Converter valve water leakage detector and method of detecting same

Abstract

A kind of converter valve water leakage detector, comprising: fiber optic adapter is equipped with at least one spare passage, the spare passage is accessed online during the operation of converter valve;Light shield, through the fiber optic adapter, the light shield is provided with light transmission hole;Optical fiber connector, fixedly connected in the inside of the fiber optic adapter, two the optical fiber connector coaxial and symmetrically arranged on the two sides of the light shield, the optical fiber connector is provided with insertion hole corresponding to the position of the light transmission hole, two the insertion hole is respectively provided with trigger optical fiber and return optical fiber;The light shield is up and down with the change of water volume in water tank, so that the position of the light transmission hole and the position of the insertion hole are relatively changed;Collimating body, set at the port of the insertion hole close to the light shield;And control valve, respectively with the trigger optical fiber and the return optical fiber signal connection.This application has the ability of replacing optical fiber online when failure, improves the reliability of converter valve operation, reduces operation and maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage direct current transmission, in particular to a converter valve water leakage detector and a detection method thereof. BACKGROUND

[0002] With the rapid development of high-voltage direct current transmission, the development of converter valves has also attracted much attention. The converter valve is one of the key equipment in the high-voltage direct current transmission system, and the reliability of its operation directly affects the stability of the direct current transmission system. Generally, the internal cooling method of the converter valve adopts water cooling, but the water cooling system generally has a complex water circuit and a large number of water pipe joints. During long-term operation, there is a high risk of water leakage. Once water leakage occurs in the valve tower, the performance of product components including electrical elements will be greatly affected, which poses a great threat to the safety of the system. Therefore, a water leakage detection device needs to be set up to monitor the water leakage fault of the water cooling system. The water leakage detector is usually installed at the bottom shield to monitor whether the cooling water of the converter valve tower leaks.

[0003] In the traditional technology, the water leakage detector does not have a light signal collimation function, which affects the transmission of optical power, resulting in false water leakage detection failure, affecting the safe and stable operation of the converter valve, and leading to low detection stability. Meanwhile, the previous water leakage detector does not have the function of online replacement of faulty optical fibers. If the optical transmission path fails, the power supply can only be stopped for replacement, which has a large operation and maintenance cost. SUMMARY

[0004] Therefore, it is necessary to provide a converter valve water leakage detector and a detection method thereof to solve the problem that the converter valve water leakage detector cannot realize online replacement of faulty optical fibers.

[0005] A converter valve water leakage detector comprises:

[0006] An optical fiber adapter is provided with at least one standby channel, which is online connected during the operation of the converter valve.

[0007] An optical shield body penetrates the optical fiber adapter, and the optical shield body is provided with a light transmission hole.

[0008] Optical fiber connectors are fixedly connected inside the optical fiber adapter, and two optical fiber connectors are coaxially and symmetrically arranged on both sides of the optical shield body. The optical fiber connectors are provided with insertion holes corresponding to the positions of the light transmission holes, and trigger optical fibers and feedback optical fibers are respectively arranged in the two insertion holes. The optical shield body floats up and down with the change of the water volume in the water storage tank, so that the position of the light transmission hole changes relative to the position of the insertion hole.

[0009] A collimating body is arranged at the port of the insertion hole close to the optical shield body.

[0010] A control valve is connected to the trigger fiber and the return fiber.

[0011] In one embodiment, the bottom end of the light shield is fixed with a floating body, which drives the light shield to float up and down.

[0012] In one embodiment, the light shield is a grating.

[0013] In one embodiment, two fiber connectors coaxially and symmetrically arranged on both sides of the light shield form a connection subset, and the connection subset is provided with at least four.

[0014] In one embodiment, the fiber adapter is provided with at least three main channels, and the trigger fiber and the return fiber are arranged on both sides of the main channel.

[0015] The application also provides a detection method of the converter valve water leakage detector, which is applied to the converter valve water leakage detector and includes the following steps:

[0016] The control valve transmits N groups of trigger signals.

[0017] The light shield floats up and down with the change of the water level of the water storage tank, and the position of the light shield changes relative to the position of the fiber connector to allow or prevent the trigger signal from passing through the light shield to form a return signal.

[0018] The control valve receives the return signal and determines the water leakage state through the number of return signals.

[0019] In one embodiment, the step of determining the water leakage state by the control valve includes

[0020] The control valve collects at most N-2 groups of return signals to determine that the converter valve has water leakage.

[0021] The control valve collects N groups or N-1 groups of return signals to determine that the converter valve has no water leakage.

[0022] In one embodiment, the step of receiving the return signal by the control valve includes that the return fiber receives the return signal passing through the light shield through the collimating body and feeds back to the control valve.

[0023] In one embodiment, the step of allowing or preventing the trigger signal from passing through the light shield to form a return signal includes

[0024] When the converter valve has no water leakage, the floating body is static, the light transmission hole is in the same straight line with the insertion hole, the trigger signal passes through the light transmission hole of the light shield and is coupled to form a return signal.

[0025] When the converter valve leaks, the floating body drives the light shield to float upwards, the light transmission hole and the insertion hole are not in the same straight line, the light shield blocks or reflects the trigger signal, the trigger signal fails to penetrate the light transmission hole of the light shield, and cannot be coupled to form a return signal.

[0026] In one embodiment, the step of sending N groups of trigger signals by the control valve includes sending trigger signals to the trigger optical fiber by the control valve, and the trigger optical fiber emits the trigger signals through the collimator.

[0027] In one embodiment, before the control valve sends the trigger signals to the plurality of trigger optical fibers, the step of presetting the signal data of the trigger signals and the signal intensity of the trigger signals is further included.

[0028] The converter valve water leakage detector and the detection method thereof provided by the application have at least the following beneficial effects: the collimator is arranged on the converter valve water leakage detector, the collimator can converge the trigger signals emitted by the trigger optical fiber, and high coupling efficiency between the collimator and the return optical fiber can be achieved. One collimator can change the divergent light beam into a parallel light beam, the parallel light beam is coupled into the return optical fiber after reaching another collimator, the incidence efficiency between the collimator and the return optical fiber can be greatly improved, and the reliability of the water leakage detection optical signal is improved. In addition, the spare channel is arranged, the optical fiber connector is pre-installed in the water leakage detection device in advance, if one of the channels fails, it is not necessary to stop power supply to enter the converter valve tower to replace, and the function of on-line replacement without stopping operation can be realized.

[0029] The application is provided with a redundant channel structure and a multi-channel alarm mechanism, which can avoid the false alarm of water leakage detection caused by single-channel failure. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the converter valve water leakage detector in one embodiment;

[0031] Figure 2 It is a structural schematic diagram of the optical fiber adapter of the converter valve water leakage detector in one embodiment;

[0032] Figure 3 It is a water leakage detection collimating optical principle diagram of the converter valve water leakage detector in one embodiment;

[0033] Figure 4 It is a flow chart of the detection method of the converter valve water leakage detector in one embodiment;

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 10, converter valve water leakage detector; 100, optical fiber adapter; 110, housing; 120, main channel; 130, standby channel; 200, light shielding body; 210, light transmission hole; 300, optical fiber connector; 310, insertion hole; 400, collimating body; 410, first collimating member; 420, second collimating member; 500, trigger optical fiber; 600, return optical fiber; 700, valve controller; 800, floating body; 900, water storage tank. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it is understood that similar modifications will be made by those skilled in the art in the light of the foregoing description. Therefore, the present application is not limited to the following embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying a specified number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0042] Referring to Figure 1 and Figure 2 A converter valve water leakage detector 10 is provided in the water storage tank 900 of the converter valve, and a certain amount of water is poured into the water storage tank 900 to a test water level. The converter valve water leakage detector 10 comprises an optical fiber adapter 100, a light shield 200, an optical fiber connector 300, and a collimator 400. The light shield 200 penetrates the optical fiber adapter 100 and floats up and down relative to the optical fiber adapter 100, and the light shield 200 is provided with a light transmission hole 210. The optical fiber connector 300 is fixedly connected inside the optical fiber adapter 100, and two optical fiber connectors 300 are coaxially and symmetrically arranged on both sides of the light shield 200. The optical fiber connector 300 is provided with a insertion hole 310 corresponding to the position of the light transmission hole 210, and a trigger optical fiber 500 and a return optical fiber 600 are respectively arranged in the two insertion holes 310. The light shield 200 floats up and down with the change of the water level in the water storage tank 900, so that the position of the light transmission hole 210 changes relative to the position of the insertion hole 310. The collimator 400 is arranged at the port of the insertion hole 310 close to the light shield 200. The present application designs the collimator 400 to improve the alignment of the optical signal, and improves the reliability and stability of the optical signal transmission. In addition, the present application also provides a standby channel 130, and the optical fiber connector 300 is pre-installed in the water leakage detection device. If one of the main channels 120 fails, it is not necessary to stop power supply to replace the converter valve tower, and the function of on-line replacement without outage can be realized.

[0043] In one embodiment, the light shield 200 is arranged as a grating, the light shield 200 penetrates up and down along the vertical central axis of the optical fiber adapter 100, the bottom end of the light shield 200 is fixedly connected with the floating body 800, the floating body 800 drives the light shield 200 to float up and down, the floating body 800 can be specifically arranged as a float or other light-weight component, which is easy to float up and avoid the situation that the weight is too heavy to float up, the light shield 200 is provided with a light transmission hole 210, when the trigger signal emitted by the trigger optical fiber 500 can penetrate through the light transmission hole 210, a return signal can be formed and received by the return optical fiber 600. When the light transmission hole 210 is arranged, the diameter of the light transmission hole 210 should be reduced as much as possible, when the diameter of the light transmission hole 210 is small, the area through which the optical signal can pass through the light transmission hole 210 is reduced, when the optical signal passes through the light transmission hole 210, more accurate matching angle between the two is required, which improves the accuracy of the light shield 200 in transmitting the optical signal and improves the detection accuracy of the water leakage detector.

[0044] In one embodiment, the two coaxial and symmetrically arranged optical fiber connectors 300 on both sides of the light shield 200 form a connection subset, the jacks 310 of the two optical fiber connectors 300 in any connection subset are coaxially arranged, the trigger optical fiber 500 is arranged in the jack 310 of one optical fiber connector 300 in the connection subset, the return optical fiber 600 is arranged in the jack 310 of the other optical fiber connector 300 in the connection subset, the trigger optical fiber 500 and the return optical fiber 600 are signal connected with the valve control 700, so as to form an overall optical signal loop. The connection subset is arranged at least in four groups, the connection subsets in each group are uniformly arranged, the specific number can be arranged according to needs, and the four or more connection subsets constitute a redundant structure design, when the converter valve water leakage detector 10 detects whether water leakage occurs, the data of multiple groups can be used for judgment, when two or more groups of data are abnormal, it can be judged that the valve body leaks, compared with the single group data mode, the detection accuracy is improved.

[0045] Referring to Figure 3The collimator 400 is positioned at the end of the optical fiber connector 300 near the jack 310 of the light shield 200. The collimator 400 near the trigger fiber 500 is referred to as the first collimator 410, and the collimator 400 near the feedback fiber 600 is referred to as the second collimator 420. The collimator 400 collimates and focuses the optical signal, ensuring that the optical signal sent from the control valve 700 to the water leak detector is returned to the control valve 700 to the maximum extent possible, thereby improving optical signal reliability. Within any connected subset, the first collimator 410 and the second collimator 420 should be coaxially arranged to ensure the transmission and transfer of the optical signal. If there is no collimation structure between the trigger fiber 500 and the feedback fiber 600, the optical signal will be a divergent beam when emitted from the trigger fiber 500, resulting in low coupling efficiency with the feedback fiber 600. The first collimator 410 converts the divergent light beam into a parallel light beam. After the parallel light beam reaches the second collimator 420, it is coupled into the feedback fiber 600, which can greatly improve the incident efficiency between the feedback fiber 600 and the reliability of the water leakage detection optical signal.

