CN219497188U - Liquid level control training equipment - Google Patents
Liquid level control training equipment Download PDFInfo
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- CN219497188U CN219497188U CN202320281780.6U CN202320281780U CN219497188U CN 219497188 U CN219497188 U CN 219497188U CN 202320281780 U CN202320281780 U CN 202320281780U CN 219497188 U CN219497188 U CN 219497188U
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- liquid level
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- water pump
- pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses liquid level control training equipment, which relates to the technical field of teaching equipment and comprises a closed loop formed by a water tank, a water pump and a liquid level tank which are sequentially connected through pipelines, a variable frequency motor connected with the water pump, a water pump constant pressure control mechanism, a ratio control mechanism, a liquid level adjusting mechanism, a branch pipeline arranged in the closed loop, and a manual adjusting valve arranged on the branch pipeline and used for realizing ratio control and liquid level adjustment. The utility model can realize the simulation of various liquid level control modes on a set of practical training equipment, so that students can learn the production conditions related to the practical training equipment as far as possible, realize the relevance of the principle, the structure, the installation and the like, and the equipment has a not-complicated structure, is relatively easy to learn, and is easier to cultivate and deepen the concept of the relevance operation in the brain.
Description
Technical Field
The utility model relates to the technical field of teaching equipment, in particular to liquid level control training equipment.
Background
Practice teaching is an important component of teaching work of high-office institutions, and is one of important ways for culturing practice ability and innovation ability of students. At present, automatic practical training equipment and equipment purchased by domestic professional academy mostly adopt scientific research type equipment, and the equipment generally comprises standard type equipment and non-standard type equipment.
Taking practical training of liquid level control as an example, the practical training content generally comprises a plurality of liquid level control modes such as water pump control, ratio control (namely, realizing the associated control of two or more parameters according to a certain proportion relation), liquid level adjustment (such as uniform control and cascade adjustment) and the like. However, the existing liquid level control practical training equipment has single function, fewer practical training modes of the same equipment, and cannot cover the listed practical training modes at the same time, so that students often cannot form an integral concept of an item in practical training, and the practical training effect is poor; or the training mode can be realized at the same time, but the equipment elements are more, the whole equipment structure is more complicated, the cost is higher, students learn more forcefully, the concepts of the related operation are difficult to cultivate and deepen in the brain, and the problem that the students are difficult to operate the equipment by hand quickly still exists after entering the factory.
Disclosure of Invention
The utility model aims to provide liquid level control practical training equipment, which solves the problems of single function, poor practical training effect, complex equipment structure and hard learning in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the liquid level control training device comprises a closed loop formed by a water tank, a water pump and a liquid level tank which are sequentially connected through pipelines, a variable frequency motor connected with the water pump, a constant pressure control mechanism of the water pump, a ratio control mechanism, a liquid level adjusting mechanism, a branch pipeline arranged in the closed loop, and a manual adjusting valve arranged on the branch pipeline and used for realizing ratio control and liquid level adjustment;
the constant pressure control mechanism of the water pump comprises a pressure transmitter connected with the water pump and a variable frequency speed regulator connected with the variable frequency motor and the pressure transmitter at the same time;
the ratio control mechanism comprises a third normally open flow valve arranged on the branch pipeline, a second normally open flow valve arranged in the closed loop, a third flow control mechanism connected with the third normally open flow valve, and a second flow control mechanism connected with the second normally open flow valve and the third flow control mechanism at the same time;
the liquid level regulating mechanism comprises a liquid level transmitter connected with the liquid level tank, a liquid level controller connected with the liquid level transmitter, a first flow control mechanism connected with the liquid level controller, and a first normally open flow valve connected with the first flow control mechanism and arranged in a closed loop.
Further, the first flow control mechanism, the second flow control mechanism and the third flow control mechanism have the same structure and are composed of a flow controller and a flow transmitter connected with the flow controller; the liquid level controller and the first normally open flow valve are both connected with a flow controller in the first flow control mechanism.
Still further, the present utility model also includes a fourth flow transmitter disposed on the closed loop and coupled to the flow controller in the first flow control mechanism for outputting a flow change disturbance.
Still further, the utility model also comprises a water pump outlet pressure protection mechanism; the outlet of the water pump is connected with the water tank through a return connection pipeline; the water pump outlet pressure protection mechanism comprises a normally closed pressure control valve arranged on the return connection pipeline, a pressure switch connected with the normally closed pressure control valve, and a pressure indication controller connected with the pressure switch, the variable frequency speed regulator and the pressure transmitter.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model is based on a closed loop formed by a water tank, a water pump and a liquid level tank, and various operation mechanisms such as constant pressure control, ratio control, liquid level regulation, water pump outlet pressure protection and the like are formed by arranging some instrument instruments (such as pressure, flow and liquid level indication and control instruments and valves) on the closed loop and correlating the closed loop in many aspects, so that simulation of various liquid level control modes (such as constant pressure control of the water pump, water pump outlet pressure protection, ratio control, uniform, cascade, feedforward and cascade three-impulse regulation of the liquid level tank and the like) can be realized by correlating the corresponding instrument instruments, students can know the production conditions actually correlated with the closed loop as far as possible, and realize the correlations in the aspects of principle, structure, installation and the like. Meanwhile, the utility model skillfully realizes the simulation of various liquid level control modes by using relatively fewer instrument instruments, not only has a non-complex equipment structure, but also is easier to get on hand when students learn, and is easier to cultivate and deepen the concept of the related operation in the brain, thereby providing a good front foundation for the rapid operation of the equipment after the students enter the factory, and shortening the adaptation time to the factory.
Drawings
Fig. 1 is a schematic diagram of a structure for implementing the present utility model.
Wherein, the spare part names that the reference numerals correspond are:
1-liquid level tank, 2-water tank, 3-water pump, 4-variable frequency motor, 5-variable frequency speed regulator, 6-pressure indication controller, 7-pressure transmitter, 8-normally closed pressure control valve, 9-pressure switch, 10-branch pipeline, 11-manual regulating valve, 12-third normally open type flow valve, 13-second normally open type flow valve, 14-liquid level transmitter, 15-liquid level controller, 16-first normally open type flow valve, 17-fourth flow transmitter.
Detailed Description
The utility model will be further illustrated by the following description and examples, which include but are not limited to the following examples.
Examples
The embodiment provides a liquid level control training device, which can realize the training of various operation modes such as constant pressure control of a water pump, ratio control, liquid level adjustment (including uniform, cascade, feedforward and cascade three-impulse adjustment of a liquid level tank), water pump outlet pressure protection and the like. As shown in fig. 1, the liquid level control training device comprises a closed loop circuit formed by a water tank 2, a water pump 3 and a liquid level tank 1 which are sequentially connected through pipelines, a variable frequency motor 4 connected with the water pump 3, a branch pipeline 10 arranged in the closed loop circuit, and a manual regulating valve 11 arranged on the branch pipeline 10. And the outlet of the water pump 3 is connected with the water tank 2 through a return connection pipeline.
Besides the components, the liquid level control training device provided by the embodiment comprises a water pump constant pressure control mechanism, a ratio control mechanism, a liquid level adjusting mechanism and a water pump outlet pressure protection mechanism, wherein:
the constant pressure control mechanism of the water pump comprises a pressure transmitter 7 connected with the water pump 3 and a variable frequency speed regulator 5 connected with the variable frequency motor 4 and the pressure transmitter 7.
The water pump outlet pressure protection mechanism comprises a normally closed pressure control valve 8 arranged on a return connection pipeline, a pressure switch 9 connected with the normally closed pressure control valve 8, and a pressure indication controller 6 connected with the pressure switch 9, the variable frequency speed regulator 5 and the pressure transmitter 7.
The ratio control mechanism includes a third normally open type flow valve 12 provided on the branch pipe 10, a second normally open type flow valve 13 provided in a closed loop, a third flow control mechanism connected to the third normally open type flow valve 12, and a second flow control mechanism connected to both the third flow control mechanism and the second normally open type flow valve 13.
The liquid level regulating mechanism comprises a liquid level transmitter 14 connected with the liquid level tank 1, a liquid level controller 15 connected with the liquid level transmitter 14, a first normally open flow valve 16 arranged in a closed loop, and a first flow control mechanism. In this embodiment, the first flow control mechanism, the second flow control mechanism and the third flow control mechanism have the same structure and are each composed of one flow controller and a flow transmitter connected to the flow controller (wherein, the first flow control mechanism is composed of a flow transmitter FT101 and a flow controller FIC101, the second flow control mechanism is composed of a flow transmitter FT102 and a flow controller FIC102, and the third flow control mechanism is composed of a flow transmitter FT103 and a flow controller FIC 103). The liquid level controller 15 is connected to the flow controller (FIC 101) in the first flow control mechanism together with the first normally open flow valve 16.
And, the liquid level regulating mechanism further includes a fourth flow transmitter 17 provided on the closed loop and connected to the flow controller (FIC 101) in the first flow control mechanism for outputting a flow variation disturbance.
The following describes how the device implements the simulation of water pump constant pressure control, water pump outlet pressure protection, ratio control, and liquid level regulation.
The following are parameters of the relevant devices:
1. control object
(1) The medium to be controlled is water, the working pressure is 150KPa, and the working temperature is normal temperature.
(2) The pipelines in the equipment are connected with the pipelines, the pipelines are connected with the equipment and the transmitter by flanges.
(3) The material of the pipeline is determined by the medium, and DN50 is adopted in the material of the pipeline in the embodiment.
(4) The liquid level tank is provided with a temperature indicator (TI 107), a glass tube liquid level meter (TG 106), a site pressure meter (PG 108), a remote pressure data display (PI 107) and the like.
(5) The volumes of the liquid level tank and the water tank meet practical training requirements, and the volume of the liquid level tank is required to meet the water supply of the whole system, and at least more than 20% of the residual volume exists. The installation position of the water tank drain valve should meet the requirement of draining all water in the liquid level tank.
2. Variable frequency motor and water pump requirements
(1) The variable frequency motor is powered at 220V.
(2) The control station has motor protection function.
(3) The variable frequency motor has a remote start-stop function.
(4) And the power and the load capacity of the motor meet the practical training requirement.
(5) The motor should provide a motor operating status signal.
(6) The water pump adopts a centrifugal pump.
(7) The variable frequency motor and the water pump lift should meet the normal operation of the device, and the balance of 20 percent is provided.
(8) An interlock logic element (labeled "I" in fig. 1) is added to the variable frequency motor.
3. Junction box
And a junction box is configured on site for signal access of a site instrument. Each junction box can be connected with 24 signal wires. The number of the junction boxes is required to meet the signal access requirement of all field instruments.
4. Transmitter
(1) The same brand is used for the similar meters on site, so that the replacement and maintenance are convenient.
(2) The transmitter selects a meter with the HART protocol, so that configuration and debugging are facilitated.
(3) Orifice plate flow meters should take into account the requirements of the straight tube segment.
(4) The measurement accuracy is not lower than 0.5 level.
(5) The transmitters are all installed by adopting brackets.
5. Regulating valve
(1) The electromagnetic valve of the valve should be safely fixed.
(2) The valve positioner should be mounted on the valve body.
(3) The valve positioner is two-wire and supports the HART protocol.
(4) A valve calculation book is provided.
6. Flow measuring unit
(1) The pore plate is adopted for measurement, and the pressure taking mode is flange pressure taking.
(2) An orifice plate flowmeter calculation book is provided.
1. Constant pressure control of water pump
The single-loop regulating system consists of a pressure transmitter 7 (namely PT 103) and a variable frequency speed regulator 5 (namely SIC 104). The detection of the outlet pressure of the water pump is completed by a pressure transmitter 7, and the rotation speed adjustment of the variable frequency motor 4 (namely MP-101) is completed by a variable frequency speed regulator 5, so that the constant pressure control of the water pump is realized.
2. And protecting the outlet pressure of the water pump.
After detection, feedback and control of the pressure transmitter 7, the pressure indication controller 6 (i.e. PIC 103) and the pressure switch 8 (i.e. PS-103), water at the outlet of the water pump 3 is returned to the water tank 2 (i.e. V-101) through the pressure control valve 9 (i.e. PV-103), so that the pressure of the outlet of the water pump is prevented from being ultrahigh, and the protection function of the pressure of the outlet of the water pump is realized.
3. Ratio control
When the manual regulating valve 11 (i.e. HV 104) is fully opened, under the action of the second normally open flow valve 13 (i.e. FV-102) and the third normally open flow valve 12 (i.e. FV-103), the flow controller FIC102 and the flow controller FIC103 can form open-loop and closed-loop ratio control, which simulates the ratio control in production.
