Micro-negative pressure regulation structure and linkage regulation micro-negative pressure drainage system

Abstract

The application relates to a micro-negative pressure regulation structure and a linkage regulation micro-negative pressure drainage system, wherein the micro-negative pressure regulation structure comprises a cylindrical shell, a sealing element and a first driving mechanism; the outer wall of the cylindrical shell is in sliding sealing contact with the inner wall of a ventilation stand pipe; the sealing element is arranged in the cylindrical shell and divides the internal space of the cylindrical shell into an upper space and a lower space; the sealing element is connected with the first driving mechanism and can realize the communication and disconnection of the upper space and the lower space under the driving of the first driving mechanism. The application further provides a linkage regulation micro-negative pressure drainage system, and the micro-negative pressure regulation structure is arranged on the ventilation stand pipe. The application can avoid the loss of the water seal of the floor drain during the drainage process and improves the sanitary safety of the residential building.

Description

Technical Field

[0001] This application belongs to the field of building drainage technology, specifically relating to a micro-negative pressure control structure and a linkage control micro-negative pressure drainage system. Background Technology

[0002] With urban development, the height, number of floors, and size of residential buildings are constantly increasing. Consequently, the drainage systems serving these buildings are becoming increasingly taller and more complex, leading to significant pressure fluctuations within the system during drainage. When large negative or positive / negative pressure oscillations occur, the likelihood of water seal failure in floor drains increases. Regardless of the drainage system type, when the water seal is broken, gases within the drainage system can enter the residential interior through positive pressure created by drainage or the chimney effect. This allows pathogenic microorganisms and polluted gases from within the pipes to enter the room, greatly increasing the risk of virus transmission. In recent years, large-scale virus transmission events have frequently involved the vertical spread of viruses through residential building drainage pipes due to water seal failure.

[0003] Traditional residential building drainage system design and installation are primarily based on meeting drainage volume requirements, without taking effective preventative and containment measures for internal pipe pressure changes, especially pressure fluctuations after water seal failure. On the one hand, it cannot prevent water seal failure caused by alternating positive and negative pressure oscillations during drainage; on the other hand, after the floor drain water seal loses some height, it is impossible to effectively prevent gas from the pipes from entering the room through the floor drain due to positive drainage pressure and the chimney effect, causing the longitudinal spread of pathogenic microorganisms in the residential building's drainage pipes. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a micro-negative pressure control structure and a linkage control micro-negative pressure drainage system to solve one or more of the above-mentioned problems existing in the prior art.

[0005] The purpose of this utility model is achieved as follows:

[0006] On the one hand, a micro-negative pressure regulation structure is provided, including a cylindrical shell, a sealing element, and a first driving mechanism; the outer wall of the cylindrical shell is in sliding sealing contact with the inner wall of the ventilation riser; the sealing element is disposed inside the cylindrical shell, dividing the internal space of the cylindrical shell into an upper space and a lower space; the sealing element is connected to the first driving mechanism, and can realize the connection and disconnection of the upper space and the lower space under the drive of the first driving mechanism.

[0007] Furthermore, the sealing element includes a one-way diaphragm flap, which is disposed inside the cylindrical shell. The one-way diaphragm flap switches between a closed state and an open state through a first driving mechanism.

[0008] Furthermore, the cylindrical outer shell is made of hard silicone; the unidirectional diaphragm flap is made of flexible silicone.

[0009] Furthermore, the one-way flap has a top open end and a bottom closed end. The bottom closed end is connected to the first driving mechanism. The first driving mechanism can switch the one-way flap between the closed state and the open state by driving the bottom closed end to move linearly back and forth along the axis of the cylindrical shell.

[0010] Furthermore, the micro-negative pressure control structure also has an upper filter plate and a lower filter plate, which are respectively located at the two axial ends of the cylindrical shell. The upper filter plate has an integrally formed circular vent plate and an annular blocking sealing plate. Ventilation holes are provided on the circular vent plate, and the annular blocking sealing plate is located on the periphery of the circular vent plate. When the one-way flap is closed, the top opening end is tightly fitted with the lower surface of the annular blocking sealing plate, which is a sealed state. When the one-way flap is open, there is a gap between the top opening end and the lower surface of the annular blocking sealing plate, which is a ventilated state.

[0011] Furthermore, the micro-negative pressure control structure is movably disposed within the ventilation riser via a second drive mechanism; the second drive mechanism includes a spiral shaft and a rotary motor, the spiral shaft is rotatably disposed within the ventilation riser, and the rotary motor is configured to drive the spiral shaft to rotate; both the upper and lower filter plates have threaded holes at their centers that are adapted to the spiral shaft; the spiral shaft passes through the micro-negative pressure control structure, and when the rotary motor drives the spiral shaft to rotate, the micro-negative pressure control structure can reciprocate linearly along the axis of the spiral shaft.

[0012] Furthermore, the spiral shaft is connected to the support via a bearing, and the support is located inside the ventilation riser.

[0013] Furthermore, the first driving mechanism includes a moving block, which has an internal module and an external module coaxially nested together; the internal module is a hollow cylindrical structure with a first cylindrical cavity, the inner wall of which is provided with an internal thread that is adapted to the external thread of the spiral shaft; the external module has a second cylindrical cavity, the inner diameter of which is larger than the inner diameter of the first cylindrical cavity; wherein, the internal module and the external module are driven by an electromagnetic principle to realize the internal module rotating and rising and falling along the spiral shaft, thereby realizing the switching of the unidirectional diaphragm flap between the closed state and the open state.

[0014] Furthermore, the internal module is made of permanent magnet material, with the upper axial end of the internal module being the north pole and the lower axial end being the south pole; the external module has a permanent magnet inner wall layer and an electromagnetic induction coil arranged around the permanent magnet inner wall layer, with the upper axial end of the permanent magnet inner wall layer being the south pole and the lower axial end being the north pole; the external module also has an electromagnetic induction drive device, which causes the internal module to rotate under the drive of electromagnetic induction by passing alternating current through the electromagnetic induction coil.

[0015] On the other hand, a linkage-controlled micro-negative pressure drainage system is provided, characterized in that it includes a dual-pipe drainage system, which has a venting riser and a drainage riser. The drainage riser and the venting riser are connected by an oblique tee, and a pressure sensor is provided on the oblique tee. The aforementioned micro-negative pressure control structure is movably provided inside the venting riser.

[0016] Compared with existing technologies, the micro-negative pressure control structure and linkage control micro-negative pressure drainage system provided by this utility model, based on a dual-pipe system, realizes the monitoring and linkage pressure regulation of the drainage system in residential buildings. On the one hand, it stabilizes the pressure fluctuations in the drainage system during drainage, reduces damage to the water seal of the floor drain, and effectively avoids the loss of the water seal of the floor drain during drainage. On the other hand, when the water seal of the floor drain loses part of its height, the pressure in the drainage pipe system is adjusted to maintain a micro-negative pressure state at the floor drain, preventing pathogenic microorganisms in the pipes from entering the room with the gas through the floor drain due to positive drainage pressure or chimney effect. This improves the hygiene and safety of drainage in residential buildings, protects the health of people in the residential buildings, and plays an important role in building a livable and healthy indoor living environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the micro-negative pressure control structure provided by this utility model;

[0019] Figure 2 A schematic diagram of the moving block of the micro-negative pressure control structure provided by this utility model;

[0020] Figure 3 A cross-sectional schematic diagram of the moving block of the micro-negative pressure control structure provided by this utility model;

[0021] Figure 4 A top view of the upper filter plate of the micro-negative pressure regulation structure provided by this utility model;

[0022] Figure 5 A schematic diagram of the lower filter plate of the micro-negative pressure regulation structure provided by the present invention;

[0023] Figure 6 A schematic diagram (bottom layer) of the linkage-controlled micro-negative pressure drainage system provided by this utility model;

[0024] Figure 7 A schematic diagram (bottom layer) of the linkage-controlled micro-negative pressure drainage system provided by this utility model.

[0025] Figure label:

[0026] 1. Ventilation riser; 2. Drainage riser; 3. Micro-negative pressure control structure; 31. Cylindrical outer shell; 32. One-way membrane flap; 33. Upper filter plate; 331. Circular ventilation plate; 332. Annular blocking sealing plate; 34. Lower filter plate; 341. Limiting cylinder; 35. Spiral shaft; 36. Rotary motor; 37. Support; 38. Moving block; 381. Internal module; 382. External module; 3821. Permanent magnet inner wall layer; 3822. Limiting hole; 4. Oblique tee; 5. Pressure sensor; 6. Bottom outlet pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0029] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0030] Example 1

[0031] A specific embodiment of this utility model is as follows: Figures 1 to 7 As shown, a micro-negative pressure control structure is disclosed. The micro-negative pressure control structure 3 has a cylindrical shell 31, a sealing element, and a first driving mechanism. The outer wall of the cylindrical shell 31 is in sliding sealing contact with the inner wall of the ventilation riser 1. The sealing element is disposed inside the cylindrical shell 31, dividing the internal space of the cylindrical shell 31 into an upper space and a lower space. The sealing element is connected to the first driving mechanism, and the sealing element can realize the connection and disconnection of the upper space and the lower space under the drive of the first driving mechanism.

