Condenser heat exchange tube leak detection device

Abstract

The utility model provides a condenser heat exchange tube leak detection device which comprises a first sealing cover, a second sealing cover and a negative pressure device, the first sealing cover and the second sealing cover are arranged at the two ends of a condenser in a sealing and covering mode, and the negative pressure device is communicated with the first sealing cover; a first mounting plate is arranged in the first sealing cover, a plurality of detection pipes are arranged on the first mounting plate in an array mode, the detection pipes are in butt joint with a plurality of heat exchange pipes in the condenser one by one, and airflow detection pieces are arranged on the detection pipes. The first sealing cover and the second sealing cover are both made of light-transmitting materials, and the detection tube is made of light-transmitting materials. The airflow detection piece is feathers, and the feathers are arranged in the detection pipe; the problems that according to an existing detection method, the leakage detection precision is poor, time consumed for finding leakage points is long, the detection result is influenced due to mutual influence between adjacent heat exchange tubes, and the cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of condenser detection equipment, in particular to a condenser heat exchange tube leakage detection device. Background Art

[0002] The condenser is an important auxiliary equipment of the steam turbine. It condenses the exhaust steam of the steam turbine into water to ensure the complete steam-water cycle and establish and maintain the vacuum. If the heat exchange tube inside the condenser is damaged or leaking, it will seriously affect the quality of the condensate, especially for seawater cooling condensers. Seawater entering the condensate system will cause serious damage to various equipment along the water supply pipeline.

[0003] When a heat exchange tube leaks, it is necessary to find the leak point in time and block the tube. At present, the main leak detection methods for condenser heat exchange tubes include thin film method, candle method, foam method, helium mass spectrometry, eddy current flaw detection, etc. The first three detection methods have poor leak detection accuracy, take a long time to find the leak point, and there are problems such as mutual influence between adjacent heat exchange tubes that affect the detection results. The latter two detection costs are relatively high. Utility Model Content

[0004] The utility model aims to provide a condenser heat exchange tube leak detection device, which solves the problems of poor leak detection accuracy of existing detection methods, long time consumption to find the leak point, mutual influence between adjacent heat exchange tubes affecting the detection results, and high cost.

[0005] The embodiment of the utility model is realized by the following technical scheme: a condenser heat exchange tube leakage detection device, comprising a first sealing cover, a second sealing cover and a negative pressure device, wherein the first sealing cover and the second sealing cover are arranged at both ends of the condenser, and the negative pressure device is connected to the first sealing cover;

[0006] A first mounting plate is arranged in the first sealing cover, and a plurality of detection tubes are arranged in an array on the first mounting plate. The detection tubes are connected to a plurality of heat exchange tubes in the condenser one by one, and airflow detection components are arranged on the detection tubes.

[0007] Furthermore, the first sealing cover and the second sealing cover are both made of light-transmitting materials.

[0008] Furthermore, the airflow detection member is a feather, and the feather is arranged in the detection tube.

[0009] Furthermore, a second mounting plate is arranged in the second sealing cover, and a plurality of sealing plugs are arranged in an array on the second mounting plate, and the plurality of sealing plugs are connected to the plurality of heat exchange tubes one by one.

[0010] Furthermore, the airflow detection component is a balloon, and the balloon is sleeved on an end of the detection tube away from the heat exchange tube.

[0011] Furthermore, one end of the detection tube close to the heat exchange tube is butt-jointed via a joint.

[0012] Furthermore, the negative pressure device includes a negative pressure tube, a vacuum shut-off valve and a negative pressure pump, and the negative pressure pump is connected to the first sealing cover through the negative pressure tube.

[0013] Furthermore, the negative pressure device also includes a vacuum pressure gauge, and the vacuum pressure gauge is arranged on the negative pressure pipe between the vacuum cut-off valve and the first sealing cover.

[0014] Furthermore, it also includes a first rubber ring and a second rubber ring, wherein the first rubber ring is arranged between the first sealing cover and the condenser, and the second rubber ring is arranged between the second sealing cover and the condenser.

[0015] Furthermore, the detection tube is made of light-transmitting material.

[0016] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0017] 1. Start the negative pressure pump to extract air from the sealed cavity formed by the condenser, the first sealing cover and the second sealing cover to generate negative pressure. When the internal vacuum degree reaches between -80Kpa and -90Kpa, close the vacuum stop valve and maintain the overall pressure for 5 minutes. Observe the number of the vacuum stop valve to ensure whether there is any leakage. At the same time, observe the movement of the feathers in each detection tube, so as to quickly and accurately judge the leakage of the heat exchange tube in the sealed cavity area and which specific heat exchange tube is leaking, thereby improving the detection accuracy and efficiency.

[0018] 2. After the negative pressure pump draws vacuum, the large negative pressure generated can cause the first sealing cover and the second sealing cover to be adsorbed on both ends of the condenser, and no additional fixation is required, which greatly facilitates the installation and disassembly of the equipment and improves the detection efficiency. At the same time, it can also detect whether there is leakage in the condenser shell.

[0019] 3. The joint is embedded in the heat exchange tube at one end near the heat exchange tube, and the joint is either sleeved or embedded in the detection tube at one end near the detection tube. For ease of use, the joint is usually fixed to the detection tube. After the first sealing cover is connected to one end of the condenser, several joints are also connected to several heat exchange tubes. When a heat exchange tube leaks, the other end of the heat exchange tube is sealed by the sealing plug, so the incoming air will expand the corresponding balloon, so that it can be more intuitive to detect whether a heat exchange tube is leaking or damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a condenser heat exchange tube leakage detection device provided by the utility model;

[0022] Figure 2 This is a structural schematic diagram of a first embodiment of a condenser heat exchange tube leakage detection device provided by the utility model;

[0023] Figure 3 This is a structural schematic diagram of a second embodiment of a condenser heat exchange tube leakage detection device provided by the utility model;

[0024] Icons: 1. Condenser, 11. Heat exchange tube, 2. First sealing cover, 21. First mounting plate, 22. Detection tube, 23. Feather, 24. Balloon, 25. Joint, 26. First rubber ring, 3. Second sealing cover, 31. Second rubber ring, 32. Second mounting plate, 33. Sealing plug, 4. Negative pressure device, 41. Negative pressure tube, 42. Vacuum stop valve, 43. Negative pressure pump, 44. Vacuum pressure gauge. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] Reference Figure 1 to Figure 2As shown, this embodiment provides a condenser heat exchange tube leakage detection device, including a first sealing cover 2, a second sealing cover 3 and a negative pressure device 4, the first sealing cover 2 and the second sealing cover 3 are arranged at both ends of the condenser 1, so that a plurality of heat exchange tubes 11 in the condenser 1 are in a closed space, which is connected to the first sealing cover 2 through the negative pressure device 4, and air is extracted from the closed space to generate negative pressure;

[0029] At the same time, a first mounting plate 21 is provided in the first sealing cover 2, and a plurality of detection tubes 22 are arranged in an array on the mounting plate. The plurality of detection tubes 22 are connected one by one with the plurality of heat exchange tubes 11 in the condenser 1, and an airflow detection component is provided on the detection tubes 22. In specific implementation, after negative pressure is generated in the condenser 1 by the negative pressure device 4, if a certain heat exchange tube 11 has a leak, the air entering from the leaking part enters the heat exchange tube 11 and flows toward the side of the first sealing cover 2. When passing through the detection tube, it is identified by the airflow detection component, and then a certain damaged heat exchange tube 11 can be quickly detected.

[0030] It should be noted that the first sealing cover 2 and the second sealing cover 3 are both made of light-transmitting materials, usually tempered glass or acrylic plastic.

[0031] More specifically, Figure 2 As shown, the airflow detection component is a feather 23, and the feather 23 is arranged in the detection tube 22. The feather 23 can be arranged at one end of the detection tube 22 away from the inside of the heat exchange tube 11. When there is airflow inside the detection tube, it can be observed intuitively. At the same time, the detection tube 22 can be made of a light-transmitting material, such as a glass tube or an acrylic plastic tube. The feather 23 can be arranged inside the detection tube, and then it can be more intuitively observed through the detection tube that a specific feather has a disturbance.

[0032] like Figure 1 and 2 As shown, the negative pressure device 4 includes a negative pressure pipe 41, a vacuum stop valve 42 and a negative pressure pump 43, and the negative pressure pump 43 is connected to the first sealing cover 2 through the negative pressure pipe 41. The negative pressure device 4 also includes a vacuum pressure gauge 44, and the vacuum pressure gauge 44 is arranged on the negative pressure pipe 41 between the vacuum stop valve 42 and the first sealing cover 2. In specific implementation, during detection, the negative pressure pump 43 is started to extract air from the sealed cavity formed by the condenser 1, the first sealing cover 2 and the second sealing cover 3 to generate negative pressure. After the internal vacuum degree reaches between -80Kpa and -90Kpa, the vacuum stop valve 42 is closed, and the overall pressure is maintained for 5 minutes. The number of the vacuum stop valve 42 is observed to ensure whether there is a leak. At the same time, the movement of the feathers in each detection tube 22 is observed, so that the leakage of the heat exchange tube 11 in the sealed cavity area and which specific heat exchange tube 11 is leaking can be quickly and accurately determined.

[0033] More specifically, it also includes a first rubber ring 26 and a second rubber ring 31. The first rubber ring 26 is arranged between the first sealing cover 2 and the condenser 1, and the first rubber ring 26 is used for sealing between the first sealing cover 2 and the condenser 1. The second rubber ring 31 is arranged between the second sealing cover 3 and the condenser 1. Similarly, the second rubber ring 31 is also used for sealing between the two. In specific implementation, after the negative pressure pump 43 draws a vacuum, the large negative pressure generated can make the first sealing cover 2 and the second sealing cover 3 adsorbed on both ends of the condenser, and no additional fixation is required, which greatly facilitates the installation and disassembly of the equipment and improves the detection efficiency.

[0034] Embodiment 2:

[0035] Based on the first embodiment, as another embodiment, Figure 1 As shown, a second mounting plate 32 is provided in the second sealing cover 3, and a plurality of sealing plugs 33 are arranged in an array on the second mounting plate 32, and the plurality of sealing plugs 33 are connected one by one with the plurality of heat exchange tubes 11. The sealing plugs 33 are made of hard rubber and have a certain elasticity. When the second sealing cover 3 is connected with the condenser 1, the plurality of sealing plugs 33 can simultaneously abut against the plurality of heat exchange tubes 11, or they are tapered, and the small diameter end can be inserted into the heat exchange tube 11 to block one end of the heat exchange tube 11. The above-mentioned method of using feathers can also be used. If there is a leak, the corresponding heat exchange tube 11 can be accurately found.

[0036] Embodiment three:

[0037] Based on the second embodiment, Figure 1 and 3 As shown, the airflow detection component is a balloon 24, and the balloon 24 is sleeved on the end of the detection tube 22 away from the heat exchange tube 11. The end of the detection tube 22 close to the heat exchange tube 11 is connected through a joint 25. The joint 25 is embedded in the heat exchange tube at the end close to the heat exchange tube 11, and the end of the joint 25 close to the detection tube 22 can be sleeved or embedded with the detection tube, as long as there is almost no air leakage. For ease of use, the joint 25 is usually fixed to the detection tube 22. After the first sealing cover 2 is connected to one end of the condenser 1, several joints 25 are also connected to several heat exchange tubes 11. Then, when a certain heat exchange tube 11 leaks, the other end of the heat exchange tube is blocked by the sealing plug 33, so the incoming air will expand the corresponding balloon 24, and then it can be more intuitive to detect whether a certain heat exchange tube is leaking or damaged.

[0038] Embodiment 4:

[0039] Based on the above-mentioned second and third embodiments, the detection tube 22 may not be provided with a joint at one end close to the heat exchange tube 22, but may be directly embedded and connected with the heat exchange tube. The airflow detection element on the detection tube 22 may be the above-mentioned feather 23 or balloon 24. At that time, feathers and balloons are not the only ones, and other objects or electronic components that can detect airflow may be used, which will not be elaborated here.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A condenser heat exchange tube leak detection device, characterized in that: It comprises a first sealing cover (2), a second sealing cover (3) and a negative pressure device (4), wherein the first sealing cover (2) and the second sealing cover (3) are arranged at two ends of the condenser (1), and the negative pressure device (4) is connected to the first sealing cover (2); A first mounting plate (21) is arranged in the first sealing cover (2), a plurality of detection tubes (22) are arranged in an array on the first mounting plate (21), the plurality of detection tubes (22) are connected one by one with a plurality of heat exchange tubes (11) in the condenser (1), and an airflow detection component is arranged on the detection tubes (22).

2. A condenser heat exchange tube leak detection device according to claim 1, characterized in that: The first sealing cover (2) and the second sealing cover (3) are both made of light-transmitting materials.

3. A condenser heat exchange tube leak detection device according to claim 2, characterized in that: The airflow detection element is a feather (23), and the feather (23) is arranged in the detection tube (22).

4. A condenser heat exchange tube leakage detection device according to claim 2, characterized in that: A second mounting plate (32) is arranged inside the second sealing cover (3), and a plurality of sealing plugs (33) are arranged in an array on the second mounting plate (32). The plurality of sealing plugs (33) are connected one by one with the plurality of heat exchange tubes (11).

5. A condenser heat exchange tube leakage detection device according to claim 4, characterized in that: The airflow detection component is a balloon (24), and the balloon (24) is sleeved on an end of the detection tube (22) away from the heat exchange tube (11).

6. A condenser heat exchange tube leakage detection device according to claim 5, characterized in that: One end of the detection tube (22) close to the heat exchange tube (11) is butt-jointed via a joint (25).

7. A condenser heat exchange tube leakage detection device according to any one of claims 3 or 6, characterized in that: The negative pressure device (4) comprises a negative pressure pipe (41), a vacuum stop valve (42) and a negative pressure pump (43); the negative pressure pump (43) is connected to the first sealing cover (2) through the negative pressure pipe (41).

8. A condenser heat exchange tube leakage detection device according to claim 7, characterized in that: The negative pressure device (4) further comprises a vacuum pressure gauge (44), wherein the vacuum pressure gauge (44) is arranged on the negative pressure pipe (41) between the vacuum stop valve (42) and the first sealing cover (2).

9. A condenser heat exchange tube leakage detection device according to claim 8, characterized in that: It also comprises a first rubber ring (26) and a second rubber ring (31), wherein the first rubber ring (26) is arranged between the first sealing cover (2) and the condenser (1), and the second rubber ring (31) is arranged between the second sealing cover (3) and the condenser (1).

10. A condenser heat exchange tube leakage detection device according to claim 3, characterized in that: The detection tube (22) is made of a light-transmitting material.

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