CN214042101U - Circuit structure for multi-path sharing of DO port - Google Patents
Circuit structure for multi-path sharing of DO port Download PDFInfo
- Publication number
- CN214042101U CN214042101U CN202120122901.3U CN202120122901U CN214042101U CN 214042101 U CN214042101 U CN 214042101U CN 202120122901 U CN202120122901 U CN 202120122901U CN 214042101 U CN214042101 U CN 214042101U
- Authority
- CN
- China
- Prior art keywords
- pressure measuring
- wind pressure
- plc controller
- switching value
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a multi-path shared circuit structure of a DO port, which comprises a PLC controller and at least two paths of wind pressure measuring devices, wherein each path of wind pressure measuring device comprises a pressure pipe and a normally open solenoid valve connected in series on the pressure pipe, and each path of wind pressure measuring device also comprises a J relay connected between the normally open solenoid valve and the PLC controller; every wind pressure measuring device all the way all corresponds and sweeps the device all the way, and every sweeps the device all including being used for sweeping the bleeder pipe to corresponding pressure pipe sweeping gas, every sweep all have on the bleeder pipe connect in the normally closed solenoid valve of PLC controller, and two at least normally closed solenoid valves through the normally open contact of J relay among the corresponding wind pressure measuring device connect in the same DO switching value port of PLC controller. The DO use amount can be saved to this scheme, under the prerequisite of system that sweeps on the same scale, can use the PLC controller that the DO point was still less, when reducing system cost, reduces the controller volume, satisfies the miniaturized demand of instrumental equipment.
Description
Technical Field
The utility model belongs to the technical field of boiler deashing system automatic control, especially, relate to a circuit structure of DO port multichannel sharing.
Background
In the industries of electric power, coal chemical industry, ferrous metallurgy, cement, papermaking, petrochemical oil refining, biofuel boilers and the like, the air quantity and the air pressure are measured, the pressure guiding pipe is a 304 stainless steel pipe with the outer diameter of 10mm, the through hole of 6mm or the through hole of 14mm and the through hole of 10mm, the pressure guiding pipe is used for long distance pressure guiding, various bends, a connecting welding joint and an isolating stop valve are arranged in the middle of the pressure guiding pipe and connected to a sensor or a transmitter, a conversion joint is arranged at the joint of an instrument, the instrument is required to be disassembled and checked when the pressure guiding pipe runs for a certain period of time, and the instrument is required to be overhauled and disassembled during the running.
As time goes on, the whole instrument pipeline is more, less and small leakage points which are difficult to find appear, and the leakage points of the pressure leading pipe are difficult to test and difficult to find and search manually due to the field environment; and the instrument pipeline that arouses more easily under the condition that the leak source appears blocks up, needs the maintenance and repair personnel to spend a large amount of time in sweeping the examination and approval procedure and the manual work instrument pipe work of sweeping, and often artifical the dismantlement, and the manual work sweeps, makes the pipeline leak source increase, and then makes the frequency of sweeping rise greatly, so form vicious circle, cause a large amount of manual works and economic benefits to lose.
In order to solve a series of problems caused by manual purging, people have long-term exploration and provide an automatic timing purging system based on a PLC control system, but in the purging process, signals need to be forcibly locked to avoid disturbance on an upper computer or a DCS in the purging process, so that normally open electromagnetic valves on a plurality of pressure leading pipes and normally closed electromagnetic valves on purging branch pipes need to be switched, and analog quantity channels need to be switched in a scene with current channel switching. And secondly, a multipoint common control mode is adopted in violation of a one-to-one control principle, so that the independence of hardware is violated, and the possibility of fault occurrence is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a circuit structure of DO port multichannel sharing.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
a kind of DO port multipath shared circuit structure, including PLC controller and at least two-way wind pressure measuring device, every wind pressure measuring device includes the pressure pipe and connects the normally open electromagnetic valve on the pressure pipe in series, every wind pressure measuring device also includes a J relay connected between normally open electromagnetic valve and PLC controller;
every wind pressure measuring device all the way all corresponds and sweeps the device all the way, and every sweeps the device all including being used for sweeping the bleeder pipe to corresponding pressure pipe sweeping gas, every sweep all have on the bleeder pipe connect in the normally closed solenoid valve of PLC controller, and two at least normally closed solenoid valves through the normally open contact of J relay among the corresponding wind pressure measuring device connect in the same DO switching value port of PLC controller.
