overflow pipe

Abstract

The application discloses an overflow pipe and relates to the technical field of water supply and drainage, which comprises an overflow pipe body, an overflow opening of the overflow pipe body is arranged on a vertically arranged expanding pipe section, a descending pipe section is connected to the lower end of the expanding pipe section, and a liquid outlet pipe section is connected to the bottom end of the descending pipe section; a plurality of overflow openings are arranged on the pipe wall of the upper part of the expanding pipe section, the overflow openings extend to the top end of the expanding pipe section to form open ends, and the opening degrees of the overflow openings increase from bottom to top. The application solves the problem that the existing overflow pipe cannot discharge water in a short time when the water level rises rapidly, thereby causing a large amount of overflow.

Description

Technical Field

[0001] This invention relates to the field of water supply and drainage technology, and in particular to an overflow pipe. Background Technology

[0002] In industrial circulating water systems, overflow pipes are typically connected to the walls of storage containers such as pools. When the liquid level in the container is higher than the overflow pipe opening, the liquid can flow through the overflow pipe to a designated area. Most existing overflow pipes are simply equal-diameter circular pipes with one end connected to the upper outer wall of the container or extending horizontally into the upper part of the container, and the other end connected to a designated area or treatment equipment outside the container. During the use of industrial circulating water, large fluctuations in the pool level can occur during start-up, shutdown, and uneven return water flow. These large fluctuations can cause a sudden rise in water level, and the overflow pipes described above cannot drain the water quickly enough, leading to a large overflow of the pool. This causes damage to surrounding equipment and electrical appliances, and also threatens the lives of nearby employees. Each year, there are as many as six equipment failures and electrical damages caused by overflows, with each loss amounting to approximately 50,000 yuan, totaling 300,000 yuan annually. The cost of these safety hazards is difficult to estimate. Summary of the Invention

[0003] The purpose of this invention is to provide an overflow pipe that can solve the problem of existing overflow pipes where water cannot be discharged in a short time when the water level rises rapidly, resulting in a large amount of overflow.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: the overflow pipe includes an overflow pipe body, the overflow port of the overflow pipe body is provided on a vertically arranged enlarged diameter pipe section, the lower end of the enlarged diameter pipe section is connected to a downcomer pipe section, the bottom end of the downcomer pipe section is connected to an outlet pipe section; a plurality of overflow openings are provided on the pipe wall of the upper part of the enlarged diameter pipe section, the overflow openings extend to the top of the enlarged diameter pipe section to form an open end, and the opening degree of the overflow openings increases from bottom to top.

[0005] In the above-mentioned overflow pipe technical solution, a more specific technical solution may be: the overflow opening is a V-shaped opening, and multiple overflow openings are provided along the peripheral wall of the expanded diameter pipe section, with adjacent overflow openings intersecting at the top of the expanded diameter pipe section to form a sawtooth.

[0006] Furthermore, pressure-reducing holes are respectively provided on the wall of the expanded diameter pipe section between each adjacent overflow opening.

[0007] Furthermore, the pressure relief hole is a vertically oriented elongated hole.

[0008] Furthermore, the overflow opening has multiple pressure-reducing grooves at its opening edge.

[0009] Furthermore, the pressure-reducing groove is a V-shaped groove.

[0010] Furthermore, the outlet pipe section and the downcomer pipe section have the same diameter, and the orifice diameter of the enlarged pipe section is at least 1.8 times that of the downcomer pipe section.

[0011] Furthermore, the opening depth of the overflow opening is 10% of the effective depth of the liquid storage container.

[0012] Furthermore, the opening depth of the overflow opening is 30-40 cm.

[0013] Furthermore, the outlet of the overflow pipe body is lower than the bottom of the outlet container.

[0014] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The overflow port of the overflow pipe body is set on the vertical expansion pipe section, and several overflow openings with increasing opening from bottom to top are opened on the expansion pipe section. Once the liquid level in the storage container is higher than the overflow opening, the liquid begins to increase the flow rate and discharge the overflow water outward through the overflow pipe body. The higher the liquid level, the greater the drainage volume, thereby avoiding damage to equipment and electrical appliances caused by excessive backflow and rapid rise in water level, and also avoiding accidental injury to employees.

[0016] 2. The overflow opening is designed as multiple V-shaped openings along the perimeter of the expanded diameter pipe section, which facilitates the rapid increase of overflow velocity as the water level rises.

[0017] 3. By opening elongated pressure-reducing holes between adjacent overflow openings and opening multiple pressure-reducing grooves at the edges of each overflow opening, the pressure and impact force on the overflow pipe body when a large amount of water overflows may be reduced, thus extending the service life of the overflow pipe.

[0018] 4. The setting of the pipe diameter of the expanded pipe section and the opening depth of the overflow outlet can increase the flow velocity compared with the traditional overflow pipe, and will discharge 50% of the flow area in advance, ensuring a more reasonable increase in the rate of water output. It can play a gradual adjustment role in water level changes, ensuring rapid drainage while not excessively affecting the effective volume of the entire water tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation structure of the overflow pipe and the liquid storage container.

[0020] Figure 2 This is a schematic diagram of the overflow pipe.

[0021] Figure 3 Enlarged structural diagram of the expanded diameter pipe section.

[0022] Explanation of reference numerals in the attached diagram: 1. Liquid storage container; 2. Overflow pipe body; 3. Expanded diameter pipe section; 3-1. Overflow opening; 3-2. Pressure reducing hole; 3-3. Opening edge; 3-4. Pressure reducing groove; 4. Downcomer section; 5. Liquid outlet section; 5-1. First horizontal section; 5-2. Vertical section; 5-3. Second horizontal section. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 and Figure 2 The overflow pipe shown includes an overflow pipe body 2, which has an expanding pipe section 3, a downcomer section 4, and an outlet pipe section 5. The expanding pipe section 3 and the downcomer section 4 are completely located inside the storage container 1. One end of the outlet pipe section 5 enters the storage container 1 from the side wall of the storage container 1, and the other end protrudes outside the storage container 1. In this embodiment, the storage container 1 is a water tank (in other embodiments, the storage container can be a tank, etc.). The downcomer section 4 and the outlet pipe section 5 have the same diameter, and the diameter of the expanding pipe section 3 is at least 1.8 times that of the downcomer section 4. The overflow port of the overflow pipe body 2 is located on the vertically installed expansion pipe section 3. The top of the expansion pipe section 3 is lower than the top of the liquid storage container 1. The lower end of the expansion pipe section 3 is connected to the coaxially installed downcomer section 4. The installation of the downcomer section 4 can increase the potential energy. The lower end of the downcomer section 4 extends to the lower part of the liquid storage container 1, which can increase the drop from the overflow port to the liquid outlet pipe section 5. In this way, the kinetic energy converted from gravitational potential energy will be greater, and the overflow speed of the liquid will be faster. The liquid outlet section 5 has a first horizontal section 5-1, a second horizontal section 5-3, and a vertical section 5-2 connecting the first horizontal section 5-1 and the second horizontal section 5-3. The first horizontal section 5-1 is inserted and fixed to the lower part of the side wall of the liquid storage container 1 and connected to the bottom end of the downcomer section 4. The second horizontal section 5-3 is lower than the bottom end of the liquid storage container 1, so that the liquid outlet of the overflow pipe body 2 is lower than the liquid storage container 1. Thus, when the liquid flows into the overflow pipe body 2 through the overflow outlet, it is a downward flow direction, which can smoothly and quickly discharge from the low-level liquid outlet to the designated area or designated equipment.

[0025] like Figure 2 and Figure 3As shown, the lower part of the expanded diameter pipe section 3 is designed as a conical structure, wider at the top and narrower at the bottom, to facilitate connection to the downcomer section 4. To accelerate drainage from the overflow port during a sudden rise in water level, multiple overflow openings 3-1 are formed on the upper wall of the expanded diameter pipe section 3. These overflow openings 3-1 extend to the top of the expanded diameter pipe section 3, forming an open end, with the opening degree increasing from bottom to top. In this embodiment, the overflow opening 3-1 is a V-shaped opening (in other embodiments, the overflow opening can be a slightly curved opening, etc.). Eight identical overflow openings 3-1 are formed on the circumferential wall of the expanded diameter pipe section 3. Adjacent overflow openings 3-1 intersect at the top of the expanded diameter pipe section 3 to form a toothed tip, resulting in evenly distributed serrations on the upper part of the expanded diameter pipe section 3. The opening depth of the overflow opening 3-1 is 30–40 cm, which is approximately 10% of the effective depth of the storage container. Pressure reducing holes 3-2 are respectively opened on the wall of the expanded diameter pipe section 3 between each adjacent overflow opening 3-1. The pressure reducing holes 3-2 are elongated holes that are vertically arranged in the center on each serrated part. A V-shaped groove or other shaped pressure reducing groove 3-4 is opened on the opening edge 3-3 of the overflow opening 3-1.

[0026] When this overflow pipe is working, it can play a role in early drainage as the water level gradually rises. When the water level rises slowly, the overflow pipe design with multiple V-shaped overflow openings 3-1 can drain water slowly in advance. When the return water volume is too large and the water level rises rapidly, it can also play a role in rapid drainage, without affecting the maximum drainage capacity.

[0027] In the application of this overflow pipe in the clean loop, desalination, and turbid loop water tanks of the steel plant water treatment system, there has never been any overflow from the tank outlet.

Claims

1. An overflow pipe comprising an overflow pipe body, characterised in that: The overflow port of the overflow pipe body is arranged on an upstanding diameter expansion pipe section, the lower end of the diameter expansion pipe section is connected with a downpipe section, the bottom end of the downpipe section is connected with a liquid outlet pipe section; a plurality of overflow openings are arranged on the pipe wall of the upper part of the diameter expansion pipe section, the overflow openings extend to the top end of the diameter expansion pipe section to form open ends, and the opening degrees of the overflow openings increase from bottom to top.

2. The overflow tube of claim 1, wherein: The overflow openings are V-shaped openings, a plurality of overflow openings are arranged along the peripheral wall of the diameter expansion pipe section, and adjacent overflow openings intersect at the top end of the diameter expansion pipe section to form a sawtooth shape.

3. The overflow tube of claim 2, wherein: A pressure reduction hole is arranged on the wall of the diameter expansion pipe section between each adjacent overflow opening.

4. The overflow tube of claim 3, wherein: The pressure reduction hole is a vertically arranged long slot.

5. The overflow tube of claim 4, wherein: A plurality of pressure reduction grooves are arranged on the opening edge of the overflow opening.

6. The overflow tube of claim 5, wherein: The pressure reduction grooves are V-shaped grooves.

7. Overflow pipe according to any one of claims 1 to 6, characterized in that: The pipe diameter of the liquid outlet pipe section and the downpipe section is the same, and the hole diameter of the diameter expansion pipe section is at least 1.8 times that of the downpipe section.

8. The overflow tube of claim 7, wherein: The opening depth of the overflow opening is 10% of the effective depth of the liquid storage container.

9. The overflow tube of claim 8, wherein: The opening depth of the overflow opening is 30-40 cm.

10. The overflow tube of claim 8, wherein: The liquid outlet of the overflow pipe body is lower than the bottom end of the liquid storage container.

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