CN213684658U

CN213684658U - Mechanical seal flushing system combining PLAN11 scheme and PLAN32 scheme

Info

Publication number: CN213684658U
Application number: CN202022210442.2U
Authority: CN
Inventors: 宋黎明; 谷峰; 王泽平; 彭敏
Original assignee: Sinopec Engineering Group Co Ltd; Sinopec Shanghai Engineering Co Ltd
Current assignee: Sinopec Engineering Group Co Ltd; Sinopec Shanghai Engineering Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-13
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a mechanical seal flushing system combining a PLAN11 scheme and a PLAN32 scheme, which comprises a PLAN11 self-flushing pipeline connecting an outlet of a pump and a sealing cavity, and a PLAN32 external flushing pipeline connected with an inlet of external flushing liquid; a three-way valve is provided where the PLAN11 self-flush line meets the PLAN32 external flush line. The utility model effectively integrates two flushing schemes of PLAN11 and PLAN32 into one, thereby realizing reasonable control according to different working conditions, ensuring normal work of mechanical seal and effectively saving energy consumption; the applicability of the mechanical sealing system to the working condition is enhanced, and the service life of the whole mechanical sealing system can be prolonged.

Description

Mechanical seal flushing system combining PLAN11 scheme and PLAN32 scheme

Technical Field

The utility model relates to a mechanical seal field especially relates to a mechanical seal rinse-system of PLAN11 scheme and PLAN32 scheme combination.

Background

The existing seal flushing schemes PLAN11 and PLAN32 are 2 independent seal flushing schemes, the scheme configurations are shown in figures 2 and 3, and for any one scheme, the scheme has respective characteristics in respective application.

And because the working states of pump sets in some petrochemical fields are different, different schemes are required to be adopted for washing. For example, a horizontal centrifugal pump, when the pumping medium is characterized by easy crystallization, coking or containing a small amount of solid particles, etc., the PLAN of PLAN11 flushing is generally selected, i.e. the pumping medium is led from the outlet of the pump to flush the mechanical seal cavity. When the pump is stopped, the pumping medium does not flow, the PLAN11 flushing scheme cannot normally operate, and at this time, in order to prevent the temperature change of the medium in the mechanical sealing cavity caused by the non-flow from causing crystallization and coking phenomena or the phenomena of sedimentation and accumulation of solid particles in the medium and the like, the PLAN32 flushing scheme needs to be adopted, and the flushing liquid is introduced from the outside to flush the mechanical sealing part, so that the mechanical sealing part cannot be influenced.

In addition, in the operating condition of the pump in the field of petrochemical industry, the condition that the pumping medium changes sometimes exists, namely, the medium is easy to crystallize in the initial stage of operation or the content of solid particles is high; at this point, a PLAN32 washing protocol is selected as appropriate. When the pump is operated for a period of time, the medium property tends to be stable or the solid content is greatly reduced, at the moment, the medium is more suitable to be used as the flushing liquid, the consumption of the external flushing liquid can be reduced, the economic operation is facilitated, and the flushing scheme needs to be changed into PLAN11 to be more suitable.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art, and provides a mechanical seal flushing system combining the PLAN11 scheme and the PLAN32 scheme.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

providing a mechanical seal flushing system combining the PLAN11 scheme and the PLAN32 scheme, comprising a PLAN11 self-flushing line connecting a pump outlet and a seal cavity, and a PLAN32 external flushing line connected with an external flushing liquid inlet; a three-way valve is provided where the PLAN11 self-flush line meets the PLAN32 external flush line.

Furthermore, a regulating valve is arranged on the PLAN32 external flushing pipeline.

Further preferably, a pressure gauge is further arranged on the PLAN32 outer flushing pipeline and downstream of the regulating valve.

Further preferably, a flow meter may be disposed on the PLAN32 external flushing line upstream of the regulating valve.

Further preferably, a thermometer may be disposed on the PLAN32 external flushing line downstream of the regulating valve.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model effectively integrates two flushing schemes of PLAN11 and PLAN32 into one, thereby realizing reasonable control according to different working conditions, ensuring normal work of mechanical seal and effectively saving energy consumption; the applicability of the mechanical sealing system to the working condition is enhanced, and the service life of the whole mechanical sealing system can be prolonged.

Drawings

FIG. 1 is a schematic view of a mechanical seal flushing system of the present invention;

fig. 2 is a schematic diagram of a conventional PLAN11 system;

fig. 3 is a schematic diagram of a conventional PLAN32 system.

Detailed Description

The present invention will be described in detail and specifically with reference to specific embodiments so as to provide a better understanding of the present invention, but the following embodiments do not limit the scope of the present invention.

Examples

The embodiment provides a mechanical seal flushing system combining the PLAN PLAN11 and the PLAN PLAN32, which comprises a PLAN11 self-flushing pipeline 1 connecting a pump outlet and a seal cavity, and a PLAN32 external flushing pipeline 2 connected with an external flushing liquid inlet; a three-way valve 3 is provided where the aforementioned PLAN11 self-flush line meets the aforementioned PLAN32 external flush line.

As a preferable example, a regulating valve is arranged on the outer flushing pipeline of the PLAN32, and a pressure gauge is also arranged on the outer flushing pipeline of the PLAN32 and at the downstream of the regulating valve.

As a preferred example, a flow meter can be arranged on the external flushing pipeline of the PLAN32 and upstream of the regulating valve; a thermometer may be placed on the external flush line of PLAN32, downstream of the regulator valve.

Application example 1

When the pump is in a long-term shutdown standby state, the three-way valve is rotated to a state that the PLAN11 is closed and the PLAN32 is opened, and when the pump normally runs, the on-off state of the three-way valve is switched, the PLAN32 is closed and the PLAN11 is opened, so that the pump can be ensured to be sealed in the standby state and can be in a good working environment when the pump is normally opened.

Application example 2

When the pump is in the initial operation stage, the three-way valve is rotated to PLAN32, PLAN11 is closed, and the pump is in a state of flushing by external liquid; when the pumped medium tends to stabilize after a period of operation, the three-way valve is rotated to PLAN11, PLAN32 is closed, and the pump is self-flushing.

The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope and the embodiments of the present invention, and those skilled in the art should be able to realize that all the equivalent alternatives and obvious variations made by the present invention and the attached drawings are included in the scope of the present invention.

Claims

1. A mechanical seal flushing system combining the PLAN of PLAN11 and the PLAN of PLAN32, which is characterized by comprising a PLAN11 self-flushing line connecting a pump outlet and a seal cavity, and a PLAN32 external flushing line connected with an external flushing liquid inlet; a three-way valve is provided where the PLAN11 self-flush line meets the PLAN32 external flush line.

2. The mechanical seal flushing system of claim 1, wherein said PLAN32 external flushing line has a regulator valve thereon.

3. The mechanical seal flushing system of claim 2, wherein a pressure gauge is further disposed on the PLAN32 external flushing line downstream of the regulating valve.

4. The mechanical seal flushing system of claim 2, wherein a flow meter may be disposed on the PLAN32 external flushing line upstream of the regulating valve.

5. The mechanical seal flushing system of claim 3, wherein a thermometer may be disposed on the PLAN32 external flushing line downstream of the regulator valve.