Anti-overflow three-way pipe

Abstract

The utility model relates to the field of PVC (polyvinyl chloride) pipe fittings, in particular to an anti-reverse-overflow three-way pipe which comprises a three-way pipe main body, the three-way pipe main body comprises a first pipe fitting arranged along the vertical direction and a second pipe fitting fixed on the first pipe fitting, the first pipe fitting is communicated with the second pipe fitting, and the anti-reverse-overflow three-way pipe further comprises a hollow base and a sealing piece. The bottom end of the first pipe fitting is communicated with the upper end of the base, the sealing element is of a hollow structure and is slidably mounted in the base, and when the base is blocked, the upper end of the sealing element moves into the first pipe fitting to seal the joint of the second pipe fitting and the first pipe fitting. After the pipeline is blocked, the sealing piece floats upwards under the action of buoyancy to seal the second pipe fitting, so that the anti-overflow effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of PVC pipe fittings, and more specifically to an anti-backflow three-way pipe. Background Art

[0002] In a multi-storey building, the drainage pipe system on each floor is connected to the drainage riser by a tee pipe. Whenever there is a heavy rain or flood that requires a lot of drainage, if the pipes are not drained smoothly or the riser pipes are blocked, it will easily cause the pipes on the lower floors to backflow, and the sewage will flow back through the riser from the toilet or floor drain, etc. In serious cases, the bathroom will be flooded, affecting the normal activities of people in the multi-storey building.

[0003] The existing pipe fittings installed at the connection between the riser and the bathroom pipe system are generally ordinary water-following tee fittings, which have no anti-overflow function. Whenever the drainage of the riser pipe is not smooth or the riser pipe is blocked, sewage is easy to overflow from the bathroom appliances of the low-level residents. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an anti-backflow tee pipe. In the case of blockage of floor pipes, the buoyancy provided by the water blocked in the pipes is used to float the seal to close the second pipe fitting, thereby preventing sewage from overflowing into the second pipe fitting and gushing out of the drainage outlet on the floor.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-backflow three-way pipe, including a three-way pipe body, the three-way pipe body includes a first pipe member arranged in a vertical direction and a second pipe member fixed on the first pipe member, the first pipe member and the second pipe member are connected. It also includes a base with a hollow interior and a sealing member, the bottom end of the first pipe member is connected to the upper end of the base, the sealing member is a hollow structure, the sealing member can be slidably installed in the base, and when the base is blocked, the upper end of the sealing member moves into the first pipe member to close the connection between the second pipe member and the first pipe member.

[0006] In this technical solution, the sewage outlets of each floor are connected to the main sewage pipe of the building through a tee pipe, wherein each drainage outlet of the floor is connected to the second pipe fitting, the first pipe fitting is installed in the main drainage pipe, and the base is buried in the building. When draining, the sewage from each sewage outlet is discharged into the first pipe fitting through the second pipe fitting, and then enters the main drainage pipe for discharge. When the main drainage pipe is blocked, water is accumulated in the main drainage pipe. When the water accumulates in the base, the seal arranged in the base floats on the surface of the water body, and the seal rises as the water level of the blocked water body rises until the connection position between the second pipe fitting and the first pipe fitting is finally closed, thereby preventing the blocked water body from overflowing to the second pipe fitting and overflowing from the sewage outlet of the floor.

[0007] Preferably, the outer wall surface of the lower end of the seal protrudes to form a limiting portion, the inner wall surface of the upper end of the base is provided with a limiting member for abutting against the limiting portion, and a receiving structure for receiving the limiting portion is provided in the base.

[0008] Preferably, the limiting member is a lower sealing ring, which is sleeved on the pipe opening at the upper end of the base, and the inner diameter of the lower sealing ring is smaller than the outer diameter of the limiting portion and larger than the outer diameter of the sealing member.

[0009] Preferably, an upper sealing ring for abutting against the upper end of the sealing member is provided inside the first pipe member and above the connection between the second pipe member and the first pipe member.

[0010] Preferably, the density of the sealing member is less than the density of water, and the length of the sealing member is longer than the height from the bottom of the first pipe member to the top of the connection between the first pipe member and the second pipe member.

