CN209512558U - A kind of anti-freeze closed cooling tower - Google Patents

Abstract

The utility model discloses a kind of anti-freeze closed cooling towers, including the heat exchanger being made of several groups coil pipe unit array, the total water inlet of heat exchanger is connected with import tee pipe coupling, the water outlet that import tee pipe coupling has an interface to connect water circulating pump by the first valve, the water inlet of water circulating pump is connected to pond, another interface of import tee pipe coupling connects a cfentrifugal blower by the second valve；Total discharge outlet of heat exchanger connects pond using pipeline.The residual water heat-exchanger pipeline is discharged in the utility model after cooling tower shutdown, cannot run well when preventing because of icing bursting by freezing pipeline and avoiding turning back on.

Description

A kind of anti-freeze closed cooling tower

Technical field

The utility model relates to technical field of refrigeration equipment, and in particular to a kind of antifreeze improvement device of closed cooling tower.

Background technique

The closed cooling tower of the prior art typically inputs water to be cooled in one end of cooling pipe, through heat exchanger Heat exchange is discharged from the other end of cooling pipe again, but the surplus water in cooling pipe can not exclude completely completely in general , especially in the low side position of heat exchanger, these water of residual in the duct, in time in winter in the especially northerly winter It easily freezes in season, it is well known that water volume when freezing will increase, easily spalling pipeline.Therefore it is necessary to will remain in pipe for pole Water in road excludes clean.However the pipeline of the closed cooling tower heat exchanger of the prior art is all without special drainage arrangement, It can only be flowed out naturally with it, how much flow out how many calculations, the residual of water is also just at unavoidable result.

Summary of the invention

The purpose of this utility model is that have residual water in the closed cooling tower heat exchange pipeline for overcome the prior art not arranging Only, the defect for causing the adverse consequences of freezed in winter spalling pipeline, provide it is a kind of will be remained in heat exchanger tube water exclude it is clean Device.

The purpose of this utility model is achieved through the following technical solutions.

A kind of anti-freeze closed cooling tower, including the heat exchanger being made of several groups coil pipe unit array, characterized in that change The total water inlet of hot device is connected with import tee pipe coupling, and import tee pipe coupling has an interface to follow by the connection of the first valve The water outlet of ring water pump, the water inlet of water circulating pump are connected to pond, another interface of import tee pipe coupling passes through the second valve Door one cfentrifugal blower of connection；Total discharge outlet of heat exchanger connects pond using pipeline.

Preferred embodiment, the first valve and the second valve are all parallel sliding gate valve.

The closure member of parallel sliding gate valve is the double disc therebetween with spreading mechanism, its advantage is that flow resistance is small, flow resistance It is similar with the flow resistance of short straight tube, so that sealing surface is automatically positioned by means of spreading mechanism such as spring, such valve with electric drive both It is economical and reliable, it is highly suitable for as stop valve.

Preferred embodiment, the first valve and the second valve are all Electronic control, and the on or off of the first valve and the second valve The corresponding interlocking of off and on.The relationship of the two is that have and only one valve is open-minded.

Preferred embodiment, total discharge outlet connect an outlet tee pipe coupling, and outlet tee pipe coupling has an interface to pass through One normally open solenoid valve recycles hose to lead directly to pond, and another interface passes through a normally closed solenoid valve and a centrifugal water pump Water inlet connection, the water outlet of centrifugal water pump leads directly to pond by hose；Normally closed solenoid valve open and normally open solenoid valve Closing controlled by a delay switch, delay switch starting it is synchronous with the starting for the centrifugal water pump for being located at total water inlet.

