Hydrogen purity measuring device for hydrogen-cooled generator

Abstract

The utility model discloses a hydrogen purity measuring device for hydrogen cooling generator belongs to hydrogen cooling generator accessory technical field, including the inner cooling water tank, the inner cooling water tank top is provided with the mounting hole, the mounting hole inside fixedly connected with the sealed connecting piece, sampling measurement mechanism, sampling measurement mechanism includes a plurality of sampling tubes, a plurality of sampling tubes's middle part all with sealed connecting piece through fixed connection, one end all stretches into the inner top of inner cooling water tank, and the other end is connected with same current -collecting main pipe. The utility model discloses through setting up a plurality of sampling tubes, multi -point site pertinence sampling, eliminates the detection blind area, and sampling tube stretches into the inner top of inner cooling water tank, and covers the edge corner dead angle, hydrogen gas air inlet nearby, inner cooling water exhaust port nearby etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrogen-cooled generator accessories, and in particular relates to a hydrogen purity measuring device for hydrogen-cooled generators. Background Technology

[0002] The hydrogen-cooled generator set adopts a dual-cooling system of water and hydrogen. The rotor relies on hydrogen for heat dissipation, while the stator is cooled by cooling water. To prevent insulation damage caused by leakage in the stator water system, the hydrogen pressure in the upper layer of the internal cooling water tank must be maintained higher than the water pressure in the lower layer of cooling water during normal operation. During operation, the purity of the hydrogen in the upper layer of the internal cooling water tank needs to be monitored in real time to ensure the safe operation of the unit and the reasonable emission of hydrogen.

[0003] In existing technologies, a single-point sampling point for hydrogen in the internal cooling water pipe is used with a single-inlet pipe. This method cannot cover areas such as the corners of the internal cooling water tank and the gas supply port, which can easily lead to blind spots in detection. On the other hand, multi-pipe sampling requires multiple holes to be opened on the internal cooling water tank, which increases the risk of sealing and can easily lead to leakage due to hydrogen corrosion or unit vibration. Utility Model Content

[0004] The purpose of this invention is to propose a hydrogen purity measuring device for hydrogen-cooled generators, in order to solve the problem that the traditional technology uses a single-point sampling method for hydrogen in the internal cooling water pipe, which cannot cover areas such as the corners of the internal cooling water tank and the gas inlet, and is prone to detection blind spots.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A hydrogen purity measuring device for a hydrogen-cooled generator, comprising: An internal cooling water tank is provided with an installation hole on its top, and a sealing connector is fixedly connected inside the installation hole; The sampling and measurement mechanism includes multiple sampling tubes, each of which is fixedly connected to a sealing connector at its middle. One end of each sampling tube extends into the top of the inner cold water tank, and the other end is connected to the same main manifold. A branch valve is installed at the end of each sampling tube extending out of the inner cold water tank. A three-way valve is installed on the main manifold. The two ports of the three-way valve away from the main manifold are respectively connected to a measuring tube and a venting assembly. The end of the measuring tube away from the main manifold is sequentially connected to a main valve and a hydrogen purity analyzer.

[0006] Preferably, the sealing connector includes a pipe seat fixedly connected inside the mounting hole. The bottom of the pipe seat communicates with the interior of the inner cold water tank, and a sealing cover is fixedly connected to its top. An annular sealing gasket is provided between the pipe seat and the sealing cover. The sealing cover has multiple through holes, and multiple sampling tubes are fixedly connected to the multiple through holes one by one.

[0007] Preferably, a sealing groove is provided inside the through hole, and a rubber ring is fixedly connected inside the sealing groove, with the inner side of the rubber ring sealingly abutting against the outer side of the sampling tube.

[0008] Preferably, one end of each of the sampling tubes extends into the inner cold water tank and is distributed along different areas of the top of the inner cold water tank, and each tube is equipped with a filter screen. The end of the tube extending out of the inner cold water tank is connected to the main manifold via a compression fitting.

