CN213298953U - Vacuum breaker - Google Patents
Vacuum breaker Download PDFInfo
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- CN213298953U CN213298953U CN202022020021.3U CN202022020021U CN213298953U CN 213298953 U CN213298953 U CN 213298953U CN 202022020021 U CN202022020021 U CN 202022020021U CN 213298953 U CN213298953 U CN 213298953U
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- elastic diaphragm
- vacuum breaker
- valve core
- fluid
- fluid chamber
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Abstract
A vacuum breaker comprises a valve core and an elastic membrane, wherein the valve core comprises an assembling part and a clamping part, a connecting shaft is arranged between the assembling part and the clamping part, a through hole is formed in the cavity wall of a fluid cavity, and the connecting shaft penetrates through the through hole and can move along the axial direction; the elastic diaphragm is sleeved at the assembly part of the valve core, and a plurality of radially outward-protruding arc-shaped diaphragms are uniformly arranged on the outer periphery of the elastic diaphragm along the circumferential direction; when fluid is arranged in the fluid chamber, the elastic diaphragm is extruded into a plane structure under the action of fluid pressure, the lower end face of the elastic diaphragm is tightly attached to the inner wall of the fluid chamber to seal the through hole, when negative pressure is formed in the fluid chamber, the elastic diaphragm is upwards arched under the action of atmospheric pressure to recover into an umbrella-shaped structure and drive the valve core to move towards the inside of the fluid chamber along the axial direction, and an overflowing gap is formed between a radial inwards concave part between two adjacent arc-shaped diaphragms and the inner wall of the chamber. The utility model discloses an optimize the structure and the assembly mode of vacuum breaker, effectively improved its suitability and sensitivity.
Description
Technical Field
The utility model belongs to the technical field of the vacuum destruction, concretely relates to vacuum breaker.
Background
The vacuum breaker is mostly arranged in a fluid chamber of a valve body and a fluid pipeline so as to avoid negative pressure generated in the fluid chamber to cause fluid backflow, the conventional vacuum breaker is mostly opened and closed by arranging a compression spring, so that the spring can be compressed to open the vacuum breaker to break the vacuum state of the fluid chamber by generating enough negative pressure in the fluid chamber, and the sensitivity for detecting and breaking the vacuum state is not enough; in addition, the existing vacuum breaker has a complex structure, is integrally installed in the fluid cavity, occupies a large amount of installation space, is complex to assemble, has requirements on the installation structure in the fluid cavity, and has poor adaptability.
Disclosure of Invention
The utility model discloses to the problem that vacuum breaker structure is complicated among the prior art, occupation space is big, the suitability is poor, sensitivity is low, provide a vacuum breaker, through the improvement to its structure and mounting means, effectively solve above-mentioned technical problem.
The invention aims to be realized by the following technical scheme:
a vacuum breaker comprises a valve core and an elastic membrane, wherein the valve core comprises an assembly part arranged inside a fluid cavity and a clamping part arranged outside the fluid cavity; the elastic diaphragm is sleeved on the assembly part of the valve core through a central hole formed in the center of the elastic diaphragm, a plurality of radially outwards-protruding arc-shaped diaphragms are uniformly arranged on the outer periphery of the elastic diaphragm along the circumferential direction, and the arc-shaped diaphragms are continuously arranged; when fluid is arranged in the fluid chamber, the elastic diaphragm is extruded into a plane structure under the action of fluid pressure, the lower end face of the elastic diaphragm is tightly attached to the inner wall of the fluid chamber to seal the through hole, when negative pressure is formed in the fluid chamber, the elastic diaphragm is upwards arched under the action of atmospheric pressure to recover into an umbrella-shaped structure and drive the valve core to move towards the inside of the fluid chamber along the axial direction, and an overflowing gap is formed between a radial inwards concave part between two adjacent arc-shaped diaphragms and the inner wall of the chamber.
According to the scheme, the structure of the vacuum breaker is simplified through the improvement of the valve core and the elastic membrane, part of the vacuum breaker is arranged inside the fluid cavity, and part of the vacuum breaker is arranged outside the fluid cavity, so that the vacuum breaker occupies small space and is easy to assemble; the assembling part of the valve core is used for installing an elastic membrane, and the clamping part is used for limiting the axial movement distance of the valve core and preventing the valve core from completely retracting into the fluid chamber; the structure of the elastic diaphragm is optimized, so that the elastic diaphragm can realize sealing and vacuum breaking on the fluid chamber through elastic deformation, the arc-shaped diaphragms can be tightly attached to a wall to seal the through holes when the elastic diaphragm is in a planar structure, and when the elastic diaphragm is arched and restored to an umbrella-shaped structure, an overflowing gap can be formed between the adjacent arc-shaped diaphragms to break vacuum; as long as negative pressure exists in the fluid chamber, the vacuum breaker can be opened to break the vacuum state by atmospheric pressure only by overcoming the elastic deformation force of the elastic diaphragm, and the vacuum breaker is simple, reliable and high in sensitivity.
