JPH0735433U - Trash air transport equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to control the wind speed in the transportation pipe to an appropriate value without wasting the electric power used by the blower in the device that sucks dust in the air transportation pipe and transports it. . [Structure] The frequency converter 1 is attached to the drive motor 9 of the blower 6.
4 and the control circuit 15 are connected to each other, and the frequency of the input power source of the drive motor 9 is changed so that the wind speed in the transportation pipe 1 becomes equal to the planned wind speed. Thereby, the rotation speed of the blower 6 and the change of the wind speed are synchronized, and the wind speed can be controlled to an appropriate value with the minimum power consumption.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for collecting and storing garbage by pneumatic transportation.

[0002]

[Prior art]

 In urban redevelopment and construction of large buildings, transportation devices that collect and store garbage by air transportation are beginning to be adopted in order to stably and efficiently collect large amounts of garbage.

As shown in FIG. 1, this dust pneumatic transportation device is provided with a plurality of dust inlets 2 in an air transportation pipe 1 which is installed underground, in a joint premises, under the floor of a building, etc. It is configured by connecting a dust separator 3 and a dust remover 4, a deodorizer 5, and a blower 6 to the pipe 1. The dust introduced into the air transport pipe 1 from the inlet 2 is transported by air suction by the blower 6. Then, after being separated from the air by the dust separator 3, the separated dust is stored in the dust storage facility 7.

In the above-described air transportation device, since the dust is continuously and continuously transported, the wind speed inside the air transportation pipe 1 is constant even if the dust transportation load (the amount of dust transported per unit time) changes. Are controlled to become.

As shown in FIG. 3, the conventional method for controlling the wind speed is to provide an orifice 16 between the blower 6 and the exhaust port 8 of the air transport pipe 1, and further to provide a resistance valve between the deodorizer 5 and the blower 6. 20 is installed, and the blower 6 and its drive motor 9 are selected so that the planned wind speed can be obtained when the maximum load is applied during the pneumatic transportation of dust. When is small, the resistance valve 20 applies resistance to the air flow inside the transport pipe 1 so that the wind speed does not exceed the necessary value, and control is performed so as to obtain the planned wind speed even if the load fluctuates.

In the control structure of FIG. 3, 9 is a drive motor for the blower 6, 10 is a detector for detecting the differential pressure between the internal pressure of the air transport pipe 1 and the atmospheric pressure, 11 is a temperature detector, and 12 is detection. A pressure / temperature compensator for compensating the output pressure and temperature value and outputting it, and 13 is a wind speed indicator controller.

[0007]

[Problems to be solved by the device]

 However, in the conventional control method as described above, when the wind speed is limited by the resistance of the resistance valve 20, the drive motor 9 of the blower 6 continues to operate according to its capacity, so that the resistance valve 20 reduces the resistance. There is a problem that power (energy) is wasted by the added amount.

The waste of electric power due to this resistance occupies about 10 to 30% of the electric power used by the drive motor 9 on average, and has a large proportion in the electric power used by the entire device.

Therefore, an object of the present invention is to solve the above problems and provide an apparatus capable of controlling the wind speed in an air transportation pipe to an appropriate value without wasting energy. .

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a detector for detecting the internal wind speed in an air transport pipe, and the wind speed detected by the above detector is out of the set wind speed value in the drive motor of the blower. At times, I connected a means to change the frequency of the input power of the drive motor.

[0011]

[Action]

 In the above structure, the wind speed in the air transportation pipe is always detected by the detector, and the frequency of the input power of the drive motor is changed so that the wind speed becomes the set value, and the rotation speed of the blower is adjusted. As a result, the rotation of the blower and the wind speed can be synchronized, and the wind speed (transportation amount) can be controlled to an appropriate value.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The basic structure of the pneumatic transportation device is the same as the conventional one described above, and the same parts are designated by the same reference numerals and the description thereof will be omitted.

FIG. 2 shows a control structure of the dust air transportation apparatus of the embodiment, in which a power converter of the drive motor 9 of the blower 6 uses a frequency converter (inverter) for changing the frequency of the input power source to the drive motor 9. , INV) 14, and the frequency converter 14 is connected to the wind speed indicator controller 13 and the pressure / temperature compensator 12 via the control circuit 15.

The control circuit (PID control) 15 is assumed to perform PID control of proportional P, integral I, and differential D, and the optimum acceleration / deceleration response speed can be arbitrarily set by converting the frequency of the input power source. It is like this.

In the transportation apparatus having the above structure, the control circuit compares the wind speed inside the air transportation pipe 1 input from the pressure / temperature compensator 12 with the arbitrarily set planned wind speed to detect the wind speed. When the determined wind speed is higher than the planned wind speed, the frequency converter 14 lowers the frequency of the input power source of the drive motor 9. On the contrary, when the detected wind speed becomes lower than the planned wind speed, the frequency of the input power supply is increased and the wind speed is controlled to reach the planned value.

As a result, the change in the rotation speed of the blower 6 and the change in the wind speed in the air transport pipe 1 are synchronized, and the wind speed is determined according to the output of the blower 6, so that the power consumption is wasted. Instead, the wind speed can be controlled to an appropriate value.

[0017]

【effect】

 As described above, this device synchronizes the frequency of the input power source with respect to the blower drive motor and the change in the wind speed, and determines the wind speed according to the rotation speed of the blower. Therefore, it is possible to save the waste of the electric power used by the blower, and to stably perform the pneumatic transportation of dust at low cost.

[Submission date] November 28, 1994

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention connects a dust separator and a blower to an air transport pipe having a plurality of dust input ports, and sucks the trash injected into the air transport pipe from the input ports by air suction by the blower. In a pneumatic transport device for trash that is transported by means of a dust separator to separate air and dust, a differential pressure detector that detects the differential pressure between the internal pressure of the transport pipe and atmospheric pressure, and the transport pipe. A temperature detector that detects the internal temperature is provided, and a pressure temperature compensator that outputs the wind speed corrected by the detected pressure and temperature value is connected to the differential pressure detector and the temperature detector, and it is connected to the blower drive motor. The means for changing the frequency of the input power source of the drive motor is connected when the wind speed inside the air transport pipe output from the pressure temperature compensator deviates from the set wind speed value.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

[Action]

In the above structure, detects the velocity of the air transport tube to normal, the wind speed by changing the frequency of the input power of the drive motor so that the setting value, adjusts the rotational speed of the blower. As a result, the rotation of the blower and the wind speed can be synchronized, and the wind speed (transportation amount) can be controlled to an appropriate value. Further, since the wind speed compared with the set value is corrected by the temperature value inside the air transport pipe, it is possible to always obtain the wind speed value corresponding to a constant temperature. Therefore, it is possible to detect only a change in the actual wind speed, even if the temperature changes, it is possible to obtain the wind speed required to control the accurate.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

[0017]

【effect】

As described above, this device synchronizes the frequency of the input power supply to the blower drive motor with the change in the wind speed, and determines the wind speed according to the number of revolutions of the blower.Therefore, the wind speed is controlled by a resistance valve. Therefore, it is possible to save the waste of the electric power used by the blower, and to stably perform the pneumatic transportation of dust at low cost. Also, comparing the wind speed of the air transport tube is corrected by the temperature values, it is possible to detect a change in the relationship of Ku actual wind speed to changes in the temperature environment, the correct wind speed setting value that determines the transport of waste it can be, can be determined promptly by using an control wind speed with high accuracy.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic structure of a dust air transportation device.

FIG. 2 is a circuit diagram showing a wind speed control structure of an embodiment.

FIG. 3 is a circuit diagram showing a conventional wind speed control structure.

[Explanation of symbols]

 1 Air Transport Pipe 2 Dust Inlet 3 Dust Separation 6 Blower 9 Drive Motor 10 Differential Pressure Detector 12 Pressure Temperature Compensator 13 Wind Speed Indicator Controller 14 Frequency Converter 15 Control Circuit

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[Procedure amendment]

[Submission date] November 28, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A dust separator and a blower are connected to an air transport pipe having a plurality of dust input ports, and the dust thrown into the air transport pipe from the input ports is transported by air suction by the blower, and the dust separator is used. In the dust air transportation device for separating air and dust, a detector for detecting the internal wind speed is provided in the air transportation pipe, and the wind speed detected by the detector is set to the wind speed value set in the drive motor of the blower. An apparatus for pneumatically transporting dust, comprising means for changing a frequency of an input power source of a drive motor when the apparatus is detached.