CN216326093U - Metal sealing ring welding tool at medium inlet and outlet of plate heat exchanger - Google Patents
Metal sealing ring welding tool at medium inlet and outlet of plate heat exchanger Download PDFInfo
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- CN216326093U CN216326093U CN202122581522.3U CN202122581522U CN216326093U CN 216326093 U CN216326093 U CN 216326093U CN 202122581522 U CN202122581522 U CN 202122581522U CN 216326093 U CN216326093 U CN 216326093U
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Abstract
The utility model discloses a metal sealing ring welding tool which comprises an outer compression ring and an inner support tool, wherein the outer compression ring is positioned above a sealing ring to be welded, the inner support tool comprises a left support ring and a right support ring, a left base plate is arranged on the inner wall of the left support ring, the left base plate is in threaded connection with a connector through a left-handed support rod, a right base plate is arranged on the inner wall of the right support ring, and the right support ring is in threaded connection with the connector through a right-handed support rod; the connector drives the left-handed support rod and the right-handed support rod to move in the same direction or in the opposite direction when rotating. According to the utility model, the inner support tool is arranged on the side wall of the inner ring of the sealing ring to be welded, and the sealing ring is tightly attached to the pressure plate by adjusting the distance between the left support ring and the right support ring, so that the sealing ring is not easy to deform in the welding process. The outer clamp ring is arranged on the upper portion of the sealing ring, a relatively closed space is formed around the welding seam by the outer clamp ring, the inner support tool and the welding gun, gas diffusion can be prevented, the welding seam is effectively protected, and welding quality is improved.
Description
Technical Field
The utility model relates to the technical field of heat exchange equipment, in particular to a metal sealing ring welding tool at a medium inlet and a medium outlet of a plate heat exchanger.
Background
The plate heat exchanger is widely applied to the fields of nuclear power/electric power, ships, metallurgy, chemical industry, food and drug, heating and the like. The metal sealing rings arranged at the medium inlet and the medium outlet of the heat exchanger are a flow guide and sealing structure of a flow passage of the heat exchanger, the metal sealing rings are made of 316L, 304 and TA2, the thickness of the metal sealing rings is smaller than 3mm, manual argon arc welding is used for welding, and a welding joint belongs to a fillet weld form. Under the harsh use environment of high/low temperature, strong pressure, corrosivity and other media, the welding part of the metal sealing ring becomes a weak link of the plate heat exchanger. The heat exchanger leakage caused by the quality problem of the metal sealing ring welding seam at the medium inlet and the medium outlet greatly influences the use of the plate heat exchanger.
Through experimental analysis, the main reasons for the leakage of the sealing ring are: the sealing ring is deformed in the welding process, and the welding seam is oxidized. On one hand, due to the lack of gas accumulation measures in the welding process, protective gas in a welding area is rapidly diffused to the periphery, so that the defects of surface oxidation, air holes and the like are easily generated, the corrosion resistance of a welding line in a medium environment is rapidly reduced, and leakage is caused; on the other hand, the thickness of the metal sealing ring is less than 3mm, and the problem of welding deformation of the thin plate is particularly prominent. Statistical data show that the leakage rate caused by the deformation of the backing ring after welding is up to 20%; moreover, the high temperature zone around the weld joint is limited by the structure, material and size of the sealing ring, and it is difficult to effectively protect the gas and control the deformation of the weld joint root during welding, resulting in oxidation and deformation during welding. To sum up, it is very necessary to design the metal sealing ring welding deformation prevention and gas protection tool, so that the primary qualification rate of the welding seam of the metal sealing ring is improved, the leakage problem of the metal sealing ring is thoroughly solved, and the service life of the plate heat exchanger is prolonged.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a metal sealing ring welding tool at a medium inlet and a medium outlet of a plate heat exchanger, and aims to solve the problem that the metal sealing ring is easy to deform during welding and replacement, so that the use effect of the plate heat exchanger is influenced.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a metal sealing ring welding tool at a medium inlet and a medium outlet of a plate heat exchanger comprises an outer compression ring fixed on a heat exchanger pressing plate through a bolt and an inner support tool installed in the inner ring of a sealing ring, wherein the outer compression ring is positioned above the sealing ring to be welded, and the diameter of an inner hole of the outer compression ring is larger than that of the inner hole of the sealing ring and smaller than the outer diameter of the sealing ring; the inner support tool comprises a left support ring and a right support ring which are semi-circular and symmetrically arranged, and the outer edge radius of the left support ring and the right support ring is matched with the inner hole radius of the sealing ring; the inner wall of the left supporting ring is provided with a left base plate, one end of a left-handed stay bar is connected with the middle part of the left base plate, the other end of the left-handed stay bar is in threaded connection with one end of a central threaded hole of the connector, the inner wall of the right supporting ring is provided with a right base plate, one end of a right-handed stay bar is connected with the middle part of the right base plate, and the other end of the right-handed stay bar is in threaded connection with the other end of the central threaded hole of the connector; the connector drives the left-handed support rod and the right-handed support rod to move in the same direction or in the opposite direction when rotating.
Preferably, the left base plate is fixed on the inner wall of the left support ring through a bolt, the right base plate is fixed on the inner wall of the right support ring through a bolt, and the left base plate and the right base plate are both arc-shaped.
Preferably, the adjacent positions of the two ends of the left supporting ring and the right supporting ring are symmetrically provided with connecting blocks which are staggered and overlapped up and down.
Preferably, the upper part of the inner wall of the outer compression ring is provided with a chamfer, and the lower part of the inner wall forms a blunt edge.
Preferably, a plurality of threaded holes are formed in the outer compression ring.
Preferably, one end of the left-handed stay bar is welded in the middle of the inner wall of the left base plate; one end of the right-handed stay bar is welded in the middle of the inner wall of the right backing plate.
The using method of the utility model comprises the following steps:
before welding, an operator firstly installs the sealing ring to be welded on the pressure plate of the heat exchanger. Then the left supporting ring, the left base plate, the left rotating supporting rod, the right supporting ring, the right base plate and the right rotating supporting rod are respectively connected with a connector, the connector is rotated to enable the left rotating supporting rod and the right rotating supporting rod to move in opposite directions, the diameter of a circular ring formed by the left supporting ring and the right supporting ring is enabled to be minimum, and the circular ring is placed in an inner ring of the sealing ring; the connector is rotated once more by the operating personnel to enable the left-handed support rod and the right-handed support rod to move in the opposite direction, and the outer walls of the left support ring and the right support ring are abutted to the inner wall of the sealing ring. The operating personnel passes through the bolt with outer clamp ring and installs on the clamp plate, the position of adjustment sealing ring upper plate, confirms the width of adjusting the welding seam, fastens outer clamp ring. The operator begins welding the weld. After the welding is finished, the operating personnel rotate the connector to enable the left-handed support rod and the right-handed support rod to move in opposite directions, the left support ring and the right support ring are separated from the inner wall of the sealing ring, and the sealing ring is welded.
According to the utility model, the inner support tool is arranged on the side wall of the inner ring of the sealing ring to be welded, and the sealing ring is tightly attached to the pressure plate by adjusting the distance between the left support ring and the right support ring, so that the sealing ring is not easy to deform in the welding process. The outer clamp ring is arranged on the upper portion of the sealing ring, a relatively closed space is formed around the welding seam by the outer clamp ring, the inner support tool and the welding gun, gas diffusion can be prevented, the welding seam is effectively protected, and welding quality is improved.
According to the utility model, the upper part of the inner wall of the outer pressing ring is provided with the chamfer, and the lower part of the inner wall of the outer pressing ring forms the truncated edge, so that a welding gun can accurately align to a welding line to perform welding operation in the welding process, the deformation caused by heating the root part of the welding line in the welding process can be effectively prevented, and the welding precision and quality are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the inner support tool of FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic structural view of the outer clamp ring of FIG. 1;
FIG. 5 is a cross-sectional view of the outer clamp ring of FIG. 4;
in the figure: 1. outer clamp ring, 2, clamp plate, 3, sealing ring, 4, internal stay frock, 5, linking piece, 6, left side prop the ring, 7, left backing plate, 8, left side vaulting pole, 9, connector, 10, dextrorotation vaulting pole, 11, right side prop the ring, 12, right backing plate, 13, screw hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the metal sealing ring welding tool for the medium inlet and outlet of the plate heat exchanger comprises an outer clamp ring 1 fixed on a heat exchanger pressure plate 2 through a bolt and an inner support tool 4 installed in an inner ring of a sealing ring 3, wherein the outer clamp ring 1 is positioned above the sealing ring 3 to be welded, and the diameter of an inner hole of the outer clamp ring 1 is larger than that of the inner hole of the sealing ring 3 and smaller than the outer diameter of the sealing ring 3; the inner support tool 4 comprises a left support ring 6 and a right support ring 11 which are semicircular and symmetrically arranged, and the outer edge radius of the left support ring 6 and the outer edge radius of the right support ring 11 are matched with the inner hole radius of the sealing ring 3; a left base plate 7 is installed on the inner wall of the left support ring 6, one end of a left support rod 8 is connected with the middle part of the left base plate 7, the other end of the left support rod 8 is in threaded connection with one end of a central threaded hole of a connector 9, a right base plate 12 is installed on the inner wall of a right support ring 11, one end of a right support rod 10 is connected with the middle part of the right base plate 12, and the other end of the right support rod 10 is in threaded connection with the other end of the central threaded hole of the connector 9; the connector 9 drives the left-handed support rod 8 and the right-handed support rod 10 to move in the same direction or in the opposite direction when rotating.
The left base plate 7 is fixed on the inner wall of the left support ring 6 through bolts, the right base plate 12 is fixed on the inner wall of the right support ring 11 through bolts, and the left base plate 7 and the right base plate 12 are both arc-shaped.
The adjacent positions of the two ends of the left support ring 6 and the right support ring 11 are symmetrically provided with connecting blocks 5 which are staggered and overlapped up and down.
The upper part of the inner wall of the outer compression ring 1 is provided with a chamfer, and the lower part of the inner wall forms a blunt edge.
A plurality of threaded holes 13 are formed in the outer compression ring 1.
One end of the left-handed stay bar 8 is welded in the middle of the inner wall of the left base plate 7; one end of the right-handed stay bar 10 is welded to the middle of the inner wall of the right backing plate 12.
The using method of the utility model comprises the following steps:
before welding, an operator firstly installs the sealing ring 3 to be welded on the heat exchanger pressure plate 2. Then a left supporting ring 6, a left base plate 7, a left supporting rod 8, a connector 9, a right supporting ring 11, a right base plate 12 and a right supporting rod 10 are assembled, the connector 9 is rotated to enable the left supporting rod 8 and the right supporting rod 10 to move oppositely, the diameter of a circular ring formed by the left supporting ring 6 and the right supporting ring 11 is enabled to be minimum, and the circular ring is placed in an inner ring of the sealing ring 3; the operator rotates the connector 9 again to make the left-handed brace 8 and the right-handed brace 10 move in opposite directions, and the outer walls of the left support ring 6 and the right support ring 11 are abutted against the inner wall of the sealing ring 3. The operating personnel passes through the bolt with outer clamp ring 1 and installs on clamp plate 2, adjusts the position of sealing ring 3 upper plate, confirms the width of adjusting the welding seam, fastens outer clamp ring 1. The operator begins welding the weld. After the welding is finished, the operator rotates the connector 9 to enable the left-handed support rod 8 and the right-handed support rod 10 to move oppositely, the left support ring 6 and the right support ring 11 are separated from the inner wall of the sealing ring 3, and the welding of the sealing ring is finished.
According to the utility model, the inner support tool is arranged on the side wall of the inner ring of the sealing ring to be welded, and the sealing ring is tightly attached to the pressure plate by adjusting the distance between the left support ring and the right support ring, so that the sealing ring is not easy to deform in the welding process. The outer clamp ring is arranged on the upper portion of the sealing ring, a relatively closed space is formed around the welding seam by the outer clamp ring, the inner support tool and the welding gun, gas diffusion can be prevented, the welding seam is effectively protected, and welding quality is improved.
Claims (6)
1. The utility model provides a plate heat exchanger medium inlet outlet department metal seal ring welding frock which characterized in that: the device comprises an outer compression ring (1) fixed on a heat exchanger pressure plate (2) through a bolt and an inner support tool (4) installed in an inner ring of a sealing ring (3), wherein the outer compression ring (1) is positioned above the sealing ring (3) to be welded, and the diameter of an inner hole of the outer compression ring (1) is larger than that of the inner hole of the sealing ring (3) and smaller than the outer diameter of the sealing ring (3); the inner support tool (4) comprises a left support ring (6) and a right support ring (11) which are semicircular and symmetrically arranged, and the outer edge radiuses of the left support ring (6) and the right support ring (11) are matched with the inner hole radius of the sealing ring (3); a left base plate (7) is mounted on the inner wall of the left support ring (6), one end of a left support rod (8) is connected with the middle part of the left base plate (7), the other end of the left support rod (8) is in threaded connection with one end of a central threaded hole of a connector (9), a right base plate (12) is mounted on the inner wall of the right support ring (11), one end of a right support rod (10) is connected with the middle part of the right base plate (12), and the other end of the right support rod (10) is in threaded connection with the other end of the central threaded hole of the connector (9); when the connector (9) rotates, the left-handed stay bar (8) and the right-handed stay bar (10) are driven to move in the same direction or in the opposite direction.
2. The plate heat exchanger medium inlet and outlet metal sealing ring welding tool of claim 1, characterized in that: the left backing plate (7) is fixed on the inner wall of the left support ring (6) through a bolt, the right backing plate (12) is fixed on the inner wall of the right support ring (11) through a bolt, and the left backing plate (7) and the right backing plate (12) are both arc-shaped.
3. The plate heat exchanger medium inlet and outlet metal sealing ring welding tool of claim 1 or 2, characterized in that: the adjacent positions of the two ends of the left supporting ring (6) and the right supporting ring (11) are symmetrically provided with connecting blocks (5) which are staggered and overlapped up and down.
4. The plate heat exchanger medium inlet and outlet metal sealing ring welding tool of claim 3, characterized in that: a chamfer is formed in the upper portion of the inner wall of the outer compression ring (1), and a blunt edge is formed in the lower portion of the inner wall.
5. The plate heat exchanger medium inlet and outlet metal sealing ring welding tool of claim 4, characterized in that: a plurality of threaded holes (13) are formed in the outer compression ring (1).
6. The plate heat exchanger medium inlet and outlet metal sealing ring welding tool of claim 5, characterized in that: one end of the left-handed stay bar (8) is welded in the middle of the inner wall of the left base plate (7); one end of the right-handed stay bar (10) is welded in the middle of the inner wall of the right backing plate (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122581522.3U CN216326093U (en) | 2021-10-26 | 2021-10-26 | Metal sealing ring welding tool at medium inlet and outlet of plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122581522.3U CN216326093U (en) | 2021-10-26 | 2021-10-26 | Metal sealing ring welding tool at medium inlet and outlet of plate heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216326093U true CN216326093U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122581522.3U Active CN216326093U (en) | 2021-10-26 | 2021-10-26 | Metal sealing ring welding tool at medium inlet and outlet of plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216326093U (en) |
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2021
- 2021-10-26 CN CN202122581522.3U patent/CN216326093U/en active Active
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