Positive and negative pressure resistant sealing device of a two-way valve plate of a balancing shaft used for a drain pipe

Description

TECHNICAL FIELD

[0001] The present application relates to sewer line water seal protection. More specifically, the present application relates to a positive and negative pressure resistant sealing device for drainage pipelines.BACKGROUND

[0002] Sewer pipelines are essential for buildings to discharge sewage and they also play a crucial role in supporting public facilities in a city. To prevent sewage and toxic gases from overflowing in the pipelines, anti-odor devices are usually installed. These devices adopt a water-sealed structure that relies on water seals to isolate the used space from the sewer pipelines. This functional technology is highly effective in preventing unpleasant odors and harmful gases from spreading. In a utility model patent called "Automatic Sealing Sewer Pipe Deodorizer" with publication number CN201809833U, a device has been designed that can be installed on any sewer pipe. This device has a deodorant flap body that is opened downward by the weight of the water flow when in use, allowing the water to flow normally. When not in use, the weight of the counterweight body causes the deodorizing flap body and the automatic deodorizing valve body to close. However, if there is a large negative pressure in the existing sewer pipeline, the air pressure at the upper end of the deodorizing flap body becomes greater than the air pressure at the lower end, which causes the anti-odor flap body to open. At this point, the water seal in the drainage device can be sucked away by the negative pressure of the sewer line, which destroys the protective function of the water seal. This can cause odor to overflow into the used space when the air pressure in the sewer line is greater than the air pressure of the use space. This is not desirable as it does not meet the increasing environmental quality requirements of modern urban buildings.

[0003] Chinese patent No. CN113818545B describes a magnetic sealing drain core with an innovative dual-magnet system and water-film sealing. Its key innovations are the magnetic actuation mechanism and the water-trap design. Chinese patent No. CN211228754U presents a drainage device with gravity-magnetic hybrid sealing. Its uniqueness lies in the leveraged sealing force and avoidance of immersion issues. Chinese patent No. CN215406335U offers a dual-defense drainpipe combining water sealing with a suspended flapper valve. The valve's positioning above the waterline is critical.SUMMARY

[0004] The present invention overcomes the limitations of existing technology by providing a sealing device capable of withstanding both positive and negative pressure for a balance shaft two-way valve plate used in drainage pipelines. This device addresses the problem of existing sewer pipelines where large negative pressure can cause the anti-odor flap body at the upper end to open due to greater air pressure than the lower end, thus leading to suction of the water seal in the drainage device and destruction of its protective function. This can result in unpleasant odors overflowing into the use space. Additionally, there are instances where the air pressure in the sewer line exceeds the air pressure of the use space, which can also cause the odor to overflow.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a positive and negative pressure resistant sealing device for drainage pipelines, comprising a main body, a pressure conductor and a balance shaft two-way power valve plate; the main body comprising a pressure conduction chamber and a drainage cavity; the pressure conduction chamber is located on the side of the drainage cavity; the pressure conductor is arranged in the pressure conduction chamber of the main body; an upper end of the pressure conduction chamber has an inclined slope structure; wherein at the upper end of the pressure conduction chamber, there is an orifice; an upper end face of the orifice is provided with a pressure conducting membrane; a lower end of the pressure conducting membrane is in contact with an upper wall surface of the pressure conductor; wherein a transmission connecting rod is fixedly installed at a lower end of the pressure conductor; wherein a limited bottom cover is fixedly installed on a lower wall of the pressure conduction chamber; wherein the transmission connecting rod runs through the limited bottom cover ; the lower end of the transmission connecting rod has an arc surface structure; wherein a pair of balance stands are fixedly installed on the lower wall of the limited bottom cover; the balance shaft two-way power valve plate is rotatably connected between the pair of the balance stands; wherein a support rod is fixedly installed on an upper wall of a left end of the balance shaft two-way power valve plate; an upper end of the support rod has an arc surface structure; the lower end of the transmission connecting rod is in contact with the upper end of the support rod; a right end of the balance shaft two-way power valve plate is fixedly installed with an open-close valve plate ; the open-close valve plate is in contact with a lower end port of the drainage cavity; wherein a magnetic core holder is fixedly installed between the pair of balance stands and above the balance shaft two-way power valve plate; wherein the magnetic core holder and the balance shaft two-way power valve plate are provided with a magnetic core power source.

[0006] Preferably, the empty part of the pressure conduction cavity formed on one side of the main body cavity is the drainage cavity.

[0007] Preferably, the magnetic core power source includes a first fixed magnetic core, a second fixed magnetic core, a first moving magnetic core and a second moving magnetic core. The first fixed magnetic core and the second fixed magnetic core are fixedly installed on the magnetic core holder from left to right. The first moving magnetic core and the second moving magnetic core are fixedly installed on the balance shaft two-way power valve plate from left to right.

[0008] Preferably, the pressure conductor, the pressure conducting membrane and the limited cover are parallel to each other.

[0009] Preferably, a limit plate is fixedly installed on the lower wall of the pressure conductor and on one side of the transmission connecting rod; wherein the limit plate is located in the pressure conduction chamber.

[0010] Preferably, the balance shaft two-way power valve plate has rotating shafts fixedly installed on the front and rear walls respectively; wherein the balance shaft two-way power valve plate is rotatably connected between a pair of balance stands through a shaft.

[0011] Preferably, an air pressure conduction hole located on the lower wall of the limited bottom cover and on one side of the transmission connecting rod.

[0012] Preferably, the lower end port of the drainage cavity is fixedly installed with a sealing ring.Beneficial effects of the invention:

[0013] This invention provides a sealing device for a balance shaft two-way valve plate used in drainage pipelines that is capable of withstanding both positive and negative pressure. The device solves a common issue found in existing sewer pipelines, where a large negative pressure can cause a difference in air pressure between the upper and lower ends of the anti-odor flap body. This difference in pressure can cause the water seal in the drainage device to be sucked away, destroying its protective function. When the pressure in the sewer line is greater than the pressure in the use space, the odor can overflow.

[0014] To solve this issue, the present invention utilizes a pressure conduction film, a transmission connecting rod, and a pressure conductor. When the pressure at the upper end of the water seal is greater than the pressure at the lower end, the pressure film withstands the pressure conductor, causing the pressure conductor to push the transmission connecting rod. This action causes the transmission connecting rod to resist the support rod, preventing the support rod from forming a rotation tendency. As a result, the balance shaft two-way power valve plate is not driven to open the start-up valve plate and the closing valve plate, thereby effectively preventing the odor in the sewer pipe from dispersing.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG.1 is a perspective view of a positive and negative pressure resistant sealing device for drainage pipelines; FIG.2 is a front view of a positive and negative pressure resistant sealing device for drainage pipelines; FIG.3 is a sectional view of a positive and negative pressure resistant sealing device for drainage pipelines; FIG.4 is a top plan view of a positive and negative pressure resistant sealing device for drainage pipelines; FIG.1 is an exploded view of a positive and negative pressure resistant sealing device for drainage pipelines; As show in FIGS.1-5: 1. main body; 2.pressure conduction chamber; 3.Drainage cavity; 4.pressure conductor; 5.transmission connecting rod; 6. air pressure conduction hole; 7.pressure conducting membrane; 8.limited bottom cover; 9.balance shaft two-way power valve plate; 10.support rod; 11.shaft; 12. balance stand; 13.magnetic core holder; 14.open-close valve plate; 15.sealing ring; 16. first fixed magnetic core; 17. second fixed magnetic core; 18. first moving magnetic core; 19. second moving magnetic coreDETAILED DESCRIPTION OF EMBODIMENTS

[0016] While the technology is susceptible to various modifications and alternative forms, specifics thereof have been shown by way of example and drawings, and will be described in detail. It should be understood, however, that the application is not limited to the particular embodiments described. The invention is defined by the appended claims.

[0017] A positive and negative pressure resistant sealing device for drainage pipelines, comprising a main body, a pressure conductor and a balance shaft two-way power valve plate; the main body comprising a pressure conduction chamber and a drainage cavity; the pressure conduction chamber is located on the side of the drainage cavity; the pressure conductor is arranged in the pressure conduction cavity of the main body; the upper end of the pressure conduction chamber 2 has an inclined slope structure; wherein at the upper end of the pressure conduction chamber 2, there is an orifice; the upper end face of the orifice is provided with a pressure conducting membrane 7; the lower end of the pressure conducting membrane 7 is in contact with the upper wall surface of the pressure conductor 4; wherein a transmission connecting rod 5 is fixedly installed at the lower end of the pressure conductor 4; wherein a limited bottom cover 8 is fixedly installed on the lower wall of the pressure conduction chamber 2; wherein the transmission connecting rod 5 runs through the limited bottom cover 8; the lower end of the transmission connecting rod 5 has an arc surface structure; wherein a pair of balance stand 12 are fixedly installed on the lower wall of the limited bottom cover 8; the balance shaft two-way power valve plate 9 is rotatably connected between a pair of the balance stand 12; wherein a support rod 10 is fixedly installed on the upper wall of the left end of the balance shaft two-way power valve plate 9; the upper end of the support rod 10 has an arc surface structure; the lower end of the transmission connecting rod 5 is in contact with the upper end of the support rod 10; the right end of the balance shaft two-way power valve plate 9 is fixedly installed with an open-close valve plate 14; the open-close valve plate 14 is in contact with the lower end port of the drainage cavity 3; wherein a core holder 13 is fixedly installed between a pair of balance stand 12 and above the balance shaft two-way power valve plate 9; wherein the magnetic core holder 13 and the balance shaft two-way power valve plate 9 are provided with a magnetic core power source. The magnetic core power source includes a first fixed magnetic core 16, a second fixed magnetic core 17, a first moving magnetic core 18 and a second moving magnetic core 19. The first fixed magnetic core 16 and the second fixed magnetic core 17 are fixedly installed on the magnetic core holder 13 from left to right. The first moving magnetic core 18 and the second moving magnetic core 19 are fixedly installed on the balance shaft two-way power valve plate 9 from left to right. Wherein the pressure conductor 4, the pressure conducting membrane 7 and the limited cover 8 are parallel to each other. Wherein a limit plate is fixedly installed on the lower wall of the pressure conductor 4 and on one side of the transmission connecting rod 5; wherein the limit plate is located in the pressure conduction chamber 2. Wherein the balance shaft two-way power valve plate 9 has rotating shafts 11 fixedly installed on the front and rear walls respectively; wherein the balance shaft two-way power valve plate 9 is rotatably connected between a pair of balance stands 12 through a shaft 11. Wherein an air pressure conduction hole 6 located on the lower wall of the limited bottom cover 8 and on one side of the transmission connecting rod 5. Wherein the lower end port of the drainage cavity 3 is fixedly installed with a sealing ring 15.

[0018] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and the specific work.

[0019] In an embodiment, according to the accompanying drawings, when negative pressure occurs in the sewer line, there is a pressure difference between the upper and lower ends of the pressure conducting membrane 7 (the pressure conducting membrane 7 is made of high-elastic rubber material). The pressure at the upper end of the pressure conducting membrane 7 is greater than the pressure at the lower end. The pressure generated by the pressure difference acts on the pressure conductor 4. The pressure conductor 4 generates downward pressure, causing the lower end of the transmission connecting rod 5 to act on the upper end of the support rod 10 of the balance shaft 11 two-way power valve plate 9. The arc surface at the lower end of the transmission connecting rod 5 is in contact with the arc surface at the upper end of the support rod 10. The shaft 11 of the balance shaft two-way power valve plate 9 generates a resistance torque that prevents the open-close valve plate 14 from opening. When the open-close valve plate 14 of the balance shaft two-way power valve plate 9 responds to the negative pressure of the sewer line, a pressure difference is created between the upper and lower ends. The pressure at the upper end is higher than the one at the lower end, which results in downward pressure. There is also the torque to open the open-close valve plate 14. When the closing torque of the open-close valve plate 14 is greater than or equal to its opening torque, the balance shaft two-way power valve plate remains closed. The open-close valve plate 14 presses tightly against the sealing ring 16 of the main body 1. The second moving magnetic core 19 is attracted by the second fixed magnetic core 17 to prevent the passage of negative pressure. The purpose of the balance shaft two-way power valve plate 9 is to prevent water seal damage that can occur due to negative pressure in the sewer pipeline. When there is positive pressure or a sewage overflow, the lower end of the open-close valve plate 14 of the balance shaft two-way power valve plate 9 remains closed due to the pressure. When draining water, the pressure of the water acting on the pressure conducting membrane 7 is lower than the pressure of the water on the open-close valve plate 14. As a result, the torque that is generated to prevent the open-close valve plate 14 from opening is less. Balance shaft two-way power valve plate opens for drainage. When water drainage stops, the balance shaft two-way power valve plate 9 attracts the second fixed magnetic core 17 and the second moving magnetic core 19. The torque that closes the open-close valve plate 14 is generated by the repulsion between the first fixed magnetic core and the first moving magnetic core. The open-close valve plate 14 is closed, blocking the water seal and using space in the sewer pipeline.

[0020] While the technology is susceptible to various modifications and alternative forms, specifics thereof have been shown by way of example and drawings, and will be described in detail. It should be understood, however, that the application is not limited to the particular embodiments described. On the contrary, the application is to cover modifications falling under the scope of the appended claims.

Claims

1. A positive and negative pressure resistant sealing device for drainage pipelines, comprising a main body (1), a pressure conductor (4) and a balance shaft two-way power valve plate (9); wherein the main body (1) comprises a pressure conduction chamber (2) and a drainage cavity (3); the pressure conduction chamber (2) is located on the side of the drainage cavity (3); the pressure conductor (4) is arranged in the pressure conduction chamber (2) of the main body (1); an upper end of the pressure conduction chamber (2) has an inclined slope structure; wherein at the upper end of the pressure conduction chamber (2), there is an orifice; an upper end face of the orifice is provided with a pressure conducting membrane (7); a lower end of the pressure conducting membrane (7) is in contact with an upper wall surface of the pressure conductor (4); wherein a transmission connecting rod (5) is fixedly installed at a lower end of the pressure conductor (4); wherein a limited bottom cover (8) is fixedly installed on a lower wall of the pressure conduction chamber (2); wherein the transmission connecting rod (5) runs through the limited bottom cover (8); a lower end of the transmission connecting rod (5) has an arc surface structure; wherein a pair of balance stands (12) are fixedly installed on the lower wall of the limited bottom cover (8); the balance shaft two-way power valve plate (9) is rotatably connected between the pair of the balance stands (12); wherein a support rod (10) is fixedly installed on an upper wall of a left end of the balance shaft two-way power valve plate (9); an upper end of the support rod (10) has an arc surface structure; the lower end of the transmission connecting rod (5) is in contact with the upper end of the support rod (10); a right end of the balance shaft two-way power valve plate (9) is fixedly installed with an open-close valve plate (14); the open-close valve plate (14) is in contact with a lower end port of the drainage cavity (3); wherein a magnetic core holder (13) is fixedly installed between the pair of balance stands (12) and above the balance shaft two-way power valve plate (9); wherein the magnetic core holder (13) and the balance shaft two-way power valve plate (9) are provided with a magnetic core power source.

2. The positive and negative pressure resistant sealing device for drainage pipelines of claim 1, wherein the pressure conductor (4), the pressure conducting membrane (7) and the limited bottom cover (8) are parallel to each other.

3. The positive and negative pressure resistant sealing device for drainage pipelines of claim 1, comprising a limit plate being fixedly installed on a lower wall of the pressure conductor (4) and on one side of the transmission connecting rod (5); wherein the limit plate is located in the pressure conduction chamber (2).

4. The positive and negative pressure resistant sealing device for drainage pipelines of claim 1, wherein the balance shaft two-way power valve plate (9) has rotating shafts fixedly installed on front and rear walls respectively; and the balance shaft two-way power valve plate (9) is rotatably connected between the pair of balance stands (12) through a shaft (11).

5. The positive and negative pressure resistant sealing device for drainage pipelines of claim 1, comprising an air pressure conduction hole (6) located on the lower wall of the limited bottom cover (8) and on one side of the transmission connecting rod (5).

6. The positive and negative pressure resistant sealing device for drainage pipelines of claim 1, wherein the lower end port of the drainage cavity (3) is fixedly installed with a sealing ring (15).