CN218471171U - Constant-pressure water supply equipment and system - Google Patents
Constant-pressure water supply equipment and system Download PDFInfo
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- CN218471171U CN218471171U CN202222491249.XU CN202222491249U CN218471171U CN 218471171 U CN218471171 U CN 218471171U CN 202222491249 U CN202222491249 U CN 202222491249U CN 218471171 U CN218471171 U CN 218471171U
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Abstract
The application provides a constant pressure water supply equipment and system. The constant pressure water supply apparatus includes: the pressure detection device is used for detecting the real-time water pressure in the pipeline and outputting a water pressure signal; the relay device is electrically connected with each water pump in the water pump set respectively and is used for controlling the start and stop of each water pump in the water pump set; the water supply control device is used for receiving the real-time water pressure, generating a relay control instruction and outputting the relay control instruction; the mode switching device is used for switching on or off the electric connection between the relay device and the water supply control device; the display device is electrically connected with the water supply control device and is used for displaying the real-time water pressure; and the interaction device is electrically connected with the water supply control device and is used for receiving the preset water pressure input by the user. The equipment is convenient for operators to obtain real-time water pressure and adjust the preset water pressure.
Description
Technical Field
The application relates to the technical field of water supply control, in particular to constant-pressure water supply equipment and system.
Background
Among the prior art, the mill adopts the power frequency to supply water, and that is to say relies on the power frequency power supply to make the water pump continuously supply water, and when the water consumption of production is little, outlet conduit water pressure can influence the life of water pump excessively high. Although the water pump can be regulated by the frequency converter, the following disadvantages exist: the water pressure of the frequency converter is set fussy, no professional is provided in a small factory, and the preset water pressure of the frequency converter is difficult to adjust; the water pressure in the pipeline can only be obtained through the manometer, because the manometer setting is on the pipeline, the pipeline has the certain distance apart from water supply equipment's switch board, and the operating personnel of being not convenient for obtains real-time water pressure, and the operating personnel of being not convenient for more refers to real-time water pressure and adjusts water supply equipment's water pressure.
Therefore, it is desirable to design a constant pressure water supply device and system that is convenient for the operator to obtain real-time water pressure and adjust the pressure.
Disclosure of Invention
The utility model provides a constant pressure water supply equipment and system, through the water pressure of display device real-time display pipeline to through the default water pressure of interactive installation receipt user input, be convenient for the user obtains real-time water pressure and carries out pressure adjustment.
The purpose of the application is realized by adopting the following technical scheme:
in a first aspect, the present application provides a constant pressure water supply apparatus for supplying water at a constant pressure using a water pump set and a pipe, the constant pressure water supply apparatus comprising:
the pressure detection device is used for detecting the real-time water pressure in the pipeline and outputting a water pressure signal;
the relay device is electrically connected with each water pump in the water pump set respectively and is used for controlling the starting and stopping of each water pump in the water pump set;
the water supply control device is used for receiving the water pressure signal, generating a relay control instruction and outputting the relay control instruction;
the mode switching device is arranged between the relay device and the water supply control device and is used for switching on or off the electric connection between the relay device and the water supply control device;
the display device is electrically connected with the water supply control device and is used for displaying the real-time water pressure;
and the interaction device is electrically connected with the water supply control device and is used for receiving the preset water pressure input by the user.
The technical scheme has the advantages that the water supply control device receives the water pressure signal obtained by the pressure detection device through detecting the pipeline in real time, and displays the real-time water pressure value indicated by the water pressure signal through the display device; the water supply control device compares real-time water pressure in the pipeline represented by the real-time water pressure signal with preset water pressure, and then controls the rotating speed and the water discharge of the water pump set through the relay device so as to realize the balance of the water pressure in the pipeline; the relay device and the water supply control device are selectively switched on or off through the mode switching device, so that the requirements of users in different scenes are met.
In conclusion, the user can conveniently switch the water supply mode through the mode switching device, and the learning cost of the user is low; through the display device, a user can conveniently obtain and adjust the water pressure condition in the pipeline in real time; through the interaction device, the user can adjust preset water pressure and other parameters by simple training, and the constant-pressure water supply equipment is convenient and quick to popularize in a factory. Therefore, the constant-pressure water supply equipment is convenient for a user to obtain the real-time water pressure and is convenient for the user to adjust the preset water pressure by referring to the real-time water pressure.
In some optional embodiments, the water supply control device comprises a frequency converter.
The technical scheme has the beneficial effects that the constant-pressure water supply with low cost can be realized through the PID control function of the frequency converter; the same constant-pressure water supply can be realized by using a PID unit outside the frequency converter, and the configurability is stronger.
