Anti-backflow structure of building drainage pipeline

Abstract

The utility model belongs to building drainage technical field especially is involved in a kind of backflow prevention structure of building drainage pipeline, including drain pipe, including two discharge pipes, and the backflow prevention pipe between two discharge pipes;Backflow prevention component, including the water guide ring and water release plate respectively fixed in the inner wall of the upper and lower ends of the backflow prevention pipe, the outer edge position of the water release plate is installed with top plate by elastic supporting piece above, the bearing of the center of the water release plate is installed with plugging component;Transmission assembly, including the vertical shaft fixed in the bottom end circle center of the top plate, the outer wall of the middle part of vertical shaft is fixed with extrusion column symmetrically, the top plate is linked with plugging component by transmission assembly.The utility model utilizes double sealing structure, can adapt and resist the backflow of larger water flow and water pressure, can effectively guarantee the high efficiency and stability of backflow prevention.

Description

Technical Field

[0001] This utility model belongs to the field of building drainage technology, and in particular relates to an anti-backflow structure for building drainage pipes. Background Technology

[0002] Building drainage pipes are a core component of a building's internal water supply and drainage system. They play a crucial role in collecting and transporting various types of wastewater and sewage within the building, ensuring a clean, hygienic, and properly functioning building environment. In reality, backflow of sewage into drainage pipes on lower floors frequently occurs. To prevent such incidents, anti-backflow structures are currently installed on drainage pipes during construction.

[0003] Research and investigation have revealed that existing backflow prevention structures for drainage pipes on the market are relatively simple, mostly relying solely on one-way opening flaps to prevent backflow. These structures exhibit low reliability over long-term use and are easily damaged and rendered ineffective under high water flow and pressure. Therefore, there is an urgent need to improve existing backflow prevention structures for building drainage pipes and to provide a new type of backflow prevention design. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a backflow prevention structure for building drainage pipes that is reasonably designed, simple in structure, has good backflow prevention effect, high structural reliability, and stable operation, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A backflow prevention structure for building drainage pipes, comprising:

[0007] The drain pipe includes two discharge pipes and a backflow prevention pipe located between the two discharge pipes;

[0008] The anti-backflow assembly includes a water guide ring and a water discharge plate respectively fixed to the inner walls of the upper and lower ends of the anti-backflow pipe. A top plate is installed above the outer edge of the water discharge plate by an elastic support member, and a sealing assembly is installed at the center of the water discharge plate by a bearing.

[0009] The transmission assembly includes a vertical shaft fixed at the center of the bottom end of the top plate, and extrusion columns are symmetrically fixed on the outer wall of the middle part of the vertical shaft. The top plate and the sealing assembly are linked through the transmission assembly.

[0010] In a preferred embodiment, the anti-backflow pipe is sealed and fixedly connected to both discharge pipes via sealing flanges.

[0011] In a preferred embodiment, the sealing assembly includes a hollow tube, a guide groove, and a flow-blocking plate. The hollow tube is mounted on the center of the water discharge plate and is movably sleeved on the outside of the vertical shaft. The outer wall of the hollow tube has two guide grooves symmetrically opened at the center point. Several flow-blocking plates are fixedly connected at equal angles on the bottom outer wall of the hollow tube. The upper surface of the flow-blocking plate slides and seals with the bottom end face of the water discharge plate.

[0012] In a preferred embodiment, the outer edge of the water discharge plate is provided with multiple water channels in a ring around its center. The multiple water channels are arranged in a one-to-one correspondence with several intercepting plates, and the area of ​​the intercepting plates is larger than the area of ​​the water channels.

[0013] In a preferred embodiment, the end of the extrusion column away from the vertical axis is guided and slidably located in the guide groove, the guide groove being spirally inclined, and the rotation range of the hollow tube being 0-45°.

[0014] In a preferred embodiment, the elastic support includes an outer rod, an inner rod, a support spring, and a waterproof sealing ring. The outer rod is fixed above the drain plate, and the inner rod is fixed to the bottom surface of the top plate. The outer rod and the inner rod are slidably sleeved together, and a support spring is fixedly connected between them. The support spring is a stainless steel spring. A waterproof sealing ring is embedded in the inner wall of the top of the outer rod, and the waterproof sealing ring is in contact with the outer surface of the inner rod.

