Odor-resistant negative pressure resistant drainage pipe structure

Abstract

The application provides a deodorization and negative pressure resistance drainage pipe structure, and belongs to the technical field of pipes. The application solves the problem of how to ensure the deodorization and insect resistance of the drainage pipe. The deodorization and negative pressure resistance drainage pipe structure comprises a pipe body and a long strip-shaped pressure stabilizing pipe. The pipe body comprises a vertically arranged water inlet section, a horizontally arranged water outlet section and a curved water storage section between the water inlet section and the water outlet section. The upper end of the pressure stabilizing pipe is fixed in the water inlet section, and the lower end of the pressure stabilizing pipe extends into the water storage section. The upper end of the pressure stabilizing pipe is provided with a pressure stabilizing cap. The pressure stabilizing cap is arched upward, so that the lower side of the pressure stabilizing cap forms a groove. The upper end of the pressure stabilizing pipe extends into the groove. The outer wall of the upper end of the pressure stabilizing pipe extending into the groove is provided with a gas passing hole in the circumferential direction. The outer edge of the pressure stabilizing cap is lower than the lower edge of the gas passing hole or is flush with the lower edge of the gas passing hole. The outer edge of the pressure stabilizing cap and the inner wall of the water inlet section form a water passing gap. The deodorization and negative pressure resistance drainage pipe structure has higher deodorization and insect resistance.

Description

Technical Field

[0001] This invention belongs to the field of pipeline technology and relates to an odor-proof and negative pressure-resistant drainage pipe structure. Background Technology

[0002] In the water supply and drainage systems of civil buildings, odor-proof and insect-proof structures are required for domestic drainage points such as washbasins, kitchen sinks, and shower room floor drains. Currently, the most common solution in the industry is to use drainage pipe fittings with water traps. The water trapped in the water trap forms a continuous water seal layer, blocking the air circulation channel between the inside of the drainage pipe and the indoor space. This effectively prevents foul odors from the sewer from flowing back into the room, while also preventing harmful organisms such as cockroaches and woodlice from entering the room through the drainage pipes, ensuring indoor environmental hygiene and living comfort.

[0003] However, in actual use, especially in high-rise buildings such as residential buildings, apartments, and office buildings, this traditional water seal structure has serious potential for failure. Because all floors in a high-rise building share a single vertical drainage pipe, when upper-floor residents drain water, a large amount of sewage falls rapidly down the drainage pipe under gravity, creating a localized negative pressure zone inside the pipe and generating a strong siphon effect. This siphon effect is transmitted through drainage branch pipes to the water traps of lower-floor residents, forcibly drawing the water in the water traps into the main drainage pipe. If this happens repeatedly within a short period, the water in the water traps will be drawn into the main drainage pipe, causing the water seal to completely fail and thus rendering it ineffective in preventing odors and insects. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an odor-proof and negative pressure-resistant drainage pipe structure. The technical problem to be solved by this invention is: how to ensure the odor-proof and insect-proof functions of drainage pipe fittings.

[0005] The objective of this invention can be achieved through the following technical solution: an odor-proof and negative pressure-resistant drainage pipe structure, comprising a pipe body, the pipe body comprising a vertically arranged inlet section, a horizontally arranged outlet section, and a curved water storage section located between the inlet section and the outlet section. This odor-proof and negative pressure-resistant drainage pipe structure also includes a long strip-shaped pressure stabilizing pipe, the upper end of which is fixed inside the inlet section, and the lower end of which extends into the water storage section. The upper end of the pressure stabilizing pipe has a pressure stabilizing cap, which arches upward to form a groove on its lower side. The upper end of the pressure stabilizing pipe extends into the groove. An air passage is formed circumferentially on the outer wall of the upper end of the pressure stabilizing pipe extending into the groove. The outer edge of the pressure stabilizing cap is lower than or flush with the lower edge of the air passage wall, and a water passage gap is formed between the outer edge of the pressure stabilizing cap and the inner wall of the inlet section.

[0006] Compared to existing technologies, this application differs in that: a pressure-stabilizing pipe is installed within the inlet section of the pipe body, with its lower end connected to the water storage section and its upper end connected to the inlet section via an air vent. Wastewater is discharged from the inlet section to the water storage section through a water-passing gap formed by the cooperation between the pressure-stabilizing cap and the water storage section. After installation and initial drainage, a certain depth of water remains in the water storage section to form a water seal. At this time, some water enters the pressure-stabilizing pipe from bottom to top through its lower end, causing the water level inside the pipe to gradually rise. When the water level rises to cover the lower edge of the air vent, the upper end of the pressure-stabilizing pipe extends into the groove formed under the pressure-stabilizing cap. Furthermore, the water seal in the water storage section is flush with the outer edge of the pressure-stabilizing cap, thus trapping the air at the upper end of the pressure-stabilizing pipe within the groove space below the cap, preventing it from escaping through the air vent. As the water level continues to rise, the trapped air is gradually compressed, forming an elastic compressed air chamber at the upper end of the pressure-stabilizing pipe. When upper-level drainage causes negative pressure in the main drainage pipe, this negative pressure is transmitted through the outlet section to the storage section, creating a suction force on the water in the storage section towards the main drainage pipe. In principle, this force should draw the water out of the storage section, causing the water seal to fail. However, due to the presence of the pressure stabilizing pipe, the compressed air inside, under positive pressure, expands downwards, forcing water from the pressure stabilizing pipe into the storage section before it is drawn into the main drainage pipe, generating a downward thrust. This thrust is equal in magnitude and opposite in direction to the upward suction force generated by the siphon, canceling each other out and preventing water from being drawn from the storage section towards the outlet section. Throughout this process, the water level in the storage section only fluctuates slightly, and the water seal depth remains essentially constant. When the siphon effect disappears, the pressure in the main drainage pipe returns to atmospheric pressure. At this point, the excess water in the storage section flows back into the pressure stabilizing pipe under gravity, recompressing the air above it and restoring the compressed air chamber to its initial pressure state. The entire process involves no moving parts; the pressure balance between the pipe body and the pressure stabilizing pipe ensures a stable water seal in the water storage section, thereby guaranteeing that the drainage pipe fittings can achieve the functions of odor prevention and insect prevention.

[0007] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the center of the pressure-stabilizing cap arches upwards, making it conical. The vent holes are numerous and all are strip-shaped, spaced apart circumferentially along the pressure-stabilizing pipe. This shape guides wastewater to flow outwards along the conical surface, preventing direct impact on the vent holes. The strip-shaped vent holes also minimize the risk of clogging.

[0008] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the center of the pressure-stabilizing cap coincides with the centerline of the inlet section. The centrally positioned pressure-stabilizing cap ensures a uniform water passage gap between itself and the inner wall of the inlet section, allowing for even distribution of wastewater within the inlet section and preventing localized excessively fast or slow flow velocities. Simultaneously, the central positioning ensures a consistent water level rise rate around the pressure-stabilizing pipe, resulting in uniform pressure distribution within the compressed air chamber and further enhancing the stability and reliability of the air spring effect.

[0009] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, a water passage hole is provided at the lower end of the pressure-stabilizing pipe, and the lower end of the pressure-stabilizing pipe is connected to the water storage section through the water passage hole. The water passage hole ensures that the lower end of the pressure-stabilizing pipe is connected to the water storage section, while simultaneously preventing the lower end of the pressure-stabilizing pipe from being too open, thus preventing solid debris in the sewage from entering the pressure-stabilizing pipe.

[0010] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, there are multiple water passage holes, which are spaced apart circumferentially along the pressure-stabilizing pipe. The multiple circumferentially spaced water passage holes ensure that even if some water passage holes are blocked by debris, the remaining water passage holes can still achieve normal bidirectional water flow. Simultaneously, the multiple water passage holes enable more uniform and smooth water flow between the pressure-stabilizing pipe and the water storage section, avoiding localized water flow obstruction and further improving the response speed and stability of the air spring effect.

[0011] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the lower end of the pressure-stabilizing pipe protrudes downwards in an arc shape. This arc-shaped lower end reduces the impact of water flow on the bottom of the pressure-stabilizing pipe, while also preventing debris from accumulating at the bottom and clogging the water passage. The arc-shaped structure also guides the water flow smoothly from the storage section to the outlet section, eliminating dead zones and reducing debris deposition.

[0012] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, several protrusions are located at the junction of the inlet section and the storage section within the pipe body. These protrusions are spaced apart circumferentially along the pipe body. Each protrusion has a slot on its upper side. Several locking blocks are located on the outer wall of the upper end of the pressure-stabilizing pipe, also spaced apart circumferentially along the pipe body. Each locking block engages with its corresponding slot, positioning the pressure-stabilizing pipe within the pipe body. This snap-fit ​​installation structure allows for quick installation of the pressure-stabilizing pipe without any tools, resulting in high installation efficiency and low production costs. The combination of multiple circumferentially spaced protrusions and locking blocks provides dual circumferential and axial positioning of the pressure-stabilizing pipe, preventing rotation or vertical movement within the pipe body and ensuring accurate positioning of the air and water passages, thereby guaranteeing the proper functioning of the air spring effect.