In some optional embodiments, the water supply control device further comprises:
and the PLC module is electrically connected with the frequency converter and is used for receiving the water pressure signal, generating a frequency converter control instruction and outputting the frequency converter control instruction to the frequency converter.
The beneficial effects of this technical scheme lie in, through the combined action of PLC module and converter, the configurability of PLC module is stronger, makes water supply control device be applicable to the water pump package of a plurality of water pumps, and intelligent degree is than higher.
In some optional embodiments, the frequency converter is further configured to generate a frequency converter fault signal and output the frequency converter fault signal to the PLC module;
the PLC module is also used for generating a display control signal and sending the display control signal to the display device;
the display device is also used for displaying the fault code corresponding to the display control signal.
The technical scheme has the beneficial effects that when the frequency converter breaks down, the PLC module can know the fault condition in the first time, the PLC module can display the fault type (or fault code) of the frequency converter through the display device, an operator can conveniently and timely acquire the fault reason, the difficulty in solving the fault is reduced, the fault processing time is shortened, and the stability of the water supply control device is improved.
In some optional embodiments, the pressure detection device comprises:
the remote transmission pressure gauge is arranged in the pipeline and used for detecting the real-time water pressure in the pipeline;
and the pressure regulator is respectively electrically connected with the remote transmission pressure meter and the PLC module and is used for processing the water pressure signal and outputting the processed water pressure signal to the PLC module.
The technical scheme has the beneficial effects that the remote transmission pressure gauge can be arranged at the position of the water outlet pipeline of the water pump set, the measured pipeline water pressure is more accurate, and the effect of remotely detecting the pipeline water pressure is realized. The pressure regulator can set up in near water supply control device, and pressure regulator and teletransmission manometer phase-match carry out the correction processing to the water pressure signal that teletransmission manometer acquireed through pressure regulator to water pressure signal output to water supply control device (PLC module) after will handling has improved the precision of the water pressure signal that water supply control device obtained, makes constant pressure water supply equipment realize the constant pressure water supply function of high accuracy.
In some optional embodiments, the water supply control device further comprises:
the first indicating circuit is electrically connected with the PLC module and used for receiving a fault indicating signal generated by the PLC module and giving a fault alarm.
This technical scheme's beneficial effect lies in, can carry out more effectual malfunction alerting through setting up first indicating circuit, makes operating personnel in time learn the trouble and takes place and carry out troubleshooting, improves water supply control device's water supply stability.
In some optional embodiments, the constant pressure water supply apparatus further comprises:
the liquid level detection device is used for detecting the real-time liquid level of the water storage area to obtain a liquid level signal and outputting the liquid level signal to the PLC module;
the water supply control device further includes:
and the second indicating circuit is electrically connected with the PLC module and is used for receiving the water shortage indicating signal generated by the PLC module and giving a water shortage alarm.
The beneficial effect of this technical scheme lies in, can know the liquid level condition in the region of retaining accurately, in real time through liquid level detection device. When the water storage area liquid level is lower than the liquid level that sets up in advance, the PLC module can reduce water pump running frequency, the quantity of operation water pump based on the liquid level signal that acquires in real time. Meanwhile, the second indicating circuit is used for receiving the water shortage indicating signal generated by the PLC module, and therefore effective water shortage alarming can be achieved. Different indicating circuits are selected for water shortage alarm and fault alarm, and the alarm type can be distinguished by field management personnel.
In some optional embodiments, the relay device comprises:
the power frequency relay module is used for switching on or switching off the electric connection between the circuit breaker and each water pump in the water pump set;
and the frequency conversion relay module is used for switching on or switching off the electric connection between the frequency converter and each water pump in the water pump set.
The technical scheme has the beneficial effects that when the mode conversion device enables the relay device and the water supply control device to be switched off, the circuit breaker (power frequency power supply) supplies power for any water pump in the water pump set through the power frequency relay module. When the mode switching device enables the relay device and the water supply control device to be conducted, the water supply control device acts on the frequency conversion relay module through a relay control instruction, and then the start and stop of each water pump in the water pump set are controlled. The relay devices are respectively arranged according to the corresponding water pump group driving modes and are not mutually influenced, even if one water pump group driving mode breaks down, the relay module can also supply water by using a power frequency (or frequency conversion) relay module and adopting another water pump group driving mode, and the stability of constant-pressure water supply equipment and a constant-pressure water supply system is improved.
In some alternative embodiments, the water pump set includes a plurality of water pumps;
the power frequency relay module further comprises:
the switch group comprises a plurality of switches, the switches are electrically connected with the water pumps in a one-to-one correspondence mode, and each switch is used for controlling the starting and stopping of the corresponding water pump.
The beneficial effects of this technical scheme lie in, can control opening of water pump respectively through the switch and stop, when PLC or converter maintain or maintain, ensure normal water supply.
In a second aspect, the present application provides a constant pressure water supply system, comprising any one of the above constant pressure water supply apparatus and a water pump set, wherein the water pump set comprises at least 1 water pump.
Drawings
The present application is further described below with reference to the drawings and examples.
Fig. 1 shows a block diagram of a constant pressure water supply system provided in an embodiment of the present application.
Fig. 2 shows a block diagram of a constant pressure water supply apparatus according to an embodiment of the present application.
Fig. 3 shows a block diagram of a constant pressure water supply apparatus according to an embodiment of the present application.
Fig. 4 is a partial schematic diagram illustrating a main control circuit of a constant pressure water supply apparatus according to an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating a wiring principle of a programmable controller according to an embodiment of the present application.
The figure is as follows: 10. a constant pressure water supply system; 100. a constant pressure water supply device; 200. a water pump set; 110. a pressure detection device; 120. a relay device; 130. a water supply control device; 140. a mode switching device; 150. a display device; 160. an interaction device; 170. a liquid level detection device; PLC1, programmable controller; RN1, a frequency converter; KM1, a first alternating current contactor; KM2 and a second alternating current contactor; KM3 and a third alternating current contactor; KM4, a fourth AC contactor; KA1, a first relay; KA2 and a second relay; FR1, a first motor protector; FR2, a second motor protector; m1, a first water pump; m2, a second water pump; SAC1, a change-over switch; QF1, a circuit breaker.
Detailed Description
The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "corresponding" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
System embodiment
Referring to fig. 1, fig. 1 is a block diagram illustrating a constant pressure water supply system according to an embodiment of the present disclosure.
The constant pressure water supply system 10 includes a constant pressure water supply apparatus 100 and a water pump set 200, and the water pump set 200 includes not less than 1 water pump.
Wherein, the same outlet pipe can be used by multiple water pumps in the water pump group 200, and the number of the water pumps in the water pump group 200 is, for example, 2, 5, 10.
The embodiment of the application does not limit the type of the water pump, and the water pump can be a clean water pump, a sewage pump, a submersible pump, a fire pump, a corrosion-resistant pump and the like.
The constant pressure water supply apparatus 100 will be described in detail below.
Apparatus embodiment
Referring to fig. 2, fig. 2 is a block diagram illustrating a constant pressure water supply apparatus according to an embodiment of the present invention.
The constant pressure water supply apparatus for supplying water at constant pressure using a water pump set and a pipe includes a pressure detecting device 110, a relay device 120, a water supply control device 130, a mode switching device 140, a display device 150, and an interaction device 160.
The pressure detection device 110 is used for detecting real-time water pressure in the pipeline and outputting a water pressure signal;
the relay device 120 is electrically connected with each water pump in the water pump group respectively, and the relay device 120 is used for controlling the starting and stopping of each water pump in the water pump group;
the water supply control device 130 is used for receiving the water pressure signal, generating a relay control instruction and outputting the relay control instruction;
the mode switching device 140 is disposed between the relay device 120 and the water supply control device 130, and the mode switching device 140 is used for turning on or off the electrical connection between the relay device 120 and the water supply control device 130;
the display device 150 is electrically connected with the water supply control device 130, and the display device 150 is used for displaying the real-time water pressure;
the interactive device 160 is electrically connected to the water supply control device 130, and the interactive device 160 is used for receiving a preset water pressure input by a user.
It can be understood that the water supply control device 130 receives the water pressure signal obtained by the pressure detection device 110 detecting the pipeline in real time, and displays the value of the real-time water pressure indicated by the water pressure signal through the display device 150; the water supply control device 130 compares the real-time water pressure in the pipeline represented by the real-time water pressure signal with a preset water pressure, and then acts on the relay device 120 through a relay control instruction to control the operation number, the rotating speed and the water discharge of a water pump group so as to realize the balance of the water pressure in the pipeline; the relay device 120 and the water supply control device 130 are selectively switched on or off by the mode switching device 140 to meet the requirements of users in different scenes (for example, maintenance or repair of the water supply control device).
In conclusion, the user can conveniently switch the water supply mode through the mode switching device 140, and the learning cost of the user is low; through the display device 150, a user can conveniently obtain and adjust the water pressure condition in the pipeline in real time; through the interaction device, the user can adjust preset water pressure and other parameters by simple training, and the constant-pressure water supply equipment is convenient and quick to popularize in a factory. Therefore, the constant-pressure water supply equipment is convenient for a user to obtain the real-time water pressure and is convenient for the user to adjust the preset water pressure by referring to the real-time water pressure.