Cfentrifugal blower is different from centrifugal water pump, in design the blade of cfentrifugal blower be usually towards antecurvature, Blade exit laying angle is greater than 90 °, it is therefore intended that considers that dynamic lift will be big as far as possible and gesture lift wants smaller, i.e., Reaction coefficient will use up Amount is less than half, and the energy of air-flow is largely kinetic energy.If the air-flow of cfentrifugal blower output is because of front pipeline More than long flow path and bend and by residual water slug, then the kinetic energy of fan stream can aggravate due to the collision to residual water and tube wall And be largely converted into heat-energy losses and fall, therefore the residual water in pipeline is aspirated using water pump is installed additional in total discharge outlet, The push that can be conducive to fan stream is acted on to improve efficiency；Again since it is considered that the quantity of residual water is few, so prolonging When reasonable time after close the water pump of total water outlet when pipeline no longer blocks and channel be switched to the interface in straight-through pond. It is to cut off the import of water pump by always arranging that an interface, which is provided with, by the straight-through pond of normally open solenoid valve recycling hose The mouth of a river is connected to pond, and when water pump starting, normally open solenoid valve simultaneously operation closes the channel with pond, makes water pump specially to pipeline Suction.

The beneficial effects of the utility model are:

1, cfentrifugal blower is set in the total water inlet of cooling tower heat exchanger, it can be complete by the residual water in heat exchange pipeline Portion's discharge, pipeline is blocked when preventing freezed in winter bursting by freezing pipeline and avoiding being switched on again or half blocks and can not normal work Make；

2, water circulating pump and the air blower of draining need easy switching by production technology；

3, the valve of control loop water pump and air blower is parallel sliding gate valve, and flap can be automatically positioned valve seat, very The not high pipe cutting of suitable pressure, and it is suitable for electric operating；

4, the centrifugal water pump to draw water is switchably set at general export, can greatly improve air blower drainage efficiency；

5, all operationss electronic can all execute, convenient for automatically controlling.

Detailed description of the invention

Attached drawing 1 is an embodiment of the present invention structural schematic diagram；

Attached drawing 2 is the schematic top plan view of Fig. 1；

Attached drawing 3 is total drain structure for water schematic diagram of another embodiment.

In figure, cooling tower skeleton 1；Coil pipe 2；Import tee pipe coupling 3；First valve 4；Water inlet 5；Second valve 6；From Core type air blower 7；Total discharge outlet 8；Export tee pipe coupling 9；Normally open solenoid valve 10；Normally closed solenoid valve 11；Centrifugal water pump 12； Drainpipe 13.

Specific embodiment

Elaborate with reference to the accompanying drawing to the embodiments of the present invention: the present embodiment is with the utility model technology Implemented under premised on scheme, the detailed implementation method and specific operation process are given, but the protection of the utility model Range is not limited to the following embodiments.

Embodiment 1: as shown in Figure 1 and Figure 2, a kind of anti-freeze closed cooling tower, including cooling tower skeleton 1 and each by two groups The heat exchanger that four unit coil pipes, 2 array is constituted, the total water inlet of heat exchanger are connected with import tee pipe coupling 3, import tee tube Connector 3 has an interface to connect water inlet 5 by the first valve 4, and water inlet 5 connects the water outlet of water circulating pump, water circulating pump Water inlet be connected to pond；Another interface of import tee pipe coupling 3 connects a cfentrifugal blower by the second valve 6 7；Total discharge outlet 8 of heat exchanger connects pond using drainpipe 13.First valve 4 and the second valve 6 are all parallel sliding gate valve. The closure member of parallel sliding gate valve is the double disc that spreading mechanism is had between double disc, and spreading mechanism is often constituted with spring, bullet Spring opens two shoe brake plates and automatic attaching is on valve seat, and parallel sliding gate valve advantage is that flow resistance is small, flow resistance and short straight tube Flow resistance is similar, so that sealing surface is automatically positioned by means of spreading mechanism, such valve is applicable in electric drive, both economical and reliable, very It is suitable as stop valve.First valve 4 and the second valve 6 be all Electronic control, and the first valve 4 is opened and the second valve 6 The corresponding locking in pass, corresponding locking is opened with the second valve 6 in the pass of the first valve 4.After water circulating pump works, it is then switched off Water circulating pump and the first valve 4, then the second valve 6 is opened, starting cfentrifugal blower 7 will remain water row in the coil pipe 2 of heat exchanger Out.Arrow in figure indicates the direction of water flow or air-flow.

Embodiment 2: total discharge outlet 8 connects an outlet tee pipe coupling 9, and outlet tee pipe coupling 9 has an interface logical Crossing a normally open solenoid valve 10 recycles hose to lead directly to pond, and another interface passes through a normally closed solenoid valve 11 and a centrifugation The water inlet of formula water pump 12 connects, and the water outlet of centrifugal water pump 12 leads directly to pond by hose；Normally closed solenoid valve 11 it is open-minded Closing with normally open solenoid valve 10 is controlled by a delay switch, the starting of delay switch and the water circulating pump for being located at total water inlet Starting it is synchronous.When cfentrifugal blower 7 starts, delay switch is opened simultaneously to open normally closed solenoid valve 11 and close normally opened Solenoid valve 10, since it is considered that in pipeline remain water total quantity it is few, so after the reasonable time that is delayed when pipeline not Be delayed switch motion when blocking again, i.e., the centrifugal water pump 12 of total water outlet is out of service and channel is switched to straight-through pond Interface；It may also be noticed that a bit, centrifugal water pump 12 is wanted to work normally on startup and be generally required in pumping chamber i.e. spiral case Water is filled, since the centrifugal water pump 12 of the present apparatus is the lowest part for being connected to heat exchanger coils array, as long as so in coil pipe Have enough residual water, can recharge enter in the spiral case of centrifugal water pump 12, even if water shortage in coil pipe, centrifugal water pump 12 can also aspirate the air in coil pipe to reduce the resistance of cfentrifugal blower push residual water, referring to attached drawing 3.Remaining knot Structure is the same as embodiment 1.Although workload of the centrifugal water pump 12 during one-shot is not very much, since the present apparatus is long It phase and repeatedly uses, so its meaning is still very important.

The utility model can all discharge prevents freezed in winter bursting by freezing pipeline by the residual water in cooling tower heat exchange pipeline, The present apparatus has easy to operate, effect clear advantage.The basic principle of the utility model and main has been shown and described above The advantages of feature and the utility model.It should be understood by those skilled in the art that the utility model is not by the limit of above-described embodiment System, the description of the embodiments and the specification only illustrate the principle of the present utility model, is not departing from the spirit of the present invention Under the premise of range, the utility model also has various changes and improvements, these changes and improvements both fall within claimed In the scope of the utility model.The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. a kind of anti-freeze closed cooling tower, including the heat exchanger being made of several groups coil pipe unit array, characterized in that heat exchange The total water inlet of device is connected with import tee pipe coupling, and import tee pipe coupling has an interface to pass through the first valve connection circulation The water outlet of water pump, the water inlet of water circulating pump are connected to pond, another interface of import tee pipe coupling passes through the second valve Connect a cfentrifugal blower；Total discharge outlet of heat exchanger connects pond using pipeline.

2. a kind of anti-freeze closed cooling tower according to claim 1, characterized in that the first valve and the second valve are all Parallel sliding gate valve.

3. a kind of anti-freeze closed cooling tower according to claim 1, characterized in that the first valve and the second valve are all Electronic control, and the on or off interlocking corresponding with the off and on of the second valve of the first valve.

4. a kind of anti-freeze closed cooling tower according to claim 2, characterized in that total discharge outlet connects an outlet three Connection for bbreather pipe, outlet tee pipe coupling have an interface by the straight-through pond of normally open solenoid valve recycling hose, and another Interface is connect by a normally closed solenoid valve with the water inlet of a centrifugal water pump, and the water outlet of centrifugal water pump passes through hose Straight-through pond；The closing of normally closed solenoid valve opened with normally open solenoid valve is controlled by a delay switch, the starting of delay switch It is synchronous with the starting for the centrifugal water pump for being located at total water inlet.