CN219139950U - Spring reset vacuum breaker - Google Patents
Spring reset vacuum breaker Download PDFInfo
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- CN219139950U CN219139950U CN202320066048.7U CN202320066048U CN219139950U CN 219139950 U CN219139950 U CN 219139950U CN 202320066048 U CN202320066048 U CN 202320066048U CN 219139950 U CN219139950 U CN 219139950U
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- valve
- air inlet
- spring
- valve clack
- vacuum breaker
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Abstract
The utility model relates to a spring reset vacuum breaker which comprises a valve body, a valve clack and a valve cover, wherein the valve body is provided with an air inlet, the valve clack moves towards the air inlet and leaves or pushes against the air inlet, a reset spring is arranged between the valve clack and the valve cover, and the valve clack pushes against the air inlet under the action of the reset spring. The beneficial effects of the utility model are as follows: the valve clack is driven to be closed by the reset spring, the reset spring has proper elastic force, the valve clack can be sensitively opened when the system is in a vacuum state, and the valve clack can be safely and reliably closed after the vacuum state is eliminated, so that the safe and effective work of the vacuum breaker is ensured, the installation condition of the vacuum breaker is improved, and the vacuum breaker is not limited to a vertical installation state.
Description
Technical Field
The utility model relates to a pipeline negative pressure prevention device, in particular to a spring return vacuum breaker.
Background
The vacuum breaker is widely applied to a system needing to avoid vacuum generation, the air protection system is timely sucked when the system forms negative pressure, and the vacuum breaker can be automatically opened to break the vacuum effect when the pipeline or the container generates negative pressure or the vacuum is gradually increased due to the operation or the stop of the system, so that the pipeline and other equipment are prevented from being shrunken, cracked and the like, and the safety of the equipment is protected. The current common vacuum breaker adopts a structure with a downward air inlet, and the valve clack closes the air inlet by natural gravity, but the vacuum breaker with the structure needs to be vertically arranged in a pipeline system. In addition, after long-term use, the valve clack may have a phenomenon of slow reaction and not timely and effectively closing.
Disclosure of Invention
The utility model aims to provide a spring return vacuum breaker, which can be safely and reliably closed and improve installation conditions.
In order to achieve the above object, the technical scheme of the present utility model is as follows: the utility model provides a spring return vacuum breaker, includes valve body, valve clack and valve gap, the valve body is equipped with the air inlet, the valve clack orientation the air inlet removes, leaves or pushes against the air inlet be equipped with reset spring between valve clack and the valve gap, the valve clack pushes against under reset spring's effect the air inlet.
Furthermore, in order to flexibly move the valve clack, the valve cover is provided with a core bar, the valve clack is provided with a core sleeve, the core sleeve is in sliding fit with the core bar, and the reset spring is sleeved on the core sleeve.
Still further, a preferred return spring property is that the return spring rate is 2.1N/mm with a maximum deflection of 16mm.
Still further, a preferred return spring structure is that the wire diameter of the return spring is 1.0mm, the pitch diameter is 9mm, the free height is 29mm, the initial working height is 23.8mm, and the effective number of turns is 6.5.
Furthermore, in order to obtain a good sealing effect, the valve clack is provided with a polytetrafluoroethylene sealing gasket.
The beneficial effects of the utility model are as follows: the valve clack is driven to be closed by the reset spring, the reset spring has proper elastic force, the valve clack can be sensitively opened when the system is in a vacuum state, and the valve clack can be safely and reliably closed after the vacuum state is eliminated, so that the safe and effective work of the vacuum breaker is ensured, the installation condition of the vacuum breaker is improved, and the vacuum breaker is not limited to a vertical installation state.
The utility model is described in detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of the present utility model, with the valve flap closed;
FIG. 3 is a cross-sectional view of the present utility model, with the valve flap open;
fig. 4 is a schematic view showing the inclined installation of the vacuum breaker of the present utility model.
Detailed Description
As shown in fig. 1 to 3, a spring return vacuum breaker comprises a valve body 10, a valve clack 20 and a valve cover 30, wherein the valve body is provided with an air inlet 11, the valve clack moves towards the air inlet and leaves or pushes against the air inlet, a return spring 40 is arranged between the valve clack and the valve cover, and the valve clack pushes against the air inlet under the action of the return spring.
The valve cover is provided with a core bar 31, the valve clack is provided with a core sleeve 21, the core sleeve is in sliding fit with the core bar, and the reset spring is sleeved on the core sleeve.
The spring rate of the return spring is 2.1N/mm, and the maximum deformation is 16mm.
The wire diameter of the reset spring is 1.0mm, the pitch diameter is 9mm, the free height is 29mm, the initial working height is 23.8mm, and the effective number of turns is 6.5.
The valve clack is provided with a polytetrafluoroethylene sealing gasket 22.
Embodiment one:
as shown in fig. 1 to 3, a spring return vacuum breaker includes a valve body 10, a valve flap 20 and a valve cover 30, between which a return spring 40 is provided.
The valve body 10 is provided with a mounting interface 12 for mounting, the mounting interface is provided with a connecting thread 13, an air inlet 11 and an air flow channel 14 are arranged in the valve body, and the air inlet 11 is communicated with the mounting interface 12 through the air flow channel 14. In this embodiment, the diameter d=18 mm of the through hole of the air inlet, and the through hole area of the air inlet is 2.54 square centimeters.
A valve cap 30 is mounted on the top end of the valve body, the valve cap being provided with a core rod 31. A sealing ring 32 is provided between the valve stem and the valve body.
The valve clack 20 is arranged between the valve body 10 and the valve cover 30, the valve clack is provided with a core sleeve 21, and the core sleeve 21 is in sliding fit with the core rod 31, so that the valve clack 20 moves towards the air inlet 11 and leaves or pushes the air inlet 11. The valve clack is equipped with polytetrafluoroethylene material's sealed pad 22, and sealed pad 22 and air inlet contact, and sealed pad 22 can effectually realize quick sealed effect, possesses the absorbing effect simultaneously, protection pipeline, noise reduction.
The return spring 40 is sleeved on the core sleeve 21, and the valve clack 20 pushes the air inlet 11 under the action of the return spring. The performance of the return spring has important influence on the opening and closing of the valve clack, if the elastic acting force of the return spring is too large, the opening performance of the valve clack can be influenced, and the valve clack can be opened in a larger vacuum state; if the elastic acting force of the return spring is too small, the closing performance of the valve clack can be affected, and the valve clack cannot be effectively and reliably closed. In this embodiment, the wire diameter of the return spring 40 is 1.0mm, the pitch diameter is 9mm, the effective number of turns is 6.5, the free height is 29mm, and the initial working height is 23.8mm. The spring rate of the return spring 40 is 2.1N/mm, and the maximum deformation is 16mm. Through experiments, the return spring can enable the valve clack to have good opening and closing functions, and the use condition of the vacuum breaker is met.
As shown in fig. 2, in the state that the pipe is in a positive pressure state, the return spring 40 presses the valve clack against the air inlet 11, and the positive pressure in the pipe further makes the valve clack closely contact with the air inlet to reliably seal the air inlet.
As shown in fig. 3, when the duct is in a negative pressure state, the atmospheric pressure pushes the valve flap to move toward the valve cover against the self gravity and the pressure of the return spring, so that the air inlet is opened, air enters the duct through the air flow channel 14, and the negative pressure in the duct is eliminated. After the negative pressure of the pipeline is eliminated, the valve clack closes the air inlet again under the action of the return spring, so that the medium in the pipeline is prevented from leaking.
The valve clack is driven to close by adopting the return spring, the return spring has proper elastic force, the valve clack can be sensitively opened when the system is in a vacuum state, the valve clack can be safely and reliably closed after the vacuum state is eliminated, the safe and effective work of the vacuum breaker is ensured, the mounting condition of the vacuum breaker is improved, the vacuum breaker is not limited to a vertical mounting state, and as shown in fig. 4, the vacuum breaker is obliquely mounted on the pipeline 50, and the effective opening and closing functions can still be obtained.
Claims (5)
1. The utility model provides a spring return vacuum breaker, includes valve body, valve clack and valve gap, the valve body is equipped with the air inlet, the valve clack orientation the air inlet removes, leaves or pushes up the air inlet, its characterized in that be equipped with reset spring between valve clack and the valve gap, the valve clack pushes up under reset spring's effect the air inlet.
2. The spring return vacuum interrupter of claim 1 wherein said valve cover is provided with a core pin, said valve flap is provided with a core sleeve, said core sleeve is in sliding engagement with said core pin, said return spring is sleeved on said core sleeve.
3. A spring return vacuum interrupter according to claim 1, wherein the return spring rate is 2.1N/mm with a maximum deflection of 16mm.
4. A spring return vacuum breaker according to claim 1 wherein the return spring has a wire diameter of 1.0mm, a pitch diameter of 9mm, a free height of 29mm, an initial working height of 23.8mm and an effective number of turns of 6.5.
5. A spring return vacuum interrupter as defined in claim 1 wherein said valve flap is provided with a polytetrafluoroethylene seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320066048.7U CN219139950U (en) | 2023-01-10 | 2023-01-10 | Spring reset vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320066048.7U CN219139950U (en) | 2023-01-10 | 2023-01-10 | Spring reset vacuum breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219139950U true CN219139950U (en) | 2023-06-06 |
Family
ID=86593047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320066048.7U Active CN219139950U (en) | 2023-01-10 | 2023-01-10 | Spring reset vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219139950U (en) |
-
2023
- 2023-01-10 CN CN202320066048.7U patent/CN219139950U/en active Active
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