CN103851246A - Multivalve cascade regulating method and regulating system - Google Patents

Abstract

The invention relates to a multivalve cascade regulating method and a regulating system. The regulating method comprises the following steps of step 1, sending out a regulation signal to a plurality of valve openings by a control channel module; step 2, dividing the range of the regulation signal sent out by the control channel module into m parts, and orderly distributing to the nth regulating valve received signal modules; step 3, further acquiring the opening signal range of the nth regulating valve by the nth regulating valve received signal module; step 4, feeding back the opening signal range of each regulating valve to the control channel module through a control signal transmission cable, so as to regulate the opening and precision of a plurality of cascade regulating valves synchronously. The invention also relates to the multivalve cascade regulating system, which comprises the control channel module and a regulating valve received signal module group connected to the circuit of the control channel module through a circuit; the regulating valve received signal module group is connected to the control channel module through the control signal transmission cable. The multivalve cascade regulating method and the regulating system provided by the invention can reduce cost and realize the overall management and regulation of the valve opening.

Description

A kind of many valves tandem regulating method and regulating system

Technical field

The present invention relates to nuclear industry field, be specifically related to a kind of tandem regulating method and regulating system of multiple valves.

Background technique

At present, at industrial control field, sometimes need to, in the time that different phase needs adjusting, the especially high-pressure system of different valve control accuracies or equipment at accurate coutroi velocity, conventionally adopt the regulating valve of different Cv values to be installed in parallel and to move.And control system adopts a control channel corresponding to a regulating valve conventionally.The deficiency of controlling is like this, system or equipment is in the time of high pressure, and the opening by mistake to open of large flux control valve tends to high-pressure system or equipment to cause larger impact, is unfavorable for the stable of the precision controlled and system.Boost in process in system, in the time of low pressure, conventionally wish that large flux control valve can quick closedown, reach as early as possible and boost to high pressure phase object, when system pressure is during close to high pressure spot, wish again to adopt the modulating valve of less Cv value to carry out the adjusting of small flow highi degree of accuracy.In system unload process, valve control is just contrary with aforementioned control strategy.If the regulating valve of different Cv values adopts different control channel, not only can cause control channel polygamy to put, the more important thing is and may cause opening by mistake of valve operator to open or close by mistake.

Summary of the invention

The technical problem that will solve of the present invention is to provide a kind of by multiple valves being carried out to tandem adjusting by a control channel, in the time using different Cv value regulating valve coutroi velocities, the different adjustment precision at difference control stage needs be can meet, and then the highi degree of accuracy of system, quick, steady, safe many valves tandem regulating method and regulating system realized.

In order to solve the problems of the technologies described above, technological scheme of the present invention is that a kind of many valves tandem regulating method and regulating system, comprising:

Step 1, send the regulated signal to multiple valve openings by control channel module;

The scope of step 2, regulated signal that control channel module is sent is divided into m part, and distribute to successively n modulating valve and receive signaling module, wherein n=1,2,3 ..., m;

Step 3, receive signaling module and further obtain the aperture range of signal of n modulating valve by n modulating valve;

Step 4, by control signal transmission cable, the aperture range of signal of described each modulating valve is fed back to described control channel module, and then the plurality of tandem modulating valve is carried out to aperture and precision regulates simultaneously.

Described step 2 comprises: the CLV ceiling limit value that control channel module is sent signal is S1, and lower limit is S2; The range of signal of distributing to the 1st modulating valve is

the range of signal of distributing to the 2nd modulating valve reception signaling module is

by that analogy, the range of signal of n modulating valve reception signaling module is

Described step 3 comprises: n control valve opening signal minimum is the lower limit that n modulating valve receives the range of signal of signaling module

n controlling opening of valve signal maximum is the CLV ceiling limit value that n modulating valve receives the range of signal of signaling module

Described S1=4mA, S2=20mA.

Described S1=0V, S2=10V.

A kind of many valves cascade control system, comprise a control channel module, cross the modulating valve acknowledge(ment) signal module group of connection with described control channel module link tester, described modulating valve acknowledge(ment) signal module group is connected in described control channel module by control signal transmission cable;

Described modulating valve acknowledge(ment) signal module group comprises that m the modulating valve being connected in series receives signaling module;

Described control channel module is sent the regulated signal to multiple valve openings, and the scope of the regulated signal that described control channel module is sent is divided into m part, and distribute to successively n modulating valve and receive signaling module, wherein n=1,2,3 ..., m; ;

Described n modulating valve receives signaling module and obtains n control valve opening range of signal;

The aperture range of signal of described each modulating valve is fed back to described control channel module by described control signal transmission cable.

Beneficial effect of the present invention:

(1) tandem that uses a control channel to realize multiple valves regulates, and has saved the configuration of control channel, reaches cost-saving object;

(2) the aperture control of multiple valves is incorporated into a control channel, realizes holistic management and the adjusting of valve opening;

(3) high-pressure system boost and step-down process in, realized the control of the different adjustment precision in each stage of system;

(4) avoided operator to open by mistake and open dangerous impact and the impact that large Cv value valve causes system and equipment at high pressure phase.

Accompanying drawing explanation

Fig. 1 is a kind of many valves cascade control system of the present invention schematic diagram;

In figure: 1-control channel module, the 1st modulating valve of 2-receives signaling module, and the 2nd modulating valve of 3-receives signaling module, and n modulating valve of 4-receives signaling module, and m modulating valve of 5-receives signaling module, 6-control signal transmission cable.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described further.

A kind of many valves tandem of the present invention regulating method, comprising:

Step 1, described control channel module are sent the regulated signal to multiple valve openings, and this passage sends 4 ~ 20mA or 0 ~ 10V signal conventionally, and the aperture of corresponding valve is the total aperture lower limit of required each valve and CLV ceiling limit value;

Step 2, the scope of control channel module being sent to signal are divided into m(m > 1 according to the number of valve and required aperture, and m is integer) part, distribute to m the modulating valve being connected in series and receive signaling module;

The CLV ceiling limit value that control channel module is sent signal is set to S1, and lower limit is set to S2; The range of signal of distributing to the 1st modulating valve is the range of signal of distributing to the 2nd modulating valve reception signaling module is

by that analogy, the range of signal of n modulating valve reception signaling module is

wherein n=1,2,3 ..., m;

Step 3, receive signaling module and further obtain the aperture range of signal of n modulating valve by n modulating valve;

N control valve opening signal minimum is set to the lower limit of the range of signal of n modulating valve reception signaling module

n controlling opening of valve signal maximum correspondence is set to the CLV ceiling limit value of the range of signal of n modulating valve reception signaling module

Step 4, by control signal transmission cable, the aperture range of signal of described each modulating valve is fed back to described control channel module, and then the plurality of tandem modulating valve is carried out to aperture and precision regulates simultaneously.

Described S1=4mA, S2=20mA;

Described S1=0V, S2=10V;

A kind of many valves cascade control system of the present invention as shown in Figure 1, comprise a control channel module, cross the modulating valve acknowledge(ment) signal module group of connection with described control channel module link tester, described modulating valve acknowledge(ment) signal module group is connected in described control channel module by control signal transmission cable;

Described modulating valve acknowledge(ment) signal module group comprises that m the modulating valve being connected in series receives signaling module; As shown in Figure 1, this m modulating valve receives signaling module and is followed successively by the 1st modulating valve reception signaling module, and the 2nd modulating valve receives signaling module, and n modulating valve receives signaling module, and m modulating valve receives signaling module, wherein n=1, and 2,3 ..., m;

Described control channel module is sent the regulated signal of each control valve opening;

Described n modulating valve receives signaling module and obtains n control valve opening range of signal.

Method of the present invention can be applied in nuclear boiler second side hydrostatic test system, can effectively guarantee carrying out smoothly of the hydrostatic test.

Claims (6)

1. the tandem regulating method of valve more than and a regulating method, is characterized in that: comprising:

Step 1, send the regulated signal to multiple valve openings by control channel module;

The scope of step 2, regulated signal that control channel module is sent is divided into m part, and distribute to successively n modulating valve and receive signaling module, wherein n=1,2,3 ..., m;

Step 3, receive signaling module and further obtain the aperture range of signal of n modulating valve by n modulating valve;

Step 4, by control signal transmission cable, the aperture range of signal of described each modulating valve is fed back to described control channel module, and then the plurality of tandem modulating valve is carried out to aperture and precision regulates simultaneously.

2. according to many valves tandem regulating method claimed in claim 1, it is characterized in that: described step 2 comprises: the CLV ceiling limit value that control channel module is sent signal is S1, and lower limit is S2; The range of signal of distributing to the 1st modulating valve is

the range of signal of distributing to the 2nd modulating valve reception signaling module is $(1\×\frac{S1-S2}{m},2\×\frac{S1-S2}{m});$ By that analogy, the range of signal of n modulating valve reception signaling module is $[(n-1)\×\frac{S1-S2}{m},n\×\frac{S1-S2}{m}].$

3. according to many valves tandem regulating method claimed in claim 2, it is characterized in that: described step 3 comprises: n control valve opening signal minimum is the lower limit that n modulating valve receives the range of signal of signaling module n controlling opening of valve signal maximum is the CLV ceiling limit value that n modulating valve receives the range of signal of signaling module

4. according to many valves tandem regulating method claimed in claim 2, it is characterized in that: described S1=4mA, S2=20mA.

5. according to many valves tandem regulating method claimed in claim 2, it is characterized in that: described S1=0V, S2=10V.

6. valve cascade control system more than a kind, it is characterized in that: comprise a control channel module, cross the modulating valve acknowledge(ment) signal module group of connection with described control channel module link tester, described modulating valve acknowledge(ment) signal module group is connected in described control channel module by control signal transmission cable;

Described modulating valve acknowledge(ment) signal module group comprises that m the modulating valve being connected in series receives signaling module;

Described control channel module is sent the regulated signal to multiple valve openings, and the scope of the regulated signal that described control channel module is sent is divided into m part, and distribute to successively n modulating valve and receive signaling module, wherein n=1,2,3 ..., m; ;

Described n modulating valve receives signaling module and obtains n control valve opening range of signal;

The aperture range of signal of described each modulating valve is fed back to described control channel module by described control signal transmission cable.

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