CA1158119A - Portable heater (heat hoser) - Google Patents
Portable heater (heat hoser)Info
- Publication number
- CA1158119A CA1158119A CA000402499A CA402499A CA1158119A CA 1158119 A CA1158119 A CA 1158119A CA 000402499 A CA000402499 A CA 000402499A CA 402499 A CA402499 A CA 402499A CA 1158119 A CA1158119 A CA 1158119A
- Authority
- CA
- Canada
- Prior art keywords
- heat
- elements
- enclosures
- portable construction
- heaters
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/06—Portable or mobile, e.g. collapsible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/08—Packaged or self-contained boilers, i.e. water heaters with control devices and pump in a single unit
Abstract
PORTABLE CONSTRUCTION HEATING SYSTEM:
ABSTRACT.
A portable construction heating system is described in which flexible heat elements are placed in close proximity to objects of various shapes and configurations which would otherwise be difficult to heat. The heating elements are comprised of flexible hoses which contain a circulating preheated liquid.
The primary object of this invention is to provide an improved method of applying heat to fresh concrete which has been placed in pre-constructed formwork during extreme cold weather. The advantage is that heat can be applied to virtually any shape of formwork including structural beams, walls, vertical columns and slabs, and together with the application of a tight fitting insulating cover provides an economical means of preventing damage due to freezing during the curing process.
Conventional heating methods utilize direct fired forced air heaters which are placed inside of temporarily constructed hoardings or enclosures. Due to the nature of open flame heaters the enclosures must be large and therefore are costly to construct and uneconomical to heat. The temporarily constructed enclosures offer little resistance to wind damage, and are obviously a fire hazard. The heat is generally too great at the source and too little at the far end of the enclosure.
Conventional heaters produce carbon monoxide fumes which attack the concrete curing process rendering this equipment undesirable without heat exchange fitments added.
ABSTRACT.
A portable construction heating system is described in which flexible heat elements are placed in close proximity to objects of various shapes and configurations which would otherwise be difficult to heat. The heating elements are comprised of flexible hoses which contain a circulating preheated liquid.
The primary object of this invention is to provide an improved method of applying heat to fresh concrete which has been placed in pre-constructed formwork during extreme cold weather. The advantage is that heat can be applied to virtually any shape of formwork including structural beams, walls, vertical columns and slabs, and together with the application of a tight fitting insulating cover provides an economical means of preventing damage due to freezing during the curing process.
Conventional heating methods utilize direct fired forced air heaters which are placed inside of temporarily constructed hoardings or enclosures. Due to the nature of open flame heaters the enclosures must be large and therefore are costly to construct and uneconomical to heat. The temporarily constructed enclosures offer little resistance to wind damage, and are obviously a fire hazard. The heat is generally too great at the source and too little at the far end of the enclosure.
Conventional heaters produce carbon monoxide fumes which attack the concrete curing process rendering this equipment undesirable without heat exchange fitments added.
Description
SPECIFICATION.
The portable heating system is comprised of two circuits of circulatinP
heated liquid. The liquid consisting of a water/glycol so ution mixed in a ratio suitable to prevent freezing. The heat generator (1) is fired by liquid propane or alternate fuels, ignited by an electrical element, and controlled by means of a thermostat (13) to produce desired liquid temperatures. The heated liquid is circulated by means of a pump (2) though supply conduit (3), through the heat exchange coil (4), and returned through conduit (5), to the expansion tank (6) and back to the heat generator (1). The source of heat to the secondary circuit is the heat exchanger coil (4) which transfers heat to a heat exchange reservoir (7), the liquid is circulated by the secondary pump (8) to the distribution manifold (9), through the line valves (10) to the flexible heat elements (11) which transfer the heat to the subject. The cooled liquid returns to the secondary expansion tank (12) and completes the circuit to the heat exchange reservoir (7). Liquid levels vary constantly during actual field operations as elements are added to, or removed from, the system and therefore it is necessary that the secondary supply of heated liquid is circulated independant of the primary circuit.
, ~ .
.. _ . ._ ........ _.. .
, . _ . .. _ _.. _ . . .. _ i.3 ~ . .
.
115811g In the interest of safety to the operator, the system operates on relative low temperatures (the average temperature of the heat elements being 43 C.) and at relative low water pressures (the secondary pump designed to develop approximately 5 lbs.PSI pressure in each of the heat elements). A temperature guage (14) and a pressure guage (15) are provided in order that the operator can monitor the system. A bypass valve (16) is provided in order that the system may be run prior to the connecting of the flexible heat elements.
Figure #1 - schematic drawing of portable heating system, Figure #2 and #3 - indicate typical applications of the process.
In the case of heating concrete the process is as follows:
a) The heat elements are placed in the best possible proximity to the mass which is to be heated.
b) The entire formwork is enclosed with an insulated cover.
c) The formwork is preheated prior to the placement of concrete.
d) The insulated cover is removed, the concrete placed and the cover re-applied.
e) Heat is maintained for the necessary length of time.
f) The insulated cover and the heat elements removed and made ready for re-use.
