the side wall of the valve cover (2), one end of a second cavity (203) of the valve cover is communicated with the air inlet channel, and the other end of the second cavity is communicated with the valve cavity (102); a first valve element (204) is arranged in the first cavity, and a second valve element (205) is arranged in the second cavity (203). The vacuum breaker not only has the functions of a traditional vacuum breaker, but also has the function of a non-return connector, the vacuum breaking function and the non-return function are integrated, product materials can be reduced, and installation space can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control, and more specifically to a vacuum breaker. Background Art

[0002] A vacuum breaker is a device that automatically eliminates vacuum within water supply pipes, effectively preventing siphonage and backflow contamination. It eliminates the vacuum by introducing atmospheric air when the pressure inside the pipe falls below atmospheric pressure, thereby protecting the piping system from negative pressure and preventing damage to pipes and equipment caused by the vacuum effect. Vacuum breakers are widely used in firefighting, swimming pools, green space irrigation, water supply and drainage, shipyards, power plants, metallurgy, and shipbuilding.

[0003] The vacuum breakers in the prior art generally adopt independent functional units and only have the function of vacuum breaking. The products have defects such as relatively simple functions, large amounts of materials, and occupying installation space. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vacuum breaker which, in addition to having the functions of a traditional vacuum breaker, also has the function of a non-return joint, integrating the vacuum breaking and non-return functions, thereby reducing product material consumption and saving installation space.

[0005] The technical solution of the present utility model is to provide a vacuum breaker with the following structure, comprising a valve body with an outlet, a valve cavity being provided in the valve body, and the valve cavity being communicated with the outlet; a valve cover with an inlet at one end, the other end of the valve cover being connected to the valve cavity; a first cavity and a second cavity being provided in the valve cover, one end of the first cavity being communicated with the inlet, and the other end of the first cavity being communicated with the valve cavity; an air inlet channel being provided on a side wall of the valve cover, one end of the second cavity being communicated with the air inlet channel, and the other end of the second cavity being communicated with the valve cavity; a first valve core being provided in the first cavity, and a second valve core being provided in the second cavity.

[0006] After adopting the above structure, the vacuum breaker of the utility model has the following advantages compared with the prior art:

[0007] The vacuum breaker of the present invention includes a first cavity and a second cavity. A first valve core is disposed within the first cavity. One end of the first cavity is connected to the inlet, and the other end of the first cavity is connected to the valve cavity. The first cavity and the first valve core form a check valve, providing a check valve. A second valve core is disposed within the second cavity. One end of the second cavity is connected to the air inlet passage, and the other end of the second cavity is connected to the valve cavity. The air inlet passage is connected to the outside world. The second cavity, the second valve core, and the air inlet passage form a vacuum breaker, providing a vacuum-breaking function. Thus, in addition to the functions of a traditional vacuum breaker, the vacuum breaker also functions as a check joint. By integrating the vacuum-breaking and check functions, the vacuum breaker can reduce product material usage and save installation space.

[0008] As an improvement, a communication hole is provided between the first cavity and the inlet, and the communication hole is an inclined hole. With this structure, the inclined hole enables the product to have a sufficient sealing surface.

[0009] As an improvement, a radially convex ring is provided on the inner wall of the valve cavity. The first valve core is movable and limited between the radially convex ring and the inner wall of the first cavity; the second valve core is movable and limited between the radially convex ring and the inner wall of the second cavity. With this structure, the radially convex rings respectively limit the movement of the first and second valve cores within the first and second cavities, resulting in a simple structure and easy assembly.

[0010] As an improvement, the air inlet passage is located on a side of the second cavity away from the radial convex ring. With this structure, the design is more reasonable.

[0011] As an improvement, the intake passage comprises an axial tube and a radial tube. The axial tube is connected to the second cavity, one end of the radial tube is connected to the axial tube, and the other end of the radial tube is connected to the outside. With this structure, the intake duct is easier to manufacture.