[0009] Preferably, the venting assembly includes a venting pipe connected to a three-way valve, with a filter, an air pump, and a venting valve sequentially connected to the end of the venting pipe away from the three-way valve. The air pump's suction end faces the filter, and its exhaust end faces the venting valve.

[0010] Preferably, a first check valve is installed on the measuring tube between the main valve and the hydrogen purity analyzer, with the first check valve having a unidirectional flow direction from the main valve toward the hydrogen purity analyzer, and a second check valve is installed on the venting pipe between the three-way valve and the filter, with the second check valve having a unidirectional flow direction from the three-way valve toward the gas pump.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model eliminates detection blind spots by setting up multiple sampling tubes for targeted sampling at multiple points. The sampling tubes extend into one end of the inner cooling water tank, covering areas where hydrogen concentration is prone to unevenness, such as corners, near hydrogen inlet, and near inner cooling water outlet. This comprehensively captures the concentration distribution differences of upper hydrogen in the inner cooling water tank, avoiding measurement deviations caused by local gas unevenness, and providing a more accurate basis for hydrogen purity control of hydrogen-cooled generators. By setting up a sealing connection, consisting of a pipe seat and a sealing cover, all sampling tubes pass through only one mounting hole at the top of the inner cooling water tank. Compared with the traditional one-pipe-one-hole design, this significantly reduces the number of openings and avoids the cumulative risk of seal failure caused by multiple openings.

[0012] 2. This utility model, by setting up a venting component, uses an air pump to quickly expel residual gas in the manifold and sampling tube through active air extraction, shortening the venting time, removing residual hydrogen in the pipeline, and avoiding reading distortion caused by its mixing with fresh sampling gas; at the same time, it increases the speed at which fresh sampling gas fills the sampling tube and manifold, further improving the hydrogen purity measurement rate.

[0013] 3. This utility model equips each sampling tube with an independent branch valve, which can quickly locate the fault by opening a branch valve individually and observing the reading of the hydrogen purity analyzer. If the reading does not respond or rises slowly, it can be determined that the sampling tube is blocked; if the detected hydrogen purity drops sharply, it can be determined that the tube is leaking. Compared with the traditional multi-tube shared passage design, the fault can be checked without disassembling the entire gas circuit. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a hydrogen purity measuring device for a hydrogen-cooled generator proposed in this utility model. Figure 2 This is a vertical sectional view of the internal cooling water tank of a hydrogen purity measuring device for a hydrogen-cooled generator proposed in this utility model. Figure 3 for Figure 2 Enlarged diagram of part A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of part B in the middle.

[0015] In the diagram: 1. Internal cooling water tank, 2. Connecting pipe seat, 3. Sealing cap, 4. Through hole, 5. Rubber ring, 6. Sampling tube, 7. Filter screen, 8. Dividing valve, 9. Compression fitting, 10. Manifold main pipe, 11. Three-way valve, 12. Measuring tube, 13. Main valve, 14. First check valve, 15. Hydrogen purity analyzer, 16. Drain pipe, 17. Second check valve, 18. Filter, 19. Air pump, 20. Drain valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-4 A hydrogen purity measuring device for a hydrogen-cooled generator, comprising: The internal cooling water tank 1 has an installation hole on its top, and a sealing connector is fixedly connected inside the installation hole.

[0018] The sealing connector includes a pipe seat 2 fixedly connected inside the mounting hole. The bottom of the pipe seat 2 communicates with the interior of the inner cold water tank 1, and a sealing cover 3 is fixedly connected to its top. An annular sealing gasket is provided between the pipe seat 2 and the sealing cover 3. Multiple through holes 4 are provided on the sealing cover 3.

[0019] The sampling and measurement mechanism includes multiple sampling tubes 6, the middle of which is fixedly connected to a sealing connector. One end of each sampling tube 6 extends into the top of the inner cold water tank 1, and the other end is connected to the same main manifold 10. The multiple sampling tubes 6 are fixedly connected to multiple through holes 4 one by one.