[0011] Preferably, a conical surface inclined from an outer wall surface of the sealing member toward an outer wall surface of the limiting portion is provided at a position where the sealing member is connected to the limiting portion.

[0012] Preferably, a stop groove is provided on the limiting portion, a stop rib is provided on the inner wall surface of the base, and the stop rib is slidably connected to the stop groove; a water discharge outlet is also provided at the bottom of the stop groove.

[0013] Preferably, the inner wall surface of the first pipe is also provided with vertical ribs for sliding connection with the outer peripheral surface of the sealing member.

[0014] Preferably, spiral blades are also provided on the inner wall surface of the sealing member.

[0015] Preferably, a detection member is also installed on the sealing member, and a detector for detecting the detection member is fixed on the outer wall of the three-way pipe body.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the seal is floated by the blocked water body, so as to achieve the closure of the second pipe, the seal responds accurately and quickly, and there is no situation where the second pipe cannot be sealed due to response failure. When the drainage is normal, the seal does not have the possibility of upward movement, and will not affect the normal drainage. An upper sealing ring and a lower sealing ring are provided, which enhance the sealing effect while preventing the seal from excessively floating so that the second pipe cannot be closed. A conical surface is provided at the lower end of the seal, which increases the contact area with the lower sealing ring without affecting the upper end of the seal passing through the lower sealing ring, thereby enhancing the sealing effect. A stop groove, a stop rib and a vertical rib are provided to prevent the seal from deflecting, thereby preventing the seal from deflecting. A drainage port is provided on the seal to avoid water accumulation between the seal and the base. A spiral blade is added to the seal to increase the water passing capacity. A detection member and a detector are provided to facilitate timely detection of drainage pipe blockage and determination of the blockage position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the anti-overflow three-way pipe of the utility model;

[0018] Figure 2 It is an exploded view of the anti-backflow three-way pipe of the utility model;

[0019] Figure 3 It is a half-section diagram of the utility model anti-backflow three-way pipe.

[0020] In the attached drawings: 1. three-way pipe body; 2. base; 3. sealing member; 4. detection member; 5. upper sealing member; 6. lower sealing member; 7. detector; 11. first pipe fitting; 12. second pipe fitting; 13. vertical ribs; 21. supporting structure; 22. anti-rotation ribs; 31. limiting part; 32. anti-rotation groove; 33. water discharge outlet. DETAILED DESCRIPTION

[0021] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[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 the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limitations on 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] like Figure 2 As shown, a backflow prevention tee pipe comprises a tee pipe body 1, the tee pipe body 1 comprises a first pipe 11 arranged in a vertical direction and a second pipe 12 fixed on the first pipe 11, the first pipe 11 and the second pipe 12 are connected, and the tee pipe body 1 comprises a base 2 with a hollow interior and a seal 3, the bottom end of the first pipe 11 is connected to the upper end of the base 2, the seal 3 is a hollow structure, the seal 3 can be slidably installed in the base 2, when the base 2 is blocked, the upper end of the seal 3 moves into the first pipe 11 to seal the connection between the second pipe 12 and the first pipe 11. The sewage outlets of each floor are connected to the main sewage pipe of the building through the tee pipe body 1, wherein each drainage outlet of the floor is connected to the second pipe 12, the first pipe 11 is installed in the main drainage pipe, the base 2 is buried in the building, when drainage, the sewage of each drainage outlet is discharged into the first pipe 11 through the second pipe 12, and enters the main drainage pipe for discharge. When the main drainage pipe is blocked, water is accumulated in the main drainage pipe. When the water accumulates in the base 2, the seal 3 arranged in the base floats on the surface of the water, and the seal 3 rises as the water level of the blocked water rises, until the connection position between the second pipe 12 and the first pipe 11 is finally sealed, so as to prevent the blocked water from overflowing into the second pipe 12 and then overflowing from the sewage outlet on the floor.

[0026] like Figure 2As shown, the outer wall surface at the lower end of the seal 3 protrudes to form a limiting portion 31, the upper inner wall surface of the base 2 is provided with a limiting member for contacting the limiting portion 31, and the base 2 is provided with a receiving structure 21 for receiving the limiting portion 31. The seal 3 can be movably installed in the base 2 and can move freely in the base 2. In the case where there is no limiting structure to limit the position of the seal 3, the seal 3 is easy to be separated from the anti-overflow three-way pipe. Therefore, it is necessary to set a limiting structure so that the seal 3 can only move in a limited space. If the seal 3 moves upward excessively, the seal 3 will produce a gap with the second pipe 12, and the purpose of closing the second pipe 12 to prevent backflow cannot be achieved. Therefore, a limiting member is provided on the upper inner wall surface of the base 2. When the seal 3 moves upward to this place, the limiting portion 31 set at the bottom of the seal 3 conflicts with the limiting member, so that the seal 3 cannot continue to move upward. When the lower end of the sealing member 3 is supported on the supporting structure 21 in the base 2, the sealing member 3 is prevented from falling off from the anti-backflow three-way pipe.

[0027] like Figure 2 As shown, the stopper is a lower sealing ring, and the lower sealing ring 6 is sleeved on the pipe mouth at the upper end of the base 2. The inner diameter of the lower sealing ring 6 is smaller than the outer diameter of the stopper 31 and larger than the outer diameter of the seal 3. The inner diameter of the lower sealing ring 6 is larger than the outer diameter of the seal 3, so that the upper part of the seal 3 will not be affected by the lower sealing ring 6 and can extend into the tee pipe body 1. When the seal 3 moves upward to the lower sealing ring 6, since the inner diameter of the lower sealing ring 6 is smaller than the outer diameter of the stopper 31, the stopper 31 of the seal 3 will conflict with the lower sealing ring 6, so that the seal 3 cannot continue to move upward. At the same time, the seal 3 is in close contact with the lower sealing ring 6 under the action of buoyancy to achieve sealing, so that water cannot pass through the gap between the seal 3 and the first pipe 11.

[0028] like Figure 3 As shown, an upper sealing ring 5 for contacting with the upper end of the sealing member 3 is arranged inside the first pipe fitting 11 and above the connection between the second pipe fitting 12 and the first pipe fitting 11. The inner diameter of the upper sealing ring 5 is smaller than the inner diameter of the sealing member 3. When the sealing member 3 moves upward to this point, the upper end of the sealing member 3 is in close contact with the bottom surface of the upper sealing ring 5 under the action of buoyancy, and the outer peripheral surface of the upper sealing ring 5 is fixed to the inner wall surface of the first pipe fitting 11, thereby the upper end of the sealing member 3 is sealed with the first pipe fitting 11, and at the same time, the lower end of the sealing member 3 is sealed by the lower sealing ring 6, isolating the second pipe fitting 12 from the first pipe fitting 11, and the blocked water in the first pipe fitting 11 cannot overflow into the second pipe fitting 12, thereby achieving an anti-overflow effect.

[0029] like Figure 2As shown, the density of the seal 3 is less than the density of water, and the length of the seal 3 is longer than the height from the bottom of the first pipe 11 to the top of the connection between the first pipe 11 and the second pipe 12. Since the density of the seal 3 is less than the force of water, when the seal 3 is not affected by other forces in the vertical direction, the seal 3 will always float on the water surface and rise with the increase of the water level. When a blockage occurs in the anti-backflow three-way pipe, the water level in the pipe continues to rise as the drainage above the pipe increases. When the water level rises to the seal 3, the seal 3 will float on the water surface. The seal 3 is driven by buoyancy to open and close the second pipe 12, and there is no need to install an extra drive mechanism from the outside, which saves manufacturing costs and use costs. The sealing function of the seal 3 responds through its own physical properties, and has the advantages of rapid response, reliability and simple structure. The length of the seal 3 is longer than the height from the bottom of the first pipe fitting 11 to the top of the connection between the first pipe fitting 11 and the second pipe fitting 12, ensuring that the seal 3 can completely close the connection between the first pipe fitting 11 and the second pipe fitting 12 after being moved to a preset position by buoyancy, ensuring that there is no gap between the seal 3 and the second pipe fitting 12 for water to overflow.

[0030] like Figure 3 As shown, the position where the seal 3 is connected to the limiting portion 31 is provided with a conical surface inclined from the outer wall surface of the seal 3 to the outer wall surface of the limiting portion 31. The lower sealing ring 6 is elastic. When the seal 3 moves upward under the action of buoyancy and the conical surface moves to the lower sealing ring 6, at this time, the outer diameter of the seal 3 at the position of the lower sealing ring 6 increases as the seal 3 moves upward. Since the lower sealing ring 6 is elastic, the conical surface causes the lower sealing ring 6 to deform while also making the inner wall surface of the lower sealing ring 6 fit the conical surface. All parts of the conical surface with an outer diameter greater than the inner diameter of the lower sealing ring 6 can be in close contact with the lower sealing ring 6 to form a seal. Therefore, in addition to the close contact between the limiting portion 31 of the seal 3 and the bottom surface of the lower sealing ring, the conical surface of the seal 3 will be in close contact with the inner wall surface of the lower sealing ring 6. Such a setting increases the contact area between the lower sealing ring 6 and the seal 3 without affecting the seal 3 moving upward into the first pipe 11, so that it has a better sealing effect.

[0031] Example 2

[0032] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2As shown, a stop groove 32 is also provided on the limiting portion 31, and a stop rib 22 is provided on the inner wall surface of the base 2, and the stop rib 22 is slidably connected to the stop groove 32; a water discharge port 33 is also provided at the bottom of the stop groove 32. When the seal 3 is impacted by water, it may rotate due to uneven force. If the seal 3 rotates, the water may be brought into the second pipe 12 through the rotation, reducing the sealing effect. At the same time, the rotation of the seal 3 will also increase the friction loss between the seal 3 and the upper sealing ring 5 and the lower sealing ring 6, reducing the service life of the sealing structure. Therefore, it is necessary to limit the rotation of the seal 3. A stop groove 32 is also provided on the limiting portion 31, and a stop rib 22 is provided on the inner wall surface of the base 2, and the stop rib 22 is slidably connected to the stop groove 32. When the seal 3 moves in the vertical direction, the stop groove 32 and the stop rib 22 will not affect this movement. When the seal 3 rotates axially, the anti-rotation groove 32 and the anti-rotation rib 22 will conflict with each other, thereby limiting the rotation of the seal 3. At the same time, due to the gap between the seal 3 and the inner wall surface of the base 2, when in a normal drainage state, the seal 3 is placed on the supporting structure 21 in the base 2, and the upper end of the seal 2 is in an open state. When the water body is discharged to the seal 3, part of the water body will enter the space between the seal 3 and the base 2 through the open part of the upper end of the seal 3. Long-term accumulation and inability to discharge will cause the accumulated water to stink and breed mosquitoes and bacteria. When the seal 3 is working, the accumulated water body will also move up with the seal 3 and overflow into the second pipe 12. Therefore, it is necessary to set a discharge structure to discharge the accumulated water body in time. A water discharge port 33 is also provided at the bottom of the anti-rotation groove 32 for discharging the accumulated water between the seal 3 and the base 2.

[0033] like Figure 2 As shown, the inner wall surface of the first pipe 11 is also provided with vertical ribs 13 for sliding connection with the outer peripheral surface of the seal 3. When the seal 3 floats, the seal 3 may tilt due to the uneven distribution of buoyancy, which affects the floating of the seal 3 and the contact effect between the seal 3 and the upper sealing ring 5 and the lower sealing ring 6, thereby affecting the sealing effect. Therefore, the inner wall surface of the first pipe 11 is also provided with vertical ribs 13 for sliding connection with the outer peripheral surface of the seal 3. When the seal 3 tilts, the outer peripheral surface of the seal 3 conflicts with the vertical ribs 13 to limit its tilting.

[0034] like Figure 3 As shown, a spiral blade 34 is also provided on the inner wall surface of the seal 3. Since the seal 3 is installed in the base 2, the seal 3 has a certain volume, so the existence of the seal 3 will limit the passage of water to a certain extent. By providing the spiral blade 34 on the inner wall surface of the seal 3, the passing capacity of the water body is increased, and the influence of the seal 3 on normal drainage is reduced.

[0035] Example 3

[0036] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2 As shown, a detection member 4 is also installed on the seal 3, and a detector 7 for detecting the detection member 4 is fixed on the outer wall of the tee pipe body 1. When the pipeline is blocked, the blocked water accumulates in the pipeline, and the seal 3 rises with the increase of the water level, and the detection member 4 installed on the seal 3 also rises accordingly, close to the detector 7 installed on the outer wall of the tee pipe body 1. When the detection member 4 enters the detection range of the detector 7, the detector 7 detects the detection member 4 and sends an alarm, thereby achieving a self-alarm effect. This arrangement is conducive to timely detection of pipeline congestion and convenient for determining the location of the congestion.

[0037] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A backflow prevention tee pipe, comprising a tee pipe body (1), wherein the tee pipe body (1) comprises a first pipe member (11) arranged in a vertical direction and a second pipe member (12) fixed to the first pipe member (11), wherein the first pipe member (11) and the second pipe member (12) are connected to each other, and characterized in that: It also comprises a base (2) with a hollow interior and a sealing member (3); the bottom end of the first pipe member (11) is connected to the upper end of the base (2); the sealing member (3) is a hollow structure; the sealing member (3) can be slidably installed in the base (2); when the base (2) is blocked, the upper end of the sealing member (3) moves into the first pipe member (11) to seal the connection between the second pipe member (12) and the first pipe member (11).

2. The anti-backflow tee pipe according to claim 1, characterized in that: The outer wall surface of the lower end of the sealing member (3) protrudes to form a limiting portion (31), the inner wall surface of the upper end of the base (2) is provided with a limiting member for abutting against the limiting portion (31), and a receiving structure (21) for receiving the limiting portion (31) is provided inside the base (2).

3. The anti-backflow tee pipe according to claim 2, characterized in that: The limiting member is a lower sealing ring (6) which is sleeved on the pipe opening at the upper end of the base (2). The inner diameter of the lower sealing ring (6) is smaller than the outer diameter of the limiting portion (31) and larger than the outer diameter of the sealing member (3).

4. The anti-backflow tee pipe according to claim 3, characterized in that: An upper sealing ring (5) for abutting against the upper end of the sealing member (3) is arranged inside the first pipe member (11) and above the connection between the second pipe member (12) and the first pipe member (11).

5. The anti-backflow tee pipe according to claim 1, characterized in that: The density of the sealing member (3) is less than the density of water, and the length of the sealing member (3) is longer than the height from the bottom of the first pipe member (11) to the top of the connection between the first pipe member (11) and the second pipe member (12).

6. The anti-backflow tee pipe according to claim 2, characterized in that: A conical surface is provided at the position where the sealing member (3) is connected to the limiting portion (31), the conical surface being inclined from the outer wall surface of the sealing member (3) towards the outer wall surface of the limiting portion (31).

7. The anti-backflow tee pipe according to claim 2, characterized in that: The limiting portion (31) is also provided with a rotation-stopping groove (32), and the inner wall surface of the base (2) is provided with a rotation-stopping rib (22), and the rotation-stopping rib (22) is slidably connected to the rotation-stopping groove (32); and a water discharge outlet (33) is also provided at the bottom of the rotation-stopping groove (32).

8. The anti-backflow tee pipe according to claim 1, characterized in that: The inner wall surface of the first pipe member (11) is also provided with vertical ribs (13) for sliding connection with the outer peripheral surface of the sealing member (3).

9. The anti-backflow tee pipe according to claim 1, characterized in that: The inner wall surface of the sealing element (3) is also provided with spiral blades (34).

10. The anti-backflow tee pipe according to any one of claims 1 to 9, characterized in that: A detection component (4) is also installed on the sealing component (3), and a detector (7) for detecting the detection component (4) is fixed on the outer wall of the three-way pipe body (1).

Images