CN216752581U - Pre-pressurizing closed cooling circulation system with pressure adjusting function - Google Patents
Pre-pressurizing closed cooling circulation system with pressure adjusting function Download PDFInfo
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- CN216752581U CN216752581U CN202123410004.1U CN202123410004U CN216752581U CN 216752581 U CN216752581 U CN 216752581U CN 202123410004 U CN202123410004 U CN 202123410004U CN 216752581 U CN216752581 U CN 216752581U
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Abstract
The utility model discloses a pre-charging closed cooling circulation system with a pressure adjusting function, which comprises a frequency converter, a circulating water pump, a water injection valve and a heat dissipation fan, wherein the water injection valve is arranged on a water outlet pipeline of the circulating water pump, the heat dissipation fan is arranged on a water inlet pipeline of the circulating water pump, the frequency converter is connected to a water pipeline communicated with a water outlet pipeline, the water inlet pipeline and the water outlet pipeline jointly form a circulating pipeline communicated with the frequency converter and the circulating water pump, and an energy accumulator which is positioned at the rear end of the frequency converter and at the front end of the heat dissipation fan and is used for adjusting the pressure in the circulating pipeline is arranged on the water inlet pipeline. The utility model does not need to replace a circulating water pump, reduces the workload, saves the economic cost, compensates the pressure in the circulating pipeline, ensures that the system can not send out an alarm and can normally operate.
Description
Technical Field
The utility model relates to the technical field of cooling circulation of frequency converters, in particular to a pre-charging closed cooling circulation system with a pressure adjusting function.
Background
In the prior pre-charging closed cooling circulation system, the resistance of the system is increased due to the long pipeline, and the pressure attenuation is obvious in the cooling water circulation process, namely the pressure at the outlet of a pump is higher, but the pressure of cooling water flowing to the frequency converter is very low and is lower than the pressure required by the frequency converter design. The equipment of the project is already installed in batches and is urgently needed to be put into use. The user proposes a modification scheme that: the circulation pump with a larger flow rate is replaced, thereby increasing the circulation pressure. This solution has the following drawbacks: due to the batch equipment, the replacement of the circulating pump inevitably increases the great economic cost; moreover, the workload involved in replacing the circulation pump is large and cannot be completed in a short time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pre-charging closed cooling circulation system with a pressure adjusting function, a circulating water pump does not need to be replaced, the workload is reduced, the economic cost is saved, the pressure in a circulation pipeline is compensated, the system cannot give an alarm, and the system can normally operate.
In order to solve the technical problem, the utility model adopts the following scheme:
the utility model provides a pre-charge closed cooling circulation system with pressure regulation function, includes converter, circulating water pump, water injection valve, cooling fan, the water injection valve sets up on circulating water pump's the outlet pipeline, and cooling fan sets up on circulating water pump's the inlet pipeline, and the converter is connected on the water route of water intake pipe and outlet pipe way switch-on, and water intake pipe, outlet pipe way constitute jointly and connect converter, circulating water pump's circulating line, are equipped with on the water intake pipe way to be located the converter rear end, cooling fan front end and are used for adjusting the energy storage ware of circulating line medium pressure.
In this scheme, because the energy storage ware is installed at the rear end that rivers passed through the directional flow converter, circulating water pump is with the hydrologic cycle back in the pipeline, because the converter resistance, the water pressure of converter rear end is less than the energy storage ware state pressure of retaining, the energy storage ware is in the state to moisturizing in the water intake pipe this moment, the water storage in the energy storage ware is released in the pipeline, thereby there are more water to participate in the circulation, be equivalent to the discharge that has increased the system, the pressure ratio that the inside detecting element of system detected this moment is high than the required pressure of design, the system does not report the trouble again, system normal operating.
Optionally, the energy accumulator is an energy storage tank, the energy storage tank is a bladder type expansion tank, and the air pressure of a bladder in the expansion tank is 1.5 bar.
Optionally, the pre-charging pressure in the water outlet pipeline and the water inlet pipeline is 4 bar.
Optionally, the water inlet pipeline is provided with a PT100 located at the installation position of the energy accumulator.
Optionally, a temperature control valve is arranged on a pipeline at the front end of the cooling fan, and a filter is arranged between the temperature control valve and the energy accumulator.
Optionally, a safety valve, a pressure gauge, a pressure switch and an exhaust valve are sequentially arranged on a pipeline between the water injection valve and the circulating water pump.
Optionally, a pressure transmitter is arranged on the frequency converter.
The utility model has the following beneficial effects:
1. according to the utility model, the energy storage device is arranged at the rear end of the directional flow frequency converter, the circulating water pump circulates water in the pipeline, the water pressure at the rear end of the frequency converter is lower than the pressure of the water storage state of the energy storage device due to the resistance of the frequency converter, at the moment, the energy storage device is in a state of supplementing water to the water inlet pipeline, the stored water in the energy storage device is released into the pipeline, so that more water participates in circulation, which is equivalent to increase the water flow of the system, at the moment, the pressure detected by the detection element in the system is higher than the pressure required by design, the system does not report faults any more, and the system operates normally.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a conventional pre-pressurized closed cooling cycle system.
Reference numerals: 1-energy storage tank, 2-water injection valve, 3-safety valve, 4-pressure gauge, 5-pressure switch, 6-evacuation valve, 7-heat dissipation fan, 8-circulating water pump, 9-PT100, 10-filter, 11-temperature valve, 12-pressure transmitter, 13-water inlet pipeline, 14-water outlet pipeline, 15-frequency converter, 16-water storage cavity and 17-leather bag.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1, a pre-pressurized closed cooling circulation system with pressure regulation function includes a frequency converter 15, a circulating water pump 8, a water injection valve 2, and a heat dissipation fan 7, the water injection valve 2 is disposed on a water outlet pipeline 14 of the circulating water pump 8, the heat dissipation fan 7 is disposed on a water inlet pipeline 13 of the circulating water pump 8, the frequency converter 15 is connected to a water path through which the water inlet pipeline 13 and the water outlet pipeline 14 are connected, the water inlet pipeline 13 and the water outlet pipeline 14 jointly form a circulating pipeline connecting the frequency converter 15 and the circulating water pump 8, and the water inlet pipeline 13 is provided with an energy accumulator which is located at the rear end of the frequency converter 15 and at the front end of the heat dissipation fan 7 and is used for regulating pressure in the circulating pipeline.
As shown in fig. 2, in the existing pre-charging closed cooling circulation system, especially in the aspect of wind power generation, the internal frequency converter is large in volume and needs to be cooled, the frequency converter of the wind power generation adopts more frequency converters up to 2MW electrically excited full power V2.0-DWE 205AEL0109, after the water pump is circulated, because the resistance of the frequency converter 15 is large, the pressure of the pipeline in front of the frequency converter 15 is larger than the pressure before the water pump is circulated, namely, the pressure is larger than 4bar, the bladder 17 of the energy storage tank 1 is continuously compressed, and the energy storage tank 1 is still in a water storage state. So that only a smaller amount of water participates in the circulation, resulting in a very low pressure decay of the water after passing through the frequency converter 15, a system detection pressure lower than the design pressure, and a system failure.
Install the energy storage ware in the rear end that rivers passed through directional flow frequency converter 15 in this embodiment, the energy storage ware is installed on water intake pipe 13 promptly, circulating water pump 8 is behind the hydrologic cycle in the pipeline, because 15 resistances of frequency converter, the water pressure of 15 rear ends of frequency converter is less than the energy storage ware state pressure of retaining, the energy storage ware is in the state to moisturizing in water intake pipe 13 this moment, the water storage in the retaining chamber 16 in the energy storage ware is released to the pipeline, thereby there is more water participation and circulation, the discharge of system has been increased in other words, the pressure ratio that the inside detecting element of system detected this moment is higher than the required pressure of design, the system does not report the trouble again, system normal operating.
Specifically, the energy accumulator is an energy storage tank 1, the energy storage tank 1 is a leather bag 17 type expansion tank, and the air pressure of the leather bag 17 in the expansion tank is 1.5 bar. The energy storage tank 1 belongs to a leather bag 17 type expansion tank and has the functions of adjusting the internal pressure of a circulation pipeline: when the water pressure in the circulating pipeline is higher than the pressure in the leather bag 17, the expansion tank plays a role in storing water; and when the external circulating pressure is lower than the water storage pressure, the energy storage tank 1 can supplement water into the system so as to prevent the water pressure in the circulating pipeline from being too low.
Specifically, the pre-charging water pressure in the water outlet pipeline 14 and the water inlet pipeline 13 is 4 bar. When the circulating water pump 8 does not work, the system pre-charging water pressure is 4bar, namely the pressure in the pipeline is higher than the air pressure of the leather bag 17 of the energy storage tank 1, and the leather bag 17 is compressed to enable the energy storage tank 1 to be in a water storage state.
Specifically, the water inlet pipeline 13 is provided with a PT100 located at the installation position of the energy accumulator, the PT100 is a platinum thermal resistor, and the PT100 is used for monitoring the water temperature coming out of the rear end of the frequency converter 15 and providing data for the temperature control valve 11 through water temperature data so as to open or close the temperature control valve 11.
Specifically, a temperature control valve 11 is arranged on a pipeline at the front end of the heat radiation fan 7, and a filter 10 is arranged between the temperature control valve 11 and the energy accumulator. The temperature control valve 11 detects the temperature of water in the pipeline to provide data support for the opening or closing of the cooling fan 7.
Specifically, a safety valve 3, a pressure gauge 4, a pressure switch 5 and an exhaust valve 6 are sequentially arranged on a pipeline between the water injection valve 2 and the circulating water pump 8.
Specifically, the frequency converter 15 is provided with a pressure transmitter 12. Pressure transmitter 12 is primarily comprised of a load cell sensor (also referred to as a pressure sensor), measurement circuitry, and process connections. The pressure sensor can convert physical pressure parameters of gas, liquid and the like sensed by the pressure element sensor into standard electric signals (such as 4-20 mADC and the like) so as to supply secondary instruments such as an indication alarm instrument, a recorder, a regulator and the like for measurement, indication and process regulation.
The working principle of the utility model is as follows: the air pressure of the leather bag 17 in the energy storage tank 1 is 1.5 bar; when the water pump does not work, the pre-charging pressure of the system is 4bar, namely the pressure in the pipeline is higher than the air pressure of the leather bag 17 of the energy storage tank 1, and the leather bag 17 is compressed to enable the energy storage tank 1 to be in a water storage state. Install energy storage tank 1 in the rear end that rivers passed through directional flow converter 15, the water pump circulation back, also because 15 resistances of converter, the water pressure of 15 rear ends of converter is less than 4bar (energy storage tank 1 retaining state pressure), and energy storage tank 1 is in the state to moisturizing in the system's pipeline this moment, and the water storage in energy storage tank 1 is released in the pipeline to there is more water to participate in the circulation, has increased the discharge of system in other words. The pressure detected by the pressure transmitter 12 on the frequency converter 15 is higher than the pressure required by design, the system does not report faults any more, the system operates normally, and the circulating water pump 8 does not need to be replaced any more, so that the economic cost is saved.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a pre-charge closed cooling circulation system with pressure regulation function, its characterized in that, including converter (15), circulating water pump (8), water injection valve (2), cooling fan (7), water injection valve (2) set up on outlet pipe way (14) of circulating water pump (8), and cooling fan (7) set up on water intake pipe (13) of circulating water pump (8), and water route that inlet pipe way (13) and outlet pipe way (14) switch-on is connected in converter (15), and inlet pipe way (13), outlet pipe way (14) constitute jointly and connect converter (15), circulating water pump (8)'s circulating pipe way, are equipped with on inlet pipe way (13) to be located converter (15) rear end, cooling fan (7) front end and are arranged in adjusting the circulating pipe way the energy storage ware of pressure.
2. A pre-charge pressure closed cooling circulation system with pressure regulation function according to claim 1, characterized in that the accumulator is an energy storage tank (1), the energy storage tank (1) is an expansion tank in the form of a bladder (17), and the air pressure of the bladder (17) in the expansion tank is 1.5 bar.
3. A pre-charge closed cooling cycle system with pressure regulation function as claimed in claim 1, characterized in that the pre-charge pressure in the water outlet line (14) and the water inlet line (13) is 4 bar.
4. A pre-charge pressure closed cooling cycle system with pressure regulating function as claimed in claim 1, characterized in that the water inlet line (13) is provided with PT100(9) at the accumulator mounting location.
5. The pre-charging closed cooling circulation system with pressure regulation function of claim 1, wherein a temperature control valve (11) is arranged on a pipeline at the front end of the heat radiation fan (7), and a filter (10) is arranged between the temperature control valve (11) and the energy accumulator.
6. The pre-pressurized closed cooling cycle system with pressure regulation function of claim 1, wherein the pipeline between the water injection valve (2) and the circulating water pump (8) is provided with a safety valve (3), a pressure gauge (4), a pressure switch (5) and an exhaust valve (6) in sequence.
7. A pre-charge pressure closed cooling circulation system with pressure regulation function according to claim 1, characterized in that the frequency converter (15) is provided with a pressure transmitter (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123410004.1U CN216752581U (en) | 2021-12-30 | 2021-12-30 | Pre-pressurizing closed cooling circulation system with pressure adjusting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123410004.1U CN216752581U (en) | 2021-12-30 | 2021-12-30 | Pre-pressurizing closed cooling circulation system with pressure adjusting function |
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| Publication Number | Publication Date |
|---|---|
| CN216752581U true CN216752581U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123410004.1U Active CN216752581U (en) | 2021-12-30 | 2021-12-30 | Pre-pressurizing closed cooling circulation system with pressure adjusting function |
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| Country | Link |
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| CN (1) | CN216752581U (en) |
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2021
- 2021-12-30 CN CN202123410004.1U patent/CN216752581U/en active Active
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