CN2555085Y

CN2555085Y - Dusting efficiency detector of flat cloth bag duster

Info

Publication number: CN2555085Y
Application number: CN 02262857
Authority: CN
Inventors: 周忠平
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-02
Filing date: 2002-07-02
Publication date: 2003-06-11
Anticipated expiration: 2012-07-02

Abstract

A dusting efficiency detector of a flat cloth bag duster comprises air sampling ports Q1 and Q2, a differential pressure transformer DP, a programmable controller CPU, a CPU expansion analog/digital converting module A/D, a relay KA, an indicating lamp HL and a power source component. The air sampling ports Q1 and Q2 are used for sampling the internal pressure and the external pressure in a filtering bag. The sample is processed by the differential pressure transformer DP to form a differential pressure analog amount signal. After A/D conversion of the differential pressure signal, the CPU judges the valve of the differential pressure which is detected timely according to the preset program. If the judging result is that the dedusting efficiency is too low, the CPU sends signal to the relay KA so as to favor closing a normally open contact, thus the indicating lamp HL shines and the automatic detection for the dedusting efficiency is realized. The utility model prevents the operator replacing the filtering bag blindly, makes full use of the filtering bag of the deduster and reduces the operating cost of the dedusting.

Description

Flat bag filter efficiency of dust collection checkout gear

Affiliated technical field

The utility model relates to a kind of flat bag filter efficiency of dust collection automatic detection device.

Background technology

The bag-type dust unit claims air cleaner again, form by depression dust-removing blower fan and filtration cloth bag group, be the device that makes dusty gas pass through filtering material and then dust separation is captured, be mainly used in the gas purification of ventilation and air conditioning aspect, efficiency of dust collection can reach more than 99%.The filter bag of bag-type dust machine has flat bag and two kinds of shapes of circle bag, flat bag because of its in identical filter area condition lower volume the less and more widespread usage that obtains easy to maintenance.

At present, the efficiency of dust collection of flat bag filter is only judged with staff's experience, and is regularly replaced filter bag in view of the above.The accuracy that artificial experience is judged efficiency of dust collection is relatively poor, and easily cause the problem of following two aspects: 1, under the situation that does not arrive the filter bag stage of replacement, the efficiency of dust collection of filter bag obviously descends, and does not change filter bag this moment and can cause dust removing effects to descend; 2, under the situation that arrives the filter bag stage of replacement, the efficiency of dust collection of filter bag is still very high, and change filter bag and can cause unnecessary waste this moment.

According to the knowledge of the applicant, size and its efficiency of dust collection of the vapour lock value of the cloth bag group of flowing through are inversely proportional to, and the vapour lock value can reflect by filter bag both sides draught head.

Summary of the invention

Technical problem to be solved in the utility model is, overcome personnel's experience and judge the shortcoming of efficiency of dust collection poor accuracy, the differential pressure signal that exists with flat bag filter filter bag both sides provides a kind of flat bag filter efficiency of dust collection checkout gear that utilizes differential pressure signal to detect efficiency of dust collection automatically as the detected characteristics signal of efficiency of dust collection.

The technical scheme that its technical problem that solves the utility model adopts is as follows: a kind of flat bag filter efficiency of dust collection checkout gear, it is characterized in that by air pressure sample tap Q1, Q2, differential pressure transmitter DP, Programmable Logic Controller CPU, CPU expanded mode number conversion modules A/D, relay K A, indicator lamp HL and power supply apparatus are formed, air pressure sample tap Q1 is between air inlet and filter bag inboard, air pressure sample tap Q2 is positioned at the filter bag outside, sample tap is connected with the sampling input pipe of differential pressure transmitter DP, the terminal 1 of DP connects the dc source anode, terminal 2 connects the I0 terminal of CPU expanded mode number conversion modules A/D, the C0 terminal of A/D module connects the zero end of dc source, the Q6 terminal of CPU is connected with 13 terminals of relay K A, 14 terminals of KA are connected with the N of 220V AC power end, the auxiliary normally opened contact 6 of KA is connected with the anode of indicator lamp HL, the auxiliary normally opened contact 10 of KA is connected with the L of 220VAC end, and the negative terminal of indicator lamp HL is connected with the N of 220VAC end.

The beneficial effects of the utility model are as follows: by air pressure sample tap Q1, Q2 is in the filter bag, outside air pressure sampling, handle formation differential pressure analog signals through differential pressure transmitter DP, differential pressure signal is through the A/D analog-to-digital conversion, form real-time differential pressure value, Programmable Logic Controller CPU judges real-time detected differential pressure value by the program that sets in advance, and send control corresponding according to judged result and indicate, if judged result is that efficiency of dust collection is low excessively, then signal to relay K A, make its auxiliary normally opened contact 6,10 closures, indicator lamp HL is bright, inform that the staff should change filter bag of dust collector, so just avoid changing the blindness of filter bag, made the filter bag of deduster obtain more fully effectively utilizing, reduced dedusting operating cost.If judged result is that efficiency of dust collection is normal, then CPU does not signal to relay K A, and relay K A is failure to actuate like this, and indicator lamp HL does not work.The utility model circuit structure is simple, reliable, realizes the automatic detection of flat bag filter efficiency of dust collection, effectively improves the utilization ratio of cleaner.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the utility model electrical schematic diagram.

The specific embodiment

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.

As depicted in figs. 1 and 2, flat bag filter efficiency of dust collection checkout gear is by air pressure sample tap Q1, Q2, differential pressure transmitter DP, Programmable Logic Controller CPU, CPU expanded mode number conversion modules A/D, relay K A, indicator lamp HL and power supply apparatus are formed, air pressure sample tap Q1 is between air inlet and filter bag inboard, air pressure sample tap Q2 is positioned at the filter bag outside, sample tap is connected with the sampling input pipe of differential pressure transmitter DP, the terminal 1 of DP connects the dc source anode, terminal 2 connects the I0 terminal of CPU expanded mode number conversion modules A/D, the C0 terminal of A/D module connects the zero end of dc source, the Q6 terminal of CPU is connected with 13 terminals of relay K A, 14 terminals of KA are connected with the N of 220V AC power end, the auxiliary normally opened contact 6 of KA is connected with the anode of indicator lamp HL, the auxiliary normally opened contact 10 of KA is connected with the L of 220VAC end, and the negative terminal of indicator lamp HL is connected with the N of 220VAC end.

Among the embodiment, the model of main circuit device is: CPU is NEZA TSX08CD12R, and A/D is NEZA TSX08EA42, and DP is KYB 14-5KPa, and KA is HH514P, and HL is AD16.The air pressure sample tap is the breather pipe that designs voluntarily.

Claims

1, flat bag filter efficiency of dust collection checkout gear, it is characterized in that by air pressure sample tap Q1, Q2, differential pressure transmitter DP, Programmable Logic Controller CPU, CPU expanded mode number conversion modules A/D, relay K A, indicator lamp HL and power supply apparatus are formed, air pressure sample tap Q1 is between air inlet and filter bag inboard, air pressure sample tap Q2 is positioned at the filter bag outside, sample tap is connected with the sampling input pipe of differential pressure transmitter DP, the terminal 1 of DP connects the dc source anode, terminal 2 connects the I0 terminal of CPU expanded mode number conversion modules A/D, the C0 terminal of A/D module connects the zero end of dc source, the Q6 terminal of CPU is connected with 13 terminals of relay K A, 14 terminals of KA are connected with the N of 220V AC power end, the auxiliary normally opened contact 6 of KA is connected with the anode of indicator lamp HL, the auxiliary normally opened contact 10 of KA is connected with the L of 220VAC end, and the negative terminal of indicator lamp HL is connected with the N of 220VAC end.