The pressure detection device 110 can be used to detect the real-time water pressure of the water outlet pipe of the water pump set, and the water pressure of the water outlet pipe can reflect the water pressure condition of the water outlet end.
The user can be an operator of a factory of the constant-pressure water supply equipment, and can also be a designer and an installation and debugging person of the constant-pressure water supply equipment.
The water pressure signal is not limited in the embodiment of the application, and is an analog quantity signal of 4-20mA, for example.
The preset water pressure is not limited in the examples of the present application, and is, for example, 4MPa (megapascal), 1.6MPa, or 1.2MPa.
The mode switching device 140 may include any one of a changeover switch and a knife switch to realize switching of electrical connection between the relay device 120 and the water supply control device 130 (switching on and off, it can be considered that on refers to a short-circuit operation between the relay device 120 and the water supply control device 130, and off refers to a disconnection operation between the relay device 120 and the water supply control device 130).
The display device 150 is, for example, any one of a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) based display, a flat panel display, a curved screen, a television device, a Cathode Ray Tube (CRT), and a touch screen display.
The interaction means 160 is, for example, any one of a mouse, a keyboard, a microphone assembly, and a camera assembly.
When the interactive device 160 is a mouse, the jog and drag operations of the user on the preset pressure in the display device can be accepted, for example, the user performs a mouse left click operation on the preset pressure through a mouse left key, the preset pressure is increased by 0.1MPa, the user performs a mouse right click operation on the preset pressure through a mouse right key, and the preset pressure is decreased by 0.1MPa.
When the interaction means is a camera assembly, the camera assembly for example comprises a camera and an image recognition chip, the camera and the image recognition chip being communicatively connected. The camera is used for collecting image information in real time and outputting the image information to the image recognition chip, the image recognition chip can store an image recognition model for example, and the image recognition model is used for carrying out image recognition on the received image information to obtain an image recognition result, and the image recognition result can be classified into increase, decrease or no operation on preset water pressure for example. For example, the camera assembly acquires the acquired image information of the left and right waving hands of the user in real time, and performs image recognition on the received image information by using the image recognition model, wherein the obtained image recognition result is that the preset water pressure is reduced, for example, the preset pressure can be reduced by 0.1MPa; the camera assembly acquires collected image information of a user waving his hand up and down in real time, and performs image recognition on the received image information by using the image recognition model, wherein the obtained image recognition result is 'increasing the preset water pressure', for example, the preset pressure can be increased by 0.1MPa; the camera assembly acquires the acquired image information of the user except for swinging the hand up and down and swinging the hand left and right in real time, and the image recognition model is used for carrying out image recognition on the received image information, so that the obtained image recognition result is 'no operation', and the preset pressure is unchanged.
When the interaction means is a microphone assembly, the microphone assembly for example comprises a microphone and a speech recognition chip, the microphone and the speech recognition chip being communicatively connected. The microphone is used for collecting voice information in real time and outputting the voice information to the voice recognition chip, the voice recognition chip can store a voice recognition model, the voice recognition model is used for carrying out voice recognition on the received voice information to obtain a voice recognition result, and the voice recognition result can be classified into increase, decrease or no operation on preset water pressure. For example, the microphone component acquires voice information which is sent by a user and is reduced by 0.6MPa of preset water pressure in real time, and performs voice recognition on the received voice information by using a voice recognition model to obtain a voice recognition result of reducing the preset water pressure by 0.6 MPa; the microphone assembly acquires voice information which is sent by a user and is increased by 1MPa of preset water pressure in real time, and voice recognition is carried out on the received voice information by using a voice recognition model to obtain a voice recognition result of increasing 1MPa of preset water pressure; the microphone component acquires voice information which is sent by a user and does not comprise 'reduction' and 'increase' in real time, voice recognition is carried out on the received voice information by using the voice recognition model, the obtained voice recognition result is 'no operation', and the preset pressure is not changed.
In one specific application, the display device 150 and the interaction device 160 may be combined into a touch screen display for displaying the water pressure in real time and inputting a preset water pressure.
In some alternative embodiments, the water supply control device 130 may include a frequency converter.
Therefore, the constant-pressure water supply with low cost can be realized through the PID control function of the frequency converter; the same constant-pressure water supply can be realized by using a PID unit outside the frequency converter, and the configurability is stronger.
The frequency converter is not limited in the embodiments of the present application, and for example, is any one of a V/f control frequency converter, a slip frequency control frequency converter, and a vector control frequency converter.
It can be understood that the PID control function can be realized by using the PID unit of the frequency converter itself, the interactive device 160 can be a keyboard panel or an input terminal matched with the frequency converter, the display device 150 can be an LCD display electrically connected with the frequency converter, etc., the water pressure signal obtained by the real-time detection of the pressure detection device 110 is fed back to the control end of the frequency converter as the feedback signal of the PID unit, and the PID adjustment is performed inside the frequency converter to change the power supply frequency output by the frequency converter to the water pump set.
When the water consumption increases, water pressure reduces and is less than and predetermines water pressure in the pipeline, and the converter improves the frequency conversion, makes current water pump rotational speed rise, increases the water supply. When the water consumption is reduced, the water pressure in the pipeline is reduced, the frequency of the water pump set can be reduced by the frequency converter, and the rotating speed of the water pump is reduced, so that the water pressure in the pipeline is constant.
Similarly, the constant of the water pressure in the pipeline can also be realized by using the PID unit in the PLC module instead of the PID unit of the frequency converter. The realization of water pressure constancy using a PID unit in a PLC module is explained in detail below.
In some optional embodiments, the water supply control device 130 may further include:
and the PLC module is electrically connected with the frequency converter and is used for receiving the water pressure signal, generating a frequency converter control instruction and outputting the frequency converter control instruction to the frequency converter.
When the mode switching means 140 turns on the relay means 120 and the water supply control means 130, constant pressure water supply is realized by means of the water supply control means 130. The PLC module receives the water pressure signal obtained by the pressure detection device 110, and generates a frequency converter control instruction by using a PID control function of the PLC module itself; the frequency converter adjusts the output frequency according to the frequency converter control instruction, and acts on the water pump set through the relay device 120 so as to adjust the water discharge of the water pump set and realize stable constant-pressure water supply. Meanwhile, the PLC module may also adjust the number of water pumps put into operation in the water pump group through a relay control command acting on the relay device 120 according to the feedback of the water pressure signal.
From this, through the linkage effect of PLC module and converter, the configurability of PLC module is stronger, makes water supply control device 130 be applicable to the water pump assembly of a plurality of water pumps, and intelligent degree is than higher.
The PLC module may include a PLC Controller (Programmable Logic Controller, PLC for short).
It can be understood that the PID control function can be realized by using the PID unit in the PLC module, the interactive device and the display device 150 can be a touch display screen integrated together, the touch display screen can display (the value of) the real-time water pressure, and can receive the preset water pressure input by the user, and the user experience is good. The touch display screen and the PLC module can be in communication connection in an RS232 communication mode and an RS485 communication mode. The water pressure signal obtained by the real-time detection of the pressure detection device 110 is fed back to the control end of the PLC module as a feedback signal of the PID unit in the PLC module, and after the PID calculation is performed inside the PLC module, a control instruction of the frequency converter is generated and transmitted to (the communication port of) the frequency converter, so as to change the output frequency of the frequency converter, thereby controlling the rotation speed of the water pump and achieving the effect of making the water pressure in the pipeline constant.
The frequency converter and the PLC module can be in communication connection through a serial communication technology, for example, the serial communication technology can comprise various field bus modes including standard RS485, PROFIdrive and LonWorks communication technologies. As an example, the serial communication connection of the frequency converter and the PLC module can be realized at low cost through RS485 communication technology.
Meanwhile, a plurality of output control terminals of the PLC module may be connected to the relay device 120, and start and stop of each water pump in the water pump group is controlled by the relay control command.
In specific application, when the water consumption is increased, the water pressure in the pipeline is reduced and is lower than the preset water pressure, the PLC module receives a water pressure signal after the water pressure is reduced, compares the water pressure signal with the preset water pressure, and obtains and outputs an adjusted frequency converter control instruction to the frequency converter after PID calculation so as to increase the output frequency of the frequency converter, thereby improving the rotating speed and the water discharge amount of the currently operated water pump; when the output frequency of the frequency converter is increased and the real-time water pressure cannot approach the preset water pressure, the PLC module acts on the relay device 120 through a relay control instruction to enable a new water pump in the water pump group to be put into operation; when the water consumption is reduced and the like, the water pressure in the pipeline is increased, the output frequency of the frequency converter can be reduced, so that the rotating speed of the water pump is reduced, or the number of the water pumps which are put into operation is reduced, so that the water supply quantity of the water pump set is reduced, and the constancy of the water pressure in the pipeline is realized.
In some optional embodiments, the frequency converter is further configured to generate a frequency converter fault signal and output the frequency converter fault signal to the PLC module;
the PLC module is also used for generating a display control signal and sending the display control signal to the display device;
the display device is also used for displaying the fault code corresponding to the display control signal.