In the above-mentioned multi-path shared circuit structure of the DO ports, J relays of different wind pressure measuring devices are connected to the same or different DO switching value ports of the PLC controller, and are connected to the J relays of the same DO switching value port, and corresponding normally open contacts are connected to different DO switching value ports of the PLC controller.
In foretell DO port multichannel sharing's circuit structure, this structure includes that two way wind pressure measuring device and two corresponding ways sweep the device, and two ways wind pressure measuring device's J relay is connected at the different DO switching value ports department of PLC controller, and two ways normally closed solenoid valve that sweep the device connect in through the normally open contact of J relay among the corresponding wind pressure measuring device of two ways the same DO switching value ports of PLC controller respectively.
In the above-mentioned circuit structure that DO port multichannel is shared, this structure includes three routes wind pressure measuring device and three routes that correspond and sweeps the device, and three routes wind pressure measuring device's J relay is connected in three different DO switching value ports department of PLC controller, and three routes are swept the normally closed solenoid valve of device and is connected in the same DO switching value port of PLC controller through the normally open contact of J relay among the corresponding wind pressure measuring device of three routes respectively.
In the above-mentioned circuit structure shared by multiple paths of DO ports, the structure includes three paths of wind pressure measuring devices and three corresponding paths of purging devices, wherein the normally closed solenoid valves of the two paths of purging devices are respectively connected to the same DO switching value port of the PLC controller through the normally open contacts of the J relays in the two paths of corresponding wind pressure measuring devices, and the normally closed solenoid valve of the other path of purging device is connected to the other DO switching value port of the PLC controller through the normally open contact of the J relay on the corresponding wind pressure measuring device;
the J relays of the three-path wind pressure measuring device are connected to two different DO switching value ports of the PLC, and the two J relays corresponding to the normally-open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC.
In the above-mentioned circuit structure shared by multiple DO ports, the structure includes four wind pressure measuring devices and corresponding four purging devices, wherein the normally closed solenoid valves of the two purging devices are respectively connected to the same DO switching value port of the PLC controller through the normally open contacts of the J relays in the two corresponding wind pressure measuring devices, and the normally closed solenoid valves of the other purging devices are respectively connected to the other DO switching value port of the PLC controller through the normally open contacts of the J relays in the two corresponding wind pressure measuring devices;
j relays of the four-path wind pressure measuring device are connected to two different DO switching value ports of the PLC, and two J relays corresponding to normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC.
In foretell DO port multichannel sharing's circuit structure, this structure includes that four ways wind pressure measuring device and corresponding four ways sweep the device, and four ways wind pressure measuring device's J relay is connected respectively in four different DO switching value ports of PLC controller, and four ways sweep the normally closed solenoid valve of device and connect in through the normally open contact of J relay among the corresponding wind pressure measuring device of four ways respectively in the same DO switching value port of PLC controller.
In the above-mentioned circuit structure with multiple shared DO ports, the structure includes four wind pressure measuring devices and corresponding four purging devices, wherein the normally closed solenoid valves of the three purging devices are respectively connected to the same DO switching value port of the PLC controller through the normally open contacts of the J relays in the three corresponding wind pressure measuring devices, and the normally closed solenoid valve of the other purging device is connected to the other DO switching value port of the PLC controller through the normally open contact of the J relay in the corresponding wind pressure measuring device;
j relays of the four-path wind pressure measuring device are connected to ports of three different DO switching values of the PLC, and three J relays corresponding to normally open contacts connected to the same DO switching value port are connected to ports of different DO switching values of the PLC.
In the above-mentioned circuit structure that the DO port multichannel is shared, every way purger all includes a D relay, and every normally closed solenoid valve all passes through corresponding D relay and connects in the PLC controller.
