CN217845558U - Single-tube leakage detection device for heat exchanger tube bundle - Google Patents
Single-tube leakage detection device for heat exchanger tube bundle Download PDFInfo
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- CN217845558U CN217845558U CN202221891499.6U CN202221891499U CN217845558U CN 217845558 U CN217845558 U CN 217845558U CN 202221891499 U CN202221891499 U CN 202221891499U CN 217845558 U CN217845558 U CN 217845558U
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Abstract
The utility model belongs to the technical field of the heat exchanger, a heat exchanger tube bank single tube leak hunting device is provided, include: the first sealing plug and the second sealing plug are respectively plugged at two ends of a single tube of the heat exchanger tube bundle; the air pump is connected with the second sealing plug; the first sealing plug and the second sealing plug seal the single tube of the heat exchanger tube bundle, and gas is filled into the single tube through the gas pump so as to detect whether the single tube leaks gas or not. The utility model provides a pair of heat exchanger tube bank single tube leak hunting device to and the heat exchanger tube bank leak hunting shutoff method of using this leak hunting device, effectively solved the damaged, frost crack scheduling problem of a small amount of heat exchanger tube banks that take place among the shell and tube heat exchanger tube bank operation process, simple process, maneuverability is high, has shortened the repair cycle of heat exchanger tube bank greatly, has saved the cost of labor.
Description
Technical Field
The utility model belongs to the technical field of the heat exchanger, especially, relate to a heat exchanger tube bank single tube leak hunting device, simultaneously the utility model also provides an use heat exchanger tube bank leak hunting shutoff method of this leak hunting device.
Background
In remote alpine regions of China, the coal storage capacity is very rich, thermal power plants are very suitable for construction, but water resources are deficient, and the environment is also relatively severe. In order to achieve the purpose of water conservation, the unit often adopts an indirect air cooling technology to cool circulating water for recycling, however, the tube wall of a heat exchange tube of the tube bundle of the indirect air cooling shell and tube heat exchanger is thin and made of aluminum alloy, so that the heat exchange tube is soft, and the problems of frost cracking, corrosion and the like easily occur in the heat exchange tube in the long-term operation process under severe environment.
In response to this problem, the damaged heat exchange tubes must be repaired to ensure proper operation of the entire heat exchanger tube bundle system. The conventional repairing method is to disassemble the whole hoisting of the heat exchanger cooling column with problems, perform leak detection on a single heat exchanger tube bundle, determine a leaking tube, and reassemble, hoist, test and operate pressure during targeted repairing. However, the method has the disadvantages of large repair workload, long period, high labor cost and high operation difficulty.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a heat exchanger tube bank single tube leak hunting device has effectively solved the damaged, frost crack scheduling problem of a small amount of heat exchanger tube banks that take place among the shell and tube heat exchanger tube bank operation process, simple process, maneuverability is high.
The utility model provides a heat exchanger tube bank single tube leak hunting device, the heat exchanger includes a plurality of tube banks, include:
the first sealing plug and the second sealing plug are respectively plugged at two ends of a single tube of the heat exchanger tube bundle;
the air pump is connected with the second sealing plug;
the first sealing plug and the second sealing plug seal the single tube of the heat exchanger tube bundle, and gas is filled into the single tube through the gas pump so as to detect whether the single tube leaks gas or not.
Preferably, the first sealing plug or the second sealing plug each comprises:
a threaded screw;
a first fixing member at an end of the screw;
the first gland and the second gland are screwed on the screw rod;
the sealing element is clamped between the first gland and the second gland, and the maximum diameter position of the sealing element is in contact with the inner wall of the single tube of the heat exchanger tube bundle so as to seal the single tube of the heat exchanger tube bundle; and
and the first pressing cover and the second pressing cover are clamped and fixed between the first fixing piece and the second fixing piece.
Preferably, the first sealing plug or the second sealing plug further comprises a handle, so that the first sealing plug or the second sealing plug can be screwed into the port of the single tube of the heat exchanger tube bundle.
Preferably, the air pump connecting part is located at the other end of the screw rod and is used for being connected with an inflation hose of the air pump.
Preferably, the screw of the second sealing plug is hollow and is communicated with an inflation hose of the air pump.
Preferably, the outer diameters of the first gland and the second gland are 2-3mm smaller than the inner diameter of the single tubes of the heat exchanger tube bundle.
Preferably, the sealing element is made of rubber and has retractility so as to ensure that the first sealing plug or the second sealing plug is completely sealed with the single tube of the heat exchanger tube bundle.
According to the utility model discloses, the utility model provides a pair of heat exchanger tube bank single tube leak hunting device can carry out the leak hunting to the heat exchanger tube bank that damages fast effectively.
The single-tube leak detection device for the heat exchanger tube bundle is applied to a leak detection plugging method for the heat exchanger tube bundle, and the leak detection plugging method for the heat exchanger tube bundle comprises the following steps:
step (1), disassembling a heat exchanger tube bundle;
step (2), leak detection is carried out by using the single-tube leak detection device of the heat exchanger tube bundle;
step (3), plugging the damaged single tubes of the heat exchanger tube bundle detected in the step (2);
step (4), a complete heat exchanger tube bundle and a blocked damaged single tube of the heat exchanger tube bundle are reinstalled on the heat exchanger;
and (5) carrying out water feeding operation on the heat exchanger tube bundle triangle as a whole, carrying out pressure test, and if no leakage exists, indicating that the heat exchanger tube bundle is successfully subjected to leakage detection and plugging.
Preferably, the plugging method in step (3) comprises: taking two plugging pipes with the outer diameter 0-0.2mm smaller than the inner diameter of a single pipe of a damaged heat exchanger pipe bundle, sealing one end of each plugging pipe and sinking inwards, and opening the other end of each plugging pipe, coating sealing silica gel on the surface of each plugging pipe, plugging the inwards sunk end into one end of the single pipe of the damaged heat exchanger pipe bundle, welding and sealing the plugging pipe and the single pipe at the sealing position, and welding and sealing the other end of the single pipe of the damaged heat exchanger pipe bundle by adopting the same method.
Preferably, the material of the plugging pipe is the same as that of the heat exchanger tube bundle, and the plugging pipe is a steel pipe or an aluminum pipe, and the length of the plugging pipe is 150-250mm.
In the leak detection and plugging method for the heat exchanger tube bundle, the plugging pipe matched with the heat exchanger tube bundle can effectively plug the damaged heat exchanger tube bundle, and is matched with sealing silica gel for use, so that the plugging effect is better.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of heat exchanger tube bank single tube leak hunting device to and use this leak hunting device's heat exchanger tube bank leak hunting shutoff method, shortened heat exchanger tube bank's repair cycle greatly, saved the cost of labor.
Drawings
Fig. 1 is the utility model relates to a heat exchanger tube bank single tube leak hunting device's schematic structure diagram.
Fig. 2 is the utility model relates to a structural schematic diagram of a first sealing plug of heat exchanger tube bank single tube leak detection device.
Fig. 3 is the utility model relates to a structural schematic diagram of the second sealing plug of heat exchanger tube bank single tube leak detection device.
Fig. 4 is a process flow chart of the leak detection method of the heat exchanger tube bundle by using the single tube leak detection device of the heat exchanger tube bundle in fig. 1.
Fig. 5 is a schematic view of the structure of the blocking tube used in fig. 4.
Detailed Description
The present invention is further described below in conjunction with the following embodiments and the accompanying drawings, which are to be understood as being illustrative of the present invention and not restrictive.
As shown in fig. 1, the utility model provides a heat exchanger tube bank single tube leak hunting device, include:
the first sealing plug 1 and the second sealing plug 2 are respectively plugged at two ends of a single tube 3 of the heat exchanger tube bundle;
the air pump 4 is connected with the second sealing plug 2, and the second sealing plug 2 connected with the air pump 4 comprises an air pump connecting part 21;
the first sealing plug 1 and the second sealing plug 2 seal the heat exchanger tube bundle single tube 3, and air is filled into the single tube 3 through the air pump 4 to detect whether the single tube 3 leaks air. If the single tube 3 of the heat exchanger tube bundle leaks air, the pressure of the charged air cannot be maintained, and the single tube of the heat exchanger tube bundle is damaged.
Fig. 2 shows a schematic structure of the first sealing plug 1, fig. 3 shows a schematic structure of the second sealing plug 2, and it can be seen that the first sealing plug 1 and the second sealing plug 2 both comprise:
threaded screws 11, 21;
first fixing members 12, 22 at ends of the screws 11, 21;
first and second glands 13, 23, 14, 24 screwed on the screws 11, 21;
the second fixing pieces 16 and 26, the first pressing covers 13 and 23 and the second pressing covers 14 and 24 are clamped between the first fixing pieces 12 and 22 and the second fixing pieces 16 and 26.
The first sealing plug 1 is similar to the second sealing plug 2 in structure, except that the second sealing plug 2 has a structure which is more than the first sealing plug 1 by an air pump connection part 28 for connecting with an inflation hose 41 of an air pump 4, and the air pump connection part 27 is located at the other end of the screw rod 21 as shown in fig. 4.
In a preferred embodiment of the first sealing plug 1 and the second sealing plug 2 of the present invention, the first sealing plug 1 and the second sealing plug 2 further comprise handles 17 and 27, so that the first sealing plug 1 and the second sealing plug 2 are screwed into the port of the single tube 3 of the heat exchanger tube bundle.
The air generated by the air pump 4 enters the single tube 3 of the heat exchanger tube bundle from the second sealing plug 2 through the inflating hose 41, so that the screw 21 of the second sealing plug 2 is hollow and is connected with the inflating hose 41 of the air pump 4.
In the preferred embodiment of the first sealing plug 1 and the second sealing plug 2 of the present invention, the outer diameters of the first pressing cover 13 and the second pressing cover 23 are 2-3mm smaller than the inner diameter of the single tube 3 of the heat exchanger tube bundle, and the outer diameters of the sealing members 15 and 25 are slightly larger than the outer diameters of the first pressing cover 13 and the second pressing cover 23, so that the first sealing plug 1 and the second sealing plug 2 can be conveniently plugged into the single tube 3 of the heat exchanger tube bundle and can be kept completely sealed.
In order to further ensure the complete sealing of the first sealing plug 1 or the second sealing plug 2 and the single tube 3 of the heat exchanger tube bundle, the material of the sealing members 15 and 25 is preferably a rubber material with retractility.
Will the utility model discloses an among the above-mentioned heat exchanger tube bank single tube leak hunting device was applied to the leak hunting shutoff method of heat exchanger tube bank, as shown in fig. 4, heat exchanger tube bank leak hunting shutoff method includes following step:
s1, disassembling a heat exchanger tube bundle. The utility model discloses use the air cooling heat exchanger as the example, air cooling heat exchanger tube bank triangle can be become by two cooling columns group usually, and a cooling column can become by 3 ~ 4 heat exchanger tube banks, and a heat exchanger tube bank highly is usually at 6 ~ 8 meters, so heat exchanger tube bank cooling column height is usually about 30 meters. The lower part of the cooling column is provided with a water inlet and outlet header, and the upper part is provided with a water return header. In order to realize the leakage detection and plugging of the specific heat exchanger tube bundle, the upper header and the lower header of the heat exchanger are firstly disassembled.
S2, the heat exchanger tube bank that will dismantle uses one by one the utility model discloses an above-mentioned heat exchanger tube bank single tube leak hunting device carries out the leak hunting.
Through the single-tube leak detection device for the heat exchanger tube bundle, the disassembled heat exchanger tube bundle can be subjected to leak detection one by one, and the using method comprises the following steps: the first sealing plug 1 and the second sealing plug 2 are plugged into the heat exchanger tube bundle single tube 3 to seal the heat exchanger tube bundle single tube 3, air is filled into the single tube 3 through the air pump 4 to detect whether the single tube 3 leaks air, if the heat exchanger tube bundle single tube 3 leaks air, the pressure of the filled air cannot be kept, and the heat exchanger tube bundle single tube is judged to be a damaged heat exchanger tube bundle single tube.
And S3, plugging the damaged single tube of the heat exchanger tube bundle detected in the second step.
The plugging method comprises the following steps: as shown in fig. 5, two plugging tubes 5 with an outer diameter 0-0.2mm smaller than the inner diameter of a single tube of a damaged heat exchanger tube bundle are taken, one end 51 of each plugging tube 5 is closed and recessed inwards, the other end 52 of each plugging tube is open, then sealing silica gel is coated on the surface of each plugging tube 5, the inwardly recessed end 51 is plugged into one end of the damaged single tube 3 of the heat exchanger tube bundle, the sealing positions of the plugging tubes 5 and the single tubes 3 are welded and sealed, and the other end of the damaged single tube 3 of the heat exchanger tube bundle is welded and sealed by the same method to form one plugging tube 5. The material of shutoff pipe 5 and the material of heat exchanger tube bank single tube 3 can be the same, also can be different, in the utility model discloses preferably the two materials is the same, for example be steel pipe or aluminum pipe, the length of shutoff pipe 5 can be 150-250mm, for example is about 200 mm's length.
In a specific implementation mode of plugging, during plugging, the whole plugging pipe 5 is coated with sealing silica gel, one end 51 is knocked to enable the plugging pipe to be sunken inwards, the inwards sunken end 51 is plugged into the single pipe 3 of the heat exchanger tube bundle and can be knocked to enter, the plugging pipe 5 and the single pipe 3 of the heat exchanger tube bundle are enabled to be located on the same straight line, the plugging pipe 5 and the single pipe 3 of the heat exchanger tube bundle are expanded and connected once by using a manual tube expander, complete lamination is guaranteed, and the end face of the plugging pipe 5 is continuously coated with the sealing silica gel to guarantee sealing.
In a preferred embodiment, the sealing silica gel used is neutral to prevent the circulating water of the heat exchanger from reacting with the tube bundle of the heat exchanger to cause corrosion for a long time. The outer diameter of the plugging pipe 5 is 0-0.2mm smaller than the inner diameter of a single pipe of the heat exchanger pipe bundle, and the wall thickness of the plugging pipe can be the same as or different from that of the single pipe of the heat exchanger pipe bundle.
The sealing silica gel needs to wait for about 12 hours to solidify after coating and filling.
And S4, reinstalling the intact heat exchanger tube bundle and the plugged damaged single tubes of the heat exchanger tube bundle on the heat exchanger.
And S5, carrying out water feeding operation on the heat exchanger tube bundle triangle as a whole, carrying out pressure test, and if no leakage exists, indicating that the heat exchanger tube bundle is successfully subjected to leakage detection and plugging.
In a specific embodiment, after the sealing silica gel is completely sealed and solidified, the intact heat exchanger tube bundle and the blocked damaged single tube of the heat exchanger tube bundle are reinstalled on the heat exchanger, the water inlet and outlet and water return headers are installed, then the heat exchanger tube bundle triangle is integrally operated in water, pressure test is carried out, observation is carried out for about 30 minutes, and if no leakage exists, the heat exchange tube blocking is successful.
It should explain, the utility model provides a heat exchanger tube bank leak hunting shutoff method is applicable to the heat exchanger tube bank of shutoff and accounts for the proportion of total heat exchanger tube bank and be no more than 2%, otherwise probably influences the whole heat transfer effect of heat exchanger.
The utility model provides a pair of heat exchanger tube bank single tube leak hunting device to and the heat exchanger tube bank leak hunting shutoff method of using this leak hunting device, effectively solved the damaged, frost crack scheduling problem of a small amount of heat exchanger tube banks that take place among the shell and tube heat exchanger tube bank operation process, simple process, maneuverability is high, has shortened the repair cycle of heat exchanger tube bank greatly, has saved the cost of labor.
The present invention may be embodied in several forms without departing from the spirit of the essential characteristics thereof, and the embodiments are therefore to be considered in all respects as illustrative and not restrictive, since the scope of the invention is defined by the appended claims rather than by the description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. The utility model provides a single tube leak hunting device of heat exchanger tube bank, the heat exchanger includes a plurality of tube banks, its characterized in that includes:
the first sealing plug and the second sealing plug are plugged at two ends of a single pipe of the heat exchanger pipe bundle respectively;
the air pump is connected with the second sealing plug;
the first sealing plug and the second sealing plug seal the single tube of the heat exchanger tube bundle, and gas is filled into the single tube through the gas pump so as to detect whether the single tube leaks gas or not.
2. The single tube leak detection device for the heat exchanger tube bundle according to claim 1, wherein the first sealing plug or the second sealing plug each comprises:
a threaded screw;
a first fixing member at an end of the screw;
the first gland and the second gland are screwed on the screw rod;
the sealing element is clamped between the first pressing cover and the second pressing cover, and the maximum diameter part of the sealing element is in contact with the inner wall of the single tube of the heat exchanger tube bundle so as to seal the single tube of the heat exchanger tube bundle; and
and the first pressing cover and the second pressing cover are clamped and fixed between the first fixing piece and the second fixing piece.
3. The heat exchanger tube bundle single-tube leak detection device according to claim 2, wherein the first sealing plug or the second sealing plug further comprises a handle so as to screw the first sealing plug or the second sealing plug into the port of the single tube of the heat exchanger tube bundle.
4. The single-tube leak detection device for the heat exchanger tube bundle according to claim 2, wherein a connecting portion of the air pump is located at the other end portion of the screw and is used for being connected with an inflation hose of the air pump.
5. The single-tube leak detection device for the heat exchanger tube bundle according to claim 2, wherein the screw of the second sealing plug is hollow and is communicated with an inflation hose of the air pump.
6. The single tube leak detection apparatus of the heat exchanger tube bundle according to claim 2, wherein the outer diameters of the first gland and the second gland are 2-3mm smaller than the inner diameter of the single tube of the heat exchanger tube bundle.
7. The single-tube leak detection device for the heat exchanger tube bundle according to any one of claims 2 to 6, wherein the sealing member is made of rubber and has retractility so as to ensure complete sealing between the first sealing plug or the second sealing plug and the single tube of the heat exchanger tube bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221891499.6U CN217845558U (en) | 2022-07-21 | 2022-07-21 | Single-tube leakage detection device for heat exchanger tube bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221891499.6U CN217845558U (en) | 2022-07-21 | 2022-07-21 | Single-tube leakage detection device for heat exchanger tube bundle |
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| Publication Number | Publication Date |
|---|---|
| CN217845558U true CN217845558U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221891499.6U Active CN217845558U (en) | 2022-07-21 | 2022-07-21 | Single-tube leakage detection device for heat exchanger tube bundle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117781736A (en) * | 2024-02-27 | 2024-03-29 | 福建三明润祥新材料有限公司 | Heat exchanger for distillation |
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2022
- 2022-07-21 CN CN202221891499.6U patent/CN217845558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117781736A (en) * | 2024-02-27 | 2024-03-29 | 福建三明润祥新材料有限公司 | Heat exchanger for distillation |
| CN117781736B (en) * | 2024-02-27 | 2024-05-31 | 福建三明润祥新材料有限公司 | Heat exchanger for distillation |
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