Protective structure for washing water pump mechanical seal

Abstract

The utility model relates to the technical field of mechanical seal washing, in particular to a protective structure for washing a water pump mechanical seal, which comprises a first washing branch pipe and a second washing branch pipe which are connected in parallel. A first control valve, a first Y-shaped hand-cranking brush type filter and a second control valve are sequentially mounted on the first flushing branch pipe; a third control valve, a second Y-shaped hand-cranking brush type filter and a fifth control valve are sequentially mounted on the second flushing branch pipe; a first blow-off pipe is arranged between the first control valve and the first Y-shaped hand-cranking brush type filter, and a third control valve is mounted on the first blow-off pipe; a second blow-off pipe is arranged between the fourth control valve and the second Y-shaped hand-cranking brush type filter, and a sixth control valve is mounted on the second blow-off pipe. According to the utility model, on one hand, mechanical seal washing water can be filtered, so that mechanical seal damage caused by impurities is avoided, on the other hand, the filter can be backwashed, manual disassembly and cleaning are avoided, and the use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of machine seal flushing, in particular to a protective structure for flushing a water pump machine seal. Background Art

[0002] Mechanical seals will generate high temperatures during high-speed operation. During operation, it is necessary to flush the sealing chamber with liquid to take away the heat, thereby controlling the continuous rise in temperature and ensuring the continuous and stable operation of the pump body.

[0003] For relay pump stations in the long-distance thermal transmission pipeline system, the mechanical seal of the water pump needs to be flushed and cooled during the long-term continuous operation of the water pump. For the selection of flushing water, the existing one is generally hot water for heating collected from the water outlet of the pump body. This water has many impurities. During the process of flushing the mechanical seal, impurities often enter the sealing cavity, causing damage to the mechanical seal, resulting in leakage. At this time, the machine needs to be shut down and a new mechanical seal needs to be replaced. On the one hand, it increases the maintenance cost, and on the other hand, it also poses a great safety hazard, becoming a major unsafe factor for the stable operation of heating.

[0004] Therefore, a protective structure capable of filtering mechanical seal flushing water is a problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a protective structure for flushing a water pump seal in view of the above-mentioned deficiencies in the prior art, so as to achieve the purpose of filtering the seal flushing water and backwashing the filter.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a protective structure for flushing a water pump seal, comprising a first flushing water inlet pipe, the first flushing water inlet pipe is respectively connected to a first flushing branch pipe and a second flushing branch pipe, the first flushing branch pipe is connected in parallel with the second flushing branch pipe, the water outlet ends of the first flushing branch pipe and the second flushing branch pipe are respectively connected to the second flushing water inlet pipe, the second flushing water inlet pipe is connected to the sealing chamber of the pump body, the first flushing branch pipe is sequentially installed with a first control valve, a first Y-type hand-cranked brush filter and a second control valve; the second flushing branch pipe is sequentially installed with a third control valve, a second Y-type hand-cranked brush filter and a fifth control valve; a first sewage pipe is arranged between the first control valve and the first Y-type hand-cranked brush filter, the first sewage pipe is connected to the first flushing branch pipe, and the third control valve is installed on the first sewage pipe; a second sewage pipe is arranged between the fourth control valve and the second Y-type hand-cranked brush filter, the second sewage pipe is connected to the second flushing branch pipe, and the sixth control valve is installed on the second sewage pipe.

[0007] Furthermore, a mass flow meter is installed on the second flushing water inlet pipe.

[0008] Furthermore, the first flushing water inlet pipe is connected to the water outlet end of the pump body, the second flushing water inlet pipe is connected to the sealed cavity of the pump body, the sealed cavity of the pump body is connected to the flushing water outlet pipe, and the flushing water outlet pipe is connected to the water inlet end of the pump body.

[0009] Furthermore, the first sewage pipe and the second sewage pipe are respectively connected to the sewage main pipe.

[0010] Furthermore, a cooling tower is installed on the first flushing water inlet pipe, a cold medium channel is provided in the cooling tower, and the cold medium channel is arranged in countercurrent with the first flushing water inlet pipe.

[0011] The beneficial effects of the utility model are as follows: when the utility model is in use, on the one hand, it can filter the mechanical seal flushing water, thereby avoiding mechanical seal damage caused by impurities; on the other hand, it can also backwash the filter, avoiding manual disassembly and cleaning, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structural connection of the utility model;

[0013] Figure 2 This is a schematic diagram of the sewage pipe connection of the utility model;

[0014] Figure 3 It is a schematic diagram of the pipeline arrangement of the cooling tower of the utility model.

[0015] The names corresponding to the marks in the figure are:

[0016] 1. First flushing water inlet pipe; 2. First flushing branch pipe; 21. First control valve; 22. First Y-type hand-cranked brush filter; 23. Second control valve; 24. First sewage pipe; 241. Third control valve; 3. Second flushing branch pipe; 31. Fourth control valve; 32. Second Y-type hand-cranked brush filter; 33. Fifth control valve; 34. Second sewage pipe; 341. Sixth control valve; 4. Second flushing water inlet pipe; 41. Mass flow meter; 5. Sewage main pipe; 6. Cooling tower; 7. Cold medium channel. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0018] Embodiments of the present utility model:

[0019] like Figure 1-2As shown, in the embodiment, a first flushing water inlet pipe 1 is provided, and the first flushing water inlet pipe 1 is respectively connected to the first flushing branch pipe 2 and the second flushing branch pipe 3, and a first control valve 21, a first Y-type hand-cranked brush filter 22 and a second control valve 23 are sequentially installed on the first flushing branch pipe 2, and a first sewage pipe 24 is provided between the first control valve 21 and the first Y-type hand-cranked brush filter 22, and the first sewage pipe 24 is connected to the first flushing branch pipe 2, and a third control valve 241 is installed on the first sewage pipe 24.

[0020] A fourth control valve 31, a second Y-type hand-cranked brush filter 32 and a fifth control valve 33 are sequentially installed on the second flushing branch pipe 3, a second sewage pipe 34 is arranged between the fourth control valve 31 and the second Y-type hand-cranked brush filter 32, the second sewage pipe 34 is connected to the second flushing branch pipe 3, and a sixth control valve 341 is installed on the second sewage pipe 34.

[0021] The outlet ends of the first flushing branch pipe 2 and the second flushing branch pipe 3 are respectively connected to the second flushing water inlet pipe 4, on which a mass flow meter 41 is installed. The second flushing water inlet pipe 4 is connected to the flushing water outlet pipe after mechanical sealing, and the flushing water outlet pipe is connected to the pump chamber to realize the closed-loop flow of flushing water; the first sewage pipe 24 and the second sewage pipe 34 are respectively connected to the sewage main pipe 5.

[0022] A cooling tower 6 is installed on the first flushing water inlet pipe 1. A cold medium channel 7 is provided in the cooling tower 6. The cold medium channel 7 is arranged in countercurrent with the first flushing water inlet pipe 1. In this embodiment, the cold medium is dry air.

[0023] The principle of this utility model is:

[0024] When the utility model is in use, on the one hand, it can filter the mechanical seal flushing water, thereby avoiding mechanical seal damage caused by impurities; on the other hand, it can also backwash the filter to avoid manual disassembly and cleaning, making it more convenient to use.

[0025] When filtering the mechanical seal flushing water, the first flushing branch pipe 2 and the second flushing branch pipe 3 are one main and one auxiliary, and only one is working at the same time. When backwashing, the working one is closed and the other standby one starts working to ensure continuous water inflow to the mechanical seal.

[0026] Taking the first flushing branch 2 working and the second flushing branch 3 on standby as an example, when the utility model works normally, flushing water (flushing water is generally process water, collected at the water outlet of the water pump) enters the first flushing branch 2 from the first flushing water inlet pipe 1, and is filtered by the first Y-shaped hand-cranked brush filter 22 in the first flushing branch 2. At this time, clean flushing water is obtained, and the clean flushing water enters the sealing cavity of the pump body through the second flushing water inlet pipe 4 to cool the mechanical seal, and then is discharged from the drain port of the sealing cavity and flows into the pump cavity to realize the closed-loop flow of the flushing water; in this process, in order to ensure the flushing and cooling effect, a cooling tower 6 is often installed on the first flushing water inlet pipe 1 (the cooling tower 6 is existing and will not be repeated), and the flushing water is cooled by heat exchange with cooling water, thereby ensuring the flushing effect of the mechanical seal.

[0027] When it is observed that the reading of the mass flow meter 41 is significantly reduced and cannot meet the flushing of the pump body mechanical seal, it is necessary to backwash the first Y-type hand-cranked brush filter 22 in the first flushing branch pipe 2. At this time, it should be noted that the fourth control valve 31 and the fifth control valve 33 on the second flushing branch pipe 3 are first opened, and then the first control valve 21 on the first flushing branch pipe 2 is closed, and the second control valve 23 is kept in an open state, and the third control valve 241 is opened at the same time, so that the flushing water in the first flushing water inlet pipe 1 is cooled through a part of the mechanical seal of the second flushing branch pipe 3, and the other part is used to backwash the first hand-cranked brush filter. During the process, the hand-cranked brush is shaken to clean the filter screen in the first Y-type hand-cranked brush filter 22, and the cleaned sewage is discharged through the first sewage pipe 24. After cleaning, the second control valve 23 and the third control valve 241 can be closed. When the reading of the mass flow meter 41 decreases again to a point that it cannot meet the flushing needs, the above operation is repeated to backwash the second Y-type hand-cranked brush filter 32.

[0028] It should be noted that the utility model adopts heating hot water for heat exchange and cooling to flush the machine pump. The reason why cooling water is not used for direct flushing in the process is that the external water supply is easy to freeze in the cold winter, and the stable supply of cooling water cannot be guaranteed. Therefore, the method of using heating hot water for heat exchange can ensure the stable supply of flushing water, and then ensure the stable use of the machine seal; at the same time, the Y-type hand-cranked brush filter is involved in the above process of the utility model. The Y-type hand-cranked brush filter has the function of backwashing. Since it is an existing mature equipment and technology, its principle will not be elaborated.

Claims

1. A protective structure for flushing a water pump seal, comprising a first flushing water inlet pipe (1), the first flushing water inlet pipe (1) being connected to a first flushing branch pipe (2) and a second flushing branch pipe (3), the first flushing branch pipe (2) and the second flushing branch pipe (3) being connected in parallel, the water outlet ends of the first flushing branch pipe (2) and the second flushing branch pipe (3) being connected to a second flushing water inlet pipe (4), the second flushing water inlet pipe (4) being connected to a sealing cavity of a pump body, characterized in that: The first flushing branch pipe (2) is provided with a first control valve (21), a first Y-shaped hand-cranked brush filter (22) and a second control valve (23) in sequence; the second flushing branch pipe (3) is provided with a third control valve (241), a second Y-shaped hand-cranked brush filter (32) and a fifth control valve (33) in sequence; a first sewage discharge pipe (24) is provided between the first control valve (21) and the first Y-shaped hand-cranked brush filter (22); the first sewage discharge pipe (24) is connected to the first flushing branch pipe (2), and the third control valve (241) is installed on the first sewage discharge pipe (24); a second sewage discharge pipe (34) is provided between the fourth control valve (31) and the second Y-shaped hand-cranked brush filter (32); the second sewage discharge pipe (34) is connected to the second flushing branch pipe (3), and a sixth control valve (341) is installed on the second sewage discharge pipe (34).

2. A protective structure for flushing a water pump seal according to claim 1, characterized in that: A mass flow meter (41) is installed on the second flushing water inlet pipe (4).

3. A protective structure for flushing a water pump seal according to claim 1, characterized in that: The first flushing water inlet pipe (1) is connected to the water outlet end of the pump body, the second flushing water inlet pipe (4) is connected to the sealed cavity of the pump body, the sealed cavity of the pump body is connected to the flushing water outlet pipe, and the flushing water outlet pipe is connected to the water inlet end of the pump body.

4. A protective structure for flushing a water pump seal according to claim 3, characterized in that: The first sewage pipe (24) and the second sewage pipe (34) are respectively connected to the sewage main pipe (5).

5. A protective structure for flushing a water pump seal according to claim 3, characterized in that: A cooling tower (6) is installed on the first flushing water inlet pipe (1), a cold medium channel (7) is arranged in the cooling tower (6), and the cold medium channel (7) is arranged in countercurrent with the first flushing water inlet pipe (1).

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