CN2217777Y

CN2217777Y - Double-involute heat-exchanging coil type heat-exchanger

Info

Publication number: CN2217777Y
Application number: CN94217594U
Authority: CN
Inventors: 樊音序
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-20
Filing date: 1994-07-20
Publication date: 1996-01-17
Anticipated expiration: 2004-07-20

Abstract

The utility model relates to a double-involute heat-exchanging coil type heat exchanger in the type of cantilever. Inlets of a plurality of multibeams of coil pipes and an outlet of a single beam water returning coil pipe are respectively fixed on the shell of the heat exchanger through connecting pipes, and the other end of the coil pipe forms a free end of the cantilever through a connecting device. In the process of heat exchange, the coil pipe can take place elastic deformation because of temperature and pressure changes to make scale deposit fall off automatically. Simultaneously, the clearance of each ring of the coil pipe is more than eight millimeters. Because the scale can not be accumulated on the coil pipe, which is convenient for convection heat transport between cold water and hot water. The utility model can keep good heat exchange performance for a long time, and can reduce maintenance work and maintenance cost. The utility model can be used in cubage type heat exchangers and half heat type heat exchangers.

Description

Double involute heat exchange coil heat exchanger

The utility model relates to a kind of heat exchanger, and specifically a kind of double involute cantilevered heat exchange coil heat exchanger is the improvement to spiral cantilevered coil heat exchanger,

Its form of heat exchanger tube of spiral cantilevered coil heat exchanger commonly used is single involute-type now, its shortcoming is that no gap or gap are very little between interior two or three circle of coil pipe, after using a period of time, the incrustation scale of tying on these several ring outer walls connects together, be difficult for removing automatically, even come off a part automatically, because of the coil pipe horizontal positioned, and no gap or gap are very little between these several circles, the incrustation scale piece that comes off can not sink to housing bottom, and is deposited on the coil pipe or attached on the coil pipe, takes care of the pence, form the thick incrustation scale of one deck, thereby influence the heat exchange property of heat exchange coil.

The shortcoming of single involute-type coil pipe is that also the current dynamic resistance is big in the heat exchanging process, the convection heat transfer' heat-transfer by convection that is unfavorable for water, especially influence bigger to the water that is heated that flows, because of no gap or gap between the every circle of coil pipe very little, the current dynamic resistance is big, and the water convection heat transfer' heat-transfer by convection is not smooth, cause be heated inhomogeneous, even the water that has is not heated to predetermined temperature and flows away from shortcut, has a strong impact on the heat exchange property of heat exchange coil.The utility model designs for overcoming these shortcomings.

The utility model is finished like this, the one, heat exchange coil changes the double involute type into by single involute-type, wherein involute is controlled the gap between every circle, the diameter of another involute control coil pipe, the gap generally is controlled at 8 millimeters or bigger, the 2nd, add the bending radius of big coils inner ring, help coil pipe generation deformation, coil pipe outer wall scaling is to certain thickness, generally do not wait to 1 millimeter and promptly come off automatically at 0.1 millimeter, at least 8 millimeters in gap between the every circle of coil pipe, the incrustation scale of tying on every circle can not connect together between circle, automatically can not be deposited on the horizontal coil pipe after coming off yet, and can in the pipe seam crack, freely sink to the bottom surface of housing band taper, be convenient to discharge.Because of whole coil pipe can be at any time automatic desludging incessantly, the good heat exchange property of long-term maintenance, improved heat exchange efficiency, and maintenance work is easy, maintenance cost is extremely low, so reached energy-efficient purpose, increase because of the every ring gap of coil pipe for the water (for example in the semi instant heating heat exchanger) that is heated that is flowing, the resistance that water flows reduces, being heated cold water and coil pipe contact area increases, be heated evenly, be convenient to the hot and cold water convection heat transfer' heat-transfer by convection, also promptly improved heat exchange efficiency, reached energy-efficient purpose equally, even in volumetric heat exchanger, because every ring gap increases the convection heat transfer' heat-transfer by convection of equally also being convenient to hot and cold water, so the utility model heat exchanger is a kind of energy-efficient, the desirable heat-exchange device of long service life, be widely used in positive displacement and the semi instant heating heat exchanger, according to heat exchange amount needs, heat exchanger can be done very for a short time, also can do quite greatly, as long as with the parallel connection of some groups of heat exchange coil interchangers, parallel connection, in parallel again getting final product.In discontinuous steam boiler (belonging to a kind of volumetric heat exchanger), heat exchange coil is horizontally fixed on housing bottom, keeps the gap with the taper bottom surface, and sewage draining exit is in the extreme lower position of taper bottom surface.Because it is gapped between heat exchange coil, volume is little, so temperature sensor can insert in the gap between the coil pipe, the lower interface of its interface and water level meter, boiling water export on same horizontal plane, boiler is realized the whole process indication of temperature, water level, and is safe and convenient to use.

Below in conjunction with accompanying drawing the utility model is described further.

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is single involute heat exchange coil schematic diagrames.

Accompanying drawing 3 is double involute heat exchange coil schematic diagrames.

With reference to accompanying drawing 1 and the embodiment that provides, present embodiment is a vapor heat exchanger, and profile is a tubular.The steam inlet end 10 of multi beam double involute heat exchange coil and the double involute backwater heat exchange coil port of export 14 are fixed on the housing 9 by tube connector 15 respectively, multi beam double involute

heat exchange coil

12,13 be arranged in parallel side by side, keeps at a distance, horizontal fixed, also can be vertically, tilt to be fixed on the housing that present embodiment is a horizontal fixed.Heat exchange coil has multiple combination, and the hot media inlet pipe is a single tube, also can be the parallel connection of multi beam coil pipe.The present embodiment steam inlet pipe is that four pipes are in parallel; The hot media outlet is a single tube, also can be multitube parallel.The present embodiment outlet is a single tube.Heat exchange coil steam inlet end 10 taps into steam ports 2, and outlet 14 connects steam trap 16.The other end of heat exchange coil is that cantilever free end is connected by linker 11, the condensate water of multi beam coil pipe all enters the backwater coil pipe by this linker, and condensed water in high temperature cools off by this supercooling apparatus, thereby makes the condensing water temperature of outflow lower, reach sufficient heat exchange, improve the thermal efficiency.When steam entered multi beam heat exchange coil 12 and carries out heat exchange with cold water, along with the variation of temperature and pressure, the cantilever free end 11 of

heat exchange coil

12,13 was flexible automatically, whole coil pipe generation deformation and vibration, produce maximum perturbation to being heated cold water, promptly be equivalent to stir, improved heat exchange efficiency.Different at the coefficient of thermal expansion and contraction of its surperficial incrustation scale with knot because of the metal coil pipe, by the deformation power of object own, the large deformation of metal coil pipe makes incrustation scale

Accompanying drawing 1 explanation:

1. cooling water inlet, 2. steam inlet, 3. temperature-sensing valve, 4. temperature sensor, 5. pressure gauge connection, 6. relief valve connection, 7. hot water outlet, 8. thermometer interface, 9. heat exchanger shell, 10. Double-involute heat-exchanging coil type steam inlet end, 11. heat exchange coil cantilever free end linker, 12. the multi beam heat exchange coil, 13. double involute backwater heat exchange coils, the 14. backwater coil pipe ports of export, 15. tube connector, 16. steam trap, 17. sewage draining exits, 18. ball valves.

Accompanying drawing 2 explanations:

1. coil pipe cantilever free end, 2. coil pipe steam inlet end (being the condensate water port of export when making the backwater coil pipe), 3. heat exchange coil does not 4. have the gap between the coil pipe circle, 5. the wall scroll involute.

Accompanying drawing 3 explanations:

1. coil pipe cantilever free end, 2. coil pipe steam inlet end (being the condensate water port of export when making the backwater coil pipe), 3. heat exchange coil, 4. between the coil pipe circle gap generally greater than 8 millimeters, 5. article one involute, 6. second involute.

Claims

1. heat exchanger, comprise heat exchange coil and housing in the structure, it is characterized in that keeping between the every circle of described heat exchange coil 8 millimeters gaps, adjust according to the different needs backlash freedom, specifically determine that by two involutes the hot media entrance point of heat exchange coil is fixed on the housing of heat exchanger, the bottom surface of housing is taper, the other end of heat exchange coil is connected into cantilever-shaped free end by linker, and all heat exchanger tubes are double involute cantilever coil pipe.

2. by the described heat exchanger of claim 1, it is characterized in that described heat exchange coil has multiple combination: the hot media inlet pipe is a single tube, also can be the parallel connection of multi beam coil pipe; The hot media outlet is a single tube, also can be multitube parallel.

3. by the described heat exchanger of claim 1, it is characterized in that parallel connection, the parallel connection, in parallel again of some groups of heat exchange coil interchangers.

4. by the described heat exchanger of claim 1, it is characterized in that heat exchange coil is horizontally fixed on housing bottom in discontinuous steam boiler, keep the gap with the taper bottom surface, sewage draining exit is in the extreme lower position of taper bottom surface, and the lower interface of temperature sensor interface, water level meter, boiling water export on same horizontal plane.

5. by the described heat exchanger of claim 1, it is characterized in that heat exchange coil be arranged, keeps the gap in parallel, horizontal fixed also can be vertically, tilt to be fixed on the housing.

6. by the described heat exchanger of claim 1, it is characterized in that heat exchange coil is the double involute shape.