[0015] In a preferred embodiment, the outer diameter of the top plate and the bottom inner diameter of the water guide ring are both arranged in an increasing manner from top to bottom. A sealing gasket is adhered to the outer side of the top of the top plate, and the top plate is sealed by contact with the water guide ring through an elastic support member.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In the solution of this utility model:

[0018] In this device structure, two sets of elastic support members arranged symmetrically can provide strong support for the top plate. The outer wall of the top plate and the inner wall of the water guide ring are both compatible inclined surfaces, which can effectively increase the contact area between the two and realize the compression of the sealing gasket, resulting in a better sealing effect between the top plate and the water guide ring.

[0019] When backflow occurs, the top plate can tightly contact and seal with the water guide ring. At the same time, the top plate can drive the vertical shaft to rise. At this time, the two extrusion columns on the outer wall of the vertical shaft can respectively extrude two inclined spiral guide grooves, which can cause the hollow tube to drive the intercepting plate to rotate 45°, so that multiple intercepting plates and their corresponding multiple water passage grooves overlap. The intercepting plates are used to seal the water passage grooves. This device uses a double sealing structure, which can adapt to and resist backflow with large water flow and water pressure, and can effectively ensure the high efficiency and stability of backflow prevention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings are described as follows:

[0021] Figure 1 This is a three-dimensional front view cross-sectional structural diagram of the present invention;

[0022] Figure 2 This is a front view structural diagram of the present invention in the water-flow state;

[0023] Figure 3 This is a front view schematic diagram of the vertical axis and extrusion column of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall front view of the elastic support component of this utility model;

[0025] Figure 5 This is a top view of the overall structure of the sealing component of this utility model;

[0026] Figure 6 This is a front view structural diagram of the water discharge plate and hollow tube of this utility model.

[0027] In the picture:

[0028] 1. Discharge pipe; 2. Anti-backflow pipe; 3. Sealing flange; 4. Water guide ring; 5. Water discharge plate; 6. Water passage trough; 7. Sealing assembly; 71. Hollow pipe; 72. Guide groove; 73. Cut-off plate; 8. Elastic support; 81. Outer rod; 82. Inner rod; 83. Support spring; 84. Waterproof sealing ring; 9. Top plate; 10. Sealing gasket; 11. Vertical shaft; 12. Extrusion column. Detailed Implementation

[0029] The embodiments described below are merely some embodiments of the present invention and do not represent all embodiments consistent with the present invention. Exemplary embodiments will now be described with reference to the accompanying drawings:

[0030] like Figure 1-6 As shown, the backflow prevention structure for building drainage pipes of this utility model includes:

[0031] The drain pipe includes two discharge pipes 1 and a backflow prevention pipe 2 located between the two discharge pipes 1;

[0032] The anti-backflow assembly includes a water guide ring 4 and a water discharge plate 5 respectively fixed to the inner walls of the upper and lower ends of the anti-backflow pipe 2. A top plate 9 is installed above the outer edge of the water discharge plate 5 by an elastic support member 8. A sealing assembly 7 is installed on the bearing at the center of the water discharge plate 5.

[0033] The transmission assembly includes a vertical shaft 11 fixed at the center of the bottom of the top plate 9. The outer wall of the middle part of the vertical shaft 11 is symmetrically fixed with extrusion columns 12. The top plate 9 and the sealing assembly 7 are linked through the transmission assembly.

[0034] Based on the above structure, the anti-backflow pipe 2 is sealed and fixedly connected to the two discharge pipes 1 by sealing flanges 3.

[0035] In this embodiment, the sealing flange 3 facilitates a stable and sealed connection between the discharge pipe 1 and the anti-backflow pipe 2.

[0036] Based on the above structure, the sealing component 7 includes a hollow tube 71, a guide groove 72, and a flow interceptor 73. The hollow tube 71 is mounted on the center of the water discharge plate 5 and is movably sleeved on the outside of the vertical shaft 11. The outer wall of the hollow tube 71 has two guide grooves 72 symmetrically opened at the center point. Several flow interceptors 73 are fixedly connected at equal angles on the bottom outer wall of the hollow tube 71. The upper surface of the flow interceptor 73 slides and seals with the bottom end face of the water discharge plate 5.

[0037] Based on the above structure, multiple water channels 6 are arranged in a ring around the center of the outer edge of the water discharge plate 5. The multiple water channels 6 are arranged in a one-to-one correspondence with several intercepting plates 73. The area of ​​the intercepting plates 73 is larger than the area of ​​the water channels 6.

[0038] In this embodiment, by controlling the rotation of the hollow tube 71, multiple intercepting plates 73 and their corresponding multiple water passages 6 are made to overlap, so that the intercepting plates 73 can be used to block and seal the water passages 6, thereby preventing backflow.

[0039] Based on the above structure, the end of the extrusion column 12 away from the vertical axis 11 is guided and slidably located in the guide groove 72, which is spirally inclined, and the rotation range of the hollow tube 71 is 0-45°.

[0040] In this embodiment, when the top plate 9, the vertical shaft 11 and the extrusion column 12 are raised or lowered, the extrusion column 12 can extrude the guide groove 72, thereby driving the hollow tube 71 to rotate multiple intercepting plates 73, which facilitates the synchronous opening and closing of the water channel 6 and the water guide ring 4, making it convenient for water discharge and preventing backflow.

[0041] Based on the above structure, the elastic support 8 includes an outer rod 81, an inner rod 82, a support spring 83, and a waterproof sealing ring 84. The outer rod 81 is fixed above the water discharge plate 5, and the inner rod 82 is fixed to the bottom end face of the top plate 9. The outer rod 81 and the inner rod 82 are slidably sleeved together, and the support spring 83 is fixedly connected between them. The support spring 83 is a stainless steel spring. The waterproof sealing ring 84 is embedded in the inner wall of the top of the outer rod 81, and the waterproof sealing ring 84 is in contact with the outer surface of the inner rod 82.

[0042] In this embodiment, the elastic support 8 is used to make it easy to lift the top plate 9 upwards to contact and seal with the water guide ring 4, thereby achieving the purpose of preventing backflow.

[0043] Based on the above structure, the outer diameter of the top plate 9 and the bottom inner diameter of the water guide ring 4 are both set to increase from top to bottom. A sealing gasket 10 is bonded to the outer side of the top of the top plate 9, and the top plate 9 is sealed by contact with the water guide ring 4 through the elastic support member 8.

[0044] In this embodiment, the outer wall of the top plate 9 and the inner wall of the water guide ring 4 are both compatible inclined surfaces, which can effectively increase the contact area between the two and realize the compression of the sealing gasket 10, thereby further enhancing the sealing effect.

[0045] The working principle of this utility model is as follows:

[0046] In use, the anti-backflow pipe 2 is first fixedly and sealed on the discharge pipe 1 through the sealing flange 3. When the sewage flows normally from top to bottom, the top plate 9 can move down and the elastic support 8 can contract under the impact of water flow and gravity. At the same time, the top plate 9 can drive the vertical shaft 11 to move down synchronously. At this time, the squeezing column 12 on the outer wall of the vertical shaft 11 can squeeze the inclined spiral guide groove 72, so that the hollow pipe 71 drives the intercepting plate 73 to rotate counterclockwise by 45°, thereby allowing the water guide ring 4 and the water passage groove 6 to be in an open and unobstructed state at the same time, which facilitates the normal discharge of sewage.

[0047] When sewage backflow occurs, the top plate 9 loses its impact and is also subjected to the upward thrust of the backflow sewage and the elastic force of the support spring 83. At this time, the top plate 9 rises and resets and comes into close contact with the water guide ring 4. The outer wall of the top plate 9 and the inner wall of the water guide ring 4 are both compatible inclined surfaces, which can effectively increase the contact area between the two and achieve effective compression of the sealing gasket 10. The sealing effect between the top plate 9 and the water guide ring 4 is better.

[0048] As the sewage backflow causes the top plate 9 to rise, the vertical shaft 11 and the squeezing column 12 can return to their original positions along with the top plate 9. At this time, the squeezing column 12 can squeeze the guide groove 72, causing the hollow tube 71 and the intercepting plate 73 to rotate 45° clockwise and return to their original positions. This allows multiple intercepting plates 73 and their corresponding multiple water passages 6 to overlap, and the intercepting plates 73 are used to seal the water passages 6. This device utilizes a double sealing structure, and the intercepting plate 73 is a rotary opening and closing mechanism, which can adapt to and resist backflow of large water flow and water pressure. It can effectively ensure the high efficiency and stability of backflow prevention. Moreover, this structure is simple, low in cost, and has good performance, and has good prospects for market promotion and widespread application.

[0049] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any equivalent changes, modifications, substitutions, and variations made by those skilled in the art based on the concept of this utility model and on the basis of existing technology through logical analysis, reasoning, or limited experiments shall be within the scope of protection defined by the claims.

Claims

1. A backflow preventing structure of a building drain pipe, characterized by comprising: include: The drain pipe includes two discharge pipes (1) and a backflow prevention pipe (2) located between the two discharge pipes (1); The anti-backflow assembly includes a water guide ring (4) and a water discharge plate (5) respectively fixed to the inner walls of the upper and lower ends of the anti-backflow pipe (2). A top plate (9) is installed above the outer edge of the water discharge plate (5) by an elastic support member (8). A sealing assembly (7) is installed at the center of the water discharge plate (5). The transmission assembly includes a vertical shaft (11) fixed at the center of the bottom of the top plate (9). The outer wall of the middle part of the vertical shaft (11) is symmetrically fixed with extrusion columns (12). The top plate (9) and the sealing assembly (7) are linked through the transmission assembly.

2. The backflow prevention structure of a building drain according to claim 1, wherein: The anti-backflow pipe (2) is sealed and fixedly connected to the two discharge pipes (1) by sealing flanges (3).

3. The backflow prevention structure of a building drain according to claim 1, wherein: The sealing assembly (7) includes a hollow tube (71), a guide groove (72), and a flow cut-off plate (73). The hollow tube (71) is mounted on the center of the water discharge plate (5) and is movably sleeved on the outside of the vertical shaft (11). The outer wall of the hollow tube (71) is symmetrically provided with two guide grooves (72) at the center point. Several flow cut-off plates (73) are fixedly connected at equal angles on the bottom outer wall of the hollow tube (71). The upper surface of the flow cut-off plate (73) slides and seals with the bottom surface of the water discharge plate (5).

4. The backflow prevention structure of a building drain according to claim 3, wherein: The outer edge of the water discharge plate (5) is provided with multiple water channels (6) arranged in a ring around its center. The multiple water channels (6) are arranged in a one-to-one correspondence with several intercepting plates (73). The area of ​​the intercepting plates (73) is larger than the area of ​​the water channels (6).

5. A backflow prevention structure for a building drain according to claim 4, wherein: The end of the extrusion column (12) away from the vertical axis (11) is guided and slidably located in the guide groove (72), which is spirally inclined, and the rotation range of the hollow tube (71) is 0-45°.

6. The backflow prevention structure of a building drain according to claim 1, wherein: The elastic support (8) includes an outer rod (81), an inner rod (82), a support spring (83), and a waterproof sealing ring (84). The outer rod (81) is fixed above the water discharge plate (5), and the inner rod (82) is fixed to the bottom end face of the top plate (9). The outer rod (81) and the inner rod (82) are slidably connected and the support spring (83) is fixedly connected between them. The support spring (83) is a stainless steel spring. The waterproof sealing ring (84) is embedded in the inner wall of the top end of the outer rod (81), and the waterproof sealing ring (84) is in contact with the outer surface of the inner rod (82).

7. The backflow prevention structure of a building drain according to claim 1, wherein: The outer diameter of the top plate (9) and the bottom inner diameter of the water guide ring (4) are both set to increase from top to bottom. A sealing gasket (10) is bonded to the outer side of the top of the top plate (9). The top plate (9) is sealed to the water guide ring (4) by the elastic support member (8).

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