The system is suitable for applying heat to other subjects and is not necessarily confined to use in relation to concrete placement. Other typical uses are: heating water barrels, liquid propane storage tanks, thawing frozen ground, etc. Although this system has been shown and described with respect to a preferred embodiment, it should be understood that changes in form and detail may be made without departing from the spirit and scope of the invention.
I
The portable heating system is comprised of two circuits of circulatinP
heated liquid. The liquid consisting of a water/glycol so ution mixed in a ratio suitable to prevent freezing. The heat generator (1) is fired by liquid propane or alternate fuels, ignited by an electrical element, and controlled by means of a thermostat (13) to produce desired liquid temperatures. The heated liquid is circulated by means of a pump (2) though supply conduit (3), through the heat exchange coil (4), and returned through conduit (5), to the expansion tank (6) and back to the heat generator (1). The source of heat to the secondary circuit is the heat exchanger coil (4) which transfers heat to a heat exchange reservoir (7), the liquid is circulated by the secondary pump (8) to the distribution manifold (9), through the line valves (10) to the flexible heat elements (11) which transfer the heat to the subject. The cooled liquid returns to the secondary expansion tank (12) and completes the circuit to the heat exchange reservoir (7). Liquid levels vary constantly during actual field operations as elements are added to, or removed from, the system and therefore it is necessary that the secondary supply of heated liquid is circulated independant of the primary circuit.
, ~ .
.. _ . ._ ........ _.. .
, . _ . .. _ _.. _ . . .. _ i.3 ~ . .
.
115811g In the interest of safety to the operator, the system operates on relative low temperatures (the average temperature of the heat elements being 43 C.) and at relative low water pressures (the secondary pump designed to develop approximately 5 lbs.PSI pressure in each of the heat elements). A temperature guage (14) and a pressure guage (15) are provided in order that the operator can monitor the system. A bypass valve (16) is provided in order that the system may be run prior to the connecting of the flexible heat elements.
Figure #1 - schematic drawing of portable heating system, Figure #2 and #3 - indicate typical applications of the process.
In the case of heating concrete the process is as follows:
a) The heat elements are placed in the best possible proximity to the mass which is to be heated.
b) The entire formwork is enclosed with an insulated cover.
c) The formwork is preheated prior to the placement of concrete.
d) The insulated cover is removed, the concrete placed and the cover re-applied.
e) Heat is maintained for the necessary length of time.
f) The insulated cover and the heat elements removed and made ready for re-use.
The system is suitable for applying heat to other subjects and is not necessarily confined to use in relation to concrete placement. Other typical uses are: heating water barrels, liquid propane storage tanks, thawing frozen ground, etc. Although this system has been shown and described with respect to a preferred embodiment, it should be understood that changes in form and detail may be made without departing from the spirit and scope of the invention.
I
Claims (3)
1. Flexible heat elements comprising of elongated vessels or hoses containing circulating preheated liquid, the elements being suitable for laying adjacent to, wrapping around or otherwise placing in close proximity to subjects of various shapes and configurations.
2. A portable construction heater comprising of a heat generating device, a water/glycol solution, and a system of circulating the liquid and transferring the heat to a secondary circuit, a system of circulating a secondary supply of heated liquid, through flexible heat elements as described in claim 1, and therein applying heat to subjects of various shapes and configurations.
3. A process for curing concrete during cold weather conditions which comprises of a portable construction heater as described in claim 2, connected to flexible heat elements as described in claim 1, which are placed in close proximity to preconstructed formwork which is insulated and covered prior to and after the placement of concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000402499A CA1158119A (en) | 1982-05-07 | 1982-05-07 | Portable heater (heat hoser) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000402499A CA1158119A (en) | 1982-05-07 | 1982-05-07 | Portable heater (heat hoser) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1158119A true CA1158119A (en) | 1983-12-06 |
Family
ID=4122733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000402499A Expired CA1158119A (en) | 1982-05-07 | 1982-05-07 | Portable heater (heat hoser) |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1158119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5964402A (en) * | 1997-10-07 | 1999-10-12 | T.H.E. Machine Company | Apparatus and method for heating a ground surface or volume of air with a portable hot water-type heating system |
| DE102015202933A1 (en) | 2015-02-18 | 2016-08-18 | Peri Gmbh | Attachment for a formwork and formwork with an attachment |
-
1982
- 1982-05-07 CA CA000402499A patent/CA1158119A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5964402A (en) * | 1997-10-07 | 1999-10-12 | T.H.E. Machine Company | Apparatus and method for heating a ground surface or volume of air with a portable hot water-type heating system |
| DE102015202933A1 (en) | 2015-02-18 | 2016-08-18 | Peri Gmbh | Attachment for a formwork and formwork with an attachment |
| WO2016131746A1 (en) | 2015-02-18 | 2016-08-25 | Peri Gmbh | Add-on part for a formwork, and formwork having an add-on part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |