CN110411932B - Pressure fluctuation simulation system and method of constant pressure system - Google Patents
Pressure fluctuation simulation system and method of constant pressure system Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 25
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 154
- 230000001105 regulatory effect Effects 0.000 claims abstract description 65
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 55
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- 239000013589 supplement Substances 0.000 claims description 15
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000009469 supplementation Effects 0.000 claims description 3
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- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
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- 230000006641 stabilisation Effects 0.000 description 5
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- 238000011156 evaluation Methods 0.000 description 4
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- 230000036632 reaction speed Effects 0.000 description 2
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Abstract
The invention discloses a pressure fluctuation simulation system of a constant pressure system, which comprises: supply pressure unit, steady voltage unit and monitoring unit. The pressure supply unit comprises a pressure tank, a water storage tank, a first water pipe and a second water pipe, the pressure tank is communicated with the bottom end of the water storage tank through the first water pipe, a pressure pump is arranged on the first water pipe to pump water in the water storage tank into the pressure tank to supply water pressure to the pressure tank, and the top of the pressure tank is communicated with the water storage tank through the second water pipe; the second water pipe is provided with a pressure regulating valve for regulating the water pressure of the pressure supply unit, the pressure supply unit is in a pressure maintaining state when the pressure regulating valve is closed, the pressure regulating valve opens water in the pressure tank to flow to the water storage tank from the second water pipe, the pressure of the pressure tank is reduced, and the water pressure of the pressure supply unit is regulated by regulating the opening and closing of the pressure regulating valve and regulating the flow of the pressure regulating valve.
Description
Technical Field
The invention relates to the field of concrete detection, in particular to a simulation system of a constant pressure system and a method for simulating water pressure fluctuation.
Background
The concrete impermeability tester is used for detecting the waterproof performance of hardened concrete and determining the impermeability grade of the hardened concrete, the concrete permeability test is directly used for evaluating the permeability of a concrete test piece, and the influence of the concrete permeability evaluation process cannot be ignored. Because the test piece has permeability, the pressure impermeability instrument must have the pressure compensation function for stable test, so that pressure fluctuation must exist in the pressure maintaining process of the impermeability instrument. The permeability resistance is the most important performance in concrete durability, the impermeability instrument is special equipment for permeability evaluation, the equipment has wide application range, long service time, large market reserve and more manufacturing units, the performance evaluation of the existing permeability instrument is single and is only limited to the verification and calibration of a pressure gauge, and the permeability resistance instrument is lack of effective detection means to cause the mixing of active equipment and torpedo and uneven quality.
In the pressure maintaining time period of the impermeability instrument, the pressure of the pressure stabilizing unit is reduced due to normal leakage caused by the permeation of high-pressure water into the test piece, the impermeability instrument starts the pressure pump to supplement pressure for ensuring the stability of the pressure, and the pressure fluctuation caused by repeated leakage and pressure supplement under normal conditions is called impermeability instrument pressure fluctuation. The pressure fluctuation of the impermeability instrument is different from the characteristics of pressure accuracy, sleeve mold size and the like, and can be directly measured by a direct or comparative measurement method, the operation mechanism of the pressure fluctuation is complex, and the impermeability instrument is the integral and systematic characteristics of the impermeability instrument and cannot be visually represented. However, the pressure fluctuation of the impermeability instrument has the greatest influence on the performance of the concrete test piece evaluated by the impermeability instrument.
The conventional method for testing the volatility of the impermeability instrument mainly comprises a test piece test and a die holder test, but the test piece test method is adopted, and in the actual operation process, the test piece operation process is extremely complicated, time-consuming and labor-consuming, and the expected effect is difficult to achieve. The method for sleeving the die holder is adopted, the leakage main body of the impermeability instrument in the detection process is a concrete test piece, the metal test piece is used in the method, the pressure gauge is installed on the test piece, and the metal material has no water seepage capability, so that a pressure system of the impermeability instrument has no leakage unit, no leakage phenomenon and no significance for measuring volatility.
Therefore, the equipment which can accurately test the pressure fluctuation of the impermeability instrument and is simple to operate needs to be provided, powerful technical support is provided for improving the evaluation of the impermeability instrument detection performance and the improvement of the system performance, and the technical problem which needs to be solved in the field is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pressure fluctuation simulation system of a constant pressure system, which is used for verifying the pressure compensation performance of the constant pressure system and monitoring the compensation pressure response speed of the constant pressure system.
According to an aspect of the present invention, there is provided a pressure fluctuation simulation system of a constant pressure system, including: the device comprises a pressure supply unit, a pressure stabilizing unit and a monitoring unit; the pressure stabilizing unit supplements pressure to the pressure supply unit when the pressure of the pressure supply unit fluctuates, and the monitoring unit is used for recording the pressure fluctuation value of the pressure stabilizing unit when the pressure supply unit supplements the pressure to the pressure supply unit and recording the time required by the pressure stabilizing unit to complete pressure supplementation. The pressure supply unit comprises a pressure tank, a water storage tank, a first water pipe and a second water pipe, the water storage tank is communicated with the bottom end of the pressure tank through the first water pipe, a pressure pump is arranged on the first water pipe to pump water in the water storage tank into the pressure tank, and the top of the pressure tank is communicated with the water storage tank through the second water pipe. The second water pipe is provided with a pressure regulating valve used for regulating the water pressure of the pressure supply unit, the water pressure of the pressure tank is regulated by regulating the opening and closing of the pressure regulating valve and regulating the flow of the pressure regulating valve, the pressure in the pressure tank presents a pressure rising or pressure maintaining state according to the water inlet condition of the first water pipe when the pressure regulating valve is closed, the water in the pressure tank flows to the water storage tank from the second water pipe when the pressure regulating valve is opened, and the pressure in the pressure tank is reduced.
Alternatively, the pressurizing pump of the pressure supply unit is connected to a driving motor, the driving motor supplies pressure to the pressurizing pump to pump water in the water storage tank into the pressure tank when in a driving state, and the pressurizing pump stops pumping water when in a closing state.
Optionally, the pressure stabilizing unit comprises a pressure sensor arranged on the second water pipe and a pressure stabilizing measurement and control device in signal connection with the pressure sensor, the pressure stabilizing measurement and control device is in control connection with the driving motor and comprises an input end, the input end is used for inputting a target pressure value and a preset deviation value, and the pressure sensor detects the water pressure of the pressure tank in real time and converts the water pressure into an electric signal to be transmitted to the pressure stabilizing measurement and control device. After the pressure sensor detects that the water pressure of the pressure supply unit drops to a preset deviation value, the pressure stabilizing measurement and control device sends a pressure compensation signal to the driving motor, and the driving motor starts to supply pressure to a pressure pump of the pressure supply unit so as to pump the water in the water storage tank into the pressure tank to supplement the pressure to the pressure supply unit. The pressure sensor detects that the water pressure of the pressure supply unit rises to a target pressure value, the pressure stabilizing measurement and control device sends a pressure stop compensation signal to the driving motor, the driving motor stops supplying pressure to the pressure pump of the pressure supply unit, and the pressure supply unit enters a pressure maintaining state.
Optionally, the monitoring unit comprises a pressure monitoring device and a standard sensor arranged on the second water pipe and used for measuring the water pressure of the pressure tank, the standard sensor measures the pressure of the pressure tank in real time and transmits the pressure to the pressure monitoring device, and the pressure monitoring device is used for recording the pressure fluctuation value of the pressure tank when the pressure stabilizing unit supplements the pressure to the pressure supply unit and the pressure supplementing time required by the pressure stabilizing unit to pressurize the pressure of the pressure tank to the target pressure value.
Optionally, the pressure monitoring device of the monitoring unit is in control connection with the pressure regulating valve. When the standard sensor detects that the pressure of the pressure tank is maintained at the target pressure value and does not change any more, the pressure monitoring device sends a control signal to the pressure regulating valve to control the pressure regulating valve to open, and the water in the second water pipe flows into the water storage tank to reduce the pressure in the pressure tank. When the standard sensor detects that the pressure in the pressure tank stops decreasing and shows an increasing trend, the pressure monitoring device sends a control signal to the pressure regulating valve to control the pressure regulating valve to close, and the water in the second water pipe stops flowing out of the water storage tank.
Optionally, the pressure monitoring device of the monitoring unit comprises a first display panel, and the first display panel displays the opening and closing states of the pressure regulating valve, the flow value when the pressure regulating valve is in the opening state, and the pressure value monitored by the standard sensor in real time.
Alternatively, the water storage tank is disposed below the pressure tank in the horizontal direction, and the water in the water storage tank enters the pressure tank to be pressurized by the pressurizing pump.
According to another aspect of the present invention, there is provided a method of simulating water pressure fluctuation in a pressure fluctuation simulation system of a constant pressure system, comprising the steps of: a) the driving motor is started until the pressure of the pressure tank of the pressure supply unit enters a pressure stabilizing stage; b) opening the pressure regulating valve to enable the second water pipe to continuously discharge part of water to enable the pressure in the pressure tank to continuously decrease until the pressure stabilizing unit starts the driving motor to supplement pressure to the pressure pump, and closing the pressure regulating valve; c) recording the difference value P between the pressure value measured by the pressure sensor and the target pressure value maintained in the pressure stabilizing stage when pressure compensation is startedⅠ(ii) a d) When the pressure of the pressure supply unit enters the pressure stabilizing stage again, the pressure supplementing time t from the start of pressurization to the end of pressurization of the driving motor is recordedⅠ(ii) a e) Repeating the steps b) to d) m times after every 5min, and sequentially recording the pressure difference value and the pressure supplementing time; f) calculating actual pressure fluctuation deviation value of pressure supply unit
(ii) a g) Calculating the time taken by the pressure stabilizing unit from the start of pressurization to the end of pressurization
。
Optionally, m is a positive integer of 3-5.
Optionally, calculating the actual pressure fluctuation deviation value in step f)
Is expressed by the formula:
alternatively, step g) calculates the time taken from pressurization to the end of pressurization
The formula of (1) is:
wherein the content of the first and second substances,
the pressure fluctuation simulation system of the constant pressure system controls the water pressure in the pressure tank through the driving motor and the pressure regulating valve, so that the water pressure in the pressure tank fluctuates up and down, the unstable condition of the water pressure is further simulated, and the bearing capacity and the reaction speed of the constant pressure system on pressure fluctuation are evaluated according to the pressure deviation and the pressure supplementing time when the pressure stabilizing system starts to supplement pressure.
The pressure fluctuation simulation system of the constant pressure system simulates the pressure fluctuation of the constant pressure system and provides technical support for the evaluation of the pressure compensation capability of the constant pressure system.
The pressure fluctuation simulation system can dynamically monitor and analyze the walking capacity and the reaction speed of the constant pressure system, effectively reduce the troubleshooting time of faults caused by abnormal fluctuation of the pressure of the constant pressure system, and improve the working efficiency.
The pressure fluctuation simulation system disclosed by the invention is simple in structure, convenient to operate and accurate in measurement result, and is particularly suitable for performance detection of pressure fluctuation of a concrete impermeability instrument.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a pressure fluctuation simulation system of the constant pressure system of the present invention;
FIG. 2 is a flow chart of a simulation test performed by the pressure fluctuation simulation system of the constant pressure system of the present invention;
FIG. 3 is a time-pressure curve of the pressure fluctuation simulation system of the constant pressure system of the present invention;
fig. 4 is a partial enlarged view of position a of the graph of fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, in the embodiments and examples of the present application, the feature vectors may be arbitrarily combined with each other without conflict.
As shown in fig. 1, a pressure fluctuation simulation system of a constant pressure system includes: supply pressure unit, steady voltage unit and monitoring unit. The pressure stabilizing unit supplements pressure to the pressure supply unit when the pressure of the pressure supply unit fluctuates, and the monitoring unit is used for recording the pressure fluctuation value of the pressure stabilizing unit when the pressure supply unit supplements the pressure to the pressure supply unit and recording the time required by the pressure stabilizing unit to complete pressure supplementation.
The pressure supply unit comprises a pressure tank 01, a water storage tank 02, a first water pipe 03 and a second water pipe 04, the bottom end of the pressure tank 01 is communicated with the bottom end of the water storage tank 02 through the first water pipe 03, a pressure pump 05 is arranged on the first water pipe 03 to pump water in the water storage tank 02 into the pressure tank 01 to supply water pressure to the pressure tank 01, and the top of the pressure tank 01 is communicated with the water storage tank 02 through the second water pipe 04. The second water pipe 04 is provided with a pressure regulating valve 11 for regulating the water pressure of the pressure supply unit, the pressure supply unit is in a pressure maintaining state when the pressure regulating valve 11 is closed, the pressure regulating valve 11 opens the water in the pressure tank 01 to flow from the second water pipe 04 to the water storage tank 02, the pressure of the pressure tank 01 is reduced, and the water pressure of the pressure supply unit is regulated by regulating the opening and closing of the pressure regulating valve 11 and regulating the flow rate of the pressure regulating valve 11. The water storage tank 02 is horizontally arranged below the pressure tank 01, and water in the water storage tank 02 enters the pressure tank 01 and needs to be pressurized by the pressurization pump 05.
The pressure pump 05 of the pressure supply unit is connected with the driving motor 21, when the driving motor 21 is in a driving state, pressure is supplied to the pressure pump 05 to pump the water in the water storage tank 02 into the pressure tank 01, when the driving motor 21 is in a closing state, the pressure pump 05 stops pumping the water, and the water pressure in the pressure tank 01 stops increasing.
The pressure stabilizing unit comprises a pressure sensor 22 arranged on the second water pipe 04 and a pressure stabilizing measurement and control device 23 in signal connection with the pressure sensor 22, the pressure stabilizing measurement and control device 23 is in control connection with the driving motor 21, the pressure stabilizing measurement and control device 23 comprises an input end, the input end is used for inputting a target pressure value and a preset deviation value, the pressure sensor 22 detects the water pressure of the pressure tank 01 in real time and converts the water pressure into an electric signal to be transmitted to the pressure stabilizing measurement and control device 23, after the pressure sensor 22 detects that the water pressure is reduced to the preset deviation value, the pressure stabilizing measurement and control device 23 transmits a pressure compensation signal to the driving motor 21, the driving motor 21 starts to supply pressure to a pressure pump 05 of the pressure supply unit so as to pump the water in the water storage tank 02 into the pressure tank 01 for pressure compensation, the water pressure of the pressure supply unit detected by the pressure sensor 22 is increased to the target pressure value, and the pressure stabilizing measurement and control device 23 transmits a pressure stop compensation signal to the driving motor 21, the driving motor 21 stops supplying pressure to the pressurizing pump 05 of the pressure supply unit, and the pressure supply unit enters a pressure maintaining state.
The monitoring unit includes pressure monitoring device 12 and sets up the standard sensor 13 that is used for measuring the water pressure of overhead tank 01 on second water pipe 04, and standard sensor 13 measures the pressure of overhead tank 01 in real time and conveys pressure monitoring device 12 to, and pressure monitoring device 12 is used for recording the pressure fluctuation value of overhead tank 01 and the required pressure time of pressure supplementing that the pressure cell pressurizes the pressure of overhead tank 01 to the target pressure value when the pressure cell is to supplying the pressure unit to mend the pressure. The pressure monitoring device 12 of the monitoring unit is in control connection with the pressure regulating valve 11. When the standard sensor 13 detects that the pressure of the pressure tank 01 is maintained at the target pressure value and does not change, the pressure monitoring device 12 sends a control signal to the pressure regulating valve 11 to control the pressure regulating valve 11 to open, and the water in the second water pipe 04 flows into the water storage tank 02 to reduce the pressure in the pressure tank 01. When the standard sensor 13 detects that the pressure in the pressure tank 01 stops decreasing and shows an increasing trend, the pressure monitoring device 12 sends a control signal to the pressure regulating valve 11 to control the pressure regulating valve 11 to close, and the water in the second water pipe 04 stops flowing out of the water storage tank 02.
Wherein, the first water pipe 03 and the second water pipe 04 are pvc pipes. The pressure regulating valve 11 is an electrically controlled flow valve.
As an alternative embodiment, the pressure monitoring device 12 of the monitoring unit includes a first display panel, which displays the on/off state of the pressure regulating valve 11, the flow value when the pressure regulating valve 11 is in the open state, and the pressure value monitored by the standard sensor 13 in real time.
As an alternative embodiment, the pressure stabilizing measurement and control device 23 includes a second display panel, and the second display panel displays the on/off state of the driving motor 21, the target pressure value, the predetermined deviation value, and the water pressure of the pressure tank 01 detected by the pressure sensor 22 in real time. Under the condition, the pressure stabilizing performance and the response speed of the system can be evaluated according to the parameters displayed by the pressure stabilizing measurement and control device 23 and the pressure monitoring device 12.
As an alternative embodiment, the detection unit further includes an alarm, and when the pressure monitoring device 12 detects that the pressure deviation value when the voltage stabilizing system starts to supplement the voltage exceeds a reasonable range, or the voltage supplementing time exceeds a reasonable voltage supplementing time, the voltage stabilizing system sends an alarm signal to the alarm, and the alarm gives an alarm.
As an alternative embodiment, an alarm unit is disposed on the first display panel of the pressure monitoring device 12 of the monitoring unit, and when the pressure compensation value of the pressure stabilizing system when starting pressure compensation exceeds a reasonable range, or the pressure compensation time exceeds a reasonable pressure compensation time, the alarm unit displays an alarm state.