Preferably, the assembly part comprises a butt boss positioned at the upper end of the lock cylinder and a reducing section positioned between the butt boss and the connecting shaft, the outer diameter of the reducing section is smaller than the outer diameters of the butt boss and the connecting shaft so as to form an annular mounting groove, and the elastic diaphragm is sleeved in the annular mounting groove. The elastic diaphragm can be assembled by the abutting lug bosses which are matched with the connecting shaft, and the structure is simple and easy to assemble; the elastic membrane is arranged below the abutting boss, and the elastic membrane can apply upward force to the abutting boss when deforming and moving upwards, so that the whole valve core is driven to move towards the inside of the fluid chamber.
Preferably, the outer diameter of the reducing section is matched with the aperture of the central hole of the elastic diaphragm, and the length of the reducing section is matched with the thickness of the elastic diaphragm. The degree of cooperation of the elastic diaphragm and the valve core can be improved while the installation stability of the elastic diaphragm is improved by the above arrangement, so that the sensitivity of the vacuum breaker is improved.
Preferably, the abutment boss is circular truncated cone-shaped, and the outer diameter thereof is larger than the outer diameter of the connecting shaft but smaller than the outer diameter of the elastic diaphragm. The abutting boss is in a round table shape, so that the contact surface of the abutting boss and the elastic membrane is a plane, and the elastic membrane can apply force to the abutting boss conveniently; the outer diameter of the abutting table is larger than that of the connecting shaft, so that the abutting boss has enough stress area to ensure that the elastic diaphragm can jack the valve core; the outer diameter of the abutting boss is smaller than that of the elastic diaphragm so as to avoid the deformation limitation of the elastic diaphragm.
Preferably, the clamping part comprises an end cap positioned at the lower end of the valve core and an annular clamping groove formed between the end cap and the connecting shaft, and a clamping spring is clamped in the annular clamping groove to limit the axial movement distance of the connecting shaft. The clamping part adopts the structure, the limiting of the valve core can be realized, the clamp spring can be installed outside the fluid cavity, the assembly is convenient, the internal structure of the fluid cavity is not influenced, and the adaptability of the vacuum breaker is improved.
Preferably, the clamp spring comprises a clamp ring and clamping jaws arranged on the inner circumferential surface of the clamp ring, and the clamping jaws are uniformly arranged along the circumferential direction of the clamp ring and extend downwards towards the center to be clamped in the annular clamping groove. The clamp spring with the structure is reliable in clamping, and can ensure that the valve core is uniformly stressed and improve the matching degree of the valve core and the elastic diaphragm.
Preferably, the valve core is integrally formed and is arranged coaxially with the through hole. The valve core formed integrally is convenient to manufacture and assemble.
Preferably, at least part of the cavity wall of the fluid cavity is of a planar structure, and the through hole is formed in the cavity wall of the planar structure. The cavity wall of the planar structure is more beneficial to sealing the through hole by the elastic membrane, so that the reliability of the vacuum breaker is improved.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) through the improvement to vacuum breaker structure and assembly method, effectively improved its suitability, only need set up a aperture on the chamber wall of fluid cavity and can realize the installation, do not have specific requirement to the inner structure of fluid cavity, the suitability is high, easily assembles.
(2) Through optimizing the structure of elastic diaphragm, make it can realize sealing and breaking vacuum to the fluid cavity through elastic deformation, need not to set up other reset part separately again, simple structure is reliable, and when producing the negative pressure in the fluid cavity, atmospheric pressure only need overcome elastic deformation power of elastic diaphragm and can make the vacuum destroyer open and destroy the vacuum state to improve the sensitivity of vacuum destroyer.
(3) The vacuum breaker is partially installed inside the fluid strong chamber, partially installed outside the fluid chamber, high in matching degree of the elastic membrane and the valve core, easy to assemble, capable of saving installation space and free of damaging the internal structure of the fluid chamber.
Drawings
FIG. 1 is a schematic view of a vacuum breaker;
FIG. 2 is a schematic structural diagram of a solenoid valve;
FIG. 3 is a schematic view of the vacuum breaker in an open state;
FIG. 4 is a schematic view of the vacuum breaker in a closed state;
FIG. 5 is a schematic view of a valve cartridge;
FIG. 6 is a schematic view of the structure of the elastic diaphragm;
FIG. 7 is a schematic view of a clamp spring structure;
the labels in the figure are: a valve core 10; an abutment boss 11; a reducing section 12; a connecting shaft 13; a ring card slot 14; an end cap 15; an elastic diaphragm 20; a central bore 21; an arc-shaped flap 22; a clamp spring 30; a snap ring 31; the jaws 32; a solenoid valve 40; a fluid chamber 41; a check valve 42; a bottom wall 411.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
example 1
As shown in fig. 1 to 7, the present embodiment discloses a vacuum breaker, which is installed through a through hole opened on the wall of a fluid chamber 41, the fluid chamber 41 may be a chamber in a valve body or a chamber in a fluid pipeline, the fluid chamber 41 in the present embodiment is disposed at a water inlet of a solenoid valve 40, and the vacuum breaker is disposed near the water inlet of the solenoid valve 40 to prevent water from flowing back.
The bottom wall 411 of the fluid chamber 41 is a planar structure, and a through hole is formed on the bottom wall 411; the vacuum breaker comprises a valve core 10 and an elastic membrane 20, wherein the valve core 10 is integrally formed and comprises an assembling portion arranged in a fluid cavity and a clamping portion arranged outside a fluid cavity 41, a connecting shaft 13 is arranged between the assembling portion and the clamping portion, the connecting shaft 13 penetrates through a through hole and can move along the axial direction, the assembling portion of the valve core 10 is used for installing the elastic membrane 20, and the clamping portion is used for limiting the distance of the valve core 10 moving along the axial direction and preventing the valve core 10 from completely retracting into the fluid cavity 41.
The assembling part comprises an abutting boss 11 positioned at the upper end of the lock cylinder and a reducing section 12 positioned between the abutting table and a connecting shaft 13, the outer diameter of the reducing section 12 is smaller than the outer diameters of the abutting boss 11 and the connecting shaft 13 so as to form an annular mounting groove, the elastic diaphragm 20 is sleeved in the annular mounting groove through a central hole 21 formed in the center of the elastic diaphragm 20, in order to improve the mounting stability of the elastic diaphragm 20 and the matching degree of the elastic diaphragm 20 and the valve core 10, the outer diameter of the reducing section 12 is matched with the aperture of the central hole 21 of the elastic diaphragm 20, and the length of the reducing section 12 is matched with the thickness of the elastic diaphragm 20; the abutting boss 11 is in a circular truncated cone shape, the outer diameter of the abutting boss is larger than that of the connecting shaft 13 but smaller than that of the elastic membrane 20, and the abutting boss 11 is in a circular truncated cone shape, so that the contact surface of the abutting boss and the elastic membrane 20 is a plane, and the elastic membrane 20 can apply force to the abutting boss conveniently; the outer diameter of the abutting table is larger than that of the connecting shaft 13, so that the abutting boss 11 has enough stress area to ensure that the elastic diaphragm 20 can jack the valve core 10; the outer diameter of the abutting boss 11 is smaller than the outer diameter of the elastic diaphragm 20, specifically, the abutting boss 11 at least does not cover the arc diaphragm 22, and the above arrangement can effectively avoid the elastic diaphragm 20 from being deformed and limited, so as to improve the reliability of the vacuum breaker.
The clamping part comprises an end cap 15 positioned at the lower end of the valve core 10 and an annular clamping groove 14 formed between the end cap 15 and the connecting shaft 13, a clamp spring 30 is clamped in the annular clamping groove 14 to limit the axial movement distance of the connecting shaft 13, the clamping part adopts the structure, the valve core 10 can be limited, the clamp spring 30 can be installed outside the fluid cavity 41, the assembly is convenient, the internal structure of the fluid cavity 41 is not influenced, and the adaptability of the vacuum breaker is improved; the clamp spring 30 comprises a clamp ring 31 and clamping claws 32 arranged on the inner peripheral surface of the clamp ring 31, the clamping claws 32 are uniformly arranged along the circumferential direction of the clamp ring 31 and extend downwards towards the center to be clamped in the annular clamping groove 14, the clamp spring 30 adopting the structure is reliable in clamping, the uniform stress of the valve core 10 can be ensured, and the matching degree of the valve core 10 and the elastic diaphragm 20 is improved.
The elastic diaphragm 20 is made of rubber, a plurality of arc-shaped diaphragms 22 protruding outwards in the radial direction are uniformly arranged on the outer periphery of the elastic diaphragm 20 along the circumferential direction, the arc-shaped diaphragms 22 are continuously arranged, the elastic diaphragm 20 in the embodiment has six arc-shaped diaphragms 22, the six arc-shaped diaphragms are of umbrella-shaped structures with middle parts being arched upwards in a natural state, and the six arc-shaped diaphragms can be changed into plane structures under a pressed state; in combination with the present embodiment, when water is present in the fluid chamber 41 of the electromagnetic valve 40 near the water inlet, the elastic diaphragm 20 is squeezed into a planar structure under the action of water pressure, and the lower end surface of the elastic diaphragm is closely attached to the inner wall of the fluid chamber 41 to seal the through hole, when water is cut off or other special conditions occur, and negative pressure is generated in the fluid chamber 41, the elastic diaphragm 20 arches upward under the action of atmospheric pressure to recover into an umbrella-shaped structure, and drives the valve core 10 to move axially toward the interior of the fluid chamber 41, an overflow gap is formed between the radially inward concave portion between two adjacent arc-shaped diaphragms 22 and the inner wall of the chamber, air can enter the fluid chamber 41 through the overflow gap, and the negative pressure state is destroyed, so as to avoid. In this embodiment, a check valve 42 is installed at a position of the solenoid valve 40 close to the water outlet, and if the check valve 42 fails, the water in the fluid chamber 41 will flow out through the through hole on the chamber wall, thereby giving an early warning in time.