[0046] In one embodiment, a fiber optic adapter 100 includes a housing 110, wherein a slot is provided within the housing 110. A buckle is provided on the periphery of the fiber optic connector 300 that corresponds to the slot of the housing 110. The slot and buckle are fixedly connected. The shape, size, and other parameters of the slot and buckle are not limited herein. Any slot and buckle forms existing in the prior art can be applied to this application. The fiber optic adapter 100 reliably secures and limits the position of the fiber optic connector 300. The device for securing the fiber optic connector 300 of the water leak detector involved in this application can securely install the fiber optic connector 300, preventing it from loosening, and preventing the fiber optic connector 300 from falling off due to long-term vibration during the operation of the converter valve. This ensures the overall stability of the converter valve water leakage detector 10 during operation and greatly improves the reliability of the converter valve water leakage detection.

[0047] In another embodiment, the fiber optic adapter 100 includes a shell 110, which is in the shape of a long box. A buckle is provided inside the shell 110, and a slot corresponding to the buckle of the shell 110 is provided on the outer periphery of the fiber optic connector 300, and the slot is fixedly connected to the buckle; the fiber optic adapter 100 reliably fixes the fiber optic connector 300 and limits the fiber optic connector 300, thereby ensuring the overall stability of the converter valve water leakage detector 10 during operation.

[0048] In one of the embodiments, a resilient member such as a spring, rubber plate, foam plate or the like can be arranged at the gap between the fiber adapter 100 and the fiber connector 300. Since the fiber adapter 100 is internally provided with optical components, the working accuracy is high, and thus it is necessary to avoid the internal part of the fiber adapter 100 from being affected by excessive external force. After the resilient member is arranged, the influence of external force on the optical components in the internal part of the fiber adapter 100 can be reduced, and the situation that the detection accuracy is reduced or even the internal structure is damaged can be avoided.

[0049] In one of the embodiments, the housing 110 of the fiber adapter 100 is provided with at least three main channels 120 on both sides in the radial direction. The main channels 120 are connected to the internal part of the housing 110, and each main channel 120 corresponds to each connection subset in sequence. The main channel 120 has an outgoing port and an incoming port, which are respectively located on both sides of the housing 110. The trigger fiber 500 is inserted into the corresponding insertion hole 310 through the outgoing port, and the return fiber 600 is inserted into the corresponding insertion hole 310 through the incoming port. The redundant structure of the main channel 120 can avoid the false alarm of water leakage detection caused by the failure of a single channel. Taking the three main channels 120 as an example, when all the three main channels 120 are working normally, if the signal of one of the channels changes, it is not considered as a water leakage detection alarm. Only when the signals of at least two of the three channels change, it is considered as a water leakage detection alarm. In addition, the fiber adapter 100 is also provided with at least one standby channel 130. The size specifications of the standby channel 130 are the same as those of the main channel 120. The trigger fiber 500 and the return fiber 600 are also arranged in the standby channel 130, and the trigger fiber 500 and the return fiber 600 at this position are also connected to the fiber connector 300. The arrangement of the standby channel 130 can realize the function of online replacement of standby fibers without shutdown. Taking the three main channels 120 as an example, if the three main channels 120 do not fail, the trigger fiber 500 and the return fiber 600 of the standby channel 130 are not connected at the control valve 700. At this time, the standby channel 130 is not used and is in an idle state. If one of the three main channels 120 fails, the trigger fiber 500 and the return fiber 600 of the standby channel 130 are connected at the control valve 700. Then, the connection port at the control valve 700 can be directly replaced with a standby fiber, and the standby channel 130 is enabled without the need to shut down the converter valve tower. The online replacement can be realized without the need for operators to enter the site, and the effect of rapid replacement is realized, and the working hours are saved. As a preferred embodiment, the number of connection subsets is equal to the sum of the numbers of the main channels 120 and the standby channels 130, so as to avoid the arrangement of too many channels, increase the idle components, and cause the waste of resources.

[0050] In one of the embodiments, the control valve 700 is connected with the trigger optical fiber 500 and the feedback optical fiber 600 respectively, the control valve 700 is opened, the control valve 700 can emit the trigger signal to the trigger optical fiber 500, the trigger optical fiber 500 radiates the trigger signal through the light transmission hole 210 of the light shielding body 200 and forms the feedback signal, the feedback signal is transmitted to the control valve 700 through the feedback optical fiber 600, and the control valve 700 can determine whether the valve body leaks water according to the number of the feedback signal.

