CN202149635U

CN202149635U - Selective one-way steam discharge pipe for solar flat plate collector

Info

Publication number: CN202149635U
Application number: CN 201120258219
Authority: CN
Inventors: 高元运; 沈银
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-02-22
Anticipated expiration: 2021-07-20

Abstract

The utility model discloses a selective one-way steam discharge pipe for a solar flat plate collector, which comprises a steam discharge pipe, wherein a spherical flexible film which protrudes outwards is arranged in the steam discharge pipe; a folded line type air channel is arranged at the external port of the steam discharge pipe; a filter screen is arranged outside the steam discharge pipe; and an annular groove is arranged at the outer end of the steam discharge pipe. The selective one-way steam discharge pipe disclosed by the utility model solves the problems of dehumidification and moisture protection of the collector steam discharge pipe and positive/negative pressure protection of collector cavities, so that the overall performance of the collector is stable and permanent.

Description

Flat-plate solar collector selectable one-way gland steam exhauster

Technical field

The utility model relates to the solar thermal collector technical field, specifically belongs to flat-plate solar collector selectable one-way gland steam exhauster.

Background technology

Flat-plate solar collector can be brought into the equilibrium water conten of material therefor in the heat collector cavity of processing in making process and go; And because of the not seal of heat collector cavity; In use have outside moisture again and infiltrate in the cavity, thereby further strengthened the moisture in the heat collector cavity like rain water or damp vapour.These moisture shine or can be evaporated out during hot operation in that heat collector is empty, when temperature reduces, then can be condensed again and stick to table and absorber surperficial formation water smoke and steam cap rock in, and all these multi-form moisture can cause following adverse consequences.The heat-insulating material thermal conductivity factor rises, and heat waste increases; The cap rock transmitance descends, and the sun is injected energy and reduced: absorbed layer makes moist, and makes the rotten degeneration of coating; On the dissimilar metal tube plate absorber, can produce electrochemical corrosion.These cause the thermal performance of collectors decline lost of life.Because technical reason, heat collector is difficult to accomplish airtight, but the respiration that therefore has can play some hydrofuge effects, also is unlikely to form the high pressure in the cavity; Yet this mode is unordered, is not artificially controllable, and hydrofuge is limited, because respiration also can suck the wet steam of outside inside cavity and increase internal moisture, so its hydrofuge is incomplete; Even more serious is this heat collector fundamentally can't be realized the working environment that inside cavity is dry because of its not seal immersion infiltration of just being difficult to prevent rainwater; For adding an exhaust hole, this can effectively get rid of steam in the cavity really non-airtight heat collector top people, but same reason also can be passed through this hole counter tide, and passes through the breathing in this hole, the loss that also can produce heat; On the seal heat collector, add and to block up exhaust hole; It is blocked outlet with steam discharge behind the empty solarization of heat collector hydrofuge, then can not produce follow-up counter tide; Do not have original because of breathe the thermal loss that produces through gland steam exhauster yet; But the positive and negative pressure that extremely high low temperature produced also can cause cavity and damage or distortion, though can make the vapour locking of installing additional have the safeguard protection effect, always can be to bringing some troubles on the operational administrative.

The utility model content

The purpose of the utility model provides flat-plate solar collector selectable one-way gland steam exhauster, solves the protection against the tide of heat collector hydrofuge and the problem that positive negative pressure is protected is appearred in the heat collector cavity, makes heat collector overall performance stable and durable.

The technical scheme that the utility model adopts is following:

Flat-plate solar collector selectable one-way gland steam exhauster comprises gland steam exhauster, is provided with cambered outwards sphere fexible film in the described gland steam exhauster, and external port has the broken-line type air flue, and the outside is provided with screen pack, and the outer end has cannelure.

Described sphere fexible film outward flange is thick, and the middle part is thin, and its heartcut of symmetry has " cross " or " star " shape otch and forms flap.

Described gland steam exhauster is an elastic rubber pipe.

Compared with present technology, the beneficial effect of the utility model is following:

The utility model is compared prior art and is raise at the heat collector cavity temperature; When malleation was big in the cavity, steam was more outwards washed flap open and is discharged wet steam just, therefore pressed bigger when needing the protection cavity in the non-temperature rise; This flap is closed, the heat waste when reducing the hot gas discharge as far as possible; Owing to the flap reasons in structure, its pressure reduction of outwards opening is less, and inwardly opening pressure reduction need be bigger, so under the cavity intrinsic safety negative pressure, flap is also closed, when outside high humidity, does not have wet steam and gives birth to the infiltration cavity and form counter tide; In like manner, outside moisture can not infiltrate cavity yet; Because the protection that the positive and negative safe pressure reduction of flap selectivity is opened has reduced the requirement to cavity body structure intensity, has reduced material consumption, and the heat collector cost is reduced; Because the hydrofuge moisture-proof role of this valve under the prerequisite of positive negative pressure safety; Make the working environment that can keep a relatively dry in the cavity; Thereby reduce that the cap rock transmitance of bringing because of interior vapour and moisture reduces, the increasing of heat-insulating material thermal conductivity factor rising heat waste; The xenogenesis tube sheet produces electrochemical corrosion, problems such as absorber coatings decline, and it is more stable that thermal performance of collectors is able to; Good and the cavity body structure of inside cavity working environment also obtains positive negative pressure safeguard protection, and the heat collector whole service life is prolonged.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the A-A sectional structure sketch map of the utility model;

Fig. 3 is the B-B sectional structure sketch map of the utility model.

The specific embodiment

Referring to accompanying drawing, flat-plate solar collector selectable one-way gland steam exhauster, the gland steam exhauster of making by an elastic rubber pipe 1; Its outer end has a cannelure 3 to may be stuck on the circular hole of heat collector frame, and a selectable one-way flap 2 is arranged on the internal channel of gland steam exhauster 1, and flap 2 is cut with " cross " or " star " shape otch 6 by sphere fexible film symmetrical centre;, temperature rises in cavity, and pressure strengthens; Inside and outside differential pressure is brought up to flap 2 working values, also is when moisture is arranged, and is easy in the evaporation; This moment, flap 2 was just opened, and wet steam is discharged.When heat collector feeding working media puts into operation; The condition that has not had empty solarization high temperature to occur; Just do not had inside and outside High Pressure Difference can reach the condition of flap 2 action yet, then sealed, promptly can stop the infiltration of outside moisture such as rainwater and wet steam at heat collector normal work period gland steam exhauster 1.But at heat collector for some reason during Long-time Shut-down, if during the fault generating HTHP, reach the working value of flap 2 this moment, and then the exhaust steam valve pipe is opened, and makes heat collector be able to protected.When heat collector is worked at utmost point cold zone; On the cold date, in the heat collector cavity, can produce extremely low temperature and form negative pressure night sometimes, the excessive danger that also can produce cavity damage and distortion of negative pressure like this; This moment, flap 2 can oppositely be opened, and was able to reach the protection cavity and got purpose.Just this safe action value is big more than the forward security working value, and this is that material, structure and the dimensional parameters of flap 2 of the present invention determines.Say that qualitatively because the outer protrudent sphere film of the non-uniform thickness of flap 2 is when making its positive action, the little limb of flap 2 just produces to produce to stretch to rotate around its root along cutting mouth and get final product, need power less; And when counteragent; The little limb of flap 2 can produce extruding force on cutting mouth; Have only bigger opposite force to overcome after the power of counter-force that the otch extruding produces and crimp; Little valve flap just can break away from each other and inwardly stretch and rotate, and reverse in other words working value can be bigger, but must be controlled in the safety value.For prevent external environment condition to flap 2 work influence, be provided with in the outside of flap and filter silk screen 5 and broken line air flue 4.

Claims

1. flat-plate solar collector selectable one-way gland steam exhauster comprises gland steam exhauster, it is characterized in that: be provided with cambered outwards sphere fexible film in the described gland steam exhauster, external port has the broken-line type air flue, and the outside is provided with screen pack, and the outer end has cannelure.

2. according to the said flat-plate solar collector selectable one-way of claim 1 gland steam exhauster, it is characterized in that: described sphere fexible film outward flange is thick, and the middle part is thin, and its heartcut of symmetry has the flap of " cross " or " star " shape otch.

3. according to the said flat-plate solar collector selectable one-way of claim 1 gland steam exhauster, it is characterized in that: described gland steam exhauster is an elastic rubber pipe.