CN101992247A - O-shaped ring sealing hydraulic expanding rod device - Google Patents
O-shaped ring sealing hydraulic expanding rod device Download PDFInfo
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- CN101992247A CN101992247A CN2009100566070A CN200910056607A CN101992247A CN 101992247 A CN101992247 A CN 101992247A CN 2009100566070 A CN2009100566070 A CN 2009100566070A CN 200910056607 A CN200910056607 A CN 200910056607A CN 101992247 A CN101992247 A CN 101992247A
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- expander roll
- hydraulic pressure
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- runddichtringo
- taper
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Abstract
The invention relates to an O-shaped ring sealing hydraulic expanding rod device. The device comprises an expanding rod and a sealing assembly, wherein the expanding rod is provided with a central hole, the top of the central hole is provided with a radial hole penetrating the expanding rod and communicated with the central hole, and two sides of the radial hole are provided with annular grooves; and the sealing assembly consists of O-shaped sealing rings and wedge-shaped baffle ring pairs, and the sealing assembly is arranged in the annular grooves. Compared with the prior art, the device has the advantages of simple structure, reliable sealing, low using cost, good adaptability to the inside diameter deviation of a pipe and the like.
Description
Technical field
The present invention relates to a kind of device of heat exchanger production technical field, especially relate to the sealed hydraulic pressure expander roll of a kind of O type circle device.
Background technology
At present in heat exchanger is produced, the expanded joint of pipe and tube sheet mainly adopts mechanical expanded joint and two kinds of expanded joint modes of Hydraulic expansion-jointing, hydraulic expanding tube has expanded joint efficient height, pipe is not produced mechanical damage, the expand tube degree of depth reaches the location greatly accurately, hydraulic expanding tube pressure can accurately be set and resetting, and the expand tube quality advantage such as can be fully guaranteed and extensively adopt in the process of large-scale, high-end heat exchanger.Expander roll and hermetically-sealed construction thereof are the key components in the Hydraulic expansion-jointing.In hydraulic expanding tube, become the main at present Hydraulic expansion-jointing mode that adopts because that liquid pocket type expanded joint has is strong to the adaptability of pipe sizing deviation, be convenient to use this outstanding feature.But the major defect of liquid pocket type expanded joint is that liquid bag expense height and life-span are low, and a liquid bag generally can only use 50 times to 80 times, so liquid pocket type expanded joint expense is higher and produce a large amount of liquid bag rubbish.And expanded joint that expanded joint length big little for caliber makes too elongated being easy to of expander roll crookedly influence expanded joint and greatly reduce the expander roll life-span because the bag that expands has certain thickness.In addition because liquid bag tension force, can produce mid diameter behind the expanded joint during expanded joint greater than the reducing phenomenon of two ends diameter.And seal with O ring formula expander roll since its to the adaptability of ips deviation far away from the liquid bag, less application during heat exchanger is produced at home.
Through retrieval, related to the present invention in the prior art have only a utility model patent, " expander roll device ", patent No. ZL200820085446.9, this utility model patent and expanded joint pipe that wall thickness bigger less for internal diameter will be subjected to the restriction of its structure, for neither be very good by the adaptability of expand tube internal diameter deviation, the structure relative complex of this expander roll device simultaneously.
Summary of the invention
Purpose of the present invention is exactly that a kind of compact conformation, sealing is reliable, use cost is low, good to ips deviation adaptability the sealed hydraulic pressure expander roll of O type circle device are provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions: the sealed hydraulic pressure expander roll of a kind of O type circle device, it is characterized in that, this device comprises expander roll and black box, described expander roll is provided with centre bore, be provided with at the centre bore top run through expander roll and and the radial hole that communicates of centre bore, these radial hole both sides are provided with the hoop groove, and to forming, black box is arranged in the hoop groove described black box by O RunddichtringO and wedge shape baffle ring.
The front end of described expander roll is taper or dome-type head, and the expander roll rear end is provided with the screw thread that is connected with the expand tube rifle.
The diameter of described radial hole is 0.5-1 a times of center-hole diameter.
0.75 times of the diameter preferred center bore dia of described radial hole.
Described hoop groove end face adopts bigger fillet or conical surface transition.
O RunddichtringO in the described hoop groove is provided with 1 or 2, and the wedge shape baffle ring is to being provided with 1 or 2.
When described O RunddichtringO was provided with 2, the cross dimensions of the O RunddichtringO of close hydraulic pressure side was more than or equal to the cross dimensions of outside O RunddichtringO, and the hardness of the O RunddichtringO of hydraulic pressure side is smaller or equal to the hardness of outside O RunddichtringO.
Described wedge shape baffle ring is to being made up of a recessed taper-face ring and a protruding taper-face ring.
Described recessed taper-face ring or protruding taper-face ring connect to form recessed taper-face ring or the protruding taper-face ring that can radially install and remove by one 3/4ths ring and one 1/4th ring, and 3/4ths rings of this recessed taper-face ring or protruding taper-face ring are S shape with the connecting portion of 1/4th rings.
Compared with prior art, apparatus of the present invention are simple in structure, 0.5-1 the radial hole of centre bore size doubly and thicker relatively bar footpath, and hoop groove end face adopts bigger fillet or conical surface transition, make the fatigue problem of tapping be eased, the right design of wedge shape baffle ring makes baffle ring have certain radial clearance compensation ability and can change baffle ring easily, and can adapt to the pipe expanded joint of bigger internal diameter deviation.
Description of drawings
Fig. 1 is the half sectional view of apparatus of the present invention;
Fig. 2 is Figure 1A portion enlarged drawing;
Fig. 3 is the present invention's dismounting back-up ring structure axial view radially;
Fig. 4 is the recessed taper-face ring cutaway view of the present invention;
Fig. 5 is the protruding taper-face ring cutaway view of the present invention;
Fig. 6 is the schematic diagram of apparatus of the present invention and pipe assembling;
Fig. 7 is the B portion enlarged drawing of Fig. 6;
Fig. 8 is the partial enlarged drawing of hoop groove 4.
The specific embodiment
The invention will be further described for the contrast drawings and the specific embodiments below.Present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Shown in Fig. 1-7, the sealed hydraulic pressure expander roll of a kind of O type circle device, comprise expander roll 1 and black box, described expander roll 1 is provided with centre bore 2, be provided with at centre bore 2 tops run through expander roll 1 and and the radial hole 3 that communicates of centre bore 2, the diameter of radial hole 3 is 0.75 times of center-hole diameter, radial hole 3 both sides are provided with hoop groove 4, front end at expander roll 1 is a conical head 5, the rear end of expander roll 1 is provided with the screw thread 6 that is connected with the expand tube rifle, be provided with round missing link 7 in the front portion of connecting thread 6, described black box is arranged in the hoop groove 4.
Described black box is made up of 10 two O RunddichtringOs (O RunddichtringO 8, O RunddichtringO 9) and two pairs of wedge shape baffle rings, O RunddichtringO 8, and O RunddichtringO 9 and wedge shape baffle ring are to 10 spaces.O RunddichtringO 8 is different with the hardness and the cross dimensions of O RunddichtringO 9, the hardness of the O RunddichtringO 8 of close radial hole 2 hydraulic pressure sides (inboard) is less than or equal to the hardness of the outside away from the O RunddichtringO 9 of radial hole, the cross dimensions of the O RunddichtringO 8 of hydraulic pressure side (inboard) is more than or equal to the cross dimensions of the outside away from the O RunddichtringO 9 of radial hole, described wedge shape baffle ring is formed (shown in Fig. 2-5) to 10 by a recessed taper-face ring 11 and convex cone face 12 rings, recessed taper-face ring 11 and protruding taper-face ring 12 are made up of 13 and one 1/4th rings 14 of one 3/4ths ring can radially install and remove concave cone face ring 11 and protruding taper-face ring 12, between described 3/4ths rings, 13 and 1/4th rings 14 is S shape seam 15 (as shown in Figure 3), and hoop groove end face adopts bigger fillet 18 or the conical surface 19 transition (as shown in Figure 8).
The number of assembling steps of the sealed hydraulic pressure expander roll of O type circle of the present invention device is as follows:
(1) O RunddichtringO 8 and O RunddichtringO 9 are inserted the hoop groove 4 from expander roll 1 end, recessed taper-face ring 11 and a protruding taper-face ring 12 are installed in hoop groove 4 relevant positions in groups;
(2) expander roll 1 and expand tube rifle are linked to each other after the back inserts in the pipe 16 in tube sheet 17 holes by screw thread 6, apply hydraulic pressure, distortion along with O RunddichtringO 8 and O RunddichtringO 9 and pipe 16, the wedge shape baffle ring to 10 to endwisely slipping and producing radial dilatation, this expansion just in time the wedge shape baffle ring to 10 and the gap of pipe 16 fill out and make that O RunddichtringO 8 and O RunddichtringO 9 are not extruded under the high pressure, thereby realize the purpose of expanded joint.Because right radial compensation and the resilience after the release of wedge shape baffle ring makes the present invention can adapt to the pipe expanded joint of bigger internal diameter deviation.As shown in Figure 6, top is the distortion schematic diagram of pipe and black box under the expanded joint pressure, and the bottom is the distortion schematic diagram of pipe before expanding and black box.Fig. 7 is the B portion enlarged drawing of Fig. 6.
Embodiment 2
The sealed hydraulic pressure expander roll of a kind of O type circle device, this device comprises expander roll and black box, described expander roll is provided with centre bore, be provided with at the centre bore top run through expander roll and and the radial hole that communicates of centre bore, the diameter of radial hole is 0.5 times of center-hole diameter, make the fatigue problem of tapping be eased, the radial hole both sides are provided with the hoop groove, the front end of described expander roll is the dome-type head, the expander roll rear end is provided with the screw thread that is connected with the expand tube rifle, described black box is arranged in the hoop groove, black box by 1 O RunddichtringO and 1 pair of wedge shape baffle ring to forming, described wedge shape baffle ring is to being made up of a recessed taper-face ring and a protruding taper-face ring, described recessed taper-face ring or protruding taper-face ring connect to form recessed taper-face ring or the protruding taper-face ring that can radially install and remove by one 3/4ths ring and one 1/4th ring, 3/4ths rings of this recessed taper-face ring or protruding taper-face ring are S shape with the connecting portion of 1/4th rings, make baffle ring have certain radial clearance compensation ability and also can change baffle ring easily, and can adapt to the pipe expanded joint of bigger internal diameter deviation.
O type circle is inserted the seal groove from the expander roll end, a recessed taper-face ring and a protruding taper-face ring are installed in the seal groove relevant position in groups.Expander roll is linked to each other with bloated rifle after the back inserts in the pipe in the tubesheet holes, apply hydraulic pressure, along with the distortion of O type circle and pipe, concave surface wedge shape back-up ring is to endwisely slipping and produce radial dilatation, and this expansion is just in time filled out the gap of back-up ring and pipe and made that O type circle is not extruded under the high pressure.
Embodiment 3
The sealed hydraulic pressure expander roll of a kind of O type circle device, this device comprises expander roll and black box, described expander roll is provided with centre bore, be provided with at the centre bore top run through expander roll and and the radial hole that communicates of centre bore, the diameter of radial hole is 1 times of center-hole diameter, make the fatigue problem of tapping be eased, the radial hole both sides are provided with the hoop groove, the front end of described expander roll is the dome-type head, the expander roll rear end is provided with the screw thread that is connected with the expand tube rifle, described black box is arranged in the hoop groove, black box by 2 O RunddichtringOs and 2 pairs of wedge shape baffle rings to forming, O RunddichtringO and wedge shape baffle ring are to the space, the hardness of two O RunddichtringOs is different with cross dimensions, the O RunddichtringO hardness of close radial hole is smaller or equal to the O RunddichtringO away from radial hole, and cross dimensions is more than or equal to the O RunddichtringO away from radial hole, and described wedge shape baffle ring is to being made up of a recessed taper-face ring and a protruding taper-face ring.Described recessed taper-face ring or protruding taper-face ring connect to form recessed taper-face ring or the protruding taper-face ring that can radially install and remove by one 3/4ths ring and one 1/4th ring, 3/4ths rings of this recessed taper-face ring or protruding taper-face ring are S shape with the connecting portion of 1/4th rings, make baffle ring have certain radial clearance compensation ability and also can change baffle ring easily, and can adapt to the pipe expanded joint of bigger internal diameter deviation.
O type circle is inserted the seal groove from the expander roll end, recessed taper-face ring and a protruding taper-face ring are installed in the seal groove relevant position in groups.Expander roll is linked to each other with bloated rifle after the back inserts in the pipe in the tubesheet holes, apply hydraulic pressure, along with the distortion of O type circle and pipe, concave surface wedge shape back-up ring is to endwisely slipping and produce radial dilatation, and this expansion is just in time filled out the gap of back-up ring and pipe and made that O type circle is not extruded under the high pressure.
Claims (9)
1. the sealed hydraulic pressure expander roll of O type circle device, it is characterized in that, this device comprises expander roll and black box, described expander roll is provided with centre bore, be provided with at the centre bore top run through expander roll and and the radial hole that communicates of centre bore, these radial hole both sides are provided with the hoop groove, and to forming, black box is arranged in the hoop groove described black box by O RunddichtringO and wedge shape baffle ring.
2. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 1 device is characterized in that the front end of described expander roll is taper or dome-type head, and the expander roll rear end is provided with the screw thread that is connected with the expand tube rifle.
3. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 1 device is characterized in that, the diameter of described radial hole is 0.5-1 a times of center-hole diameter.
4. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 3 device is characterized in that, 0.75 times of the diameter preferred center bore dia of described radial hole.
5. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 1 device is characterized in that, described hoop groove end face adopts fillet or conical surface transition.
6. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 1 device is characterized in that, the O RunddichtringO in the described hoop groove is provided with 1 or 2, and the wedge shape baffle ring is to being provided with 1 or 2.
7. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 5 device, it is characterized in that, when described O RunddichtringO is provided with 2, the cross dimensions of the O RunddichtringO of close hydraulic pressure side is more than or equal to the cross dimensions of outside O RunddichtringO, and the hardness of the O RunddichtringO of hydraulic pressure side is smaller or equal to the hardness of outside O RunddichtringO.
8. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 5 device is characterized in that described wedge shape baffle ring is to being made up of a recessed taper-face ring and a protruding taper-face ring.
9. the sealed hydraulic pressure expander roll of a kind of O type circle according to claim 7 device, it is characterized in that, described recessed taper-face ring or protruding taper-face ring connect to form recessed taper-face ring or the protruding taper-face ring that can radially install and remove by one 3/4ths ring and one 1/4th ring, and 3/4ths rings of this recessed taper-face ring or protruding taper-face ring are S shape with the connecting portion of 1/4th rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100566070A CN101992247A (en) | 2009-08-18 | 2009-08-18 | O-shaped ring sealing hydraulic expanding rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100566070A CN101992247A (en) | 2009-08-18 | 2009-08-18 | O-shaped ring sealing hydraulic expanding rod device |
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| Publication Number | Publication Date |
|---|---|
| CN101992247A true CN101992247A (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100566070A Pending CN101992247A (en) | 2009-08-18 | 2009-08-18 | O-shaped ring sealing hydraulic expanding rod device |
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| CN (1) | CN101992247A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203420A (en) * | 2013-04-25 | 2013-07-17 | 东方电气集团东方锅炉股份有限公司 | Expanding connection method between heat exchange pipe and pipe plate and between heat exchange pipe and anti-scouring sleeve |
| CN114673729A (en) * | 2022-01-30 | 2022-06-28 | 山东省章丘鼓风机股份有限公司 | Combined labyrinth seal structure for bearing seat |
-
2009
- 2009-08-18 CN CN2009100566070A patent/CN101992247A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203420A (en) * | 2013-04-25 | 2013-07-17 | 东方电气集团东方锅炉股份有限公司 | Expanding connection method between heat exchange pipe and pipe plate and between heat exchange pipe and anti-scouring sleeve |
| CN103203420B (en) * | 2013-04-25 | 2014-12-03 | 东方电气集团东方锅炉股份有限公司 | Expanding connection method between heat exchange pipe and pipe plate and between heat exchange pipe and anti-scouring sleeve |
| CN114673729A (en) * | 2022-01-30 | 2022-06-28 | 山东省章丘鼓风机股份有限公司 | Combined labyrinth seal structure for bearing seat |
| CN114673729B (en) * | 2022-01-30 | 2023-11-24 | 山东省章丘鼓风机股份有限公司 | Combined labyrinth sealing structure for bearing pedestal |
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Application publication date: 20110330 |