Vacuum breaking pipe fitting
By installing a sealing cover and a locking assembly of breathable through holes on the drainage pipe joints, the problem of flattening or bursting caused by local vacuum in the drainage pipe is solved, and the air pressure balance inside and outside the drainage pipe is achieved, avoiding water seepage and structural damage.
Patent Information
- Application Number
- CN202422367991.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-27
AI Technical Summary
When the drainage pipes surge in drainage flow and drainage speed, local vacuum is prone to occur, causing the drainage pipes to flatten or burst, affecting the drainage effect and causing damage to the building structure.
The joint is equipped with a sealing cover and a breathable through hole, and is equipped with a slidable locking assembly. Under normal circumstances, the sealing plate closes the breathable through holes. When the air pressure inside and outside the drainage pipe is balanced, the air pressure through holes will be opened, and the external air enters the cavity to restore the air pressure balance.
Effectively avoid the drainage pipes from flattening or bursting due to local vacuum, ensure the normal operation of the drainage system and reduce the risk of seepage.
Smart Images
Figure CN223189792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drainage systems, and more specifically, to a vacuum breaking pipe fitting. Background Art
[0002] Drain pipes are used to remove sewage and wastewater from buildings and facilities. Currently, most buildings use PVC pipes. However, during heavy rain, the drainage flow and velocity of high-rise buildings can surge. This can easily create negative pressure inside the pipes, leading to a partial vacuum. This can cause the pipes to flatten or even burst, ultimately leading to drainage failures. When drain pipes flatten due to a partial vacuum, they clog the drainage system, compromising drainage effectiveness. When drain pipes burst, they can cause leaks, ultimately damaging the building structure and facilities. Utility Model Content
[0003] In response to the problem in the above-mentioned prior art that when the drainage flow and drainage speed increase sharply, local vacuum is easily generated in the drainage pipe, causing the drainage pipe to become flattened or even burst, the utility model provides a vacuum-breaking pipe fitting, which can achieve air pressure balance inside and outside the drainage pipe, thereby avoiding the occurrence of local vacuum inside the drainage pipe.
[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:
[0005] A vacuum-breaking pipe fitting comprises a joint, wherein the joint is provided with a water inlet, a cavity and a water outlet, the water inlet being connected with the water outlet through the cavity; the joint is also provided with an air inlet connected with the cavity, the air inlet is connected with a sealing cover, the sealing cover is provided with a guide cavity and a breathable through hole both of which are connected with the cavity; it also comprises a locking assembly, the locking assembly comprises a sliding column and an elastic member, the sliding column and the guide cavity are slidably connected along the axial direction of the guide cavity, the sliding column is provided with an abutment structure and a sealing plate, the abutment structure and the sealing plate are respectively located on both sides of the guide cavity, and the sealing plate closes the breathable through hole; one end of the elastic member is connected to the abutment structure, and the other end is connected to the sealing cover.
[0006] In the above technical solution, the water inlet and outlet of the joint are respectively used to connect two different drainage pipes. In the initial state, the blocking plate is tightly attached to the sealing cover, and the blocking plate blocks the air hole. When the drainage volume and drainage speed inside the drainage pipe increase sharply and cause negative pressure inside the drainage pipe, the negative pressure will generate an adsorption force on the blocking plate, causing the blocking plate to separate from the sealing cover, thereby exposing the air hole, and external air can enter the cavity of the joint through the air hole. At this time, the elastic member is in a compressed state; after the air pressure inside and outside the drainage pipe reaches equilibrium, the blocking plate is no longer subjected to the adsorption force, and the elastic member returns to its original state; when the elastic member returns to its original state, it applies an elastic force to the abutment structure, and the elastic force drives the abutment structure to move in the direction away from the blocking plate, thereby driving the sliding column to slide until the blocking plate abuts against the sealing cover and the air hole 202 is closed again. That is to say, under normal circumstances, the ventilation hole is closed by the sealing plate, and the inside and outside of the drainage pipe are not connected to each other. Only when negative pressure appears inside the drainage pipe, the sealing plate will detach from the sealing cover to open the ventilation hole, so that the outside air enters the cavity through the ventilation hole, so that the air pressure inside and outside the drainage pipe is balanced, and ultimately prevent the drainage pipe from becoming flat or bursting.
[0007] Preferably, a rubber sealing layer is provided on one side of the sealing plate close to the sealing cover. Providing the rubber sealing layer can improve the sealing effect of the sealing plate on the vent hole and reduce water seepage.
[0008] Preferably, a first conical surface is provided at one end of the ventilation hole near the blocking plate, and a second conical surface is provided on the rubber sealing layer structure, with the first conical surface and the second conical surface being in contact with each other. This can further improve the sealing performance of the connection between the rubber sealing layer and the ventilation hole, thereby further reducing the possibility of water seepage.
[0009] Preferably, a third conical portion is provided at one end of the guide cavity near the blocking plate, and a fourth conical portion is provided on the sliding post, the third conical portion being in contact with the fourth conical portion. The provision of the third and fourth conical portions can reduce the gap between the end of the guide cavity and the guide post without affecting the smooth sliding of the sliding post, thereby reducing the risk of water seepage.
[0010] Preferably, the joint includes a water pipe and a vent pipe, one end of the vent pipe being connected to the water pipe, the inner cavities of the water pipe and the vent pipe forming the cavity; the water inlet and the water outlet are respectively provided at the ends of the water pipe; and the vent pipe has an air inlet provided at the other end. This arrangement facilitates the production and processing of the joint, simplifies the production and processing procedures of the joint, and facilitates the placement of the sealing cover, thereby improving the sealing effect of the sealing cover.
[0011] Preferably, the axis of the vent pipe forms an angle of 10° to 80° with the axis of the water pipe. In practical applications, the vent pipe is tilted upward, which allows water vapor on the inner wall of the vent pipe to collect and flow back into the water pipe for discharge, and also prevents water from entering the vent pipe and affecting the normal operation of the blocking plate.
[0012] Preferably, the elastic member is a spring structure and is sleeved on the outside of the sliding column. Compared to elastic members made of elastic materials, spring structures have better elasticity and deformation capabilities. They can maintain stable performance after repeated loading and unloading, are less prone to fatigue, are more reliable, and have a longer service life.
[0013] Preferably, the sealing cover is provided with a stop ring whose axis coincides with the sliding post. The outer diameter of the stop ring is larger than the diameter of the sliding post, and the elastic member is sleeved onto the exterior of the stop ring. The provision of the stop ring prevents direct contact between the inner ring of the elastic member and the sliding post, thereby preventing mutual friction between the elastic member and the sliding post, thereby reducing the sliding resistance of the sliding post and alleviating wear on the outer circumferential surface of the sliding post.
[0014] Preferably, the sealing cover is threadedly connected to the joint. The threaded connection between the sealing cover and the joint facilitates quick assembly and disassembly of the sealing cover and the joint, and the threaded connection has better sealing performance.
[0015] Preferably, the sealing cover is provided with a gripping ring having a plurality of grooves on its outer circumferential surface and a plurality of protrusions on its top outer edge, wherein the plurality of grooves and the plurality of protrusions are respectively distributed circumferentially with the axis of the gripping ring as an array axis. Providing a gripping ring and providing the plurality of grooves and protrusions on the gripping ring facilitates the construction worker's gripping of the sealing cover for tightening, preventing hand slippage that could affect the tightening efficiency of the sealing cover 2.
[0016] The beneficial effects of the present invention are as follows: a sealing cover is provided on the joint, and a ventilation hole and a slidable locking assembly are provided on the sealing cover. Under normal circumstances, the sealing plate closes the ventilation hole. When negative pressure appears inside the drainage pipe, the locking assembly can slide until the sealing plate is separated from the sealing cover, so that the ventilation hole is opened, thereby allowing external air to enter the cavity through the ventilation hole, so that the air pressure inside and outside the drainage pipe is balanced, and finally the drainage pipe is prevented from becoming flat or bursting. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of a vacuum-breaking pipe from one perspective;
[0018] Figure 2 This is a structural diagram of a vacuum breaking pipe from another perspective;
[0019] Figure 3 It is a cross-sectional schematic diagram of the sealing cover and the locking assembly.
[0020] In the accompanying drawings: 1-connector; 101-water pipe; 1011-water inlet; 1012-water outlet; 1013-cavity; 102-vent pipe; 2-sealing cover; 201-guide cavity; 202-vent hole; 203-groove; 204-protrusion; 205-limiting convex ring; 206-external thread; 207-gripping ring; 3-sliding column; 301-fourth conical portion; 4-elastic member; 5-abutment structure; 6-sealing plate; 7-rubber sealing layer; 701-second conical portion. DETAILED DESCRIPTION
[0021] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:
[0024] Example 1
[0025] This embodiment is the first embodiment of a vacuum breaking pipe. Figures 1 to 3As shown, it includes a joint 1, which is provided with a water inlet 1011, a cavity 1013 and a water outlet 1012, and the water inlet 1011 is connected to the water outlet 1012 through the cavity 1013; the joint 1 is also provided with an air inlet connected to the cavity 1013, and the air inlet is connected to a sealing cover 2, and the sealing cover 2 is provided with a guide cavity 201 and a breathable through hole 202, both of which are connected to the cavity 1013, wherein there are two breathable through holes 202; the vacuum breaking pipe fitting also includes a locking assembly, which includes a sliding column 3 and an elastic member 4, the sliding column 3 and the guide cavity 201 are slidably connected along the axial direction of the guide cavity 201, and the sliding column 3 is provided with an abutment structure 5 and a sealing plate 6, which are respectively located on both sides of the guide cavity 201, and the sealing plate 6 closes the breathable through hole 202; one end of the elastic member 4 is connected to the abutment structure 5, and the other end is connected to the sealing cover 2.
[0026] Furthermore, the elastic member 4 is a spring structure and is sleeved on the outside of the sliding column 3. Compared with the elastic member 4 made of elastic material, the spring structure has better elasticity and deformation ability, and can still maintain stable performance after multiple loading and unloading, is not easy to fatigue, is more reliable, and has a longer service life.
[0027] The working principle or workflow of this embodiment is as follows: the water inlet 1011 and water outlet 1012 of the connector 1 are respectively used to connect two different drainage pipes. In the initial state, the blocking plate 6 is tightly attached to the sealing cover 2 and blocks the vent 202. When the drainage volume and drainage speed within the drainage pipe increase sharply, resulting in negative pressure within the drainage pipe, this negative pressure exerts an adsorption force on the blocking plate 6, causing it to separate from the sealing cover 2, thereby exposing the vent 202. External air can enter the cavity 1013 of the connector 1 through the vent 202. At this time, the elastic member 4 is in a compressed state. After the air pressure inside and outside the drainage pipe reaches equilibrium, the blocking plate 6 is no longer subjected to the adsorption force, and the elastic member 4 returns to its original state. When returning to its original state, the elastic member 4 exerts an elastic force on the abutment structure 5, which drives the abutment structure 5 away from the blocking plate 6, thereby driving the sliding post 3 to slide until the blocking plate 6 abuts against the sealing cover 2, sealing the vent 202 again. That is to say, under normal circumstances, the air hole 202 is closed by the sealing plate 6, and the inside and outside of the drainage pipe are not connected to each other. Only when negative pressure appears inside the drainage pipe, the sealing plate 6 will separate from the sealing cover 2 to open the air hole 202, so that the external air enters the cavity 1013 through the air hole 202, so that the air pressure inside and outside the drainage pipe is balanced, thereby preventing the drainage pipe from becoming flat or bursting.