[0032] This embodiment also provides a linkage-controlled micro-negative pressure drainage system, such as Figures 6 to 7 As shown, it includes a dual-pipe drainage system with a venting riser 1 and a drainage riser 2 connected to each other. The drainage riser 2 and the venting riser 1 are connected by an oblique tee 4, and a pressure sensor 5 is provided on the oblique tee 4. A micro-negative pressure regulating structure 3 is movably located inside the venting riser 1 and can be moved to a designated position inside the venting riser 1. It is configured to regulate the pressure of the dual-pipe drainage system.

[0033] In one alternative implementation, such as Figure 1 As shown, the sealing element includes a one-way diaphragm flap 32, which is disposed inside the cylindrical shell 31. The one-way diaphragm flap 32 has a top open end and a bottom closed end. The bottom closed end is connected to a first driving mechanism. The first driving mechanism can switch the one-way diaphragm flap 32 between a closed state and an open state by driving the bottom closed end to move linearly back and forth along the axis of the cylindrical shell 31.

[0034] In this embodiment, we continue to refer to... Figure 1The micro-negative pressure control structure 3 also has an upper filter plate 33 and a lower filter plate 34. Both the upper filter plate 33 and the lower filter plate 34 are provided with vent holes to allow gas to pass through. The upper filter plate 33 and the lower filter plate 34 can have the same structure. The upper filter plate 33 and the lower filter plate 34 are respectively fixed to the axial openings at both ends of the cylindrical shell 31.

[0035] Specifically, such as Figure 4 As shown, the upper filter plate 33 has an integrally formed circular vent plate 331 and an annular blocking sealing plate 332. Ventilation holes are provided on the circular vent plate 331, and the annular blocking sealing plate 332 is located around the circular vent plate 331. When the one-way membrane flap 32 is closed, its top opening end is tightly fitted to the lower surface of the annular blocking sealing plate 332, achieving a sealed state. When the one-way membrane flap 32 is open, there is a gap between its top opening end and the lower surface of the annular blocking sealing plate 332, allowing for ventilation. In other words, the upper filter plate 33 not only has a ventilation function but also functions to achieve a seal in conjunction with the one-way membrane flap 32. Therefore, ventilation holes are provided in the middle part of the upper filter plate 33, and an annular area without ventilation holes is reserved at the edge of the upper filter plate 33. The top opening end of the one-way membrane flap 32 can abut against the lower surface of this area without ventilation holes, achieving a seal.

[0036] In this embodiment, the micro-negative pressure control structure 3 is movably installed inside the ventilation riser 1 via the second drive mechanism.

[0037] In one alternative implementation, continue to refer to Figure 1 The second drive mechanism includes a helical shaft 35 and a rotary motor 36. The helical shaft 35 is rotatably disposed inside the ventilation riser 1. The output shaft of the rotary motor 36 is connected to the lower end of the helical shaft 35. The rotary motor 36 is configured to drive the helical shaft 35 to rotate. The helical shaft 35 is disposed through the micro negative pressure control structure 3. When the rotary motor 36 drives the helical shaft 35 to rotate, the micro negative pressure control structure 3 can move linearly back and forth along the axis of the helical shaft 35.

[0038] Specifically, the outer diameter of the annular barrier sealing plate 332 of the upper filter plate 33 is equal to the inner diameter of the cylindrical shell 31. The outer peripheral sidewall of the annular barrier sealing plate 332 is fixed and in sealed contact with the inner wall of the cylindrical shell 31. The diameter of the top opening of the one-way membrane flap 32 is smaller than the inner diameter of the cylindrical shell 31 and larger than the inner diameter of the annular barrier sealing plate 332 of the upper filter plate 33. That is, the diameter of the top opening of the one-way membrane flap 32 is larger than the inner diameter of the annular barrier sealing plate 332 and smaller than the outer diameter of the annular barrier sealing plate 332. In this way, the top opening of the one-way membrane flap 32 can abut against the lower surface of the annular barrier sealing plate 332, and the two achieve sealed contact. The spiral shaft 35 passes through the center of the upper filter plate 33 and the lower filter plate 34. The center of the upper filter plate 33 and the lower filter plate 34 are provided with threaded holes that are compatible with the spiral shaft 35. A vertical guide rail is provided between the cylindrical shell 31 and the inner wall of the ventilation riser 1. By setting the vertical guide rail, when the spiral shaft 35 rotates, the upper filter plate 33 and the lower filter plate 34 rise or fall along the spiral shaft 35, while the cylindrical shell 31 cannot rotate. The cylindrical shell 31 moves up and down together with the upper filter plate 33 and the lower filter plate 34, thereby realizing the overall movement of the micro negative pressure control structure 3. For example, a vertical guide rail protrudes from the inner wall of the ventilator riser 1 and can be integrally formed with the ventilator riser 1. The vertical guide rail protrudes parallel to the axis of the ventilator riser 1. The outer wall of the cylindrical shell 31 has a groove. The vertical guide rail can be sealed and slidably installed in the groove of the cylindrical shell 31. The outer surface of the vertical guide rail is smooth, and the groove of the cylindrical shell 31 has a smooth groove wall. The setting of the vertical guide rail does not affect the sealing performance between the outer wall of the cylindrical shell 31 and the inner wall of the ventilator riser 1. Optionally, the vertical guide rail can be a smooth semi-cylindrical shape, that is, the cross-section of the vertical guide rail is semi-circular, and the groove on the outer wall of the cylindrical shell 31 has a smooth semi-circular groove wall, which matches the smooth outer surface of the vertical guide rail.

[0039] In this embodiment, the micro-negative pressure regulating structure 3 is installed at least at the bottom layer of the double-pipe drainage system via supports 37 at both the upper and lower ends. Figure 6 ) and top layer ( Figure 7 At the location of the ventilation riser 1, a bearing is provided on the support 37, and the top and bottom ends of the spiral shaft 35 are connected to the support 37 via the bearing. Specifically, the spiral shaft 35 is connected to the support 37 via the bearing, and the support 37 is located inside the ventilation riser 1. There is a ventilation channel between the support 37 and the inner wall of the ventilation riser 1, that is, the support 37 installed inside the ventilation riser 1 will not obstruct the ventilation of the ventilation riser 1.

[0040] In one alternative implementation, see Figures 2 to 3The first driving mechanism includes a movable block 38, which is connected to the bottom of the unidirectional membrane flap 32 and mounted on the lower filter plate 34. It can move up and down on the spiral shaft 35. The movable block 38 has an inner module 381 and an outer module 382 coaxially nested. The inner module 381 is a hollow cylindrical structure fitted onto the spiral shaft 35. The inner module 381 has a first cylindrical cavity, the inner wall of which is provided with an internal thread that matches the external thread of the spiral shaft 35. The outer surface of the inner module 381... The surface is smooth; the outer module 382 has a second cylindrical cavity, the inner diameter of which is larger than that of the first cylindrical cavity; the outer shape of the outer module 382 can be a cuboid, and the hollow cuboid structure of the outer module 382 is fitted outside the inner module 381, with a certain gap between them; wherein, the inner module 381 and the outer module 382 are driven by electromagnetic principle to realize the rotation and lifting of the inner module 381 along the spiral shaft 35, thereby realizing the switching of the unidirectional diaphragm flap 32 between the closed state and the open state.

[0041] Specifically, the inner module 381 is made of permanent magnet material, with the upper axial end of the inner module 381 being the north pole and the lower axial end being the south pole; the outer module 382 is provided with a permanent magnet inner wall layer 3821, with the upper axial end of the permanent magnet inner wall layer 3821 being the south pole and the lower axial end being the north pole. It can also be understood that the cavity wall of the second cylindrical cavity is made of a thinner permanent magnet material, with the upper part being the south pole and the lower part being the north pole.

[0042] In one alternative embodiment, the outer module 382 and the lower filter plate 34 can only move relative to each other in the vertical direction, but cannot rotate relative to each other. For example, Figure 5 The diagram illustrates one structure of the lower filter plate 34. The difference between the lower filter plate 34 and the upper filter plate 33 is that the lower filter plate 34 is further provided with two limiting cylinders 341. These two limiting cylinders 341 are perpendicular to the lower filter plate 34 and symmetrically arranged on both sides of the center line of the central through hole in the lower filter plate 34. The external module 382 is provided with two symmetrical limiting holes 3822. The two limiting cylinders 341 on the lower filter plate 34 can be inserted into the two limiting holes 3822 on the external module 382. The two limiting cylinders 341 and the two limiting holes 3822 constrain the positions of the external module 382 and the lower filter plate 34, allowing them to move relative to each other only in the vertical direction.

[0043] Furthermore, an electromagnetic induction coil is arranged around the second cylindrical cavity in the external module 382, ​​and an electromagnetic induction drive device (not shown in the figure) is also provided in the external module 382. That is to say, the external module 382 is also provided with an electromagnetic induction coil arranged around the inner wall layer 3821 of the permanent magnet, and the external module 382 is also provided with an electromagnetic induction drive device. The electromagnetic induction drive device causes the internal module 381 to rotate under the drive of electromagnetic induction by passing an alternating current through the electromagnetic induction coil. By changing the direction of the alternating current, the internal module 381 can drive the entire moving block 38 to move up and down relative to the spiral shaft 35, so as to achieve the effect of opening and closing the unidirectional diaphragm flap 32. At this time, the entire micro negative pressure control structure 3 has no displacement relative to the spiral shaft 35.

[0044] After the opening and closing of the one-way membrane flap 32 is completed, no AC power is supplied. That is, when the one-way membrane flap 32 is opened, that is, when the moving block 38 moves downward and contacts the lower filter plate 34, no AC power is supplied; when the one-way membrane flap 32 is closed, that is, when the moving block 38 moves upward, when the top opening of the one-way membrane flap 32 contacts the upper filter plate 33, no AC power is supplied; when the spiral shaft 35 rotates, the internal module 381 and the external module 382 can move up and down synchronously due to magnetic attraction. During this process, the two are relatively stationary. In this way, the moving block 38 can move up and down together with the entire micro-negative pressure control structure 3 on the spiral shaft 35 while relatively stationary through the thread of the internal module 381, thereby realizing the position adjustment of the entire micro-negative pressure control structure 3 in the ventilation riser 1.

[0045] In one alternative embodiment, the cylindrical outer shell 31 is made of hard silicone material; the one-way diaphragm flap 32 is made of flexible silicone material and has a certain thickness; since the one-way diaphragm flap 32 is made of flexible silicone material, when extreme situations occur, i.e., when the positive pressure is extremely high, the one-way diaphragm flap 32 can contract towards the center under the pressure, so as to avoid poor ventilation and the positive pressure cannot be released, thereby damaging the drain seal.

[0046] In one alternative embodiment, the spiral shaft 35 is made of UPVC material.

[0047] In one alternative embodiment, the outer wall of the cylindrical shell 31 is coated with a lubricating and sealing gel-like substance, such as petroleum jelly, so that it can fit tightly against the inner wall of the ventilation riser 1 to ensure a sliding seal effect.

[0048] In this embodiment, if the building has a high floor, a micro-negative pressure control structure 3 can be added to the lower floors. The pressure sensors 5 of each floor are staggered on the oblique tee 4 connecting the drainage riser 2 and the ventilation riser 1, with at least three installed on the same floor. An electrically controlled valve is installed at the outlet pipe 6 on the ground floor.

[0049] The working process of the linkage-controlled micro-negative pressure drainage system is as follows:

[0050] When drainage begins, the electrically controlled valve installed at the bottom outlet pipe 6 opens, controlling the one-way diaphragm 32 of the micro-negative pressure regulating structure 3 to be in the open state. Air is discharged upward through the gap between the one-way diaphragm 32 and the cylindrical shell 31, achieving the purpose of balancing positive pressure. In other words, when drainage begins on the upper floors, the rapidly descending water flow will create positive pressure on the lower floors of the drainage pipe. According to experimental experience, the maximum positive pressure will be formed at the bottom floor, causing liquid splashing loss in the floor drain water seal. At this time, the pressure sensors 5 of the top and bottom floors sense the pressure fluctuation, and the electrically controlled valve installed at the bottom outlet pipe 6 opens. The moving block 38 in the micro-negative pressure regulating structure 3 moves downward. By driving the moving block 38 downward, the top opening end of the one-way diaphragm 32 separates from the lower surface of the annular blocking sealing plate 332 of the upper filter plate 33. The air in the lower space of the cylindrical shell 31 is discharged upward through the gap between the one-way diaphragm 32 and the cylindrical shell 31, achieving the purpose of balancing positive pressure and avoiding positive pressure splashing at the floor drain water seal, which would cause losses.

[0051] After the drainage is completed, when the pressure sensor 5 located at the bottom layer detects that the positive pressure is close to 0, the electrically controlled valve installed at the bottom layer outlet pipe 6 will close.

[0052] The one-way membrane flap 32 of the micro-negative pressure control structure 3 is in a closed state, preventing air from passing through. In other words, the moving block 38 of the micro-negative pressure control structure 3 moves upward, causing the top opening of the one-way membrane flap 32 to fit tightly against the lower surface of the annular blocking sealing plate 332 of the upper filter plate 33, preventing air from passing through.

[0053] After drainage is completed and the one-way diaphragm 32 is adjusted to the closed state, based on the pressure at the top and bottom of the dual riser drainage system monitored by the pressure sensor 5, the rotary motor 36 drives the spiral shaft 35 to rotate, so that the micro negative pressure regulating structure 3 moves up and down in the ventilation riser 1 to regulate the bottom pressure and top pressure in the pipeline to the target pressure value range, and the micro negative pressure regulating structure 3 stops working.

[0054] Because relevant national standards stipulate that drainage components such as floor drains and water traps in residential buildings should be equipped with water seals with a height of not less than 50mm, the entire drainage system is in a completely sealed state after drainage is completed. Simultaneously, pressure sensors 5 at the top and bottom of the system measure the pressure at the top and bottom of the dual-pipe drainage system, respectively. The rotating motor 36 of the micro-negative pressure regulating structure 3 controls the rotation of the spiral shaft 35, causing the micro-negative pressure regulating structure 3 to move up and down within the venting riser 1, thereby regulating the pressure within the pipe. Optionally, the target pressure range for the bottom layer is -2 to -5 Pa, and the target pressure range for the top layer is -15 to -18 Pa.

[0055] After the top opening of the one-way membrane flap 32 is tightly fitted with the upper filter plate 33, the micro-negative pressure regulating structure 3 can adjust the pressure by moving the micro-negative pressure regulating structures 3 located at the top and bottom layers up and down on the spiral shaft 35 to achieve a state of micro-negative pressure inside the pipe. For example, if the micro-negative pressure regulating structure 3 located at the top layer moves upward while the micro-negative pressure regulating structure 3 located at the bottom layer remains stationary, a negative pressure state can be formed (similar to the principle of suction); however, in order to reach the set pressure value, the bottom micro-negative pressure regulating structure 3 can move up and down simultaneously, so that both the upper and lower pipes reach the set pressure value when the overall pressure inside the drainage system is relatively stable.

[0056] After a single drainage, the micro-negative pressure state in the system is broken. At this time, the top opening of the unidirectional membrane flap 32 in the micro-negative pressure control structure 3 of the top and bottom layers is separated from the corresponding upper filter plate 33. The overall micro-negative pressure control structure 3 moves down along the spiral shaft 35 to the vicinity of the support 37 below. After the drainage is completed, the micro-negative pressure control structure 3 moves again to control the drainage system to form a micro-negative pressure state.

[0057] Compared with existing technologies, the micro-negative pressure control structure and linkage control micro-negative pressure drainage system provided in this embodiment, based on a dual-pipe system, realizes the monitoring and linkage pressure regulation of the drainage system in residential buildings. On the one hand, it stabilizes the pressure fluctuations in the drainage system during drainage, reduces damage to the water seal of the floor drain, and effectively avoids the loss of the water seal of the floor drain during drainage. On the other hand, when the water seal of the floor drain loses part of its height, the pressure in the drainage pipe system is adjusted to keep the floor drain in a micro-negative pressure state, preventing pathogenic microorganisms in the pipes from entering the room with the gas through the floor drain due to positive drainage pressure or chimney effect. This improves the hygiene and safety of drainage in residential buildings, protects the health of people in the residential buildings, and plays an important role in building a livable and healthy indoor living environment.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A micro-negative pressure regulation structure, characterized in that, It includes a cylindrical shell (31), a sealing element, and a first driving mechanism; the outer wall of the cylindrical shell (31) is in sliding sealing contact with the inner wall of the ventilation riser (1); the sealing element is disposed inside the cylindrical shell (31) and divides the internal space of the cylindrical shell (31) into an upper space and a lower space; the sealing element is connected to the first driving mechanism and can realize the connection and disconnection of the upper space and the lower space under the drive of the first driving mechanism.

2. The micro-negative pressure control structure according to claim 1, characterized in that, The sealing element includes a one-way diaphragm flap (32), which is disposed inside the cylindrical shell (31). The one-way diaphragm flap (32) is switched between a closed state and an open state by the first driving mechanism.

3. The micro-negative pressure control structure according to claim 2, characterized in that, The cylindrical outer shell (31) is made of hard silicone material; The unidirectional flap (32) is made of flexible silicone material.

4. The micro-negative pressure control structure according to claim 2 or 3, characterized in that, The one-way flap (32) has a top open end and a bottom closed end. The bottom closed end is connected to the first driving mechanism. The first driving mechanism can switch the one-way flap (32) between a closed state and an open state by driving the bottom closed end to move linearly back and forth along the axis of the cylindrical shell (31).

5. The micro-negative pressure control structure according to claim 4, characterized in that, The micro negative pressure control structure (3) also has an upper filter plate (33) and a lower filter plate (34), which are respectively located at the two axial openings of the cylindrical shell (31); The upper filter plate (33) has an integrally formed circular vent plate (331) and an annular barrier sealing plate (332). Ventilation holes are provided on the circular vent plate (331), and the annular barrier sealing plate (332) is located on the periphery of the circular vent plate (331). When the one-way flap (32) is closed, the top opening end is tightly fitted with the lower surface of the annular blocking sealing plate (332), thus forming a sealed state. When the one-way flap (32) is in the open state, there is a gap between the top opening end and the lower surface of the annular blocking sealing plate (332), which is in a ventilated state.

6. The micro-negative pressure control structure according to claim 5, characterized in that, The micro negative pressure control structure (3) is movably disposed in the ventilation riser (1) via a second drive mechanism; the second drive mechanism includes a spiral shaft (35) and a rotary motor (36), the spiral shaft (35) is rotatably disposed in the ventilation riser (1), and the rotary motor (36) is configured to drive the spiral shaft (35) to rotate; the upper filter plate (33) and the lower filter plate (34) are each provided with a threaded hole adapted to the spiral shaft (35) at their center; The spiral shaft (35) is set through the micro negative pressure control structure (3), and when the rotary motor (36) drives the spiral shaft (35) to rotate, the micro negative pressure control structure (3) can move linearly back and forth along the axis of the spiral shaft (35).

7. The micro-negative pressure control structure according to claim 6, characterized in that, The spiral shaft (35) is connected to the support (37) by a bearing, and the support (37) is located inside the ventilation riser (1).

8. The micro-negative pressure control structure according to claim 6, characterized in that, The first driving mechanism includes a moving block (38), which has an inner module (381) and an outer module (382) arranged coaxially nested. The internal module (381) is a hollow cylindrical structure with a first cylindrical cavity. The inner wall of the first cylindrical cavity is provided with an internal thread, which is adapted to the external thread of the spiral shaft (35). The external module (382) has a second cylindrical cavity, the inner diameter of which is larger than the inner diameter of the first cylindrical cavity; The internal module (381) and the external module (382) are driven by electromagnetic principle, so that the internal module (381) rotates and rises and falls along the spiral shaft (35), thereby enabling the one-way flap (32) to switch between closed and open states.

9. The micro-negative pressure control structure according to claim 8, characterized in that, The internal module (381) is made of permanent magnet material, with the upper axial end of the internal module (381) being the North Pole and the lower axial end being the South Pole; The external module (382) is provided with a permanent magnet inner wall layer (3821) and an electromagnetic induction coil arranged around the permanent magnet inner wall layer (3821). The upper axial end of the permanent magnet inner wall layer (3821) is the south pole and the lower axial end is the north pole. The external module (382) is also provided with an electromagnetic induction drive device, which causes the internal module (381) to rotate under the drive of electromagnetic induction by passing an alternating current through the electromagnetic induction coil.

10. A linkage-controlled micro-negative pressure drainage system, characterized in that, The system includes a dual-pipe drainage system, which has a venting riser (1) and a drainage riser (2). The drainage riser (2) is connected to the venting riser (1) via a tee (4), and a pressure sensor (5) is provided on the tee (4). The ventilation riser (1) is movably provided with a micro negative pressure control structure (3) as described in any one of claims 1 to 9.

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