The utility model discloses a vacuum breaker simple structure, easy assembly, its part is installed in the strong indoor portion of fluid, the part is installed outside fluid cavity 41, save the installation space, can not destroy the internal structure of fluid cavity 41; the adaptability is high, the installation can be realized only by arranging a small hole on the cavity wall of the fluid cavity 41, and no specific requirement is required on the internal structure of the fluid cavity 41; the sensitivity is high, through the optimization to elastic diaphragm 20 structure, can realize sealed and broken vacuum to fluid chamber 41 through elastic deformation of elastic diaphragm 20, and when producing the negative pressure in fluid chamber 41, atmospheric pressure only need overcome elastic deformation power of elastic diaphragm 20 and can make the vacuum breaker open and destroy the vacuum state.
It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e., in a manner equivalent to "including at least … …", and not in a closed manner, i.e., in a manner not to be interpreted as "including only … …".
The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.
Claims (8)
1. A vacuum breaker is characterized by comprising a valve core and an elastic membrane, wherein the valve core comprises an assembly part arranged inside a fluid cavity and a clamping part arranged outside the fluid cavity;
the elastic diaphragm is sleeved on the assembly part of the valve core through a central hole formed in the center of the elastic diaphragm, a plurality of radially outwards-protruding arc-shaped diaphragms are uniformly arranged on the outer periphery of the elastic diaphragm along the circumferential direction, and the arc-shaped diaphragms are continuously arranged; when fluid is arranged in the fluid chamber, the elastic diaphragm is extruded into a plane structure under the action of fluid pressure, the lower end face of the elastic diaphragm is tightly attached to the inner wall of the fluid chamber to seal the through hole, when negative pressure is formed in the fluid chamber, the elastic diaphragm is upwards arched under the action of atmospheric pressure to recover into an umbrella-shaped structure and drive the valve core to move towards the inside of the fluid chamber along the axial direction, and an overflowing gap is formed between a radial inwards concave part between two adjacent arc-shaped diaphragms and the inner wall of the chamber.
2. The vacuum breaker according to claim 1, wherein the fitting portion includes an abutment boss at an upper end of the lock cylinder, and a reduced diameter section between the abutment boss and the connecting shaft, the reduced diameter section having an outer diameter smaller than outer diameters of the abutment boss and the connecting shaft to form an annular mounting groove in which the elastic diaphragm is fitted.
3. A vacuum breaker according to claim 2, wherein the outside diameter of the reduced diameter section matches the diameter of the central hole of the elastic diaphragm, and the length of the reduced diameter section matches the thickness of the elastic diaphragm.
4. The vacuum breaker of claim 2 wherein said abutment boss is frustoconical and has an outer diameter greater than the outer diameter of the connecting shaft but less than the outer diameter of the elastomeric membrane.
5. The vacuum breaker according to claim 1, wherein the locking portion comprises an end cap at a lower end of the valve body, and a ring groove formed between the end cap and the connecting shaft, and a snap spring is locked in the ring groove to limit an axial movement distance of the connecting shaft.
6. The vacuum breaker according to claim 5, wherein the clamp spring comprises a clamp ring and clamping claws arranged on the inner circumferential surface of the clamp ring, and the clamping claws are uniformly arranged along the circumferential direction of the clamp ring and extend downwards towards the center to be clamped in the annular clamping groove.
7. A vacuum breaker according to any one of claims 1 to 6 wherein the valve core is formed integrally and is located coaxially with the through bore.
8. A vacuum breaker according to claim 1, wherein the walls of the fluid chamber are at least partially planar, and the through-holes are provided in the walls of the planar structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022020021.3U CN213298953U (en) | 2020-09-15 | 2020-09-15 | Vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022020021.3U CN213298953U (en) | 2020-09-15 | 2020-09-15 | Vacuum breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213298953U true CN213298953U (en) | 2021-05-28 |
Family
ID=76030987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022020021.3U Active CN213298953U (en) | 2020-09-15 | 2020-09-15 | Vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213298953U (en) |
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2020
- 2020-09-15 CN CN202022020021.3U patent/CN213298953U/en active Active
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