Heavy water reactor loading and unloading machine separator piston cylinder twinborn monitoring system and method

Abstract

The invention particularly relates to a heavy water reactor loading and unloading machine separator piston cylinder twin monitoring system and method, and belongs to the technical field of liquid leakage testing. The system comprises at least one comparison sample piece which is the same as a piston cylinder of a separator of a loading and unloading machine in actual work, and a master controller, the separator of the loading and unloading machine and the comparison sample piece are both in signal connection with the master controller, and the master controller controls a piston cylinder of the separator of the loading and unloading machine and the comparison sample piece to act synchronously. According to the method, the system is used for detecting the state of the separator of the heavy water reactor loader-unloader. The leakage rate of the separator of the loading and unloading machine is monitored in time, the maintenance frequency of the separator of the loading and unloading machine is reduced, and the use safety of the separator of the loading and unloading machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid leakage testing, and in particular to a twin monitoring system and method for a separator piston cylinder of a heavy water reactor refueling machine. Background Art

[0002] Nuclear power generation is an extremely important power generation method in China's power production. It transfers the heat generated by nuclear reactions to a steam generating device to generate steam to drive a steam turbine to generate electric energy. In a heavy water reactor, the central fuel rods are the main heat sources. After the central fuel rods are used for a certain period of time, they need to be transferred, and the edge fuel rods take over the reaction to ensure the stability and safety of nuclear power generation. During the movement of the fuel rods, the fuel rods are clamped by a refueling machine separator. The refueling machine separator is composed of 4 telescopic cylinders with different model specifications, which cooperate with a connecting rod mechanism and a clamping assembly to achieve stable clamping of the fuel rods. During operation, the refueling machine separator operates frequently. In a single cylinder, the piston moves up and down about 10 times in a complete action cycle. The piston and the cylinder body are in clearance fit. After frequent operation, the friction between the piston and the cylinder body will cause the clearance to increase, and the leakage rate will gradually increase. The existing refueling machine separators used in nuclear power plants have high configuration accuracy, mostly use purchased parts, and it is difficult and costly to replace spare parts, and shutdown inspection is required.

[0003] The existing maintenance of the refueling machine separator is to regularly check the internal piston condition. Generally, the disassembly and maintenance are carried out once every 3 to 4 years. This requires complex disassembly procedures, and the disassembly of the refueling machine separator is a destructive disassembly. The disassembly when it is not necessary to replace will cause great damage to the parts. If the piston and the cylinder body are not problematic and are disassembled and maintained, the service life of valuable parts will be artificially reduced.

[0004] The existing method for testing the leakage rate between the cylinder body and the piston rod in the refueling machine separator is as follows: after the refueling machine separator is disassembled, the piston rods and cylinder bodies are manually measured and inspected. After the worn parts are repaired, they are reassembled. The leakage rate of each cylinder body and piston is tested after assembly. By injecting water and pressurizing through the upper water inlet, one action is completed, and the leakage pipe is led out through the lower water inlet to calculate and measure the leakage rate, and each cylinder body is detected in turn; if the leakage rate is within the specified range, it can continue to be used, and if it does not meet the standard, new accessories need to be replaced. The overall process is very cumbersome, and the regular maintenance has a great impact on the piston rod and the cylinder body.

[0005] Therefore, there is an urgent need for a monitoring system and a monitoring method that can know the piston state without frequent disassembly and maintenance. Summary of the Invention

[0006] The object of the present invention is to provide a twin monitoring system and method for the separator piston cylinder of a heavy water reactor refueling machine. By setting a twin comparison sample of the separator of the heavy water reactor refueling machine, when the separator of the refueling machine is working, the comparison sample moves synchronously to simulate the working state of the separator of the refueling machine; by monitoring the leakage rate between each piston rod and the cylinder body in the comparison sample, the state of the working separator of the refueling machine is predicted, so as to realize the timely monitoring of the leakage rate of the separator of the refueling machine, reduce the maintenance frequency of the separator of the refueling machine, and improve the use safety of the separator of the refueling machine.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A twin monitoring system for the separator piston cylinder of a heavy water reactor refueling machine includes at least one comparison sample identical to the separator piston cylinder of the actual working refueling machine, and a total controller; both the refueling machine separator and the comparison sample are signal-connected to the total controller, and the total controller controls the synchronous movement of the refueling machine separator piston cylinder and the comparison sample.

[0008] As one achievable way, the refueling machine separator is used to separate one fuel rod bundle from the multi-fuel rod bundle queue sequentially conveyed by the conveying mechanism each time, position and intercept it, and wait for the refueling mechanism to grab it; The refueling machine separator is provided with a retractable probe block, a stop block and a pusher. Among them, the probe block is in front of the stop block, and the pusher is behind the stop block; the total controller controls the action of the refueling machine separator piston cylinder to provide driving force for the action of the refueling machine separator; One action of the refueling machine separator includes the probe block extending to position the target fuel rod bundle, the stop block extending to intercept the target fuel rod bundle, the pusher pushing the fuel rod bundle behind the stop block, the stop block retracting to the reset position, and the pusher retracting to the reset position.

[0009] As one achievable way, both the refueling machine separator piston cylinder and the comparison sample include a first group of piston cylinders, a second group of piston cylinders, a third group of piston cylinders and a fourth group of piston cylinders; the first group of piston cylinders, the second group of piston cylinders, the third group of piston cylinders and the fourth group of piston cylinders all include a cylinder body, a piston rod arranged corresponding to the cylinder body and in clearance fit, and a high-pressure water tank; upper water inlets and lower water inlets communicating with the cavity are respectively arranged on the upper and lower side surfaces of the cavity of the cylinder body. The upper water inlets are communicated with the high-pressure water tank through an upper water inlet main connecting pipe and an upper water inlet shunt pipeline, and the lower water inlets are communicated with the high-pressure water tank through a lower water inlet main connecting pipe and a lower water inlet shunt pipeline; Both the upper water inlet shunt pipeline and the lower water inlet shunt pipeline are divided into a first branch and a second branch. The first branch allows the water flow of the cylinder body to flow to the high-pressure water tank, and the second branch allows the water flow of the high-pressure water tank to flow to the cylinder body. An upper water inlet adjustable high-pressure pump and an upper water inlet switch valve are arranged on the second branch of the upper water inlet shunt pipeline, and a lower water inlet adjustable high-pressure pump and a lower water inlet switch valve are arranged on the second branch of the lower water inlet shunt pipeline; In the separator of the charging and discharging machine, the first group of piston cylinders provides driving force for the retraction and reset of the pusher, the second group of piston cylinders and the fourth group of piston cylinders provide driving force for the extension and retraction of the stopper, and the third group of piston cylinders provides driving force for the extension and retraction of the probe block; in the comparison sample, an upper water inlet flowmeter is installed on the upper water inlet main connecting pipe, and a lower water inlet flowmeter is installed on the lower water inlet main connecting pipe.

[0010] As one of the realizable ways, the piston rod includes a push rod composed of an upper rod and a lower rod, and a piston head between the upper rod and the lower rod; the piston head is in clearance fit in the cylinder block; the cylinder block is divided into an upper cavity and a lower cavity.

[0011] The present invention also provides a method for twin monitoring of piston cylinders of a heavy water reactor charging and discharging machine separator, using the above-mentioned twin monitoring system for piston cylinders of a heavy water reactor charging and discharging machine separator, including the following steps: Step 1: While assembling the separator of the charging and discharging machine, signal-connect the comparison samples of the same batch to the main controller; when the separator of the charging and discharging machine needs to act, the main controller controls the piston cylinders of the separator of the charging and discharging machine to act synchronously with each piston rod in the comparison sample; Step 2: The main controller calculates the single-stroke leakage rate of each piston rod in the comparison sample; Step 3: Set the specified maximum single-stroke leakage rate of each piston rod in the comparison sample; the main controller compares the single-stroke leakage rate of each piston rod in the comparison sample with the specified maximum single-stroke leakage rate of the corresponding piston rod to evaluate the leakage state between each piston rod and the cylinder block in the separator of the charging and discharging machine; Step 4: The main controller determines whether the separator of the charging and discharging machine needs to be disassembled and repaired according to the leakage state between each piston rod and the cylinder block in the separator of the charging and discharging machine.

[0012] As one of the realizable ways, in step 1, when the separator of the charging and discharging machine needs to act, the main controller controls the piston cylinders of the separator of the charging and discharging machine to act synchronously with each piston rod in the comparison sample, including the following steps: The initial states of the piston cylinders of the separator of the charging and discharging machine and the comparison sample are the same; When the separator of the charging and discharging machine needs to act, the main controller synchronously controls the generation of water pressure differences at both ends of the piston cylinders of the separator of the charging and discharging machine and each cylinder block in the comparison sample to push the piston cylinders of the separator of the charging and discharging machine and each piston rod in the comparison sample to act.

[0013] As one of the realizable ways, in step 2, the main controller calculates the single-stroke leakage rate of each piston rod in the comparison sample, including the following steps: The main controller calculates the single-action leakage amount of each piston rod in the comparison sample; The main controller calculates the single-action duration of each piston rod in the comparison sample; The master controller calculates the single-action leakage volume of each piston rod in the comparison sample part; The master controller calculates the single-action leakage rate of each piston rod in the comparison sample part; The master controller calculates the single-stroke leakage rate of each piston rod in the comparison sample part.

[0014] As one of the realizable ways, when the upper water inlet of the cylinder body where the piston rod is located is the water inlet direction and the lower water inlet of the cylinder body where the piston rod is located is the water return direction, the master controller calculates the single-action leakage volume of the piston rod according to the following formula: V 泄 =V 回 -a(V 容 -V 下杆 ) When the upper water inlet of the cylinder body where the piston rod is located is the water return direction and the lower water inlet of the cylinder body where the piston rod is located is the water inlet direction, the master controller calculates the single-action leakage volume of the piston rod according to the following formula: V 泄 =V 回 -a(V 容 -V 上杆 ) Wherein, V 泄 is the single-action leakage volume of the piston rod; V 回 is the total water return volume of the cylinder body where the piston rod is located, which is measured by the lower water inlet flowmeter; V 容 is the cavity volume of the cylinder body when the piston head is at any vertex of the cylinder body; V 上杆 is the volume of the upper rod in the upper cavity of the cylinder body; V 下杆 is the volume of the lower rod in the lower cavity of the cylinder body; a is the number of single actions of the piston cylinder.

[0015] As one of the realizable ways, the master controller calculates the single-action duration of the piston rod, including the following steps: Use the perpetual calendar clock module in the master controller to calculate the total single-action duration and the single-action pressure-holding duration of the piston rod; The master controller calculates the single-action duration of the piston rod; the formula for calculating the single-action duration of the piston rod is: T 动 =T 总 -T 保 ; One reciprocating motion of the piston rod is one action, and one action of the piston rod is completed by multiple actions; the master controller calculates the single-action duration of the piston cylinder; the formula for calculating the single-action duration of the piston cylinder is: T 单次动作 =T 动 / a; Wherein, T 动 is the single-action duration of the piston rod, T 保The pressure holding duration for a single action of the piston rod is T 总 The total duration for a single action of the piston rod is T 单次动作 The duration for a single action of the piston cylinder, where a is the number of single actions of the piston cylinder

[0016] As one of the achievable ways, the calculation formula for the leakage volume of a single action of the piston rod is: V 单次动作 =V 泄 / a; The calculation formula for the leakage rate of a single action of the piston rod is: Q 单次动作 =V 单次动作 / T 单次动作 ; The calculation formula for the leakage rate of a single stroke of the piston rod is: Q 单个行程 =Q 单次动作 / 2; Wherein, V 泄 is the leakage volume of a single action of the piston rod, a is the number of single actions of the piston rod, V 单次动作 is the leakage volume of a single action of the piston rod, T 单次动作 is the duration of a single action of the piston rod, Q 单次动作 is the leakage rate of a single action of the piston rod, Q 单个行程 is the leakage rate of a single stroke of the piston rod

[0017] As one of the achievable ways, in step three, the total controller compares the leakage rate of a single stroke of the piston rod in the comparison sample with the specified maximum leakage rate of a single stroke of the corresponding piston rod to evaluate the leakage state between the piston rod and the cylinder body in the loader / unloader separator, including the following steps: When the leakage rate of a single stroke of the piston rod in the comparison sample ≤ 85% of the specified maximum leakage rate of a single stroke of the corresponding piston rod, the total controller evaluates that the gap between the corresponding piston rod and the cylinder body in the piston cylinder of the loader / unloader separator is normal; When 85% of the specified maximum leakage rate of a single stroke of the corresponding piston rod < the leakage rate of a single stroke of the piston rod in the comparison sample ≤ the specified maximum leakage rate of a single stroke of the corresponding piston rod, the total controller evaluates that the corresponding piston rod in the piston cylinder of the loader / unloader separator is suspected of being worn beyond the safe operating state; When the leakage rate of a single stroke of the piston rod in the comparison sample > the specified maximum leakage rate of a single stroke of the corresponding piston rod, the total controller evaluates that the gap between the corresponding piston rod and the cylinder body in the loader / unloader separator is abnormal

[0018] As one of the achievable ways, in step four, the total controller determines whether the loader / unloader separator needs to be disassembled and overhauled according to the leakage state between each piston rod and the cylinder body in the loader / unloader separator, including the following steps: When the gap between each piston rod and its corresponding cylinder body in the separator piston cylinder of the charging and discharging machine is normal, the main controller determines that there is no need to disassemble and repair the separator of the charging and discharging machine; When the gap between any piston rod and its corresponding cylinder body in the separator of the charging and discharging machine is abnormal, the main controller determines that it is necessary to disassemble and repair the separator of the charging and discharging machine.

[0019] As one of the realizable ways, two comparison samples are set to synchronously simulate the actions of the separator piston cylinder of the charging and discharging machine; When 85% of the specified maximum single-stroke leakage rate of the corresponding piston rod < the single-stroke leakage rate of the piston rod in the comparison sample ≤ the specified maximum single-stroke leakage rate of the corresponding piston rod, one of the comparison samples is disassembled and inspected to estimate the cause of the leakage between the corresponding piston rod and its cylinder body in the disassembled separator of the charging and discharging machine, and to confirm whether it is necessary to disassemble and repair the separator of the charging and discharging machine; Before disassembling and repairing the separator of the charging and discharging machine, the other comparison sample continuously synchronously simulates the actions of the separator piston cylinder of the charging and discharging machine.

[0020] The beneficial technical effects of the present invention: The twin monitoring system and method for the separator piston cylinder of the heavy water reactor charging and discharging machine of the present invention can estimate the leakage state between each piston rod and the cylinder body without disassembling the separator of the charging and discharging machine during actual operation. It has strong real-time performance. Compared with the disassembly and repair after long-term operation, it can more intuitively and timely estimate the state of the separator of the charging and discharging machine, can give early warnings, detect problems in a timely manner, and can replace the separator of the charging and discharging machine in a short time after problems occur to ensure the safety and stability during the nuclear power operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the separator of the charging and discharging machine; Figure 2 It is a schematic diagram of the initial state of the separator of the charging and discharging machine; Figure 3 It is a schematic diagram of the probe block extending out of the separator of the charging and discharging machine; Figure 4 It is a schematic diagram of the stopper block extending out of the separator of the charging and discharging machine; Figure 5 It is a schematic diagram of the pusher pushing back in the separator of the charging and discharging machine; Figure 6 It is a schematic diagram of the piston cylinder structure.

[0022] In the figure: 1 is the cylinder block of the first group of piston cylinders; 2 is the cylinder block of the second group of piston cylinders; 3 is the cylinder block of the third group of piston cylinders; 4 is the cylinder block of the fourth group of piston cylinders; 5 is the piston rod of the first group of piston cylinders; 6 is the piston rod of the second group of piston cylinders; 6-1 is the upper rod; 6-2 is the piston head; 6-3 is the lower rod; 7 is the piston rod of the third group of piston cylinders; 8 is the piston rod of the fourth group of piston cylinders; 9 is the upper water inlet; 10 is the lower water inlet; 11-1 is the upper water inlet connecting main pipe; 11-2 is the lower water inlet connecting main pipe; 12 is the high-pressure water tank; 13-1 is the upper water inlet flowmeter; 13-2 is the lower water inlet flowmeter; 14-1 is the upper water inlet adjustable high-pressure pump; 14-2 is the lower water inlet adjustable high-pressure pump; 15-1 is the upper water inlet switch valve; 15-2 is the lower water inlet switch valve. Detailed implementation manners

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0024] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] The orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] The terms "first," "second," "third," "fourth," etc., are intended solely to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order. The terms "comprise," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, and may include, in addition to the listed elements, other elements not expressly listed.

[0028] The technical solution of the present invention is described clearly and completely below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 3 As shown, this embodiment provides a heavy water reactor loader and unloader separator piston cylinder twin monitoring system, including at least one comparison sample that is identical to the loader and unloader separator piston cylinder in actual work, and a main controller; the loader and unloader separator and the comparison sample are both connected to the main controller signal, and the main controller controls the loader and unloader separator piston cylinder and the comparison sample to move synchronously.

[0030] In this embodiment, as one of the possible implementation methods, the loader separator is used to accurately separate one fuel bundle at a time from the queue of multiple fuel bundles sequentially delivered by the conveying mechanism, and locate and intercept it to be grabbed by the refueling mechanism; The loader / unloader separator is equipped with a retractable probe block, a stop block, and a pusher. The probe block is located in front of the stop block, and the pusher is located behind the stop block. The master controller controls the movement of the piston cylinder of the loader / unloader separator, providing driving force for the movement of the loader / unloader separator. One action of the loader separator includes the probe extending to locate the fuel rod bundle, the block extending to intercept the fuel rod bundle, the thruster pushing back the fuel rod bundle behind the block, the block retracting to reset, and the thruster retracting to reset.

[0031] Working principle of heavy water reactor loader and unloader separator: 1. Initial state: The stopper retracts and returns to the avoidance position, the probe extends and elastically contacts the surface of the fuel bundle, the thruster retracts and returns to its original position, and the fuel bundle queue is neatly arranged and moved forward under the push of the conveying mechanism; 2. Detection trigger: When the probe enters the gap between the first and second fuel rods at the front of the fuel bundle queue, the probe is triggered to send a separation signal to the main controller; 3. Stopper action: The main controller receives the separation signal and controls the stopper to extend to the blocking position. The second fuel bundle is blocked by the stopper at the separation position. 4. Thruster action: After the block extends, the thruster pushes back, pushing all subsequent fuel bundles behind the block in the opposite direction of the fuel bundle queue, causing them to retreat a certain distance as a whole. This leaves space for the block to retract to the avoidance position and prevents the subsequent fuel bundles from piling up; 5. Removal of fuel rod bundle: The refueling mechanism grasps the first fuel rod bundle and sends it into or removes it from the fuel channel. 6. Reset: After the first fuel rod bundle is removed, the master controller controls the stopper to retract and reset to the avoidance position, the pusher retracts and resets, and the probe block maintains elastic contact with the surface of the fuel rod bundle. 7. Forward movement of the fuel rod bundle queue: The conveying mechanism pushes the entire fuel rod bundle queue forward again; the gap between the original second and third fuel rod bundles triggers the probe block, entering the next separation cycle.

[0032] In this embodiment, as one of the realizable ways, both the separator piston cylinder of the charging and discharging machine and the reference sample include a first group of piston cylinders, a second group of piston cylinders, a third group of piston cylinders, and a fourth group of piston cylinders; the first group of piston cylinders, the second group of piston cylinders, the third group of piston cylinders, and the fourth group of piston cylinders all include a cylinder block, a piston rod arranged corresponding to the cylinder block and in clearance fit, and a high-pressure water tank 12; upper water inlets 9 and lower water inlets 10 communicating with the cavity are respectively opened on the upper and lower side surfaces of the cavity of the cylinder block, the upper water inlet 9 is communicated with the high-pressure water tank 12 through an upper water inlet main connecting pipe 11-1 and an upper water inlet shunt pipeline, and the lower water inlet 10 is communicated with the high-pressure water tank 12 through a lower water inlet main connecting pipe 11-2 and a lower water inlet shunt pipeline. Both the upper water inlet shunt pipeline and the lower water inlet shunt pipeline are divided into a first branch and a second branch. The first branch allows the water flow in the cylinder block to flow to the high-pressure water tank 12, and the second branch allows the water flow from the high-pressure water tank 12 to flow into the cylinder block. An upper water inlet adjustable high-pressure pump 14-1 and an upper water inlet switch valve 15-1 are provided on the second branch of the upper water inlet shunt pipeline, and a lower water inlet adjustable high-pressure pump 14-2 and a lower water inlet switch valve 15-2 are provided on the second branch of the lower water inlet shunt pipeline. In the separator of the charging and discharging machine, the first group of piston cylinders provides driving force for the forward and retraction reset of the pusher, the second group of piston cylinders and the fourth group of piston cylinders provide driving force for the extension and retraction reset of the stopper, and the third group of piston cylinders provides driving force for the extension and retraction reset of the probe block; in the reference sample, an upper water inlet flowmeter 13-1 is installed on the upper water inlet main connecting pipe 11-1, and a lower water inlet flowmeter 13-2 is installed on the lower water inlet main connecting pipe 11-2.

[0033] In this embodiment, as one of the realizable ways, the piston rod includes a push rod composed of an upper rod 6-1 and a lower rod 6-3, and a piston head 6-2 between the upper rod 6-1 and the lower rod 6-3; the piston head 6-2 is in clearance fit in the cylinder block; the cylinder block is divided into an upper cavity and a lower cavity.

[0034] This embodiment also provides a method for twin monitoring of the separator piston cylinder of a heavy water reactor charging and discharging machine. Using the above-mentioned twin monitoring system for the separator piston cylinder of a heavy water reactor charging and discharging machine, it includes the following steps: Step 1: While assembling the separator of the loading and unloading machine, connect the signal of the comparison sample of the same batch to the main controller; when the separator of the loading and unloading machine needs to act, the main controller controls the piston cylinder of the separator of the loading and unloading machine and each piston rod in the comparison sample to act synchronously. Step 2: The main controller calculates the single-stroke leakage rate of each piston rod in the comparison sample. Step 3: Set the specified maximum single-stroke leakage rate of each piston rod in the comparison sample; the main controller compares the single-stroke leakage rate of each piston rod in the comparison sample with the specified maximum single-stroke leakage rate of the corresponding piston rod to evaluate the leakage state between each piston rod and the cylinder block in the separator of the loading and unloading machine. Step 4: The main controller determines whether the separator of the loading and unloading machine needs to be disassembled and repaired according to the leakage state between each piston rod and the cylinder block in the separator of the loading and unloading machine.

[0035] In this embodiment, as one of the achievable ways, in Step 1, when the separator of the loading and unloading machine needs to act, the main controller controls the piston cylinder of the separator of the loading and unloading machine and each piston rod in the comparison sample to act synchronously, including the following steps: The initial states of the piston cylinder of the separator of the loading and unloading machine and the comparison sample are the same. When the separator of the loading and unloading machine needs to act, the main controller synchronously controls the piston cylinder of the separator of the loading and unloading machine and each cylinder block in the comparison sample to generate a water pressure difference at both ends, and pushes the piston cylinder of the separator of the loading and unloading machine and each piston rod in the comparison sample to act.

[0036] In this embodiment, as one of the achievable ways, a single action of the separator of the loading and unloading machine includes the probe block extending to position the fuel rod bundle. When the probe block of the separator of the loading and unloading machine needs to extend to position the fuel rod bundle, the main controller synchronously controls the piston cylinder of the separator of the loading and unloading machine and the upper water inlet switch valve 15-1 of the third group of piston cylinders in the comparison sample to open, the lower water inlet switch valve 15-2 to close, and the upper adjustable high-pressure pump 14-1 to boost pressure, so as to generate a water pressure difference at both ends of the cylinder block 3 of the third group of piston cylinders, and push the piston rod 7 of the third group of piston cylinders to move downward; during this process, in the third group of piston cylinders, the water in the high-pressure water tank 12 enters the upper cavity of the cylinder block through the second branch of the upper water inlet diversion pipeline and the upper water inlet main connection pipe 11-1 from the upper water inlet 9, pushing the piston rod to move downward, and the water in the lower cavity of the cylinder block returns to the high-pressure water tank 12 from the lower water inlet 10 through the lower water inlet main connection pipe 11-2 and the first branch of the lower water inlet diversion pipeline.

[0037] In this embodiment, as one of the achievable ways, a single action of the separator of the loading and unloading machine includes the stop block extending to intercept the fuel rod bundle and the stop block retracting and resetting. When the stopper of the loader / unloader separator needs to extend to intercept the fuel rod bundle, the master controller synchronously controls the piston cylinder of the loader / unloader separator and the upper water inlet switch valves 15-1 of the second and fourth piston cylinders in the comparison sample part to open, the lower water inlet switch valves 15-2 to close, and the upper water inlet adjustable high-pressure pump 14-1 to boost pressure, so as to generate a water pressure difference at both ends of the cylinder block 2 of the second piston cylinder and the cylinder block 4 of the fourth piston cylinder, and push the piston rods 6 of the second piston cylinder and 8 of the fourth piston cylinder to move downward; during this process, in the second and fourth piston cylinders, the water in the high-pressure water tank 12 is input into the upper cavity of the cylinder block through the second branch of the upper water inlet shunt pipeline and the upper water inlet main connecting pipe 11-1 from the upper water inlet 9, pushing the piston rod to move downward, and the water in the lower cavity of the cylinder block returns to the high-pressure water tank 12 from the lower water inlet 10 through the lower water inlet main connecting pipe 11-2 and the first branch of the lower water inlet shunt pipeline; When the stopper of the loader / unloader separator needs to retract and reset, the master controller synchronously controls the piston cylinder of the loader / unloader separator and the upper water inlet switch valves 15-1 of the second and fourth piston cylinders in the comparison sample part to close, the lower water inlet switch valves 15-2 to open, and the lower water inlet adjustable high-pressure pump 14-2 to boost pressure, so as to generate a water pressure difference at both ends of the cylinder block 2 of the second piston cylinder and the cylinder block 4 of the fourth piston cylinder, and push the piston rods 6 of the second piston cylinder and 8 of the fourth piston cylinder to move upward; during this process, in the second and fourth piston cylinders, the water in the high-pressure water tank 12 is input into the lower cavity of the cylinder block through the second branch of the lower water inlet shunt pipeline and the lower water inlet main connecting pipe 11-2 from the lower water inlet 10, pushing the piston rod to move upward, and the water in the upper cavity of the cylinder block returns to the high-pressure water tank 12 from the upper water inlet 9 through the upper water inlet main connecting pipe 11-1 and the first branch of the upper water inlet shunt pipeline.

[0038] In this embodiment, as one of the feasible ways, a single action of the loader / unloader separator includes the pusher pushing back the fuel rod bundle behind the stopper and the pusher retracting and resetting; When the pusher of the loader / unloader separator needs to push back the fuel rod bundle behind the stopper, the master controller synchronously controls the piston cylinder of the loader / unloader separator and the upper water inlet switch valve 15-1 of the first piston cylinder in the comparison sample part to open, the lower water inlet switch valve 15-2 to close, and the upper water inlet adjustable high-pressure pump 14-1 to boost pressure, so as to generate a water pressure difference at both ends of the cylinder block 1 of the first piston cylinder, and push the piston rod 5 of the first piston cylinder to move downward; during this process, in the first piston cylinder, the water in the high-pressure water tank 12 is input into the upper cavity of the cylinder block through the second branch of the upper water inlet shunt pipeline and the upper water inlet main connecting pipe 11-1 from the upper water inlet 9, pushing the piston rod to move downward, and the water in the lower cavity of the cylinder block returns to the high-pressure water tank 12 from the lower water inlet 10 through the lower water inlet main connecting pipe 11-2 and the first branch of the lower water inlet shunt pipeline; When the pusher of the loader-unloader separator needs to retract and reset, the master controller synchronously controls the upper water inlet switch valve 15-1 of the piston cylinder of the loader-unloader separator and the first group of piston cylinders in the comparison sample to close, the lower water inlet switch valve 15-2 to open, and the lower water inlet adjustable high-pressure pump 14-2 to boost pressure, so as to generate a water pressure difference at both ends of the cylinder block 1 of the first group of piston cylinders, and push the piston rod 5 of the first group of piston cylinders to move upward; during this process, in the first group of piston cylinders, the water in the high-pressure water tank 12 enters the lower cavity of the cylinder block through the second branch of the lower water inlet diversion pipeline and the lower water inlet main connecting pipe 11-2 from the lower water inlet 10, pushing the piston rod to move upward, and the water in the upper cavity of the cylinder block returns to the high-pressure water tank 12 from the upper water inlet 9 through the upper water inlet main connecting pipe 11-1 and the first branch of the upper water inlet diversion pipeline.

[0039] In this embodiment, as one of the achievable ways, the pressure boost of both the upper water inlet adjustable high-pressure pump 14-1 and the lower water inlet adjustable high-pressure pump 14-2 is to increase a water pressure on the basis of the basic water pressure. For example, a water pressure of 3.5 MPa is increased on the basis of the basic water pressure.

[0040] When a single action of the loader-unloader separator is required, the master controller synchronously sends a start command for a single action of the piston rod to the piston cylinder of the loader-unloader separator and the corresponding group of piston cylinders in the comparison sample. After the piston cylinder of the loader-unloader separator and the corresponding group of piston cylinders in the comparison sample synchronously receive the start command for a single action of the piston rod, they complete a series of single actions of the piston rod and reset, which is the single action of the piston rod. The state in which the corresponding cylinder block remains stationary during the completion of the single action of the piston rod is the pressure-holding state.

[0041] In this embodiment, as one of the achievable ways, step two, the master controller calculates the single-stroke leakage rate of each piston rod in the comparison sample, including the following steps: The master controller calculates the single-action leakage amount of each piston rod in the comparison sample; The master controller calculates the single-action duration of each piston rod in the comparison sample; The master controller calculates the single-action leakage amount of each piston rod in the comparison sample; The master controller calculates the single-action leakage rate of each piston rod in the comparison sample; The master controller calculates the single-stroke leakage rate of each piston rod in the comparison sample.

[0042] In this embodiment, as one of the achievable ways, when the upper water inlet of the cylinder block where the piston rod is located is the water inlet direction and the lower water inlet of the cylinder block where the piston rod is located is the water return direction, the master controller calculates the single-action leakage amount of the piston rod according to the following formula: V 泄 =V 回 -a (V 容 -V 下杆 ) When the upper water inlet of the cylinder body where the piston rod is located is in the water return direction and the lower water inlet of the cylinder body where the piston rod is located is in the water inlet direction, the total controller calculates the single-action leakage of the piston rod according to the following formula: V 泄 =V 回 -a(V 容 -V 上杆 ) Wherein, V 泄 is the single-action leakage of the piston rod; V 回 is the total volume of the water return of the cylinder body where the piston rod is located, which is measured by the lower water inlet flowmeter; V 容 is the volume of the cavity of the cylinder body when the piston head 6-2 is located at any vertex of the cylinder body; V 上杆 is the volume of the upper rod 6-1 in the upper cavity of the cylinder body; V 下杆 is the volume of the lower rod 6-3 in the lower cavity of the cylinder body; a is the number of single actions of the piston cylinder.

[0043] The piston head 6-2 and the upper and lower inner top surfaces of the cylinder body are sealed in a conical sealing form when the piston head 6-2 is pushed to the upper or lower vertex of the cylinder body. The conical sealing structure provided on the end face of the piston head has a negligible influence on the volume of the cavity of the cylinder body. Among them, V 上杆 , V 下杆 and V 容 are all known information of the piston cylinder and have corresponding values according to the model of the piston cylinder.

[0044] In this embodiment, as one of the realizable ways, the total controller calculates the single-action duration of the piston rod, including the following steps: Use the perpetual calendar clock module in the total controller to calculate the total single-action duration of the piston rod and the single-action pressure-holding duration of the piston rod; The total controller calculates the single-action duration of the piston rod; the formula for calculating the single-action duration of the piston rod is: T 动 =T 总 -T 保 ; One reciprocating motion of the piston rod is one action, and one action of the piston rod is completed by multiple actions; the total controller calculates the single-action duration of the piston rod; the formula for calculating the single-action duration of the piston rod is: T 单次动作 =T 动 / a; Wherein, T 动 is the single-action duration of the piston rod, T 保 is the single-action pressure-holding duration of the piston rod, T 总 is the total single-action duration of the piston rod, T 单次动作 is the single-action duration of the piston rod, and a is the number of single actions of the piston cylinder.

[0045] In this embodiment, as one of the achievable ways, the calculation formula for the leakage volume of the piston rod per single action is: V 单次动作 =V 泄 / a; The calculation formula for the leakage rate of the piston rod per single action is: Q 单次动作 =V 单次动作 / T 单次动作 ; The calculation formula for the leakage rate of the piston rod per single stroke is: Q 单个行程 =Q 单次动作 / 2; Wherein, V 泄 is the leakage volume of the piston rod per single action, a is the number of single actions of the piston rod, V 单次动作 is the leakage volume of the piston rod per single action, T 单次动作 is the duration of the single action of the piston rod, Q 单次动作 is the leakage rate of the piston rod per single action, Q 单个行程 is the leakage rate of the piston rod per single stroke.

[0046] In this embodiment, as one of the achievable ways, in step three, the specified maximum leakage rate per single stroke of the piston rod of the first group of piston cylinders is 280 mL / min, the specified maximum leakage rate per single stroke of the piston rod of the second group of piston cylinders is 600 mL / min, the specified maximum leakage rate per single stroke of the piston rod of the third group of piston cylinders is 200 mL / min, and the specified maximum leakage rate per single stroke of the piston rod of the fourth group of piston cylinders is 600 mL / min.

[0047] In this embodiment, as one of the achievable ways, in step three, the total controller compares the leakage rate per single stroke of the piston rod in the comparison sample with the specified maximum leakage rate per single stroke of the corresponding piston rod, and evaluates the leakage state between the piston rod and the cylinder body where it is located in the loader-unloader separator, including the following steps: When the leakage rate per single stroke of the piston rod in the comparison sample ≤ 85% of the specified maximum leakage rate per single stroke of the corresponding piston rod, the total controller evaluates that the clearance between the corresponding piston rod and the cylinder body where it is located in the piston cylinder of the loader-unloader separator is normal; When 85% of the specified maximum leakage rate per single stroke of the corresponding piston rod < the leakage rate per single stroke of the piston rod in the comparison sample ≤ the specified maximum leakage rate per single stroke of the corresponding piston rod, the total controller evaluates that the corresponding piston rod in the piston cylinder of the loader-unloader separator is suspected of being worn beyond the safe operating state; When the leakage rate per single stroke of the piston rod in the comparison sample > the specified maximum leakage rate per single stroke of the corresponding piston rod, the total controller evaluates that the clearance between the corresponding piston rod and the cylinder body where it is located in the loader-unloader separator is abnormal.

[0048] In this embodiment, as one of the feasible ways, in step four, the master controller determines whether the separator of the loading and unloading machine needs to be disassembled and repaired according to the leakage state between each piston rod and the cylinder block in the separator of the loading and unloading machine, including the following steps: When the gap between each piston rod and the cylinder block where it is located in the piston cylinder of the separator of the loading and unloading machine is normal, the master controller determines that there is no need to disassemble and repair the separator of the loading and unloading machine; When the gap between any piston rod and the cylinder block where it is located in the separator of the loading and unloading machine is abnormal, the master controller determines that the separator of the loading and unloading machine needs to be disassembled and repaired.

[0049] In this embodiment, as one of the feasible ways, two comparison samples are set to synchronously simulate the actions of the piston cylinders of the separator of the loading and unloading machine; When 85% of the specified maximum single - stroke leakage rate of the corresponding piston rod < the single - stroke leakage rate of the piston rod in the comparison sample ≤ the specified maximum single - stroke leakage rate of the corresponding piston rod, one of the comparison samples is disassembled and inspected, the reasons for the leakage between the corresponding piston rod and the cylinder block in the disassembled separator of the loading and unloading machine are estimated, and it is confirmed whether the separator of the loading and unloading machine needs to be disassembled and repaired; Before disassembling and repairing the separator of the loading and unloading machine, the other comparison sample continues to synchronously simulate the actions of the piston cylinders of the separator of the loading and unloading machine.

[0050] The above - described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A twin monitoring system for the separator piston cylinder of a heavy water reactor refueling machine, characterized in that It includes at least one comparison sample piece identical to the separator piston cylinder of the charging and discharging machine in actual work, and a total controller; both the separator of the charging and discharging machine and the comparison sample piece are signal-connected to the total controller, and the total controller controls the synchronous movement of the separator piston cylinder of the charging and discharging machine and the comparison sample piece.

2. The twin monitoring system for the separator piston cylinder of the refueling machine of the heavy water reactor according to claim 1, characterized in that, The separator of the charging and discharging machine is used to accurately separate one fuel rod bundle from the queue of multiple fuel rod bundles sequentially conveyed by the conveying mechanism each time, position and intercept it, and wait for the refueling mechanism to grab it. The separator of the charging and discharging machine is provided with a retractable detecting block, a blocking block and a pushing device. Among them, the detecting block is in front of the blocking block, and the pushing device is behind the blocking block; the total controller controls the movement of the separator piston cylinder of the charging and discharging machine to provide driving force for the movement of the separator of the charging and discharging machine. One movement of the separator of the charging and discharging machine includes the detecting block extending out to position the fuel rod bundle, the blocking block extending out to intercept the fuel rod bundle, the pushing device pushing back the fuel rod bundle behind the blocking block, the blocking block retracting and resetting, and the pushing device retracting and resetting.

3. The twin monitoring system for the separator piston cylinder of the heavy water reactor refueling machine according to claim 2, wherein Both the separator piston cylinder of the charging and discharging machine and the comparison sample piece include a first group of piston cylinders, a second group of piston cylinders, a third group of piston cylinders and a fourth group of piston cylinders; the first group of piston cylinders, the second group of piston cylinders, the third group of piston cylinders and the fourth group of piston cylinders all include a cylinder block, a piston rod arranged corresponding to the cylinder block and in clearance fit, and a high-pressure water tank (12); both the upper and lower ends of the side surface of the cavity of the cylinder block are provided with an upper water inlet (9) and a lower water inlet (10) communicating with the cavity. The upper water inlet (9) is communicated with the high-pressure water tank (12) through an upper water inlet main connecting pipe (11-1) and an upper water inlet shunt pipeline, and the lower water inlet (10) is communicated with the high-pressure water tank (12) through a lower water inlet main connecting pipe (11-2) and a lower water inlet shunt pipeline. Both the upper water inlet shunt pipeline and the lower water inlet shunt pipeline are divided into a first branch and a second branch. The first branch allows the water in the cylinder block to flow to the high-pressure water tank (12), and the second branch allows the water in the high-pressure water tank (12) to flow to the cylinder block. An upper water inlet adjustable high-pressure pump (14-1) and an upper water inlet switching valve (15-1) are provided on the second branch of the upper water inlet shunt pipeline, and a lower water inlet adjustable high-pressure pump (14-2) and a lower water inlet switching valve (15-2) are provided on the second branch of the lower water inlet shunt pipeline. In the separator of the charging and discharging machine, the first group of piston cylinders provides driving force for the pushing back and retracting and resetting of the pushing device, the second group of piston cylinders and the fourth group of piston cylinders provide driving force for the extending out and retracting and resetting of the blocking block, and the third group of piston cylinders provides driving force for the extending out and retracting and resetting of the detecting block; in the comparison sample piece, an upper water inlet flowmeter (13-1) is installed on the upper water inlet main connecting pipe (11-1), and a lower water inlet flowmeter (13-2) is installed on the lower water inlet main connecting pipe (11-2).

4. The twin monitoring system for the separator piston cylinder of the refueling machine of the heavy water reactor according to claim 3, characterized in that, The piston rod includes a push rod composed of an upper rod (6-1) and a lower rod (6-3), and a piston head (6-2) between the upper rod (6-1) and the lower rod (6-3); the piston head (6-2) is in clearance fit in the cylinder block; the cylinder block is divided into an upper cavity and a lower cavity.

5. A twin monitoring method for the separator piston cylinder of a heavy water reactor refueling machine, characterized in that, Using the twin monitoring system for the separator piston cylinder of the heavy water reactor charging and discharging machine described in any one of claims 1-4, it includes the following steps: Step 1: While assembling the loader / unloader separator, connect the signal of the comparison sample parts of the same batch to the main controller; when the loader / unloader separator needs to act, the main controller controls the piston cylinder of the loader / unloader separator and each piston rod in the comparison sample parts to act synchronously; Step 2: The main controller calculates the single stroke leakage rate of each piston rod in the comparison sample parts; Step 3: Set the specified maximum single stroke leakage rate of each piston rod in the comparison sample parts; the main controller compares the single stroke leakage rate of each piston rod in the comparison sample parts with the specified maximum single stroke leakage rate of the corresponding piston rod to evaluate the leakage state between each piston rod and the cylinder block in the loader / unloader separator; Step 4: The main controller determines whether the loader / unloader separator needs to be disassembled and repaired according to the leakage state between each piston rod and the cylinder block in the loader / unloader separator.

6. The twin monitoring method for the separator piston cylinder of the heavy water reactor refueling machine according to claim 5, characterized in that Step 1, when the loader / unloader separator needs to act, the main controller controls the piston cylinder of the loader / unloader separator and each piston rod in the comparison sample parts to act synchronously, including the following steps: The initial states of the piston cylinder of the loader / unloader separator and the comparison sample parts are the same; When the loader / unloader separator needs to act, the main controller synchronously controls the piston cylinder of the loader / unloader separator and each cylinder block in the comparison sample parts to generate a water pressure difference at both ends, pushing the piston cylinder of the loader / unloader separator and each piston rod in the comparison sample parts to act.

7. The twin monitoring method for the separator piston cylinder of the refueling machine of the heavy water reactor according to claim 5, characterized in that, Step 2, the main controller calculates the single stroke leakage rate of each piston rod in the comparison sample parts, including the following steps: The main controller calculates the single action leakage amount of each piston rod in the comparison sample parts; The main controller calculates the single action duration of each piston rod in the comparison sample parts; The main controller calculates the single action leakage amount of each piston rod in the comparison sample parts; The main controller calculates the single action leakage rate of each piston rod in the comparison sample parts; The main controller calculates the single stroke leakage rate of each piston rod in the comparison sample parts.

8. The method for twin monitoring of the separator piston cylinder of the refueling machine in a heavy water reactor according to claim 7, characterized in that, When the upper water inlet of the cylinder block where the piston rod is located is the water inlet direction and the lower water inlet of the cylinder block where the piston rod is located is the water return direction, the main controller calculates the single action leakage amount of the piston rod according to the following formula: V 泄 = V 回 -a(V 容 - V 下杆 ) When the upper water inlet of the cylinder block where the piston rod is located is the water return direction and the lower water inlet of the cylinder block where the piston rod is located is the water inlet direction, the main controller calculates the single action leakage amount of the piston rod according to the following formula: V 泄 =V 回 -a(V 容 -V 上杆 ) Among them, V 泄 is the single-action leakage volume of the piston rod; V 回 is the total return water volume of the cylinder block where the piston rod is located, which is measured by the lower inlet flowmeter; V 容 is the cavity volume of the cylinder block when the piston head (6-2) is at any vertex of the cylinder block; V 上杆 is the volume of the upper rod (6-1) in the upper cavity of the cylinder block; V 下杆 is the volume of the lower rod (6-3) in the lower cavity of the cylinder block; a is the number of single actions of the piston cylinder.

9. The method for twin monitoring of the separator piston cylinder of the refueling machine in a heavy water reactor according to claim 7, characterized in that The main controller calculates the single action duration of the piston rod, including the following steps: Use the perpetual calendar clock module in the main controller to calculate the total single action duration of the piston rod and the single action pressure holding duration of the piston rod; The total controller calculates the single-action duration of the piston rod; the formula for calculating the single-action duration of the piston rod is: T 动 =T 总 -T 保 ; One reciprocating motion of the piston rod is one action, and one action of the piston rod is completed by multiple actions; the main controller calculates the single action duration of the piston rod; The calculation formula for the single-action duration of the piston rod is: T 单次动作 = T 动 / a; Among them, T 动 is the single action duration of the piston rod, T 保 is the single action pressure holding duration of the piston rod, T 总 is the single action total duration of the piston rod, T 单次动作 is the single action duration of the piston rod, and a is the number of single actions of the piston cylinder.

10. The method for twin monitoring of a separator piston cylinder of a heavy water reactor refueling machine according to claim 7, characterized in that, The calculation formula for the single - action leakage volume of the piston rod is: V 单次动作 =V 泄 / a; The calculation formula for the single-action leakage rate of the piston rod is: Q 单次动作 =V 单次动作 / T 单次动作 ; The calculation formula for the single stroke leakage rate of the piston rod is: Q 单个行程 =Q 单次动作 / 2; Among them, V 泄 is the single-action leakage volume of the piston rod, a is the number of single actions of the piston rod, V 单次动作 is the single-action leakage volume of the piston rod, T 单次动作 is the single-action duration of the piston rod, Q 单次动作 is the single-action leakage rate of the piston rod, Q 单个行程 is the single-stroke leakage rate of the piston rod.

11. The twin monitoring method for the separator piston cylinder of the refueling machine in a heavy water reactor according to claim 5, characterized in that, Step 3, the main controller compares the single stroke leakage rate of the piston rod in the comparison sample parts with the specified maximum single stroke leakage rate of the corresponding piston rod to evaluate the leakage state between the piston rod and the cylinder block where it is located in the loader / unloader separator, including the following steps: When the single stroke leakage rate of the piston rod in the comparison sample parts ≤ 85% of the specified maximum single stroke leakage rate of the corresponding piston rod, the main controller evaluates that the gap between the corresponding piston rod and the cylinder block where it is located in the piston cylinder of the loader / unloader separator is normal; When 85% of the specified maximum single - stroke leakage rate of the corresponding piston rod < the single - stroke leakage rate of the piston rod in the comparison sample ≤ the specified maximum single - stroke leakage rate of the corresponding piston rod, the master controller evaluates that the corresponding piston rod in the separator piston cylinder of the loading and unloading machine is suspected of being worn beyond the safe operating state; When the single - stroke leakage rate of the piston rod in the comparison sample > the specified maximum single - stroke leakage rate of the corresponding piston rod, the master controller evaluates that the clearance between the corresponding piston rod and the cylinder block in the separator of the loading and unloading machine is abnormal.

12. The twin monitoring method for the separator piston cylinder of the refueling machine of the heavy water reactor according to claim 5, characterized in that Step 4: The master controller determines whether the separator of the loading and unloading machine needs to be disassembled and repaired according to the leakage state between each piston rod and the cylinder block in the separator of the loading and unloading machine, including the following steps: When the clearance between each piston rod and the cylinder block where it is located in the separator piston cylinder of the loading and unloading machine is normal, the master controller determines that there is no need to disassemble and repair the separator of the loading and unloading machine; When the clearance between any piston rod and the cylinder block where it is located in the separator of the loading and unloading machine is abnormal, the master controller determines that the separator of the loading and unloading machine needs to be disassembled and repaired.

13. The method for twin monitoring of the separator piston cylinder of the refueling machine of a heavy water reactor according to claim 5, wherein Set two comparison samples to synchronously simulate the action of the separator piston cylinder of the loading and unloading machine; When 85% of the specified maximum single - stroke leakage rate of the corresponding piston rod < the single - stroke leakage rate of the piston rod in the comparison sample ≤ the specified maximum single - stroke leakage rate of the corresponding piston rod, disassemble and inspect one of the comparison samples, estimate the reason for the leakage between the corresponding piston rod and the cylinder block in the disassembled loading and unloading machine separator, and confirm whether it is necessary to disassemble and repair the separator of the loading and unloading machine; Before disassembling and repairing the separator of the loading and unloading machine, the other comparison sample continues to synchronously simulate the action of the separator piston cylinder of the loading and unloading machine.

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