Device for monitoring medium leakage in evaporative cooling system of genset

Abstract

The utility model provides a medium leakage monitoring device for generator set evaporation cooling system, including two pipelines, two pipeline junctions are equipped with two bushings, one of bushings is equipped with the communicating pipe, the communicating pipe bottom is equipped with the capillary, the capillary one side is equipped with the intercommunication's air cylinder, the capillary other side is equipped with the intercommunication's liquid storage cylinder, liquid storage cylinder one end is equipped with the intercommunication's cooling device, and the thermometer is equipped on one bushing. The overall device can recover gaseous and liquid decafluoropentane, and the thermometer cooperates with halogen detection meter to greatly improve the accuracy of alarm, avoiding the risk of false alarm. Avoiding the phenomenon of affecting the sealing performance and service life of components and having safety risk due to long-term leakage of decafluoropentane. At the same time, long-term leakage can cause insufficient cooling medium, reduced heat dissipation efficiency, abnormal temperature rise of key components of the unit, equipment overheating, accelerated insulation aging, and even shutdown failure.

Description

Technical Field

[0001] This utility model relates to the field of generator monitoring, and in particular to a device for monitoring medium leakage in the evaporative cooling system of a generator set. Background Technology

[0002] The hydropower station is equipped with multiple 700MW turbine generator units that use evaporative cooling for their stator bars. Evaporative cooling technology uses decafluoropentane (HFC-4310) liquid, which has good insulation properties and a suitable boiling point, to replace pure water as the cooling medium. It is filled into the hollow conductors of the generator stator bars and uses the latent heat absorbed by the liquid boiling to cool the generator. The boiling point of decafluoropentane is around 55℃. The vapor can be released from the condenser at room temperature through secondary cooling water without compression. By utilizing the heat absorption and the change in fluid density, the generator achieves its own cooling purpose.

[0003] Evaporative cooling units have numerous cooling circuit joints, and leaks are inevitable during long-term operation of hydro-generator units. Due to the large number of joints, leaks are often difficult to detect. Long-term leakage of decafluoropentane can carry impurities and deposit on equipment surfaces, affecting component sealing and service life. Furthermore, high concentrations of decafluoropentane can irritate the respiratory tract and skin, leading to a decrease in local oxygen concentration and posing a safety risk. Prolonged leakage can also result in insufficient cooling medium, reduced heat dissipation efficiency, and potentially abnormally high temperatures in critical components, leading to overheating, accelerated insulation aging, and even shutdown failures. Utility Model Content

[0004] This utility model provides a medium leakage monitoring device for the evaporative cooling system of generator sets, which solves the problem that the numerous joints in the cooling circuit of evaporative cooling units make it difficult to detect decafluoropentane leakage; long-term leakage poses safety risks; insufficient cooling medium reduces heat dissipation efficiency and may cause abnormal temperature rise of key components of the unit, leading to equipment overheating, accelerated insulation aging, or even shutdown failure.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a medium leakage monitoring device for an evaporative cooling system of a generator set, comprising two pipes, two sleeves at the connection of the two pipes, a connecting pipe on one sleeve, a thin pipe at the bottom of the connecting pipe, a venting cylinder on one side of the thin pipe, a liquid storage cylinder on the other side of the thin pipe, a cooling device at one end of the liquid storage cylinder, and a thermometer on one sleeve.

[0006] In the preferred embodiment, the pipeline is equipped with flanges, two flanges abut together, and the flanges have multiple flange holes, with bolts abutting against the flange holes.

[0007] In the preferred embodiment, two sleeves wrap around the connection of the two pipes. The sleeves include a ring sleeve, pressure sleeves on both sides of the ring sleeve, and connecting plates on both sides of the pressure sleeve. The connecting plates of the two sleeves are connected by a second bolt.

[0008] In the preferred embodiment, the flange and multiple bolts are located inside the annulus of the two sleeves, and the pressure sleeve abuts against the outer wall of the pipe.

[0009] In the preferred embodiment, an arc-shaped groove is provided on one side of the pressure sleeve, one end of the rubber sleeve abuts against the arc-shaped groove, and the other end of the rubber sleeve abuts against the outer wall of the pipe.