In the above-mentioned circuit structure with multiple paths of DO ports shared, all purging branch pipes are connected to a purging pipe, the purging pipe is provided with a compressed air pump, and the compressed air pump is connected to the PLC.
The utility model has the advantages that:
1. the DO consumption is saved, the PLC controller with fewer DO points can be used on the premise of purging the system on the same scale, the system cost is reduced, the size of the controller is reduced, and the miniaturization requirement of the instrument type equipment is met;
2. the design standard of point-to-point control can be met while the miniaturization is met.
Drawings
FIG. 1 is a circuit diagram of a port connection according to one embodiment;
FIG. 2 is a circuit diagram of a purging system according to a first embodiment;
FIG. 3 is a first circuit diagram of the port connection according to the second embodiment;
FIG. 4 is a circuit diagram of a purge system according to the second embodiment;
FIG. 5 is a second port connection circuit diagram according to the second embodiment;
FIG. 6 is a first circuit diagram of the port connection according to the third embodiment;
FIG. 7 is a circuit diagram of a purge system according to the third embodiment;
FIG. 8 is a second port connection circuit diagram according to the third embodiment;
fig. 9 is a third port connection circuit diagram in the third embodiment.
Marking: a PLC controller 1; a wind pressure measuring device 2; a transmitter 21; a pressure guiding pipe 22; a flow meter 23; a normally open solenoid valve 24; a purging device 4; a purge pipe 41; a compressed air pump 42; a normally closed electromagnetic valve 43; purging the branch pipe 44.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiment discloses a multi-path shared circuit structure of a DO port, which comprises a PLC (programmable logic controller) 1 and at least two paths of wind pressure measuring devices 2, wherein each path of wind pressure measuring device 2 comprises a pressure guiding pipe 22 and a transmitter 21, a normally open electromagnetic valve 24 and a flowmeter 23 which are sequentially connected on the pressure guiding pipe 22 in series.
Particularly, each wind pressure measuring device 2 further comprises a J relay connected between the normally open solenoid valve 24 and the PLC controller 1, and the J relays of all the different wind pressure measuring devices 2 are connected to the same or different DO switching value ports of the PLC controller; and every wind pressure measuring device 2 all corresponds and has sweeps device 4 all the way, and every way sweeps device 4 all includes the branch pipe 44 and the relay that sweeps that are used for sweeping gas to corresponding pressure guiding pipe 22, and all sweep the branch pipe 43 and all connect in sweeping pipe 41, thereby have compressed air pump 42 on sweeping pipe 41 and realize sweeping, and compressed air pump 42 is connected in PLC controller 1. Every sweeps all to have on the bleeder 44 and connects in PLC controller 1's normally closed solenoid valve 43, and every normally closed solenoid valve 43 all connects in PLC controller 1 through corresponding D relay, and two at least normally closed solenoid valves 43 connect in PLC controller 1's same DO switching value port through the normally open contact of J relay in corresponding wind pressure measuring device 2, and connect in the J relay of same DO switching value port, and corresponding normally open contact connects in PLC controller 1's different DO switching value port. The following are respectively exemplified by two wind pressure measuring devices, three wind pressure measuring devices and four wind pressure measuring devices:
example one
As shown in fig. 1 and fig. 2, the present embodiment includes two wind pressure measuring devices 2 and two corresponding blowing devices 4, and J relays of the two wind pressure measuring devices 2 are connected to different DO switching value ports of the PLC controller 1. Specifically, two normally open electromagnetic valves 24 of the two wind pressure measuring devices 2 are respectively connected to a DO1 port and a DO2 port of the PLC controller through a J1 relay and a J2 relay;
the normally closed solenoid valves 43 of the two-way purging device 4 are respectively connected to the DO3 port of the PLC controller 1 through the J1 relay and the normally open contacts J1-1 and J2-1 of the J2 relay, and a D1 relay and a D2 relay are respectively arranged between the two normally closed solenoid valves 43 and the PLC controller 1.
