CN103776594A - Device and method for detecting welding quality of single boiler convective tube - Google Patents
Device and method for detecting welding quality of single boiler convective tube Download PDFInfo
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- CN103776594A CN103776594A CN201410078047.XA CN201410078047A CN103776594A CN 103776594 A CN103776594 A CN 103776594A CN 201410078047 A CN201410078047 A CN 201410078047A CN 103776594 A CN103776594 A CN 103776594A
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Abstract
The invention provides a device for detecting welding quality of a single boiler convective tube. The method for detecting welding quality of the single boiler convective tube comprises a jack and further comprises a pressure fluid transfer device, a supporting steel tube and an arc steel plate. One end of the pressure fluid transfer device is provided with a concave chamber, the end surface of the outer edge of the concave chamber at the end is identical to the inner cavity wall of a steam pocket in curvature and can be bonded to the inner cavity wall, and the end surface is provided with a groove mounted with a seal ring; a conveying channel penetrates the pressure fluid transfer device, one end of the conveying channel is disposed on a tube end opening of a convection tube to be detected, and the other end is connected with a nozzle; a positioning ring is arranged below the tube end opening on the tube. The invention also provides a method for detecting welding quality of the single boiler convective tube. The device for detecting welding quality of the single boiler convective tube has the advantages of being easy to machine, safe and reliable to use and easy to assemble and disassemble and the like. The device for detecting welding quality of the single boiler convective tube can be used without replacing parts and widely applied to a hydrostatic test of the single welded boiler convective tube of different sizes in a boiler equipment installation process.
Description
Technical field
The present invention relates to energy conversion field, particularly a kind of device and method that detects single boiler convection tube welding quality.
Background technology
In install at the scene of boiler, need to two drums be communicated with the comb of many steel pipes (convection tube) composition, the two ends of every convection tube form and are tightly connected with corresponding connection mouth welding reserved on two drums to be communicated with respectively, are welded on weld bond (15) and locate to implement (see figure 1).
Manufacture in installation process at boiler, need to solve boiler convection tube welding quality and carry out a difficult problem of confirming in time.Such as No. 20 weldless steel tube manufactures of φ 51 × 3.5 for the convection tube of certain engineering construction, longitudinally arrange 36 rows along drum, lateral arrangement 16 is arranged, pipe transverse pitch 74mm, longitudinal pitch 98mm, the long 80mm of drum tube joint.Because comb is vertical transversely arranged tight, per pass weld bond approximately has the vision blind spot of 15mm left and right, and welding quality is difficult to guarantee, the deficiency simultaneously existing due to existing Dynamic Non-Destruction Measurement, and inconvenience detects in time, and has testing result possibility problem of dtmf distortion DTMF; As while utilizing ray Non-Destructive Testing, need workmen to withdraw scene, and testing result lags behind, and greatly extends the construction period and reduces operating efficiency, and testing cost is larger.As confirmed not in time welding quality, until there is problems of welded quality when boiler Hydrostatic test, especially be positioned at compared with the soldered in centre position and occur quality problems, outside how must be arranged to the convection tube having welded so cuts off, could reprocess defective in quality weld seam, cause later welding quality to be for the second time more difficult to guarantee.
Through retrieval, at Chinese patent application prospectus CN202580378U, a kind of " for the internal-expansion type sealing and connecting device of pipeline pressure test " disclosed, but it is generally used for internal diameter and is less than DN50 pipeline, the pick-up unit of the necessary corresponding a kind of specification of each internal diameter, there is the flimsy accessory of multiple appearances in this device simultaneously, in use needs to change.
Summary of the invention
Based on the deficiencies in the prior art, one of the problem to be solved in the present invention is to provide a kind of device that detects single boiler convection tube welding quality.
Two of the problem to be solved in the present invention is to provide a kind of method that detects single boiler convection tube welding quality.
For one of solving the problems of the technologies described above, the invention provides a kind of device that detects single boiler convection tube welding quality, comprise lifting jack, also comprise pressure fluid transmitter, supporting steel pipe and curved plate; Described pressure fluid transmitter one end has concave shaped cavity, and the end face at concave shaped cavity outer rim place is consistent with drum internal chamber wall curvature and can fit on described internal chamber wall described in this end, and this end face is provided with the groove that O-ring seal has been installed; There is the transfer passage of perforation described pressure fluid transmitter inside, and described transfer passage one end is arranged in the pipe port of convection tube to be measured while being use, and the other end is connection mouth; The body of described pipe port bottom is provided with locating ring; When use, the telescopic end of described lifting jack is with the other end contact of described pressure fluid transmitter; One end contacts with the base of lifting jack with the other end of the supporting steel pipe of curved plate welding.
As the improvement on the one hand of a kind of device that detects single boiler convection tube welding quality of the present invention: described pick-up unit also comprises and is placed in the unitor between lifting jack and supporting steel pipe while use, this unitor has steel plate, described steel plate one side is fixed with the first spacing collar for putting into lifting jack telescopic end, and described steel plate another side is fixed with the second spacing collar for putting into the pressure fluid transmitter other end.This unitor can guarantee that the position of lifting jack and pressure fluid transmitter is relative fixing, so that transmission of pressure better.
For address the above problem two, the invention provides a kind of method that detects single boiler convection tube welding quality, it comprises the following steps:
(a) for two ends respectively with the convection tube to be measured of steamdrum and water drum welding, in the steamdrum of this convection tube end positions to be measured and water drum, described pick-up unit is installed respectively; Mounting means is: supporting steel pipe, lifting jack, pressure fluid transmitter connect successively, or supporting steel pipe, unitor, lifting jack, pressure fluid transmitter connect successively, the end face at pressure fluid transmitter concave shaped cavity outer rim place fits on drum internal chamber wall, and described pipe port is arranged in convection tube to be measured and locating ring is also arranged in convection tube to be measured and pressure fluid transmitter can not be radially wobbled with respect to convection tube to be measured; The curved plate of supporting steel pipe one end is placed on the drum inwall of convection tube offside to be measured;
(b) operation lifting jack, forms compressing to described pressure fluid transmitter, makes pressure fluid transmitter port and the drum internal chamber wall close contact of O-ring seal, and formation is tightly connected;
(c) by the connection mouth sealing of the pick-up unit in one of them drum, the connection mouth of pick-up unit in another drum is connected with water under high pressure joint; In convection tube to be measured, inject water under high pressure, keep inner pipe water pressure to be no less than five minutes;
(d) whether have drainage, realize the detection of the welding quality to convection tube to be measured if observing convection tube to be measured welding position.
Compared with prior art, the present invention has the advantages such as handling ease, safe and reliable, easy accessibility, in use, without changing accessory, can be widely used in the rear single hydraulic testing of boiler convection tube welding of all size in boiler plant installation process.
Describe the present invention in detail below in conjunction with accompanying drawing, it illustrates principle of the present invention as the part of this instructions by embodiment, and other aspects of the present invention, feature and advantage thereof will become very clear by this detailed description.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of pressure fluid transmitter in the present invention.
In Fig. 1-2, the corresponding relation of Reference numeral is:
1-pipe port, 2-locating ring, 3-O-ring seal,
4-pressure fluid transmitter, 5-transfer passage, 6-connection mouth,
7-convection tube to be measured,
8-drum, 9-the second spacing collar, 10-steel plate,
11-the first spacing collar, 12-lifting jack, 13-supporting steel pipe,
14-curved plate, 15-weld bond.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Below in conjunction with embodiment, the present invention is described further.It shown in Fig. 1, is the structural representation of a kind of device that detects single boiler convection tube welding quality of the present invention.For for purpose of brevity, the substructure of this pick-up unit is only shown in figure, omit the superstructure of symmetry with it.Fig. 2 is the structural representation of pressure fluid transmitter 4.
As depicted in figs. 1 and 2, a kind of device that detects single boiler convection tube welding quality, comprises lifting jack 12, also comprises pressure fluid transmitter 4, supporting steel pipe 13 and curved plate 14; Described pressure fluid transmitter 4 one end have concave shaped cavity, and the end face at concave shaped cavity outer rim place is consistent with drum 8 internal chamber wall curvatures and can fit on described internal chamber wall described in this end, and this end face is provided with the groove that O-ring seal 3 has been installed; There is the transfer passage 5 of perforation described pressure fluid transmitter 4 inside, and described transfer passage 5 one end are arranged in the pipe port 1 of convection tube 7 to be measured while being use, and the other end is connection mouth 6; The body of described pipe port 1 bottom is provided with locating ring 2; When use, the telescopic end of described lifting jack 12 is with the other end contact of described pressure fluid transmitter 4; The other end of the supporting steel pipe 13 that weld with curved plate 14 one end is with the base contact of lifting jack 12.
While also comprising use in above-mentioned detection device, be placed in the unitor between lifting jack 12 and supporting steel pipe 13, this unitor has steel plate 10, described steel plate 10 one sides are fixed with the first spacing collar 11 for putting into lifting jack 12 telescopic ends, and described steel plate 10 another sides are fixed with the second spacing collar 9 for putting into pressure fluid transmitter 4 other ends.
The present invention provides a kind of method that adopts said apparatus to detect single boiler convection tube welding quality simultaneously, and it comprises the following steps:
(a) for two ends respectively with the convection tube to be measured 7 of steamdrum and water drum welding, in the steamdrum of these convection tube 7 end positions to be measured and water drum, described pick-up unit is installed respectively; Mounting means is: supporting steel pipe 13, lifting jack 12, pressure fluid transmitter 4 connect successively, or supporting steel pipe 13, unitor, lifting jack 12, pressure fluid transmitter 4 connect successively, the end face at pressure fluid transmitter 4 concave shaped cavity outer rim places fits on drum 8 internal chamber walls, and described pipe port 1 is arranged in convection tube 7 to be measured and locating ring 2 is also arranged in convection tube 7 to be measured and pressure fluid transmitter 4 can not be radially wobbled with respect to convection tube 7 to be measured; The curved plate 14 of supporting steel pipe 13 one end is placed on drum 8 inwalls of convection tube 7 offsides to be measured;
(b) operation lifting jack 12, forms compressing to described pressure fluid transmitter 4, makes pressure fluid transmitter 4 ports and the drum 8 internal chamber wall close contacts of O-ring seal 3, and formation is tightly connected;
(c) connection mouth of the pick-up unit in one of them drum 6 is sealed, the connection mouth 6 of pick-up unit in another drum is connected with water under high pressure joint; In convection tube 7 to be measured, inject water under high pressure, keep inner pipe water pressure to be no less than five minutes (1.25 times that pressure is drum operating pressure); Along with the rising of hydraulic testing convection tube 7 internal pressures to be measured, suitably regulate lifting jack 12, several tons of pressure of formation while making counteracted by pressure that lifting jack 12 produces carry out pressure test, and O-ring seal 3 produce compared with large elastic dilatation and with drum 8 inwall close contacts, guarantee sealing intact to meet the shutoff requirement of the hydraulic testing;
(d) whether have drainage, realize the detection of the welding quality to convection tube 7 to be measured if observing convection tube to be measured 7 welding positions.As have or not drainage, and illustrate that this convection tube 7 to be measured is qualified, can continue welding pipeline around; If any drainage, need to check, after problem to be solved, then continue to detect with this pick-up unit, until qualified.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a device that detects single boiler convection tube welding quality, comprises lifting jack (12), it is characterized in that: also comprise pressure fluid transmitter (4), supporting steel pipe (13) and curved plate (14); Described pressure fluid transmitter (4) one end has concave shaped cavity, and the end face at concave shaped cavity outer rim place is consistent with drum (8) internal chamber wall curvature and can fit on described internal chamber wall described in this end, and this end face is provided with the groove that O-ring seal (3) have been installed; There is the transfer passage (5) of perforation described pressure fluid transmitter (4) inside, and described transfer passage (5) one end is arranged in the pipe port (1) of convection tube to be measured (7) while being use, and the other end is connection mouth (6); The body of described pipe port (1) bottom is provided with locating ring (2); When use, the telescopic end of described lifting jack (12) is with the other end contact of described pressure fluid transmitter (4); The base contact of the same lifting jack of the other end (12) of the supporting steel pipe (13) of the same curved plate in one end (14) welding.
2. the device of the single boiler convection tube of detection according to claim 1 welding quality, it is characterized in that, it is placed in the unitor between lifting jack (12) and supporting steel pipe (13) while also comprising use, this unitor has steel plate (10), described steel plate (10) one side is fixed with the first spacing collar (11) for putting into lifting jack (12) telescopic end, and described steel plate (10) another side is fixed with the second spacing collar (9) for putting into pressure fluid transmitter (4) other end.
3. adopt device described in claim 1 or 2 to detect a method for single boiler convection tube welding quality, it is characterized in that, comprise the following steps:
(a) for two ends respectively with the convection tube to be measured (7) of steamdrum and water drum welding, in the steamdrum of this convection tube to be measured (7) end positions and water drum, described pick-up unit is installed respectively; Mounting means is: supporting steel pipe (13), lifting jack (12), pressure fluid transmitter (4) connect successively, or supporting steel pipe (13), unitor, lifting jack (12), pressure fluid transmitter (4) connect successively, the end face at pressure fluid transmitter (4) concave shaped cavity outer rim place fits on drum (8) internal chamber wall, and described pipe port (1) is arranged in convection tube to be measured (7) and locating ring (2) is also arranged in convection tube to be measured (7) and pressure fluid transmitter (4) can not be radially wobbled with respect to convection tube to be measured (7); The curved plate (14) of supporting steel pipe (13) one end is placed on drum (8) inwall of convection tube to be measured (7) offside;
(b) operation lifting jack (12), forms compressing to described pressure fluid transmitter (4), makes pressure fluid transmitter (4) port and drum (8) the internal chamber wall close contact of O-ring seal (3), and formation is tightly connected;
(c) by the connection mouth of the pick-up unit in one of them drum (6) sealing, the connection mouth (6) of pick-up unit in another drum is connected with water under high pressure joint; In convection tube to be measured (7), inject water under high pressure, keep inner pipe water pressure to be no less than five minutes;
(d) whether have drainage, realize the detection of the welding quality to convection tube to be measured (7) if observing convection tube to be measured (7) welding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078047.XA CN103776594B (en) | 2014-03-05 | 2014-03-05 | A kind of device and method detecting single boiler convection sealing of tube quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078047.XA CN103776594B (en) | 2014-03-05 | 2014-03-05 | A kind of device and method detecting single boiler convection sealing of tube quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103776594A true CN103776594A (en) | 2014-05-07 |
| CN103776594B CN103776594B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410078047.XA Active CN103776594B (en) | 2014-03-05 | 2014-03-05 | A kind of device and method detecting single boiler convection sealing of tube quality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941438A (en) * | 2017-12-22 | 2018-04-20 | 南京新核复合材料有限公司 | A kind of device and detection method for detecting sealing leakage in GRP pipe hand paste |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997037206A1 (en) * | 1996-04-02 | 1997-10-09 | Guy Berube | Weld testing assembly |
| CN2276621Y (en) * | 1996-03-31 | 1998-03-18 | 李百忍 | Heat pipe phase change type no-dirt water heater |
| CN201302524Y (en) * | 2008-10-10 | 2009-09-02 | 安徽海螺川崎节能设备制造有限公司 | Water-pressure test unit for large-diameter thick-wall pipe joint of boiler-steam dome |
| JP2011141085A (en) * | 2010-01-07 | 2011-07-21 | Chugoku Electric Power Co Inc:The | Tube leakage detection method |
| CN202580378U (en) * | 2012-05-14 | 2012-12-05 | 湖南省工业设备安装有限公司 | Internal expanding type sealing connection device for pipeline pressure test |
| CN203745149U (en) * | 2014-03-05 | 2014-07-30 | 湖南省工业设备安装有限公司 | Device for detecting welding quality of single boiler convection tube |
-
2014
- 2014-03-05 CN CN201410078047.XA patent/CN103776594B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2276621Y (en) * | 1996-03-31 | 1998-03-18 | 李百忍 | Heat pipe phase change type no-dirt water heater |
| WO1997037206A1 (en) * | 1996-04-02 | 1997-10-09 | Guy Berube | Weld testing assembly |
| CN201302524Y (en) * | 2008-10-10 | 2009-09-02 | 安徽海螺川崎节能设备制造有限公司 | Water-pressure test unit for large-diameter thick-wall pipe joint of boiler-steam dome |
| JP2011141085A (en) * | 2010-01-07 | 2011-07-21 | Chugoku Electric Power Co Inc:The | Tube leakage detection method |
| CN202580378U (en) * | 2012-05-14 | 2012-12-05 | 湖南省工业设备安装有限公司 | Internal expanding type sealing connection device for pipeline pressure test |
| CN203745149U (en) * | 2014-03-05 | 2014-07-30 | 湖南省工业设备安装有限公司 | Device for detecting welding quality of single boiler convection tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941438A (en) * | 2017-12-22 | 2018-04-20 | 南京新核复合材料有限公司 | A kind of device and detection method for detecting sealing leakage in GRP pipe hand paste |
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| CN103776594B (en) | 2016-08-24 |
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