CN204903095U - Float head heat -exchanger is water pressure sealing device for shell side - Google Patents
Float head heat -exchanger is water pressure sealing device for shell side Download PDFInfo
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- CN204903095U CN204903095U CN201520646048.XU CN201520646048U CN204903095U CN 204903095 U CN204903095 U CN 204903095U CN 201520646048 U CN201520646048 U CN 201520646048U CN 204903095 U CN204903095 U CN 204903095U
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Abstract
The utility model provides a float head heat -exchanger is water pressure sealing device for shell side comprises sealing sleeve and sealing washer. Wherein: sealing sleeve's internal diameter be greater than cooperate the external diameter of the floating tubesheet that uses, this sealing sleeve's external diameter covers the flange that inclines with unsteady the outside of float head heat -exchanger shell and equals. Have the flange at the outer peripheral surface of sealing sleeve one end, the internal surface of the other end is equipped with the sealing washer. Sealing sleeve's circumference has the water injection hole of lining up with the tank bottom on the surface. The utility model has the characteristics of simple structure, low in manufacturing cost, the processing degree of difficulty is little, and the leakproofness is good, economical and practical, the water pressure in -process with the only rubber packing ring of floating tubesheet contact, has reduced the surface injury to the floating tubesheet.
Description
Technical field
The present invention relates to chemical machinery industry, specifically a kind of hydraulic sealing device of movable tube sheets heat exchanger shell side.
Background technology
Movable tube sheets heat exchanger is as the large class of one in heat interchanger, be widely adopted in the device such as oil, chemical industry, because its design feature determined, to the inspection of its heat exchanger tube and floating tubesheet fillet weld, must by means of special structure for pressure test, this has clear and definite regulation in GB151 " steel tube shell type heat interchanger ", but does not then provide for the concrete form of frock.TEMA " shell-and-tube heat exchanger AEM of the U.S. " is though give the version of frock in standard, but find to still have some inconveniences through long-term use, the restriction as high in frock making cost, recycling rate of waterused is low, interchangeability that is frock is poor, hermetically-sealed construction is subject to nominal diameter and pressure rating.Therefore this structure is mainly suitable for the manufacturer of sizing and heat interchanger in enormous quantities, and little for batch, the obvious financial cost of the enterprise that specification is many is unallowed.
At present, most domestic use TEMA standard recommendation belong to stuffing seal.Packing seal belongs to forced seal, exists following not enough:
The outer skull side flange of heat interchanger is connected by casing bolts with structure for pressure test, uses rubber cotton plate as seal element between 2.Seal element between floating tubesheet hoop and structure for pressure test is packing 7, and packing compression deformation is reached sealing purpose by the bolt pretightening on gland.There are 6 problems in structure for pressure test.
(1), frock poor universality.But heat interchanger that nominal pressure different identical for nominal diameter, quantity, the diameter of its outer skull side flange bolt hole are different, and therefore the structure for pressure test of same diameter can not be suitable for the heat interchanger of all nominal pressures.Although hole can be cut to match with shell flange in frock by Methods of OFC-A, this not only lowers the intensity of structure for pressure test, also easily make structure for pressure test be out of shape and cause sealing property to decline.
(2), sealing is poor.The manufacturer's standard adopted due to movable tube sheets heat exchanger manufacturing firm is different or owing to upgrading the reasons such as heat exchanger tube, and tube sheet stretches out the length of shell flange also can be different, and for this reason, filler accurately can not be pressed on tubesheet location and cause seal failure.
(3), bolt pretightening needed for packing seal is very large, but the elasticity of rubber asbestos plate pad and degree of compressibility limited, therefore, there is contradiction in larger bolt pretightening and limited compression stroke, can affect sealing effectiveness to a certain extent.
(4), the joint of filler and compacting need higher erection skill, if filler is installed incorrect, also easily to leak at this.
(5), packing 7 and rubber asbestos plate pad 5 generally can only single use, and cost is higher.
(6), heat interchanger is when overhauling on a large scale, and the structure for pressure test of many specifications is unfavorable for construction and the management of Overhaul site.
Summary of the invention
In order to overcome, the sealing existed in prior art is poor, cost is higher, and the deficiency that operation requirements is high, the present invention proposes a kind of movable tube sheets heat exchanger shell side hydraulic sealing device.
