CN202938970U - Device for detecting helium leakage of seal welding of pipes and pipe sheets of framework open type heat exchanger - Google Patents
Device for detecting helium leakage of seal welding of pipes and pipe sheets of framework open type heat exchanger Download PDFInfo
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- CN202938970U CN202938970U CN 201220610165 CN201220610165U CN202938970U CN 202938970 U CN202938970 U CN 202938970U CN 201220610165 CN201220610165 CN 201220610165 CN 201220610165 U CN201220610165 U CN 201220610165U CN 202938970 U CN202938970 U CN 202938970U
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- heat exchanger
- sealing
- cylindrical shell
- helium
- tube sheet
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Abstract
The utility model relates to a seal welding leakage detecting device, particularly to a device for detecting helium leakage of seal welding of pipes and pipe sheets of a framework open type heat exchanger. The device comprises an accommodation chamber formed by cylindrical shell and a base plate and used for placing the heat exchanger, and a sealing end cover covering the upper end of the cylindrical shell, wherein the cylindrical shell is equipped with a gas inlet used for filling detection gas to the accommodation chamber, a gas outlet used for discharging gas and a pressure gauge for detecting the pressure of the accommodation chamber, and the seal end cover is equipped with a sealing part used for sealing with the pipe sheets of the heat exchanger. According to the device for detecting helium leakage of seal welding of the pipes and the pipe sheets of the framework open type heat exchanger, the heat exchanger is put in the accommodation chamber formed by the cylindrical shell and the base plate, and then the seal end cover is used to cover the upper end of the cylindrical shell and sealing with the pipe sheets of the heat exchanger is realized through the sealing part, forming a seal chamber filled with helium, the helium enters from the gas inlet and accumulates in the chamber, and detecting personnel can detect helium leakage of seal welding seams of a large number of the pipes at the outer sides of the pipe sheets, and not only is the operation simple, but thee detection efficiency is also greatly improved.
Description
Technical field
The utility model relates to a kind of sealing weldering leakage detection apparatus, particularly a kind of open frame formula heat exchanger tube and tube sheet sealing weldering helium-leakage detecting apparatus.
Background technology
Shell-and-tube exchanger or similar heat exchanger must guarantee to be in operation not can the generator tube side and shell-side between the leakage of fluid.Connection of tube and tube sheet is an important structure of shell-and-tube exchanger or similar heat exchanger, is also the place of the most easily leaking.Sealing weldering is to weld at the connection of tube and tube sheet place, can effectively guarantee the sealing that tube-to-tube sheet connection connects.In order to guarantee to seal the quality of weldering, must carry out Leak Off Test (LOT) to it, wherein helium leak test is exactly a kind of common Leak Off Test (LOT) that is used for crucial visual plant sealing weldering.
Whether need to fill helium or the helium/air gas mixture of certain pressure in a side of sealing weldering when helium leak test, detecting at opposite side has helium to leak.For shell-and-tube exchanger, be the space of a sealing due to shell-side, therefore can be used as the cavity that helium is filled; But for open frame formula heat exchanger, be the space of an opening due to shell-side, thus an additional reservoir need to be set in addition, as the cavity of helium filling.For the helium leak test of open weld seam, be by the side part at weld seam, a little cavity to be set, be full of helium inside, detect at opposite side.But, because the heat exchanger tube quantum count is huge, need the sealing welding line quantity of detection a lot, so method efficient is very low.Simultaneously, a side of welding due to the sealing of heat exchanger tube tube sheet is covered with pipe, and the gap between pipe and pipe is very little, cavity is set or detect all very difficult in this side.
The utility model content
In order to overcome above-mentioned technical matters, the purpose of this utility model is to provide a kind of convenience, efficient open frame formula heat exchanger tube and tube sheet sealing weldering helium-leakage detecting apparatus.
The technical scheme that the utility model adopts is:
A kind of open frame formula heat exchanger tube and tube sheet sealing weldering helium-leakage detecting apparatus, comprise the accommodating cavity that is used for the placement heat exchanger that is consisted of by cylindrical shell, base plate and the end cover that is covered in the cylindrical shell upper end, described cylindrical shell is provided with for the air intake opening that detects gas toward the accommodating cavity filling, is used for the exhausr port of exhaust and detects the tensimeter of accommodating cavity pressure, and described end cover is provided with for the sealing that mutually seals with the heat exchanger tube sheet.
As further improvement in the technical proposal, described cylindrical shell is provided with reinforcement, and described end cover is provided with stiffening rib.