[0051] In one of the embodiments, the control valve 700 is electrically connected with the alarm device, the alarm device can be a high-brightness marquee or a high-frequency buzzer, etc., when the detector leaks water, the marquee or the buzzer can timely warn the operator to repair.

[0052] In one of the embodiments, the alarm device can also be an electronic prompt screen, the connection of each channel of the detector can be displayed on the electronic prompt screen, which is convenient for the operator to detect the operation of the detector, and the water leakage signal is displayed when the detector leaks water, which is convenient for the operator to repair and improves the troubleshooting efficiency.

[0053] Referring to Figure 3 and Figure 4 , the application further provides a detection method of the converter valve water leakage detector 10, which is applied to the converter valve water leakage detector 10 and includes the following steps.

[0054] S100, the control valve 700 emits N groups of trigger signals, wherein the number of N is greater than or equal to three groups;

[0055] S200, the light shielding body 200 floats up and down with the change of the water level of the water storage tank 900, the position of the light shielding body 200 changes relative to the position of the optical fiber connector 300 to allow or prevent the trigger signal from passing through the light shielding body to form the feedback signal;

[0056] S300, the control valve 700 receives the feedback signal and determines the water leakage state according to the number of the feedback signal.

[0057] In one of the embodiments, before the step S100 of emitting N groups of trigger signals by the control valve 700, the method further includes the steps of presetting the signal data of the trigger signal and the signal intensity of the trigger signal, in which reasonable signal data and signal intensity are set to ensure that the signal attenuation is within the allowable range when the trigger signal radiates through the light transmission hole 210, and to ensure that the feedback signal is successfully received by the control valve 700 in the state of generating the feedback signal.

[0058] In one of the embodiments, the step S100 of sending N groups of trigger signals by the control valve 700 includes the step of sending trigger signals by the control valve 700 to the trigger optical fiber 500, and the trigger optical fiber 500 emits the trigger signals through the first collimating member 410 of the collimating body 400. It is noted that the connection between the control valve 700 and the trigger optical fiber 500 is firm to avoid false detection.

[0059] In one of the embodiments, the step of allowing or blocking the trigger signals to pass through the light blocking body to form the feedback signals includes

[0060] S210, when the converter valve leaks, no feedback signal is generated, the floating body 800 drives the light blocking body 200 to float upwards, the trigger signal fails to pass through the light transmission hole 210 of the light blocking body 200, and cannot be coupled to form the feedback signal. In this case, the converter valve does not leak, the water level in the water storage tank 900 does not rise, and the floating body 800 and the light blocking body 200 remain stationary. At this time, the light transmission hole 210 and the insertion hole 310 are in the same straight line, and the trigger signal at the trigger optical fiber 500 passes through the light transmission hole 210 to form the feedback signal.

[0061] S220, when the converter valve does not leak, the feedback signal is generated, the floating body 800 is stationary, the trigger signal passes through the light transmission hole 210 of the light blocking body 200 to form the feedback signal. In this case, the leaked liquid at the leakage point is guided into the water storage tank 900 of the valve body. As the amount of leaked liquid increases, the floating body 800 drives the light blocking body 200 to float upwards, and the position of the light transmission hole 210 of the light blocking body 200 moves upwards relative to the insertion hole 310 of the optical fiber connector 300. At this time, the light transmission hole 210 and the insertion hole 310 are not in the same straight line, the trigger signal at the trigger optical fiber 500 cannot pass through the light transmission hole 210 to form the feedback signal, but is blocked or reflected by the remaining part of the light blocking body 200.

[0062] In one of the embodiments, the step of receiving the feedback signal by the control valve 700 includes the step of receiving the feedback signal that passes through the light blocking body 200 by the feedback optical fiber 600 through the collimating body 400 and feeding back to the control valve 700. It is noted that the connection between the control valve 700 and the feedback optical fiber 600 is firm to avoid false detection.

[0063] In one of the embodiments, the step of determining the leakage state by the control valve 700 includes

[0064] S310, the control valve 700 collects at most N-2 groups of feedback signals, and determines that the converter valve leaks. In this case, two or more groups of feedback signals fail to be transmitted to the control valve 700, which excludes the possibility of false detection of a single signal.

[0065] S320, the valve control 700 collects N groups or N-1 groups of return signals, and determines that the converter valve has not occurred water leakage. In this case, each component remains relatively static, and all generated return signals can be received by the valve control 700. In addition, there can be a special condition in which only one group of return signals cannot be collected, which can be caused by normal mechanical vibration of the converter valve or external sudden external force. The actual converter valve does not have a water leakage condition, so this state is also determined as the converter valve not having water leakage, to avoid false detection.

[0066] The technical features of the above-described embodiments can be combined in any manner. For brevity, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0067] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A converter valve leakage detector, characterized in that: include: The optical fiber adapter is provided with at least one spare channel, and the spare channel is connected online during the operation of the converter valve; A light shielding body, passing through the optical fiber adapter, and having a light-transmitting hole; the light shielding body is a grating; A fiber optic connector is fixedly connected to the interior of the fiber optic adapter. Two fiber optic connectors are coaxially and symmetrically arranged on either side of the light shield. The fiber optic connectors have insertion holes corresponding to the positions of the light transmission holes. A trigger fiber and a feedback fiber are respectively inserted into the two insertion holes. The light shield floats up and down with changes in the water level in the water storage tank, causing the position of the light transmission hole and the position of the insertion holes to change relative to each other. A collimator, provided at the end of the jack close to the light shielding body; as well as The control valve is respectively connected to the trigger optical fiber and the feedback optical fiber signal.

2. The converter valve water leakage detector according to claim 1, characterized in that: The bottom end of the light-shielding body is fixedly connected with a floating body, and the floating body drives the light-shielding body to float up and down.

3. The converter valve water leakage detector according to claim 1, characterized in that: The two optical fiber connectors coaxially and symmetrically arranged on both sides of the light-shielding body form a connection subset, and there are at least four connection subsets.

4. The converter valve water leakage detector according to claim 3, characterized in that: The optical fiber adapter is provided with at least three main channels, and the trigger optical fiber and the feedback optical fiber are respectively passed through the two sides of the main channels.

5. A detection method for a converter valve water leakage detector, characterized in that: The converter valve water leakage detector according to any one of claims 1 to 4 comprises: The control valve transmits N groups of trigger signals; The light shield floats up and down as the water level in the water storage tank changes. The position of the light shield and the position of the optical fiber connector change relative to each other to allow or prevent the trigger signal from passing through the light shield to form a feedback signal. The control valve receives the feedback signal and determines the water leakage status according to the number of the feedback signals.

6. The detection method of the converter valve water leakage detector according to claim 5, characterized in that: The steps to determine the leakage status of the control valve include: The control valve collects at most N-2 groups of feedback signals to determine whether the converter valve is leaking; The control valve collects N groups or N-1 groups of feedback signals to determine that there is no water leakage in the converter valve.

7. The detection method of the converter valve water leakage detector according to claim 5, characterized in that: The step of the control valve receiving the feedback signal includes the following steps: the feedback optical fiber receives the feedback signal penetrating the light shielding body through the collimator and feeds the feedback signal back to the control valve.

8. The detection method of the converter valve water leakage detector according to claim 7, characterized in that: The steps of allowing or preventing the trigger signal from passing through the light shield to form a feedback signal include: When the converter valve is not leaking, the floating body is stationary, the light-transmitting hole and the socket are in the same straight line, and the trigger signal passes through the light-transmitting hole of the light-shielding body and is coupled to form a feedback signal; When the converter valve leaks, the floating body drives the light-shielding body to float upward, the light-transmitting hole and the socket are not in the same straight line, the light-shielding body blocks or reflects the trigger signal, the trigger signal fails to pass through the light-transmitting hole of the light-shielding body, and cannot be coupled to form a feedback signal.

9. The detection method of the converter valve water leakage detector according to claim 5, characterized in that: The step of controlling the valve to send N groups of trigger signals includes controlling the valve to send the trigger signals to a trigger optical fiber, and the trigger optical fiber transmits the trigger signals through a collimator.

10. The detection method of the converter valve water leakage detector according to claim 9, characterized in that: Before the valve control sends the trigger signal to the multiple trigger optical fibers, the method also includes the steps of presetting the signal data of the trigger signal and presetting the signal strength of the trigger signal.

Images