A section transfer control method and control system for a uranium enrichment cascade production line

Abstract

The present invention relates to the field of uranium enrichment production line control, and in particular to a section transfer control method and control system for a uranium enrichment cascade production line. The control method includes the control of transferring a transfer section from unit A to unit B and the control of transferring a transfer section from unit B back to unit A. The control system includes a unit A control station, a unit B control station, a control domain, and a numerical tracking module. The present invention realizes the change of the cascade structure of the uranium enrichment production line in conjunction with the overlap of process pipelines, ensures the diversified operation of the uranium enrichment production line, realizes the need to change the structure of the cascade production line to produce a variety of enrichment products, and ensures the efficient and stable operation of the cascade production line.

Description

Technical Field

[0001] The invention relates to the field of uranium enrichment production line control, and in particular to a section transfer control method and control system for a uranium enrichment cascade production line. Background Art

[0002] The structure of the uranium enrichment production line includes racks, units, and sections. A section is composed of a fixed number of mainframes connected in parallel. The number of parallel mainframes is proportional to the flow rate of the section. The more parallel machines there are, the greater the flow rate. A unit is composed of several sections connected in parallel. In process control, a unit is a minimum whole of control logic. The program logic of a unit is called a control station. A rack is composed of several separation stages in series. A unit can be a separation stage or can be split into two separation stages through pipelines.

[0003] According to the ideal cascade model proposed by cascade calculation theory, the closer the flow pattern formed by the separation stage flow rate of the cascade production line to the number of separation stages in the actual production process is to the ideal cascade, the closer the efficiency of the production line is to 100%. The cascade flow pattern can be changed to make it more in line with the ideal cascade flow pattern through the section transfer between units. At the same time, in order to produce products with different abundances, the overall structure of the cascade production line needs to be changed, that is, the section in one unit is transferred to another unit through the process pipeline to achieve the change of structure.

[0004] To achieve the section transfer between units, the materials of the transfer section must first be transferred from the original unit partition to the transferred unit through the inter-unit pipeline. In addition to the overlapping of process pipelines, section transfer also requires the transfer of the control logic of a section in process control, including the transfer of section valve control, instrument value display, accident protection signal, alarm status signal, etc.

[0005] At the control logic level, the unit is a minimum logic control unit (control station), which contains the control logic of several sections and the valves and other equipment of the unit itself. All sections of the unit and the equipment of the unit itself can be controlled by operating buttons on a unit flow chart operation interface. At the same time, the signal of each section not only affects the status of the equipment contained in itself, but also affects other sections of the unit and the equipment contained in the unit itself.

[0006] When a section is transferred between units, for example, a section of unit A is transferred to unit B, how to control the transferred section is an urgent problem to be solved. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to provide a section transfer control method and control system for a uranium enrichment cascade production line, which realizes the change of the cascade structure of the uranium enrichment production line in coordination with the overlap of process pipelines, ensures the diversified operation of the uranium enrichment production line, realizes the need for changing the structure of the cascade production line to produce a variety of enrichment products, and ensures the efficient and stable operation of the cascade production line.

[0008] The present invention provides a section transfer control method for a uranium enrichment cascade production line, wherein the transfer mode of the transfer section includes: transferring from unit A to unit B or transferring from unit B back to unit A;

[0009] The transfer control of the transfer section includes the transfer of equipment control commands and accident protection signals; the transfer in and out of the transfer section is controlled by a pair of interlocked section transfer in commands and section transfer out commands;

[0010] When the transfer section is transferred from unit A to unit B:

[0011] Combine the section transfer command with the equipment control command of unit B to determine the equipment control of the transferred section:

[0012] The B unit equipment control command and the section transfer command are ANDed. If both are passed, the B unit equipment control command controls the equipment in the transfer section.

[0013] At this time, the section transfer command will not pass. The A unit equipment control command and the section transfer command are ANDed. The A unit equipment control command cannot pass the AND operation module. At this time, the A unit equipment control command for the transfer section is invalid.

[0014] The accident protection signal of unit B is sent to the control station of unit A through inter-station communication. The section transfer command is combined with each accident protection signal to determine the equipment control of the transfer section:

[0015] The accident protection signal of unit B and the accident protection signal of the transfer section are operated in an OR operation, and the operation result is operated in an AND operation with the section transfer command. If the accident protection signal of unit B and any signal of the accident protection signal of the transfer section are established, and the section transfer command is passed, the established accident protection signal controls the corresponding equipment of the transfer section through the transfer section valve control module;

[0016] The transfer section accident protection signal and the section transfer out command are jointly judged. If the transfer section accident protection signal is established and the section transfer out command is passed, the transfer section accident protection signal is sent to the B unit control station through inter-station communication to control the equipment switch or start and stop of the B unit;

[0017] The transfer section accident protection signal and the section transfer command are jointly judged. If the transfer section accident protection signal is established and the section transfer command is not passed, the other parts of unit A are disconnected from the transfer section accident protection signal;

[0018] When the transfer section is transferred from unit B back to unit A:

[0019] Combine the section transfer command with the A unit equipment control command to determine the equipment control of the transfer section:

[0020] The A unit equipment control command and the section transfer command are ANDed. If both are passed, the A unit equipment control command is input into the transfer section to control the equipment in the transfer section.

[0021] At this time, the section transfer command will not pass, and the B unit equipment control command and the section transfer command will be ANDed, so the B unit equipment control command cannot pass the AND operation module. At this time, the B unit is invalid for the section transfer control command;

[0022] Combine the section transfer command with the accident protection signal to determine the equipment control of the transfer section:

[0023] The accident protection signals of the A unit's own components, the accident protection signals of other sections of the A unit and the accident protection signals of the transfer section are ORed, and the operation result is ANDed with the section transfer command.

[0024] If any of the accident protection signals of the components of unit A, the accident protection signals of other sections of unit A, and the accident protection signals of the transfer section are established, and the section transfer command is passed, the established accident protection signal controls the corresponding equipment through the transfer section valve control module;

[0025] The transfer section accident protection signal and the section transfer command are jointly judged. If the transfer section accident protection signal is established and the section transfer command is passed, the transfer section accident protection signal controls other parts of unit A through the valve control modules of other parts of unit A.

[0026] The transfer section accident protection signal and the section transfer-out command are jointly judged. If the transfer section accident protection signal is established and the section transfer-out command is not passed, the B unit equipment is disconnected from the transfer section accident protection signal.

[0027] In a specific embodiment of the present invention, the other parts of the A unit include the unit's own components and other sections within the unit.

[0028] In a specific implementation of the present invention, the B unit accident protection signal includes the B unit's own accident protection signal and the B unit section's accident protection signal.

[0029] In a specific embodiment of the present invention, the section transfer-out command and the section transfer-in command are a pair of interlocking custom switches, which track output values ​​of each other to adjust their own numerical outputs;

[0030] When the section transfer-out command is passed, the section transfer-in command is not passed; when the section transfer-out command is not passed, the section transfer-in command is passed;

[0031] After the section transfer-out command or section transfer-in command is jointly judged with the device control command, the device control of the transferred section is determined.

[0032] In a specific embodiment of the present invention, the valve control module body of the transfer section is retained in the A unit control station.

[0033] In a specific embodiment of the present invention, the device includes a valve and a motor.

[0034] The present invention also provides a uranium enrichment cascade production line section transfer control system, comprising:

[0035] A unit control station, including the control programs of all sections and units of A unit, is used to control the sections and units of A unit;

[0036] When a section is transferred from unit A to unit B or when a section is transferred from unit B back to unit A,

[0037] The control station of unit A is used to control the sections including the transfer section and the components of unit A itself;

[0038] Regardless of whether a section is transferred from unit A to unit B or a section is transferred from unit B back to unit A, the control program of the transferred section is always located at the control station of unit A;

[0039] The B unit control station contains the control programs of all sections of the B unit and the B unit itself, and is used to control the B unit sections and the B unit itself;

[0040] The control domain stores the flow charts of each unit and is used to issue section transfer-in or transfer-out commands;

[0041] The numerical tracking module is located in the control station of unit A or unit B and is provided with a pair of interlocking custom switches for controlling the transfer in and out of the transfer section.

[0042] In a specific embodiment of the present invention, the control station of unit A includes a transfer section valve control module of unit A, other part valve control modules of unit A, and an inter-station communication module;

[0043] The input end of the valve control module of the transfer section of unit A receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal;

[0044] The valve control module of other parts of unit A receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal;

[0045] The inter-station communication module is used to realize inter-station communication of analog and digital signals between the control station of unit A and the control station of unit B;

[0046] The B unit control station includes a B unit equipment valve control module and an inter-station communication module;

[0047] The input end of the valve control module of the equipment of unit B receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal.

[0048] In a specific embodiment of the present invention, the numerical tracking module includes an input command numerical tracking module and a output command numerical tracking module, the input end of the input command numerical tracking module receives a section output command, and the output end outputs a section input command; the input end of the output command numerical tracking module receives a section input command, and the output end outputs a section output command.

[0049] Compared with the prior art, the uranium enrichment cascade production line section transfer control method and control system of the present invention cooperate with the equipment section transfer of the cascade production line to achieve the change of the control method; ensure the diversified operation of the uranium enrichment cascade production line in the future, realize the need to change the structure of the cascade production line to produce a variety of enrichment products, and ensure the efficient and stable operation of the cascade production line. The section transfer program writing method designed by the present invention is suitable for all production lines in the same industry with section transfer requirements, and can be promoted for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram showing a cascade flow pattern;

[0051] Figure 2 Schematic diagram showing the transfer of equipment control commands and accident protection signals;

[0052] Figure 3 Represents a numerical tracking logic diagram;

[0053] Figure 4 Indicates the control logic of the transfer section of unit A;

[0054] Figure 5 Indicates the control logic of other parts of unit A;

[0055] Figure 6Indicates the control logic of unit B:

[0056] Figure 7 Schematic diagram showing the equipment structure during section transfer;

[0057] 1-transfer section, 2-B unit flow chart, 3-equipment control command, 4-inter-station communication, 5-A unit control station, 6-B unit control station, 7-B unit accident protection signal, 8-transfer section accident protection signal, 9-input end, 10-output end, 11-transfer command value tracking module, 12-transfer command value tracking module, 13-section transfer command, 14-section transfer command, 15-equipment open state signal, 16-equipment close state signal, 17-equipment open control signal, 18-equipment close control signal, 19-transfer section valve control module, 20-A unit equipment control command, 21-B unit Equipment control command, 22-A accident protection signal of the unit's own components, 23-A accident protection signal of other sections of unit A, 24-B accident protection signal of unit B itself, 25-B unit section accident protection signal, 26-OR control module, 27-AND control module, 28-A valve control module of other parts of unit A, 29-B unit equipment valve control module, 30-section material, 31-transfer section inlet and outlet valves, 32-transfer section and unit A connecting valve, 33-transfer section and unit B connecting valve, 34-A unit pipeline, 35-pipeline between unit A and unit B, 36-B unit pipeline. DETAILED DESCRIPTION

[0058] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0059] In the present invention, the equipment control command refers to the valve switch control command and the motor start and stop control command, which controls the valve switch and the motor start and stop; the accident protection signal refers to the signal generated when the accident protection instrument of a certain unit, such as a pressure gauge, exceeds a certain limit, and the accident protection signal controls the switch of certain equipment of the unit. The equipment includes valves and motors.

[0060] Transfer-out refers to transferring the section from unit A to unit B;

[0061] Transfer-in refers to the transfer section from unit B to unit A.

[0062] The section transfer control method of the uranium enrichment cascade production line of the present invention is coordinated with the section transfer of the physical equipment. The section transfer of the physical equipment is the transfer of a section of the A unit to the B unit, or the transfer of the section from the B unit back to the A unit.

[0063] like Figure 1As shown, by transferring a section of unit A to unit B, the cascade flow pattern structure can be changed, so that the cascade flow pattern is close to the ideal flow pattern of the current working condition, and the cascade efficiency is closer to 100%. The section is the transfer section 1.

[0064] The embodiment of the present invention discloses a section transfer control method for a uranium enrichment cascade production line. The transfer mode of the transfer section includes: transferring from unit A to unit B or transferring from unit B back to unit A; the transfer control of the transfer section includes the transfer of equipment control commands and accident protection signals; the transfer in and out of the transfer section is controlled by a pair of interlocked section transfer in commands and section transfer out commands; the equipment control module body of the transfer section is retained in the control station of unit A;

[0065] like Figure 2 As shown,

[0066] When the transfer section 1 is transferred from unit A to unit B, the section is in the process of unit B. Figure 2 At this time, the device control command 3 can only be generated in the B unit process Figure 2 And control various equipment located in transfer section 1;

[0067] The B unit accident protection signal 7 generated by the B unit control station 6 is sent to the A unit control station 5 through the inter-station communication 4 to control the switch or start and stop of the relevant equipment of the transfer section 1;

[0068] The B unit accident protection signal 7 includes the B unit's own accident protection signal 24 and the B unit section's accident protection signal 25 .

[0069] The transfer section accident protection signal 8 generated in the transfer section 1 is sent to the B unit control station 6 through the inter-station communication 4 to control the equipment switch or start and stop of the B unit;

[0070] In the configuration management software, inter-station communication of analog and digital quantities can be realized through the two function blocks SEND_MIX and GET_MIX.

[0071] Unit B Process Figure 2 Issue a section transfer-out command 14 or a section transfer-in command 13, wherein the section transfer-out command 14 and the section transfer-in command 13 are a pair of interlocking custom switches, which track output values ​​of each other to adjust their own numerical outputs;

[0072] Specifically, Figure 3 As shown, in the A unit control station 5 or the B unit control station 6, a pair of interlocking custom switches are set by using the numerical tracking module to control the transfer in and out of the section. The output values ​​are tracked by the transfer-in command numerical tracking module 11 and the transfer-out command numerical tracking module 12, thereby adjusting the own numerical output.

[0073] The mutual locking values ​​between the segment transfer-in command 13 and the segment transfer-out command 14 are shown in Table 1:

[0074] Table 1 Interlock command values

[0075]

[0076] Since the state of the transfer section only exists in two situations: transfer in (transfer to unit A) and transfer out (transfer to unit B), the above interlocking commands are set to control the transfer in and transfer out of the section. The two commands cannot be ON at the same time, nor can they be OFF at the same time. Only one can be ON and the other OFF. The section transfer out command 14 is ON, and the section transfer in command 13 is OFF. At this time, it means that the transfer section 1 is located in unit B; the section transfer out command 14 is OFF, and the section transfer in command 13 is ON. At this time, it means that the transfer section 1 is located in unit A.

[0077] ON means passing, i.e. the transfer in or out is effective; OFF means failing, i.e. the transfer in or out is invalid.

[0078] like Figure 4 As shown, the logic control program represented by this figure is located in the control station of unit A.

[0079] The transfer section valve control module 19 is a logical function block in the configuration management software for controlling valves and motors. The module input end receives the device open state signal 15, the device closed state signal 16, the device switch control command, and the device interlock switch command, thereby controlling the switch of the device, and outputs the device open control signal 17 and the device close control signal 18 from the output end 10.

[0080] The equipment switch control command includes an A unit equipment control command 20 and a B unit equipment control command 21;

[0081] The equipment interlocking switch command involves the control command of the accident protection signal interlocking switch equipment, including the accident protection signal 22 of the component unit of unit A itself, the accident protection signal 23 of other sections of unit A, the transfer section accident protection signal 8, the accident protection signal 24 of unit B itself, and the accident protection signal 25 of the section of unit B.

[0082] The transfer in and out of the transfer segment 1 is controlled by the segment transfer out command 14 and the segment transfer in command 13 .

[0083] When transferring section 1 from unit A to unit B:

[0084] Unit B issues a control command to transfer section 1, but unit A cannot issue a control command to transfer section 1;

[0085] Combine the section transfer command 14 with the B unit equipment control command 21 to determine the equipment control of section 1:

[0086] The B unit equipment control command 21 and the section transfer command 14 are ANDed. If both are passed, the B unit equipment control command 21 transfers the equipment control of section 1.

[0087] At this time, the section transfer command 13 is not passed, and the A unit equipment control command 20 is ANDed with the section transfer command 13, so the A unit equipment control command 20 cannot pass the AND operation module, and the A unit equipment control command 20 is invalid at this time;

[0088] The accident protection signal 7 of unit B is sent to the control station 5 of unit A through the inter-station communication 4. The section transfer command 14 is combined with each accident protection signal to determine the equipment control of the transfer section 1:

[0089] The B unit accident protection signal 7 includes the B unit's own accident protection 24 and the B unit section's accident protection signal 25;

[0090] The accident protection signal 24 of unit B, the accident protection signal 25 of the unit B section and the accident protection signal 8 of the transfer section are ORed, and the operation result is ANDed with the section transfer command.

[0091] If any one of the accident protection signal 24 of unit B, the accident protection signal 25 of the unit B section and the transfer section accident protection signal 8 is established, and the section transfer command 14 is passed, the established accident protection signal controls the corresponding equipment through the transfer section valve control module 19;

[0092] If any of the accident protection signal 24 of unit B itself, the accident protection signal 25 of the unit B section and the accident protection signal 8 of the transfer section is established, and the section transfer command 14 is not passed, then the accident protection signal 24 of unit B itself and the accident protection signal 25 of the unit B section will not be able to take effect on the transfer section 1.

[0093] The transfer section accident protection signal 8 and the section transfer out command 14 are jointly judged. If the transfer section accident protection signal 8 is established and the section transfer out command 14 is passed, the transfer section accident protection signal 8 is sent to the B unit control station 6 through the inter-station communication 4 to control the equipment switch or start and stop of the B unit;

[0094] The transfer section accident protection signal 8 and the section transfer command 13 are jointly judged. If the transfer section accident protection signal 8 is established and the section transfer command 13 is not passed, the other parts of the A unit are disconnected from the transfer section accident protection signal 8;

[0095] In a specific embodiment, when the operator issues a section transfer-out command through the operation button, the section transfer-out command 14 is ON, and the section transfer-in command 13 is OFF. At this time, the transfer section 1 of unit A is located in unit B in the control logic, and the section does not exist in other control logics of unit A. At this time, the equipment control command 21 of unit B and the section transfer-out command 14 are both ON, and the control command can be input into the transfer section valve control module 19 through the AND control module 27 for equipment control. However, since the section transfer-in command 13 is OFF, the equipment control command 20 of unit A and the section transfer-in command 13 cannot pass through the AND control module 27, and the equipment control command 20 of unit A is invalid.

[0096] Since the section transfer-out command 14 is ON, when unit B generates the accident protection signal 24 of unit B itself or the accident protection signal 25 of the unit B section (the accident protection signal of unit B is ON), the transfer section 1 can be controlled through the AND control module 27; and since the section transfer-in command 13 is OFF, no matter what state the accident protection signal 22 of the component unit of unit A itself or the accident protection signal 23 of other sections of unit A is in, it cannot pass through the AND control module 27, thereby shielding the accident protection signal of unit A.

[0097] Among them, for the device control command signal, the control is effective ON, and the control is ineffective OFF;

[0098] When transferring section 1 from unit B back to unit A:

[0099] Unit A issues the equipment control command 3 for transferring section 1, but unit B cannot issue the equipment control command 3 for transferring section 1;

[0100] Combine the section transfer command 13 with the A unit equipment control command 20 to determine the equipment control of section 1:

[0101] The A unit equipment control command 20 is ANDed with the section transfer command 13. If both are passed, the A unit equipment control command 20 is input into the transfer section 1 to perform equipment control of the transfer section 1.

[0102] At this time, the section transfer command 14 is not passed, and the B unit equipment control command 21 is ANDed with the section transfer command 14, so the B unit equipment control command 21 cannot pass the AND operation module. At this time, the B unit's control command for transferring section 1 is invalid;

[0103] Combine the section transfer command 13 with the accident protection signal to determine the equipment control of the transfer section:

[0104] The accident protection signal 22 of the unit A itself, the accident protection signal 23 of other sections of the unit A and the accident protection signal 8 of the transfer section are ORed, and the result of the operation is ANDed with the section transfer command 13.

[0105] If any of the accident protection signal 22 of the constituent unit of unit A, the accident protection signal 23 of other sections of unit A and the accident protection signal 8 of the transfer section is established, and the section transfer command 13 is passed, the established accident protection signal controls the corresponding equipment through the transfer section valve control module 19;

[0106] The transfer section accident protection signal 8 and the section transfer command 13 are jointly judged. If the transfer section accident protection signal 8 is established and the section transfer command 13 is passed, the transfer section accident protection signal 8 controls the other parts of unit A through the valve control module 28 of the other parts of unit A.

[0107] The transfer section accident protection signal 8 and the section transfer-out command 14 are jointly judged. If the transfer section accident protection signal 8 is established and the section transfer-out command 14 is not passed, the B unit equipment is disconnected from the transfer section accident protection signal 8.

[0108] In a specific embodiment, when a section transfer-in command is issued by an operation button, the section transfer-out command 14 is OFF and the section transfer-in command 13 is ON. At this time, the transfer section of unit A is located at unit A in the control logic;

[0109] At this time, the A unit equipment control command 20 and the section transfer command 13 are both ON, and the A unit equipment control command 20 can be input into the transfer section valve control module 19 through the AND control module 27 for equipment control. However, since the section transfer command 14 is OFF, the B unit equipment control command 21 and the section transfer command 14 cannot pass through the AND control module 27. At this time, the B unit equipment control command 21 is invalid.

[0110] Since the section transfer-in command 13 is ON, the accident protection signal 22 of the A unit's own constituent units, the accident protection signal 23 of other sections of the A unit, and the transfer section accident protection signal 8 generated by the A unit can control the transfer section 1 through the AND control module 27; and since the section transfer-out command 14 is OFF, no matter what state the accident protection signal 24 of the B unit itself and the accident protection signal 25 of the B unit section are in, they cannot pass through the AND control module 27, thereby shielding the B unit accident protection signal 7.

[0111] The OR control module 26 ensures that when the section transfer-out command 14 is ON, the B unit equipment control command 21 and the accident protection signal can be input into the transfer section valve control module 19 input terminal 9, thereby controlling the equipment of the transfer section 1; when the section transfer-in command 13 is ON, the A unit equipment control command 20 and the accident protection signal can be input into the transfer section valve control module 19 input terminal 9, thereby controlling the equipment of the transfer section 1.

[0112] Control of other parts of the unit includes the following:

[0113] The other parts include the components of the unit itself and other sections in the unit except the transfer section;

[0114] The control station 5 of unit A issues the control command 20 of unit A equipment to other sections in unit A and implements the control. The control station 6 of unit B issues the control command 21 of unit B equipment to the sections in unit B and implements the equipment control.

[0115] Specifically, the A unit equipment control command 20 of the corresponding equipment of the A unit is issued by the A unit flow chart, and the A unit control station 5 processes and calculates the A unit equipment control command 20 to control the corresponding equipment;

[0116] When the B unit equipment control command 21 of the corresponding equipment of the B unit is issued by the B unit flow chart, the B unit control station 6 processes and calculates the B unit equipment control command 21 to control the corresponding equipment;

[0117] The control of the transfer section accident protection signal 8 generated by the transfer section on other parts of unit A includes:

[0118] The transfer section accident protection signal 8 and the section transfer command 13 are ANDed. If both are passed, the transfer section accident protection signal 8 controls other parts of unit A.

[0119] If the section transfer command 13 is not passed, the transfer section accident protection signal 8 will not affect unit A;

[0120] The control of the transfer section accident protection signal 8 generated by the transfer section on the B unit equipment specifically includes:

[0121] The transfer section accident protection signal 8 and the section transfer out command 14 are ANDed. If both are passed, the transfer section accident protection signal 8 controls the equipment of unit B.

[0122] If the section transfer out command is not passed, the transfer section accident protection signal 8 will not affect unit B;

[0123] Other parts of the accident protection signal control of the corresponding equipment, including:

[0124] When the accident instrument of unit A generates an accident protection signal, the control station of unit A processes and calculates the accident protection signal to control the corresponding equipment; when the accident instrument of unit B generates an accident protection signal, the control station of unit B processes and calculates the accident protection signal to control the corresponding equipment;

[0125] Specifically:

[0126] The accident protection signal 22 of the unit A itself and the accident protection signal 23 of other sections of the unit A are ORed together. If any accident protection signal appears, the accident protection signal will control the corresponding equipment in the unit A.

[0127] The accident protection signal 24 of unit B itself and the accident protection signal 25 of the unit B section are ORed. If any accident protection signal appears, the accident protection signal will control the corresponding equipment in unit B.

[0128] like Figure 5 As shown, the diagram represents the control logic of the remaining equipment of Unit A except the transfer section, that is, the control logic of the components of Unit A itself and other sections of Unit A; the control logic body is located in the control station of Unit A.

[0129] The transfer section accident protection signal 8 has an impact on other sections of unit A and the components of unit A itself. This impact is only effective when the transfer section 1 belongs to unit A. When the section is transferred to unit B, the accident protection signal of the section has no impact on unit A. According to such a logical relationship, when the section transfer command 13 is ON (the transfer section control logic is located in unit A), the transfer section accident protection signal 8 can be input to the input end 9 of the valve control module 28 of other parts of unit A through the AND control module 27; when the section transfer command 13 is OFF (the transfer section control logic is located in unit B), the transfer section accident protection signal 8 cannot pass through the AND control module 27 and has no impact on unit A.

[0130] Figure 5 In the embodiment, the OR control module 26 ensures that under any circumstances, the accident protection signal 22 of the constituent unit of unit A itself and the accident protection signal 23 of other sections of unit A can be input to the input end 9 of the valve control module 28 of other parts of unit A through the OR control module 26.

[0131] like Figure 6 , this diagram represents the equipment control logic of unit B, which is located in the control station of unit B.

[0132] When the transfer section 1 is transferred to the B unit, the accident protection signal generated by the section is transmitted to the B unit control station 6 through the inter-station communication 4, affecting the B unit itself and its sections. When the section transfer command 14 is ON, the transfer section accident protection signal 8 can be input to the input terminal 9 of the B unit equipment valve control module 29 through the AND control module 27; when the section transfer command 14 is OFF, the transfer section accident protection signal 8 cannot pass through the AND control module 27 and does not affect the B unit.

[0133] Figure 6 The OR control module 26 ensures that under any circumstances, the accident protection signal 24 of the B unit itself and the accident protection signal 25 of the B unit section can be input to the input end 9 of the B unit equipment valve control module 29 through the OR control module 26.

[0134] When the transfer section 1 is transferred to unit B, the flow chart of this section is part of the flow chart of unit B. Figure 2 The control interface is only visible on the B unit process Figure 2 The interface is visible, the flow chart interface of unit A only displays the valve status of the section, instrument data, etc., the control interface hides the flow chart of unit A, the transfer section cannot be selected, and the control command for the transfer section cannot be issued; when the transfer section 1 is transferred back to unit A, the flow chart of the section is visible on the flow chart of unit A, the control interface is only visible on unit A, and the flow chart of unit B Figure 2 The interface only displays the valve status of the transfer section, instrument data and other information, and the control interface is hidden. At this time, the B unit process Figure 2 The interface cannot select the transfer section and cannot issue the transfer section control command.

[0135] like Figure 7 When the transfer section 1 is in unit A, six valves including the transfer section inlet and outlet valves 31 and the transfer section and unit B connecting valves 33 of the on-site process pipeline are opened, and the three transfer section and unit A connecting valves 32 are closed. The section materials enter and exit unit A through the valves and are isolated from unit B; when the transfer section 1 is transferred to unit B, the transfer section inlet and outlet valves 31 and the transfer section and unit A connecting valves 32 are opened, and the three transfer section and unit B connecting valves 33 are closed. The section materials enter and exit unit B through the valves and the connecting pipelines between the units and are isolated from unit A.

[0136] In summary, the uranium enrichment cascade production line section transfer control method of the present invention, when the transfer section 1 is transferred from unit A to unit B, the process flow of unit B Figure 2 Generate a device control command 3 for the transfer section 1 and control various devices located in the transfer section 1;

[0137] The B unit accident protection signal 7 generated by the B unit control station 6 is sent to the A unit control station 5 through the inter-station communication 4 to control the switch or start and stop of the relevant equipment of the transfer section 1;

[0138] The transfer section accident protection signal 8 is sent to the B unit control station 6 through the inter-station communication 4 to control the equipment switch or start and stop of the B unit;

[0139] When transferring section 1 from unit B back to unit A:

[0140] The flow chart of unit A generates equipment control commands for the transfer section 1 and controls various equipment located in the transfer section 1;

[0141] The accident protection signal generated by the A unit control station 5 controls the switching or start and stop of the relevant equipment in the transfer section 1.

[0142] One embodiment of the present invention further discloses a section transfer control system for a uranium enrichment cascade production line, comprising:

[0143] A unit control station, including control programs for all sections of the A unit and its own components, used to control all sections of the A unit and its own components; the A unit sections include other sections and transfer sections;

[0144] When a section is transferred from unit A to unit B or when a section is transferred from unit B back to unit A,

[0145] The control station of unit A is used to control the sections including the transfer section and the components of unit A itself;

[0146] Regardless of whether a section is transferred from unit A to unit B or a section is transferred from unit B back to unit A, the control program of the transferred section is always located at the control station of unit A.

[0147] The difference is that when the section is transferred from unit A to unit B, the control command and accident protection signal of unit A itself have no effect on the transfer section control program located in the control station of unit A, so the transfer section cannot be controlled. However, the control command generated in the flow chart of unit B and the accident protection signal generated in the control station of unit B have an effect on the transfer section control program located in the control station of unit A, so at this time, the control of the transfer section can only be initiated or generated from unit B.

[0148] When the section is transferred from unit B back to unit A, only the control command and accident protection signal of unit A can control the control program of the transferred section located in the control station of unit A. The control signal and accident protection signal generated by unit B will no longer control the control program of the transferred section.

[0149] The control station of unit A includes a transfer section valve control module of unit A, other valve control modules of unit A and an inter-station communication module;

[0150] The input end of the valve control module of the transfer section of unit A receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal;

[0151] The valve control module of other parts of unit A receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal;

[0152] The inter-station communication module is used to realize inter-station communication of analog and digital signals between the control station of unit A and the control station of unit B;

[0153] The control station of unit A also includes operation modules, such as an OR control module, an AND control module, and an accident protection signal generated by an accident instrument of unit A;

[0154] The B unit control station contains the control programs of all sections of the B unit and the B unit itself, and is used to control the B unit sections and the B unit itself;

[0155] The B unit control station includes a B unit equipment valve control module and an inter-station communication module;

[0156] The input end of the valve control module of the equipment of unit B receives the equipment switch status signal, equipment control command, and accident protection signal, and its output end outputs the equipment opening and closing control signal;

[0157] The control station of unit B also includes operation modules, such as an OR control module, an AND control module, and an accident protection signal generated by an accident instrument of unit B;

[0158] The inter-station communication module is used to realize inter-station communication of analog and digital signals between the control station of unit A and the control station of unit B;

[0159] The control domain stores the flow charts of each unit and is used to issue section transfer-in or transfer-out commands and equipment control commands for each unit. Any flow chart can reference any signal located at any control station. For example, the flow chart of unit A can reference the control signal of the control station of unit A and generate the equipment control command of unit A through the operation button. It can also reference the control signal of the control station of unit B and generate the equipment control command of unit B through the operation button. When the control signal and control button of the transfer section are introduced on the flow chart of unit A, the flow chart of unit A can issue the control command of the transfer section. When the control signal and control button of the transfer section are introduced on the flow chart of unit B, the flow chart of unit B can issue the control command of the transfer section. Regardless of whether the control command is generated in the flow chart of unit A or the flow chart of unit B, all control signals of the transfer section are located at the control station of unit A.

[0160] The numerical tracking module is located in the control station of unit A or unit B and is provided with a pair of interlocking custom switches for controlling the transfer in and out of the transfer section.

[0161] The numerical tracking module includes an input command numerical tracking module or a output command numerical tracking module, wherein the input end of the input command numerical tracking module receives a section output command, and the output end outputs a section input command; the input end of the output command numerical tracking module receives a section input command, and the output end outputs a section output command.

[0162] The control method and control system involved in the present invention have been put into practical application in the new production capacity project of CNNC Lanzhou Uranium.

[0163] The present invention has the following key points:

[0164] (1) A control transfer method was designed to transfer the control logic control command of a section from one unit to another through inter-station transmission;

[0165] (2) A method of transferring accident protection signals is designed. The accident protection signal of a section affects the operation of the unit. Therefore, the corresponding accident protection signal should also be transferred after the section is transferred.

[0166] (3) A process flow chart display under section transfer conditions was designed.

[0167] A section transfer program writing method was designed by setting interlocking custom variables and inter-station communication, which realized the process control requirements of section transfer, such as section control transfer, flow chart state transfer, and accident protection signal transfer.

[0168] By isolating the control program from the flow chart interface, the program writing method is simplified, making the section transfer program concise and logically clear.

[0169] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0170] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the section transfer of a uranium enrichment cascade production line, characterized in that: The transfer section is transferred from unit A to unit B or from unit B back to unit A; the transfer control of the transfer section includes the transfer of equipment control commands and accident protection signals; the transfer in and out of the transfer section is controlled by a pair of interlocked section transfer in and out commands; When the transfer section is transferred from unit A to unit B: Combine the section transfer command with the equipment control command of unit B to determine the equipment control of the transferred section: The B unit equipment control command and the section transfer command are ANDed. If both are passed, the B unit equipment control command controls the equipment in the transfer section. At this time, the section transfer command will not pass. The A unit equipment control command and the section transfer command are ANDed. The A unit equipment control command cannot pass the AND operation module. At this time, the A unit equipment control command for the transfer section is invalid. The accident protection signal of unit B is sent to the control station of unit A through inter-station communication. The section transfer command is combined with each accident protection signal to determine the equipment control of the transfer section: The accident protection signal of unit B and the accident protection signal of the transfer section are operated in an OR operation, and the operation result and the section transfer command are operated in an AND operation. If the accident protection signal of unit B and any signal of the transfer section accident protection signal are established, and the section transfer command is passed, the established accident protection signal controls the corresponding equipment of the transfer section through the transfer section valve control module; The transfer section accident protection signal and the section transfer out command are jointly judged. If the transfer section accident protection signal is established and the section transfer out command is passed, the transfer section accident protection signal is sent to the B unit control station through inter-station communication to control the equipment switch or start and stop of the B unit; The transfer section accident protection signal and the section transfer command are jointly judged. If the transfer section accident protection signal is established and the section transfer command is not passed, the other parts of unit A are disconnected from the transfer section accident protection signal; When the transfer section is transferred from unit B back to unit A: Combine the section transfer command with the A unit equipment control command to determine the equipment control of the transfer section: The A unit equipment control command and the section transfer command are ANDed. If both are passed, the A unit equipment control command is input into the transfer section to control the equipment in the transfer section. At this time, the section transfer command will not pass, and the B unit equipment control command and the section transfer command will be ANDed, so the B unit equipment control command cannot pass the AND operation module. At this time, the B unit is invalid for the section transfer control command; Combine the section transfer command with the accident protection signal to determine the equipment control of the transfer section: The accident protection signals of the A unit, the accident protection signals of other sections of the A unit, and the accident protection signals of the transfer section are ORed, and the operation result is ANDed with the section transfer command. If any of the accident protection signals of the components of unit A, the accident protection signals of other sections of unit A, and the accident protection signals of the transfer section are established, and the section transfer command is passed, the established accident protection signal controls the corresponding equipment through the transfer section valve control module; The transfer section accident protection signal and the section transfer command are jointly judged. If the transfer section accident protection signal is established and the section transfer command is passed, the transfer section accident protection signal controls other parts of unit A through the valve control modules of other parts of unit A. The transfer section accident protection signal and the section transfer-out command are jointly judged. If the transfer section accident protection signal is established and the section transfer-out command is not passed, the B unit equipment is disconnected from the transfer section accident protection signal.

2. The uranium enrichment cascade production line section transfer control method according to claim 1, characterized in that: The other parts of the A unit include the unit's own components and other sections within the unit.

3. The uranium enrichment cascade production line section transfer control method according to claim 2, characterized in that: The B unit accident protection signal includes the accident protection of the B unit itself and the accident protection signal of the B unit section.

4. The uranium enrichment cascade production line section transfer control method according to claim 1, characterized in that: The section transfer-out command and the section transfer-in command are a pair of interlocking custom switch quantities, which track each other's output values ​​to adjust their own numerical outputs; When the section transfer-out command is passed, the section transfer-in command is not passed; when the section transfer-out command is not passed, the section transfer-in command is passed; After the section transfer-out command or section transfer-in command is jointly judged with the device control command, the device control of the transferred section is determined.

5. The method for controlling the section transfer of a uranium enrichment cascade production line according to claim 1, characterized in that: The valve control module body of the transfer section is retained in the A unit control station.

6. The method for controlling the section transfer of a uranium enrichment cascade production line according to claim 1, characterized in that: The device comprises a valve and a motor.

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