The present invention includes seal sleeve and O-ring seal.Wherein: the internal diameter 1 ~ 2mm larger than the external diameter of the floating tubesheet of use joined together of described seal sleeve; The external diameter of sealing sleeve is equal with the outer skull side flange that floats of movable tube sheets heat exchanger shell.Have the radial flange protruded at the external peripheral surface of described seal sleeve one end, have the seal groove of annular at the inside surface of the described seal sleeve other end, O-ring seal is assemblied in lid seal groove.The circumferential surface of described seal sleeve there is the water injection hole that through with described seal groove bottom land.
The size of seal contact face of described seal sleeve is consistent with the size of seal contact face of floating head side flange; Internal diameter size 1 ~ 2mm larger than floating tubesheet; Seal sleeve height is greater than tube bank and stretches out outer skull side flange length 1 ~ 2mm.
The internal circular surfaces of described O-ring seal has radial V-shaped groove.Seal groove fit-up gap on O-ring seal and seal sleeve is within 0.5mm.
When using of the present invention, first O-ring seal is loaded in the dovetail groove of seal sleeve, seal sleeve is connected with outer skull side flange bolt, utilize general common material pad to realize sealing, require seal sleeve and floating tubesheet isoplanar, gap 1 ~ 2mm, hydraulic pamp is connected with seal sleeve, make the O-ring seal in dovetail groove produce distortion by beating back pressure to seal sleeve, laminating floating tubesheet outer wall, reaches sealing effectiveness.
The present invention adopts the design of sealing dovetail groove, the basis beating back pressure realizes sealing, have the following advantages to frock:
(1), structure is simple, and low cost of manufacture, difficulty of processing is little.
(2), good airproof performance, as long as the dovetail groove on seal sleeve is within the scope of floating tubesheet outer wall, can effective sealing be realized.
(3), packing washer can Reusability, and financial cost is lower.
(4), tool structure is simple, simple to operate, convenient management.
(5), in Hydraulic Process, what contact with floating tubesheet only has rubber washer, decreases the superficial injury to floating tubesheet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of seal sleeve;
Fig. 3 is the structural representation of O-ring seal, and wherein, 3a is front view, and 3b is the A-A direction view in 3a;
Fig. 4 is the schematic diagram of the hydraulic testing.
Fig. 5 is the test schematic diagram adopting prior art.In figure:
1. seal sleeve; 2. O-ring seal; 3. floating tubesheet; 4. heat exchanger tube; 5. it-plate; 6. outer skull side flange; 7. packing.
Specific embodiment
The present embodiment is DN600PN6.4 movable tube sheets heat exchanger shell side hydraulic sealing device, comprises seal sleeve 1 and O-ring seal 2.
Described seal sleeve 1 is sleeve-shaped, adopts steel to make.Internal diameter 1 ~ the 2mm larger than the external diameter of the floating tubesheet of use joined together of sealing sleeve; The external diameter of sealing sleeve is equal with the outer skull side flange that floats of movable tube sheets heat exchanger shell.There is the radial flange protruded at the external peripheral surface of described seal sleeve 1 one end, this flange is evenly equipped with bolt hole, should be connected with floating head side flange by bolt.The axial height of described flange is equal with the flange thickness of floating head side flange, to ensure that the deformation and failure because intensity deficiency causes can not occur seal sleeve in process of the test.Ring groove is had, for laying O-ring seal 2 at the inside surface of described seal sleeve 1 other end.There is a through hole sealing groove side, from water filling in this hole when beating back pressure, and is connected with the hydraulic pamp beating back pressure herein.Described clear size of opening and hydraulic pamp pipeline match.
The reference circle of the reference circle size of described seal sleeve flange upper bolt hole and the outer skull side flange of heat interchanger is measure-alike, the sealing surface form of flange and size coordinate with outer skull side flange, adopt the sealing surface form matched with floating head side flange to seal.The size of seal contact face of seal sleeve is consistent with the size of seal contact face of floating head side flange; Internal diameter size 1 ~ 2mm larger than floating tubesheet; Seal sleeve height is greater than tube bank and stretches out outer skull side flange length 1 ~ 2mm.Seal sleeve 1 makes 1 altogether.Described sealing surface form is the shape of sealing surface, is commonly referred to sealing surface form in this area.
O-ring seal 2 adopts fluororubber to make, with the ring groove on seal sleeve with the use of.The internal circular surfaces of described O-ring seal 2 has radial V-shaped groove.O-ring seal can withstand voltage 10Mpa, with the seal groove fit-up gap on seal sleeve within 0.5mm.O-ring seal is assemblied in seal sleeve seal groove.
In this embodiment, to carry out DN600PN6.4 floating head heat exchanger shell side hydraulic pressure.As shown in Figure 4, during use, first O-ring seal 2 is loaded in the dovetail groove of seal sleeve 1, seal sleeve is connected with bolt with outer skull side flange 6, adopt it-plate 5 to make pad to seal, ensure seal sleeve 1 and floating tubesheet 3 isoplanar, gap 1 ~ 2mm, hydraulic pamp is connected with seal sleeve, connect dovetail groove part to seal sleeve and beat back pressure, back-pressure is 1.5Mpa, and viton gasket produces distortion, be fitted in floating tubesheet outer wall, reach sealing effectiveness.
Conveniently hydraulic pressure technique, is connected heat interchanger with hydraulic equipment, setting pressure table, and test pressure carries out the hydraulic testing by drawing.
The present embodiment efficiently solves factory, and to raise the nose above water to breathe heat exchanger tube shell side hydro-test frock making complicated, and at the bottom of recycling rate of waterused, financial cost is high, inefficient problem, has easy processing, easily assembling, cost is low and efficiency is high feature.
Claims (3)
1. a movable tube sheets heat exchanger shell side hydraulic sealing device, is characterized in that, comprises seal sleeve and O-ring seal; Wherein: the internal diameter 1 ~ 2mm larger than the external diameter of the floating tubesheet of use joined together of described seal sleeve; The external diameter of sealing sleeve is equal with the outer skull side flange that floats of movable tube sheets heat exchanger shell; Have the radial flange protruded at the external peripheral surface of described seal sleeve one end, have the seal groove of annular at the inside surface of the described seal sleeve other end, O-ring seal is assemblied in lid seal groove; The circumferential surface of described seal sleeve there is the water injection hole that through with described seal groove bottom land.
2. movable tube sheets heat exchanger shell side hydraulic sealing device as claimed in claim 1, it is characterized in that, the size of seal contact face of described seal sleeve is consistent with the size of seal contact face of floating head side flange; Internal diameter size 1 ~ 2mm larger than floating tubesheet; Seal sleeve height is greater than tube bank and stretches out outer skull side flange length 1 ~ 2mm.
3. movable tube sheets heat exchanger shell side hydraulic sealing device as claimed in claim 1, is characterized in that, the internal circular surfaces of described O-ring seal has radial V-shaped groove; Seal groove fit-up gap on O-ring seal and seal sleeve is within 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646048.XU CN204903095U (en) | 2015-08-25 | 2015-08-25 | Float head heat -exchanger is water pressure sealing device for shell side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520646048.XU CN204903095U (en) | 2015-08-25 | 2015-08-25 | Float head heat -exchanger is water pressure sealing device for shell side |
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| CN204903095U true CN204903095U (en) | 2015-12-23 |
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| CN201520646048.XU Active CN204903095U (en) | 2015-08-25 | 2015-08-25 | Float head heat -exchanger is water pressure sealing device for shell side |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441725A (en) * | 2016-10-11 | 2017-02-22 | 北京航空航天大学 | Assembling device for high-pressure air tightness detection of tiny-diameter thin-walled tube square heat exchanger |
| CN108169026A (en) * | 2017-11-29 | 2018-06-15 | 西安航天动力机械有限公司 | A kind of inspection tooling for high-pressure bottle hydraulic test |
| CN110000618A (en) * | 2017-12-29 | 2019-07-12 | 三门核电有限公司 | Spool has the regulating valve fix tool and restorative procedure of C-shaped ring auxiliary seal |
-
2015
- 2015-08-25 CN CN201520646048.XU patent/CN204903095U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441725A (en) * | 2016-10-11 | 2017-02-22 | 北京航空航天大学 | Assembling device for high-pressure air tightness detection of tiny-diameter thin-walled tube square heat exchanger |
| CN108169026A (en) * | 2017-11-29 | 2018-06-15 | 西安航天动力机械有限公司 | A kind of inspection tooling for high-pressure bottle hydraulic test |
| CN110000618A (en) * | 2017-12-29 | 2019-07-12 | 三门核电有限公司 | Spool has the regulating valve fix tool and restorative procedure of C-shaped ring auxiliary seal |
| CN110000618B (en) * | 2017-12-29 | 2024-02-09 | 三门核电有限公司 | Valve core-provided C-shaped ring auxiliary sealing adjusting valve repairing tool and repairing method |
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