CN209850801U - Multi-lug type butterfly valve flange expanding tool - Google Patents
Multi-lug type butterfly valve flange expanding tool Download PDFInfo
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- CN209850801U CN209850801U CN201920157781.3U CN201920157781U CN209850801U CN 209850801 U CN209850801 U CN 209850801U CN 201920157781 U CN201920157781 U CN 201920157781U CN 209850801 U CN209850801 U CN 209850801U
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- butterfly valve
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Abstract
A multi-lug type butterfly valve flange expanding tool belongs to the technical field of nuclear power station pipeline valve maintenance. The tool comprises a first fixed block, a second fixed block, a screw rod and one or two expansion nuts, wherein the first fixed block and the second fixed block are respectively clamped on two flanges of the butterfly valve; the first fixing block is provided with a unthreaded hole, and the second fixing block is provided with a screw hole; the screw rod penetrates through a unthreaded hole of the first fixed block, then penetrates through one or two expansion nuts and then penetrates through a screw hole of the second fixed block, and the first fixed block and the second fixed block are connected together; the head end of the screw rod is arranged on one side of the first fixing block. The utility model discloses can be relatively quick dismantlement and installation work of completion multi-ear formula butterfly valve. The tool has the advantages of simple structure, small weight and volume, convenient transportation, simple installation and disassembly, reliable positioning and convenient operation. Meanwhile, the risk of valve damage caused by unstable pipeline clamping is avoided, and the field work efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of nuclear power station pipeline valve overhauls, especially, relate to a many ears formula butterfly valve flange expansion instrument.
Background
When the cleanliness inspection is carried out to the inside of the pipeline at the two ends of the multi-lug butterfly valve in the circulating water pump room, the multi-lug ring connecting butterfly valve needs to be taken out for inspection, and the flange needs to be expanded in the dismounting and mounting processes so as to be convenient for taking out or loading the butterfly valve. However, in the specific operation, after the flange screws are removed and the left and right fixing hoops of the pipeline are completely loosened, the butterfly valve is still pressed by the pipeline too tightly, so that the butterfly valve cannot be taken out smoothly. Finally, the method is difficult to separate only by adopting tools such as a chain block, a hydraulic jack and the like in the working process. The method is time-consuming and labor-consuming, the chain block is difficult to fix, the working efficiency is not high, and the safety risk of instability of the hydraulic jack caused by unbalanced force exists. Considering that the number of the butterfly valves with the same type in the circulating water pump room is large, after the work is finished, a special flange expander is designed for the butterfly valve so as to be convenient to disassemble and install the butterfly valve.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that prior art exists, provide a can be easy to assemble, the multiear formula butterfly valve flange expanding tool of dismantlement, also applicable to the construction of disassembling, installing and overhauling of similar valve.
The utility model discloses a can realize through following technical scheme:
the utility model relates to a multi-lug type butterfly valve flange expanding tool, which comprises a first fixed block, a second fixed block, a screw rod and one or two expanding nuts, wherein the first fixed block and the second fixed block are respectively clamped on two flanges of a butterfly valve; the first fixing block is provided with a unthreaded hole, and the second fixing block is provided with a screw hole; the screw rod penetrates through a unthreaded hole of the first fixed block, then penetrates through one or two expansion nuts and then penetrates through a screw hole of the second fixed block, and the first fixed block and the second fixed block are connected together; the head end of the screw rod is arranged on one side of the first fixing block.
Preferably, one end of the outer periphery of the first fixing block is provided with a first extending part, and the other end of the outer periphery of the first fixing block is provided with a second extending part; the first extension part and the second extension part have a spacing distance therebetween; the first extending part is provided with a first fastener to act on the outer side surface of the flange through a top support; the second extension part acts on the inner side surface of the flange; one end of the outer peripheral side of the second fixed block is provided with a third extending part, and the other end of the outer peripheral side of the second fixed block is provided with a fourth extending part; the third extension part and the fourth extension part have a spacing distance therebetween; the third extending part is provided with a second fastener to act on the outer side surface of the flange through a top support; the fourth extension acts on the inner side face of the flange.
Preferably, the first fastening piece is assembled from the first extending part in the direction from the outer side of the flange to the outer side of the flange; the second fastening piece is assembled from the third extending part in the direction from the outer side of the flange to the outer side of the flange.
Preferably, the first fastening member is two fixing screws; the second fastener is two fixing screws.
Preferably, the area of the surface of the first extension part, which is acted on by the flange, is larger than the area of the surface of the second extension part, which is acted on by the flange; the area of the surface of the third extension part, which is acted on by the flange, is larger than that of the surface of the fourth extension part, which is acted on by the flange.
Preferably, the extension length of the first extension part is longer than that of the second extension part; the extension length of the third extension part is longer than that of the fourth extension part.
Preferably, the second extending part faces to one side of the fourth extending part of the second fixed block and is an inclined surface; the fourth extending part faces one side of the second extending part of the first fixing block and is an inclined surface.
Preferably, the inclined surface of the second extending portion is inclined from top to bottom, so that the distance between the inclined surface and the opposite side surface of the second extending portion is gradually shortened; the inclined surface of the fourth extending part inclines from top to bottom, so that the distance between the inclined surface and the opposite side surface of the fourth extending part is gradually shortened.
Preferably, the second extension part is in arc transition with two sides of a surface acting on the flange, and the fourth extension part is in arc transition with two sides of a surface acting on the flange.
Preferably, the screw thread of the screw is a fine thread.
The utility model discloses following beneficial effect has:
the utility model relates to a many ears formula butterfly valve flange expansion instrument, dismantlement and installation work of completion many ears formula butterfly valve that can be more quick. The tool has the advantages of simple structure, small weight and volume, convenient transportation, simple installation and disassembly, reliable positioning and convenient operation. Meanwhile, the risk of valve damage caused by unstable pipeline clamping is avoided, and the field work efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a multi-lug type butterfly valve flange expanding tool of the present invention;
fig. 2 is a side view of the first and second fixing blocks of fig. 1;
fig. 3 is the utility model relates to a structure assembly schematic diagram of multiear formula butterfly valve flange expansion instrument clamping on the flange.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 3, the utility model relates to a how ear formula butterfly valve flange expansion instrument includes first fixed block 1, second fixed block 2, screw rod 3, one or two expansion nuts 4. The first fixing block 1 is provided with a unthreaded hole, the second fixing block 2 is provided with a screw hole, and the screw rod 3 penetrates through the unthreaded hole of the first fixing block and the screw hole of the second fixing block 2 to connect the first fixing block 1 and the second fixing block 2. One or two expansion nuts 4 are sleeved on the screw rod 3 and positioned between the first fixing block 1 and the second fixing block 2. The screw rod 3 comprises a head end and a rod-shaped part with threads, the head end of the screw rod is arranged on one side of the first fixing block 1, and the rod-shaped part with the threads sequentially penetrates through the first fixing block 1, the expansion nut 4 and the second fixing block 2. During the use, with first fixed block 1 and second fixed block 2 clamping respectively on two flanges be used for fixed centre gripping pipeline flange, utilize the inboard neutral gear of flange between the butterfly valve two ears as the positive stress surface of expansion flange, rotate through expansion nut 4 and strut two flange faces slowly. When the operation space is enough, two expansion nuts 4 are adopted; otherwise, an expansion nut 4 is assembled and engaged with the expansion nut 4 by rotating the head end of the screw to spread the flange.
As shown in fig. 2, a first extension 11 is provided at one end of the outer circumference side of the first fixing block 1, and a second extension 12 is provided at the other end. The first extension 11 and the second extension 12 have a separation distance between them, which separation distance is present to facilitate clamping on the flange. Similarly, a third extending portion 21 is provided at one end of the outer periphery of the second fixing block 2, and a fourth extending portion 22 is provided at the other end. The third extension 21 and the fourth extension 22 have a separation distance between them, which separation distance is present to facilitate clamping on the flange. The first fixing block 1 and the second fixing block 2 can be made of carbon structural steel. One side of the second extending part 12 of the first fixing block 1, which acts on the flange, is a positive stress surface, one side of the first extending part 11 of the first fixing block 1, which acts on the flange, is a negative stress surface, and the end surface of the first fixing block 1, on which the screw 3 is assembled, is a stress surface. One side of the third extending part 21 of the second fixing block 2, which acts on the flange, is a counter-stress surface, one side of the fourth extending part 22 of the second fixing block 2, which acts on the flange, is a forehand, and the end surface of the second fixing block 2, on which the screw 3 is assembled, is a stress surface. When the acting surface continuously applies pressure, the fixed blocks on the two flanges are likely to slide upwards due to the fact that the acting surface and the stressed surface are not on the same axis. In view of the above drawbacks, the first extension 11 is equipped with a first fastening member 13 for propping against the outer side of the flange, and the second extension acts against the inner side of the flange. The third extension 21 is fitted with a second fastening member (not shown) for bracing against the outer side of the flange, and the fourth extension 22 acts against the inner side of the flange. The first fastening member 13 is fitted from the first extension 11 in a direction from the outside of the flange to the outside of the flange. Preferably, the first fastener is two set screws, such as M16 set screws. This allows the use of screws against the outer side of the flange. The second fastening member is fitted from the third extension 21 in a direction from the outside of the flange to the outside of the flange. Preferably, the second fastener is two set screws, such as M16 set screws. This allows the use of screws against the outer side of the flange. The above arrangement can effectively offset the transverse force of the upward sliding of the fixed block, and meanwhile, the fixed block can be prevented from falling off the flange when the screw rod is pulled out.
The area of the surface of the first extension part 11, which acts with the flange, is larger than that of the surface of the second extension part 12, which acts with the flange; the area of the flange-engaging surface of the third extension 21 is larger than the area of the flange-engaging surface of the fourth extension 22. Fig. 2 shows that the counter-force surface is larger than the positive force surface. The extension length of the first extension 11 is longer than that of the second extension 12, and the extension length of the third extension 21 is longer than that of the fourth extension 22. Like this, can set up the first extension 11 and the third extension 21 of the size of enough assembly fastener on the one hand, on the other hand can assist extension nut 4 shore, alleviates the pipeline to the extrusion force of butterfly valve, can laborsaving expansion flange to the dismouting butterfly valve. The area and the shape of the positive stress surface are designed according to the clear space between the outer rings of the butterfly valve seat bolt holes, and arc transition is adopted on two sides of the positive stress surface in order to increase the stress area of the positive stress surface. For example, the two sides of the surface of the second extension part 12 acting with the flange adopt circular arc transition; the fourth extension part 22 is in arc transition with two sides of the surface acting with the flange.
The second extending portion 12 faces the fourth extending portion 22 of the second fixing block 2 and is an inclined surface. The fourth extending portion 22 faces the second extending portion 12 of the first fixing block 1 and is an inclined surface. The inclined surface of the second extension portion 12 is inclined from top to bottom such that the distance between the inclined surface and the opposite side surface of the second extension portion 12 is gradually shortened. The inclined surface of the fourth extending portion 22 is inclined from top to bottom such that the distance between the inclined surface and the opposite side surface of the fourth extending portion 22 is gradually shortened. As can be seen in fig. 2, the shearing force of the first fixed block or the second fixed block ranges from the center of the acting surface to the bottom of the second extension 12 or the fourth extension 22.
The screw rod 2 adopts a hexagonal head screw rod, namely the head end is a hexagonal head end. The hexagonal head screw is processed by a No. 45 carbon rod. In consideration of the fact that the fastening force of the expansion nut 4 is large when the flange is expanded, the threads of the screw rod are fine. If the distance between the two flanges is not enough, the two expansion nuts are put in, the hexagonal head at the screw end can be used for replacing the fixing point of the wrench for expansion. The limited space of the expansion nut 4 between the outer diameter of the valve seat of the butterfly valve and the installed flange expansion tool and the rotation angle of the wrench need to be considered again under the limit of the shearing surface of the fixing block and the requirement of avoiding the stress bending of the hexagonal screw, so that the hexagonal screw adopts M30.
If fig. 3, the utility model discloses the neutral department between butterfly valve two ears is installed to two fixed blocks of expansion instrument, penetrates screw rod 3, and the spanner is screwed expansion nut 4, and two fixed blocks are opened in the 4 extrusion promotes of expansion nut, and fixed block transmission tensile force is to the pipeline flange on, promotes the flange and slowly struts the distance that needs, conveniently dismantles or installs multi-ear formula butterfly valve. Specifically, first, the second fixing block 2 with internal threads is attached to a flange, and then the two fixing screws are fastened. Next, another first fixing block 1 without an internal thread is mounted to another flange. And then, the screw rod 3 penetrates through the first fixing block 1, the expansion nut 4 is screwed into the middle position of the screw rod 3, the screw rod 3 penetrates through a screw hole with the second fixing block 2, and the fixing screw on the first fixing block 1 is fastened. And then, rotating the expansion nut 4 by using an open spanner to enable the upper surface of the expansion nut 4 to be attached to the side surface of the first fixing block 1, and applying acting force to the fixing blocks on the two sides by utilizing the stress application extrusion of the expansion nut 4 to expand the flange. The flange props the in-process, will hold up the butterfly valve all the time and notice the clearance change, prevents that the butterfly valve from dropping suddenly. The operation steps of the valve reinstallation process are the same as the method.
It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The purpose of the utility model is completely and effectively realized. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.
Claims (10)
1. A multi-lug type butterfly valve flange expanding tool is characterized by comprising a first fixing block, a second fixing block, a screw rod and one or two expanding nuts, wherein the first fixing block and the second fixing block are respectively clamped on two flanges of a butterfly valve; the first fixing block is provided with a unthreaded hole, and the second fixing block is provided with a screw hole; the screw rod penetrates through a unthreaded hole of the first fixed block, then penetrates through one or two expansion nuts and then penetrates through a screw hole of the second fixed block, and the first fixed block and the second fixed block are connected together; the head end of the screw rod is arranged on one side of the first fixing block.
2. The multi-lug type butterfly valve flange expanding tool according to claim 1, wherein a first extending part is arranged at one end of the outer peripheral side of the first fixing block, and a second extending part is arranged at the other end of the outer peripheral side of the first fixing block; the first extension part and the second extension part have a spacing distance therebetween; the first extending part is provided with a first fastener to act on the outer side surface of the flange through a top support; the second extension part acts on the inner side surface of the flange; one end of the outer peripheral side of the second fixed block is provided with a third extending part, and the other end of the outer peripheral side of the second fixed block is provided with a fourth extending part; the third extension part and the fourth extension part have a spacing distance therebetween; the third extending part is provided with a second fastener to act on the outer side surface of the flange through a top support; the fourth extension acts on the inner side face of the flange.
3. The multi-lug butterfly valve flange expansion tool of claim 2, wherein the first fastener is assembled from the first extension in a direction away from the flange outer side to proximate the flange outer side; the second fastening piece is assembled from the third extending part in the direction from the outer side of the flange to the outer side of the flange.
4. The multi-lug butterfly valve flange expansion tool of claim 3, wherein the first fastener is two set screws; the second fastener is two fixing screws.
5. The multi-lug butterfly valve flange expansion tool of claim 2, wherein the area of the first extension's flange-engaging face is greater than the area of the second extension's flange-engaging face; the area of the surface of the third extension part, which is acted on by the flange, is larger than that of the surface of the fourth extension part, which is acted on by the flange.
6. The multi-lug butterfly valve flange expansion tool of claim 2, wherein the first extension extends a length greater than the second extension; the extension length of the third extension part is longer than that of the fourth extension part.
7. The multi-lug butterfly valve flange expanding tool of claim 2, wherein the second extension is inclined facing a side of the fourth extension of the second fixed block; the fourth extending part faces one side of the second extending part of the first fixing block and is an inclined surface.
8. The multi-lug butterfly valve flange expansion tool of claim 7, wherein the inclined surface of the second extension is inclined from top to bottom such that the distance between the inclined surface and an opposite side of the second extension is gradually reduced; the inclined surface of the fourth extending part inclines from top to bottom, so that the distance between the inclined surface and the opposite side surface of the fourth extending part is gradually shortened.
9. The tool of claim 2, wherein the second extension is in arc transition with both sides of the surface on which the flange acts, and the fourth extension is in arc transition with both sides of the surface on which the flange acts.
10. The tool of claim 1, wherein the threads of the screw are fine threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157781.3U CN209850801U (en) | 2019-01-30 | 2019-01-30 | Multi-lug type butterfly valve flange expanding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157781.3U CN209850801U (en) | 2019-01-30 | 2019-01-30 | Multi-lug type butterfly valve flange expanding tool |
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| Publication Number | Publication Date |
|---|---|
| CN209850801U true CN209850801U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920157781.3U Active CN209850801U (en) | 2019-01-30 | 2019-01-30 | Multi-lug type butterfly valve flange expanding tool |
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| CN (1) | CN209850801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109571360A (en) * | 2019-01-30 | 2019-04-05 | 三门核电有限公司 | A kind of more ear formula butterfly valve flange expansion tools |
-
2019
- 2019-01-30 CN CN201920157781.3U patent/CN209850801U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109571360A (en) * | 2019-01-30 | 2019-04-05 | 三门核电有限公司 | A kind of more ear formula butterfly valve flange expansion tools |
| CN109571360B (en) * | 2019-01-30 | 2023-10-20 | 三门核电有限公司 | Multi-lug butterfly valve flange expanding tool |
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