JPS6142317A - Dust collector filter/dust removal device - Google Patents

Abstract

PURPOSE:To automatically perform proper operation, in a dust removing apparatus, by providing differential pressure detectors before and after a filter, a differential pressure display device, a setting device for setting the upper and lower limit of differential pressure, a display device for displaying differential pressure and a control means for stopping the operation of the apparatus on the basis of the set values. CONSTITUTION:A control part 15 consists of CPU15a, memory 15b and an interface 15c, and the detection signal f1 of filter pressure loss from a differential pressure detector 14, the set signal f2 from upper and lower limit value setting knobs 30, 31, the sensor signal f3 from a backet sensor 8S and the change-over signal f4 from a mode change-over switch 35 are inputted to the interface 15c. From the interface 15c, the display signal f5 to a display panel 20 and control signals f6, f7 to a dust removing machine 10 and a fan motor 6 are outputted and these displays and control are performed according to the program of memory.

Description

[Detailed description of the invention]

[Industrial Application Field 1] The present invention relates to a filter dust removal device for a dust collector that automatically and efficiently wipes off dust adhering to a filter during arbor operation according to a preset program. [Prior Art] An important point in the continuous operation of a dust collector is the dust removal effect of the filter, and whether or not a dust collector can exhibit a stable dust collection effect over a long period of time depends entirely on the quality of the dust removal effect. Japanese Patent Application No. 54-165956 filed by the applicant
The invention of No. 6-89816) provides a dust collector configured such that a dust remover (pulse jet) automatically brushes off dust attached to the filter at predetermined intervals, and the dust removal interval by the dust remover is adjusted between before and after the filter. The control unit adjusts the differential pressure to a longer or shorter value according to the detected amount of differential pressure, thereby automatically adjusting the filter pressure loss within the predetermined upper and lower limit settings, and reducing the filter pressure. It always maintains the loss at a desired state, and can solve various problems such as a decrease in air volume due to an increase in pressure loss, or dust leakage due to an excessive decrease in pressure loss, and improves the long-term stability of the dust collector. It can provide excellent driving effects.

Problem to be Solved by the Invention 1 However, in the filter dust removal device disclosed in the above application, when the most ideal pressure loss of the filter is set to △P, the upper limit is △p+io and the lower limit is △ Since the setting was automatically set to P-10, there were cases where proper dust removal could not be performed. That is, the conventional filter removal M device described above can be used to
Prior to filter material etc. (, determined upper limit ΔP
Since the dust is removed within the range of +10 and the lower limit ΔP-10, there are problems such as insufficient dust removal or repeated excessive dust removal, resulting in an excessive drop in pressure loss. was there. Furthermore, since the standard value of pressure loss is preset at the factory, etc., it is not possible to know the value of the standard value △P that is actually set during operation. Since it is not possible to confirm the level of pressure loss inside the filter, the operation must be carried out entirely by feeling and left entirely to the machine, which poses the problem of making dust collection operation with an appropriate filter pressure drop extremely difficult. Ta. [Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and its purpose is to solve various conditions such as the type of dust to be collected and the material of the filter. In addition, the upper and lower limits of pressure loss that control the operation of the dust remover can be arbitrarily set, and the dust remover is automatically controlled so that the dust collector can operate properly within these upper and lower setting ranges. In addition, the set upper and lower limit values are displayed on the display, and the pressure loss value during the current operation is also displayed on the display, making it possible to check the operating status of the dust collector and dust remover at a glance. The object of the present invention is to provide a filter dust removal device for a dust collector that is devised to enable confirmation. In order to achieve each of the above-mentioned objects, the filter dust removal device according to the present invention includes a differential pressure detection means for detecting the differential pressure (pressure loss) before and after the filter from the negative pressure between the filter chamber and the clean chamber; A differential pressure display means for displaying the detected differential pressure in the form of a bar graph on a display panel of a display panel provided in the dust collector, and upper and lower limit values for the upper and lower limits of the differential pressure that can be set arbitrarily, respectively. a setting means, a display means for the upper and lower limits for displaying the upper and lower limits set by these setting means on the display, and upper and lower limits at which the differential pressure of the filter is set; A detection means detects that the differential pressure of the filter has reached the upper limit value, and when it is detected that the differential pressure of the filter has reached the upper limit value, a U remover for the filter is activated, and the differential pressure of the filter reaches the lower limit value by removing dust. and a dust remover control means for stopping the operation of the dust remover when it is detected that the dust remover has been removed. [Function] According to the filter dust removing device for a dust collector of the present invention configured as described above, the pressure loss of the filter is constantly displayed in the form of a part graph on the display (LED display) of the display panel, and also on the setting dial, for example. The upper limit value and lower limit value appropriately set by the setting means are displayed by lighting on the corresponding value area on the display. When the dust adhesion to the filter progresses and the pressure loss reaches the upper limit, the dust remover is activated to remove the dust adhering to the filter. If the pressure loss drops to the lower limit value due to dust removal, dust collection operation will continue, but if the pressure loss does not drop to the lower limit value after one dusting, dust removal will be repeated until the lower limit value is reached. . However, when the number of repeated sweeps reaches a predetermined maximum number, the screen display,
An alarm is issued, the dust collection operation is stopped, and the dust is removed again to recover the filter.

Embodiment Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In Figures 3 and 4, 1 is a dust collector body whose interior is divided into two upper and lower chambers, a clean chamber 3 and a filter chamber 4, by a partition plate 2. A fan 6 is attached thereto, and filters 7 . . . are attached inside the filter chamber 4. 8 is filter chamber 4
9 indicates a dust suction port opened on the side of the filter chamber 4, and receives the suction action of a fan 6 rotated by a motor 5 into a duct (not shown).
The dust-laden air sucked into the filter chamber 4 through the dust suction port 9 through the dust suction port 9 is filtered by the filter 7, and only clean air is exhausted from the clean chamber 3 to the outside of the aircraft 1. . Also, what is generally indicated by the reference numeral 10 in FIGS. 3 and 4 is a pulse jet dust remover, which is an example of a dust remover, and this dust remover 10 is shown in FIG. The header vibrator 11 is composed of a header vibrator 11, a compressor 11P that supplies compressed air to the vibrator 11, and the same number of blow tubes 13 as the number of rows of the filters 7 connected to the header vibrator 11 through electromagnetic valves 12, respectively. Ori,
The distal end of each of these blow tubes 13 is inserted into the clean chamber 3 so that compressed air can be jetted into the corresponding filter 7. The present invention is used in a dust collector equipped with the dust remover 10 as described above, and in FIG. 15 is a differential pressure detector such as a diaphragm type sensor that detects the pressure loss ΔP, and 15 controls the opening and closing of the electromagnetic valve 12 based on the pressure loss value detected by the differential pressure detector 14, or This is a control unit (microcomputer) that sends various display signals to the display panel 20 provided on the front of the aircraft body 1. As shown in FIG. 5, the display panel 20 includes an LED display 21 that displays the pressure loss value of the filter 7 detected by the differential pressure detector 14 in the form of a bar graph 21a, an indicator lamp 22 for power supply, A sensor check lamp 23 that lights up when there is no output signal from the differential pressure detector 14 to notify an abnormality, and a sensor check lamp 23 that lights up for 15 minutes of energization to notify that variable adjustment of the upper and lower limit values of pressure loss is possible. A permission lamp 24, and a clogging alarm lamp 25 that lights up to warn of clogging when the pressure loss of the filter reaches the upper limit and does not recover even after repeating the dust removing operation a preset number of times (for example, 5 cycles). , a sensor plan 26 that lights up to warn when the dust level packet sensor 8S attached to the dust packet 8 catches various sensor signals such as a temperature sensor (not shown), and the pressure loss of the filter 17 increases and is removed. The dust removal lamp 27 flashes when an operation command is issued, the pressure loss drops to the lower limit due to dust removal, and the filter 7 is refreshed, and the fan 6 is activated when the power supply is connected in the opposite direction.
A fan rotation lamp 28 is provided that lights up to warn when the fan rotates in reverse. The display panel 20 also includes an upper limit setting knob 30 having a dial structure for setting the upper limit of the filter pressure loss.
A lower limit value setting knob 31 with the same dial structure for setting the lower limit value is provided, and furthermore, each switch 32, 33 for power on/off, and a manual valve that can open the solenoid valve 12 and blow out one cycle of pulsed air. A push button switch 34 is also provided. FIG. 6 is a block diagram showing the electrical configuration of the present invention.
15a, a memory 15b, and an interface 15c, and the interface 15c receives a filter pressure loss detection signal f sent from the differential pressure detector 14.
1, a setting signal f2 for the upper and lower limit values of the filter pressure loss set by the upper and lower limit value setting knobs 30 and 31, and a sensor signal f from the packet sensor 88, etc.
3. The switching signal f4 from the mode switching switch 35 used for software switching is inputted. Further, from the interface 15c, a display signal f5 for the LED display 21 of the display panel 20 and each lamp 22 to 28, and a display signal f5 for the dust remover 1
0 (specifically, the solenoid valve 12) and the control signals f6 and f7 for the fan motor 6, respectively, and these displays and controls are executed according to a program stored in the memory 15b. FIG. 7 is a flowchart of a program for setting the upper and lower limits of the filter pressure drop. In step S1, the setting permission lamp 24 on the display panel 20 is turned on for only 5 minutes after the dust collector starts operating, so that variable adjustment is possible. to announce. In the next step S2, it is determined whether the setting operation using the dial setting knobs 30 and 31 for upper and lower limit values has been performed within a predetermined time, and if it is within the time, the setting is performed in the next step S3. Store the upper and lower limit values in memory 1.
5b, and furthermore, in the next step S4, these two values are displayed as lighting displays P1 and P2 on the corresponding chain portions of the ED display 21, respectively, as shown in FIG. If it is determined in step S2 that the adjustment is to be made after the lapse of time, the adjustment is not possible and dust removal is controlled using the previous upper limit value P1 and lower limit value P2. FIG. 8 is a flowchart of the program that controls the display on the display panel 20 and the dust remover 10. In the first step S5, the filter pressure loss sent from the differential pressure detector 14 is displayed as a bar graph on the LED display 21. (see Figure 5). In the next step S6, it is determined whether the detected filter pressure loss has reached the set upper limit P1,
This routine is repeated until the filter pressure loss reaches the upper limit P1. When the filter pressure loss reaches the upper limit value P1, the dust removal lamp 27 is turned on in the next step S7, and the dust remover 10, that is, the solenoid valve 12 is opened in the next step S8 to jet compressed air into the filter 7. Next step S
In step 9, it is determined whether the filter pressure drop has decreased to the lower limit value P2 due to the above-mentioned dust removal, and if the filter 7 is recovered by one dust removal as shown in A in FIG. Proceeding to the next step S10, the dust removal lamp 27 is blinked again to display a refresh display, and one cycle of the dust removal process is completed. As a result of the determination in step S9, if the filter 7 is not completely refreshed by one dust removal as shown in B in FIG. times), the process returns to step S8 to repeat dust removal, and this routine is repeated until it is determined in step S9 that the filter pressure loss has reached the lower limit value P2. In the case of B in Figure 2, by repeating the above dust removal five times, the filter pressure drop drops below the lower limit P2 and is refreshed, but as shown in C in the same figure, even after five times of dust removal, the filter pressure drop drops to the lower limit P2.
If the number of times has not been reached and it is determined in step S11 that the number of times has exceeded, the process advances to step S12 and the clogging alarm lamp 25 is turned on. Furthermore, after the 25-day lamp, the next step S1 is performed as shown in the figure.
3, stop the operation of the dust collector and notify that the clogging of the filter 7 cannot be cleared by normal dust removal operation, or
Each program is selected and executed according to the software set in advance, such as continuing dust removal by the dust remover 10 again, or stopping dust removal but continuing dust collection operation. Also, weight removal 1
In addition to the pulse jet type dust remover shown in the figure, various types of dust removers such as a dust remover type, a brush type, and a backwash type may be used instead. Effect 1 of the invention The filter dust removal device for a dust collector according to the present invention is as described above, and the filter dust removal is performed between the set upper limit value and the lower limit value, so that the pressure loss of the filter is always adjusted to be suitable for dust collection. However, in the present invention, in particular, the pressure loss value of the filter during the current operation is displayed in the form of a bar graph on the display panel. Therefore, it is very convenient to proceed with dust collection operation while visually checking the pressure loss situation, and it is also possible to change the settings of the upper and lower limits of pressure loss, which are the standards for controlling the dust remover. Due to the flexible configuration, the upper and lower pressure drop widths can be set arbitrarily according to the filter material used and the type of dust to be collected, and the operation of the dust remover can be controlled under optimal conditions. Proper operation can be ensured. In addition, in the present invention, since the set upper and lower limits of the pressure loss are displayed on the display device that displays the pressure loss during the operation in the form of a bar graph, the current pressure loss is the upper limit set. This has the advantage that the operating status of the dust collector can be accurately grasped by visually confirming the position between the value and the lower limit value.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram clearly showing the entirety of the present invention, Fig. 2 is an explanatory diagram showing how the pressure loss of the filter changes due to dust removal, and Fig. 3 is a front perspective view of a U collector implementing the present invention. Figure 4 is a configuration diagram showing the internal structure and control system of the dust collector, Figure 5 is a front view of the display panel, Figure 6 is a block diagram showing the electrical configuration of the control section, and Figure 7 is the pressure FIG. 8 is a flowchart illustrating the flow of setting the upper and lower limit values of loss. FIG. 8 is a flowchart illustrating the flow of pressure loss display and dust removal operation. 1 is the body of the dust collector, 3 is the clean room, 4 is the filter room, 5
is a fan motor, 7 is a filter, 10 is a dust remover, 14 is a differential pressure detector, 15 is a control unit, 20 is a display panel, 21 is a display, 22 to 28 are display lamps, 30.31 are upper and lower limit settings Picking. Pigeon Figure 7

Claims (1)

[Claims] A differential pressure detection means that detects the differential pressure (pressure loss) before and after the filter from the negative pressure in the filter chamber and clean room, and a differential pressure that displays the detected differential pressure in the form of a bar graph on the display panel installed in the dust collector. a display means, a setting means for upper and lower limit values which can arbitrarily set the upper and lower limit values of the differential pressure, and displaying the upper and lower limit values set by these setting means; A display means for displaying the upper and lower limit values on the device, a detection means for detecting that the differential pressure of the filter has reached the set upper and lower limit values, and a detection means for detecting that the differential pressure of the filter has reached the upper limit value. a dust remover control means that operates a dust remover for the filter when it is detected that the filter has been removed, and stops the operation of the dust remover when it is detected that the differential pressure of the filter has reached a lower limit value due to dust removal; A filter dust removal device for a dust collector, characterized in that it is configured by.