CA1278237C - Insulation cover of steam trap - Google Patents
Insulation cover of steam trapInfo
- Publication number
- CA1278237C CA1278237C CA000488043A CA488043A CA1278237C CA 1278237 C CA1278237 C CA 1278237C CA 000488043 A CA000488043 A CA 000488043A CA 488043 A CA488043 A CA 488043A CA 1278237 C CA1278237 C CA 1278237C
- Authority
- CA
- Canada
- Prior art keywords
- covering member
- pipe connection
- connection portions
- improvement
- fusing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/161—Housings for valves, tee pieces, or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a steam trap having an outer casing and pipe connection portions extending outwardly therefrom, the trap including an outer covering member extending over the outer casing and in spaced relation thereto, the covering member mechanically abutting against the pipe connection portions, the improvement comprising: fusing the covering member to the pipe connection portions whereby to positively join the covering member to the pipe connection portions and provide a sealed air- and water-proof joint therebetween and accordingly a sealed space surrounding the steam trap.
In a steam trap having an outer casing and pipe connection portions extending outwardly therefrom, the trap including an outer covering member extending over the outer casing and in spaced relation thereto, the covering member mechanically abutting against the pipe connection portions, the improvement comprising: fusing the covering member to the pipe connection portions whereby to positively join the covering member to the pipe connection portions and provide a sealed air- and water-proof joint therebetween and accordingly a sealed space surrounding the steam trap.
Description
~7~;~3~
The present invention relates to improvements in steam traps, for example, ones which automatically discharge condensate from steam systems. It more particularly relates to the jointing construction between the casing of such traps and the outer covering member therefor, which may comprise an insulation cover. Such insulation covers have come into being with the growing tendency to energy conservation,namely to prevent the steam heat loss from steam traps due to radiation.
An example of known steam trap is disclosed in the Japanese Patent Gazette, showing Utility Model Sho 56-12480.
In this example, an outer covering member covers the entire surface of the trap casing, providing a clearance for insulation with the trap casing. In such instance, the covering member only mechanically abuts against the piping connection part of the trap casing.
A major drawback respectivé the example comprising the prior art, is that it suffers poor insulation quality.
This is due to the covering member, which may comprise various materials including ones which can be welded or braised, mechanically abutting the trap casing, resulting in a gap at the jointing~portion, i.e., intermediate the pipe connection portions thereof and the covering member. Such permits flow-in and out of air and intrusion of water into the aforementioned clearance for insulation. The flow-in and out of air and intrusion of water are expedited by expansion and contraction of air or water in the clearance for insulation space, thus causing a decreasing insulation effect due to heat dissipation.
It is therefore a prime aim of the present invention to eliminate the gap between the trap casing and the edge of the outer covering member.
~ ;~78~37 In one aspect of the present invention there is provided in a steam trap having an outer casing and pipe connection portions extending outwardly therefrom, the trap i~cluding an outer covering member extending over the outer casing and in spaced relation thereto, the covering member mechanically abutting against the pipe connection portions, the improvement comprising: fusing the covering member to the pipe connection portions whereby to positively join the covering member to the pipe connection portions and provide a sealed air and water-proof joint therebetween and accordingly a sealed space surrounding the steam trap.
For example, by welding or braising the pipe connection portions to the outer covering member, the gap between the casing and the edge of the outer covering member is completely eliminated. Flow-in and out of air nor intrusion of water no longer occurs. When sealing the gap, the sealing material is required to be heat-resistant. Sealing by welding or braising provides an ideal joint including in terms of being heat-resistant.
The inven-tion is iilustrated by way of example in the accompanying drawing wherein FIGURE 1 is a part sectional view taken through a steam trap in accordance with the present invention.
Referring to Figure 1, numeral 1 denotes the conventional steam trap, the trap having a casing 1' and pipe connections 2 and 3 extending therefrom. Numerals 4 and 5 denote respectively portions of an outer covering member A.
To facilitate assembly, outer covering member A is thus split into two segments while arranged to cover the entire outer surface of trap 1, except for the pipe connections 2 and 3.
Segments or portions 4 and 5 are fitted to trap 1 and welded together along the central periphery denoted by numeral 8 and 7~ 37 further welded to trap casing 1' at steps comprising pipe connections 2 and 3 denoted respectively by numerals 6 and 7.
A clearance space 9 is formed between the inner surface of the cover A and the outer surface of the trap casing 1'.
Clearance space 9 may be filled with insulating material such as ceramic fibre.
During operation of the steam trap in accordance with the present invention, no intrusion of water occurs into the clearance space 9, thus the insulating material therein will not deteriorate, and the initial good insulation performance remains in tact.
In the case of conventional prior art devices having merely a clearance space between the outer covering member and the trap casing, the radiation heat loss is equivalent to condensation of 0.16 Kg per hour under the conditions of 5 kg/cm2G
trap inlet steam pressure and 10 mm/hr rain fall. Using the insulated covering member according to the present invention with the same steam trap, the heat loss is reduced to 0.11 Kg/hr.
This is simply one example to illustrate the improved efficiency gained as a result of the present invention.
The present invention relates to improvements in steam traps, for example, ones which automatically discharge condensate from steam systems. It more particularly relates to the jointing construction between the casing of such traps and the outer covering member therefor, which may comprise an insulation cover. Such insulation covers have come into being with the growing tendency to energy conservation,namely to prevent the steam heat loss from steam traps due to radiation.
An example of known steam trap is disclosed in the Japanese Patent Gazette, showing Utility Model Sho 56-12480.
In this example, an outer covering member covers the entire surface of the trap casing, providing a clearance for insulation with the trap casing. In such instance, the covering member only mechanically abuts against the piping connection part of the trap casing.
A major drawback respectivé the example comprising the prior art, is that it suffers poor insulation quality.
This is due to the covering member, which may comprise various materials including ones which can be welded or braised, mechanically abutting the trap casing, resulting in a gap at the jointing~portion, i.e., intermediate the pipe connection portions thereof and the covering member. Such permits flow-in and out of air and intrusion of water into the aforementioned clearance for insulation. The flow-in and out of air and intrusion of water are expedited by expansion and contraction of air or water in the clearance for insulation space, thus causing a decreasing insulation effect due to heat dissipation.
It is therefore a prime aim of the present invention to eliminate the gap between the trap casing and the edge of the outer covering member.
~ ;~78~37 In one aspect of the present invention there is provided in a steam trap having an outer casing and pipe connection portions extending outwardly therefrom, the trap i~cluding an outer covering member extending over the outer casing and in spaced relation thereto, the covering member mechanically abutting against the pipe connection portions, the improvement comprising: fusing the covering member to the pipe connection portions whereby to positively join the covering member to the pipe connection portions and provide a sealed air and water-proof joint therebetween and accordingly a sealed space surrounding the steam trap.
For example, by welding or braising the pipe connection portions to the outer covering member, the gap between the casing and the edge of the outer covering member is completely eliminated. Flow-in and out of air nor intrusion of water no longer occurs. When sealing the gap, the sealing material is required to be heat-resistant. Sealing by welding or braising provides an ideal joint including in terms of being heat-resistant.
The inven-tion is iilustrated by way of example in the accompanying drawing wherein FIGURE 1 is a part sectional view taken through a steam trap in accordance with the present invention.
Referring to Figure 1, numeral 1 denotes the conventional steam trap, the trap having a casing 1' and pipe connections 2 and 3 extending therefrom. Numerals 4 and 5 denote respectively portions of an outer covering member A.
To facilitate assembly, outer covering member A is thus split into two segments while arranged to cover the entire outer surface of trap 1, except for the pipe connections 2 and 3.
Segments or portions 4 and 5 are fitted to trap 1 and welded together along the central periphery denoted by numeral 8 and 7~ 37 further welded to trap casing 1' at steps comprising pipe connections 2 and 3 denoted respectively by numerals 6 and 7.
A clearance space 9 is formed between the inner surface of the cover A and the outer surface of the trap casing 1'.
Clearance space 9 may be filled with insulating material such as ceramic fibre.
During operation of the steam trap in accordance with the present invention, no intrusion of water occurs into the clearance space 9, thus the insulating material therein will not deteriorate, and the initial good insulation performance remains in tact.
In the case of conventional prior art devices having merely a clearance space between the outer covering member and the trap casing, the radiation heat loss is equivalent to condensation of 0.16 Kg per hour under the conditions of 5 kg/cm2G
trap inlet steam pressure and 10 mm/hr rain fall. Using the insulated covering member according to the present invention with the same steam trap, the heat loss is reduced to 0.11 Kg/hr.
This is simply one example to illustrate the improved efficiency gained as a result of the present invention.
Claims (7)
1. In a steam trap having an outer casing and pipe connection portions extending outwardly therefrom, said trap including an outer covering member extending over said outer casing and in spaced relation thereto, said covering member mechanically abutting against said pipe connection portions, the improvement comprising: fusing said covering member to said pipe connection portions whereby to positively join said covering member to said pipe connection portions and provide a sealed air and water-proof joint therebetween and accordingly a sealed space surrounding said steam trap.
