Condenser vacuum monitoring system with vacuum indication not easy to drift and jump

Abstract

The utility model relates to a condenser vacuum monitoring system which is not easy to drift and jump in vacuum indication. Vacuum indication of an existing condenser vacuum monitoring device is prone to drifting and even jumping. Therefore, the condenser vacuum monitoring system with the vacuum indication not prone to drifting and jumping comprises a condenser, a pressure guiding pipe and a vacuum monitoring device, one end of the pressure guiding pipe is communicated with the top of the condenser, the other end of the pressure guiding pipe is communicated with the vacuum monitoring device, and the condenser vacuum monitoring system further comprises a drain tank and a water return pipe. The two ends of the upper-section pipe are connected with the vacuum monitoring device and the top of the drain tank respectively, the two ends of the lower-section pipe are communicated with the upper portion of the drain tank and the top of the condenser respectively, the lower end of the water return pipe is communicated with the bottom of the condenser, and the top end of the water return pipe is communicated with the bottom of the drain tank. The device is simple in structure and reliable in use, is used for monitoring the vacuum of the condenser, is not liable to drift and jump in vacuum indication, and is suitable for thermal power plants.

Description

Technical Field

[0001] This utility model relates to a condenser vacuum monitoring system with a vacuum indicator that is not easily drifted or abruptly changed. Background Technology

[0002] In the thermodynamic cycle of modern large-scale power plant condensing steam turbine units, the condenser acts as a cold source, its main task being to condense the turbine exhaust steam into water and establish and maintain a certain vacuum at the turbine exhaust port. During power plant production, the accuracy of the turbine vacuum parameters directly affects the safe and economical operation of the unit. Therefore, selecting a suitable sampling scheme for condenser vacuum measurement is crucial for accurately and reliably monitoring changes in the unit's vacuum.

[0003] Existing condenser vacuum monitoring systems include a condenser, a pressure tap, and a vacuum monitoring device. One end of the pressure tap is connected to the top of the condenser, and the other end is connected to the vacuum monitoring device. During use, vacuum indication drift and even jumps frequently occur. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to overcome the above-mentioned defects of the prior art and provide a condenser vacuum monitoring system that is not easy to drift or jump in vacuum indication.

[0005] To solve the above-mentioned technical problems, this condenser vacuum monitoring system, which is not prone to drift or jumps in vacuum indication, includes a condenser, a pressure tapping pipe, and a vacuum monitoring device. One end of the pressure tapping pipe is connected to the top of the condenser, and the other end is connected to the vacuum monitoring device. Its key feature is that it also includes a condensate trap and a return water pipe. The pressure tapping pipe is divided into an upper section and a lower section. The two ends of the upper section are connected to the vacuum monitoring device and the top of the condensate trap, respectively. The two ends of the lower section are connected to the upper part of the condensate trap and the top of the condenser, respectively. The lower end of the return water pipe is connected to the bottom of the condenser, and the upper end is connected to the bottom of the condensate trap. A one-way condensate valve is also provided on the return water pipe. This one-way condensate valve includes a valve tube, a spherical valve core, a helical spring, and a hollow cap. The valve tube, from top to bottom, consists of a small-diameter section, a tapered section, and a large-diameter section. The hollow cap is screwed onto the lower end of the valve tube. The spherical valve core and the helical spring are... The coil spring is placed inside the valve tube. The lower end of the coil spring presses against the hollow cap, and the top of the coil spring abuts against the spherical valve core, causing the spherical valve core to block the conical tube section. The diameter of the small end of the conical tube section is less than the diameter of the spherical valve core, which is less than the diameter of the large end of the conical tube section. The top of the valve tube is connected to the return water pipe above it, and the hollow cap is connected to the return water pipe below it. The one-way steam trap is higher than the condenser. When the condensate in the steam trap reaches half its capacity, the water pressure of the condensate in the one-way steam trap and the return water pipe below it is sufficient to push open the spherical valve core, causing the one-way steam trap to open. The condensate flows back to the condenser through the return water pipe and the one-way steam trap. When the condensate in the steam trap is drained, and the distance between the top of the one-way steam trap and the condensate liquid level in the return water pipe above it is less than 8 cm, the rebound force of the coil spring is sufficient to push the spherical valve core, blocking the conical tube section and causing the one-way steam trap to close.

[0006] Through careful research, the inventors discovered that when the vacuum indicator drifts or even jumps, disassembling the pressure tapping pipe reveals a small amount of condensate inside. To address this, the inventors added a condensate trap and a one-way steam trap to the pressure tapping pipe. During operation, condensate accumulates in the return pipe above the one-way steam trap and in the condensate trap. When the accumulated condensate in the condensate trap reaches a certain level, the one-way steam trap opens, and the condensate flows back to the condenser through the return pipe. When the condensate level in the return pipe drops to a certain level, the helical spring rebounds, and the one-way steam trap closes. This design ensures that the condensate in the pressure tapping pipe is promptly separated.

[0007] As an optimization, there are two lower section pipes, each equipped with a valve. This design, with two lower section pipes between the condensate tank and the condenser, provides good pressure-pressurizing effect.

[0008] As an optimization, the top of the condensate tank is also equipped with a secondary pressure tap, which is connected to a vacuum pressure gauge and a vacuum pressure sensor. This design facilitates on-site observation of the condenser vacuum pressure.

[0009] This condenser vacuum monitoring system, with its simple structure and reliable operation, is designed to monitor condenser vacuum. The vacuum indication is resistant to drift and sudden changes, making it suitable for use in thermal power plants. Attached Figure Description

[0010] The following description, in conjunction with the accompanying drawings, further illustrates this practical condenser vacuum monitoring system, which is characterized by its stable and non-abrupt vacuum indication:

[0011] Figure 1 This is a partial cross-sectional structural diagram of the condenser vacuum monitoring system, which is designed to prevent the vacuum indicator from drifting or changing drastically.

[0012] In the diagram: 1 is the condenser, 2 is the pressure tapping pipe, 21 is the upper section pipe, 22 is the lower section pipe, 3 is the vacuum monitoring device, 4 is the condensate trap, 5 is the return water pipe, 6 is the valve pipe, 61 is the small diameter section, 62 is the tapered pipe section, 63 is the large diameter section, 7 is the spherical valve core, 8 is the helical spring, 9 is the hollow sealing cap, 10 is the one-way condensate trap, 11 is the valve, 12 is the auxiliary pressure tapping pipe, 13 is the vacuum pressure gauge, 14 is the vacuum pressure sensor, and 15 is the sealing ring. Detailed Implementation

[0013] Implementation method one: such as Figure 1As shown, this condenser vacuum monitoring system, characterized by its stable and non-drifting vacuum indication, includes a condenser 1, a pressure tapping pipe 2, and a vacuum monitoring device 3. One end of the pressure tapping pipe 1 is connected to the top of the condenser 1, and the other end is connected to the vacuum monitoring device 3. Its distinguishing feature is that it further includes a condensate drain tank 4 and a return water pipe 5. The pressure tapping pipe 2 is divided into an upper section 21 and a lower section 22. The two ends of the upper section 21 are respectively connected to the vacuum monitoring device 3 and the top of the condensate drain tank 4, and the two ends of the lower section 22 are respectively connected to the condensate drain tank 4. The upper part and the top of the condenser 1, the lower end of the return water pipe 5 is connected to the bottom of the condenser 1, the upper end of the return water pipe 5 is connected to the bottom of the steam trap 4, and the return water pipe 5 is also equipped with a one-way steam trap 10. The one-way steam trap 10 includes a valve pipe 6, a ball valve core 7, a helical spring 8 and a hollow cap 9. The valve pipe 6 is divided into a small diameter section 61, a tapered section 62 and a large diameter section 63 from top to bottom. The hollow cap 9 is provided with an internal thread, and the lower part of the valve pipe 6 is provided with a corresponding external thread. The hollow cap 9 is screwed onto the lower end of the valve pipe 6. A spherical valve core 7 and a helical spring 8 are disposed inside the valve tube 6. The lower end of the helical spring 8 presses against the hollow cap 9, and the top end of the helical spring 8 abuts against the spherical valve core 7, causing the spherical valve core 7 to block the conical tube section 62. The diameter of the small end of the conical tube section 62 is less than the diameter of the spherical valve core 7, which is less than the diameter of the large end of the conical tube section 62. The top end of the valve tube 61 is connected to the return water pipe 5 above it, and the hollow cap 9 is connected to the return water pipe 5 below it. The one-way steam trap is higher than the condenser 1. When the condensate in the steam trap 4 accumulates to half the height of the steam trap 4... At one capacity, the water pressure of the condensate in the one-way steam trap 10 and the return water pipe 5 below it is sufficient to push open the ball valve core 7, causing the one-way steam trap 10 to open. The condensate flows back to the condenser 1 through the return water pipe 5 and the one-way steam trap 10. When the condensate in the steam trap 4 is drained and the distance between the top of the one-way steam trap 10 and the condensate liquid level in the return water pipe 5 above is less than 8 cm, the rebound force of the helical spring 8 is sufficient to push the ball valve core 7, which blocks the cone tube 62, causing the one-way steam trap 10 to close.

[0014] There are two lower pipes 22, each equipped with a valve 11. The top of the condensate tank 4 is also equipped with a secondary pressure pipe 12, which is connected to a vacuum pressure gauge 13 and a vacuum pressure sensor 14.

Claims

1. A condenser vacuum monitoring system with a vacuum indicator that is not easily drifted or abruptly changed, comprising a condenser, a pressure tap, and a vacuum monitoring device, wherein one end of the pressure tap is connected to the top of the condenser, and the other end is connected to the vacuum monitoring device, characterized in that: It also includes a condensate tank and a return pipe. The pressure pipe is divided into an upper section and a lower section. The two ends of the upper section are connected to the vacuum monitoring device and the top of the condensate tank, respectively. The two ends of the lower section are connected to the upper part of the condensate tank and the top of the condenser, respectively. The lower end of the return pipe is connected to the bottom of the condenser, and the upper end of the return pipe is connected to the bottom of the condensate tank. The return pipe is also equipped with a one-way condensate valve, which includes a valve tube, a spherical valve core, a helical spring, and a hollow cap. The valve tube consists of a small-diameter section, a tapered section, and a large-diameter section from top to bottom. The hollow cap is screwed onto the lower end of the valve tube. The spherical valve core and the helical spring are disposed inside the valve tube. The lower end of the helical spring presses against the hollow cap, and the upper end of the helical spring abuts against the spherical valve core, causing the spherical valve core to block the tapered section. The conical tube section has a small end diameter smaller than the spherical valve core diameter smaller than the large end diameter. The top of the valve tube is connected to the return water pipe above it, and the hollow cap is connected to the return water pipe below it. The one-way steam trap is higher than the condenser. When the condensate in the steam trap reaches half its capacity, the water pressure of the condensate in the one-way steam trap and the return water pipe below it is sufficient to push open the spherical valve core, causing the one-way steam trap to open. The condensate flows back to the condenser through the return water pipe and the one-way steam trap. When the condensate in the steam trap is drained and the distance between the top of the one-way steam trap and the condensate liquid level in the return water pipe above it is less than 8 cm, the rebound force of the helical spring is sufficient to push the spherical valve core, blocking the conical tube section and causing the one-way steam trap to close.

2. The condenser vacuum monitoring system with vacuum indication that is not easily drifted or abruptly changed according to claim 1, characterized in that: There are two lower pipe sections, each equipped with a valve.

3. The condenser vacuum monitoring system with vacuum indication that is not easily drifted or abruptly changed according to claim 1, characterized in that: The top of the hydrophobic tank is also equipped with a secondary pressure pipe, which is connected to a vacuum pressure gauge and a vacuum pressure sensor.

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