Vacuum breaker

Abstract

The utility model discloses a vacuum breaker which comprises a valve body, a valve cover, a countercurrent core assembly, a positioning core and a one-way component, the valve body is provided with a water inlet and a water outlet, the valve cover is provided with an air inlet, the valve cover is sleeved on the top of the valve body, at least one clamping shaft is arranged on the periphery of the valve body, and the countercurrent core assembly is arranged on the valve cover. A clamping opening matched with the clamping shaft is formed in the outer side of the valve cover, the positioning core is installed in the valve body and divides the interior of the valve body into an upstream cavity communicated with the water inlet and a downstream cavity communicated with the water outlet, and the one-way component is installed in the upstream cavity so that water can only flow from the water inlet to the downstream cavity. The countercurrent core assembly is movably arranged above the positioning core in the axial direction and used for closing the air inlet when water enters the water inlet and opening the air inlet when water stops entering the water inlet. The utility model has the advantages of simple and reliable structure, convenient assembly and low manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum breakers, in particular to a vacuum breaker that is easy to install. Background Art

[0002] In the field of sanitation, due to reasons such as insufficient awareness of safe water use and lack of standards, in sanitary equipment directly connected to the tap water terminal (such as toilets, water tanks, showers, etc.), anti-negative pressure siphon devices are rarely configured. In some extreme cases, the contaminated water in the equipment and at the back end of the equipment may flow back into the tap water pipeline, causing water source pollution and threatening the life, health and safety of the people.

[0003] The anti-siphon device (vacuum breaker) aims to prevent the siphon effect caused by the instantaneous water stop in the water supply pipeline from bringing the sewage in the toilet into the water supply pipeline.

[0004] Currently, the anti-siphon devices (vacuum breakers) circulating in the market generally have problems of complex structure, cumbersome assembly and high cost. It is necessary to improve the anti-siphon devices on the current market. Content of the Utility Model

[0005] The purpose of the utility model is to provide a vacuum breaker, which has the advantages of simple and reliable structure, convenient assembly and low manufacturing cost.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a vacuum breaker, including a valve body, a valve cover, a reverse flow core assembly, a positioning core and a one-way component. The valve body is provided with a water inlet and a water outlet, and the valve cover is provided with an air inlet. The valve cover is sleeved on the top of the valve body, and at least one clamping shaft is arranged on the outer periphery of the valve body. A clamping notch matched with the clamping shaft is arranged on the outer side of the valve cover. The positioning core is installed in the valve body and divides the inside of the valve body into an upstream chamber communicated with the water inlet and a downstream chamber communicated with the water outlet. The one-way component is installed in the upstream chamber so that water can only flow from the water inlet towards the downstream chamber. The reverse flow core assembly is axially movably arranged above the positioning core and is used for closing the air inlet when water enters the water inlet and opening the air inlet when the water inlet stops supplying water.

[0007] By adopting the above technical solution, the vacuum breaker uses the water inlet pressure to pass through the one-way component, pushes the reverse flow core assembly to the sealing surface of the valve cover to close the air inlet, and the water flows out from the water outlet; when the water supply pipeline stops supplying water, a siphon is instantly generated inside the vacuum breaker, and the reverse flow core assembly falls due to its own weight, and external air is inhaled into the vacuum breaking pipeline siphon. It is worth mentioning that the valve body and the valve cover of the vacuum breaker are connected by the cooperation of the clamping shaft and the clamping notch, which is very convenient for disassembly and assembly, and has a simple and reliable structure, which is beneficial to reducing the manufacturing cost.

[0008] The present utility model is further configured such that the bayonet includes a vertical section extending vertically and a locking section provided at the upper end of the vertical section and extending circumferentially, and the lower end of the vertical section extends to the lower end surface of the valve cover.

[0009] By adopting the above technical solution, the assembly of the valve body and the valve cover is simple and reliable through the operation mode of "pushing and rotating".

[0010] The present utility model is further configured such that the valve cover presses the positioning core against the valve body, and a lower positioning flange that is in close contact with the inner circumference of the positioning core is provided at the inner bottom end of the valve body, and an upper positioning flange that fits with the inner circumference of the positioning core is provided at the inner top end of the valve cover.

[0011] By adopting the above technical solution, reliable cooperation among the valve cover, the valve body and the positioning core can be achieved, and the cooperation structure is tight and reliable with good stability.

[0012] The present utility model is further configured such that an O-ring is clamped between the upper end of the positioning core and the inner end of the valve cover, and the inner circular surface of the O-ring fits with the outer wall of the upper positioning flange, and the outer circular surface of the O-ring fits with the inner wall of the valve body.

[0013] By adopting the above technical solution, the O-ring undertakes the functions of external and internal sealing, effectively avoiding the occurrence of medium leakage, and making the performance of the vacuum breaker more reliable.

[0014] The present utility model is further configured such that the reverse flow core assembly includes a core rod, a support disk is provided in the middle of the core rod, a sealing gasket and a lower gasket are respectively installed at positions corresponding to the upper and lower ends of the support disk of the core rod, a sealing flange that forms a sealing fit with the sealing gasket when the reverse flow core assembly moves upward is provided on the inner end surface of the valve cover, and a support flange for abutting against the lower gasket when the reverse flow core assembly moves downward is provided on the positioning core.

[0015] By adopting the above technical solution, the reverse flow core assembly has a simple and reliable structure, which is not only conducive to processing and assembly, but also has a low production cost.

[0016] The present utility model is further configured such that a first annular clamping groove is provided at a position corresponding to the upper side of the support disk on the outer periphery of the core rod, the inner edge of the sealing gasket is clamped in the first annular clamping groove, and convex ribs are provided on the lower end surface of the sealing gasket, and the convex ribs abut against the upper end surface of the support disk, so that the sealing gasket forms an arc-shaped structure.

[0017] By adopting the above technical solution, not only is the installation convenient, but after the sealing gasket forms an arc-shaped structure, the sealing performance can be improved when it cooperates with the sealing flange.

[0018] The utility model is further configured that a second annular groove is provided at a position on the outer periphery of the core rod corresponding to the lower portion of the support plate, the inner edge of the lower gasket is clamped in the second annular groove, and a clearance space is provided between the support plate and the lower gasket.

[0019] By adopting the above technical solution, not only is the installation convenient, but also the space provided for the lower gasket to make room, which plays a buffering role and can increase the service life of the vacuum breaker.

[0020] The utility model is further configured that a notch is provided on the support flange through the inside and outside.

[0021] By adopting the above technical solution, setting the notch can ensure the upstream and downstream pressure balance and enhance the anti-siphon effect of the vacuum breaker.

[0022] The utility model is further configured that the one-way component is a one-way duckbill membrane, and the bottom end of the positioning core presses the outer edge of the one-way component tightly against the bottom of the valve body.

[0023] By adopting the above technical solution, the one-way duckbill membrane has the advantages of low cost and long service life on the basis of having the function of a one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of the utility model as a whole;

[0025] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0026] Figure 3 An exploded view of the utility model as a whole;

[0027] Figure 4 It is a cross-sectional view of the countercurrent core assembly of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the positioning core of the utility model.

[0029] In the figure: 1. valve body; 2. valve cover; 3. counter-flow core assembly; 4. positioning core; 5. one-way component; 6. water inlet; 7. water outlet; 8. air inlet; 9. clamping shaft; 10. clamping joint; 11. upstream chamber; 12. downstream chamber; 13. vertical section; 14. locking section; 15. lower positioning flange; 16. upper positioning flange; 17. O-ring; 18. core rod; 19. support plate; 20. sealing gasket; 21. lower gasket; 22. sealing flange; 23. supporting flange; 24. first annular groove; 25. convex rib; 26. second annular groove; 27. clearance space; 28. notch. DETAILED DESCRIPTION

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment: As shown in the attached Figures 1 to 5 vacuum breaker, which includes a valve body 1, a valve cover 2, a reverse flow core assembly 3, a positioning core 4, and a one-way component 5. The valve body 1 is provided with a water inlet 6 and a water outlet 7. The valve cover 2 is provided with an air inlet 8. The valve cover 2 is sleeved on the top of the valve body 1, and at least one clamping shaft 9 is arranged on the outer periphery of the valve body 1. A bayonet 10 matching with the clamping shaft 9 is arranged on the outside of the valve cover 2. In this embodiment, the number of the clamping shafts 9 and the bayonets 10 is two groups. The positioning core 4 is installed in the valve body 1 and divides the inside of the valve body 1 into an upstream chamber 11 communicating with the water inlet 6 and a downstream chamber 12 communicating with the water outlet 7. The one-way component 5 is installed in the upstream chamber 11 so that water can only flow from the water inlet 6 towards the downstream chamber 12. The reverse flow core assembly 3 is axially movably arranged above the positioning core 4 and is used to close the air inlet 8 when water enters the water inlet 6 and open the air inlet 8 when the water inlet 6 stops supplying water. This vacuum breaker utilizes the water inlet pressure to pass through the one-way component 5, push the reverse flow core assembly 3 to the sealing surface of the valve cover 2 to close the air inlet 8, and the water flows out from the water outlet 7. When the water supply in the water inlet pipe stops, a siphon is instantly generated inside the vacuum breaker, and with the self-weight of the reverse flow core assembly 3 dropping, external air is inhaled into the vacuum breaker pipeline siphon. It is worth mentioning that the valve body 1 and the valve cover 2 of this vacuum breaker are connected by the cooperation of the clamping shaft 9 and the bayonet 10, which is very convenient for disassembly and assembly, and its structure is simple and reliable, which is beneficial to reducing the manufacturing cost.

[0032] As shown in the attached Figure 1 figure, the bayonet 10 includes a vertical section 13 extending vertically and a locking section 14 arranged at the upper end of the vertical section 13 and extending circumferentially, and the two form an inverted L-shaped structure. The lower end of the vertical section 13 extends to the lower end surface of the valve cover 2. When the clamping shaft 9 cooperates with the locking section 14, the two are in damping cooperation, that is, the friction force between the two is relatively large. The assembly of the valve body 1 and the valve cover 2 is simple and reliable through the operation method of "pushing and turning".

[0033] As shown in the attached Figure 2As shown, the valve cover 2 presses the positioning core 4 tightly within the valve body 1. An upper positioning flange 16 that fits against the inner circumference of the positioning core 4 is provided at the inner top end of the valve cover 2, and a lower positioning flange 15 that abuts against the inner circumference of the positioning core 4 is provided at the inner bottom end of the valve body 1. Both the upper positioning flange 16 and the lower positioning flange 15 are annular in shape. This design enables a reliable fit among the valve cover 2, the valve body 1, and the positioning core 4, with a tightly structured and reliable fit and good stability.

[0034] As shown in the Figure 2 accompanying drawings, an O-ring 17 is clamped between the upper end of the positioning core 4 and the inner end of the valve cover 2. The inner circular surface of the O-ring 17 fits against the outer wall of the upper positioning flange 16, and the outer circular surface of the O-ring 17 fits against the inner wall of the valve body 1. The O-ring 17 undertakes the functions of external and internal sealing, effectively preventing the leakage of the medium and making the performance of the vacuum breaker more reliable.

[0035] As shown in the Figure 2 and Figure 4 accompanying drawings, the countercurrent core assembly 3 includes a core rod 18. A support disk 19 is provided in the middle of the core rod 18, and the support disk 19 and the core rod 18 are of an integral structure. Sealing gaskets 20 and lower gaskets 21 are respectively installed at positions corresponding to the upper and lower ends of the support disk 19 on the core rod 18. Both the sealing gaskets 20 and the lower gaskets 21 are made of silicone material. A sealing flange 22 that forms a sealing fit with the sealing gasket 20 when the countercurrent core assembly 3 moves upward is provided on the inner end face of the valve cover 2. A support flange 23 for abutting against the lower gasket 21 when the countercurrent core assembly 3 moves downward is provided on the positioning core 4. The countercurrent core assembly 3 has a simple and reliable structure, which is not only conducive to processing and assembly but also has a low production cost.

[0036] As shown in the Figure 4 accompanying drawings, a first annular groove 24 is provided on the outer circumference of the core rod 18 corresponding to the position above the support disk 19. The inner edge of the sealing gasket 20 is clamped within the first annular groove 24, and a rib 25 is provided on the lower end face of the sealing gasket 20. The rib 25 is annular in shape, and the rib 25 abuts against the upper end face of the support disk 19, causing the sealing gasket 20 to form an arc-shaped structure. This design is not only convenient for installation, but also after the sealing gasket 20 forms an arc-shaped structure, the sealing performance can be improved when it cooperates with the sealing flange 22.

[0037] As shown in the Figure 4 accompanying drawings, a second annular groove 26 is provided on the outer circumference of the core rod 18 corresponding to the position below the support disk 19. The inner edge of the lower gasket 21 is clamped within the second annular groove 26, and a clearance space 27 is provided between the support disk 19 and the lower gasket 21. This design is not only convenient for installation, but also the clearance space 27 provides clearance for the lower gasket 21, playing a buffering role and being able to extend the service life of the vacuum breaker.