[0013] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the upper outer wall of the pressure-stabilizing pipe has a radially convex-shaped connecting plate. Several connecting plates are arranged circumferentially around the pressure-stabilizing pipe with their smaller ends facing outwards. Each connecting plate has a locking block at its smaller end, and each convex block also has a limiting groove located inside the locking groove. When the locking block engages in the locking groove, the smaller end of the connecting plate engages in the limiting groove. The cooperation between the convex-shaped connecting plate and the limiting groove further enhances the robustness of the locking structure. When the locking block engages in the locking groove, the smaller end of the connecting plate simultaneously engages in the limiting groove, forming a double locking structure. This effectively prevents the pressure-stabilizing pipe from loosening or falling off under the impact of water flow and changes in air pressure, improving the overall reliability and durability of the structure.

[0014] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the outer edge of the pressure-stabilizing cap is integrally formed with each of the connecting plates and the locking blocks. This integral molding structure ensures the connection strength between the components, preventing breakage or detachment, while also simplifying the manufacturing process and reducing production costs. The integral molding also ensures the positional accuracy between the pressure-stabilizing cap and the air passage, guaranteeing that the outer edge of the pressure-stabilizing cap is accurately lower than the lower edge of the air passage, thus ensuring the smooth formation of the compressed air chamber.

[0015] In the aforementioned odor-proof and negative pressure-resistant drainage pipe structure, the inner wall of the inlet section has several spirally arranged guide channels. These guide channels are spaced apart circumferentially along the inner wall of the pipe body and extend downwards into the storage section. The spiral guide channels guide the sewage in the inlet section to form a swirling flow, causing solid debris in the sewage to rotate downwards with the water flow, preventing debris from accumulating at the bottom of the inlet section and preventing pipe blockage. Simultaneously, the swirling flow allows sewage to enter the storage section more smoothly, reducing resistance and noise during drainage. Furthermore, the swirling flow also makes the water level rise more evenly in the storage section, which is beneficial for the stable formation of the compressed air chamber.

[0016] Compared with existing technologies, this odor-proof and negative pressure-resistant drainage pipe structure has the following advantages:

[0017] A pressure stabilizing pipe is installed inside the pipe. After water is introduced, the air spring effect formed in the pressure stabilizing pipe cancels out the siphon negative pressure, preventing the siphon effect generated when water flows in the drainage riser from drawing water from the water storage section, ensuring the integrity of the water seal, and guaranteeing a long-lasting and reliable odor and insect prevention effect. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an odor-proof and negative pressure-resistant drainage pipe.

[0019] Figure 2 This is a side view of the structure of this odor-proof and negative pressure-resistant drainage pipe.

[0020] Figure 3 yes Figure 2 A sectional view taken along the AA direction.

[0021] Figure 4 This is a front view of the structure of this odor-proof and negative pressure-resistant drainage pipe.

[0022] Figure 5 yes Figure 4 A sectional view taken along the BB direction.

[0023] Figure 6 This is a schematic diagram of a Zener diode.

[0024] Figure 7 This is a schematic diagram of the Zener diode from another perspective.

[0025] Figure 8 It is a schematic diagram of the tube structure and a magnified view of a part of it.

[0026] In the picture,

[0027] 1. Pipe body; 11. Inlet section; 12. Outlet section; 13. Storage section; 14. Protrusion; 141. Slot; 142. Limiting groove; 15. Guide groove;

[0028] 2. Voltage stabilizing pipe; 21. Voltage stabilizing cap; 211. Groove; 22. Air vent; 23. Water vent; 24. Locking block; 25. Connecting plate;

[0029] 3. Water passage gap. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0031] like Figure 1 , Figure 2 , Figure 4 As shown, this odor-proof and negative pressure-resistant drainage pipe structure includes a pipe body 1 and a pressure-stabilizing pipe 2 fixed inside the pipe body 1. The pipe body 1 is a one-piece structure, specifically P-shaped, as shown... Figure 1 As shown, the pipe body 1 includes, from right to left, a vertically arranged inlet section 11, a U-shaped water storage section 13, and a horizontally arranged outlet section 12. The inlet section 11 is used to connect to the drain outlet of a washbasin, floor drain, etc.; the outlet section 12 is used to connect to the drain branch pipe.