From this, when the converter broke down, the trouble condition can be learnt by the PLC module the very first time, and the PLC module can show the fault code (or the fault type) of converter through display device 150, and the operating personnel of being convenient for in time acquires the trouble reason, has reduced the solution degree of difficulty of trouble, has reduced the time of fault handling, has improved water supply control device 130's stability.
In some optional embodiments, the pressure detecting device 110 may include:
the remote transmission pressure gauge is arranged in the pipeline and used for detecting the real-time water pressure in the pipeline;
and the pressure regulator is respectively electrically connected with the remote transmission pressure meter and the PLC module and is used for processing the water pressure signal and outputting the processed water pressure signal to the PLC module.
Therefore, the remote-transmission pressure gauge can be arranged at the position of the water outlet pipeline of the water pump set, more accurate pipeline water pressure is measured, and the effect of remotely detecting the pipeline water pressure is realized. The pressure regulator can set up in near of water supply controlling means 130, pressure regulator and teletransmission manometer phase-match, the water pressure signal who acquires the teletransmission manometer through the pressure regulator is rectified and is handled, and the water pressure signal output to water supply controlling means 130 (PLC module) after will handling, the precision of the water pressure signal that has improved water supply controlling means 130 and obtained, the water pressure signal that will obtain is used for and predetermines the water pressure and carries out the comparison, make constant pressure water supply equipment realize the function that the constant pressure of high accuracy supplied water.
The embodiments of the present application are not limited to the selection of the remote pressure gauge, such as YTZ-100 and YTZ-150, and the pressure regulator, such as AI-708E. Generally, a slide wire resistance transmitter is arranged in a remote pressure gauge, so that a measured value (real-time water pressure) can be transmitted to a secondary instrument far away from measurement in the form of an electric signal, and centralized detection and remote control are realized. In addition, the remote pressure gauge can indicate pressure through a dial and a pointer on the spot so as to facilitate on-site work inspection.
In some optional embodiments, the water supply control device 130 may further include:
the first indicating circuit is electrically connected with the PLC module and used for receiving a fault indicating signal generated by the PLC module and giving a fault alarm.
The water supply control device 130 is mostly wet, and needs to be operated for a long time, and the internal electrical components of the water supply control device 130 are prone to malfunction. Therefore, when the PLC module has software failure or hardware failure, the failure lamp of the PLC module can warn the failure; and can carry out more effective malfunction alerting through setting up first indicating circuit, make operating personnel in time learn the trouble and carry out troubleshooting, improve the water supply stability of water supply controlling means 130.
Wherein, the first indicating circuit can comprise one or more of a warning light, a buzzer and a loudspeaker. When the PLC module breaks down, the fault output end of the PLC module outputs a fault signal, and the first indicating circuit gives a fault alarm under the triggering of the fault output signal.
Referring to fig. 3, fig. 3 is a block diagram illustrating a structure of still another constant pressure water supply apparatus provided in an embodiment of the present application.
In some optional embodiments, the constant pressure water supply apparatus may further include:
the liquid level detection device 170, the liquid level detection device 170 is used for detecting the real-time liquid level of the water storage area to obtain a liquid level signal, and outputting the liquid level signal to the PLC module;
the water supply control device 130 may further include:
and the second indicating circuit is electrically connected with the PLC module and is used for receiving the water shortage indicating signal generated by the PLC module and giving a water shortage alarm.
Therefore, the liquid level condition of the water storage area can be accurately known in real time through the liquid level detection device 170. When retaining regional liquid level was less than preset's liquid level, the PLC module is based on the water shortage pilot signal that the liquid level signal that acquires in real time generated, can reduce the quantity of water pump running frequency, operation water pump. Meanwhile, the second indicating circuit is used for receiving the water shortage indicating signal generated by the PLC module, and therefore effective water shortage alarming can be achieved. Different indicating circuits are selected for water shortage alarm and fault alarm, and the alarm type can be distinguished by field management personnel.
The liquid level detecting device 170 may be any one of a liquid level sensor and a float level gauge. The liquid level detection device 170 is disposed in the water storage area for detecting the water level in real time. The impoundment area can be a reservoir, a cistern, or the like.
In some alternative embodiments, the relay device 120 may include:
the power frequency relay module is used for switching on or switching off the electric connection between the circuit breaker and each water pump in the water pump set;
and the frequency conversion relay module is used for switching on or switching off the electric connection between the frequency converter and each water pump in the water pump set.
Thus, when the mode switching device causes the relay device 120 and the water supply control device 130 to be turned off, the circuit breaker (power frequency supply) supplies power to any water pump in the water pump set through the power frequency relay module. When the mode switching device 140 switches on the relay device 120 and the water supply control device 130, the water supply control device 130 acts on the variable frequency relay module through the relay control command, thereby controlling the start and stop of each water pump in the water pump group. The relay device 120 is respectively arranged according to the corresponding water pump set driving modes and does not influence each other, even if one water pump set driving mode breaks down, the power frequency (or frequency conversion) relay module can be used for supplying water by adopting the other water pump set driving mode, and the stability of the constant-pressure water supply equipment and the constant-pressure water supply system is improved.
The power frequency relay module may include an ac contactor, a relay, etc. for power frequency power supply. The variable frequency relay module may include an ac contactor, a relay, etc. for driving the water pump group by the water supply control device 130. The input of circuit breaker is used for communicateing the power frequency power supply, and the output of circuit breaker is connected the ac contactor's of power frequency relay module input, and the ac contactor's of power frequency relay module output and water pump group are connected, can also set up motor protector between ac contactor's the output and the water pump group, avoid the potential safety hazard such as the electric current too big that the long-time operation of the water pump in the water pump group produced.
Power frequency is understood to mean, among other things, the nominal frequency in Hertz (HZ) used by the power generation, transmission, transformation and distribution equipment of the power system and by the industrial and domestic electrical equipment. The power frequency in the embodiment of the present application may refer to a rated frequency of 50 Hz.
In some alternative embodiments, the water pump assembly includes a plurality of water pumps;
the power frequency relay module can further comprise:
the switch group comprises a plurality of switches, the switches are electrically connected with the water pumps in a one-to-one correspondence mode, and each switch is used for controlling the starting and stopping of the corresponding water pump.
The power frequency relay module can also comprise a plurality of relays, a plurality of alternating current contactors, a plurality of switches and a plurality of water pumps in one-to-one correspondence, when an operator operates a switch, the switch controls the alternating current contactors through the corresponding relays, and then the corresponding water pumps are controlled to be started and stopped.
Therefore, the water pump can be controlled to be started or stopped through the switch, and normal water supply is ensured when the PLC or the frequency converter is maintained.
The number of the plurality of water pumps is, for example, 3, 5, or 8.
Referring to fig. 4 and 5, fig. 4 is a partial schematic view illustrating a main control circuit of a constant pressure water supply apparatus according to an embodiment of the present application. Fig. 5 is a schematic diagram illustrating a wiring principle of a programmable controller according to an embodiment of the present application.
In one embodiment, a constant pressure water supply system includes a pressure detecting device 110, a relay device 120, a water supply control device 130, a mode switching device 140, a display device 150, an interaction device 160, and a water pump set. The water supply control device 130 comprises a programmable controller PLC1 and a frequency converter RN1; the relay device 120 includes first to fourth ac contactors KM1 to KM4, a first relay KA1, a second relay KA2, a first motor protector FR1, and a second motor protector FR2; the water pump group at least comprises a first water pump M1 and a second water pump M2; mode switching means 140 includes a changeover switch SAC1; the display device 150 and the interaction device 160 are integrated touch display screens. The input end of the breaker QF1 is used for connecting the power supply of 380V alternating current.
The model of the programmable controller PLC1 is CPM1A-20CDR-A, the model of the frequency converter RN1 is RNB3000, the models of the relays (KA 1 and KA 2) are JZC3-22d, the model of the change-over switch SAC1 is LW5-16/1, the models of the alternating current contactors (KM 1 to KM 4) are any one of CJ20 series alternating current contactors, the models of the motor protectors (FR 1 and FR 2) are any one of JRS2 series motor protectors, the model of the breaker QF1 is any one of CM1 series breakers, and the models of the touch display screens are NT31C-ST143B-EV3, B07SS411 and NT631C-ST 153B-3.
When an operator selects an automatic control mode through a change-over switch SAC1 (so that a frequency conversion relay module is respectively connected with the frequency converter and the water pump set, the second relay KA2 is conducted to enable the first alternating current contactor KM1 and the third alternating current contactor KM3 to be respectively conducted, one ends of the first alternating current contactor KM1 and the third alternating current contactor KM3 are respectively connected with the frequency converter RN1, and the other ends of the first alternating current contactor KM1 and the third alternating current contactor KM3 are connected with the first water pump M1 and the second water pump M2. When an operator selects an automatic control mode through the change-over switch SAC1, the programmable logic controller PLC1 receives a water pressure signal of an output pipeline in real time through the pressure detection device, generates a frequency converter control instruction to the frequency converter RN1, the frequency converter RN1 adjusts the output frequency according to the frequency converter control instruction, and acts on the first water pump M1 and the second water pump M2 through the first alternating current contactor KM1 and the third alternating current contactor KM3 which are in a conduction state. Meanwhile, the programmable controller PLC1 can increase or decrease the number of water pumps by controlling the on/off of at least one of the first ac contactor KM1 and the third ac contactor KM 3. In the whole process, an operator can check the real-time water pressure of the water outlet pipeline based on the touch display screen and can adjust the preset water pressure through the touch display screen.