As further improvement in the technical proposal, the edge of described cylindrical shell upper end is provided with flange, and described end cover comprises the large end cap that is connected with flange by seal assembly; Described large end cap is provided with the opening that the heat exchanger tube sheet stretches out, the edge of described opening is fixedly connected with the tube sheet sealing bore, the upper end of described tube sheet sealing bore is fixed with small end cover, and described sealing comprises that small end cover is used for the inboard with heat exchanger tube sheet welded seal.
As further improvement in the technical proposal, described flange with the joint face of large end cap on be provided with groove, thereby described seal assembly comprises the O RunddichtringO that is arranged in groove and is used for the clamping screw of locking flange and large end cap press seal circle.
As further improvement in the technical proposal, what on described large end cap, the confession clamping screw passed is oblong bolt hole.
As further improvement in the technical proposal, be provided with the locating device for the heat exchanger contraposition in described accommodating cavity, described locating device is arranged on cylinder inboard wall.
As further improvement in the technical proposal, described end cover is provided with safety valve.
As further improvement in the technical proposal, described cylindrical shell or end cover are provided with the gas sample mouth that is communicated with accommodating cavity.
As further improvement in the technical proposal, described base plate upper surface is coated with and contacts with heat exchanger and the stainless sheet steel of supporting hot interchanger.
As further improvement in the technical proposal, described cylinder body outer wall is provided with the cylindrical shell hanger for lifting, and described end cover is provided with the end cap hanger for lifting.
The beneficial effects of the utility model are: put into heat exchanger in the accommodating cavity that the utility model cylindrical shell, base plate consist of, be covered in the cylindrical shell upper end and realize sealing by sealing and heat exchanger tube sheet with end cover afterwards, form the seal chamber of filling helium, helium enters rear in the cavity inner accumulated from air intake opening, the testing staff can seal the helium leak test of welding line simultaneously in the outside of tube sheet to the huge pipe of quantity, not only simple to operate, and greatly improved the efficient that detects.
Description of drawings
Below in conjunction with drawings and embodiments, the utility model is further illustrated.
Fig. 1 is front view of the present utility model;
Fig. 2 is vertical view of the present utility model;
Fig. 3 is that the A of Fig. 2 is to cut-open view;
Fig. 4 is the enlarged diagram of B part in Fig. 3;
Fig. 5 is the enlarged diagram of C part in Fig. 3
Embodiment
As shown in Figure 1-Figure 3, a kind of open frame formula heat exchanger tube and tube sheet sealing weldering helium-leakage detecting apparatus, the cylindrical shell 1 and the base plate 2 that comprise carbon steel or low alloy steel, cylindrical shell 1 can be circle, Long Circle, rectangle, decide according to the shape of heat exchanger 21, the bottom welding of cylindrical shell 1 has base plate 2, is configured for placing the accommodating cavity of heat exchanger 21 with cylindrical shell 1.The end cover of the edges cover of the upper end of cylindrical shell 1 is connected with the edge seal of the upper end of cylindrical shell 1.End cover be provided with for heat exchanger tube sheet 22 sealing 23 of sealing mutually, therefore, when heat exchanger 21 is put into accommodating cavity, and with end cover sealed cylinder 1 edge, after sealing 23 sealing heat exchanger tube sheets 22, accommodating cavity has namely formed the space of sealing, thereby become the filling helium or contain the cavity of helium air, can carry out the helium leak test of several sealing welding lines in the outside of pipe/tube sheet sealing weldering, need not each sealing welding line is arranged cavity, operate relatively simple, and greatly improved the efficient that detects.
Sidewall on cylindrical shell 1 is provided with for the air intake opening 3 that detects gas toward the accommodating cavity filling, is used for the exhausr port 4 of exhaust.All welded pipeline on air intake opening 3 and exhausr port 4, valve has been housed respectively, as the control of air inlet or exhaust on pipeline.Tensimeter 5 also has been installed on cylindrical shell 1, the pressure in accommodating cavity has been detected, whether satisfied the detection needs to guarantee the pressure that detects gas in accommodating cavity.
as further preferred embodiment, the size of open heat exchanger 21 is generally all larger, therefore the volume of the accommodating cavity that surrounds of cylindrical shell 1 is also very large, the carbon steel or low alloy steel material surrounds length and highly all after larger cylindrical shell 1, deformation occurs very easily, cause part or whole distortion, not attractive in appearance on the one hand, the more important thing is after position that cylindrical shell 1 is connected with miscellaneous part deforms and just be difficult to realize again good being tightly connected, therefore some joist steel reinforcements 6 have been installed on the outer wall of cylindrical shell 1, structural strength and the rigidity of cylindrical shell 1 have been strengthened, prevent its distortion.In like manner, also be provided with stiffening rib 7 on the bottom of end cover, prevent to greatest extent its distortion.
As further preferred embodiment, as shown in Figure 5, the edge joint weld of cylindrical shell 1 upper end is connected to flange 8.End cover comprises the large end cap 9 that is connected with flange 8 by seal assembly, and large end cap 9 covers on flange 8.As shown in Figure 4, large end cap 9 is provided with the opening that heat exchanger tube sheet 22 stretches out, the edge of opening is welded and fixed and connects tube sheet sealing bore 10, the upper end of tube sheet sealing bore 10 is fixed with small end cover 11, small end cover 11 is an annular, fits with heat exchanger tube sheet 22 in its bottom, and the inboard of its annular is sealing 23, when helium leak test, the upper end of sealing 23 and heat exchanger tube sheet 22 welded and passed through welded seal, realizing the sealing of accommodating cavity.After helium leak test is complete, weld grinding is fallen to get final product, small end cover 11 can be recycled like this.
As further preferred embodiment, as shown in Figure 5, flange 8 with the joint face of large end cap 9 on be provided with groove 12, seal assembly comprises O RunddichtringO 13 and the clamping screw 14 that is arranged in groove 12, when clamping screw 14 was locked flange 8 with large end cap 9, press seal circle 13 made it to realize flange 8 and the mutual sealing between end cap 9 greatly.
As further preferred embodiment, what on large end cap 9, confession clamping screw 14 passed is oblong bolt hole, even cylindrical shell 1 has slight distortion, clamping screw 14 also can penetrate the bolt hole on large end cap 9, thus joint flange 8.
As shown in Figure 1-Figure 3, as further preferred embodiment, be provided with the locating device 15 for heat exchanger 21 contrapositions in accommodating cavity, locating device 15 is arranged on cylindrical shell 1 inwall.This locating device 15 all has installation in the left, right, front and rear of cylindrical shell 1, and by after adjusting locating device 15 and guaranteeing that heat exchanger 21 is placed, heat exchanger tube sheet 22 and tube sheet sealing bore 10 can accurately centerings, thereby obtain outstanding sealing effectiveness.
As further preferred embodiment, on the large end cap 9 of end cover, safety valve 16 has been installed, when the pressure of accommodating cavity surpasses when arranging, safety valve 16 is automatically opened portion gas is discharged to lower internal pressure, support equipment and personal safety.
As further preferred embodiment, cylindrical shell 1 is provided with the gas sample mouth 17 that is communicated with accommodating cavity, and the detection gas that the user obtains in accommodating cavity in can gas sample mouth 17 carries out the inspection of purity, concentration etc.This gas sample mouth 17 can be arranged on end cover equally.
As further preferred embodiment, base plate 2 upper surfaces are coated with one deck stainless sheet steel 18, contact with heat exchanger 21 in supporting hot interchanger 21, prevent that heat exchanger 21 from contacting the iron contamination of the stainless steel that produces heat exchanger 21 with base plate 2.
As further preferred embodiment, cylindrical shell 1 outer wall is provided with the cylindrical shell hanger 19 for lifting, and end cover is provided with the end cap hanger 20 for lifting.
The workflow of this device is such: heat exchanger 21 liftings are advanced in the accommodating cavity of cylindrical shell 1, locate by locating device 15 and make it the location; The installation end cap assemblies makes large end cap 9 and flange 8 lock sealings; The sealing 23 of small end cover 11 and heat exchanger tube sheet 22 welded seals, make accommodating cavity form as the filling helium or contain the cavity of helium air; At air intake opening 3 filling helium or contain the helium air to certain pressure, seal the weldering leak detection at the annular opening place of small end cover 11.
The above be the utility model preferred embodiment, it does not consist of the restriction to the utility model protection domain.
Claims (10)
1. an open frame formula heat exchanger tube and tube sheet sealing weldering helium-leakage detecting apparatus, it is characterized in that: comprise the accommodating cavity and the end cover that is covered in cylindrical shell (1) upper end that are used for placing heat exchanger that are consisted of by cylindrical shell (1), base plate (2), described cylindrical shell (1) is provided with the tensimeter (5) for the air intake opening (3) that detects gas toward the accommodating cavity filling, the exhausr port (4) that is used for exhaust and detection accommodating cavity pressure, and described end cover is provided with for the sealing (23) that mutually seals with the heat exchanger tube sheet.
2. helium-leakage detecting apparatus is welded in the sealing of open frame formula heat exchanger tube according to claim 1 and tube sheet, and it is characterized in that: described cylindrical shell (1) is provided with reinforcement (6), and described end cover is provided with stiffening rib (7).
3. helium-leakage detecting apparatus is welded in the sealing of open frame formula heat exchanger tube according to claim 1 and 2 and tube sheet, it is characterized in that: the edge of described cylindrical shell (1) upper end is provided with flange (8), and described end cover comprises the large end cap (9) that is connected with flange (8) by seal assembly; Described large end cap (9) is provided with the opening that the heat exchanger tube sheet stretches out, the edge of described opening is fixedly connected with tube sheet sealing bore (10), the upper end of described tube sheet sealing bore (10) is fixed with small end cover (11), and described sealing (23) comprises that small end cover (11) is used for the inboard with heat exchanger tube sheet welded seal.
4. helium-leakage detecting apparatus is welded in the sealing of open frame formula heat exchanger tube according to claim 3 and tube sheet, it is characterized in that: described flange (8) with the joint face of large end cap (9) on be provided with groove (12), described seal assembly comprises the O RunddichtringO (13) that is arranged in groove (12) and is used for locking flange (8) with large end cap (9) thereby the clamping screw (14) of press seal circle (13).
5. open frame formula heat exchanger tube according to claim 4 and tube sheet sealing weldering helium-leakage detecting apparatus is characterized in that: described large end cap (9) is upper is oblong bolt hole for what clamping screw (14) passed.
6. helium-leakage detecting apparatus is welded in the sealing of open frame formula heat exchanger tube according to claim 1 and tube sheet, it is characterized in that: be provided with the locating device (15) for the heat exchanger contraposition in described accommodating cavity, described locating device (15) is arranged on cylindrical shell (1) inwall.
7. helium-leakage detecting apparatus is welded in the sealing of open frame formula heat exchanger tube according to claim 1 and tube sheet, and it is characterized in that: described end cover is provided with safety valve (16).
8. helium-leakage detecting apparatus is welded in the sealing of according to claim 1 or 6 or 7 described open frame formula heat exchanger tubes and tube sheet, it is characterized in that: described cylindrical shell (1) or end cover are provided with the gas sample mouth (17) that is communicated with accommodating cavity.
9. open frame formula heat exchanger tube according to claim 1 and tube sheet sealing weldering helium-leakage detecting apparatus is characterized in that: described base plate (2) upper surface is coated with and contact the also stainless sheet steel (18) of supporting hot interchanger with heat exchanger.
10. helium-leakage detecting apparatus is welded in the sealing of according to claim 1 or 9 described open frame formula heat exchanger tubes according to claim 1 and tube sheet, it is characterized in that: described cylindrical shell (1) outer wall is provided with the cylindrical shell hanger (19) for lifting, and described end cover is provided with the end cap hanger (20) for lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610165 CN202938970U (en) | 2012-11-16 | 2012-11-16 | Device for detecting helium leakage of seal welding of pipes and pipe sheets of framework open type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610165 CN202938970U (en) | 2012-11-16 | 2012-11-16 | Device for detecting helium leakage of seal welding of pipes and pipe sheets of framework open type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202938970U true CN202938970U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220610165 Expired - Lifetime CN202938970U (en) | 2012-11-16 | 2012-11-16 | Device for detecting helium leakage of seal welding of pipes and pipe sheets of framework open type heat exchanger |
Country Status (1)
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|---|---|
| CN (1) | CN202938970U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251762A (en) * | 2014-09-28 | 2014-12-31 | 安徽舜禹水务实业有限公司 | Water leakage detection device of stamped and welded stainless steel water tank |
| CN105466647A (en) * | 2015-11-18 | 2016-04-06 | 长春轨道客车股份有限公司 | Bogie gas tightness detection device and detection method thereof |
| CN106767114A (en) * | 2016-12-14 | 2017-05-31 | 东方电气集团东方电机有限公司 | A kind of hydrogen seal structure for being applied to steam turbine generator |
-
2012
- 2012-11-16 CN CN 201220610165 patent/CN202938970U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251762A (en) * | 2014-09-28 | 2014-12-31 | 安徽舜禹水务实业有限公司 | Water leakage detection device of stamped and welded stainless steel water tank |
| CN105466647A (en) * | 2015-11-18 | 2016-04-06 | 长春轨道客车股份有限公司 | Bogie gas tightness detection device and detection method thereof |
| CN106767114A (en) * | 2016-12-14 | 2017-05-31 | 东方电气集团东方电机有限公司 | A kind of hydrogen seal structure for being applied to steam turbine generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
|
| CX01 | Expiry of patent term |