CN203678235U - Pre-cooler structure for air drying device - Google Patents

Abstract

The utility model discloses a pre-cooler structure for an air drying device. The pre-cooler comprises a long-strip-shaped pre-cooler casing horizontally arranged, wherein the inner part of the pre-cooler casing is divided into an air inlet hollow cavity, a heat exchange hollow cavity and an air outlet hollow cavity; a plurality of heat exchange pipes are horizontally arranged in the heat exchange hollow cavity; the air inlet hollow cavity of the pre-cooler casing and an air outlet of a gas-water separator are communicated with each other; the air outlet hollow cavity of the pre-cooler casing is connected with an air outlet pipeline; an air inlet connected with an air outlet of an air compressor is formed in the pre-cooler casing at one end of the heat exchange hollow cavity, and an air outlet connected with an air inlet of a condenser is formed in the pre-cooler casing at the other end of the heat exchange hollow cavity; supporting plates staggered at intervals are arranged on the upper side and the lower side in the heat exchange hollow cavity, the supporting plates are entirely and obliquely arranged, and the heat exchange pipes are fixed in the supporting plates in a way of penetrating through the supporting plates. The pre-cooler structure has a simple structure, can pre-cool incoming air to improve the cold-heat exchange efficiency so as to improve the drying effect, and also has the advantage of avoiding condensation of moisture of the air outlet pipeline.

Description

A kind of air dry-set forecooler structure

Technical field

The utility model relates to a kind of air dry-set, especially a kind of air dry-set forecooler structure.

Background technology

In large-scale substation, when installation of electrical equipment and maintenance, each appliance contact is usually exposed in air, and the easy explosion caused danger that waits, exists great potential safety hazard.Therefore need to consider the air of equipment room to be dried, or need to supply dry air at device interior in the time of the large scale electrical power unit maintenance such as reactor, the dry air providing can guarantee that the built-in electrical insulation of power equipment is unlikely and make moist, and maintainer can not suffocate because of anoxic in the time that device interior is worked.

This mode that dry air is provided, mode compared with the supply of nitrogen often adopting in prior art is overhauled safer, reliably, economical, convenient, in the time using the inflation of dry air machine to carry out overhaul of the equipments, the impact, particularly operation overnight that not changed by extraneous weather conditions, only need seal flange everywhere, fill dry air 0.02-0.03MPa, and do not need oiling, the electric equipments such as transformer, reactor also can not make moist, reduce oil pumping every day, the workload of oiling, has reached shortening maintenance duration, improves the effect of repair quality.Meanwhile, in maintenance oil strain process, can inflate oiling equipment box and fluid dry, raising oil strain efficiency (more than one times); When oil strain, can ensure that oil insulation improves and the reduction of moisture in the rainy day.In transformer transporting process, transformer is received on dry air generator, by dry air generator, air is dried and purified treatment, dry air dew point is reached below-60 DEG C, gas purification precision≤0.01 μ m, to not inflating with the transformer of oil transport, and guarantee ne-leakage.Can significantly reduce the cost of transportation of overweight transformer and avoid occurring the on-the-spot possibility that anoxic accident occurs.In prior art, for Substation Electric Equipment maintenance provides the equipment of dry air all fairly simple, the disclosed a kind of compressed-air drier of for example China's number of patent application 201210102739.4, its structure comprises compressor, one end of compressor is connected with one end of condenser by pipeline, the other end of condenser is connected with one end of device for drying and filtering by pipeline, the other end of device for drying and filtering is connected with one end of expansion valve by pipeline, the other end of compressor is connected with evaporimeter one end by pipeline, the other end of evaporimeter is connected with the other end of expansion valve by pipeline, one end near evaporimeter is provided with expansion valve sensor, expansion valve sensor is connected with expansion valve, in evaporimeter, be provided with air inlet and air outlet, air outlet place is provided with liquid-level switch, the bottom of evaporimeter is connected with outlet pipe, outlet pipe is provided with magnetic valve.

The compressed-air drier of above-mentioned existing structure, its structure is comparatively simple, if dry function is carried out in cold and hot conversion after only can realizing simple air compressing.Still there is following defect.

1, condensation portion structure is only a common housing and inner heat exchanger coil, and simple in structure, cold heat exchange effect is poor, and condensed steam is difficult to sufficient discharge.2, in condensation portion structure, coil pipe employing is simply air-cooled, and cooling effect is poor, is difficult to satisfy the demands; In evaporimeter, coil temperature lacks control simultaneously, easily freezes and causes the problems such as obstruction.3, induction part is not filtered, and easily enters some foreign material and causes line clogging, equipment fault.

In order to address the above problem, applicant has considered to design a kind of air dry-set being made up of drying system and cooling recirculation system, wherein considers to set up moisture trap to improve gas-water separation effect, and then improves drying effect.But wherein, also need to consider how air inlet is carried out to precooling, to improve cold and hot exchange efficiency, finally improve drying effect, avoid the problem of air outlet pipe dewfall simultaneously.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is, how to provide a kind of simple in structure, can carry out precooling to air inlet, to improve cold and hot exchange efficiency, finally improve drying effect, avoid the air dry-set forecooler structure of air outlet pipe dewfall simultaneously.

In order to solve the problems of the technologies described above, in the utility model, adopt following technical scheme:

A kind of air dry-set forecooler structure, it is characterized in that, described forecooler comprises the horizontally disposed forecooler housing of strip, forecooler enclosure interior is vertically provided with two endplates near end positions, two endplate surrounding sealings are fixed on forecooler housing and by forecooler housing inner chamber and are divided into air inlet cavity, heat exchange cavity and the cavity of giving vent to anger, some heat-exchange tubes in heat exchange cavity, are horizontally disposed with, heat-exchange tube is uniformly distributed and two endplates are run through to air inlet cavity and giving vent to anger in cavity in two ends at perpendicular, the air inlet cavity of forecooler housing and the gas outlet of moisture trap are connected, the cavity of giving vent to anger of forecooler housing is connected with outlet pipe, on the forecooler housing of heat exchange cavity one end, there is the air inlet being connected with the gas outlet of air compressor, on the forecooler housing of the heat exchange cavity other end, there is the gas outlet being connected with condenser air inlet, upper and lower both sides also have staggered spaced gripper shoe in heat exchange cavity, gripper shoe entirety be all obliquely installed and make heat-exchange tube run through fixing in the inner.

In the utility model, forecooler, for compressed air is carried out to precooling, improves cold and hot exchange efficiency, and the pre-cooler of originally optimizing structure has adopted row's air outside preparing after cold and hot exchange and gas-water separation to meet cold to the air after just compressing; Air-treatment has well been carried out sufficient heating before outer row like this, guarantees not dewfall of outlet air pipeline; Take full advantage of the low-temperature receiver of outlet air simultaneously, ensured the condensation effect of board refrigeration system, provide cost savings, guaranteed the quality of board outlet air.Wherein, in heat exchange cavity, the oblique gripper shoe being crisscross arranged can improve forecooler bulk strength, has and can carry out baffling to air, has farthest improved heat exchanger effectiveness.

In sum, the utlity model has simple in structurely, can carry out precooling to air inlet, to improve cold and hot exchange efficiency, finally improve drying effect, avoid the advantage of air outlet pipe dewfall simultaneously.

Brief description of the drawings

Fig. 1 is the structural representation of a kind of air dry-set that has adopted the utility model structure while specifically implementing.

Detailed description of the invention

Below in conjunction with a kind of air dry-set that has adopted the utility model structure and accompanying drawing thereof, the utility model is described in further detail.

In this detailed description of the invention, as shown in Figure 1, a kind of air dry-set that adopts the utility model structure, comprise air compressor 1, evaporimeter 2, refrigerant compressor 3 and refrigerant cooling coil 4, after being connected with refrigerant cooling coil 4, described refrigerant compressor 3 ports of export are connected to the cooling medium inlet of evaporimeter 2, the cooling medium outlet of evaporimeter 2 is connected back refrigerant compressor 3 entrance points and is formed cooling recirculation system by pipeline, in cooling recirculation system, be positioned on the pipeline in cooling medium exit of evaporimeter and be also provided with Pressure gauge 5, on pipeline between described refrigerant cooling coil 4 and evaporimeter 2, be also disposed with device for drying and filtering 6 and heating power expansion valve 7, the gas outlet of described air compressor 1 is connected with the air inlet of evaporimeter 2, and gas outlet and the outlet pipe of evaporimeter 2 are connected to form drying system, wherein, the gas outlet of described evaporimeter 2 is also connected with a moisture trap 8, moisture trap 8 has a vertical moisture trap housing 81 arranging, be positioned at the tangential air inlet 82 arranging in moisture trap housing 81 sides and be positioned at the gas outlet 83 at top, the gas outlet 83 of described moisture trap is connected with outlet pipe 10 by forecooler 9.

Described moisture trap housing 81 middle parts have a horizontally disposed dividing plate 84, dividing plate 84 belows have primary separation portion, described initial gross separation portion has the inner chamber that an entirety is drum-shaped, initial gross separation portion inner chamber upper level tangentially arranges the air inlet 82 of moisture trap, initial gross separation portion inner chamber middle part has the gas outlet 85 of vertical setting, described gas outlet 85 upper ends connect and are connected to dividing plate 84 upper ends, on described gas outlet 85, be also provided with the circular baffle plate 86 that a circle lateral has a down dip, circular baffle plate 86 edges are lower than air inlet position; Described dividing plate 84 tops have secondary separation unit, described secondary separation unit has the inner chamber of a rectangular body of entirety, the ramped bottom surface that the gas outlet upper port position at Wei Xiang center, inner chamber bottom surface tilts, the staggered hydraulic barrier 87 that is fixedly installed rectangle in secondary separation unit inner chamber both sides, it is the inclined-plane tilting to outer lower side that each hydraulic barrier 87 entirety are horizontally disposed and upper surface, and secondary separation unit inner cavity top is gas outlet.

Described moisture trap housing 81 lower ends have an automatic outletting mechanism, described automatic outletting mechanism comprises the cylindrical section of a reduced of the housing inner chamber bottom that is positioned at moisture trap, in cylindrical section, be provided with a float 88, described float 88 lower ends are spherical and are engaged in a downward drain pipe upper port at middle part, cylindrical section lower surface, described drain pipe upper port and float cooperation place are provided with an elastic rubber ring, described float upper end is formed and is had the columnar structured of hollow cavity 89 by top cylinder section and the docking of doffing section, and top cylinder section and doffing section adopt the screw thread cooperation that spins.

Described evaporimeter 2 comprises the evaporator shell 21 of overall rectangular body, in evaporator shell 21, be provided with refrigeration coil 22, refrigeration coil 22 two ends are cooling medium inlet and the cooling medium outlet being fixed on evaporator shell, evaporator shell is the also staggered refrigeration coil fixed head 23 that is arranged at intervals with of both sides Shang Xia 21, between system, cooling coil fixed head 23 is interval between the air inlet of evaporator shell 21 and gas outlet and is obliquely installed in the same way, and refrigeration coil 22 runs through and is fixed on each refrigeration coil fixed head 23.

In drying system, described forecooler 9 comprises the horizontally disposed forecooler housing 91 of strip, forecooler housing 91 is inner is vertically provided with two endplates 92 near end positions, two endplate 92 surrounding sealings are fixed on forecooler housing 91 and by forecooler housing inner chamber and are divided into air inlet cavity, heat exchange cavity and the cavity of giving vent to anger, some heat-exchange tubes 93 in heat exchange cavity, are horizontally disposed with, heat-exchange tube 93 is uniformly distributed and two endplates are run through to air inlet cavity and giving vent to anger in cavity in two ends at perpendicular, the air inlet cavity of forecooler housing 91 and the gas outlet of moisture trap 8 are connected, the cavity of giving vent to anger of forecooler housing 91 is connected with outlet pipe 10, on the forecooler housing 91 of heat exchange cavity one end, there is the air inlet being connected with the gas outlet of air compressor 1, on the forecooler housing 91 of the heat exchange cavity other end, there is the gas outlet being connected with condenser air inlet, upper and lower both sides also have staggered spaced gripper shoe 94 in heat exchange cavity, gripper shoe 94 entirety be all obliquely installed and make heat-exchange tube 93 run through fixing in the inner.

In drying system, described air compressor 1 air inlet place is also provided with inlet air filtration mechanism, described inlet air filtration mechanism, comprise overall cylindrical circular filtration housing 11, filter the down turnover cover 12 that housing 11 bottoms have a semi-barrel shape, on down turnover cover 12, be installed with entirety and be disc and be arranged at intervals at the screen pack 13 that filters enclosure interior, described down turnover cover 12 1 sides are hingedly fixed in filters on housing 11, and down turnover cover opposite side is connected with filtration housing 11 by fixed mechanism.Described fixed mechanism, comprises that entirety is the hanging part 14 of semicircle annular, and hanging part 14 one end are arranged on rotationally filters on housing 11, after hanging part 14 other end rotations, can insert and be fixed in the spliced eye that is arranged on a plug connector 15 on down turnover cover 12.

In cooling recirculation system, be also provided with by-pass line 31, by-pass line 31 one end and be connected in the pipeline of refrigerant cooling coil 4 between evaporimeter 2 and connect, the other end by a three-way control valve 32 and be connected in refrigerant compressor 3 and evaporimeter 2 between pipeline be connected.

In cooling recirculation system, refrigerant cooling coil 4 places are also provided with fan 41 and Air-conditioner with deep cooling function structure, described Air-conditioner with deep cooling function structure includes a water pipe 42 that is positioned at refrigerant cooling coil 4 tops, water pipe 42 lower surfaces are provided with row's water seepage hole, are connected with the cloth 43 being overlapped on refrigerant cooling coil on water seepage hole downwards.

When above-mentioned air dry-set uses, in drying system, air enters air compressor and enters into forecooler after compressed and carry out precooling after inlet air filtration mechanism filters, then entering into evaporimeter carries out the cooling moisture that makes be condensed into water droplet under high pressure and low-temperature condition, then enter into moisture trap and carry out gas-water separation, then enter into the air precooling of forecooler to firm compression, be finally discharged to by outlet pipe the place that needs dry air.In cooling recirculation system, refrigerant is compressed in refrigerant compressor, then in refrigerant coil pipe, be cooled, refrigerant is liquefied, then device for drying and filtering is input in evaporimeter after filtering, and makes its heat absorption of gasifying in evaporimeter, to the air cooling-down in evaporimeter by thermal expansion valve regulation, refrigerant after gasification is got back in refrigerant compressor by pipeline, circulates with this.

In this air dry-set, in drying system, set up moisture trap, moisture trap adopts the mode of cyclone centrifugal separation, can make the drop that freeze-outs after compressed air condensation can be better and air separation, and then has improved air dried effect.

Specifically, in moisture trap housing, in initial gross separation portion, adopt cyclone centrifugal separation, on gas outlet, set up circular baffle plate simultaneously, like this, can force better distinguished and admirable enter initial gross separation portion inner chamber backward press close to the direction rotation of perisporium, make heavier liquid can be attached to better down following current on perisporium, distinguished and admirable down crossing after circular baffle plate, gas part upwards flows from gas outlet bottom after converging to middle part again; Therefore improved better gas-water separation effect.Dividing plate top, then be provided with a secondary separation unit, gas is from gas outlet enters dividing plate top like this, form the collapsible rising in left and right through multiple hydraulic barriers, slow down wind speed, further make not separate in air clean water and drip and be attached on hydraulic barrier, improve gas-water separation effect; The design of hydraulic barrier makes the water droplet adhering to can descend very soon inflow moisture trap bottom, avoids secondary volatilization; Therefore further improved gas-water separation effect.Overall drying effect is significantly improved.When concrete enforcement, internal chamber wall, the upper surface of circular baffle plate, secondary separation unit surface of internal cavity and the hydraulic barrier surface of described primary separation portion are provided with the water accepting layer being made up of hydrophilic material, preferably adopt hydrophily cotton; Water droplet in absorbed air so better, improves separating effect.

The automatic outletting mechanism arranging, while making there is no ponding in cylindrical section, the spherical of float lower end can be blocked drain pipe upper port, when after cylindrical section internal water accumulation, ponding floods after float, float floating, ponding is discharged from drain pipe under gas pressure, has realized automatic outletting.Drain pipe upper port is provided with elastic rubber ring and float bottom spherical coordinates, and can block better opening, avoids leaking.Float upper end is designed to the hollow structure of top cylinder section and the docking of doffing section, like this, after can outwarding winding, in hollow cavity, add balancing weight to change float deadweight, can change float volume by the rotation top cylinder section screw thread degree of depth that spins, and then reach the effect that the amount of automatic drain can be adjusted as required flexibly.

In evaporimeter, refrigeration coil fixed head one can play the fixing effect of strengthening to cooling coil and avoid in the cold and hot conversion of the cooling coil defect of easy deformation fracture afterwards, refrigeration coil fixed head is oblique is simultaneously arranged so that the air-flow entering becomes deflector type and moves ahead, extend fully air-flow travel path, improved heat exchanger effectiveness simultaneously.

The forecooler arranging in drying system, for compressed air is carried out to precooling, improves cold and hot exchange efficiency, and the pre-cooler of originally optimizing structure has adopted row's air outside preparing after cold and hot exchange and gas-water separation to meet cold to the air after just compressing; Air-treatment has well been carried out sufficient heating before outer row like this, guarantees not dewfall of outlet air pipeline; Take full advantage of the low-temperature receiver of outlet air simultaneously, ensured the condensation effect of board refrigeration system, provide cost savings, guaranteed the quality of board outlet air.Wherein, in heat exchange cavity, the oblique gripper shoe being crisscross arranged can improve forecooler bulk strength, has and can carry out baffling to air, has farthest improved heat exchanger effectiveness.

Air compressor air inlet place is also provided with inlet air filtration mechanism, and inlet air filtration mechanism can tentatively filter air inlet, avoids some bulky grain objects or floating thing to enter into damage of facilities pipeline.Meanwhile, this filter mechanism self has conveniently assemble and disassemble, is convenient to the advantages such as cleaning.The fixed mechanism arranging, can facilitate the opening and closing locking of filter mechanism, and fixed mechanism is simple in structure but that operation is very easy is quick.

In cooling recirculation system, be also provided with by-pass line, can be controlled evaporator refrigerant temperature.When normal work, three-way control valve cuts out by-pass line, when the evaporating pressure that evaporimeter detected is lower than to a certain degree time, now can by-pass line be opened by three-way control valve, the higher gas of temperature that evaporimeter is refluxed is directly back to the cooling medium arrival end of evaporimeter by by-pass line, avoid the phenomenon of freezing and stopping up.

In cooling recirculation system, refrigerant cooling coil place is also provided with fan and Air-conditioner with deep cooling function structure, because the heat of refrigerant cooling coil place internal refrigeration storage medium in cooling recirculation system comprises that refrigerant is by the heat absorbing in the heat of compressor compression generation and evaporimeter like this, therefore need the heat of release larger, common air-cooled being difficult to meets the demands; Therefore set up the structure of water-cooled, make air-cooled and water-cooled combination, can greatly improve refrigerant cooling coil place heat exchanger effectiveness, improve cooling effect, and then improve better refrigeration.

Therefore it is effective that above-mentioned air dry-set has cold and hot exchange, the collection that is beneficial to condensing water vapor is arranged outward, and drying effect is good, and condenser coil good cooling results is more conducive to the advantages such as control.

Claims (1)

1. an air dry-set forecooler structure, it is characterized in that, described forecooler comprises the horizontally disposed forecooler housing of strip, forecooler enclosure interior is vertically provided with two endplates near end positions, two endplate surrounding sealings are fixed on forecooler housing and by forecooler housing inner chamber and are divided into air inlet cavity, heat exchange cavity and the cavity of giving vent to anger, some heat-exchange tubes in heat exchange cavity, are horizontally disposed with, heat-exchange tube is uniformly distributed and two endplates are run through to air inlet cavity and giving vent to anger in cavity in two ends at perpendicular, the air inlet cavity of forecooler housing and the gas outlet of moisture trap are connected, the cavity of giving vent to anger of forecooler housing is connected with outlet pipe, on the forecooler housing of heat exchange cavity one end, there is the air inlet being connected with the gas outlet of air compressor, on the forecooler housing of the heat exchange cavity other end, there is the gas outlet being connected with condenser air inlet, upper and lower both sides also have staggered spaced gripper shoe in heat exchange cavity, gripper shoe entirety be all obliquely installed and make heat-exchange tube run through fixing in the inner.

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