When programmable controller PLC1 or converter RN1 maintained or maintained, when operating personnel can select the manual control mode through change over switch SAC1 (make power frequency relay module respectively with the circuit breaker the water pump group electricity is connected), first relay KA1 switches on to make second AC contactor KM2, fourth AC contactor KM4 switch on, circuit breaker QF1 is connected to the one end of second AC contactor KM2, fourth AC contactor KM4, and second AC contactor KM2, fourth AC contactor KM 4's the other end connects first water pump M1, second water pump M2 through first motor protector FR1, second motor protector FR2 respectively, makes the water pump start.
While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The constant pressure water supply apparatus for supplying water at constant pressure using a water pump set and a pipe, comprising:
the pressure detection device is used for detecting the real-time water pressure in the pipeline and outputting a water pressure signal;
the relay device is electrically connected with each water pump in the water pump set respectively and is used for controlling the starting and stopping of each water pump in the water pump set;
the water supply control device is used for receiving the water pressure signal, generating a relay control instruction and outputting the relay control instruction;
the mode switching device is arranged between the relay device and the water supply control device and is used for switching on or off the electric connection between the relay device and the water supply control device;
the display device is electrically connected with the water supply control device and is used for displaying the real-time water pressure;
and the interaction device is electrically connected with the water supply control device and is used for receiving the preset water pressure input by a user.
2. The constant pressure water supply apparatus as claimed in claim 1, wherein the water supply control means includes a frequency converter.
3. The constant pressure water supply apparatus as claimed in claim 2, wherein the water supply control means further comprises:
and the PLC module is electrically connected with the frequency converter and is used for receiving the water pressure signal, generating a frequency converter control instruction and outputting the frequency converter control instruction to the frequency converter.
4. The constant pressure water supply apparatus according to claim 3, wherein the inverter is further configured to generate an inverter fault signal and output the inverter fault signal to the PLC module;
the PLC module is also used for generating a display control signal and sending the display control signal to the display device;
the display device is also used for displaying the fault code corresponding to the display control signal.
5. The constant pressure water supply apparatus as claimed in claim 3, wherein the pressure detecting means comprises:
the remote transmission pressure gauge is arranged in the pipeline and used for detecting the real-time water pressure in the pipeline;
and the pressure regulator is respectively electrically connected with the remote transmission pressure meter and the PLC module and is used for processing the water pressure signal and outputting the processed water pressure signal to the PLC module.
6. The constant pressure water supply apparatus as claimed in claim 3, wherein the water supply control means further comprises:
the first indicating circuit is electrically connected with the PLC module and used for receiving a fault indicating signal generated by the PLC module and giving a fault alarm.
7. The constant pressure water supply apparatus as claimed in claim 3, further comprising:
the liquid level detection device is used for detecting the real-time liquid level of the water storage area to obtain a liquid level signal and outputting the liquid level signal to the PLC module;
the water supply control device further includes:
and the second indicating circuit is electrically connected with the PLC module and is used for receiving the water shortage indicating signal generated by the PLC module and giving a water shortage alarm.
8. The constant pressure water supply apparatus as claimed in claim 1, wherein the relay means comprises:
the power frequency relay module is used for switching on or switching off the electric connection between the circuit breaker and each water pump in the water pump set;
and the frequency conversion relay module is used for switching on or off the electric connection between the frequency converter and each water pump in the water pump set.
9. The constant pressure water supply apparatus as claimed in claim 8, wherein the water pump group includes a plurality of water pumps;
the power frequency relay module further comprises:
the switch group comprises a plurality of switches, the switches are electrically connected with the water pumps in a one-to-one correspondence mode, and each switch is used for controlling the starting and stopping of the corresponding water pump.
10. A constant pressure water supply system comprising the constant pressure water supply apparatus as claimed in any one of claims 1 to 9 and a water pump set, the water pump set comprising not less than 1 water pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222491249.XU CN218471171U (en) | 2022-09-20 | 2022-09-20 | Constant-pressure water supply equipment and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222491249.XU CN218471171U (en) | 2022-09-20 | 2022-09-20 | Constant-pressure water supply equipment and system |
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| CN218471171U true CN218471171U (en) | 2023-02-10 |
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| CN202222491249.XU Active CN218471171U (en) | 2022-09-20 | 2022-09-20 | Constant-pressure water supply equipment and system |
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