Sewage self-cooling lubricating device for water pump

Abstract

A sewage self-cooling lubricating device for a water pump comprises a filter box, a water inlet pipe is arranged on one side of the filter box, a water outlet pipe is arranged on the other side of the filter box, a sewage outlet is formed in the bottom of the filter box, and a damping filter plate with a plurality of damping holes in the surface is arranged in the filter box. The damping filter plate divides the filter box into a primary settling chamber and a secondary settling chamber along the water flow direction, a filter body is arranged in the primary settling chamber, the lower part of the primary settling chamber is a settling space, and the lower end of the filter body is lower than the lowest point of a damping hole in the damping filter plate; a water guide plate penetrating in the front-back direction of the primary settling chamber is arranged in the primary settling chamber corresponding to the water outlet end of the water inlet pipe; and a downward water guide outlet is formed between the water guide plate and the primary settling chamber. According to the utility model, the sewage conveyed by the water pump is filtered, so that the sewage can replace the cooling and lubricating effects of clean water, a large amount of water resources can be saved, and the construction and water consumption cost of a water supply facility for clean water can be saved at the same time.

Description

Technical Field

[0001] This utility model relates to a water-saving field that filters and treats its own wastewater before cooling and lubricating the water pump, and in particular to a wastewater treatment device for cooling and lubricating water pump components such as mechanical seals, guide bearings, and bearing bodies. Background Technology

[0002] Water pumps are widely used in various sectors of the national economy, such as split-case pumps, feed pumps, and long-shaft pumps used in steel and coal enterprises, and sewage pumps used in municipal enterprises. Conservative estimates suggest that the total number of pumps used nationwide is no less than several million.

[0003] Split-case pumps, feed pumps, long-shaft pumps, and sewage pumps used by municipal enterprises are applied in different working environments, but their basic structural forms are similar. A key characteristic is the need for cooling and lubrication of certain pump components, especially in submersible sewage pumps where the impeller is submerged while the motor is above ground, resulting in a very long pump body—sometimes several meters, tens of meters, or even hundreds of meters in length. The pump shaft is composed of several short shafts connected by connecting nuts. A key feature of this long shaft is that it is allowed radial runout during pump operation, but this runout cannot exceed permissible limits. Therefore, each short shaft requires a guide bearing (fixed to a guide bearing bracket). The material of this guide bearing has special requirements: it must be both wear-resistant and elastic. If it is not wear-resistant, the pump life will be short, failing to meet product requirements; if it lacks elasticity, the pump shaft will easily break during radial runout. A material that is both elastic and wear-resistant meets this requirement.

[0004] The guide bearing, made of elastic material, mates with the pump shaft, with a gap of approximately 0.01mm between them. Its function is to support and fix the short shafts. Because each short shaft is supported and fixed by a guide bearing made of elastic material, it also supports the long shaft after the pump is connected. Radial runout of the long shaft is allowed during pump operation, but it cannot exceed the allowable value.

[0005] Because the pump shaft rotates while the elastic guide bearing remains stationary during pump operation, clean water is required for cooling and lubrication. This presents two problems: first, the guide bearing and pump shaft cannot dry-rub together; the guide bearing must be lubricated with clean water during pump startup, otherwise it will be damaged instantly; second, the guide bearing still requires clean water for cooling and lubrication during pump operation, and will burn out if the supply is interrupted; third, impurities inevitably enter the pump during operation, and clean water can flush out these impurities from the gap between the guide bearing and pump shaft, preventing damage to the guide bearing. In short, clean water for cooling and lubrication is indispensable.

[0006] The Ministry of Housing and Urban-Rural Development adopts the standard CJ / T235-2017 for the production of submersible sewage pumps (long-shaft pumps). This standard stipulates that when there is an external cooling water source, the guide bearing below the waterline can be a rubber bearing; if there is no external water source, the bearing above the waterline should not be a rubber bearing, but should be made of a material with self-lubricating properties.

[0007] The common practice among water pump manufacturers now is to use rubber (sometimes PTFE) for the guide bearing and install an inner tube outside the pump shaft to separate the turbid water from the pump shaft. The upper end of the pump has an external clean water interface, through which cooling water is continuously injected into the pump's inner tube via a connecting pipe. Its function is to cool and lubricate the guide bearing, preventing damage to the guide bearing due to water interruption during startup and operation.

[0008] The use of clean water for cooling and lubrication results in a large consumption of this water, wasting valuable water resources and increasing operating costs for enterprises. A typical steel company spends about 1.3 yuan per ton of water, while desalinated seawater costs as much as 7 yuan per ton. The annual cooling water consumption for water-intensive operations in steel companies ranges from 2 million to 15 million yuan, making it necessary to address this issue. Utility Model Content

[0009] The present invention aims to solve the aforementioned problems in the background technology by providing a device for water pumps that uses sewage self-lubrication and cooling.

[0010] A water pump employing a wastewater self-cooling lubrication device includes a filter box. An inlet pipe is located on one side of the filter box, and an outlet pipe is located on the other side. A drain outlet is located at the bottom of the filter box. The key feature is the installation of a damping filter plate with multiple damping holes on its surface inside the filter box. The damping filter plate divides the filter box into a primary settling chamber and a secondary settling chamber along the water flow direction. A filter element is located within the primary settling chamber. The lower part of the primary settling chamber is a settling space, and the lower end of the filter element is lower than the lowest point of the damping holes on the damping filter plate. A guide plate is located within the primary settling chamber corresponding to the outlet end of the inlet pipe, extending along the front-to-back direction of the primary settling chamber. The guide plate and the primary settling chamber form a downward-facing water outlet.

[0011] Furthermore, the inlet pipe is equipped with an inlet valve and an inlet pressure gauge, and the outlet pipe is equipped with an outlet pressure gauge, a flow meter, an outlet valve, and an electric valve.

[0012] Furthermore, a dosing port is provided on the top plate of the filter box corresponding to the primary settling chamber.

[0013] Furthermore, a heating pipe is installed on the side plate of the filter box corresponding to the lower part of the primary settling chamber, and the main body of the heating pipe is inserted into the primary settling chamber.

[0014] Furthermore, the top plate of the filter box corresponding to the primary settling chamber and the side plate of the filter box are detachable installation structures.

[0015] Furthermore, the filter body is composed of multiple filter brushes.

[0016] Furthermore, the filter brushes are arranged vertically and the core of the filter brushes is detachably mounted on the lower surface of the top plate of the filter box.

[0017] Furthermore, the volume of the primary settling chamber is larger than the volume of the secondary settling chamber;

[0018] Furthermore, the diameter of the inlet pipe is larger than the diameter of the outlet pipe.

[0019] Furthermore, there are two sewage outlets, which are respectively connected to the primary settling chamber and the secondary settling chamber.

[0020] The beneficial effects of this utility model are: This utility model uses the sewage transported by the water pump for filtration treatment, so that it can replace the cooling and lubrication effect of clean water, which can save a lot of water resources, and at the same time save the construction and water cost of clean water supply facilities. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 yes Figure 1 The left view;

[0023] Figure 3 yes Figure 1 Sectional view of AA;

[0024] Figure 4 This is a schematic diagram of the pipeline connection structure of this utility model. Detailed Implementation

[0025] As shown in the figure, a water pump employs a wastewater self-cooling lubrication device, including a filter box 1. An inlet pipe 4 is provided on one side of the filter box 1, and an outlet pipe 15 is provided on the other side. The diameter of the inlet pipe 4 is larger than the diameter of the outlet pipe 15. A drain port 17 is provided at the bottom of the filter box 1, and a drain valve 18 is connected to the drain port. A damping filter plate 13 with multiple damping holes 1301 on its surface is arranged vertically inside the filter box 1. The damping filter plate 13 divides the filter box into a primary settling chamber 2 and a secondary settling chamber 14 along the direction from the inlet pipe 4 to the outlet pipe 15. The volume of the primary settling chamber 2 is larger than the volume of the secondary settling chamber 14. There are two drain ports 17, which are respectively connected to the primary settling chamber 2 and the secondary settling chamber 14. A filter body 11 is provided in the primary settling chamber 1. The lower part of the primary settling chamber is a settling space, and the highest point of the lower end of the filter body 11 is lower than the lowest point of the damping hole 1301 on the damping filter plate 13. A water guide plate 3 is provided in the primary settling chamber 2, corresponding to the outlet end of the inlet pipe 4, extending along the front-to-back direction of the primary settling chamber 2. A downward-facing water outlet 301 is formed between the water guide plate 3 and the primary settling chamber 2. A chemical dosing port 8 is provided on the top plate of the filter box 1, corresponding to the primary settling chamber. A heating pipe 16 is provided on the side plate of the filter box 1, corresponding to the lower part of the primary settling chamber, with the main body of the heating pipe 16 inserted into the primary settling chamber 2.

[0026] In one embodiment of this utility model, the top plate of the filter box 1 corresponding to the primary settling chamber and the side plate of the filter box 1 are detachable installation structures. The detachable structure includes an upper cover plate 7, a side fixing plate 5 fixedly installed on the side plate of the filter box 1, and bolts 6 connected between the upper cover plate 7 and the side fixing plate 5 by threads.

[0027] In one embodiment of this utility model, the filter body 11 is composed of a plurality of vertically arranged filter brushes, and a nut 11 is fixedly installed on the lower surface of the top plate of the filter box 11. The top of the spindle 12 of the filter brush is connected to the nut by a thread, so as to achieve detachable installation.

[0028] An inlet valve 19 and an inlet pressure gauge 20 are installed on the inlet pipe 5, and an outlet pressure gauge 21, a flow meter 22, an outlet valve 23 and an electric valve 24 are installed on the outlet pipe 15. The inlet valve and the outlet valve are manual regulating valves.

[0029] The water pump described above operates using a wastewater self-cooling lubrication device.

[0030] 1. Connect the inlet end of the inlet pipe 4 to the main pipeline of the drainage system, and fully open the electric valve 24 and the inlet valve 19; use the outlet valve 23 to adjust the outlet flow rate, and display the outlet flow rate through the flow meter 22, so that the ratio of the outlet flow rate to the flow area of ​​the second settling chamber 14 is less than 7 mm / s, and record the initial values ​​of the inlet pressure and the outlet pressure at this time.

[0031] 2. Perform normal drainage;

[0032] 3. When the inlet pressure gauge 20 shows that the change in inlet pressure exceeds 5% of the initial inlet pressure, the outlet flow rate is adjusted by outlet valve 23 to keep the ratio of outlet flow rate to the flow area of ​​the second settling chamber less than 7 mm / s.

[0033] 4. When the difference between the outlet pressure and the inlet pressure exceeds 5%, close the inlet valve 19, add the medicine through the dosing port 8, start the heater 16 to heat, and stop heating when the water temperature reaches the set temperature (the set temperature range is 50℃-60℃, and 52℃ in this embodiment). Open the drain valve 18 on the drain port 17, close the outlet valve 23, open the inlet valve 19, and clean. When clean water is discharged from the drain port 17, close the drain valve 18, open the outlet valve 23, and drain normally.

[0034] The above are merely specific embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water pump employing a wastewater self-cooling lubrication device, comprising a filter box, an inlet pipe on one side of the filter box, an outlet pipe on the other side of the filter box, and a drain outlet at the bottom of the filter box, characterized in that: A damping filter plate with multiple damping holes on its surface is installed inside the filter box. The damping filter plate divides the filter box into a primary settling chamber and a secondary settling chamber along the water flow direction. A filter body is installed in the primary settling chamber. The lower part of the primary settling chamber is a settling space, and the lower end of the filter body is lower than the lowest point of the damping holes on the damping filter plate. A water guide plate is provided in the primary settling chamber corresponding to the water outlet end of the inlet pipe, which runs through the front and back direction of the primary settling chamber. The water guide plate and the primary settling chamber form a downward water outlet.

2. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein The inlet pipe is equipped with an inlet valve and an inlet pressure gauge, and the outlet pipe is equipped with an outlet pressure gauge, a flow meter, an outlet valve, and an electric valve.

3. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein A dosing port is provided on the top plate of the filter box corresponding to the primary settling chamber.

4. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein A heating pipe is installed on the side plate of the filter box corresponding to the lower part of the primary settling chamber, and the main body of the heating pipe is inserted into the primary settling chamber.

5. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein The top plate of the filter box, corresponding to the primary settling chamber, and the side plate of the filter box are detachable installation structures.

6. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein The filter body consists of multiple filter brushes.

7. The water pump using the sewage self-cooling lubricating device according to claim 6, wherein The filter brushes are arranged vertically, and the core shaft of the filter brushes can be detachably installed on the lower surface of the top plate of the filter box.

8. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein The volume of the primary settling chamber is larger than the volume of the secondary settling chamber.

9. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein The diameter of the inlet pipe is larger than the diameter of the outlet pipe.

10. The water pump using the sewage self-cooling lubricating device according to claim 1, wherein There are two sewage outlets, which are respectively connected to the primary settling chamber and the secondary settling chamber.

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