[0020] Multiple sampling tubes 6 extend into the inner cold water tank 1, with one end distributed along different areas of the top of the inner cold water tank 1, and each is equipped with a filter screen 7. The end of each tube extending out of the inner cold water tank 1 is connected to the manifold 10 by a compression fitting 9.

[0021] Some sampling tubes 6 extend into one end of the inner cooling water tank 1 and are distributed in the corners and dead corners of the inner cooling water tank 1, near the hydrogen gas supply port and near the inner cooling water exhaust port, so as to achieve comprehensive detection of the hydrogen concentration in the upper layer inside the inner cooling water tank 1.

[0022] A sealing groove is provided inside the through hole 4, and a rubber ring 5 is fixedly connected inside the sealing groove. The inner side of the rubber ring 5 seals against the outer side of the sampling tube 6, thereby improving the sealing performance between the through hole 4 and the sampling tube 6.

[0023] The sealing connector consisting of the connector 2 and the sealing cap 3 allows multiple sampling tubes 6 to extend from the mounting hole. Compared to opening multiple holes for multiple sampling tubes 6 to pass through, this reduces the sealing difficulty of the internal cooling water tank 1 and improves the working stability of the internal cooling water tank 1.

[0024] Multiple sampling tubes 6 are each equipped with a branch valve 8 at one end extending from the inner cooling water tank 1. A three-way valve 11 is installed on the main manifold 10. The two ports of the three-way valve 11 away from the main manifold 10 are respectively connected to the measuring tube 12 and the venting assembly. The end of the measuring tube 12 away from the main manifold 10 is connected in sequence to the main valve 13 and the hydrogen purity analyzer 15.

[0025] The hydrogen purity analyzer 15 uses existing technology to detect the purity of incoming hydrogen.

[0026] The venting assembly includes a venting pipe 16 connected to a three-way valve 11. The end of the venting pipe 16 away from the three-way valve 11 is connected in sequence to a filter 18, an air pump 19 and a venting valve 20. The air pump 19 has its suction end facing the filter 18 and its exhaust end facing the venting valve 20.

[0027] The gas pump 19 is an explosion-proof miniature diaphragm pump, which is suitable for hydrogen medium. When it is working, it extracts the residual hydrogen inside the sampling tube 6 and the manifold 10 through the vent pipe 16 to avoid the residual hydrogen affecting the accuracy of hydrogen purity detection.

[0028] The filter 18 uses existing technology to filter impurities and prevent them from affecting the internal components of the air pump 19.

[0029] A first check valve 14 is installed on the measuring tube 12 between the main valve 13 and the hydrogen purity analyzer 15. The first check valve 14 has a unidirectional flow direction from the main valve 13 toward the hydrogen purity analyzer 15. A second check valve 17 is installed on the venting tube 16 between the three-way valve 11 and the filter 18. The second check valve 17 has a unidirectional flow direction from the three-way valve 11 toward the gas pump 19.

[0030] The first one-way valve 14 protects the measurement accuracy of the hydrogen purity analyzer 15 and prevents gas backflow and contamination, while the second one-way valve 17 ensures the safety of the venting passage and prevents external air backflow.

[0031] The gas discharged from the vent pipe 16 is treated by a subsequent gas treatment device in the prior art before being discharged.

[0032] When measuring hydrogen purity, first close all branch valves 8, main valve 13, and vent valve 20, stop the air pump 19, switch the three-way valve 11 to the vent assembly state, open all branch valves 8 that need to be sampled, so that the gas inside the internal cooling water tank 1 enters multiple sampling tubes 6 and the manifold 10, open the vent valve 20, start the air pump 19, and the residual hydrogen inside the manifold 10 and multiple sampling tubes 6 is discharged through the three-way valve 11, the second one-way valve 17, the filter 18, the air pump 19, and the vent valve 20, completing the synchronous venting operation of the manifold 10 and all sampling tubes 6.

[0033] After purging, turn off the air pump 19, purging valve 20, and branch valve 8. Switch the three-way valve 11 to the state of connecting to the measuring tube 12. Confirm that the first one-way valve 14 and the main valve 13 are in the closed state. Open the corresponding branch valve 8 and slowly open the main valve 13. The hydrogen gas inside the internal cooling water tank 1 enters the hydrogen purity analyzer 15 through the sampling tube 6, the manifold 10, the three-way valve 11, the measuring tube 12, the main valve 13, and the first one-way valve 14. After the reading of the hydrogen purity analyzer 15 stabilizes, record the hydrogen purity data. Then close the main valve 13 and the branch valve 8. If it is necessary to test other points, open the corresponding branch valve 8 and the main valve 13 to repeat the measurement.

[0034] By opening a single branch valve 8 and slowly opening the main valve 13, if the hydrogen purity analyzer 15 has no reading or the reading rises abnormally slowly, the sampling tube 6 may be blocked, preventing normal gas flow. If the hydrogen purity analyzer 15 detects a sudden drop in hydrogen purity, the sampling tube 6 may be leaking, causing outside air to mix in. This allows for quick location of the faulty sampling tube 6, preventing a problem with a single sampling tube 6 from affecting the overall measurement accuracy.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydrogen purity measuring device for a hydrogen-cooled generator, characterized in that, include: An internal cooling water tank (1) is provided with an installation hole on the top of the internal cooling water tank (1), and a sealing connector is fixedly connected inside the installation hole; The sampling and measurement mechanism includes multiple sampling tubes (6), the middle of which is fixedly connected to a sealing connector. One end of each sampling tube (6) extends into the top of the inner cold water tank (1), and the other end is connected to the same manifold (10). A branch valve (8) is installed at the end of each sampling tube (6) extending out of the inner cold water tank (1). A three-way valve (11) is installed on the manifold (10). The two ports of the three-way valve (11) away from the manifold (10) are respectively connected to a measuring tube (12) and a venting component. The end of the measuring tube (12) away from the manifold (10) is connected in sequence to a main valve (13) and a hydrogen purity analyzer (15).

2. The hydrogen purity measuring device for a hydrogen-cooled generator according to claim 1, characterized in that, The sealing connector includes a pipe seat (2) fixedly connected inside the mounting hole. The bottom of the pipe seat (2) is connected to the interior of the inner cold water tank (1), and a sealing cover (3) is fixedly connected to its top. An annular sealing gasket is provided between the pipe seat (2) and the sealing cover (3). Multiple through holes (4) are opened on the sealing cover (3), and multiple sampling tubes (6) are fixedly connected to the multiple through holes (4) one by one.

3. The hydrogen purity measuring device for a hydrogen-cooled generator according to claim 2, characterized in that, A sealing groove is provided inside the through hole (4), and a rubber ring (5) is fixedly connected inside the sealing groove. The inner side of the rubber ring (5) is sealed against the outer side of the sampling tube (6).

4. The hydrogen purity measuring device for a hydrogen-cooled generator according to claim 1, characterized in that, Multiple sampling tubes (6) are distributed along different areas of the top of the inner cold water tank (1) with one end extending into the inner cold water tank (1), and each is equipped with a filter screen (7). The end of the tube extending out of the inner cold water tank (1) is connected to the manifold (10) by a compression fitting (9).

5. The hydrogen purity measuring device for a hydrogen-cooled generator according to claim 1, characterized in that, The venting assembly includes a venting pipe (16) connected to a three-way valve (11). The end of the venting pipe (16) away from the three-way valve (11) is connected in sequence to a filter (18), an air pump (19), and a venting valve (20). The air pump (19) has its suction end facing the filter (18) and its exhaust end facing the venting valve (20).

6. The hydrogen purity measuring device for a hydrogen-cooled generator according to claim 5, characterized in that, A first check valve (14) is installed on the measuring tube (12) between the main valve (13) and the hydrogen purity analyzer (15). The first check valve (14) has a unidirectional flow direction from the main valve (13) toward the hydrogen purity analyzer (15). A second check valve (17) is installed on the venting tube (16) between the three-way valve (11) and the filter (18). The second check valve (17) has a unidirectional flow direction from the three-way valve (11) toward the gas pump (19).

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