3. Liquid level adjustment
1. Uniform control
When the manual regulating valve 11 is closed, the liquid level transmitter 14 (namely LT 102), the liquid level controller 15 (namely LIC 102) and the first normally open flow valve 16 (namely FV 101) form a single loop, and the liquid level transmitter and the first normally open flow valve cooperate with the flow controller FIC101 to realize uniform liquid level control of the liquid level tank 1 (namely V-102).
2. Cascade adjustment
The manual regulating valve 11 is closed, the flow transmitter FT101, the flow controller FIC101 and the first normally open flow valve 16 form a secondary loop, the liquid level transmitter 14 and the liquid level controller 15 form a main loop, and liquid level cascade regulation is carried out on the liquid level tank 1.
3. Feedforward + Cascade three impulse adjustment
The manual regulating valve 11 is closed, the flow transmitter FT101, the flow controller FIC101 and the first normally open flow valve 16 form a secondary loop, the liquid level transmitter 14 and the liquid level controller 15 form a primary loop, and the change of the output flow of the fourth flow transmitter 17 (namely FT 107) is used as interference to form three impulses of feedforward and cascade, so that the liquid level of the liquid level tank 1 is regulated.
In summary, the utility model can realize the simulation of various liquid level control modes on a set of practical training equipment, so that students can learn the production conditions related to the practical liquid level control modes as far as possible, and realize the relevance in the aspects of principle, structure, installation and the like.
The present utility model can be preferably implemented according to the above embodiments.
Claims (4)
1. The practical training equipment for liquid level control comprises a closed loop formed by a water tank (2), a water pump (3) and a liquid level tank (1) which are sequentially connected through pipelines, and a variable frequency motor (4) connected with the water pump (3), and is characterized by further comprising a water pump constant pressure control mechanism, a ratio control mechanism, a liquid level adjustment mechanism, a branch pipeline (10) arranged in the closed loop, and a manual adjustment valve (11) arranged on the branch pipeline (10) and used for realizing ratio control and liquid level adjustment;
the constant pressure control mechanism of the water pump comprises a pressure transmitter (7) connected with the water pump (3) and a variable frequency speed regulator (5) connected with the variable frequency motor (4) and the pressure transmitter (7) at the same time;
the ratio control mechanism comprises a third normally open flow valve (12) arranged on the branch pipeline (10), a second normally open flow valve (13) arranged in the closed loop, a third flow control mechanism connected with the third normally open flow valve (12), and a second flow control mechanism connected with the second normally open flow valve (13) and the third flow control mechanism at the same time;
the liquid level regulating mechanism comprises a liquid level transmitter (14) connected with the liquid level tank (1), a liquid level controller (15) connected with the liquid level transmitter (14), a first flow control mechanism connected with the liquid level controller (15), and a first normally open flow valve (16) connected with the first flow control mechanism and arranged in a closed loop.
2. The practical training device for liquid level control according to claim 1, wherein the first flow control mechanism, the second flow control mechanism and the third flow control mechanism are identical in structure and each consist of a flow controller and a flow transmitter connected with the flow controller; the liquid level controller (15) and the first normally open flow valve (16) are both connected with a flow controller in the first flow control mechanism.
3. A level control training apparatus according to claim 2, further comprising a fourth flow transmitter (17) arranged on the closed loop and connected to the flow controller in the first flow control mechanism for outputting a disturbance of the flow variation.
4. A level control training apparatus according to any one of claims 1 to 3, further comprising a water pump outlet pressure protection mechanism; the outlet of the water pump (3) is connected with the water tank (2) through a return connection pipeline; the water pump outlet pressure protection mechanism comprises a normally closed pressure control valve (8) arranged on a return connection pipeline, a pressure switch (9) connected with the normally closed pressure control valve (8), and a pressure indication controller (6) connected with the pressure switch (9), the variable-frequency speed regulator (5) and the pressure transmitter (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320281780.6U CN219497188U (en) | 2023-02-22 | 2023-02-22 | Liquid level control training equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320281780.6U CN219497188U (en) | 2023-02-22 | 2023-02-22 | Liquid level control training equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219497188U true CN219497188U (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320281780.6U Active CN219497188U (en) | 2023-02-22 | 2023-02-22 | Liquid level control training equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219497188U (en) |
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2023
- 2023-02-22 CN CN202320281780.6U patent/CN219497188U/en active Active
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