As shown in fig. 2, the method for simulating water pressure fluctuation by the pressure fluctuation simulation system of the constant pressure system comprises the following steps:
s1, the driving motor (21) is started until the pressure of the pressure tank of the pressure supply unit enters a pressure stabilizing stage;
s2, opening the pressure regulating valve 11 to make the second water pipe 04 continuously discharge part of water to make the pressure in the pressure tank continuously decrease until the pressure stabilizing unit starts the driving motor 21 to supplement pressure to the pressure pump 05, and closing the pressure regulating valve 11;
s3 recording the difference P between the pressure value measured by the standard pressure sensor 22 and the target pressure value maintained in the pressure stabilizing stage when pressure compensation is startedⅠ；
S4 when the pressure of the pressure supply unit enters the pressure stabilizing stage again, the pressure compensating time t from the start to the end of the pressurization of the driving motor 21 is recordedⅠ；
S5, repeating the steps b) to d) m times after 5min, and sequentially recording the pressure difference value and the pressure supplementing time;
s6 calculating actual pressure fluctuation deviation value of pressure supply unit
；
S7 calculating the time taken by the pressure stabilizing unit from the start of pressurization to the end of pressurization
。
Preferably, m is a positive integer of 3-5.
Wherein, in step S6, the actual pressure fluctuation deviation value is calculated
Is expressed by the formula:
preferably, the ratio of m =3,
step S7 calculates the time taken from pressurization to completion of pressurization
The formula of (1) is:
preferably, the ratio of m =3,
preferably, actual pressure fluctuation deviation values of a plurality of stages can be recorded by sub-class extrapolation
And time of pressurization
Where n represents the stages of the test, such as the first voltage stabilization stage, the second voltage stabilization stage …, and the nth voltage stabilization stage, where n is a positive integer greater than or equal to 1. As shown in fig. 3, a pressure fluctuation time-pressure graph of the method for simulating water pressure fluctuation for the pressure fluctuation simulation system of the constant pressure system of the present invention when n =5, wherein the pressure fluctuation curve in each pressure stabilization stage is as shown in fig. 4, and when the water pressure of the pressure supply unit drops to a certain extent, the pressure stabilization unit starts to raise the water pressure of the pressure supply unit to a target pressure value.
It is to be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that an article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.
The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.
Claims (9)
1. A pressure fluctuation simulation system of a constant pressure system, comprising: the device comprises a pressure supply unit, a pressure stabilizing unit and a monitoring unit; the monitoring unit is used for recording the pressure fluctuation value when the pressure stabilizing unit supplements the pressure to the pressure supply unit and recording the time required by the pressure stabilizing unit to complete pressure supplementation;
the pressure supply unit comprises a pressure tank (01), a water storage tank (02), a first water pipe (03) and a second water pipe (04), the water storage tank (02) is communicated with the bottom end of the pressure tank (01) through the first water pipe (03), a pressure pump (05) is arranged on the first water pipe (03) to pump water in the water storage tank (02) into the pressure tank (01), and the top of the pressure tank (01) is communicated with the water storage tank (02) through the second water pipe (04);
the second water pipe (04) is provided with a pressure regulating valve (11) for regulating the water pressure of the pressure supply unit, the water pressure of the pressure tank (01) is regulated by regulating the opening and closing of the pressure regulating valve (11) and regulating the flow rate of the pressure regulating valve (11), when the pressure regulating valve (11) is closed, the pressure in the pressure tank (01) presents a pressure rising or pressure maintaining state according to the water inlet condition of the first water pipe (03), when the pressure regulating valve (11) is opened, the water in the pressure tank (01) flows to the water storage tank (02) from the second water pipe (04), and the pressure in the pressure tank (01) is reduced;
the monitoring unit includes pressure monitoring device (12) and set up in be used for measuring on second water pipe (04) the hydraulic standard sensor (13) of overhead tank (01), standard sensor (13) real-time measurement the pressure of overhead tank (01) and convey to pressure monitoring device (12), pressure monitoring device (12) are used for the record the surge unit to when supplying the pressure unit to mend the pressure fluctuation value of overhead tank (01) and the surge unit will the pressure of overhead tank (01) pressurizes to the required pressure time of mending of target pressure value.
2. The pressure fluctuation simulation system of the constant pressure system as claimed in claim 1, wherein a pressurizing pump (05) of the pressure supply unit is connected to a driving motor (21), the driving motor (21) supplies pressure to the pressurizing pump (05) to pump water in the water storage tank (02) into the pressure tank (01) when in a driving state, and the pressurizing pump (05) stops pumping water when the driving motor (21) is in a shut-off state.
3. The pressure fluctuation simulation system of the constant pressure system according to claim 2, wherein the pressure stabilizing unit comprises a pressure sensor (22) arranged on the second water pipe (04) and a pressure stabilizing measurement and control device (23) in signal connection with the pressure sensor (22), the pressure stabilizing measurement and control device (23) is in control connection with the driving motor (21), the pressure stabilizing measurement and control device (23) comprises an input end for inputting a target pressure value and a predetermined deviation value, the pressure sensor (22) detects the water pressure of the pressure tank (01) in real time and converts the water pressure into an electric signal to be transmitted to the pressure stabilizing measurement and control device (23);
after the pressure sensor (22) detects that the water pressure of the pressure supply unit is reduced to a preset deviation value, the pressure stabilizing measurement and control device (23) sends a pressure compensation signal to the driving motor (21), and the driving motor (21) starts to supply pressure to a pressure pump (05) of the pressure supply unit so as to pump the water in the water storage tank (02) into the pressure tank (01) to supplement the pressure to the pressure supply unit;
the pressure sensor (22) detects that the water pressure of the pressure supply unit rises to a target pressure value, the pressure stabilizing measurement and control device (23) sends a pressure stop compensation signal to the driving motor (21), the driving motor (21) stops supplying pressure to a pressure pump (05) of the pressure supply unit, and the pressure supply unit enters a pressure maintaining state.
4. The pressure fluctuation simulation system of the constant pressure system as claimed in claim 1, wherein the pressure monitoring means (12) of the monitoring unit is controllably connected to the pressure regulating valve (11);
the standard sensor (13) detects that the pressure of the pressure tank (01) is maintained at a target pressure value and does not change any more, the pressure monitoring device (12) sends a control signal to the pressure regulating valve (11) to control the pressure regulating valve (11) to open, and the water in the second water pipe (04) flows into the water storage tank (02) to reduce the pressure in the pressure tank (01);
when the standard sensor (13) detects that the pressure in the pressure tank (01) stops decreasing and shows an increasing trend, the pressure monitoring device (12) sends a control signal to the pressure regulating valve (11) to control the pressure regulating valve (11) to close, and the water in the second water pipe (04) stops flowing out of the water storage tank (02).
5. The pressure fluctuation simulation system of the constant pressure system as claimed in claim 4, wherein the pressure monitoring means (12) of the monitoring unit comprises a first display panel displaying in real time an on/off state of the pressure regulating valve (11), a flow value when the pressure regulating valve (11) is in an on state, and a pressure value monitored in real time by the reference sensor (13).
6. The pressure fluctuation simulation system of a constant pressure system as claimed in claim 1, wherein the water storage tank (02) is disposed below the pressure tank (01) in a horizontal direction, and the pressurizing pump (05) is required for pressurizing water in the water storage tank (02) to enter the pressure tank (01).
7. The method for simulating water pressure fluctuation in a pressure fluctuation simulation system of a constant pressure system according to claim 3, comprising the steps of:
a) the driving motor (21) is started until the pressure of the pressure tank of the pressure supply unit enters a pressure stabilizing stage;
b) opening the pressure regulating valve (11) to enable the second water pipe (04) to continuously discharge part of water to enable the pressure in the pressure tank to continuously decrease until the pressure stabilizing unit starts a driving motor (21) to supplement pressure to the pressure pump (05), and closing the pressure regulating valve (11);
c) recording the difference P between the pressure value measured by the pressure sensor (22) and the target pressure value maintained in the pressure stabilizing stage when pressure compensation is startedⅠ；
d) When the pressure of the pressure supply unit enters the pressure stabilizing stage again, the pressure supplementing time t from the start to the end of the pressurization of the driving motor (21) is recordedⅠ；
e) Repeating the steps b) to d) m times after every 5min, and sequentially recording the pressure difference value and the pressure supplementing time;
f) calculating actual pressure fluctuation deviation value of pressure supply unit
；
g) Calculating the time taken by the pressure stabilizing unit from the start of pressurization to the end of pressurization
。
8. The method for simulating water pressure fluctuation according to claim 7, wherein m is a positive integer of 3 to 5.
9. A method of simulating water pressure fluctuations as claimed in claim 8 in which the actual pressure fluctuation deviation value is calculated in step f)
Is expressed by the formula:
said step g) calculating the time taken from pressurization to the end of pressurization
The formula of (1) is:
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