JP5810393B1 - Simultaneous metering device for drainage and wasteful compressed air discharge - Google Patents

Abstract

A drain amount and a compressed air amount connected to an orifice provided at a drain discharge port of an intercooler, an aftercooler, or a refrigeration air dryer connected to an air compressor, or a valve that is halfway open. An apparatus for weighing is provided. A steam / water separator comprising a centrifugal separator for separating and removing drains in compressed air, and a flow meter that is connected to a subsequent stage of the steam / water separator and that can measure an integrated flow rate of compressed air discharge. The drain amount and the waste compressed air discharge amount are simultaneously measured in a state where the drain amount and the compressed air amount discharged from the drain discharge port 4f are limited. [Selection] Figure 1

Description

  The present invention relates to a device connected to a compressed pneumatic circuit by compressed air discharged from an air compressor and simultaneously measures a drain amount and a waste compressed air discharge amount.

  The air compressor generates drain as condensed water in the process of compressing the atmosphere and producing compressed air. The drain may be harmful to the application, for example, when a device connected to the compressed air circuit fails or is discharged from the end of the circuit. Therefore, a device connected to the compressed air circuit is provided with a drain outlet for discharging the drain.

  Further, the drain discharge port is generally provided with a drain trap, and the drain is generally discharged appropriately by opening the valve by some valve opening command.

  However, in a compressed air circuit having an ultra-large air compressor with an output of approximately 250 kW or more and a large air compressor having a power of 90 kW or more, there are many devices connected to the circuit, and the compression provided to each device. Due to the large amount of air, the damage caused by the failure of the drain trap is enormous.

  Therefore, the drain trap is not connected to the drain outlet of the intercooler or aftercooler or refrigeration air dryer connected to the ultra-large air compressor or large air compressor that generates a large amount of drain. Generally, the drain is discharged together with the compressed air by connecting a half-open valve.

  However, when the above configuration is adopted, when the amount of drain generated is reduced when the atmosphere is dry and at a low temperature in winter or the like, only compressed air is discharged from the drain outlet.

  As an example, in the case of 0.69 MPa compressed air, a theoretically wasteful compressed air of approximately 1.16 sq.m / min is discharged from a 4 mm orifice.

  Therefore, in the case of adopting the above-mentioned configuration, it is impossible to grasp how much wasteful compressed air flow exists, so the consumption flow of the entire circuit may exceed the allowable level, and therefore the pressure drop at the end There was a possibility that happened.

  In addition, measuring the amount of drain that is actually generated from the equipment can be done when selecting an oil / water separator that separates and removes oil / water from the drain connected to the compression / pneumatic circuit, and for drain pits for storing drain. It is extremely important when determining capacity.

  Therefore, the applicant tried to measure the flow rate by connecting a flow meter to the latter stage of the orifice or the valve in the halfway open state, as shown in the technical proposal according to Patent Document 1. It came to discover the subject of.

  Further, the applicant tried to measure the amount of drain by connecting a pail can having the same pressure as the atmosphere to the drain outlet, but the second problem described later has been discovered.

  Furthermore, although the applicant performed measurement twice to discover the first problem and the second problem, the applicant has discovered a third problem described later.

  As the first problem, the flow meter which is the technical proposal according to Patent Document 1 is not only capable of measuring accurately due to a mixture of drainage or foreign matter mixed in the drain including oil and sludge. There were problems with accuracy and reliability, such as the possibility of failure.

  As said 2nd subject, the flowmeter which is a technical proposal which concerns on patent document 1 cannot measure the drain amount and the discharge | release amount of useless compressed air simultaneously. Therefore, the amount of drainage and wasteful compressed air that change every moment according to conditions such as temperature and humidity, circuit pulse pressure and operating conditions, and load / unload of the air compressor are measured at different times. In order to match the environment and conditions at the time of weighing both, it is necessary to separately perform a conversion calculation, and there is a problem in convenience and accuracy such that it is only a pseudo one.

  As the third problem, the method that led to the discovery of the first and second problems requires separate measurement of the drain amount and the waste compressed air amount, which is troublesome twice and is convenient. There was a problem.

JP-A-10-82676

  The “simultaneous metering device for drain amount and wasteful compressed air discharge amount” according to the present invention is a device for metering the drain amount and wasteful compressed air amount in the compressed air circuit in view of the first to third problems. The objective is to improve the functionality of the system.

In order to solve the above-mentioned problems, the “simultaneous metering device for drain amount and useless compressed air discharge amount” according to the present invention is a drain device for either an intercooler, an aftercooler, or a refrigeration air dryer connected to an air compressor. A drain amount and compressed air amount measuring device connected to an orifice provided at an outlet or a halfway open valve, for separating and removing the drain in the compressed air, the inlet, the inlet A steam / water separation means comprising a deflector for generating a swirling flow with the compressed air introduced more downward and a centrifugal separator having an outlet located horizontally facing the inlet, and a downstream of the steam / water separator. And a flow rate measuring means for measuring the integrated flow rate of the compressed air discharge amount, wherein the drain amount and the compressed air amount discharged from the drain discharge port are limited. In state, adopting the configuration in which the weighing of the amount of drainage and waste compressed air emissions at the same time.

  The “simultaneous metering device for drain amount and useless compressed air discharge amount” according to the present invention has, as a first effect, a drain discharge port of an intercooler, an aftercooler, or a refrigeration air dryer connected to an air compressor. Drain amount and compressed air release after separating foreign substances such as drain and sludge by air-water separation means from compressed air mixed with drain discharged from the provided orifice or halfway open valve Since the integrated flow rate of the amount is measured, the device has the excellent effect of improving the accuracy and reliability of the device, which was the first problem.

  The “simultaneous metering device for drain amount and wasteful compressed air discharge” according to the present invention can measure the drain amount and wasteful compressed air discharge amount “simultaneously” under the same weighing conditions as the second effect. Since there is no need to separately perform a conversion calculation and the measurement result is a confirmed actual measurement, it has the excellent effect of contributing to the convenience and accuracy that were the second problem. is there.

  The “simultaneous metering device for drain amount and wasteful compressed air discharge amount” according to the present invention can measure the drain amount and wasteful compressed air release amount at the same time as a third effect, thereby improving convenience. This is an excellent effect.

It is a connection system diagram of the simultaneous metering device of the amount of drain and the amount of useless compressed air discharge of the present invention. It is a connection system diagram of the air compressor to which the simultaneous metering device for the drain amount and the wasteful compressed air discharge amount of the present invention is connected. It is a connection system diagram of the whole pneumatic circuit to which the simultaneous metering device for the drain amount and wasteful compressed air discharge amount of the present invention is connected.

The simultaneous metering device 1 for the amount of drain and the amount of wasted compressed air discharge according to the present invention includes a drain discharge port (4f, 5b) of either the intercooler 4c or the aftercooler 4e or the refrigeration air dryer 5 connected to the air compressor 4. ) to a metering device of the drain amount and amount of compressed air is connected to the valve 8 of the orifice or halfway open state provided, the drain in the compressed air in addition to separate and remove the inlet 2b, the A steam / water separation means 2 comprising a deflector 2d for generating a swirling flow by directing compressed air that has entered from the inlet 2b downward, and a centrifuge having an outlet 2c positioned horizontally facing the inlet, and the air A flow rate measuring unit 3 connected to a subsequent stage of the water separation unit 2 and capable of measuring an integrated flow rate of the compressed air discharge amount, and discharged from the drain discharge ports (4f, 5b). In a state where the amount of drainage and compressed air amount is limited, the maximum feature to carry out metering of the amount of drainage and waste compressed air emissions at the same time.
Hereinafter, the details of the simultaneous metering device 1 for the drain amount and the wasteful compressed air discharge amount according to the present invention will be described based on the drawings.

  In addition, it cannot be overemphasized that a material, a shape, a dimension, etc. can be suitably changed within the range of a technical idea among each structure described below.

  First, the configuration of a compressed pneumatic circuit provided with the present invention will be described. 2 and 3 show connection system diagrams relating to the simultaneous metering device 1 for drain amount and useless compressed air discharge amount according to the present invention, FIG. 2 is a connection system diagram of an air compressor, and FIG. 3 is a pneumatic circuit. It is the whole connection system diagram.

  The air compressor 4 sucks air from the air intake and compresses it to produce compressed air. The compressed air compressed in the air compressor 4 passes through the pipes in the circuit, and in the process, is dehumidified by the refrigeration air dryer 5, stored in the air tank 6, and supplied to various devices 7 at the end. .

  Here, the air compressor 4 includes a plurality of compression means (4b, 4d) in an ultra-large air compressor having an output of approximately 250 kW or more, a large air compressor having 90 kW or more, and the like. The air heated by the first compression means is primarily cooled by the intercooler 4c and improves the compression efficiency of the second compression means 4d. The air further compressed by the second compression means 4d is precooled by the aftercooler 4e in the compression process, and the cooling efficiency of the refrigeration air dryer 5 at the subsequent stage is improved.

  The intercooler 4c and aftercooler 4e, the refrigeration air dryer 5, the air tank 6 and the device 7 of the air compressor 4 are provided with drain discharge ports (4f, 5b, 6b, 7b) for discharging the drain generated at the relevant locations. Is provided.

  By the way, the drain often contains a lot of oil, and the drain discharged from the drain discharge ports (4f, 5b, 6b, 7b) finally passes through the oil / water separator 11 to remove the oil. Separated and removed and discharged out of the circuit.

  Here, in the compressed air circuit to which the air compressor 4 in the large air compressor having an output of approximately 90 kW or more and the super large air compressor is connected, either the intercooler 4b, the after cooler 4e, or the refrigeration air dryer 5 is used. The drain discharge port (4f, 5b) is provided with an orifice or a valve 8 that is halfway open, and the drain is discharged together with wasted compressed air in a state where the flow rate of the compressed air is limited. The discharged drain is drain pit. A configuration in which the oil is temporarily stored in 10 and then pumped up by a pump or the like and sent to the oil / water separator 11 is common.

  Further, here, the drain generated in the air tank 6 or the device 7 is connected to the drain discharge port (6b, 7b) with a drain trap 9 as a drain discharge valve, and piped toward the oil / water separator 11 by some valve opening command. A configuration in which pressure is fed through is common.

  Next, the configuration of the simultaneous metering device 1 for the drain amount and wasteful compressed air discharge amount according to the present invention will be described. FIG. 1 is a connection system diagram of a simultaneous metering device 1 for drain amount and useless compressed air discharge amount according to the present invention.

  In a compressed air circuit to which an air compressor 4 in a large air compressor having an output of approximately 90 kW or more and a super large air compressor is connected, a drain discharge port of either the intercooler 4b, the aftercooler 4e, or the refrigeration air dryer 5 (4f, 5b) is generally provided with an orifice or a halfway valve 8 and the drain is discharged and discharged together with wasted compressed air in a state where the flow rate of the compressed air is limited.

  As a main configuration of the simultaneous metering device 1 for the drain amount and the wasteful compressed air discharge amount, the steam / water separation means 2 including a centrifuge for separating and removing drain in the compressed air, and the steam / water separation means 2 are provided. And a flow rate metering unit 3 connected to the latter stage and capable of measuring the integrated flow rate of the compressed air discharge amount, and the intercooler 4b or the after cooler 4e to which the air compressor 4 is connected or a refrigeration type It is connected to the orifice provided in any drain outlet (4f, 5b) of the air dryer 5 or the valve 8 in the halfway open state. Then, it functions as a device that simultaneously measures the drain amount and the waste compressed air discharge amount in a state where the drain amount and the compressed air amount discharged from the drain discharge port are limited.

  The steam / water separation means 2 is connected to the downstream of the orifice 8 provided in the drain outlet (4f, 5b) of the intercooler 4b or the aftercooler 4e or the refrigeration air dryer 5 or the halfway open valve 8. Inflow port 2b, outflow port 2c, deflector 2d, and drain discharge port 2e are provided.

  The steam-water separating means 2 allows wasteful compressed air and drain to flow in from the inlet 2b, generates a swirling flow in the wasteful compressed air by the deflector 2d, and removes foreign matter such as drain or sludge or oil droplets by the principle of centrifugal separation. They are separated and removed, and they are stored inside, and wasteful compressed air is sent from the outlet 2c to the flow rate measuring means 3 at the subsequent stage. The accumulated drain can be easily metered by opening a valve connected to the drain outlet 2e at the end of the test.

  The first purpose of providing the steam-water separation means 2 is that the intercooler 4b or the aftercooler 4e or the refrigeration air dryer 5 is provided with an orifice provided at any drain outlet (4f, 5b) or a halfway valve open state. This is because the flow rate measuring means 3 measures the flow rate of wasted compressed air after separating and removing foreign matter such as drain, oil and sludge present in the wasted compressed air discharged from the valve 8.

  The second purpose of providing the steam-water separation means 2 is to separate the drain and the waste compressed air in the same device because there are problems described later in measuring the drain amount and the waste compressed air at different times. This is to measure both at the same time.

  For example, the volume flow rate of compressed air and drain increases as their temperature increases. Wasted compressed air and drain discharged from the drain discharge ports (4f, 5b) have substantially the same temperature. However, if the time for metering changes, the temperature of the drain and useless compressed air and other conditions may change, so calculations that convert both to pseudo conditions are performed. Otherwise, there will be a problem that the amount released under the same conditions cannot be measured.

  The third purpose of providing the steam-water separating means 2 is that it is originally useless to measure the drain and useless compressed air at different times, and after separating the drain and useless compressed air in the same device, This is because it is possible to omit the weighing action for one time as compared with weighing at different times.

Centrifuge constituting the steam-water separating means 2, Ri separator der capable of separating steam on the principle of centrifugal separation, if a mode that generally shown in Figure 1, particularly limited details of the specific structure However, it is more preferable to provide a structure capable of storing a certain amount of drain in the main body.

  When a so-called air filter having a filter element such as paper, resin, or activated carbon that does not depend on the principle of centrifugal separation is adopted as the air / water separation means 2, pressure loss is large or drainage is caused by the filter element. Since there is a possibility that the wasteful compressed air amount and the drain amount may not be correctly measured due to adhering to the surface, it should not be employed for the purpose of the present invention.

  Furthermore, since the centrifuge constituting the air / water separation means 2 can separate the air / water on the principle of centrifugal separation, the pressure loss is generally about 1/10 or less compared to the air filter. There is also no problem with the adhesion of drain. In addition, separators capable of separating air and water by the principle of centrifugal separation generally have a separation efficiency of 98% or more with respect to the separation efficiency of foreign substances such as sludge and oil droplets. It can be removed.

  The flow rate measuring means 3 is connected to the subsequent stage of the steam-water separating means 2 and is provided for the purpose of measuring the accumulated flow rate of useless compressed air.

  Here, the flow rate measuring means 3 can measure how much the accumulated flow rate exists, and the specific structure is not particularly limited as long as the target fluid is for compressed air.

  Next, the operation of the simultaneous metering device 1 for the drain amount and the wasteful compressed air discharge amount according to the present invention will be described.

  The simultaneous metering device 1 for drainage and wasteful compressed air discharge according to the present invention is provided in the drain outlet (4f, 5b) of the intercooler 4c or the aftercooler 4e connected to the air compressor 4 or the refrigeration air dryer 5. Connected to the orifice 8 or the valve 8 in the halfway open state.

  The orifice or the valve 8 in the halfway open state discharges drain and useless compressed air in a state where the flow rate of useless compressed air is limited.

  The drain and waste compressed air that has passed through the orifice or the valve 8 that is halfway open first flows into the steam / water separation means 2. The air / water separation means 2 separates and removes foreign matter such as sludge and oil droplets, and the drain is stored in the air / water separation means 2, and the drain and foreign matter are separated and removed. The compressed air is sent to the flow rate measuring means 3.

  The flow rate measuring means 3 integrates and measures the amount of wasted compressed air released from which drainage and foreign matter have been separated and removed by passing through the air / water separation means 2.

  Here, for example, when it is desired to measure the drain amount per minute and the amount of wasted compressed air, after one minute after the start of the metering, the orifice or the valve 8 that is halfway open is closed, and then What is necessary is just to measure the accumulated flow rate of compressed air indicated by the flow rate measuring unit 3 while measuring the drain amount stored in the water separating unit 2.

  As described in “Effects of the Invention”, the “simultaneous metering device for drain amount and wasteful compressed air discharge amount” according to the present invention has many excellent effects and is an intercooler connected to an air compressor. Alternatively, it can be used in many situations as a drainage and compressed air metering device connected to an orifice provided at the drain outlet of either an aftercooler or a refrigeration air dryer or a valve that is halfway open. is there. Therefore, it is considered that the industrial applicability of the present invention is great.

DESCRIPTION OF SYMBOLS 1 Simultaneous measuring device of drain amount and useless compressed air discharge amount 2 Air-water separation means 2b Inlet 2c Outlet 2d Deflector 2e Drain outlet 3 Flow rate measuring means 4 Air compressor 4b First compression means 4c Intercooler 4d Second compression Means 4e After cooler 4f Drain discharge port 5 Refrigeration air dryer 5b Drain discharge port 6 Air tank 6b Drain discharge port 7 Equipment 7b Drain discharge port 8 Orifice or halfway open valve 9 Drain trap 10 Drain pit 11 Oil / water separator

Claims (1)

A drainage and compressed air metering device connected to an orifice or halfway open valve provided at the drain outlet of either an intercooler or aftercooler or refrigeration air dryer connected to an air compressor There,
In order to separate and remove the drain in the compressed air, the centrifugal separator has an inlet, a deflector that generates a swirling flow by directing the compressed air that has entered from the inlet downward, and an outlet that is positioned horizontally facing the inlet. An air-water separating means comprising a separator, and a flow rate measuring means connected to a subsequent stage of the air-water separating means and capable of measuring an integrated flow rate of the compressed air discharge amount,
The drain amount and the waste compressed air discharge amount are characterized by simultaneously measuring the drain amount and the waste compressed air discharge amount in a state where the drain amount and the compressed air amount discharged from the drain outlet are limited. Simultaneous weighing device.