A negative pressure prevention device for a wastewater pipeline

Abstract

The utility model discloses a prevent negative pressure device for wastewater pipeline, including pipeline main part, one side intercommunication fixed mounting of pipeline main part has the three way pipe, one end fixed intercommunication of three way pipe installation has the air cavity, the inside fixed mounting of air cavity has the air pressure sensor, the front side fixed mounting of air cavity has the controller, the other end intercommunication of three way pipe with pipeline main part, one side intercommunication fixed mounting of pipeline main part has the pressure relief pipe, the utility model discloses install air cavity on the pipeline main part, and the air cavity is connected on the pipeline main part through three way pipe to make the air pressure inside pipeline main part with the same in the air cavity, install air pressure sensor in the air cavity to detect whether the air pressure inside pipeline is below one atmosphere, when the air pressure inside pipeline is below one atmosphere, the controller will start electric push rod and move the closing plate to let the outside air enter pipeline main part through the gap between closing plate and pressure relief pipe to change the negative pressure state in pipeline main part.

Description

Technical Field

[0001] This utility model relates to an anti-negative pressure device, specifically an anti-negative pressure device for wastewater pipelines. Background Technology

[0002] Negative pressure in wastewater pipes, also known as a "vacuum" or "siphon effect," is a common phenomenon. Simply put, the core reason for negative pressure in wastewater pipes is that the water flow in the pipe is too fast, causing it to "pull out" the air in the pipes behind it. Since the external air cannot be replenished in time, a local vacuum is formed. When negative pressure is generated in the pipe, it will, like drinking water with a straw, prioritize drawing water that is "easily sucked away" from the trap into the main pipe, causing the water seal level to drop or even be completely drained. To avoid negative pressure in wastewater pipes, it is essential to install anti-negative pressure devices.

[0003] Currently, existing anti-negative pressure devices may have the problem that the valve cannot be opened effectively due to a small pressure difference. Therefore, this application proposes an anti-negative pressure device for wastewater pipelines to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a negative pressure prevention device for wastewater pipelines, so as to solve the problem that the existing negative pressure prevention devices mentioned in the background art may have insufficient pressure difference, resulting in the valve port not being able to open effectively.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A negative pressure prevention device for wastewater pipelines includes a pipeline body. A tee pipe is fixedly installed on one side of the pipeline body. An air chamber is fixedly installed at one end of the tee pipe. A pressure sensor is fixedly installed inside the air chamber. A controller is fixedly installed at the front of the air chamber. The other end of the tee pipe is connected to the pipeline body. A pressure relief pipe with an L-shaped design is fixedly installed on one side of the pipeline body. A one-way valve is installed at one end of the pressure relief pipe. An electric push rod is fixedly installed on one side of the pressure relief pipe. The push rod end of the electric push rod is inserted into the interior of the pressure relief pipe and a sealing plate is fixedly installed thereon. A sealing ring is fixedly installed on the outer side of the sealing plate. The outer side of the sealing ring fits against the pressure relief pipe. The sealing plate is located inside the other end of the pressure relief pipe.

[0007] As a further improvement of this utility model: one end of the three-way pipe is designed to be inclined, and the air chamber is designed to be inclined.

[0008] As a further embodiment of this utility model: a mounting plate is provided inside one end of the pressure relief pipe, a through hole is provided on the mounting plate, a filter screen is fixedly installed in the through hole, and mounting grooves are provided on both sides of the mounting plate. A spring is fixedly installed on one side of the mounting groove, and a limit block is fixedly installed on one end of the spring, with the limit block protruding from the mounting plate.

[0009] As a further improvement of this utility model, limiting holes for the limiting block to pass through are provided on both sides of one end of the pressure relief pipe.

[0010] As a further improvement of this utility model: the pressure sensor is electrically connected to the controller via a wire, and the controller is electrically connected to an external power supply via a wire.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model installs an air chamber on the main body of the pipe, which is connected to the main body of the pipe via a T-connector, so that the air pressure inside the main body of the pipe is the same as that inside the air chamber. An air pressure sensor is installed in the air chamber to detect whether the air pressure inside the pipe is lower than one atmosphere. When the air pressure inside the pipe is lower than one atmosphere, the controller will activate the electric push rod to move the sealing plate, so that outside air enters the main body of the pipe through the gap between the sealing plate and the pressure relief pipe, thereby changing the negative pressure state inside the main body of the pipe.

[0013] 2. This utility model installs a filter screen at one end of the pressure relief pipe to prevent debris from entering the interior of the pressure relief pipe and affecting the movement of the sealing plate. At the same time, the filter screen can be disassembled for cleaning, thereby avoiding affecting the air intake effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the air cavity structure in this utility model.

[0016] Figure 3 This is a cross-sectional view of the pressure relief pipe in this utility model.

[0017] 1. Pipe body; 2. Pressure relief pipe; 3. Check valve; 4. Mounting plate; 5. Electric push rod; 6. T-pipe; 7. Controller; 8. Air chamber; 9. Air pressure sensor; 10. Limit block; 11. Sealing ring; 12. Sealing plate; 13. Filter screen; 14. Spring; 15. Limit hole; 16. Mounting groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3 In this embodiment of the present invention, a negative pressure prevention device for wastewater pipelines includes a pipeline body 1. A three-way pipe 6 is fixedly installed on one side of the pipeline body 1. An air chamber 8 is fixedly installed at one end of the three-way pipe 6. A pressure sensor 9 is fixedly installed inside the air chamber 8. A controller 7 is fixedly installed on the front side of the air chamber 8. The other end of the three-way pipe 6 is connected to the pipeline body 1. A pressure relief pipe 2 is fixedly installed on one side of the pipeline body 1. The pressure relief pipe 2 is L-shaped. A one-way valve 3 is installed at one end of the pressure relief pipe 2. An electric push rod 5 is fixedly installed on one side of the pressure relief pipe 2. The push rod end of the electric push rod 5 is inserted into the interior of the pressure relief pipe 2 and a sealing plate 12 is fixedly installed. A sealing ring 11 is fixedly installed on the outside of the sealing plate 12. The outside of the sealing ring 11 is in contact with the pressure relief pipe 2. The sealing plate 12 is located inside the other end of the pressure relief pipe 2.

[0020] One end of the three-way pipe 6 is designed at an angle, and the air chamber 8 is designed at an angle.

[0021] An installation plate 4 is provided inside one end of the pressure relief pipe 2. A through hole is provided on the installation plate 4, and a filter screen 13 is fixedly installed inside the through hole. Installation grooves 16 are provided on both sides of the installation plate 4. A spring 14 is fixedly installed on one side of the installation groove 16. A limit block 10 is fixedly installed on one end of the spring 14. The limit block 10 extends out of the installation plate 4. The filter screen 13 can prevent debris from entering the interior of the pressure relief pipe 2. The tee pipe 6 and the pressure relief pipe 2 are arranged adjacent to each other.

[0022] Limiting holes 15 are provided on both sides of one end of the pressure relief pipe 2 for the limiting block 10 to pass through.

[0023] The pressure sensor 9 is electrically connected to the controller 7 via a wire, and the controller 7 is electrically connected to an external power supply via a wire.

[0024] The working principle of this utility model is as follows:

[0025] In use, the tee pipe 6 and the pressure relief pipe 2 are welded onto the main pipe body 1 and connected to the main pipe body 1. Air from the pipe enters the air chamber 8. At this time, the air pressure in the air chamber 8 is the same as the air pressure in the main pipe body 1. Air may enter the pressure relief pipe 2. An air pressure sensor 9 is installed in the air chamber 8. The air pressure sensor 9 detects the air pressure in the air chamber 8 and transmits it to the controller 7. When the air pressure is less than one atmosphere, the controller 7 will activate the electric push rod 5. The electric push rod 5 will retract the push rod end, thereby driving the sealing plate 12 to move to... At the position corresponding to the bottom of the filter screen 13, air will enter the pipe body 1 through the gap between the sealing plate 12 and the pressure relief pipe 2, thereby changing the air pressure inside the pipe body 1 and preventing negative pressure in the pipe. The filter screen 13 at the top of the pressure relief pipe 2 prevents debris from entering the pressure relief pipe 2. When the filter screen 13 needs to be replaced, press the two limiting blocks 10 in the direction they are close to each other, so that the limiting blocks 10 are stored inside the mounting groove 16. At this time, the filter screen 13 can be lifted upward to remove the filter screen 13 and the mounting plate 4 together.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure prevention device for wastewater pipelines, comprising a pipeline body (1), characterized in that: A three-way pipe (6) is fixedly installed on one side of the main pipe (1). An air chamber (8) is fixedly installed at one end of the three-way pipe (6). A pressure sensor (9) is fixedly installed inside the air chamber (8). A controller (7) is fixedly installed on the front side of the air chamber (8). The other end of the three-way pipe (6) is connected to the main pipe (1). A pressure relief pipe (2) is fixedly installed on one side of the main pipe (1). The pressure relief pipe (2) is L-shaped. A one-way valve (3) is installed at one end of the pressure relief pipe (2). An electric push rod (5) is fixedly installed on one side of the pressure relief pipe (2). The push rod end of the electric push rod (5) is inserted into the inside of the pressure relief pipe (2) and a sealing plate (12) is fixedly installed. A sealing ring (11) is fixedly installed on the outside of the sealing plate (12). The outside of the sealing ring (11) is in contact with the pressure relief pipe (2). The sealing plate (12) is located inside the other end of the pressure relief pipe (2).

2. The anti-negative pressure device for wastewater pipelines according to claim 1, characterized in that: One end of the three-way pipe (6) is designed to be inclined, and the air chamber (8) is designed to be inclined.

3. The anti-negative pressure device for wastewater pipelines according to claim 1, characterized in that: The pressure relief pipe (2) has an installation plate (4) inside one end. The installation plate (4) has a through hole and a filter screen (13) is fixedly installed inside the through hole. The installation plate (4) has an installation groove (16) on both sides. A spring (14) is fixedly installed on one side inside the installation groove (16). A limit block (10) is fixedly installed on one end of the spring (14) and the limit block (10) passes through the installation plate (4).

4. A negative pressure prevention device for wastewater pipelines according to claim 3, characterized in that: The pressure relief pipe (2) has limiting holes (15) on both sides of one end for the limiting block (10) to pass through.

5. A negative pressure prevention device for wastewater pipelines according to claim 1, characterized in that: The pressure sensor (9) is electrically connected to the controller (7) via a wire, and the controller (7) is electrically connected to an external power supply via a wire.

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