In this embodiment, a small-sized PLC controller can be used, for example, a small-sized PLC controller with 8 DO switching value ports is used, since the two-way wind pressure measuring device of this embodiment uses only 3 ports for electromagnetic valve control, and the remaining 5 ports, the DO4 port and the DO5 port can be used for connecting the pressure switch 6, for a system with a pipe blockage monitoring function, the DO8 port can be used for connecting a pipe blockage alarm ALM for pipe blockage alarm output, for a system requiring current channel switching during purging, the DO6 and the DO7 can be respectively used for switching a forced current channel of the two-way wind pressure measuring device and a current channel between the two current channels, under the forced current channel, a PLC controller 1 forces a signal to an upper computer measuring point, under the current channel, a measuring point signal monitored by a transmitter 21 is sent to the upper computer in real time, in fig. 1, a1 and a2 respectively represent two electrical switching structures corresponding to the two-way wind pressure measuring device, the PLC controller 1 sends a switching instruction to the A1 electric switching structure through a DO6 port, and the A1 electric switching structure executes a command to switch a current channel of the corresponding wind pressure measuring device into a forced current channel or an online current channel.
The working principle of the embodiment is as follows:
after the control system operates to set purging time, the system enters gas isolation, the PLC controller 1 controls the J1 relay to be electrified through a DO1 port, here, the J1 relay is connected with the left normally open electromagnetic valve 24 in the figure 2, the normally open electromagnetic valve 24 is electrified and closed, the pipeline of the pressure leading pipe 22 is subjected to gas isolation, meanwhile, as the J1 relay is electrified, the corresponding normally open contact J1-1 is closed, and the electric circuit of the D1 relay corresponding to the DO3 port is in a waiting state of being electrified.
The PLC 1 sends out a D3 port connection instruction, the D1 relay is electrified, the normally closed electromagnetic valve 43 on the left side in the figure 2 is electrified, the purging gas is introduced into the corresponding pressure leading pipe 22, and the introduced gas is blown out from the flowmeter 23 on the left side to purge the pressure leading pipe 22 on the left side.
After purging is finished, the DO3 port is disconnected, the D1 relay is powered off, the normally closed electromagnetic valve 43 is closed again, the DO1 port is disconnected, the J1 relay is powered off, the normally open electromagnetic valve 24 is normally opened again, and the flowmeter 3 is communicated with the transmitter 21 again.
The purging of the right pressure-leading pipeline is similar to the purging process of the left pipeline, and is not described herein again.
The DO ports of the small PLC are generally 6-8, the port sharing circuit of the scheme is used for expanding the switching value ports, the field control requirement can be met only by the small PLC, the cost of the controller is reduced, the point-to-point standard of the conventional design of the PLC is achieved, and meanwhile, the requirement on the arrangement of elements of a control box and the miniaturization requirement of instrument equipment are met.
Example two
As shown in fig. 3 and 4, the present embodiment includes a three-way wind pressure measuring device 2 and a corresponding three-way purging device 4, three normally-open electromagnetic valves 24 of the three-way wind pressure measuring device 2 are respectively connected to a DO1 port, a DO2 port and a DO3 port of the PLC controller 1 through a J1 relay, a J2 relay and a J3 relay; the normally closed solenoid valve 43 of the three-way purging device 4 is connected to the DO4 port of the PLC 1 through normally open contacts J1-1, J2-1 and J3-1 of a J1 relay, a J2 relay and a J3 relay respectively, and a D1 relay, a D2 relay and a D3 relay are arranged between the three normally closed solenoid valves 43 and the PLC 1 respectively.
In the present embodiment, a small PLC controller, for example, a small PLC controller with 8 DO switching ports can be used, since only 4 ports are used for controlling the solenoid valve in the three-way wind pressure measuring device of the present embodiment, the remaining 4 ports, for example, the DO8 port, can be used for connecting the pipe blockage alarm 5, and the DO5 port, the DO6 port, and the DO7 port can be respectively used for switching the current channels between the forced current channel and the on-line current channel of the three-way wind pressure measuring device.