[0010] In the preferred embodiment, the diameter of the ventilation channel of the ventilator and the liquid storage cylinder is larger than that of the ventilation channel of the thin tube, and an air valve is provided on one side of the ventilator, which is connected to an air source through an air pipe.

[0011] In a preferred embodiment, a liquid separator is provided inside the liquid storage cylinder, which divides the bottom of the liquid storage cylinder into a liquid storage chamber, and a halogen detector is provided at the bottom of the liquid storage chamber.

[0012] In a preferred embodiment, the cooling device includes an outer cylinder wall, a serpentine tube inside the outer cylinder wall, a coolant inside the outer cylinder wall, an opening at the top of the outer cylinder wall, and a bottom passage pipe at the bottom of the outer cylinder wall.

[0013] In the preferred embodiment, activated carbon is provided at the opening of the outer cylinder wall, one end of the bottom pipe is connected to the serpentine pipe, and the other end of the bottom pipe is connected to the liquid storage cylinder.

[0014] In the preferred embodiment, a condenser is provided on one side of the cooling device, and both the inlet and outlet of the condenser are connected to the outer cylinder wall.

[0015] The beneficial effects of this invention are as follows: the boiling point of the evaporative cooling medium is low. Once a medium leak occurs at the pipe connection, the temperature around the connection will drop rapidly. At this time, the temperature of the temperature measuring resistor at the leak location will be significantly lower than that at other locations. Therefore, the thermometer can react in time, which can greatly improve the accuracy of the alarm. At the same time, by numbering the thermometers of the temperature measuring resistors at different connection locations, the leak location can be quickly located.

[0016] The gas valve supplies gas to the venting cylinder, allowing the gas to pass sequentially through the venting cylinder, the thin tube, the liquid storage cylinder, and the cooling device. Since the inner diameter of the venting pipe of the venting cylinder and the liquid storage cylinder is larger than the inner diameter of the thin tube, a negative pressure is formed in the connecting pipe. When decafluoropentane leaks, the decafluoropentane enters the thin tube from the connecting pipe, passes through the liquid storage cylinder from the thin tube, and then enters the cooling device.

[0017] When decafluoropentane enters the cooling device, the liquid decafluoropentane enters the serpentine tube. Due to gravity, the liquid decafluoropentane flows back to the storage chamber isolated by the liquid separator. The halogen detector reacts and alarms. The gaseous decafluoropentane, after being cooled by the serpentine tube, becomes liquid again and flows back to the storage chamber of the liquid storage cylinder. A small amount of gaseous decafluoropentane is adsorbed on the activated carbon at the opening, so that all leaked decafluoropentane is recovered and leakage is prevented.

[0018] The entire system can recover gaseous and liquid decafluoropentane. The thermometer, combined with a halogen detector, significantly improves alarm accuracy and avoids the risk of false alarms. It prevents long-term decafluoropentane leakage from affecting component sealing and lifespan, thus avoiding safety risks. Simultaneously, it prevents insufficient cooling medium, reduced heat dissipation efficiency, abnormally high temperatures in critical components, and potential equipment overheating, accelerated insulation aging, or even system shutdown due to prolonged leakage. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is an axonometric view of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is an axial view of the sleeve of this utility model; Figure 4 This is an axonometric view of a partial structure of this utility model; Figure 5 This is a sectional view of a partial structure of this utility model; Figure 6 This is a utility model Figure 5 A magnified view of A in the middle; In the diagram: Pipe 1; Sleeve 2; Ring 201; Pressure sleeve 202; Connecting plate 203; Arc groove 204; Rubber sleeve 3; Connecting pipe 4; Liquid storage cylinder 5; Liquid separator 501; Vent cylinder 6; Thin pipe 7; Cooling device 8; Outer cylinder wall 801; Serpentine pipe 802; Coolant 803; Opening 804; Bottom pipe 805; Flange 9; Flange hole 901; Bolt 10; Gas valve 11; Condenser 12; Thermometer 13; Activated carbon 14. Detailed Implementation

