CN215633943U - Water supply pump sealing water system of thermal power plant - Google Patents
Water supply pump sealing water system of thermal power plant Download PDFInfo
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- CN215633943U CN215633943U CN202121981772.XU CN202121981772U CN215633943U CN 215633943 U CN215633943 U CN 215633943U CN 202121981772 U CN202121981772 U CN 202121981772U CN 215633943 U CN215633943 U CN 215633943U
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Abstract
The utility model provides a sealing water system of a feed pump of a thermal power plant, which comprises: the water storage tank is provided with overflow holes at the upper end part, the water pipe and the floating ball are arranged in the water storage tank, the water pipe comprises a first water pipe for communicating the water storage tank with a water supply pump and a second water pipe for communicating the water storage tank with a condenser, the second water pipe is provided with a regulating gate which is communicated with the water storage tank, the water supply pump and the condenser through the water pipe, the temporary storage and the reutilization of sealing water can be realized, the floating ball is formed by welding stainless steel plates and floats up and down along the height of a liquid level, the floating ball is connected with a regulating gate rod for controlling the opening degree of the regulating gate, the floating ball is filled with a hard dense sponge-like foaming core, the density of the foaming core is smaller than that of water, the volume water absorption rate of the foaming core is smaller than 2 percent, the foaming core can bear the lowest temperature of 100 ℃, when the welding line of the floating ball cracks due to fatigue, the water is not easy to enter the floating ball, even if the water enters, the floating ball cannot generate great influence on the buoyancy of the floating ball, and the floating ball cannot lose the control capability of the regulating gate, the reliability is good, and the waste is not easy.
Description
Technical Field
The utility model relates to the technical field of auxiliary machines of thermal power plants, in particular to a water supply pump sealing water system of a thermal power plant.
Background
The water supply pump is one of the important auxiliary machines of the thermal power plant, the existing water supply pump mostly adopts a hydraulic sealing mode when in operation to eliminate the abrasion of a rotor, reduce the failure rate and prolong the service life, the sealing water of the existing water supply pump mostly comes from a condenser outlet miscellaneous water main pipe, for example, Chinese patent CN112443761A discloses a sealing water system, but the system is not provided with a water storage tank, is not convenient to recover the sealing water to the condenser for reuse, and also has a sealing water system which adopts the water storage tank to temporarily store the sealing water and timely supplement the water, but the system mostly adopts a hollow floating ball to monitor the water level and control the opening degree of a regulating valve, when the water level in the water storage tank is lower, the bottom of the floating ball easily collides with the bottom of the water storage tank to generate vibration, when in long-term use, the periodic vibration easily causes fatigue cracking of the welding line of the floating ball, the water enters through the cracked welding line to make the floating ball sink, thereby losing the control capability of the regulating valve, poor reliability and easy waste of sealing water.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a sealing water system of a water feeding pump of a thermal power plant, which can recycle sealing water, has good reliability and is not easy to waste.
In order to achieve the purpose, the technical scheme provided by the utility model is that a water sealing system of a feed pump of a thermal power plant comprises:
the upper end part of the water storage tank is provided with an overflow hole;
the water pipe comprises a first water pipe and a second water pipe, the first water pipe is used for communicating the water storage tank and the water feeding pump, the second water pipe is used for communicating the water storage tank and the condenser, and an adjusting door is arranged on the second water pipe;
the floating ball is arranged in the water storage tank, floats up and down along with the height of the liquid level in the water storage tank, is formed by welding stainless steel plates and is connected with a gate adjusting rod for controlling the opening degree of the gate;
the floating ball is filled with a foam core, the foam core is in a hard dense sponge shape, the density of the foam core is less than that of water, the volume water absorption of the foam core is less than 2%, and the foam core can bear the temperature of 100 ℃ at the lowest.
Preferably, the floating ball is a cylindrical part with two sealed ends, and the axis of the floating ball is vertical to the horizontal plane.
Further preferably, the density of the lower part of the foam core is greater than the density of the upper part thereof.
Further preferably, a diaphragm plate is arranged in the floating ball and is connected with the inner wall of the floating ball in a welding mode.
Further preferably, the outer wall of the floating ball is provided with a plurality of hanging lugs for mounting the balancing weight, and the hanging lugs are distributed in an annular array along the axial lead of the floating ball.
Further preferably, the hanging lug is close to the lower end face of the floating ball.
Further preferably, the lower end surface of the floating ball is connected with a rubber pad with a buffering effect, and the rubber pad is attached to the lower end surface of the floating ball.
Further preferably, the periphery of the rubber pad is upwards and vertically folded and hoops the outer wall of the floating ball.
Preferably, the second water pipe communicates with the bottom of the reservoir.
Further preferably, the density of the foaming core is 5% -8% of the water density, and the thickness of the stainless steel plate is 2-4 mm.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model provides a sealing water system of a feed pump of a thermal power plant, which comprises: the water storage tank is provided with overflow holes at the upper end part, the water pipe and a floating ball arranged in the water storage tank, the water pipe comprises a first water pipe for communicating the water storage tank with a water supply pump and a second water pipe for communicating the water storage tank with a condenser, the second water pipe is provided with a regulating gate which is communicated with the water storage tank, the water supply pump and the condenser through the water pipe, the temporary storage and the reutilization of sealing water can be realized, the floating ball is formed by welding stainless steel plates and floats up and down along the height of a liquid level, the floating ball is connected with a regulating gate rod for controlling the opening degree of the regulating gate, the density of the foaming core is smaller than that of water by filling the foaming core in the floating ball in a hard dense sponge shape, the volume water absorption rate of the foaming core is smaller than 2 percent, the foaming core can bear the lowest temperature of 100 ℃, when the welding line of the floating ball cracks due to fatigue, the water is not easy to enter the floating ball, even if the water enters, the floating ball cannot generate great influence on the buoyancy of the floating ball, and the floating ball cannot lose the control capability of the regulating gate, the reliability is good, and the waste is not easy.
Drawings
FIG. 1 is a schematic front view, partially in section, of a preferred embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view at a in fig. 1.
Wherein: 10. a water storage tank; 11. an overflow aperture; 12. a feed pump; 13. a condenser; 21. a first water pipe; 22. a second water pipe; 221. adjusting a door; 30. a floating ball; 31. a door adjusting lever; 32. a diaphragm plate; 33. hanging a lug; 331. a balancing weight; 34. a rubber pad; 40. a foam core.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.
The vertical direction in the present invention refers to the vertical direction in fig. 1 and 2.
As shown in fig. 1-2, the present invention provides a thermal power plant feed pump sealing water system, comprising: the water storage tank 10 is used for temporarily storing sealing water for the water feeding pump 10 of the thermal power plant, and the upper end part of the water storage tank 10 is provided with an overflow hole 11; the water pipe comprises a first water pipe 21 and a second water pipe 22, the first water pipe 21 is used for communicating the water storage tank 10 and the feed pump 12, the second water pipe 22 is used for communicating the water storage tank 10 and the condenser 13, the second water pipe 22 is provided with an adjusting door 221, the adjusting door is one of valves, and the flow can be changed by changing the position of the valve core and adjusting the size of the flow area; the floating ball 30 is arranged in the water storage tank 10, specifically, the floating ball 30 can float up and down along with the liquid level in the water storage tank 10, the floating ball 30 is formed by welding stainless steel plates with the thickness of 3mm, the floating ball 30 is connected with a door adjusting rod 31 for controlling the opening degree of the door adjusting 221, the floating ball 30 is filled with the foaming core 40, the foaming core 40 is in a hard dense sponge shape, the density of the foaming core 40 is less than that of water, specifically, the density of the foaming core 40 is 5% -8% of the water density, the volume water absorption of the foaming core 40 is less than 2%, and as the running temperature of the water sealed by the water supply pump 12 is higher, the foaming core 40 needs to have the characteristic of high temperature resistance, in the embodiment, the foaming core 40 can resist the temperature of 100 ℃ at the lowest.
The advantage that sets up like this lies in, when floater welding seam fatigue fracture, in water is difficult for getting into the floater, even intake, also can not produce great influence to the buoyancy of floater, the floater can keep showy state, can not sink the end, also can not lose the accent door controllability, good reliability, difficult extravagant.
Because the spherical parts are difficult to weld and inconvenient to connect with the door adjusting rod, in the embodiment, the floating ball 30 is a cylindrical part with two sealed ends, and the axial lead of the floating ball 30 is vertical to the horizontal plane, but after the arrangement, the floating ball 30 is easy to roll and the like when floating, particularly when water is replenished into the water storage tank 10, the posture of the floating ball 30 is difficult to control, and the false operation of the door adjusting is easy to cause.
In order to improve the stability of the floating ball 30 when floating, in the embodiment, a transverse partition plate 32 is arranged in the floating ball 30, the transverse partition plate 32 is welded with the inner wall of the floating ball 30, the foaming core 40 is divided into an upper part and a lower part by the transverse partition plate 32, and the density of the foaming core 40 below the transverse partition plate 32 is greater than that of the foaming core 40 above the transverse partition plate 32.
In order to adjust the height of the part of the floating ball 30 exposed from the water surface, in this embodiment, the outer wall of the floating ball 30 is provided with a plurality of hanging lugs 33 for mounting the weight 331, the hanging lugs 33 are distributed in an annular array along the axial lead of the floating ball 30, and the hanging lugs 33 are arranged near the lower end surface of the floating ball 30 for maintaining the stability of the floating ball 30.
In order to reduce the impact force when the floating ball 30 impacts the bottom of the water storage tank 10, in this embodiment, the lower end surface of the floating ball 30 is connected with a rubber pad 34 with a buffering effect, the rubber pad 34 is attached to the lower end surface of the floating ball 30, specifically, the rubber pad 34 is annular, the periphery of the rubber pad 34 is upwards and vertically folded and hoops the outer wall of the floating ball 30, and the arrangement can further protect and seal the welding line at the bottom edge of the floating ball 30.
To facilitate the condenser 13 to withdraw the seal water from the reservoir 10, in this embodiment, the second water pipe 22 communicates with the bottom of the reservoir 10.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A thermal power plant feed pump seal water system, comprising:
the upper end part of the water storage tank is provided with an overflow hole;
the water pipe comprises a first water pipe and a second water pipe, the first water pipe is used for communicating the water storage tank and the water feeding pump, the second water pipe is used for communicating the water storage tank and the condenser, and an adjusting door is arranged on the second water pipe;
the floating ball is arranged in the water storage tank, floats up and down along with the height of the liquid level in the water storage tank, is formed by welding stainless steel plates and is connected with a gate adjusting rod for controlling the opening degree of the gate;
the method is characterized in that:
the floating ball is filled with a foaming core, the density of the foaming core is less than that of water, the volume water absorption of the foaming core is less than 2%, and the foaming core can bear the temperature of 100 ℃ at the lowest.
2. The thermal power plant feed pump sealing water system as claimed in claim 1, wherein: the floating ball is a cylindrical part with two sealed ends, and the axis of the floating ball is vertical to the horizontal plane.
3. The thermal power plant feed pump sealing water system as claimed in claim 2, wherein: the density of the lower part of the foam core is greater than that of the upper part thereof.
4. The thermal power plant feed pump sealing water system as claimed in claim 2, wherein: and a transverse partition plate is arranged in the floating ball and is welded with the inner wall of the floating ball.
5. The thermal power plant feed pump sealing water system as claimed in claim 2, wherein: the outer wall of the floating ball is provided with a plurality of hanging lugs for mounting the balancing weight, and the hanging lugs are distributed in an annular array along the axial lead of the floating ball.
6. The thermal power plant feed pump sealing water system as claimed in claim 5, wherein: the hanging lug is close to the lower end face of the floating ball.
7. The thermal power plant feed pump sealing water system as claimed in claim 2, wherein: the lower end face of the floating ball is connected with a rubber pad with a buffering effect, and the rubber pad is attached to the lower end face of the floating ball.
8. The thermal power plant feed pump seal water system as claimed in claim 7, wherein: the periphery of the rubber pad is vertically turned upwards and hoops the outer wall of the floating ball.
9. The sealed water system of the thermal power plant feed pump as claimed in claim 1, wherein the second water pipe is communicated with the bottom of the water storage tank.
10. The thermal power plant feed pump seal water system according to any one of claims 1 to 9, characterized in that: the density of the foaming core is 5% -8% of the water density, and the thickness of the stainless steel plate is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121981772.XU CN215633943U (en) | 2021-08-23 | 2021-08-23 | Water supply pump sealing water system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121981772.XU CN215633943U (en) | 2021-08-23 | 2021-08-23 | Water supply pump sealing water system of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633943U true CN215633943U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121981772.XU Active CN215633943U (en) | 2021-08-23 | 2021-08-23 | Water supply pump sealing water system of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633943U (en) |
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2021
- 2021-08-23 CN CN202121981772.XU patent/CN215633943U/en active Active
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