Water supply system for main pump filler lubrication

Abstract

The utility model provides a water supply system for main pump filler lubrication, which comprises a first water supply pipeline and a second water supply pipeline, the first water supply pipeline is used for conveying tap water into a filler culvert of a main pump, and the second water supply pipeline is used for conveying forebay water from a forebay of a pump station to the filler culvert. The use priority of the forebay water is higher than that of the tap water, and the tap water is replaced by the water source of the forebay, so that the use amount of the tap water is greatly reduced, and the cost is reduced. Meanwhile, as the forebay water is in a normally open state, the main pump filler is always in an infiltrated state, the waiting time when the main pump is started is shortened, the pump starting response speed is increased, in addition, as the main pump filler is always in the infiltrated state, the abrasion to the main pump filler during starting is greatly reduced, and the replacement period of the filler is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump group cooling technical field especially relates to a water supply system for main pump packing lubrication. BACKGROUND

[0002] In the sewage treatment plant, the main pump is one of the key equipment, which is used to transport sewage from the collection system to the treatment unit. These main pumps usually have a large design flow and lift to ensure the operation efficiency and capacity of the sewage treatment plant. Before the main pump is started, cooling water needs to be injected into the packing to fully wet the packing. Specifically, tap water is pumped into the main pump packing through the cooling water pipeline by the booster pump for lubrication and cooling of the main pump packing, and then discharged to the bottom of the main pump. The whole lubrication and cooling process takes about 200 seconds, which is a long time, affecting the start-up time of the main pump. Especially during the flood season or equipment maintenance period, if the upstream water volume suddenly increases and additional pumps are needed, the response time of the main pump start-up is long, which has a certain impact on maintaining the stability of the front pool level.

[0003] At the same time, the use of tap water for lubrication and cooling of the main pump packing requires a large amount of tap water, which consumes a lot of water. In addition, due to the long service life of the equipment, the mechanical clearance at the bottom of the main pump is large, the seal is aging, and the cooling water leakage is serious, which further increases the amount of tap water.

[0004] Therefore, it is necessary to improve the existing cooling system to shorten the start-up time of the main pump and reduce the amount of tap water. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present utility model is to provide a water supply system to solve the problem of large amount of tap water and long start-up time of the main pump in the prior art.

[0006] To achieve the above-mentioned purposes and other related purposes, the utility model provides a water supply system for lubricating the packing of a main pump, which comprises:

[0007] A first water supply pipeline is used to deliver tap water to the packing of the main pump. The first water supply pipeline comprises a first main pipeline and a plurality of first branch pipelines. One end of the first branch pipeline is connected to the first main pipeline, and the other end of the first branch pipeline is connected to the packing of the main pump.

[0008] A second water supply pipeline comprises a second main pipeline and a plurality of second branch pipelines. One end of the second branch pipeline is connected to the second main pipeline, and the other end of the second branch pipeline is connected to the first branch pipeline through a tee joint. The second main pipeline is used to deliver front pool water from the front pool of the pump station to the second branch pipeline, so that both tap water and front pool water can be used to lubricate and cool the packing in the packing of the main pump. The use priority of the front pool water is higher than that of the tap water.

[0009] Optionally, the first sub-pipe is provided with a first valve at a section between the tee joint and the first main pipe; and the second sub-pipe is provided with a second valve at a section between the tee joint and the second main pipe.

[0010] Optionally, the first valve is in a normally open state to keep the main pump packing in a wet state.

[0011] Optionally, the first valve is a one-way valve.

[0012] Optionally, the water supply system further comprises a third water supply pipe for delivering tap water to the packing can of the main pump through an independent pipe; the third water supply pipe comprises a third main pipe and a plurality of third sub-pipes, one end of each third sub-pipe being connected to the third main pipe, and the other end of each third sub-pipe being connected to the packing can of the main pump.

[0013] Optionally, the main pump is located in a pump house, and a plurality of main pumps are arranged in the pump house.

[0014] Optionally, a protective cage is arranged around the main pump, and the first water supply pipe and the second water supply pipe are arranged along a steel frame structure, and the first sub-pipe and the second sub-pipe pass through the protective cage and are connected to the main pump.

[0015] As described above, the utility model provides a water supply system for main pump packing lubrication, the water supply system comprises a first water supply pipe and a second water supply pipe, the first water supply pipe is used for delivering tap water to the packing can of the main pump, and the second water supply pipe is used for delivering pre-pool water from a pre-pool of a pump station to the packing can, so that the tap water and the pre-pool water can both lubricate and cool the packing in the packing can of the main pump, the use priority of the pre-pool water is higher than that of the tap water, and the water source of the pre-pool is used to replace the tap water, thereby greatly reducing the amount of tap water and reducing the cost. At the same time, the pre-pool water is in a normally open state, so that the main pump packing is always in a wet state, thereby reducing the waiting time when the main pump is started, improving the pump starting response speed, and further, because the main pump packing is always in a wet state, the wear of the main pump packing during starting is greatly reduced, and the packing replacement cycle is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 shows a water supply system schematic diagram according to an embodiment of the utility model.

[0017] Figure 2 Fig. 2 shows a water supply pipe and main pump connection schematic diagram according to an embodiment of the utility model.

[0018] ELEMENT REFERENCE

[0019] 100 main pump

[0020] 11 first main pipe

[0021] 12 first sub-pipe

[0022] 21 second main-pipe

[0023] 22 second sub-pipe

[0024] 31 third main-pipe

[0025] 32 third sub-pipe

[0026] 120 first valve

[0027] 220 second valve DETAILED DESCRIPTION

[0028] The above embodiments of the present application are merely intended for describing and illustrating rather than limiting the present application. It is believed that those skilled in the art can make other variants and modifications of the present application on the basis of the contents of the present application without departing from the spirit of the present application. The generic principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Accordingly, the present application shall not be limited thereto.

[0029] As described in the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general scale for the convenience of description, and the schematic view is only an example, which should not limit the scope of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0030] For the convenience of description, spatial relationship words such as "under", "below", "lower", "underneath", "above", "upper" and the like can be used to describe the relationship between one element or feature and other elements or features shown in the drawings. It will be understood that these spatial relationship words are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as "between" two layers, it can be the only layer between the two layers, or one or more intervening layers can also be present. "Between" used herein includes both end point values.

[0031] In the context of the present application, the structure described as the first feature "on" the second feature can include the embodiment in which the first and second features are formed in direct contact, and can also include the embodiment in which another feature is formed between the first and second features, so that the first and second features can not be in direct contact.

[0032] It should be noted that the diagram provided in the embodiment only illustrates the basic concept of the utility model in a schematic manner, and only shows the components related to the utility model in the diagram, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed at will, and the component layout pattern can be more complex.

[0033] Embodiment one

[0034] As shown in Figure 1 , Figure 2 , the embodiment provides a water supply system for main pump packing lubrication, which comprises:

[0035] A first water supply pipeline is used for conveying tap water into the packing cavity of the main pump 100. The first water supply pipeline comprises a first main pipeline 11 and a plurality of first branch pipelines 12. One end of each first branch pipeline 12 is connected to the first main pipeline 11, and the other end of each first branch pipeline 12 is connected to the packing cavity of the main pump 100 correspondingly.

[0036] A second water supply pipeline comprises a second main pipeline 21 and a plurality of second branch pipelines 22. One end of each second branch pipeline 22 is connected to the second main pipeline 21, and the other end of each second branch pipeline 22 is connected to the first branch pipeline 12 through a tee joint. The second main pipeline 21 is used for conveying pre-pool water from a pump station pre-pool to the second branch pipeline 22, so that the tap water and the pre-pool water can both lubricate and cool the packing in the packing cavity of the main pump. The use priority of the pre-pool water is higher than that of the tap water.

[0037] Further, the first branch pipeline 12 is provided with a first valve 120 at the segment between the tee joint and the first main pipeline 11, and the second branch pipeline 22 is provided with a second valve 220 at the segment between the tee joint and the second main pipeline 21. The first valve 120 and the second valve 220 are used for adjusting the flow of the tap water and the pre-pool water respectively. The second valve 220 is in a normally open state, so that the packing of the main pump is always in a soaked state, reducing the waiting time when the main pump is started. When the pre-pool water supply is insufficient or an emergency occurs, the tap water supply is switched back. The pump station pre-pool structure is a complete collection pool. After sewage passes through the grid, it is immersed in the pump station pre-pool. The pre-pool water in the pump station pre-pool has been subjected to preliminary purification treatment, which does not consume additional funds and can greatly reduce costs.

[0038] The first valve 120 is a one-way valve, and the second valve 220 can be a common electric valve. Because the cleanliness of the pre-pool water is lower than that of the tap water, the use of a one-way valve can effectively prevent the pre-pool water from flowing into the tap water pipeline. Of course, the first valve 120 and the second valve 220 can both be one-way valves to prevent the two cooling water pipelines from flowing into each other.

[0039] In addition, since the leakage amounts of the cooling water of the multiple main pumps are different, and the added water supply pipelines have near ends and far ends respectively in terms of pipeline positions, the pressure of the near end cooling water pipeline is relatively large, and the excessive cooling water of the packing cooling water supply is prone to splashing out with the bearing rotation, the pressure of the far end pipeline is relatively small, and the insufficient water supply may affect the packing and bearing cooling. By adding the first valve and the second valve, the cooling water supply of each main pump is independently adjusted, the water inlet adjusting valve of the near end main pump can be adjusted to a relatively small opening, and the water inlet adjusting valve of the far end main pump can be adjusted to a relatively large position or even fully open. Through multiple experiments and manual adjustment, the appropriate cooling water adjusting valve opening of each main pump is found.

[0040] Further, the water supply system further comprises a third water supply pipeline for conveying tap water into the packing cavity of the main pump through an independent pipeline; the third water supply pipeline comprises a third main pipeline 31 and multiple third branch pipelines 32, one end of the third branch pipeline 32 is connected to the third main pipeline 31, and the other end of the third branch pipeline 32 is connected to the packing cavity of the main pump 100 correspondingly; the third water supply pipeline is not communicated with the first and second water supply pipelines, so as to serve as a standby water supply pipeline. When the communication of the first and second water supply pipelines needs to be maintained, the third water supply pipeline will not be affected, and the main pump can still be lubricated, so that the normal operation of the main pump is not affected.

[0041] Further, the main pump 100 is located in a pump house, multiple main pumps are arranged in the pump house, a protective cage is arranged around the main pump, and the first water supply pipeline, the second water supply pipeline and the third water supply pipeline are arranged along a steel frame structure, and the first branch pipeline, the second branch pipeline and the third branch pipeline pass through the protective cage and are connected to the main pump.

[0042] The above water supply system greatly reduces the consumption of tap water, because the front pool water of the pump station front pool is introduced into the main pump for packing lubrication. Before the improvement, the daily average consumption of tap water was about 200m 3 per day in non-flood season and about 250m 3 per day in flood season. After the addition of the front pool water supply, the daily average consumption of tap water is about 100m 3 per day in non-flood season and about 120m 3 per day in flood season, which is reduced by 50% compared with the original daily water consumption. If the water saving effect is more significant after long-term use.

[0043] Before the improvement, the main pump needs to be filled with tap water before running, and the waiting time of this step is about 200 seconds. The main pump is started to run after the cooling water signal that meets the opening of the pump appears in the automatic control system. Because the upstream water quantity often increases suddenly during the flood season, the liquid level of the front pool rises rapidly, and the pump needs to be added. If the main pump that is opened fails to start after the 200-second waiting time, another pump needs to be opened again, which has a certain influence on the stable control of the liquid level of the front pool. After the improvement, the water in the front pool is always in a supply state, and the time for opening the pump can be reduced to about 60-100 seconds. When the opened main pump fails, the response speed of opening the second main pump is greatly improved.

[0044] The following Table 1 is a comparison of production data before and after the addition of the front pool water supply pipeline:

[0045] Table 1 Comparison of test conditions before and after the improvement

[0046]

[0047] From the monthly water consumption, the tap water consumption of the main pump house is about 6,000 m 3 per month before the improvement in the non-flood season and about 7,500 m 3 per month in the flood season. After the improvement, a water taking point is added to the front pool, and the water in the front pool is connected to the packing tunnel of the main pump packing through the second water supply pipeline and kept flowing. The packing of the main pump is always in a wet state, which can greatly reduce the waiting time when the main pump is opened. Moreover, after the water source of the front pool replaces the tap water, the tap water consumption is greatly reduced. In addition, because the packing is always in a wet state, the wear during starting is almost zero, and the replacement cycle of the packing is prolonged.

[0048] In summary, the utility model provides a kind of water supply system for main pump packing lubrication, the water supply system includes first water supply pipeline and second water supply pipeline, first water supply pipeline is used to deliver tap water to the packing tunnel of main pump, second water supply pipeline is used to deliver the front pool water from the front pool of pump station to packing tunnel, so that tap water and front pool water can lubricate and cool the packing in the packing tunnel of main pump, and the use priority of front pool water is higher than that of tap water, which replaces tap water with the water source of front pool, thereby greatly reducing tap water consumption and reducing costs. At the same time, because the front pool water is in an open state, the packing of the main pump is always in a wet state, which reduces the waiting time when the main pump is opened and improves the response speed of opening the pump. In addition, because the packing of the main pump is always in a wet state, the wear of the packing during starting is greatly reduced, and the replacement cycle of the packing is prolonged.

[0049] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A water supply system for lubricating the main pump packing, characterized in that: The water supply system comprises: a first water supply pipeline for delivering tap water to the stuffing culvert of the main pump; the first water supply pipeline comprises a first main pipeline and a plurality of first branch pipelines, one end of each first branch pipeline being connected to the first main pipeline, and the other end of each first branch pipeline being connected to the stuffing culvert of the main pump; The second water supply pipeline includes a second main pipeline and multiple second branch pipelines, one end of the second branch pipeline is connected to the second main pipeline, and the other end of the second branch pipeline is connected to the first branch pipeline through a tee; the second main pipeline is used to transport the forebay water from the forebay of the pump station to the second branch pipeline, so that both tap water and forebay water can lubricate and cool the packing in the main pump packing culvert, and the use priority of the forebay water is higher than the use priority of tap water.

2. The water supply system for main pump filler lubrication according to claim 1, characterized in that: The first branch pipeline is provided with a first valve in a section between the tee and the first main pipeline; the second branch pipeline is provided with a second valve in a section between the tee and the second main pipeline.

3. The water supply system for main pump filler lubrication according to claim 2, characterized in that: The first valve is in a normally open state to keep the main pump filler in a wet state.

4. The water supply system for main pump filler lubrication according to claim 2, characterized in that: The first valve is a one-way valve.

5. The water supply system for main pump filler lubrication according to claim 1, characterized in that: The water supply system also includes a third water supply pipeline, which is used to transport tap water to the stuffing culvert of the main pump through an independent pipeline; the third water supply pipeline includes a third main pipeline and multiple third branch pipelines, one end of the third branch pipeline is connected to the third main pipeline, and the other end of the third branch pipeline is correspondingly connected to the stuffing culvert of the main pump.

6. The water supply system for main pump filler lubrication according to claim 1, characterized in that: The main pump is located in a pump room, and a plurality of main pumps are arranged in the pump room.

7. The water supply system for lubricating the main pump filler according to claim 6, characterized in that: The outer shell of the main pump is provided with a protective cage, the first water supply pipeline and the second water supply pipeline are laid along the steel frame structure, and the first branch pipeline and the second branch pipeline pass through the protective cage and are connected to the main pump.

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