CN217775830U - Small-bore labyrinth piece frock of brazing - Google Patents
Small-bore labyrinth piece frock of brazing Download PDFInfo
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- CN217775830U CN217775830U CN202221496484.XU CN202221496484U CN217775830U CN 217775830 U CN217775830 U CN 217775830U CN 202221496484 U CN202221496484 U CN 202221496484U CN 217775830 U CN217775830 U CN 217775830U
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- labyrinth
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- pull rod
- brazing
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Abstract
The utility model relates to a small-bore maze piece frock of brazing has roof and bottom plate, treats brazed maze piece and is located between roof and the bottom plate, the bottom plate on the circumference equipartition have the location pull rod of medial surface laminating maze piece periphery, the circumference equipartition has the T-shaped piece that corresponds with the location pull rod on the roof, wear to be equipped with stud on the T-shaped piece, threaded connection on stud lower extreme and the location pull rod, the stud upper end is connected with the nut that hangs that compresses tightly on the T-shaped piece, is located the downthehole location dabber that is used for fixing a position maze piece hole that is equipped with upper end and roof connection of maze piece that is equipped with of maze piece. The utility model realizes the rapid positioning of the inner hole periphery of the labyrinth block through the positioning core shaft and the positioning pull rod, shortens the assembly time, improves the qualification rate of the brazing of the labyrinth block, and can ensure the processing size of the inner hole of the subsequent labyrinth block and the flatness of the excircle; and the positioning pull rod and the positioning mandrel can be replaced, so that the labyrinth blocks with various small calibers can share one set of tool, and the brazing tool cost is reduced.
Description
Technical Field
The utility model relates to a small-bore labyrinth piece frock of brazing.
Background
The labyrinth block is a core part of the labyrinth valve, multi-stage pressure reduction of fluid media is realized through a tortuous and turning flow channel formed in the labyrinth block, the labyrinth sheets with grooves of different shapes are welded by a brazing method to form a labyrinth block structure at present, and an inner hole of the labyrinth block is ground by a grinding processing method subsequently. Because the labyrinth piece is the sheet metal, there is little deformation before brazing, and the size and the position that the solid-liquid brazing filler metal caused the part are all can be changed at high temperature melting in the process of brazing simultaneously, and the brazing quality is unstable, and one-time qualification rate is lower, and labyrinth piece excircle hole can not reach the dimensional requirement.
In the existing brazing tool structure, because the labyrinth block with the diameter of more than 150mm is provided with the positioning rod, the labyrinth block is positioned by the positioning rod during brazing, and the labyrinth block with the inner hole of 60-150mm cannot be positioned by the positioning rod due to size limitation, the labyrinth piece is slightly deformed before brazing, and meanwhile, parts are easily deformed during high-temperature brazing, so that the subsequent machining size of the labyrinth block cannot be guaranteed, and the use of the labyrinth block is influenced.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: in order to overcome not enough among the prior art, the utility model provides a small-bore labyrinth piece frock of brazing to realize the quick location of small-bore labyrinth piece, solve the labyrinth piece and weld the preceding problem of contact failure between piece and the piece that warp and cause, improve the labyrinth piece qualification rate of brazing, guarantee the roughness of follow-up labyrinth piece internal hole machining size and excircle.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a small-bore labyrinth piece frock of brazing, has roof and bottom plate, treats that the labyrinth piece of brazing is located between roof and the bottom plate, the bottom plate on the circumference equipartition have the location pull rod of medial surface laminating labyrinth piece periphery, the circumference equipartition has the T-shaped piece that corresponds with the location pull rod on the roof, wear to be equipped with stud on the T-shaped piece, stud lower extreme and location pull rod upper end threaded connection, the stud upper end is connected with the nut that hangs that compresses tightly on the T-shaped piece, is located the downthehole positioning core axle that is used for fixing a position the labyrinth piece hole that is equipped with the upper end and is connected with the roof in the labyrinth piece.
The positioning mandrel is characterized in that four axial convex strips are uniformly distributed on the peripheral surface of the positioning mandrel in the circumferential direction, the outer side surfaces of the axial convex strips are matched with the inner hole of the labyrinth block, so that the contact area between the periphery of the positioning mandrel and the inner hole of the labyrinth block can be reduced, the inner hole positioning precision of the labyrinth block is better improved, and the tool can be recycled by changing the height of the axial convex strips.
Preferably, four positioning pull rods are connected between the top plate and the bottom plate, and arc surfaces attached to the outer peripheral surfaces of the labyrinth blocks are arranged on the inner side surfaces of the positioning pull rods, so that the outer circle positioning accuracy of the labyrinth blocks is improved better.
In order to realize quick installation, four step grooves are uniformly distributed on the top plate in the circumferential direction, and two ends of the horizontal section of the T-shaped block are clamped on steps of the step grooves; four I-shaped grooves are evenly distributed on the bottom plate in the circumferential direction, and the bottom end of the positioning pull rod is in clamping fit with the I-shaped grooves.
The beneficial effects of the utility model are that: the utility model realizes the quick positioning of the inner hole periphery of the labyrinth block through the positioning core shaft and the positioning pull rod, is convenient to align, shortens the assembly time, improves the brazing qualification rate of the labyrinth block and the grinding efficiency of the inner hole of the subsequent labyrinth block, and can ensure the processing size of the inner hole of the subsequent labyrinth block and the flatness of the excircle; and through changing the positioning pull rod and the positioning mandrel, the labyrinth blocks with various small calibers can share one set of tool, and the cost of the brazing tool is reduced.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
Fig. 3 is a schematic structural view of the top plate of the present invention.
Fig. 4 is a schematic structural diagram of the bottom plate of the present invention.
In the figure: 1. the novel steel plate comprises a top plate, 2 parts of a bottom plate, 3 parts of a labyrinth block, 4 parts of a positioning pull rod, 5.T parts of a block, 6 parts of a stud bolt, 7 parts of a hoisting nut, 8 parts of a positioning mandrel, 9 parts of an axial convex strip, 10 parts of a step groove and 11 parts of an I-shaped groove.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
The small-caliber labyrinth block brazing tool shown in fig. 1 to 4 comprises a top plate 1 and a bottom plate 2, wherein a labyrinth block 3 to be brazed is positioned between the top plate 1 and the bottom plate 2, and the labyrinth block 3 comprises an upper plate, a lower plate and a labyrinth piece clamped between the upper plate and the lower plate.
Four step grooves 10 are circumferentially and uniformly distributed on the top plate 1, four I-shaped grooves 11 corresponding to the step grooves 10 are circumferentially and uniformly distributed on the bottom plate 2, a positioning pull rod 4 is arranged between the step grooves 10 and the I-shaped grooves 11, and the inner side surface of the positioning pull rod 4 is provided with an arc surface which is attached to the outer peripheral surface of the labyrinth block 3.
The bottom end of the positioning pull rod 4 is in clamping fit with the I-shaped groove 11 through a bayonet; the T-shaped block 5 corresponding to the positioning pull rod 4 is circumferentially and evenly distributed on the top plate 1, two ends of a horizontal section of the T-shaped block 5 are clamped on steps of the step groove 10, a stud bolt 6 penetrates through a central hole of the T-shaped block 5, the lower end of the stud bolt 6 is in threaded connection with the upper end of the positioning pull rod 4, the upper end of the stud bolt 6 is connected with a hoisting nut 7 tightly pressed on the T-shaped block 5, and the positioning pull rod 4 is tightened through the hoisting nut 7 to clamp the labyrinth block 3 between the top plate 1 and the bottom plate 2.
Be located 3 insides of maze piece and be equipped with positioning core axle 8 that is used for fixing a position 3 holes of maze piece, 8 outer peripheral face circumference equipartitions of positioning core axle have four axial sand grips 9, the periphery and 3 hole cooperations of maze piece that the 9 lateral surfaces of axial sand grip formed, 8 upper ends of positioning core axle have the screw hole, 1 centers of roof are equipped with the fastening bolt with 8 threaded connection of positioning core axle.
When brazing, a high-temperature release agent (cubic boron nitride) is uniformly coated on the lower bottom surface of the top plate 1 surrounding the periphery of the labyrinth block 3, the upper plane of the bottom plate 2 surrounding the periphery of the labyrinth block 3, the positioning mandrel 8 and the positioning pull rod 4, so that the labyrinth block 3 and a tool are prevented from being welded together.
Put maze piece 3 on bottom plate 2 upper plane, positioning core axle 8 is put into 3 downtheholes of maze piece, 3 up end of maze piece are arranged in to roof 1, then installation positioning pull rod 4, utilize positioning core axle 8, positioning pull rod 4 is to the hole of maze piece 3, the periphery is fixed a position, fix a position back with fastening bolt with positioning core axle 8 and roof 1 rigid coupling, it compresses tightly positioning pull rod 4 on T-shaped piece 5 to hang at stud 6 upper end with hanging nut 7, compress maze piece 3 through roof 1, make and accomplish between the maze piece and form the face contact, in order to prevent that the process of brazing part maze piece surface from not welding.
When the furnace is charged, the bottom plate 2 is contacted with the bottom of the hearth, after brazing filler metal is melted at high temperature, the height size of the labyrinth block 3 is changed, the tension force of the stud bolt 6 loses effect, and at the moment, the gravity of the top plate 1 and the positioning mandrel 8 can continuously provide pressing force for the labyrinth piece so as to prevent the labyrinth piece from being changed into point contact from surface contact after high-temperature deformation, so that the brazing gap is not uniform or the brazing filler metal is not welded.
The utility model realizes the positioning of the periphery of the inner hole of the labyrinth block 3 through the positioning mandrel 8 and the positioning pull rod 4, has convenient alignment, shortens the assembly time, improves the brazing qualification rate of the labyrinth block 3 and the grinding efficiency of the inner hole of the subsequent labyrinth block 3, and can ensure the processing size of the inner hole of the subsequent labyrinth block 3 and the flatness of the excircle; and through changing the positioning pull rod 4 and the positioning mandrel 8, the labyrinth blocks 3 with various small calibers can share one set of tool, and the cost of the brazing tool is reduced.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The utility model provides a small-bore labyrinth piece frock of brazing, has roof (1) and bottom plate (2), and the labyrinth piece (3) of waiting to braze is located between roof (1) and bottom plate (2), characterized by: bottom plate (2) go up the circumference equipartition and have positioning pull rod (4) of medial surface laminating maze piece (3) periphery, the circumference equipartition has T-shaped piece (5) that correspond with positioning pull rod (4) on roof (1), wear to be equipped with stud (6) on T-shaped piece (5), threaded connection in stud (6) lower extreme and positioning pull rod (4) upper end, stud (6) upper end is connected with and compresses tightly nut (7) on T-shaped piece (5), is located maze piece (3) hole and is equipped with upper end and roof (1) and is connected positioning core axle (8) that are used for positioning maze piece (3) hole.
2. The small-caliber labyrinth block brazing tool as set forth in claim 1, is characterized in that: four axial convex strips (9) are evenly distributed on the peripheral surface of the positioning core shaft (8) in the circumferential direction, and the outer side surfaces of the axial convex strips (9) are matched with the inner hole of the labyrinth block (3).
3. The small-caliber labyrinth block brazing tool as set forth in claim 1, wherein: four positioning pull rods (4) are connected between the top plate (1) and the bottom plate (2), and arc surfaces attached to the outer peripheral surfaces of the labyrinth blocks (3) are arranged on the inner side surfaces of the positioning pull rods (4).
4. The small-caliber labyrinth block brazing tool as set forth in claim 3, wherein: four step grooves (10) are uniformly distributed on the top plate (1) in the circumferential direction, and two ends of the horizontal section of the T-shaped block (5) are clamped on steps of the step grooves (10); four I-shaped grooves (11) are uniformly distributed on the bottom plate (2) in the circumferential direction, and the bottom end of the positioning pull rod (4) is in clamping fit with the I-shaped grooves (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221496484.XU CN217775830U (en) | 2022-06-15 | 2022-06-15 | Small-bore labyrinth piece frock of brazing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221496484.XU CN217775830U (en) | 2022-06-15 | 2022-06-15 | Small-bore labyrinth piece frock of brazing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217775830U true CN217775830U (en) | 2022-11-11 |
Family
ID=83934215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221496484.XU Active CN217775830U (en) | 2022-06-15 | 2022-06-15 | Small-bore labyrinth piece frock of brazing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217775830U (en) |
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2022
- 2022-06-15 CN CN202221496484.XU patent/CN217775830U/en active Active
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