CN216116610U - Accurate leak detection system of gas-water heat exchanger - Google Patents
Accurate leak detection system of gas-water heat exchanger Download PDFInfo
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- CN216116610U CN216116610U CN202122266164.7U CN202122266164U CN216116610U CN 216116610 U CN216116610 U CN 216116610U CN 202122266164 U CN202122266164 U CN 202122266164U CN 216116610 U CN216116610 U CN 216116610U
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Abstract
The utility model discloses an accurate leak detection system for a gas-water heat exchanger, which comprises an inlet header, an inlet valve, an outlet valve, a plurality of heat exchange tubes and a measuring system for detecting static pressure at the connecting position of the heat exchange tubes and the inlet header; the one end of entry collection case is connected with the inlet valve, and the other end of entry collection case is connected with the entry of heat exchange tube, and the export of heat exchange tube is connected with the one end of export collection case, and the other end of export collection case is connected with the outlet valve, and this system can be after the discovery is leaked the accurate heat exchange tube that detects out the leakage.
Description
Technical Field
The utility model belongs to the technical field of heat exchangers, and relates to an accurate leak detection system for a gas-water heat exchanger.
Background
The gas-water heat exchanger is widely applied in the industrial field, in particular to a low-temperature gas-water heat exchanger which comprises a low-temperature economizer, a fan heater, a flue gas reheater and the like. The cross section of a commonly used gas-water heat exchanger is very large, the number of heat exchange tubes can reach thousands, and if one heat exchange tube leaks, the heat exchange tube is difficult to find and position.
Common leak detection methods include a hygrometer, a sound leak detection method, a flow leak detection method, and the like. Because the cross-sectional area of the gas-water heat exchanger is very big, the price of the hygrometer is higher, the detection range is limited, and the precision of the hygrometer is poorer under the condition of large ash content in flue gas, and the leak detection effect cannot be achieved. For a heat exchanger with a lower pressure grade, the sound emitted after leakage is smaller, the background noise infection is too large, and the sound leakage detection method cannot achieve the effect. The flow leakage detection method is to find leakage by utilizing the flow difference of working substances at the inlet and the outlet of a heat exchanger, but the fluctuation of the flow meter is large, even if no leakage exists, the readings of the two flow meters can not be consistent, so the flow meters can not detect leakage effectively. The common water side pressure leak detection method can only monitor the leakage of a certain module, and the whole module is isolated during isolation, so that the influence on a heat exchanger is large, and the leakage precision of a certain pipe cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides an accurate leakage detection system for a gas-water heat exchanger, which can accurately detect a leaked heat exchange tube after leakage is found.
In order to achieve the purpose, the accurate leak detection system for the gas-water heat exchanger comprises an inlet header, an inlet valve, an outlet valve, a plurality of heat exchange tubes and a measuring system for detecting the static pressure at the connecting position of the heat exchange tubes and the inlet header;
the one end of entry collection case is connected with the entry valve, and the other end of entry collection case is connected with the entry of heat exchange tube, and the export of heat exchange tube is connected with the one end of export collection case, and the other end of export collection case is connected with the exit valve.
The bottom of the inlet header is provided with a first hand hole;
the first hand hole comprises a short pipe, a flange plate, a blind plate and a bolt, the flange plate is connected with the blind plate through the bolt, and the short pipe in the first hand hole is communicated with the bottom of the inlet header.
The bottom of the outlet header is provided with a second hand hole, the structure of the first hand hole is the same as that of the second hand hole, and the short pipe in the second hand hole is communicated with the bottom of the outlet header.
The diameter of the short pipe is 100 mm.
The length of the short pipe is 20 mm.
The measuring system comprises a static pressure measuring tube, a micropressure meter and a silicone tube, wherein the tail part of the static pressure measuring tube is connected with the micropressure meter through the silicone tube, and when the measuring system is used, the static pressure measuring tube extends into the connecting position of the heat exchange tube and the inlet header.
The static pressure measuring pipe is a metal hose.
The head of the static pressure measuring tube is provided with four measuring holes.
All the measuring holes are uniformly distributed along the circumferential direction.
The utility model has the following beneficial effects:
when the accurate leak detection system for the gas-water heat exchanger is in specific operation, the inlet valve and the outlet valve are closed, water in the heat exchanger is emptied, the second hand hole is opened, and the smoke (air) channel is communicated with the atmosphere through the leaked heat exchange tube. When smoke (air) is in positive pressure, the smoke (air) leaks into the atmosphere through the leaked heat exchange tube, if the smoke (air) is in negative pressure, the atmosphere can leak into a smoke (air) channel through the leaked heat exchange tube, under any condition, the air flow speed is fastest at the joint of the leaked heat exchange tube and the inlet header, and the static pressure measured by the static pressure measuring tube is minimum.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a schematic diagram of a test system of the present invention;
fig. 5 is a schematic view of the first hand hole 61 of the present invention.
Wherein, 1 is an inlet valve, 2 is an inlet header, 3 is a heat exchange tube, 4 is an outlet valve, 5 is an outlet header, 6 is a hand hole, 6-1 is a short tube, 6-2 is a flange plate, 6-3 is a blind plate, 6-4 is a bolt, 7 is a measuring hole, 8 is a static pressure measuring tube, 9 is a micro-manometer, and 10 is a silicone tube.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the utility model. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, 2 and 3, the accurate leak detection system for the gas-water heat exchanger of the utility model comprises an inlet header 2, an inlet valve 1, an outlet valve 4, a plurality of heat exchange tubes 3 and a measurement system for detecting static pressure at the connection position of the heat exchange tubes 3 and the inlet header 2;
one end of the inlet header 2 is connected with the inlet valve 1, the other end of the inlet header 2 is connected with the inlet of the heat exchange tube 3, the outlet of the heat exchange tube 3 is connected with one end of the outlet header 5, and the other end of the outlet header 5 is connected with the outlet valve 4.
Referring to fig. 4, a first hand hole 61 is installed at the bottom of the inlet header 2, a second hand hole 62 is installed at the bottom of the outlet header 5, the first hand hole 61 and the second hand hole 62 both include short pipes 6-1, flange plates 6-2, blind plates 6-3 and bolts 6-4, the flange plates 6-2 and the blind plates 6-3 are connected through the bolts 6-4, the short pipes 6-1 in the first hand holes 61 are communicated with the bottom of the inlet header 2, the short pipes 6-1 in the second hand holes 62 are communicated with the bottom of the outlet header 5, the diameter of the short pipes 6-1 is 100mm, and the length of the short pipes 6-1 is 20 mm.
Referring to fig. 5, the measuring system includes a static pressure measuring tube 8, a micro-pressure gauge 9 and a silicone tube 10, wherein the tail of the static pressure measuring tube 8 is connected with the micro-pressure gauge 9 through the silicone tube 10;
the static pressure measuring pipe 8 is a metal hose.
The head of the static pressure measuring tube 8 is provided with four measuring holes 7, wherein the measuring holes 7 are uniformly distributed along the circumferential direction.
The specific application process of the measuring system is as follows:
1) closing the inlet valve 1 and the outlet valve 4, and emptying the water in the heat exchange tube 3;
2) opening the bolt 6-4 in the first hand hole 61, extending the static pressure measuring tube 8 into the first hand hole 61, and keeping the static pressure measuring tube 8 parallel to the axis of the inlet header 2;
3) one end of a micro-pressure meter 9 is connected with the atmosphere, the other end of the micro-pressure meter 9 is communicated with a static pressure measuring tube 8 through a silicone tube 10, and static pressure readings in the micro-pressure meter 9 are observed;
4) moving a measuring hole 7 of a static pressure measuring tube 8 from the lower part to the upper part of the inlet header 2, observing a static pressure reading in a micro-pressure meter 9 in the process, and finding out a corresponding heat exchange tube 3 as a leaked heat exchange tube when the reading is less than a preset value;
5) the heat exchange tube 3 with the lowest index is isolated from the inlet header 2 and the outlet header 5, and then the step 4) is repeated, and all leaked heat exchange tubes 3 are found out and isolated;
6) the inlet valve 1 and the outlet valve 4 are opened, and the heat exchange tube 3 is put into operation again.
The specific working process of the utility model is as follows:
the inlet valve 1 and the outlet valve 4 are closed, so that the heat exchanger becomes a closed system, and the water in the heat exchanger is emptied. The first hand hole 61 is opened, at the moment, the gas is communicated with the atmosphere through the leaked heat exchange tube 3, the air flow speed is the fastest, the static pressure is the minimum at the joint of the leaked heat exchange tube 3 and the inlet header 2, the static pressure is measured by the static pressure measuring tube 8, the leaked heat exchange tube 3 can be accurately found out, then, the leaked heat exchange tube is isolated from the inlet header 2 and the outlet header 5 by hard isolation, and the rest heat exchange tubes 3 continue to operate.
Claims (9)
1. An accurate leak detection system for a gas-water heat exchanger is characterized by comprising an inlet header (2), an inlet valve (1), an outlet valve (4), a plurality of heat exchange tubes (3) and a measuring system for detecting static pressure at the connecting positions of the heat exchange tubes (3) and the inlet header (2);
one end of the inlet header (2) is connected with the inlet valve (1), the other end of the inlet header (2) is connected with the inlet of the heat exchange tube (3), the outlet of the heat exchange tube (3) is connected with one end of the outlet header (5), and the other end of the outlet header (5) is connected with the outlet valve (4).
2. The gas-water heat exchanger accurate leakage detection system according to claim 1, characterized in that a first hand hole (61) is installed at the bottom of the inlet header (2);
the first hand hole (61) comprises a short pipe (6-1), a flange plate (6-2), a blind plate (6-3) and a bolt (6-4), the flange plate (6-2) is connected with the blind plate (6-3) through the bolt (6-4), and the short pipe (6-1) in the first hand hole (61) is communicated with the bottom of the inlet header (2).
3. The accurate leak detection system for the gas-water heat exchanger is characterized in that a second hand hole (62) is installed at the bottom of the outlet header (5), the first hand hole (61) and the second hand hole (62) are identical in structure, and a short pipe (6-1) in the second hand hole (62) is communicated with the bottom of the outlet header (5).
4. The gas-water heat exchanger accurate leak detection system according to claim 2, characterized in that the diameter of the short pipe (6-1) is 100 mm.
5. The gas-water heat exchanger accurate leakage detection system according to claim 2, wherein the length of the short pipe (6-1) is 20 mm.
6. The gas-water heat exchanger accurate leakage detection system according to claim 2, wherein the measurement system comprises a static pressure measuring tube (8), a micro-pressure gauge (9) and a silicone tube (10), wherein the tail part of the static pressure measuring tube (8) is connected with the micro-pressure gauge (9) through the silicone tube (10), and when the system is used, the static pressure measuring tube (8) extends into the position where the heat exchange tube (3) is connected with the inlet header (2).
7. The gas-water heat exchanger accurate leakage detection system according to claim 6, wherein the static pressure measurement pipe (8) is a metal hose.
8. The gas-water heat exchanger accurate leakage detection system according to claim 6, characterized in that the head of the static pressure measuring tube (8) is provided with four measuring holes (7).
9. The gas-water heat exchanger accurate leakage detection system according to claim 8, wherein the measuring holes (7) are uniformly distributed along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122266164.7U CN216116610U (en) | 2021-09-17 | 2021-09-17 | Accurate leak detection system of gas-water heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122266164.7U CN216116610U (en) | 2021-09-17 | 2021-09-17 | Accurate leak detection system of gas-water heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216116610U true CN216116610U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122266164.7U Active CN216116610U (en) | 2021-09-17 | 2021-09-17 | Accurate leak detection system of gas-water heat exchanger |
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| CN (1) | CN216116610U (en) |
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2021
- 2021-09-17 CN CN202122266164.7U patent/CN216116610U/en active Active
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