[0038] As shown in the Figure 5As shown, a notch 28 is provided through the support flange 23 inside and outside. The provision of the notch 28 can ensure the upstream and downstream pressure balance and improve the anti-siphon effect of the vacuum breaker.

[0039] In addition, the one-way component 5 is a one-way duckbill membrane, and the bottom end of the positioning core 4 presses the outer edge part of the one-way component 5 against the inner bottom of the valve body 1. On the basis of having the function of a one-way valve, the one-way duckbill membrane has the advantages of low cost and long service life.

Claims

1. A vacuum breaker, characterized in that: The invention comprises a valve body (1), a valve cover (2), a counter-flow core assembly (3), a positioning core (4) and a one-way component (5); the valve body (1) is provided with a water inlet (6) and a water outlet (7); the valve cover (2) is provided with an air inlet (8); the valve cover (2) is sleeved on the top of the valve body (1); and at least one clamping shaft (9) is provided on the outer periphery of the valve body (1); a clamping port (10) matching with the clamping shaft (9) is provided on the outer side of the valve cover (2); and the positioning core (4) is installed in the valve body (1). The interior of the valve body (1) is divided into an upstream chamber (11) communicating with the water inlet (6) and a downstream chamber (12) communicating with the water outlet (7); the one-way component (5) is installed in the upstream chamber (11) so that water can only flow from the water inlet (6) toward the downstream chamber (12); the countercurrent core assembly (3) is axially movably arranged above the positioning core (4) and is used to close the air inlet (8) when water is flowing into the water inlet (6) and to open the air inlet (8) when water stops flowing into the water inlet (6).

2. The vacuum breaker according to claim 1, characterized in that: The bayonet (10) comprises a vertical section (13) extending in the vertical direction and a locking section (14) arranged at the upper end of the vertical section (13) and extending in the circumferential direction, and the lower end of the vertical section (13) extends to the lower end surface of the valve cover (2).

3. The vacuum breaker according to claim 1, characterized in that: The valve cover (2) presses the positioning core (4) tightly into the valve body (1), and the bottom end of the valve body (1) is provided with a lower positioning flange (15) which is tightly fitted with the inner periphery of the positioning core (4), and the top end of the valve cover (2) is provided with an upper positioning flange (16) which is tightly fitted with the inner periphery of the positioning core (4).

4. The vacuum breaker according to claim 3, characterized in that: An O-ring (17) is sandwiched between the upper end of the positioning core (4) and the inner end of the valve cover (2), and the inner circumferential surface of the O-ring (17) fits with the outer wall of the upper positioning flange (16), and the outer circumferential surface of the O-ring (17) fits with the inner wall of the valve body (1).

5. The vacuum breaker according to claim 1, characterized in that: The countercurrent core assembly (3) comprises a core rod (18), a support plate (19) is provided in the middle of the core rod (18), a sealing gasket (20) and a lower gasket (21) are respectively installed at the upper and lower ends of the core rod (18) corresponding to the support plate (19), the inner end surface of the valve cover (2) is provided with a sealing flange (22) which forms a sealing fit with the sealing gasket (20) when the countercurrent core assembly (3) moves upward, and the positioning core (4) is provided with a supporting flange (23) which is used to abut against the lower gasket (21) when the countercurrent core assembly (3) moves downward.

6. The vacuum breaker according to claim 5, characterized in that: A first annular groove (24) is provided on the outer periphery of the core rod (18) at a position above the support plate (19); the inner edge of the sealing gasket (20) is clamped in the first annular groove (24); and a convex rib (25) is provided on the lower end surface of the sealing gasket (20); the convex rib (25) abuts against the upper end surface of the support plate (19), so that the sealing gasket (20) forms an arc surface structure.

7. The vacuum breaker according to claim 5, characterized in that: A second annular groove (26) is provided on the outer periphery of the core rod (18) at a position below the support plate (19), the inner edge of the lower gasket (21) is snap-fitted into the second annular groove (26), and a clearance space (27) is provided between the support plate (19) and the lower gasket (21).

8. The vacuum breaker according to claim 5, characterized in that: The support flange (23) is provided with a notch (28) extending through the inside and outside.

9. The vacuum breaker according to claim 3, characterized in that: The one-way component (5) is a one-way duckbill membrane, and the bottom end of the positioning core (4) presses the outer edge of the one-way component (5) tightly against the inner bottom of the valve body (1).

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