CN203503225U

CN203503225U - Pressure controlled frequency conversion water pump training system

Info

Publication number: CN203503225U
Application number: CN201320139416.2U
Authority: CN
Inventors: 徐旭; 杭刚; 王京; 史晓飞
Original assignee: TIANJIN LONGZHOU TECHNOLOGY INSTRUMENT Co Ltd
Current assignee: Tianjin Longzhou Industrial Equipment Ltd By Share Ltd
Priority date: 2013-03-26
Filing date: 2013-03-26
Publication date: 2014-03-26
Anticipated expiration: 2023-03-26

Abstract

A pressure controlled frequency conversion water pump training system comprises a main frame module, an unreeling apparatus module, a conveyance roller way module, a tension force acquisition module, a rolling apparatus module and a PLC control module. The main frame module is used for arranging other modules of the training system; the unreeling apparatus module achieves adjustment at the horizontal direction; the conveyance roller way module is used for adjusting the operation direction of a PE tension force film and achieves adjustment at the horizontal direction; the tension force acquisition module is connected to the left upper side of the main frame module, and the tension force sensor arranged between a tension detection roller and a frame section bar is employed for detecting the tension force of the material on the tension detection roller and feeding the detection result back to a controller to control unreeling; the rolling apparatus module is connected to the right lower side of the main frame module to achieve adjustment at the horizontal direction; and the PLC control module is arranged on a mesh board and is adjustable at both horizontal and vertical directions.

Description

Pressure is controlled variable frequency pump experience system

Technical field

The utility model relates to a kind of teaching instrument, particularly a kind of frequency converter actual training device towards Application of frequency conversion technique.

Background technology

Current frequency converter real training instrument is to carry out the experiment of Proof-Of Principle type mostly, to the applied environment of frequency converter with and auxiliary facility do not put into practice, can not meet the complicated real work needs that student will face in following production practices.

Specifically, current frequency converter real training instrument comprises that PLC programming, variable frequency control, safe distribution, closed-loop control, HMI configuration, sensing technology, pipeline are built, man-machine interaction, motor drag, analog quantity aperture is controlled, PID controls, the application of electric adjustment technology; But can not meet the Frequency Conversion Design needs of the concrete physical object that will face in following production practices.

Utility model content

The purpose of this utility model is to provide a kind of frequency converter actual training device towards this concrete physical object of fluid pressure, and this system has contained diffused silicon pressure transmitter, supersonic non-contact fluid level transmitter, magnetic floating-ball level switch, electric actuator etc.; By controlling hydraulic pressure, deeply understand effect and the principle of frequency converter.

The purpose of this utility model is achieved in that pressure control variable frequency pump experience system, it is characterized in that, comprise: the water storage device being formed by upper water box [1], water check valve [2], level switch [3], fluid level transmitter [8] and lower header [7], wherein water check valve [2] and level switch [3] are loaded on upper water box [1] sidewall; The supply channel being formed by water pipe and joint thereof, solenoid valve [4], motorized adjustment ball valve [5], water pump [6], pressure unit [9], wherein water pump [6] is connected to upper water box [1] by water inlet pipe, described water inlet pipe is divided into three tunnels, be connected to respectively solenoid valve [4], motorized adjustment ball valve [5] and water check valve [2], pressure unit [9] is loaded on the interface on water pipe sidewall, and upper water box [1] is received lower header 7 by rising pipe; Fluid level transmitter [8] is loaded on lower header [7] top; The overflow back water device being formed by water pipe and joint thereof, level switch [3], wherein level switch [3] is loaded on lower header [7] sidewall; Mesh plate on control desk is equipped with PLC[11 on [10]] and the frequency converter [12] that is attached thereto, frequency converter is also electrically connected with water pump; Described level switch [3], solenoid valve [4], fluid level transmitter [8], pressure unit [9] respectively with PLC[11] electrical connection.

Compared with prior art, the beneficial effects of the utility model are: utilize the multiple control modes of PLC to frequency converter, realize the control of frequency converter to hydraulic pressure, in addition by building actual constant pressure water supply platform, have more intuitive, the real operation of student more can excite their learning interest.

Accompanying drawing explanation

Fig. 1 is overall diagram of the present utility model.Wherein: [1] upper water box, [2] water check valve, [3] level switch, [4] solenoid valve, [5] motorized adjustment ball valve, [6] water pump, [7] lower header, [8] fluid level transmitter, [9] pressure unit.

Fig. 2 is PLC control module and host computer configuration Local map.Wherein: [10] mesh plate, [11] PLC, [12] frequency converter.

Embodiment

Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail:

Referring to accompanying drawing 1, Fig. 2, pressure is controlled variable frequency pump experience system, it is characterized in that, comprise: the water storage device being formed by upper water box [1], water check valve [2], level switch [3], fluid level transmitter [8] and lower header [7], wherein water check valve [2] and level switch [3] are loaded on upper water box [1] sidewall; The supply channel being formed by water pipe and joint thereof, solenoid valve [4], motorized adjustment ball valve [5], water pump [6], pressure unit [9], wherein water pump [6] is connected to upper water box [1] by water inlet pipe, described water inlet pipe is divided into three tunnels, be connected to respectively solenoid valve [4], motorized adjustment ball valve [5] and water check valve [2], pressure unit [9] is loaded on the interface on water pipe sidewall, and upper water box [1] is received lower header 7 by rising pipe; Fluid level transmitter [8] is loaded on lower header [7] top; The overflow back water device being formed by water pipe and joint thereof, level switch [3], wherein level switch [3] is loaded on lower header [7] sidewall; Mesh plate on control desk is equipped with PLC[11 on [10]] and the frequency converter [12] that is attached thereto, frequency converter is also electrically connected with water pump; Described level switch [3], solenoid valve [4], fluid level transmitter [8], pressure unit [9] respectively with PLC[11] electrical connection; Thereby play the effect of controlling current.

Described upper water box [1] is provided with five water delivering orifices, one of them water delivering orifice is located at sidewall, by rising pipe and joint access lower header [7] thereof, other four water delivering orifices are located at the bottom of upper water box [1], by the rising pipe with water check valve [2], are connected on lower header [7].

Described fluid level transmitter [8] is contactless.

Described lower header [7] is loaded on foot rest.

Described level switch [3] is apart from upper water box [1] bottom surface 250～300mm.

Described PLC model is S7-300.

During operation, the level switch [3] that is installed on upper water box [1] sidewall is used for detecting the water level of water.After water pump [6] starts, water in upper water box [1] will be drawn in pipeline, and the vertical duct connecing via water pump [6] and outlet thereof, the pressure unit [9] that is arranged on pipeline sidewall is the pressure in signal piping, vertical duct is divided into two-way in the horizontal direction, the solenoid valve [4] of leading up to access lower header [7], the motorized adjustment ball valve [5] of separately leading up to access lower header [7] can be respectively by the aperture size of artificial and automatic control mode control valve.In lower header [7], the liquid level of institute's injected water is detected by the fluid level transmitter [8] that is arranged on its end face, if liquid level is out of hand,, when it surpasses electrode solution bit switch [3], solenoid valve [4] carries out active overflow by unlatching, makes water flow back to lower header [7] by active overflow passage.Above active overflow passage, also have passive overflow passage, when control and situation that protective device all lost efficacy under, water will flow back to lower header [7] by this pipeline, avoid overflowing.By changing the running frequency of water pump [6], can regulate the discharge capacity of water, then coordinate the adjusting of valve opening can realize the flow control of water and the control of line pressure.By PLC, control motorized adjustment ball valve [5] and solenoid valve [4], manually control water check valve [2], pressure unit [9], with controlled pressure, is reflected on display screen, and last frequency converter [12] automatic pressure is adjusted to desired value.

Claims

1. pressure is controlled variable frequency pump experience system, it is characterized in that, comprise: the water storage device being formed by upper water box [1], water check valve [2], level switch [3], fluid level transmitter [8] and lower header [7], wherein water check valve [2] and level switch [3] are loaded on upper water box [1] sidewall; The supply channel being formed by water pipe and joint thereof, solenoid valve [4], motorized adjustment ball valve [5], water pump [6], pressure unit [9], wherein water pump [6] is connected to upper water box [1] by water inlet pipe, described water inlet pipe is divided into three tunnels, be connected to respectively solenoid valve [4], motorized adjustment ball valve [5] and water check valve [2], pressure unit [9] is loaded on the interface on water pipe sidewall, and upper water box [1] is received lower header 7 by rising pipe; Fluid level transmitter [8] is loaded on lower header [7] top; The overflow back water device being formed by water pipe and joint thereof, level switch [3], wherein level switch [3] is loaded on lower header [7] sidewall; Mesh plate on control desk is equipped with PLC[11 on [10]] and the frequency converter [12] that is attached thereto, frequency converter is also electrically connected with water pump; Described level switch [3], solenoid valve [4], fluid level transmitter [8], pressure unit [9] respectively with PLC[11] electrical connection.

2. pressure according to claim 1 is controlled variable frequency pump experience system, it is characterized in that, described upper water box [1] is provided with five water delivering orifices, one of them water delivering orifice is located at sidewall, by rising pipe and joint access lower header [7] thereof, other four water delivering orifices are located at the bottom of upper water box [1], by the rising pipe with water check valve [2], are connected on lower header [7].

3. pressure according to claim 1 is controlled variable frequency pump experience system, it is characterized in that, described PLC model is S7-300.

4. pressure according to claim 1 is controlled variable frequency pump experience system, it is characterized in that, described fluid level transmitter [8] is contactless.

5. pressure according to claim 1 is controlled variable frequency pump experience system, it is characterized in that, described lower header [7] is loaded on foot rest.

6. pressure according to claim 1 is controlled variable frequency pump experience system, it is characterized in that, described level switch [3] is apart from upper water box [1] bottom surface 250～300mm.