[0020] Example 1: like Figure 1-6The device for monitoring medium leakage in the evaporative cooling system of a generator set includes two pipes 1, with two sleeves 2 at the connection point of the two pipes 1. One sleeve 2 has a connecting pipe 4, and a thin tube 7 at the bottom of the connecting pipe 4. A vent cylinder 6 is connected to one side of the thin tube 7, and a liquid storage cylinder 5 is connected to the other side. A cooling device 8 is connected to one end of the liquid storage cylinder 5. A thermometer 13 is also installed on one of the sleeves 2. In this structure, the pipes of the cooler are generally connected by pipe clamps. This device replaces the pipe clamp connection with a flange 9 connection. Pipe clamp connections are easily affected by pressure and temperature changes, leading to leakage. The flange 9 can prevent leakage to a certain extent.

[0021] This device uses two sleeves 2 to wrap around the pipe 1, and two flanges 9 can be located inside the ring 201. The pressure sleeve 202 abuts against the pipe 1. The structure of the sleeve 2 can provide space for the flanges 9. The rubber sleeve 3 is elastic. One end of the rubber sleeve 3 is installed on the arc groove 204 so that the rubber sleeve 3 can be installed quickly and can also seal the sleeve 2 well. The structure of the sleeve 2 and the rubber sleeve 3 can enable the whole structure to be quickly installed at the connection of the two pipes 1.

[0022] The evaporative cooling medium has a low boiling point. Once a medium leak occurs at the connection of pipe 1, the temperature around the connection will drop rapidly. At this time, the temperature of the temperature measuring resistor at the leak location will be significantly lower than that at other locations. Therefore, the thermometer 13 can react in time, which can greatly improve the accuracy of the alarm. At the same time, by numbering the thermometers 13 at different connection locations, the leak location can be quickly located.

[0023] Gas valve 11 supplies gas to ventilator 6, so that the gas passes through ventilator 6, thin tube 7, liquid storage tank 5 and cooling device 8 in sequence. Since the inner diameter of the ventilator 6 and liquid storage tank 5 is larger than the inner diameter of thin tube 7, a negative pressure is formed in connecting pipe 4. When decafluoropentane leaks, decafluoropentane enters thin tube 7 from connecting pipe 4, and then enters cooling device 8 after passing through liquid storage tank 5 from thin tube 7.

[0024] When decafluoropentane enters the cooling device 8, the liquid decafluoropentane enters the serpentine tube 802. Due to gravity, the liquid decafluoropentane flows back to the storage chamber isolated by the liquid separator 501. The halogen detector 15 reacts and alarms. The gaseous decafluoropentane is cooled by the serpentine tube 802 and becomes liquid again, flowing back to the storage chamber of the liquid storage cylinder 5. A small amount of gaseous decafluoropentane is adsorbed on the activated carbon 14 at the opening 804, so that all the leaked decafluoropentane is recovered and leakage is avoided.

[0025] The entire device can recover gaseous and liquid decafluoropentane. The thermometer 13, in conjunction with the halogen detector 15, greatly improves alarm accuracy and avoids the risk of false alarms. It prevents long-term decafluoropentane leakage from affecting component sealing and service life, and avoiding safety risks. Simultaneously, it prevents prolonged leakage from causing insufficient cooling medium, reduced heat dissipation efficiency, abnormally high temperatures in critical unit components, leading to equipment overheating, accelerated insulation aging, and even shutdown failures.

[0026] In the preferred embodiment, the pipe 1 is provided with flanges 9, two flanges 9 abut together, and the flanges 9 are provided with multiple flange holes 901, with bolts 10 abutting against the flange holes 901. With this structure, In the preferred embodiment, two sleeves 2 enclose the connection between the two pipes 1. Each sleeve 2 includes a ring 201, with pressure sleeves 202 on both sides of the ring 201, and connecting plates 203 on both sides of the pressure sleeves 202. A second bolt connects the connecting plates 203 of the two sleeves 2. With this structure, the cooler's pipes are typically connected by clamps. This device replaces the clamp connection with a flange 9 connection. Clamp connections are susceptible to pressure and temperature changes, leading to leaks. The flange 9 can prevent leaks to some extent.