[0012] As an improvement, a gap is left between the side wall of the valve body at the end away from the outlet and the outer wall of the valve cover, which is open to the outside world. The air intake channel is connected to this gap. With this structure, the entrance of the air intake channel is hidden inside the end of the valve body, preventing dust and other debris from entering, making it safer and more reliable.

[0013] As an improvement, the other end of the valve cover is connected to the inner wall of the valve cavity via a thread. With this structure, the connection structure between the valve cover and the inner wall of the valve cavity is simple and easy to assemble.

[0014] As an improvement, anaerobic adhesive is applied between the end of the other end of the valve cover and the inner wall of the valve cavity. With this structure, the sealing effect of the connection between the valve cover and the inner wall of the valve cavity is better.

[0015] As an improvement, an embedding groove is provided on the inner side of the inlet of the valve cover, and a sealing gasket is provided in the embedding groove. After adopting this structure, the arrangement of the sealing gasket makes the connection between the valve cover and the pipeline more sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a vacuum breaker of the utility model.

[0017] Figure 2 It is a schematic cross-sectional view of the vacuum breaker of the utility model.

[0018] Figure 3 The figure is a side view structural diagram of the valve body of the vacuum breaker of the utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0020] Figure 5 The figure is a side view structural diagram of the valve cover of the vacuum breaker of the utility model.

[0021] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0022] Shown in the figure: 1. valve body, 101. outlet, 102. valve cavity, 103. radial convex ring, 2. valve cover, 201. inlet, 202. first cavity, 203. second cavity, 204. first valve core, 205. second valve core, 206. communicating hole, 207. axial tube, 208. radial tube, 209. gap, 210. embedded groove, 211. sealing gasket. DETAILED DESCRIPTION

[0023] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0024] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0025] It should also be understood that the terms “comprises,” “has,” “includes,” and “comprising,” when used in this specification, indicate the presence of the stated features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0026] like Figures 1 to 6 As shown, this specific embodiment discloses a vacuum breaker, including a valve body 1 and a valve cover 2.

[0027] An outlet 101 is provided at one end of the valve body 1, and a valve cavity 102 is provided within the valve body 1. The valve cavity 102 has an opening on a side away from the outlet 101, and the valve cavity 102 is in communication with the outlet 101. An inlet 201 is provided at one end of the valve cover 2, and the other end of the valve cover 2 extends into the valve cavity 102 and is connected to the inner wall of the valve cavity 102. In this specific embodiment, the other end of the valve cover 2 is threadedly connected to the inner wall of the valve cavity 102, and anaerobic adhesive is applied between the two. This structure provides a more reliable connection and enhances the sealing effect.

[0028] The valve cover 2 is provided with a first cavity 202 and a second cavity 203. Both the end of the first cavity 202 away from the inlet 201 and the end of the second cavity 203 away from the inlet 201 have openings. A first valve core 204 is provided in the first cavity 202, and a second valve core 205 is provided in the second cavity 203. The first and second cavities 202 and 203 communicate with each other through an opening in the valve cavity 102. A radially convex ring 103 is provided on the inner wall of the valve cavity 102. The first valve core 204 is movably restrained between the radially convex ring 103 and the inner wall of the first cavity 202, allowing it to move axially within the first cavity 202. The second valve core 205 is movably restrained between the radially convex ring 103 and the inner wall of the second cavity 203, allowing it to move axially within the second cavity 203.

[0029] The valve cover 2 is provided with a communication hole 206 between the first cavity 202 and the inlet 201. This communication hole 206 connects the first cavity 202 and the inlet 201. The communication hole 206 is an oblique hole. When normal flow occurs within the pipeline, the first valve core 204 opens the communication hole 206, allowing the first cavity 202 and the inlet 201 to communicate with each other. When the pressure in the inlet 201 is lower than the pressure within the pipeline, the first valve core 204 blocks the communication hole 206 to prevent backflow.

[0030] An air inlet passage is provided on the sidewall of the valve cover 2. The air inlet passage is located on the side of the second cavity 203 away from the radial protruding ring 103. The air inlet passage comprises an axial tube 207 and a radial tube 208. The axial tube 207 communicates with the second cavity 203, while one end of the radial tube 208 communicates with the axial tube 207, while the other end of the radial tube 208 communicates with the outside world. A gap 209, which is open to the outside world, is left between the sidewall of the end of the valve body 1 away from the outlet 101 and the outer wall of the valve cover 2. The air inlet passage communicates with this gap 209, meaning that the inlet of the air inlet passage is concealed within the inner side of the end of the valve cover 2. When the pipeline is flowing normally, the second valve core 205 blocks the air inlet channel, preventing the second cavity 203 from communicating with the air inlet channel; when a vacuum appears in the pipeline, the second valve core 205 opens the air inlet channel, and air enters the second cavity 203 from the air inlet channel, passes through the valve core, and enters the pipeline, eliminating the vacuum in the pipeline and avoiding siphon backflow.

[0031] An embedding groove 210 is provided on the inner side of the inlet 201 of the valve cover 2, and a sealing gasket 211 is provided in the embedding groove 210. When a pipe joint is connected to the inlet 201, the end of the joint abuts against the sealing gasket 211, and the sealing gasket 211 has a sealing effect.

[0032] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the principles and spirit of the present application are included in the scope of protection of the present application.

Claims

1. A vacuum breaker, comprising a valve body (1) with an outlet (101), wherein a valve cavity (102) is provided in the valve body (1), and the valve cavity (102) and the outlet (101) are communicated with each other; characterized in that: The valve cover (2) further comprises a valve bonnet (2) having an inlet (201) at one end, the other end of the valve bonnet (2) being connected to the valve cavity (102); a first cavity (202) and a second cavity (203) being provided in the valve bonnet (2), one end of the first cavity (202) being communicated with the inlet (201), and the other end of the first cavity (202) being communicated with the valve cavity (102); an air inlet channel being provided on the side wall of the valve bonnet (2), one end of the second cavity (203) being communicated with the air inlet channel, and the other end of the second cavity (203) being communicated with the valve cavity (102); a first valve core (204) being provided in the first cavity (202), and a second valve core (205) being provided in the second cavity (203).

2. The vacuum breaker according to claim 1, characterized in that: A communicating hole (206) is provided between the first cavity (202) and the inlet (201), and the communicating hole (206) is an inclined hole.

3. The vacuum breaker according to claim 1, characterized in that: The inner wall of the valve cavity (102) is provided with a radial convex ring (103), and the first valve core (204) is movably limited between the radial convex ring (103) and the inner wall of the first cavity (202); the second valve core (205) is movably limited between the radial convex ring (103) and the inner wall of the second cavity (203).

4. The vacuum breaker according to claim 3, characterized in that: The air inlet passage is located on a side of the second cavity (203) away from the radial convex ring (103).

5. The vacuum breaker according to claim 4, characterized in that: The air inlet passage comprises an axial tube (207) and a radial tube (208), wherein the axial tube (207) is connected to the second cavity (203), one end of the radial tube (208) is connected to the axial tube (207), and the other end of the radial tube (208) is connected to the outside.

6. The vacuum breaker according to claim 1, characterized in that: A gap (209) communicating with the outside is left between the side wall of the end of the valve body (1) away from the outlet (101) and the outer side wall of the valve cover (2), and the air inlet channel is connected to the gap (209).

7. The vacuum breaker according to claim 1, characterized in that: The end portion of the other end of the valve cover (2) is connected to the inner wall of the valve cavity (102) via a threaded connection.

8. The vacuum breaker according to claim 1, characterized in that: Anaerobic adhesive is coated between the end of the other end of the valve cover (2) and the inner wall of the valve cavity (102).

9. The vacuum breaker according to claim 1, characterized in that: An embedding groove (210) is provided on the inner side of the inlet (201) of the valve cover (2), and a sealing gasket (211) is provided in the embedding groove (210).

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