2. The improvement, as defined in claim 1, wherein said fusing of said cover member is by welding to said pipe connection portions.
3. The improvement, as defined in claim 1, wherein said fusing of said cover member is by braising said pipe connection portions.
4. The improvement, as defined in claim 1, wherein said fusing of said cover member comprises two parts which are butt-joined together by welding.
5. The improvement, as defined in claim 1, wherein said fusing of said cover member comprises two parts which are butt-joined together by braising
6. The improvement, as defined in claim 1, wherein the spacing between said outer casing and said outer covering member comprises insulating material.
7. The improvement, as defined in claim 6, wherein said insulating material comprises ceramic fibre.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984125661U JPS6140597U (en) | 1984-08-18 | 1984-08-18 | Steam trap thermal cover |
| JP59-125661 | 1984-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1278237C true CA1278237C (en) | 1990-12-27 |
Family
ID=14915524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000488043A Expired - Lifetime CA1278237C (en) | 1984-08-18 | 1985-08-02 | Insulation cover of steam trap |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS6140597U (en) |
| KR (1) | KR910000851Y1 (en) |
| AU (1) | AU580612B2 (en) |
| BR (1) | BR8503824A (en) |
| CA (1) | CA1278237C (en) |
| FR (1) | FR2569254B1 (en) |
| GB (1) | GB2163543A (en) |
| IT (1) | IT1208568B (en) |
| NL (1) | NL192540C (en) |
| ZA (1) | ZA856039B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0452921U (en) * | 1990-09-12 | 1992-05-06 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB419711A (en) * | 1933-04-13 | 1934-11-16 | Gustav Friedrich Gerdts | Improvements in steam traps |
| DE1906612A1 (en) * | 1969-02-11 | 1970-08-13 | Gestra Ksb Vertrieb Gmbh | Condensate drain |
| JPS4912212B1 (en) * | 1970-08-15 | 1974-03-23 | ||
| US4141387A (en) * | 1976-12-27 | 1979-02-27 | Suntech, Inc. | Universal steam trap insulator |
| JPS6241582Y2 (en) * | 1979-07-09 | 1987-10-24 | ||
| US4261385A (en) * | 1979-07-16 | 1981-04-14 | Exxon Research And Engineering Co. | Cylinder valve |
| US4311162A (en) * | 1980-06-23 | 1982-01-19 | Yarway Corporation | Inverted bucket steam trap |
| GB2099982A (en) * | 1981-04-24 | 1982-12-15 | Du Pont | Steam trap |
| IT1163232B (en) * | 1983-04-06 | 1987-04-08 | Jucker Spa | AUTOMATIC VALVE FOR THE DISCHARGE OF THE CONDENSATE, OF THE TYPE WITH INLETS INLETS |
-
1984
- 1984-08-18 JP JP1984125661U patent/JPS6140597U/en active Pending
-
1985
- 1985-06-13 KR KR2019850007064U patent/KR910000851Y1/en not_active IP Right Cessation
- 1985-07-12 AU AU44852/85A patent/AU580612B2/en not_active Ceased
- 1985-07-22 NL NL8502095A patent/NL192540C/en not_active IP Right Cessation
- 1985-08-02 CA CA000488043A patent/CA1278237C/en not_active Expired - Lifetime
- 1985-08-07 GB GB08519854A patent/GB2163543A/en not_active Withdrawn
- 1985-08-09 ZA ZA856039A patent/ZA856039B/en unknown
- 1985-08-13 BR BR8503824A patent/BR8503824A/en not_active IP Right Cessation
- 1985-08-14 IT IT8521934A patent/IT1208568B/en active
- 1985-08-16 FR FR8512450A patent/FR2569254B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU580612B2 (en) | 1989-01-19 |
| AU4485285A (en) | 1986-02-20 |
| IT1208568B (en) | 1989-07-10 |
| JPS6140597U (en) | 1986-03-14 |
| BR8503824A (en) | 1986-05-20 |
| FR2569254B1 (en) | 1988-12-02 |
| GB8519854D0 (en) | 1985-09-11 |
| KR910000851Y1 (en) | 1991-02-08 |
| IT8521934A0 (en) | 1985-08-14 |
| NL192540C (en) | 1997-09-02 |
| NL8502095A (en) | 1986-03-17 |
| ZA856039B (en) | 1986-03-26 |
| KR860002373U (en) | 1986-03-31 |
| FR2569254A1 (en) | 1986-02-21 |
| GB2163543A (en) | 1986-02-26 |
| NL192540B (en) | 1997-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |