CN216383065U

CN216383065U - Bypass structure of overhead drain pipe

Info

Publication number: CN216383065U
Application number: CN202121991167.0U
Authority: CN
Inventors: 李匡彝; 顾奇; 潘烨敏; 胡赟燕
Original assignee: Zhejiang Hengyang Thermal Power Co ltd
Current assignee: Zhejiang Hengyang Thermal Power Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-04-26
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses an overhead drain pipe bypass structure, which comprises a high-pressure heater, a drain flash tank, a first pipeline, a second pipeline and a buffer device, wherein the first pipeline is a straight pipe, the second pipeline is a three-way pipe, one end of the first pipeline is connected with the high-pressure heater, the other end of the first pipeline is connected with a first pipe orifice of the second pipeline, a second pipe orifice of the second pipeline is connected with the drain flash tank, and a third pipe orifice of the second pipeline is connected with the buffer device.

Description

Bypass structure of overhead drain pipe

Technical Field

The utility model relates to the technical field of drainage systems, in particular to an overhead drainage pipe bypass structure.

Background

The high-pressure heater is an important auxiliary device in a power station and is an important part of a regenerative cycle. It utilizes the steam extraction of high pressure cylinder to heat the feedwater, makes some steam heat that has done certain merit totally retrieve to reduce the steam extraction loss, improve the power station thermal cycle efficiency, on the other hand improves the feedwater temperature that gets into steam generator, reduces the inside and outside difference in temperature of evaporimeter heat-transfer pipe, is favorable to reducing the thermal stress of heat-transfer pipe. Meanwhile, when the temperature in the high-pressure heater is lower than the saturation temperature corresponding to the steam pressure, water is condensed, and if the water is not discharged in time, the water is accumulated in certain pipelines and cylinders, so that the system is damaged. The high pressure heater drain system is responsible for draining this water.

The connecting corners of the high-pressure heater and the drainage flash tank in the existing high-pressure heater drainage system are directly connected through the elbow pipe, certain pressure exists during drainage, the flow rate is high, the inner wall of the elbow pipe is directly washed at high speed, so that the abrasion is serious, the inner wall of the elbow pipe is easy to wear after thinning, certain economic loss is caused, the system operation is influenced, and therefore, an overhead drainage pipe bypass structure is necessary to be designed to solve the technical problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model relates to an overhead drain pipe bypass structure which is simple and reliable, effectively solves the technical problems and is suitable for popularization and application, and in order to achieve the purposes, the utility model is realized by the following technical scheme:

the utility model provides an overhead drain pipe bypass structure, includes high pressure feed water heater, hydrophobic flash tank, first pipeline, second pipeline, buffer, first pipeline is the straight tube, the second pipeline is the three-way pipe, the one end of first pipeline is connected with high pressure feed water heater, the other end of first pipeline is connected with the first mouth of pipe of second pipeline, the second mouth of pipe of second pipeline is connected with hydrophobic flash tank, the third mouth of pipe of second pipeline is connected with buffer.

On the basis of the above scheme and as a preferable scheme of the scheme: the buffer device comprises a buffer tube, a buffer block and an elastic element, wherein the bottom end of the buffer tube is of a closed structure, the open end of the buffer tube is connected with the third tube opening of the second pipeline, the buffer block is located in the buffer tube, and the buffer block is connected with the bottom end of the buffer tube through the elastic element.

On the basis of the above scheme and as a preferable scheme of the scheme: the buffer block is provided with an annular groove, a sealing ring is embedded in the annular groove, and the sealing ring is in contact with the inner wall of the buffer tube.

On the basis of the above scheme and as a preferable scheme of the scheme: the surface of one side of the buffer block facing the second pipeline is a spherical concave surface.

On the basis of the above scheme and as a preferable scheme of the scheme: the outer wall of a third pipe orifice of the second pipeline is provided with an external thread, the inner wall of the opening end of the buffer pipe is provided with an internal thread matched with the external thread, and the buffer pipe is connected with the second pipeline in a threaded connection mode.

On the basis of the above scheme and as a preferable scheme of the scheme: and a grab handle is arranged on one side of the buffer tube far away from the second pipeline.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that: hydrophobic rivers can strike the third mouth of pipe that the flow direction set up relatively with first mouth of pipe earlier before flowing to the second mouth of pipe by the first mouth of pipe of second pipeline, rivers can direct impact on the buffer block at first, because elastic element's existence buffer block removes elastic element and receives the compression, elastic element plays certain buffering effect, when follow-up rivers continue to strike, there have been water to exist in the buffer pipe, these water itself play and stop the effect, can resist hydrophobic rivers' impact and the interfusion converges, buffering effect is good, make the operating life of pipeline increase greatly, the reliability of system is promoted, and the maintenance cost is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of a prior art connection structure.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, however, the specific embodiments and embodiments described below are only for illustrative purposes and are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the directions or positional relationships shown in fig. 1, are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

As shown in fig. 2, in the drainage system of the existing high pressure heater 1, the connection corner of the high pressure heater 1 and the drainage flash tank 2 is directly connected through the elbow pipe 6, because the drainage water flow has a certain pressure and a fast flow rate, the inner wall of the elbow pipe 6 is directly washed at a high speed, which causes serious abrasion, and the inner wall of the elbow pipe 6 is easy to wear through after being thinned, in order to solve the above problems, as shown in fig. 1, the utility model relates to an elevated drainage pipe bypass structure, which comprises a high pressure heater 1, a drainage flash tank 2, a first pipeline 3, a second pipeline 4 and a buffer device 5, wherein the first pipeline 3 is a straight pipe, the second pipeline 4 is a three-way pipe, one end of the first pipeline 3 is connected with the high pressure heater 1, the other end of the first pipeline 3 is connected with a first pipe orifice 41 of the second pipeline 4, a second pipe orifice 42 of the second pipeline 4 is connected with the drainage flash tank 2, the third pipe orifice 43 of the second pipe 4 is connected with the buffer device 5, when the drainage system operates, the drainage water flows out from one end of the high-pressure heater 1, flows into the drainage flash tank 2 after flowing through the first pipe 3 and the second pipe 4, and then flows to the drainage flash tank 2 after impacting the buffer device 5 in the process of flowing through, specifically, the buffer device 5 comprises a buffer pipe 51, a buffer block 52 and an elastic element 53, the bottom end of the buffer pipe 51 is of a closed structure, the whole length of the buffer pipe 51 is 20-30cm, the open end of the buffer pipe 51 is connected with the third pipe orifice 43 of the second pipe 4, the shape of the buffer block 52 is circular and matched with the cross-sectional shape of the buffer pipe 51, the peripheral surface of the buffer block 52 is smooth, the buffer block 52 can reciprocate in the buffer pipe 51, and the buffer block 52 is connected with the bottom end of the buffer pipe 51 through the elastic element 53, the elastic element 53 is preferably a spring, the hydrophobic water flow can impact the third nozzle 43 opposite to the first nozzle 41 before flowing from the first nozzle 41 to the second nozzle 42 of the second pipeline 4, the water flow can directly impact on the buffer block 52 at first, the buffer block 52 moves the elastic element 53 to be compressed due to the existence of the elastic element 53, the elastic element 53 has a certain buffering effect, when the subsequent water flow continuously impacts, water exists in the buffer block 51, the water itself has a blocking effect, the impact of the hydrophobic water flow can be resisted and the hydrophobic water flow is mutually fused and converged, the buffering effect is good, the service life of the pipeline is greatly prolonged, the reliability of the system is improved, and the maintenance cost is reduced.

In this embodiment, it is further preferable that an annular groove is formed on the buffer block 52, a sealing ring 54 is embedded in the annular groove, the sealing ring 54 contacts with the inner wall of the buffer tube 51, and the sealing ring 54 plays a role in water blocking and water stopping.

It is further preferred in this embodiment that one side surface of the buffer block 52 facing the second pipeline 4 is a spherical concave surface 55, and the structure of the spherical concave surface 55 can improve the shock resistance of the buffer block 52, avoid the surface damage of the buffer block 52 caused by the water flow impact, and improve the service life of the buffer block 52.

It is further preferred in this embodiment that an external thread is provided on the outer wall of the third pipe orifice 43 of the second pipe 4, an internal thread matched with the external thread is provided on the inner wall of the opening end of the buffer tube 51, the buffer tube 51 is connected to the second pipe 4 in a threaded connection manner, the buffer tube 51 is convenient to disassemble and assemble in the threaded connection manner, and the disassembly and assembly can be rapidly completed, so that the buffer device 5 can be rapidly replaced or repaired when used in a failure, and maintenance is facilitated.

It is further preferred in this embodiment that a handle 56 is provided on a side of the buffer tube 51 away from the second conduit 4, and the handle 56 is convenient for a worker to hold and apply force to rotate the buffer tube 51 for disassembly and assembly.

It should be noted that the technical features of the sealing ring, the threaded connection, the elastic element, etc. related to the present patent application should be regarded as the prior art, and the specific structure, the operation principle, and the control manner and the spatial arrangement manner that may be related to the technical features should be selected conventionally in the field, and should not be regarded as the utility model point of the present patent, and the present patent is not further specifically described in detail.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes in structure, shape and principle of the utility model should be covered by the protection scope of the utility model.

Claims

1. The utility model provides an overhead drain pipe bypass structure which characterized in that: the water drain device comprises a high-pressure heater, a water drain flash tank, a first pipeline, a second pipeline and a buffer device, wherein the first pipeline is a straight pipe, the second pipeline is a three-way pipe, one end of the first pipeline is connected with the high-pressure heater, the other end of the first pipeline is connected with a first pipe orifice of the second pipeline, a second pipe orifice of the second pipeline is connected with the water drain flash tank, and a third pipe orifice of the second pipeline is connected with the buffer device.

2. The overhead hydrophobic pipe bypass structure of claim 1, wherein: the buffer device comprises a buffer tube, a buffer block and an elastic element, wherein the bottom end of the buffer tube is of a closed structure, the open end of the buffer tube is connected with the third tube opening of the second pipeline, the buffer block is located in the buffer tube, and the buffer block is connected with the bottom end of the buffer tube through the elastic element.

3. The overhead hydrophobic pipe bypass structure of claim 2, wherein: the buffer block is provided with an annular groove, a sealing ring is embedded in the annular groove, and the sealing ring is in contact with the inner wall of the buffer tube.

4. The overhead hydrophobic pipe bypass structure of claim 3, wherein: the surface of one side of the buffer block facing the second pipeline is a spherical concave surface.

5. The overhead hydrophobic pipe bypass structure of claim 4, wherein: the outer wall of a third pipe orifice of the second pipeline is provided with an external thread, the inner wall of the opening end of the buffer pipe is provided with an internal thread matched with the external thread, and the buffer pipe is connected with the second pipeline in a threaded connection mode.

6. The overhead hydrophobic pipe bypass structure of claim 5, wherein: and a grab handle is arranged on one side of the buffer tube far away from the second pipeline.