[0032] Combination Figure 3 , Figure 5 and Figure 8Inside the pipe body 1, at the junction of the inlet section 11 and the storage section 13, two protrusions 14 are evenly spaced circumferentially. Each protrusion 14 is integrally formed with the inner wall of the pipe body 1. Each protrusion 14 has a slot 141 and a limiting groove 142 on its upper side. The limiting groove 142 on the same protrusion 14 is located inside the slot 141, and the width of the limiting groove 142 is smaller than the width of the slot 141. Several spiral guide grooves 15, preferably five, are evenly spaced circumferentially on the inner wall of the inlet section 11. The upper end of each guide groove 15 extends to the edge of the port of the inlet section 11, and the lower end extends to the upper part of the storage section 13.

[0033] Combination Figure 6 and Figure 7 The pressure stabilizing pipe 2 is a long, hollow cylindrical tube. A pressure stabilizing cap 21 is integrally formed at the upper end of the pressure stabilizing pipe 2. The center of the pressure stabilizing cap 21 arches upwards into a cone shape, forming a groove 211 on its lower side. The upper end of the pressure stabilizing pipe 2 is integrally formed with the lower side of the pressure stabilizing cap 21. Four strip-shaped air passage holes 22 are evenly spaced along the circumference of the outer wall of the upper end of the pressure stabilizing pipe 2, which extends into the groove 211. The outer edge of the pressure stabilizing cap 21 is lower than the lower edge of the wall of the air passage holes 22. The lower end of the pressure stabilizing pipe 2 protrudes downwards into a hemispherical arc surface. Four strip-shaped water passage holes 23 are evenly spaced along the circumference of the outer wall of the lower end of the pressure stabilizing pipe 2. Two U-shaped connecting plates 25 are integrally formed along the radial direction on the outer wall of the upper end of the pressure stabilizing pipe 2. The two connecting plates 25 are evenly spaced along the circumference with their smaller ends facing outwards. Each connecting plate 25 has a locking block 24 integrally formed at its small end. The size of the locking block 24 is adapted to the locking groove 141 on the protrusion 14, and the size of the small end of the connecting plate 25 is adapted to the limiting groove 142.

[0034] During assembly, the pressure stabilizing pipe 2 is inserted into the water inlet section opening of the pipe body 1, aligning the two locking blocks 24 with the locking grooves 141 on the two protrusions 14 respectively; then, the pressure stabilizing pipe 2 is pressed down, causing the locking blocks 24 to engage in the locking grooves 141, while the small end of the connecting plate 25 engages in the limiting groove 142; the pressure stabilizing pipe 2 is then firmly fixed inside the pipe body 1. At this time, the lower end of the pressure stabilizing pipe 2 extends into the water storage section 13, forming a circumferentially uniform water passage gap 3 between the outer edge of the pressure stabilizing cap 21 and the inner wall of the water inlet section 11.

[0035] In the initial drainage state, sewage flows in from the upper end of the inlet section 11, forms a swirling flow under the guidance of the spiral guide channel 15, flows downward through the water passage gap 3 between the pressure stabilizing cap 21 and the inner wall of the inlet section 11, enters the water storage section 13, and is discharged from the outlet section 12.

[0036] After drainage, a 50mm deep water body remains in the water storage section 13, forming an initial water seal. During this process, as the water level in the water storage section 13 continues to accumulate, the water in the water storage section 13 will continuously flow into the pressure stabilizing pipe through the water passage 23, causing the air in the pressure stabilizing pipe 2 to be discharged through the air passages 22 at the top. Until the water level in the water storage section 13 is level with the outer edge of the pressure stabilizing cap 21, the air can no longer be discharged. The water that subsequently enters will gradually compress the air trapped at the top of the pressure stabilizing pipe 2, maintaining a certain pressure.

[0037] When the external drainage main drain is discharging water, the negative pressure is transmitted through the outlet section 12 to the storage section 13, generating an upward suction force on the water in the storage section 13. At this time, the compressed air in the pressure stabilizing pipe 2 expands downward first, forcing the water in the pressure stabilizing pipe 2 into the storage section 13 through the water passage 23, generating a downward thrust. This thrust is equal in magnitude and opposite in direction to the upward suction force generated by the siphon, and the two cancel each other out, so that the water in the storage section 13 is not sucked upward, but only fluctuates slightly within the storage section 13.

[0038] Once the siphon effect disappears, the pressure inside the main drainage pipe returns to atmospheric pressure. At this point, the excess water in the storage section 13 flows back into the pressure stabilizing pipe 2 under gravity, recompressing the air at the top and restoring the pressure in the compressed air chamber to its initial level, preparing for the next siphon effect. Furthermore, after daily drainage is completed, water entering the pipe body 1 through the inlet section 11 is continuously introduced into the storage section 13 under the guidance of the guide channel 15, replenishing the water and ensuring the maintenance of the standard water seal height, while also maintaining the air pressure inside the pressure stabilizing pipe 2.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0040] Although this document frequently uses terms such as pipe body 1, inlet section 11, outlet section 12, water storage section 13, protrusion 14, slot 141, limiting groove 142, guide groove 15, pressure stabilizing pipe 2, pressure stabilizing cap 21, groove 211, air passage 22, water passage 23, locking block 24, connecting plate 25, and water passage gap 3, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A deodorizing and negative pressure-resistant drainage pipe structure, comprising a pipe body (1), wherein the pipe body (1) includes a vertically arranged inlet section (11), a horizontally arranged outlet section (12), and a curved water storage section (13) located between the inlet section (11) and the outlet section (12), characterized in that, The structure of this odor-proof and negative pressure-resistant drainage pipe also includes a long strip-shaped pressure-stabilizing pipe (2). The upper end of the pressure-stabilizing pipe (2) is fixed in the water inlet section (11), and the lower end extends into the water storage section (13). The upper end of the pressure-stabilizing pipe (2) has a pressure-stabilizing cap (21). The pressure-stabilizing cap (21) is arched upward to form a groove (211) on the lower side. The upper end of the pressure-stabilizing pipe (2) extends into the groove (211). An air passage hole (22) is opened circumferentially on the outer wall of the upper end of the pressure-stabilizing pipe (2) extending into the groove (211). The outer edge of the pressure-stabilizing cap (21) is lower than or flush with the lower edge of the air passage hole (22) wall. A water passage gap (3) is formed between the outer edge of the pressure-stabilizing cap (21) and the inner wall of the water inlet section (11).

2. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 1, characterized in that, The center of the voltage stabilizing cap (21) arches upward, making the voltage stabilizing cap (21) conical. The air passage (22) has several holes, all of which are strip-shaped holes, and the several air passages (22) are arranged at intervals along the circumference of the voltage stabilizing tube (2).

3. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 2, characterized in that, The center of the pressure stabilizing cap (21) coincides with the center line of the water inlet section (11).

4. The odor-proof and negative pressure-resistant drainage pipe structure according to any one of claims 1-3, characterized in that, The lower end of the pressure stabilizing pipe (2) has a water passage hole (23), and the lower end of the pressure stabilizing pipe (2) is connected to the water storage section (13) through the water passage hole (23).

5. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 4, characterized in that, The water passage (23) has a plurality of holes, and the plurality of water passage (23) are arranged at intervals along the circumference of the pressure stabilizing pipe (2).

6. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 5, characterized in that, The lower end of the voltage regulator tube (2) protrudes downward in an arc shape.

7. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 5, characterized in that, The pipe body (1) has several protrusions (14) located at the junction of the water inlet section (11) and the water storage section (13), and the several protrusions (14) are arranged at intervals along the circumference of the pipe body (1). Each of the protrusions (14) has a slot (141) on its upper side. The pressure stabilizing pipe (2) has several locking blocks (24) on its upper outer side wall, and the several locking blocks (24) are arranged at intervals along the circumference of the pressure stabilizing pipe (2). Each locking block (24) is locked in each of the slots (141) so that the pressure stabilizing pipe (2) is positioned in the pipe body (1).

8. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 7, characterized in that, The upper outer wall of the voltage regulator tube (2) has a convex-shaped connecting plate (25) along the radial direction. Several connecting plates (25) are arranged circumferentially along the voltage regulator tube (2) with their small ends facing outward. Each connecting plate (25) has a locking block (24) at its small end. Each convex block (14) also has a limiting groove (142) located inside the locking groove (141). When the locking block (24) is engaged in the locking groove (141), the small end of the connecting plate (25) is engaged in the limiting groove (142).

9. The odor-proof and negative pressure-resistant drainage pipe structure according to claim 8, characterized in that, The outer edge of the voltage stabilizing cap (21) is integrally formed with each of the connecting plates (25) and each of the locking blocks (24).

10. The odor-proof and negative pressure-resistant drainage pipe structure according to any one of claims 1-3, characterized in that, The inner wall of the water inlet section (11) has a plurality of spirally arranged guide channels (15), which are arranged circumferentially along the inner wall of the pipe body (1) and extend to the water storage section (13) at their lower ends.

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