[0028] The beneficial effects of this embodiment are as follows: by arranging a sealing cover on the joint, and arranging a ventilation hole and a slidable locking assembly on the sealing cover, under normal circumstances the sealing plate will close the ventilation hole. When negative pressure appears inside the drainage pipe, the locking assembly can slide until the sealing plate is separated from the sealing cover, so that the ventilation hole is opened, thereby allowing external air to enter the cavity through the ventilation hole, so that the air pressure inside and outside the drainage pipe is balanced, and ultimately the drainage pipe is prevented from becoming flat or bursting.
[0029] Example 2
[0030] This embodiment is a second embodiment of a vacuum breaking pipe. This embodiment is similar to the first embodiment, except that Figure 3 As shown, a rubber sealing layer 7 is provided on one side of the sealing plate 6 close to the sealing cover 2. The rubber sealing layer 7 can improve the sealing effect of the sealing plate 6 on the vent hole 202 and reduce water seepage.
[0031] Furthermore, a first conical surface is provided on one end of the vent hole 202 near the sealing plate 6, and a second conical surface 701 is provided on the rubber sealing layer 7. The first conical surface is in contact with the second conical surface 701. This further improves the sealing performance of the connection between the rubber sealing layer 7 and the vent hole 202, thereby further reducing the possibility of water seepage.
[0032] Furthermore, a third conical portion is provided at one end of the guide cavity 201 near the sealing plate 6, and a fourth conical portion 301 is provided on the sliding post 3, with the third conical portion and the fourth conical portion 301 being in contact with each other. The provision of the third and fourth conical portions 301 can reduce the gap between the end of the guide cavity 201 and the guide post without affecting the smooth sliding of the sliding post 3, thereby reducing the risk of water seepage.
[0033] Further, combined with Figure 1 and Figure 2 As shown, the connector 1 includes a water pipe 101 and a vent pipe 102. The bottom end of the vent pipe 102 is connected to the water pipe 101, and the inner cavities of the water pipe 101 and the vent pipe 102 form a cavity 1013. A water inlet 1011 and a water outlet 1012 are respectively provided at the two ends of the water pipe 101; and the vent pipe 102 is provided at the top end of the vent pipe. This arrangement facilitates the production and processing of the connector 1, simplifies the production and processing steps of the connector 1, and facilitates the arrangement of the sealing cover 2, which is conducive to improving the sealing effect of the sealing cover 2.
[0034] Furthermore, the axis of the vent pipe 102 forms a 45° angle with the axis of the water pipe 101. In actual use, the vent pipe 102 is tilted upward, which allows water vapor on the inner wall of the vent pipe 102 to gather and flow back into the water pipe 101 for discharge, and also prevents water from entering the vent pipe 102 and affecting the normal operation of the blocking plate 6.
[0035] Other features, working principles and beneficial effects of this embodiment are consistent with those of embodiment 1.
[0036] Example 3
[0037] This embodiment is a third embodiment of a vacuum breaking pipe. This embodiment is similar to the second embodiment, except that: Figure 3 As shown, the sealing cover 2 is provided with a stop ring 205 whose axis coincides with the sliding post 3. The outer diameter of the stop ring 205 is larger than the diameter of the sliding post 3, and the elastic member 4 is sleeved on the outer portion of the stop ring 205. The provision of the stop ring 205 prevents direct contact between the inner ring of the elastic member 4 and the sliding post 3, thereby preventing mutual friction between the elastic member 4 and the sliding post 3, thereby reducing the sliding resistance of the sliding post 3 and reducing wear on the outer circumferential surface of the sliding post 3.
[0038] Further, combined with Figures 1 to 3 As shown, the sealing cap 2 is threadedly connected to the connector 1. Specifically, the sealing cap 2 is provided with external threads 206, which are threadedly connected to the inner wall of the air inlet. The threaded connection between the sealing cap 2 and the connector 1 facilitates quick assembly and disassembly of the sealing cap 2 and the connector 1, and the threaded connection provides a better sealing performance.
[0039] Furthermore, the sealing cover 2 is provided with a gripping ring 207 having a plurality of grooves 203 on its outer circumferential surface and a plurality of protrusions 204 on its top outer edge. The plurality of grooves 203 and the plurality of protrusions 204 are distributed circumferentially with the axis of the gripping ring 207 as an array axis. The provision of the gripping ring 207 and the plurality of grooves 203 and protrusions 204 on the gripping ring 207 facilitates the construction worker's grip on the sealing cover 2 for tightening, preventing hand slippage that could affect the tightening efficiency of the sealing cover 2.
[0040] Other features, working principles and beneficial effects of this embodiment are consistent with those of Example 2.
[0041] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description, and it is not necessary and impossible to provide an exhaustive list of all implementation methods. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A vacuum breaker pipe fitting, comprising a joint (1), wherein the joint (1) is provided with a water inlet (1011), a cavity (1013) and a water outlet (1012), wherein the water inlet (1011) is connected to the water outlet (1012) through the cavity (1013); characterized in that: The joint (1) is also provided with an air inlet connected to the cavity (1013), and the air inlet is connected to a sealing cover (2), and the sealing cover (2) is provided with a guide cavity (201) and a breathable hole (202) both of which are connected to the cavity (1013); it also includes a locking component, and the locking component includes a sliding column (3) and an elastic member (4), the sliding column (3) and the guide cavity (201) are slidably connected along the axial direction of the guide cavity (201), and the sliding column (3) is provided with an abutment structure (5) and a blocking plate (6), the abutment structure (5) and the blocking plate (6) are respectively located on both sides of the guide cavity (201), and the blocking plate (6) blocks the breathable hole (202); one end of the elastic member (4) is connected to the abutment structure (5), and the other end is connected to the sealing cover (2).
2. A vacuum breaking pipe fitting according to claim 1, characterized in that: A rubber sealing layer (7) is provided on one side of the sealing plate (6) close to the sealing cover (2).
3. A vacuum breaking pipe fitting according to claim 2, characterized in that: The ventilation hole (202) is provided with a first conical surface portion at one end close to the blocking plate (6), and the rubber sealing layer (7) is provided with a second conical surface portion (701), and the first conical surface portion and the second conical surface portion (701) are in contact with each other.
4. The vacuum breaking pipe fitting according to claim 1, characterized in that: The guide cavity (201) is provided with a third conical surface at one end close to the blocking plate (6), and the sliding column (3) is provided with a fourth conical surface (301), and the third conical surface is fitted with the fourth conical surface (301).
5. The vacuum breaking pipe fitting according to claim 1, characterized in that: The joint (1) comprises a water pipe (101) and a vent pipe (102); one end of the vent pipe (102) is connected to the water pipe (101); the inner cavity of the water pipe (101) and the inner cavity of the vent pipe (102) form the cavity (1013); the water inlet (1011) and the water outlet (1012) are respectively arranged at the two ends of the water pipe (101); and the air inlet is arranged at the other end of the vent pipe (102).
6. The vacuum breaking pipe fitting according to claim 5, characterized in that: An included angle of 10° to 80° is formed between the axis of the ventilation pipe (102) and the axis of the water pipe (101).
7. The vacuum breaking pipe fitting according to claim 1, characterized in that: The elastic member (4) is a spring structure and is sleeved on the outside of the sliding column (3).
8. The vacuum breaking pipe fitting according to claim 7, characterized in that: The sealing cover (2) is provided with a limiting convex ring (205) whose axis coincides with the sliding column (3); the outer diameter of the limiting convex ring (205) is larger than the diameter of the sliding column (3); and the elastic member (4) is sleeved on the outside of the limiting convex ring (205).
9. The vacuum breaking pipe fitting according to claim 1, characterized in that: The sealing cover (2) is threadedly connected to the joint (1).
10. A vacuum breaking pipe fitting according to any one of claims 1 to 9, characterized in that: The sealing cover (2) is provided with a gripping ring (207), the outer circumferential surface of the gripping ring (207) is provided with a plurality of grooves (203), and the top outer edge of the gripping ring (207) is provided with a plurality of protrusions (204), and the plurality of grooves (203) and the plurality of protrusions (204) are respectively distributed around the circumference with the axis of the gripping ring (207) as the array axis.