A method for controlling automatic entry and exit of a container

Abstract

The application belongs to the technical field of isotope separation, and particularly relates to a control method for automatic feeding and withdrawing of a container. The application comprises feeding system control, fine material system control and lean material system control, and each of the controls comprises the following steps: step 1, container working state judgment; step 2, container feeding control; and step 3, container withdrawing control. The application can ensure the correctness and stability of operation, improve the accuracy of process control, reduce the labor cost, and avoid the production stoppage risk caused by operation errors of process personnel.

Description

Technical Field

[0001] This invention belongs to the field of isotope separation technology, specifically relating to a control method for the automatic loading and unloading of containers. Background Technology

[0002] In the current domestic centrifugal nuclear fuel production system, the feeding and unloading of containers are manually operated on-site by process personnel based on the container status and system requirements. Process personnel monitor the system pressure and container capacity in real time. To ensure smooth container loading and unloading, process personnel check and record the system pressure and container capacity every 2 hours. When the relevant system pressure and container capacity approach a certain value, on-site process personnel prepare in advance, and after the conditions are met, 2 to 3 process personnel cooperate to complete the container loading or unloading operation.

[0003] Under the current operating mode, the operation can only be completed manually, and the existing process has the following disadvantages:

[0004] ① It is necessary to manually monitor the system pressure and the inlet pressure of the working container in real time, and check and determine whether the container should be put into or taken out;

[0005] ② Each step requires manual operation on-site, the process is complex, the labor cost is high, the correctness and timeliness of the operation depend on the experience and skills of the process personnel, and communication during on-site operation is only verbal, which is affected by factory noise and poses a risk of human error.

[0006] ③Low level of automation control. Summary of the Invention

[0007] The purpose of this invention is to provide a control method for the automatic loading and unloading of containers, which can ensure the correctness and stability of operation, improve the accuracy of process control, reduce labor costs, and avoid the risk of production stoppage caused by operator errors.

[0008] The technical solution adopted in this invention is as follows:

[0009] A control method for automatic container loading and unloading includes feeding system control, refined material system control, and lean material system control, each comprising the following steps: Step 1, determining the working status of the container; Step 2, container loading control; Step 3, container unloading control.

[0010] The feeding system control process involves determining whether the container is a working container or a standby container in step 1.

[0011] In the control of the refined feed system and the control of the lean feed system, step 1 determines whether the container is a working container, a first backup container, or a second backup container.

[0012] In the control of the feeding system, step 2 specifically includes the following steps:

[0013] Step 2.1: When all working containers are operating at 30% automatic opening of their electric regulating valves and at a working temperature of 80℃, the DCS system will issue an audible and visual alarm signal.

[0014] Step 2.2: Purify the backup material supply unit for 2 minutes through the backup material supply purification line and the material supply purification air-cooled box;

[0015] Step 2.3: Adjust the electric regulating valve of the spare container to the manual 0% opening position.

[0016] Step 2.4: After 1 minute, open the standby container feeding solenoid pneumatic valve. After 0.5 minutes, the electric regulating valve switches from manual 0% to automatic. Set the pressure after the electric regulating valve to the specified value, and the DCS system will issue an audible and visual alarm signal.

[0017] In the control of the feeding system, step 2.2 cannot be performed simultaneously with the purification and judgment of other units.

[0018] In the control of the feeding system, step 3 specifically includes the following steps:

[0019] Step 3.1: When the pressure in front of the electric regulating valve of the working container drops to 8 kPa and remains unchanged for 30 minutes, the DCS system issues an audible and visual alarm signal.

[0020] Step 3.2: Determine if the working container is empty. Manually adjust the electric regulating valve from 100% to 50%, 25%, and 0% opening. If the pressure change at the outlet of the working container is ≤10Pa, then the container is considered empty and the next step is performed. Otherwise, adjust the electric regulating valve to 10%, 25%, 50%, and 100% opening and continue feeding. Determine if the container is empty every 4 hours during the feeding period until the container is deemed empty.

[0021] Step 3.3: Close the electromagnetic pneumatic valve of the working container feeding line and set the working container electric regulating valve to the manual 50% opening state;

[0022] Step 3.4: Open the electromagnetic pneumatic valve of the material feeding and purification line and the inlet solenoid valve of the material feeding and purification air-cooled box in sequence.

[0023] Step 3.5: When the pressure in the working container remains unchanged for 30 minutes, open the outlet solenoid valve of the air-cooled box to connect to the intermediate container, and the DCS system will issue an audible and visual alarm signal.

[0024] The control of the concentrate system and the control of the lean feed system, in step 2, specifically includes the following steps:

[0025] Step 2.1: When the inlet pressure of the working container reaches 16 kPa, the DCS system generates a light alarm signal;

[0026] Step 2.2: When the pressure gauge at the inlet of the first backup container is lower than 0.133 kPa, open the inlet solenoid valve of the first backup container;

[0027] Step 2.3: The status of the first backup container is automatically switched to working, and the status of the second backup container is automatically switched back to the first backup container;

[0028] Step 2.4: The DCS system automatically generates a light alarm when the container of the lean material feeding system is put into operation.

[0029] Step 3 specifically includes the following steps:

[0030] Step 3.1: When the working container reaches its loading capacity, the DCS system generates a light alarm signal.

[0031] Step 3.2: The inlet pressure of the working container did not reach 16 kPa;

[0032] Step 3.3: Close the inlet solenoid valve of the working container; the working container status is now off.

[0033] Step 3.4: The DCS system automatically exits the light alarm for the lean material feeding system container.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] (1) The present invention provides a control method for automatic container loading and unloading, which can realize automatic container loading and unloading, ensure the correctness and stability of operation, improve the accuracy of process control, reduce labor costs, and avoid the risk of production stoppage caused by process personnel operation errors.

[0036] (2) The automatic container loading and unloading control method provided by the present invention enables automatic control of product quality, improves the efficiency of human resource utilization, and enhances the automation level of centrifugal cascade nuclear fuel production system in the context of the inevitable development of automation and intelligence and the continuous reduction of the number of employees in the field. Attached Figure Description

[0037] Figure 1 This is a flowchart of the material supply process of the present invention;

[0038] Figure 2 This is a flowchart of the refining process of the present invention;

[0039] Figure 3 This is a flowchart of the refining process of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms center, up, down, left, right, vertical, horizontal, inner, and outer, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms first, second, and third are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms installation, connection, and linking should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] This invention provides a control method for the automatic loading and unloading of containers, including control of a feeding system, control of a concentrate system, and control of a lean feed system. Specifically, the control of the feeding system includes the following steps:

[0044] Step 1: Determine the working status of the container:

[0045] Determine whether the container is a working container or a standby container;

[0046] Step 2, Container Input Control:

[0047] Step 2.1: When all working containers are operating at 30% automatic opening of their electric regulating valves and at a working temperature of 80℃, the DCS system will issue an audible and visual alarm signal.

[0048] Step 2.2: Purify the backup material supply unit for 2 minutes using the backup material supply purification line and the material supply purification air-cooled box; (Note: This operation cannot be performed simultaneously with the purification and judgment of other units.)

[0049] Step 2.3: Adjust the electric regulating valve of the spare container to the manual 0% opening position.

[0050] Step 2.4: After 1 minute, open the standby container feeding solenoid pneumatic valve. After 0.5 minutes, the electric regulating valve switches from manual 0% to automatic. Set the pressure after the electric regulating valve to the specified value, and the DCS system will issue an audible and visual alarm signal.

[0051] Step 3: Container Exit Control

[0052] Step 3.1: When the pressure in front of the electric regulating valve of the working container drops to 8 kPa and remains unchanged for 30 minutes, the DCS system issues an audible and visual alarm signal.

[0053] Step 3.2: Determine if the working container is empty. Manually adjust the electric regulating valve from 100% to 50%, 25%, and 0% opening (each step 10s apart). If the pressure change at the outlet of the working container is ≤10Pa, then determine if there is no material and proceed to the next step. Otherwise, adjust the electric regulating valve to 10%, 25%, 50%, and 100% opening (each step 10s apart) and continue feeding. Determine if there is no material every 4 hours during the feeding period until the container is determined to be empty.

[0054] Step 3.3: Close the electromagnetic pneumatic valve of the working container feeding line and set the working container electric regulating valve to the manual 50% opening state.

[0055] Step 3.4: Open the solenoid pneumatic valve of the material supply purification line and the inlet solenoid valve of the material supply purification air-cooled box in sequence. (Note: This operation cannot be performed simultaneously with the purification and judgment of other material supply containers.)

[0056] Step 3.5: When the pressure in the working container remains unchanged for 30 minutes, open the outlet solenoid valve of the air-cooled box to connect to the intermediate container, and the DCS system will issue an audible and visual alarm signal.

[0057] The specific steps involved in controlling the concentrate system are as follows:

[0058] Step 1: Determine the working status of the container:

[0059] Determine whether the container is a working container, a first backup container, or a second backup container;

[0060] Step 2: Container normal state entry and exit control:

[0061] Step 2.1: Inserting and removing containers under normal conditions.

[0062] Step 2.1.1: When the working container reaches its loading capacity, the DCS system issues an audible and visual alarm signal.

[0063] Step 2.1.2: When the pressure gauge at the inlet of the first backup container is lower than 0.133 kPa, open the inlet solenoid valve of the first backup container;

[0064] Step 2.1.3: The pressure gauge at the inlet of the first standby container rises, and the pressure gauge at the inlet of the working container drops to below 12 kPa. After 5 seconds, the inlet valve of the working container is closed.

[0065] Step 2.1.4: The working container status is deactivated, the status of the first backup container is automatically switched to working, and the status of the second backup container is automatically switched back to the first backup container;

[0066] Step 2.1.5: The DCS system automatically generates a light alarm signal upon successful conversion of the feed dispensing system container.

[0067] Step 2.2: Controlling the entry and exit of containers in abnormal states.

[0068] Step 2.2.1: When the pressure gauge at the inlet of the working container rises to 18 kPa, the DCS system issues an audible and visual alarm signal.

[0069] Step 2.2.2: When the pressure gauge at the inlet of the first backup container is lower than 0.133 kPa, open the inlet solenoid valve of the first backup container;

[0070] Step 2.2.3: Close the inlet valve of the working container. The original working container status is released, and the status of the first standby container is automatically switched to working. If there is a second standby container, the status is automatically switched back to the first standby container.

[0071] Step 2.2.4: The DCS system automatically generates a light alarm signal upon successful conversion of the feed dispensing system container.

[0072] The specific steps involved in controlling a lean feed system are as follows:

[0073] Step 1: Determine the working status of the container:

[0074] Determine whether the container is a working container, a first backup container, or a second backup container;

[0075] Step 2, Container Input Control:

[0076] Step 2.1: When the inlet pressure of the working container reaches 16 kPa, the DCS system generates a light alarm signal;

[0077] Step 2.2: When the pressure gauge at the inlet of the first backup container is lower than 0.133 kPa, open the inlet solenoid valve of the first backup container;

[0078] Step 2.3: The status of the first backup container is automatically switched to working, and the status of the second backup container is automatically switched to backup 1.

[0079] Step 2.4: The DCS system automatically generates a light alarm when the container of the lean material feeding system is put into operation.

[0080] Step 3, Container Exit Control:

[0081] Step 3.1: When the working container reaches its loading capacity, the DCS system generates a light alarm signal.

[0082] Step 3.2: The inlet pressure of the working container did not reach 16 kPa;

[0083] Step 3.3: Close the inlet solenoid valve of the working container; the working container status is now off.

[0084] Step 3.4: The DCS system automatically exits the light alarm for the lean material feeding system container.

[0085] Specific implementation methods

[0086] Example 1: Automatic feeding and discharging process of material feeding containers

[0087] When all working containers are operating at 80℃ and the electric regulating valves are set to 30% automatic opening, the backup feeding unit is purified for 2 minutes via the backup feeding purification line and the feeding purification air-cooled box. The electric regulating valve of the first backup feeding container is then adjusted to 0% manual opening. After 1 minute, the feeding solenoid valve of the first backup feeding container is opened. After 0.5 minutes, the electric regulating valve switches from 0% manual to automatic. Once the pressure after setting the electric regulating valve reaches the specified value, the feeding container is put into operation. When the pressure in front of the electric regulating valve of the first backup feeding container drops to 8 kPa and remains unchanged within 30 minutes, manually set the electric regulating valve of the first backup feeding container from 100% to 50%, 25%, and 0% opening in steps (each step interval 10 seconds). If the pressure change at the outlet of the first backup feeding container is ≤10 Pa, it is determined that the first backup feeding container is empty. Close the solenoid pneumatic valve of the feeding line of the first backup feeding container, set the electric regulating valve of the first backup feeding container to the manual 50% opening state, and sequentially open the solenoid pneumatic valve of the feeding purification line and the inlet solenoid valve of the feeding purification air-cooled box. If the pressure of the first backup feeding container does not change within 30 minutes, open the outlet solenoid valve of the air-cooled box to connect to the intermediate container.

[0088] Example 2: Automatic feeding and discharging process of refined material containers

[0089] When the first standby feed container reaches its full capacity, and the pressure gauge of the second standby feed container (standby 1) drops below 0.133 kPa, the inlet valve of the second standby feed container is opened, causing the inlet pressure gauge to rise. Meanwhile, the pressure gauge of the first standby feed container drops below 12 kPa. After 5 seconds, the inlet valve of the first standby feed container is closed, and it is deactivated. The first standby feed container is deactivated, and the second standby feed container automatically reverts to its working state, and its state automatically reverts to that of the first standby container. When the second standby feed container reaches its full capacity, and the pressure gauge of the third standby feed container (standby 3) drops below 0.133 kPa, the inlet valve of container #3 is opened, causing the inlet pressure gauge to rise. Meanwhile, the pressure gauge of the second standby feed container drops below 12 kPa. After 5 seconds, the inlet valve of the second standby feed container is closed, and it is deactivated.

[0090] Example 3: Automatic feeding and discharging process of lean material containers

[0091] When the inlet pressure of the working container reaches 16 kPa, and the inlet pressure gauges of the first and second backup feeding containers are below 0.133 kPa, the inlet valve of the second backup feeding container is opened to put it into operation. The status of the second backup feeding container automatically switches to working, and the status of the second backup container automatically switches back to the first backup container. When the filling volume of the second backup feeding container reaches the container loading capacity and the inlet pressure has not reached 16 kPa, the inlet valve of the second backup feeding container is closed, and the working status is deactivated.

[0092] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0093] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A control method for automatically inserting and removing containers, characterized in that: This includes control of the feeding system, the concentrate system, and the lean feed system, all of which involve the following steps: Step (1) Container working status judgment; The feeding system control, in step (1) it is determined whether the container is a working container or a standby container; The refined material system control, the lean material system control, in step (1) it is determined whether the container is a working container or a first standby container or a second standby container; Step (2), container input control; Step (3), container exit control; In the control of the feeding system, step (2) specifically includes the following steps: Step (2.1): When all working containers are operating at 30% automatic opening of the electric regulating valve and the container operating temperature is 80℃, the DCS system will issue an audible and visual alarm signal. Step (2.2): Purify the backup material supply unit for 2 minutes through the backup material supply purification line and the material supply purification air-cooled box; Step (2.3): Adjust the electric regulating valve of the spare container to the manual 0% opening state; Step (2.4): After 1 minute, open the electromagnetic pneumatic valve for feeding the standby container. After 0.5 minutes, switch the electric regulating valve of the standby container from the manual 0% state to the automatic state. Set the pressure after the electric regulating valve of the standby container to the specified value. The DCS system will issue an audible and visual alarm signal. In the control of the feeding system, step (3) specifically includes the following steps: Step (3.1): When the pressure in front of the electric regulating valve of the working container drops to 8 kPa and remains unchanged within 30 minutes, the DCS system issues an audible and visual alarm signal. Step (3.2): Determine if the working container is empty. Manually set the electric regulating valve of the working container from 100% to 50%, 25%, and 0% opening in steps. If the pressure change at the outlet of the working container is ≤10Pa, then it is determined that there is no material and proceed to the next step. Otherwise, set the electric regulating valve of the working container to 10%, 25%, 50%, and 100% in steps and continue feeding. Determine if there is no material every 4 hours during the feeding period until it is determined that there is no material. Step (3.3): Close the electromagnetic pneumatic valve of the working container feeding line and set the working container electric regulating valve to the manual 50% opening state; Step (3.4): Open the electromagnetic pneumatic valve of the material supply and purification line and the inlet electric valve of the material supply and purification air-cooled box in sequence. Step (3.5): When the working container pressure does not change for 30 minutes, open the outlet solenoid valve of the air-cooled box to connect to the intermediate container, and the DCS system will issue an audible and visual alarm signal.

2. The control method for automatic container insertion and removal according to claim 1, characterized in that: The lean material system control, in step (2), specifically includes the following steps: Step (2.1): When the inlet pressure of the working container reaches 16 kPa, the DCS system issues an audible and visual alarm signal. Step (2.2): When the pressure gauge of the first backup container inlet is lower than 0.133 kPa, open the inlet solenoid valve of the first backup container; Step (2.3): The status of the first backup container is automatically switched to working, and the status of the second backup container is automatically switched back to the first backup container; Step (2.4): The DCS system issues an audible and visual alarm for automatic activation of the lean material system container.

3. The control method for automatic container insertion and removal according to claim 2, characterized in that: The lean material system control, in step (3), specifically includes the following steps: Step (3.1): When the working container reaches the container loading capacity, the DCS system issues an audible and visual alarm signal; Step (3.2): The inlet pressure of the working container did not reach 16 kPa; Step (3.3): Close the inlet valve of the working container; the working container status is now off. Step (3.4): The DCS system issues an audible and visual alarm for the automatic exit of the lean material system container.

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