The working principle of the embodiment is as follows:
after the control system operates to set purging time, the system enters gas isolation, the PLC controller 1 controls the J1 relay to be electrified through a DO1 port, the normally open electromagnetic valve 24 on the left side in the figure 4 is electrified and closed, the pipeline of the pressure leading pipe 22 is subjected to gas isolation, meanwhile, as the J1 relay is electrified, the corresponding normally open contact J1-1 is closed, and the electric circuit of the D1 relay corresponding to the DO4 port is in a waiting state for being electrified.
The PLC 1 sends out a D4 port connection instruction, the D1 relay is electrified, the left normally closed electromagnetic valve 43 in the figure 4 is connected, the purging gas is introduced into the corresponding pressure leading pipe 22, and the introduced gas is blown out from the left flowmeter 23 to purge the left pressure leading pipe 22.
After purging is finished, the DO4 port is disconnected, the D1 relay is powered off, the normally closed electromagnetic valve 43 is closed again, the DO1 port is disconnected, the J1 relay is powered off, the normally open electromagnetic valve 24 is normally opened again, and the flowmeter 3 is communicated with the transmitter 21 again.
The purging of the middle and right pressure-leading pipelines is similar to the purging of the left pipeline, and is not described herein again.
Through the port sharing circuit of this scheme, realize the extension of switching value port, will need the point-to-point control scene that 6 port control realized originally, through this scheme, use 4 ports just can realize, for present, can select relatively miniature PLC controller, reduce the controller cost to accomplish the point-to-point standard of PLC conventional design, also satisfied control box component simultaneously and arrange requirement and the miniaturized requirement of instrument equipment.
In addition, the system with three-way wind pressure measuring devices can be connected in the following way: the normally closed electromagnetic valves 43 of the two paths of blowing devices 4 are respectively connected to the same DO switching value port of the PLC controller 1 through the normally open contacts of the J relays in the two paths of corresponding wind pressure measuring devices 2, and the normally closed electromagnetic valve 43 of the other path of blowing device 4 is connected to the other DO switching value port of the PLC controller through the normally open contact of the J relay on the corresponding wind pressure measuring device 2; the J relays of the three-path wind pressure measuring device 2 are connected to two different DO switching value ports of the PLC controller 1, and the two J relays corresponding to the normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC controller 1.
As shown in FIG. 5, the J1 relay is connected to the DO1 port, the J2 relay and the J3 relay are connected to the DO2 port, the normally open contact J1-1 and the normally open contact J2-1 are connected to the DO3 port, and the normally open contact J3-1 is connected to the DO4 port.
EXAMPLE III
As shown in fig. 6 and 7, the present embodiment includes a four-way wind pressure measuring device 2 and a corresponding four-way purging device 4, two of four normally-open electromagnetic valves 24 of the four-way wind pressure measuring device 2 are respectively connected to the same switching value port of the PLC controller 1 through corresponding J relays, that is, in fig. 7, the two left normally-open electromagnetic valves 24 are respectively connected to a DO1 port through a J1 relay and a J2 relay, and the two right normally-open electromagnetic valves 24 are respectively connected to a DO2 port through a J3 relay and a J4 relay;
correspondingly, the normally closed electromagnetic valves 43 of the two blowing devices 4 are respectively connected to the same DO switching value port of the PLC controller 1 through the normally open contacts of the J relays in the two corresponding wind pressure measuring devices 2, and the normally closed electromagnetic valves 43 of the other two blowing devices 4 are respectively connected to the other DO switching value port of the PLC controller 1 through the normally open contacts of the J relays in the two corresponding wind pressure measuring devices 2. Specifically, in fig. 7, the two left normally closed solenoid valves 43 are connected to the DO3 port through the normally open contacts J1-1 of the J1 relay and the normally open contact J3-1 of the J3 relay respectively, and the two right normally closed solenoid valves 43 are connected to the DO4 port through the normally open contacts J2-1 of the J2 relay and the normally open contact J4-1 of the J4 relay respectively. And a D1 relay, a D2 relay, a D3 relay and a D4 relay are respectively arranged between the four normally closed electromagnetic valves 43 and the PLC controller 1.
The working principle of the embodiment is as follows:
after the control system operates to set purging time, the system enters gas isolation, the PLC controller 1 controls the J1 relay to be electrified through a DO1 port, the normally open electromagnetic valve 24 on the left side in the figure 7 is electrified and closed, the pipeline of the pressure leading pipe 22 is subjected to gas isolation, meanwhile, as the J1 relay is electrified, the corresponding normally open contact J1-1 is closed, and the electric circuit of the D1 relay corresponding to the DO3 port is in a waiting state for being electrified.
The PLC controller 1 sends out a D3 port connection instruction, the D1 relay is electrified, the left normally closed electromagnetic valve 43 in the figure 7 is connected, the purging gas is introduced into the corresponding pressure leading pipe 22, and the introduced gas is blown out from the left flowmeter 23 to purge the left pressure leading pipe 22; meanwhile, as the J3-1 contact is not closed, even if the DO3 port is connected, the D3 relay cannot be electrified, and the corresponding electromagnetic valve does not work.
After purging is finished, the DO3 port is disconnected, the D1 relay is powered off, the normally closed electromagnetic valve 43 is closed again, the DO1 port is disconnected, the J1 relay is powered off, the normally open electromagnetic valve 24 is normally opened again, and the flowmeter 3 is communicated with the transmitter 21 again.
The purging of other pressure leading pipelines is similar to the purging process of the left pipeline, which is not described herein, and due to point-to-point control, the four pressure leading pipes can respectively realize independent gas isolation and purging.
In addition, the system with the four-way wind pressure measuring device can be connected in the following way: as shown in fig. 8, the J relays of the four-way wind pressure measuring device 2 are respectively connected to four different DO switching value ports of the PLC controller 1, and the normally closed electromagnetic valves 43 of the four-way blowing device 4 are respectively connected to the same DO switching value port of the PLC controller 1 through the normally open contacts of the J relays of the four-way wind pressure measuring device 2.
Or, as shown in fig. 9, the normally closed solenoid valves 43 of the three-way purging device 4 are respectively connected to the same DO switching value port of the PLC controller 1 through the normally open contacts of the J relays in the three-way corresponding wind pressure measuring device 2, and the normally closed solenoid valve 43 of the other-way purging device 4 is connected to the other DO switching value port of the PLC controller 1 through the normally open contacts of the J relays in the corresponding wind pressure measuring device 2;
meanwhile, the J relays of the four-path wind pressure measuring device 2 are connected to three different DO switching value ports of the PLC controller 1, and three J relays corresponding to normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC controller 1, so as to realize point-to-point control. As shown in FIG. 9, a J1 relay is connected to a DO1 port, a J2 relay is connected to a DO2 port, a J3 relay and a J4 relay are connected to a D3 port, normally open contacts J1-1, J2-1 and J3-1 are connected to a DO4 port, and J4-1 is connected to a DO5 port.
This embodiment will originally need the condition of 8 ports to reduce to 5 even 4 ports, can realize the same effect simultaneously, can select relatively miniature PLC controller, reduces controller cost.
This scheme combines isolation relay circuit, when keeping apart through the relay in realizing between interior circuit and the outer circuit, utilize the normally open contact of relay, realize the point-to-point control under the limited condition of port quantity, make small-size PLC controller also can satisfy two basic ways and draw the pressure monitoring and sweep, three ways are drawn the pressure monitoring and are swept and four ways are drawn three kinds of basic application scenes that the pressure monitoring was swept, under the prerequisite that satisfies the control requirement, can make control system's cost reduction, reduce the volume of controller simultaneously, satisfy the miniaturized demand of instrument type equipment.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although PLC controller 1 is used more herein; a wind pressure measuring device 2; a transmitter 21; a pressure guiding pipe 22; a flow meter 23; a normally open solenoid valve 24; a purging device 4; a purge pipe 41; a compressed air pump 42; a normally closed electromagnetic valve 43; purge branch 44, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. A multi-path shared circuit structure of a DO port comprises a PLC (programmable logic controller) controller (1) and at least two paths of wind pressure measuring devices (2), wherein each path of wind pressure measuring device (2) comprises a pressure guiding pipe (22) and a normally open electromagnetic valve (24) connected in series on the pressure guiding pipe (22), and is characterized in that each path of wind pressure measuring device (2) further comprises a J relay connected between the normally open electromagnetic valve (24) and the PLC controller (1);
every wind pressure measuring device (2) all has to sweep device (4) all the way, and every sweeps device (4) all including being used for sweeping bleeder pipe (44) to corresponding pressure introduction pipe (22) sweeping gas all has on every sweeping bleeder pipe (44) connect in normally closed solenoid valve (43) of PLC controller (1), and two at least normally closed solenoid valve (43) through the normally open contact of J relay among the corresponding wind pressure measuring device connect in the same DO switching value port of PLC controller (1).
2. The multi-way circuit structure of DO ports according to claim 1, characterized in that J relays of different wind pressure measuring devices (2) are connected to the same or different DO switching value ports of the PLC controller (1), and are connected to the J relays of the same DO switching value port, and corresponding normally open contacts are connected to different DO switching value ports of the PLC controller (1).
3. The multi-path shared circuit structure of DO ports according to claim 2, characterized in that the structure comprises two paths of wind pressure measuring devices (2) and two corresponding paths of blowing devices (4), J relays of the two paths of wind pressure measuring devices (2) are connected to different DO switching value ports of the PLC controller (1), and normally closed electromagnetic valves (43) of the two paths of blowing devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through normally open contacts of the J relays in the two paths of corresponding wind pressure measuring devices (2).
4. The multi-way shared circuit structure of DO ports according to claim 2, characterized in that, the structure comprises three-way wind pressure measuring devices (2) and corresponding three-way blowing devices (4), J relays of the three-way wind pressure measuring devices (2) are connected at three different DO switching value ports of the PLC controller (1), and normally closed solenoid valves (43) of the three-way blowing devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through normally open contacts of the J relays in the three-way corresponding wind pressure measuring devices (2).
5. The multi-path shared circuit structure of DO ports according to claim 2, characterized in that the structure comprises three paths of wind pressure measuring devices (2) and corresponding three paths of blowing devices (4), wherein normally closed solenoid valves (43) of two paths of blowing devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through normally open contacts of J relays in two paths of corresponding wind pressure measuring devices (2), and normally closed solenoid valves (43) of the other path of blowing devices (4) are connected to the other DO switching value port of the PLC controller (1) through normally open contacts of J relays on the corresponding wind pressure measuring devices (2);
the J relays of the three-path wind pressure measuring device (2) are connected to two different DO switching value ports of the PLC (1), and the two J relays corresponding to the normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC (1).
6. The multi-path shared circuit structure of DO ports according to claim 2, characterized in that the structure comprises four-path wind pressure measuring devices (2) and corresponding four-path blowing devices (4), wherein normally closed electromagnetic valves (43) of two paths of blowing devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through normally open contacts of J relays in two paths of corresponding wind pressure measuring devices (2), and normally closed electromagnetic valves (43) of the other two paths of blowing devices (4) are respectively connected to the other DO switching value port of the PLC controller (1) through normally open contacts of J relays in two paths of corresponding wind pressure measuring devices (2);
j relays of the four-path wind pressure measuring device (2) are connected to two different DO switching value ports of the PLC (1), and two J relays corresponding to normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC (1).
7. The multi-way shared circuit structure of DO ports according to claim 2, characterized in that, the structure comprises four ways of wind pressure measuring devices (2) and corresponding four ways of blowing and sweeping devices (4), J relays of the four ways of wind pressure measuring devices (2) are respectively connected to four different DO switching value ports of the PLC controller (1), and normally closed solenoid valves (43) of the four ways of blowing and sweeping devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through normally open contacts of the J relays in the four ways of corresponding wind pressure measuring devices (2).
8. The DO port multiplexing circuit structure according to claim 2, wherein the structure comprises four wind pressure measuring devices (2) and corresponding four blowing devices (4), wherein the normally closed solenoid valves (43) of the three blowing devices (4) are respectively connected to the same DO switching value port of the PLC controller (1) through the normally open contacts of the J relays in the three corresponding wind pressure measuring devices (2), and the normally closed solenoid valve (43) of the other blowing device (4) is connected to the other DO switching value port of the PLC controller (1) through the normally open contacts of the J relays in the corresponding wind pressure measuring devices (2);
j relays of the four-path wind pressure measuring device (2) are connected to ports of three different DO switching values of the PLC (1), and three J relays corresponding to normally open contacts connected to the same DO switching value port are connected to different DO switching value ports of the PLC (1).
9. The DO port multiplexing circuit configuration as defined in claim 1 wherein each purge means (4) comprises a D-relay, each normally closed solenoid valve (43) being connected to said PLC controller (1) through a respective D-relay.
10. The DO port multiplexing circuit configuration as claimed in claim 1, wherein all purge branch pipes (44) are connected to a purge pipe (41), said purge pipe (41) has a compressed air pump (42), and said compressed air pump (42) is connected to said PLC controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120122901.3U CN214042101U (en) | 2021-01-18 | 2021-01-18 | Circuit structure for multi-path sharing of DO port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120122901.3U CN214042101U (en) | 2021-01-18 | 2021-01-18 | Circuit structure for multi-path sharing of DO port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214042101U true CN214042101U (en) | 2021-08-24 |
Family
ID=77346695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120122901.3U Active CN214042101U (en) | 2021-01-18 | 2021-01-18 | Circuit structure for multi-path sharing of DO port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214042101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112859729A (en) * | 2021-01-18 | 2021-05-28 | 杭州好一科技有限公司 | Circuit structure for multi-path sharing of DO port |
-
2021
- 2021-01-18 CN CN202120122901.3U patent/CN214042101U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112859729A (en) * | 2021-01-18 | 2021-05-28 | 杭州好一科技有限公司 | Circuit structure for multi-path sharing of DO port |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201867290U (en) | Air tightness testing device for automobile air-conditioning box | |
| CN214042101U (en) | Circuit structure for multi-path sharing of DO port | |
| CN105422921A (en) | Digital valve unit and combination and control method thereof | |
| CN105546162B (en) | A kind of Combined digital valve and its method of load port independent control | |
| CN112859729B (en) | Circuit structure for multi-path sharing of DO port | |
| CN200949439Y (en) | Oil pipe hanger device with cut-off valve | |
| CN102221101A (en) | Spool position detection feedback type bus-mastering electromagnetic container valve | |
| CN211290371U (en) | Automatic isolating valve and device for water leakage of air conditioner in IDC machine room | |
| CN211477495U (en) | Automatic pressure measuring point purging device | |
| CN101620212B (en) | Gas automatic quantitative sampling device | |
| CN203688141U (en) | Blowing system and blowing device of industrial control instrument sampling pipeline | |
| CN211874850U (en) | Hydraulic system with hand automatic switching function | |
| CN202284671U (en) | System special for isolating valve and system special for isolating one or more valves | |
| CN214488191U (en) | Universal type purging control system | |
| CN211403667U (en) | Maintenance skill training system | |
| CN208791181U (en) | Gas control valve open state monitoring device in PSA oxygenerator | |
| GB2346672A (en) | Valve testing apparatus and method | |
| CN102192836A (en) | Multifunctional comprehensive testing device for fire control hydraulic valve | |
| CN202008430U (en) | Multifunctional comprehensive testing device for hydraulic fire valve | |
| CN220187946U (en) | Alarm device for on-line detection of gas leakage of gas pressure reducing valve or pressure reducing valve bank | |
| CN103364154B (en) | Leak detection system | |
| CN214022421U (en) | Undisturbed reverse purging device for wind speed sampling pipeline | |
| CN216046089U (en) | Multi-purpose electric control interface system | |
| CN215980964U (en) | Electromagnetic valve group | |
| CN2095317U (en) | Electromagnetic combined valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |