KR20110011731A - Rupture proof device which uses continuous air pressure jet for self car wash - Google Patents

Abstract

PURPOSE: A device for preventing self-car washing equipment from freezing and bursting by continuously injecting compressed air is provided to effectively prevent a duct from freezing for a long time with reduced costs. CONSTITUTION: A device for preventing self-car washing equipment from freezing and bursting comprises high-pressure hose pipes(50), bubble hose pipes(60), and a controller(30). Air flowing from a compressed air source is supplied to the high-pressure and bubble hose pipes through an air passage. A manual opening and closing valve(10), a water separator(11), a pneumatic regulator(12), and a solenoid valve(20) are successively arranged in the air passage. The controller electrically controls the opening and closing of the solenoid valve depending on surrounding temperature.

Description

Upture proof device which uses continuous air pressure jet for self car wash}

The present invention is a freeze protection device of a self-cleaning facility by continuous injection of compressed air, not a one-time air blowing, minimizing winter maintenance costs and maintaining the car wash operation always possible during freeze protection operation. It relates to a maintenance device.

A device that prevents freezing of pipelines by continuously flowing a small amount of hot water or heating all the pipe paths by using heating wires is an exponential increase in the amount of hot water consumed and the amount of power consumed as the subsea weather lasts longer. The contrast effect is very poor.

On the other hand, there is a freeze protection device that uses a compressed air filling followed by blown air as a device that prevents freezing of the pipe at a relatively low cost.

Freeze protection, which uses air to drain water out of pipelines, is useful in pipe networks consisting of only one relatively large diameter pipe and where separate compressed air tanks or air compressors are provided. However, if the diameter of the pipeline is very small, or if there is a part of the pipe passing through the water, the method of sealing the entire pipeline after a simple blow is very inconvenient due to its low effectiveness and limited use. If the pipeline is left as it is, external moisture gradually flows in and freezes again. In addition, having a separate source of compressed air for the purpose of only draining water is also poor in terms of economics, similar to hot water or heating lines.

Fire-fighting device exclusively for fire extinguishing by air pressure in a closed pipe passage Self-cleaning air spraying device using compressed air injection No. 10-2006-0039539

20-1999-0014699 (Korean Utility Model Publication No. 20-1999-0014699) A washing hose freeze protection device using compressed air in a vehicle air tank. Freeze Blocking System of Fire Fighting Vehicle Piping Using Compressed Air in Air Tank.

Most of the patent documents introduced above have a one-time freeze protection operation of removing water from a pipe by a single air spray action. However, as mentioned, this is only useful if the pipeline is a single pipe, if the pipe diameter is relatively large, or if the outlet can be blocked to prevent compressed air from leaking. Winter weather has the disadvantage of easily freezing again.

In addition, when the vacated pipeline has a large diameter and high water pressure, water should be slowly filled to prevent damage to the pipeline by water hammering. Therefore, in order to apply such freeze protection device to a multi-pipe hybrid piping system that has many thin pipes that do not have a separate seal, such as self-cleaning facilities, and which must be operated frequently in sub-zero weather, the following complex requirements must be met: do.

First, the gun gun handle must be modified or the gun itself must be disconnected to prevent leakage of charged compressed air. In addition, once the pipe is completely empty, the air seal must be released and water should be filled only in certain pipelines to avoid unused ones. This process is very complicated, difficult to reuse, and unmanned, which makes it difficult to actively use in places such as a typical coin-operated self-washing car.

Meanwhile, similar to the present invention of the above-mentioned documents, in the case of the freeze protection device that does not block the exit of the pipe as it is discharged to the outside from the open pipe as it is, and does not place any restrictions on the compressed air to empty the pipe, air blowing Immediately after the bet is over, the inside of the pipeline is temporarily emptied, but compressed air containing moisture inside the pipeline itself creates numerous clogged tubers (microscopic pieces of ice), and eventually the ice inside the pipeline is caused by external moisture continuously flowing from the pipeline outlet. The droplets grow gradually, and after a certain time, the inside of the tube eventually fills up with ice again. Therefore, it does not work well for long time freeze protection or very cold and humid cold weather.

The present invention needs to be able to be used immediately without a separate operation even when it is difficult to completely seal the entire pipe network as described above, or during freezing prevention, or to prevent freezing for a relatively long time under conditions exposed to external moisture. In a facility such as a self-cleaning car that needs to be installed, freezing of open pipelines at a fraction of the energy cost of heating or hot water consumption by continuously flowing compressed air, which is partially heated or insulated, to suppress the growth of condensation tuberculosis. It can be effectively prevented for a long time.

In order to achieve the above object, the present invention first focused on the installation environment of a self-cleaning facility that must always have compressed air available.

Self-cleaning facilities always require compressed air to operate the foam hose and the dust-removing air gun to flush the foam. Therefore, an air compressor and an air tank for storing compressed air are necessarily installed, and the air compressor is periodically operated to drain water for removing water in the air tank or to replenish the consumer's paid air usage. In other words, a small amount of continuous air leakage during the winter does not significantly affect the total operating time and power consumption of the air compressor. Therefore, in the present invention, a separate air supply pipe 40 is additionally installed between the tank and the hose pipe so as to continuously leak a small amount of air from the compressed air source and flow it to the foam hose and the high pressure hose. The controller 30 interlocked with the external temperature sensor and the electric control solenoid valve 20 can be continuously connected to the controller to continuously flow only a small amount of air per hour. At this time, when the solenoid valve 20 is kept in a constant fine open state for freezing for a certain time (for example, several hours to tens of hours at night), it is compressed by the pneumatic regulator 12 which makes the discharged air pressure constant. The air supply (= compressor, etc.) is not operated continuously but is operated shortly and periodically. This can overlap with its own periodic driving timing. Therefore, it goes without saying that the hourly energy cost required by the compressed air source to compensate for the amount of air consumed is significantly less than the cost of hot water consumption for the same time or the energy required to operate the heating wires installed throughout the wash water piping.

Next, the present invention further arranges the water separator 11 between the manual open / close valve 10 installed in the air supply pipe and the pneumatic regulator 12 for adjusting the pressure, and includes an air supply path (bubble hose pipe or high pressure hose pipe path). By selectively arranging the heat treatment section 41 and the air heater 42 in a specific temperature drop zone, for example, a zone where it is connected to an external metal frame and greatly loses heat, such as a rotary boom, which is an exposed metal tube. When excessively cooled humid air is discharged from the high pressure hose nozzle outlet, the pressure decreases, and the water around the pre-clean nozzle is frozen to prevent the nozzle outlet. This is a typical small compressor installed in a self-cleaning facility. The water is not removed properly during the air compression process, and the compressed air stored in the tank contains quite a lot of moisture even after periodic draining. Many cases of tuberculosis (freeze tuberculosis) occur, and even if air with much water is removed, the temperature is too low even before the pressure drop (= temperature drop) at the nozzle outlet. Considered configuration.

In addition, the present invention pays attention to the fact that the operating pressure and the water supply characteristics of the pipe exposed to freezing hazards, such as foam hose and high pressure hose, are different. The foam hose side of the car wash water supply line has a feature that a small amount of water and detergent foam are ejected together with low pressure air (low water pressure in the pipeline), and the high pressure hose line is sprayed with only high pressure water without air. (High water pressure in the pipeline). For this reason, the low pressure foam hose piping side usually has a small amount of leakage, so the freeze protection air may be supplied at a low pressure relatively intermittently, and there is little risk that the bubble water flows back into the air supply pipe even during an unexpected bubble hose operation. On the other hand, the high pressure hose pipe side has a lot of residual water and leakage in the pipeline, and in case of sudden operation, the high pressure water flows back to the air supply pipe, so it is necessary to provide a constant flow rate and compressed air above a certain pressure. .

In the present invention, the air supply pipe 40 connected to the foam hose pipe 60 in consideration of the operation pressure difference and the residual quantity difference for each pipe line, the solenoid valve 20, followed by a check valve 21, air flow control valve ( 22) are placed in order to reduce the air consumption rather than to prevent the risk of backflow.In the order of the high pressure hose pipe 50, the solenoid valve is followed by the air flow control valve 22 and the check valve 21. The high pressure water was first prevented, and then the air flow control valve was individually controlled to allocate more air flow than the foam hose line, focusing on the continued removal of residual moisture.

According to the present invention, the self-car wash pipe network, which is virtually impossible to seal, can be controlled on the air discharge path by appropriately controlling the absolute humidity and temperature of the compressed air supplied while continuously supplying the compressed air to empty the pipeline with little power. A drop in temperature or pressure in the zone may prevent rapid freezing of residual moisture or air itself in the pipeline. Therefore, the air can be effectively prevented for a long time only with air, which guarantees a low energy cost.

In addition, due to the characteristics of convenient air, even when the freeze protection function is in operation, if a specific pipe starts supplying water, the freeze protection operation may be automatically suspended without the occurrence of backflow into the air supply pipe. Therefore, there is no additional operation burden on the consumer using the self-cleaning facility, and there is a very convenient effect.

In addition, the freeze protection device of the present invention does not continuously blow an excessive amount of air to empty the pipeline completely for a long time, but an optimal amount of air that adequately secures only an empty space that does not freeze in accordance with the total length of the individual pipeline and the resistance of the individual pipeline. Control is possible. Therefore, there is almost no harmful water hammer when supplying sudden washing water, which does not affect the service life of the pipe. Compared with other air-tight freeze protection devices, there is relatively little empty space in the pipeline, so the water supply reaction is immediate. There is an additional effect that does not cause inconvenience.

1 is a main portion of the piping showing the state before the operation of the invention freeze protection device
Figure 2 is a main portion of the piping showing the state of the invention freeze protection device in operation
Figure 3 is an overall piping diagram of the freeze protection device of the present invention with one solenoid valve installed
Figure 4 is an overall piping diagram of the freeze protection device of the present invention installed a plurality of solenoid valves
Figure 5 is a cross-sectional view showing the structural features of the subcooling layer in the pipeline freeze protection by the present invention.

With reference to the embodiment of the present invention included in the drawings in order to technically support the above-described solution of the present invention will be described in detail.

However, below, the components including the specific terminology and combinations thereof do not limit the technical spirit inherent in the present invention.

1 is a piping diagram showing a simple embodiment of two piping of one high-pressure hose and one foam hose as showing only the core portion of the freeze protection device of the present invention. In addition, Figure 1 shows the case that is not the winter season, the manual shut-off valve 10 is not in operation is stopped.

FIG. 2 illustrates a state in which the solenoid valve 20 is open (operated) in the operating standby state of the manual open / close valve 10 in FIG. 1. The red part is the active part to prevent freezing on the air supply pipe 40 installed between the compressed air source and the high pressure hose and the foam hose, such as the high pressure hose and the foam hose, and the bubble hose or the high pressure hose from the compressed air source. It is described as follows according to the arrangement order up to the pipe.

Manual control valve (10) for main control,

Moisture separators (11) contained in compressed air

A pneumatic regulator 12 which stabilizes the pressure of a compressed air source (which may be a tank or compressor direct connection),

The solenoid valve 20 which is controlled by the controller 30 and supplies or blocks the compressed air,

Next, the check valve 21 for preventing the flow back and the flow rate control valve 22 for adjusting the air volume are installed in the foam hose pipe 50 side of the car wash water pipes 50 and 60 in order, and the air in the high pressure hose pipe 60 side. An air flow rate control valve 22 for adjusting the discharge amount and a check valve 21 for preventing backflow are provided in this order.

On the other hand, after the air-water confluence point joining the air supply pipe 40 (directly exiting the insulated machine room area indicated by dotted lines in Figs. 1 and 2), the insulation or heat insulation during the section before reaching the foam brush or car wash gun In the temperature drop zone that requires treatment, the heat treatment unit 41 and the air heater 42 for heating the air supplied through the air supply pipe 40 may be further disposed so that the pipe does not excessively lose heat to the outside.

The freeze protection piping configuration of the present invention disposed in the above order will be described in more detail below.

Manual opening and closing valve 10 is a manual operation device that can turn on / off the entire freeze protection system. It can be operated to open only in winter, especially in cold weather, to prevent unnecessary operation.

The water separator 11 can be easily installed and used as a ready-made product in which a vortex generation method and a method using a filtration filter are induced to induce discharge after the first condensation according to the conventional air diffusion.

The pneumatic regulator 12 serves to maintain a constant level by appropriately reducing the pressure of the air delivered from the compressed air source. Normally, the pressure of commercial air compressors ranges from 0.3 to 0.8 MPa, approximately 3 to 8 kgf / ㎠, and the pressure of air passing through the car wash water pipe exposed to atmospheric pressure is about 0.06 to 0.1 MPa (1 kgf / ㎠). Therefore, it is a device that delivers air at a constant pressure until the next compressor operation even if the tank which depressurizes to this pressure level and continuously consumes air causes a pressure change.

If the air tank capacity is too small or the air compressor's operating / stopping range is set too wide, the role of the pneumatic regulator becomes very important and it is necessary to install a high performance regulator.

The solenoid valve 20 is a device that can electrically open and close the valve using a solenoid which is a conventional electromagnet driving body. In accordance with the electric signal of the controller 30, the electric valve or the air control valve that can continuously flow only a small amount of air as needed per hour, or the limit operation of the degree to seal the compressed air slightly reduced in the pneumatic regulator 12 It must have a pressure and low power consumption in continuous opening (valve open).

In addition, the solenoid valve 20 and the air heater 42 are controlled by a command of the controller 30 operating based on the data of the external temperature sensor 31 separately installed. For example, the operation pattern of the controller 30 operates the solenoid valve when the outside air temperature falls below the set temperature (for example, minus 0 to 5 degrees), and further operates the air heater provided in the temperature drop section when the temperature drops further. It can be set as default and can have more complicated control pattern additionally by duration after temperature drop and external humidity. In any case, it can be easily implemented with a simple micom circuit. Here, the controller 30 may control the air flow control valve 22 described below. However, in consideration of cost-effectiveness, the air flow control is manually performed. Instead, the controller 30 mainly controls the opening amount and the opening duration of the solenoid valve. When combined with air flow control that finely adjusts the air volume according to the characteristics of individual pipes, it shows the effect of continuous injection. This combination is also a key part of the present invention that differentiates it from the prior art.

When the flow rate control amount of the air flow control valve 22 is a manual type, it is a method of adjusting by turning a screw by hand, and can be finely adjusted according to the inherent pipeline resistance of each installation position car wash water pipe, and the check valve 21 The number of installations can be adjusted according to the pipeline pressure of car wash water piping at the installation position. For example, one check valve per pipe is installed in the high pressure and high pressure hose pipe, and a check valve is installed in the low pressure foam hose pipe to integrate a plurality of pipes into one to minimize the number of valves.

At this time, the effort of disposing the air flow control valve at the distal end means that the flow control function can be maximized so that the air volume is optimally injected according to the pipe resistance of each pipe. In addition, it also has the advantage of saving the number of check valves on the foam hose pipe side as shown in Figure 4 below.

3 and 4 is an overall piping diagram showing an expanded embodiment of the freeze protection device of the present invention. 3 is a method of operating and stopping at once by installing one solenoid valve and Figure 4 is a way to maintain the freeze protection operation even during use except for the specific pipe in use by installing each solenoid valve in each pipe to be. As shown in FIG. 4, one high-pressure hose is in use and the other pipe is continuously maintained without stopping the freezing air supply. (Main operation part is marked in red.)

In Figure 3, since the manual opening and closing valve is open, the manager of the car wash facility can leave without additional action. On the other hand, the blue part in the drawing is the pipe part which is currently filled with car wash water. This part can be changed according to the number of installation and the installation position of the pump, but in this embodiment, four foam hose pipes and high pressure hose pipes are each set to share the water supply by one pump.

Meanwhile, the section after the confluence of the air supply pipe 40 and the car wash water pipe is a full-fledged freezing section that is not kept warm. The heat treatment unit 41 and the air heater 42 are selectively disposed in a specific temperature drop zone in the air supply path of the freeze section, which is the compressed air from the air supply pipe 40 to the car wash water pipes 50 and 60. This is to prevent excessive freezing through condensation and then passing through an external cold pipe, causing the pressure to drop rapidly during final external release.

Compressed air in an air tank compressed by inhaling cold and humid outside air contains a lot of moisture and is always at risk of freezing if there is no periodic draining. Even if such compressed air is removed from the water separator in the primary water separator, there is a risk of excessive cooling when passing through a pipeline such as the rotary boom shown in FIGS. 3 and 4. In particular, the rotary boom is a flow channel combined with a bobbin and a sleeve, and has a certain degree of leakage prevention, but it is not a structure that can completely seal air. Therefore, a small amount of moisture penetration always occurs, and in most self-cleaning facilities, the rotary boom is installed on the car wash ceiling and the metal frame supporting it is directly welded to the rotary boom body. This structure is a typical heat transfer structure that allows heat to be taken away extremely quickly. If left in place, the air passing through the rotary boom cools very cold with a slight moisture addition, even at high pressure.

Then, when suddenly diffused at high pressure, such as the nozzle outlet of the high-pressure car wash gun, rapid condensation of the moisture contained by the adiabatic expansion occurs and the condensed water is frozen as it is to block the car wash nozzle, and consequently through the air supply pipe 40 The continuous supply of compressed air is immediately stopped. In order to eliminate this phenomenon, a certain temperature abatement zone, that is, a rotary boom zone, is thermally insulated in a structure that does not lose heat to the outer frame, and the thermally insulated portion is heated with a heater coil to prevent the zone from being left at an excessively low temperature. There is a need. Of course, since the heat insulation section and the air heating section are very short compared to the total length of the external pipe outside the normal self-cleaning, even if the heat transfer in this section is less energy costs than comparable to the heat transfer to the entire external pipe.

In FIG. 4, the air heated by the air heater is supplied from the air supply pipe 40 to the car wash water pipe by the operation of the solenoid valve 20. At this time, water may be supplied to some pipes. FIG. 4 is a further embodiment showing that the solenoid valve 20 is closed only in part of a pipeline in use unlike FIG. 3, so that the remaining pipe can still maintain freezing air supply and some section air heating. In this case, the installation cost is a little expensive, but more reliable freeze protection can be achieved.

The air discharged through the above process is branched and supplied to the foam hose pipe 60 and the high pressure hose pipe 50, respectively, and further passes through the check valve 21 for preventing the flow back and the flow control valve 22 for adjusting the air volume. At this time, the installation order of the check valve and the flow control valve can be appropriately adjusted as follows.

For example, the high pressure hose pipe 50 filled with the high pressure high pressure water passes through the flow control valve 22 first, and then air is discharged through the check valve 21 so as to discharge the high pressure toward the flow control valve 22. Do not allow backwash water from backwashing.

On the other hand, the foam hose pipe 60 filled with the foam water in the low pressure state may pass through the check valve 21 first and then discharge the air through the flow control valve 22. The focus is on savings.

Figure 5 shows the cross-sectional structure of the freeze-proof pipe line according to the present invention shows that the thickness of the supercooling layer 70 in the water and ice mixed state is different according to the respective pipe characteristics.

For example, the high-pressure hose pipe 50 having a relatively high amount of residual water and a high pressure state has a small amount of high-pressure air which is highly prevented from backflow, but flows continuously and has a relatively narrow hole. (The supercooling layer is relatively thick but uniform. On the other hand, the foam hose pipe 60, which has a relatively low amount of residual water and has a low pressure, has a relatively wide hole irregularly flowing with low pressure air with less backflow prevention. (The supercooling layer is relatively thin but irregular.) As such, by adjusting the adjustment amount of the flow control valve 22 and the connection point of the check valve 21 according to the characteristics of the corresponding pipe line or the length of the specific pipe line, the amount of air consumed per hour is achieved while maintaining the same freezing effect. This can be adjusted to a minimum, which leads to a reduction in the number of compressor runs, ie lower maintenance costs.

While the embodiments of the present invention have been described in detail with reference to the drawings, the technical spirit of the present invention is not limited to the above embodiments.

In other words, those of ordinary skill in the art to which the present invention pertains may utilize the technical spirit contained in the specification and drawings of the present invention, and as necessary, change and simplicity which are not included in the specification and drawings of the present invention. Although an extension example may be implemented, this is also clearly included in the scope of the technical spirit represented by the following claims.

The present invention has the advantage that it can be easily retrofitted and the cost of installation is very low since only one pneumatic pipe and a short section of insulation insulation are additionally installed at the time of initial installation as well as the already installed self-cleaning facility.

In addition, the present invention describes only a freeze protection device for a self-cleaning facility, but in order to continuously blow out small amounts of compressed air, the resistance of the pipe (including the supercooled layer) is appropriate and the internal pressure of the pipe that is finished is compressed. Appropriate conditions that can be drilled only with air can be easily applied to any field device.

10: manual open / close valve
11: water separator
12: pneumatic regulator (decompression ballast)
20: Solenoid valve (for air supply)
21: (return check) check valve
22: air flow control valve
30: controller
31: temperature sensor
40: air supply piping
41: heat insulation unit (or heat insulation unit)
42: air heater (heater)
50: High pressure hose piping (during car wash water piping)
60: Bubble hose piping (during washing water piping)
70: supercooled layer (water + ice)

Claims (4)

Supply air from the compressed air source to the high pressure hose pipe (50) or the bubble hose pipe (60), but on the air supply path, a manual open / close valve (10), a water separator (11), a pneumatic regulator (12) and a solenoid valve (20). Air supply pipe 40 and characterized in that arranged sequentially from the supply source to the pipe,
It comprises a controller 30 for electrically controlling the opening and closing operation of the solenoid valve 20 according to the ambient temperature,
When the ambient temperature is less than the set value, the controller 30 controls the solenoid valve 20 to the open state, characterized in that the freeze protection device of the self-cleaning facility. The method of claim 1,
Of the air supply pipe 40, a pipe portion for supplying air to the high pressure hose pipe 50, the air flow control valve 22, the check valve 21 is further arranged in sequence after the solenoid valve 20 Freeze protection device of a self-cleaning facility characterized in that the high pressure hose pipe 50 is connected to. The method of claim 1,
Of the air supply pipe 40, the pipe portion for supplying air to the foam hose pipe 60, the solenoid valve 20, the check valve 21, the air flow control valve 22 is further arranged sequentially Freeze protection device of a self-cleaning facility, characterized in that the connection to the foam hose pipe (60). The method according to claim 2 or 3,
The air heater 42 which is operated by the control of the heat insulation unit 41 and the controller 30 in the area where the rotary boom is disposed among the high pressure hose pipe 50 or the bubble hose pipe 60. Freeze protection device of the self-cleaning facility, characterized in that is further installed.

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