[0027] This device uses two sleeves 2 to wrap around the pipe 1, and two flanges 9 can be located inside the ring 201. The pressure sleeve 202 abuts against the pipe 1. The structure of the sleeve 2 can provide space for the flanges 9. The rubber sleeve 3 is elastic. One end of the rubber sleeve 3 is installed on the arc groove 204 so that the rubber sleeve 3 can be installed quickly and can also seal the sleeve 2 well. The structure of the sleeve 2 and the rubber sleeve 3 can enable the whole structure to be quickly installed at the connection of the two pipes 1.

[0028] In the preferred embodiment, the flange 9 and multiple bolts 10 are located inside the annular sleeves 201 of the two sleeves 2, and the pressure sleeve 202 abuts against the outer wall of the pipe 1.

[0029] In the preferred embodiment, an arc-shaped groove 204 is provided on one side of the pressure sleeve 202. One end of the rubber sleeve 3 abuts against the arc-shaped groove 204, and the other end of the rubber sleeve 3 abuts against the outer wall of the pipe 1. With this structure, since the normal operating pressure of the evaporative cooling system is very small, only about 0.02 MPa, and will not exceed 0.06 MPa at most, the pressure of the medium leaking from the connection is even smaller. Therefore, the elasticity of the rubber sleeve 3 can reliably seal the leaked medium inside the sleeve 2.

[0030] In the preferred embodiment, the diameter of the ventilation channel of the vent cylinder 6 and the liquid storage cylinder 5 is larger than that of the ventilation channel of the thin tube 7. A valve 11 is provided on one side of the vent cylinder 6, and the valve 11 is connected to an air source via an air pipe. With this structure, the valve 11 is connected to the air source via a pipe, and the normal operating pressure of the evaporative cooling system is very low, only about 0.02 MPa, and will not exceed 0.06 MPa at most. The pressure of the medium leaking from the connection point is even lower, so that the amount of gas output by the valve 11 is extremely small, thus preventing a large amount of energy waste in the overall device.

[0031] The gas source can be directly connected to the low-pressure gas storage tank in the plant via a pipeline; the diameter of the thin tube 7 is relatively small, and according to Bernoulli's principle, the gas flow rate here will be accelerated, generating negative pressure; once a leak occurs at the connection of the pipeline, the leaking medium will flow rapidly into the cooling device 8 under the influence of negative pressure.

[0032] In a preferred embodiment, the liquid storage cylinder 5 is equipped with a liquid separator 501, which divides the bottom of the liquid storage cylinder 5 into a liquid storage chamber. A halogen detector 15 is installed at the bottom of the liquid storage chamber. With this structure, the halogen detector 15 is used for alarm purposes, and the recovered liquid enters the liquid storage chamber divided at the bottom of the liquid storage cylinder 5.

[0033] In a preferred embodiment, the cooling device 8 includes an outer cylinder wall 801, a serpentine tube 802 inside the outer cylinder wall 801, a coolant 803 disposed in the outer cylinder wall 801, an opening 804 at the top of the outer cylinder wall 801, and a bottom passage pipe 805 at the bottom of the outer cylinder wall 801. With this structure, when decafluoropentane leaks, the decafluoropentane enters the thin tube 7 from the connecting pipe 4, and then enters the cooling device 8 after passing through the liquid storage cylinder 5 from the thin tube 7.

[0034] When decafluoropentane enters the cooling device 8, the liquid decafluoropentane enters the serpentine tube 802. Due to gravity, the liquid decafluoropentane flows back to the storage chamber isolated by the liquid separator 501. The halogen detector 15 reacts and alarms. The gaseous decafluoropentane is cooled by the serpentine tube 802 and becomes liquid again, flowing back to the storage chamber of the liquid storage cylinder 5. A small amount of gaseous decafluoropentane is adsorbed on the activated carbon 14 at the opening 804, so that all the leaked decafluoropentane is recovered and leakage is avoided.

[0035] In the preferred embodiment, activated carbon 14 is provided at the opening 804 of the outer cylinder wall 801, one end of the bottom pipe 805 is connected to the serpentine pipe 802, and the other end of the bottom pipe 805 is connected to the liquid storage cylinder 5.

[0036] In a preferred embodiment, a condenser 12 is provided on one side of the cooling device 8, and both the inlet and outlet of the condenser 12 are connected to the outer cylinder wall 801. With this structure, both the inlet and outlet of the condenser 12 are connected to the outer cylinder wall 801. A second thermometer is provided inside the outer cylinder wall 801. When the temperature of the coolant 803 inside the outer cylinder wall 801 is too high, the condenser 12 is activated to lower the temperature of the coolant 803.

[0037] The evaporative cooling system includes a lower liquid collection ring pipe, an upper gas collection pipe, an upper guide pipe, and a return liquid pipe. Decafluoropentane has a boiling point of approximately 55°C. When decafluoropentane moves through the evaporative cooling system, it is generally in a gaseous state when it reaches the upper part of the system and in a liquid state when it reaches the lower upper part. In the event of a decafluoropentane leak, it may be in a gaseous, liquid, or gas-liquid mixture.

[0038] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A device for monitoring medium leakage in the evaporative cooling system of a generator set, characterized in that: It includes two pipes (1), and two sleeves (2) are provided at the connection of the two pipes (1). One of the sleeves (2) is provided with a connecting pipe (4). The bottom of the connecting pipe (4) is provided with a thin pipe (7). A ventilator (6) is provided on one side of the thin pipe (7), and a liquid storage cylinder (5) is provided on the other side of the thin pipe (7). A cooling device (8) is provided at one end of the liquid storage cylinder (5). A thermometer (13) is provided on one of the sleeves (2).

2. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 1, characterized in that: The pipe (1) is provided with flanges (9), two flanges (9) abut together, and multiple flange holes (901) are provided on the flanges (9), and bolts (10) abut against the flange holes (901).

3. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 1, characterized in that: Two sleeves (2) wrap around the connection of two pipes (1). The sleeve (2) includes a ring sleeve (201), and pressure sleeves (202) are provided on both sides of the ring sleeve (201). Connecting plates (203) are provided on both sides of the pressure sleeves (202). The second bolt connects the connecting plates (203) of the two sleeves (2).

4. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 3, characterized in that: flange (9) and multiple bolts (10) are located inside the annulus (201) of the two sleeves (2), and the pressure sleeve (202) abuts against the outer wall of the pipe (1).

5. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 3, characterized in that: The pressure sleeve (202) has an arc groove (204) on one side. One end of the rubber sleeve (3) abuts against the arc groove (204), and the other end of the rubber sleeve (3) abuts against the outer wall of the pipe (1).

6. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 1, characterized in that: The ventilation channel diameter of the ventilation cylinder (6) and the liquid storage cylinder (5) is larger than that of the ventilation channel of the thin tube (7). A gas valve (11) is provided on one side of the ventilation cylinder (6), and the gas valve (11) is connected to the air source through the gas pipe.

7. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 1, characterized in that: The liquid storage cylinder (5) is equipped with a liquid separator (501), which separates the bottom of the liquid storage cylinder (5) into a liquid storage chamber. A halogen detector (15) is installed at the bottom of the liquid storage chamber.

8. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 1, characterized in that: The cooling device (8) includes an outer cylinder wall (801), a serpentine tube (802) inside the outer cylinder wall (801), a coolant (803) in the outer cylinder wall (801), an opening (804) at the top of the outer cylinder wall (801), and a bottom pipe (805) at the bottom of the outer cylinder wall (801).

9. The device for monitoring medium leakage in the evaporative cooling system of a generator set according to claim 8, characterized in that: Activated carbon (14) is provided at the opening (804) of the outer cylinder wall (801). One end of the bottom pipe (805) is connected to the serpentine pipe (802), and the other end of the bottom pipe (805) is connected to the liquid storage cylinder (5).

10. The device for monitoring medium leakage in an evaporative cooling system of a generator set according to claim 8, characterized in that: A condenser (12) is provided on one side of the cooling device (8), and the inlet and outlet of the condenser (12) are connected to the outer cylinder wall (801).

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