A foreign matter intercepting device for a vacuum excrement collecting system of a motor train unit

Abstract

This invention discloses a foreign object interception device for a vacuum toilet system in high-speed trains, comprising: a guide column section whose upper end directly connects to the toilet's drain outlet; a locking and disassembly assembly / disassembly component allows for the assembly / disassembly of the guide column section, guide cone section, and interception column section; sealing rings are fitted at each connection point and are press-fitted to the cone to effectively prevent external air infiltration and stably maintain the vacuum suction of the toilet collection pipeline; a built-in monitoring device equipped with a non-contact distance sensor collects real-time data on the height of internal foreign object accumulation; a micro control unit, combined with preset thresholds, classifies warning states and provides tiered alerts with indicator lights. This invention can predict potential pipeline blockages in advance, significantly reducing the frequency of manual unclogging and simplifying daily maintenance operations.

Description

Technical Field

[0001] This invention belongs to the technical field of rail transit vehicle equipment and relates to a foreign object interception device for a vacuum toilet system of a high-speed train. Background Technology

[0002] Vacuum toilets on high-speed trains rely on negative pressure in their pipes to transport waste. However, the pipe diameter is relatively small, making them prone to blockage by various foreign objects during daily operation. This has been a frequent and persistent problem in rail transit maintenance. Discarded items such as sanitary napkins, diapers, wet wipes, and hard forks can cause blockages and entanglement in the sewage pipes. Paper-based foreign objects expand significantly when they come into contact with water, further exacerbating the blockage. Hard objects can also scratch the sealing layer of the pipe valves, compromising the system's vacuum level. This can lead to toilet closures affecting passenger experience, or even require complete valve replacement, significantly increasing spare parts consumption.

[0003] Currently, the industry's approach to dealing with toilet blockages is mostly reactive repair, lacking source interception devices. When a malfunction occurs and the train returns to the depot for maintenance, repair personnel need to expend a significant amount of manpower to clear the pipes, and in some cases, manual removal of debris is required, resulting in low efficiency and high labor intensity. Existing simple interception structures can only achieve basic debris blocking functions, and have drawbacks such as cumbersome disassembly and assembly, poor sealing leading to vacuum leaks, and inability to predict the degree of blockage. Train attendants and maintenance personnel can only passively discover blockages, unable to anticipate the accumulation of debris inside the interception components, making planned maintenance difficult, resulting in significant delays in fault handling and continuously increasing the operation and maintenance costs of high-speed trains. At the same time, the installation space in high-speed train toilets is limited, and the external structure of traditional interception devices protrudes, occupying installation space and being easily damaged by bumps; most interception structures lack sealing and protection designs, making them prone to air leaks and component loosening under negative pressure in the pipes, compromising the suction capacity of the vacuum toilet system and frequently causing poor sewage discharge. Therefore, there is an urgent need for a miniaturized, quick-release, and sealing pre-positioning interception device that can monitor the accumulation of debris in real time, thereby blocking foreign objects from entering the downstream pipelines at the source, realizing proactive early warning of blockage faults, and changing the existing passive repair operation and maintenance mode. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the existing technology of vacuum toilet systems for high-speed trains, such as the lack of pre-interception means for foreign objects at the source, the inability to clear blockages after they occur, the cumbersome disassembly and assembly of the interception device, the lack of sealing protection, and the inability to monitor the accumulation of debris in real time. The invention provides a foreign object interception device for vacuum toilet systems for high-speed trains.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A foreign object interception device for a vacuum toilet system of a high-speed train includes: a guide column section, a locking and disassembly assembly, a guide cone section, an interception column section, and a monitoring device; The upper end of the guide column section is connected to the sewage outlet; the guide column section is located at the upper end of the guide cone section, and the lower end of the guide column section is connected and separated from the guide cone section through a locking and disassembly assembly; the interception column section is located at the lower end of the guide cone section; the guide cone section is connected and separated from the interception column section through a locking and disassembly assembly; the internal flow diameter of the interception column section is smaller than the diameter of the upper guide column section, and is used to intercept foreign objects exceeding the internal flow diameter of the interception column section; the monitoring device is located inside the guide cone section, and is used to monitor the accumulation status of foreign objects at the bottom of the interception column section and send the monitoring information to the staff.

[0006] A further improvement of the present invention is that: Furthermore, the upper end of the flow guide column is provided with a handle and a handle concealment chamber. The handle concealment chamber is located at the top of the flow guide column, and the handle can be completely stored inside the handle concealment chamber.

[0007] Furthermore, the locking and disassembly assembly includes: a locking claw, a locking boss, a guide portion, and an unlocking groove; both the guide column section and the intercepting column section are provided with locking claws; both the upper and lower ends of the guide cone section are provided with annular grooves and guide portions, and the locking boss is disposed within the annular groove; the unlocking groove is disposed on the outer side of the guide cone section; the locking boss and the unlocking groove are alternately arranged along the outer wall of the guide cone section; when the guide column section and the guide cone section are locked together, the conical slope of the guide portion expands the locking claw, and then the locking claw engages with the locking boss to achieve locking; the locking claw is a cone section guide locking device with a guide slope engaging the boss; the connection method between the guide column section and the guide cone section is exactly the same as the connection method between the guide cone section and the intercepting column section.

[0008] Furthermore, the lower end of the guide column section is connected and separated from the guide cone section through a locking and disassembly assembly. Specifically, the lower end of the guide column section is placed on the upper end of the guide cone section, and the conical slope of the guide part opens the locking claw. The claw head wraps around and fits against the outer circular surface of the guide part of the guide cone section from the outside. The guide column section is rotated circumferentially, thereby driving the locking claw so that the claw head aligns and fits against the outer side of the locking boss. The locking boss protrudes outward, forming a radial blocking limit on the locking claw, and the locking claw and the locking boss engage with each other. The guide column section is rotated circumferentially in the opposite direction, thereby driving the locking claw so that the claw head rotates to the corresponding position of the unlocking groove, separating the guide column section and the guide cone section.

[0009] Furthermore, the outer sides of the guide column section and the interception column section are provided with locking sleeves with anti-slip textures at the positions corresponding to the unlocking grooves. The outer side of the locking sleeve is provided with a pushing slope that is adapted to the locking claw and abuts against the locking claw.

[0010] Furthermore, both the guide column section and the interception column section are equipped with sealing rings inside. The sealing rings are in an interference fit with the guide cone of the guide cone section. The sealing rings are tightly fitted to the inner walls of the guide column section and the interception column section respectively, preventing external air from seeping in and disrupting the vacuum sewage suction.

[0011] Furthermore, the inner wall of the guide column section is provided with a first fluid channel, and the inner walls of the guide cone section and the interception column section are provided with a second fluid channel; the first fluid channel and the second fluid channel form a continuous and interconnected vacuum sewage discharge channel; and a guide arc surface is provided at the connection between the first fluid channel and the second fluid channel.

[0012] Furthermore, the monitoring device includes: a non-contact distance sensor, a micro control unit, and a wireless communication module; the non-contact distance sensor is installed on the inner wall of the interception column, and the distance sensor is externally connected to the micro control unit; the micro control unit is electrically connected to the wireless communication module; the non-contact distance sensor measures the distance from the non-contact distance sensor to the bottom of the interception column or the surface where foreign objects have accumulated in real time; the micro control unit judges the distance to the foreign object and sends the information to the staff through the wireless communication module.

[0013] Furthermore, the micro control unit determines the height of foreign object accumulation based on the information transmitted by the non-contact distance sensor. When the height of foreign object accumulation reaches a preset first threshold, the micro control unit determines it to be in a "needs attention" state; when the accumulation height reaches a second threshold, the micro control unit determines it to be in a "urgent need for cleaning" state; when the height of foreign object accumulation reaches the first threshold or the second threshold, the micro control unit reminds the staff by controlling different colored indicator lights; the second threshold is greater than the first threshold.

[0014] Furthermore, the non-contact distance sensor, the micro control unit, and the wireless communication module are connected to an external power supply module, which supplies power to the non-contact distance sensor, the micro control unit, and the wireless communication module; the wireless communication module is a low-power Bluetooth or LoRa module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention connects the upper end of the guide column directly to the toilet drain outlet. The guide column, guide cone, and interception column are assembled and disassembled using a locking and disassembly assembly. Sealing rings are fitted at each connection point and press-fitted to the cone, effectively preventing external air intrusion and maintaining stable vacuum suction in the sewage collection pipe. A built-in monitoring device with a non-contact distance sensor collects real-time data on the height of foreign objects accumulated inside the pipe. A micro-control unit, combined with preset thresholds, classifies warning states and provides tiered alerts with indicator lights. This invention can predict potential pipe blockages in advance, significantly reducing the frequency of manual unclogging and simplifying daily maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the foreign object interception device of the vacuum toilet system for high-speed trains according to the present invention; Figure 2 This is a front view of the foreign object interception device in the vacuum toilet system of a high-speed train. Figure 3 A top view of the foreign object interception device in the vacuum toilet system of a high-speed train; Figure 4 A schematic diagram of the intelligent early warning and information transmission process for the foreign object interception device in the vacuum toilet system of high-speed trains.

[0018] Among them, 1-handle, 2-handle concealed chamber, 3-guide column section, 4-locking claw, 5-unlocking groove, 6-locking boss, 7-guide cone section, 8-interception column section. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 , Figure 2 and Figure 3 This invention discloses a foreign object interception device for a vacuum toilet system of a high-speed train, comprising: a guide column section 3, a locking and disassembly assembly, a guide cone section 7, an interception column section 8, and a monitoring device; The upper end of the guide column section 3 is connected to the sewage outlet; the guide column section 3 is located at the upper end of the guide cone section 7, and the lower end of the guide column section 3 is connected to and separated from the guide cone section 7 through a locking and disassembly assembly; the interception column section 8 is located at the lower end of the guide cone section 7; the guide cone section 7 is connected to and separated from the interception column section 8 through a locking and disassembly assembly; the internal flow diameter of the interception column section 8 is smaller than the diameter of the upper guide column section 3, and is used to intercept foreign objects exceeding the internal flow diameter of the interception column section 8; the monitoring device is located inside the guide cone section 7, and is used to monitor the accumulation status of foreign objects at the bottom of the interception column section 8, and send the monitoring information to the staff.

[0026] The upper end of the flow guide column section 3 is provided with a handle 1 and a handle hiding chamber 2. The handle hiding chamber 2 is opened at the top of the flow guide column section 3, and the handle 1 can be completely stored inside the handle hiding chamber 2.

[0027] The locking and disassembly assembly includes: a locking claw 4, a locking boss 6, a guide portion, and an unlocking groove 5; both the guide column section 3 and the intercepting column section 8 are provided with locking claws 4; both the upper and lower ends of the guide cone section 7 are provided with annular grooves and guide portions, and the locking boss 6 is located in the annular groove; the unlocking groove 5 is located on the outer side of the guide cone section 7; the locking boss 6 and the unlocking groove 5 are alternately arranged along the outer wall of the guide cone section 7; when the guide column section 3 and the guide cone section 7 are locked together, the conical slope of the guide portion opens the locking claw 4, and then the locking claw 4 engages with the locking boss 6 to achieve locking; the locking claw 4 is a cone section guide locking device with a guide slope engaging the boss; the connection method between the guide column section 3 and the guide cone section 7 is exactly the same as the connection method between the guide cone section 7 and the intercepting column section 8.

[0028] The lower end of the guide column section 3 is connected to and separated from the guide cone section 7 via a locking and disassembly assembly. Specifically, the lower end of the guide column section 3 is placed on the upper end of the guide cone section 7, and the conical slope of the guide part opens the locking claw 4. The claw head of the locking claw 4 wraps around and fits against the outer circular surface of the guide part of the guide cone section 7 from the outside. The guide column section 3 is rotated circumferentially, thereby driving the locking claw 4 so that the claw head of the locking claw 4 aligns and fits against the outer side of the locking boss 6. The locking boss 6 protrudes outward, forming a radial blocking limit on the locking claw 4. The locking claw 4 and the locking boss 6 engage with each other. The guide column section 3 is rotated circumferentially in the opposite direction, thereby driving the locking claw 4 so that the claw head of the locking claw 4 rotates to the corresponding position of the unlocking groove 5, separating the guide column section 3 from the guide cone section 7.

[0029] The outer sides of the guide column section 3 and the interception column section 8 are provided with locking sleeves with anti-slip textures corresponding to the unlocking groove 5. The outer side of the locking sleeve is provided with a pushing slope that is adapted to the locking claw 4 and abuts against the locking claw 4.

[0030] Both the guide column section 3 and the interception column section 8 are equipped with sealing rings inside. The sealing rings are in an interference fit with the guide cone of the guide cone section 7. The sealing rings are tightly fitted to the inner walls of the guide column section 3 and the interception column section 8 respectively, preventing external air from seeping in and disrupting the vacuum sewage suction.

[0031] The inner wall of the guide column section 3 is provided with a first fluid channel, and the inner walls of the guide cone section 7 and the interception column section 8 are provided with a second fluid channel; the first fluid channel and the second fluid channel form a continuous and interconnected vacuum sewage discharge channel; and a guide arc surface is provided at the connection between the first fluid channel and the second fluid channel.

[0032] The monitoring device includes: a non-contact distance sensor, a micro control unit, and a wireless communication module; the non-contact distance sensor is installed on the inner wall of the interception column segment 8, and the distance sensor is externally connected to the micro control unit; the micro control unit is electrically connected to the wireless communication module; the non-contact distance sensor measures the distance from the non-contact distance sensor to the bottom of the interception column segment 8 or the surface where foreign objects have accumulated in real time; the micro control unit judges the distance to the foreign objects and sends the information to the staff through the wireless communication module.

[0033] The micro control unit determines the height of foreign object accumulation based on information transmitted by the non-contact distance sensor. When the height of foreign object accumulation reaches a preset first threshold, the micro control unit determines it to be in a "needs attention" state; when the accumulation height reaches a second threshold, the micro control unit determines it to be in a "urgent need for cleaning" state; when the height of foreign object accumulation reaches either the first or the second threshold, the micro control unit alerts the staff by controlling indicator lights of different colors; the second threshold is greater than the first threshold.

[0034] The non-contact distance sensor, micro control unit, and wireless communication module are connected to an external power supply module, which supplies power to the non-contact distance sensor, micro control unit, and wireless communication module; the wireless communication module is a low-power Bluetooth or LoRa module.

[0035] Example: First, precisely connect the guide column section 3 to the sewage outlet of the train's toilet, using a sealed connection method to ensure a secure connection and prevent leakage during sewage discharge. Then, connect and lock the guide cone section 7 to the guide column section 3 using locking claws 4 and locking bosses 6 to complete the overall installation of the device. During daily use, the interception column section 8 will automatically intercept excessive foreign objects. Regular sewage, under the suction of the vacuum sewage collection system and guided by the tapered conical structure, will smoothly pass through the device and enter the sewage collection system. When foreign objects accumulate to a certain level in the interception column section 8, the operator slides the locking sleeve along the unlocking groove 5 to unlock and separate the guide cone section 7 from the guide column section 3, clean the foreign objects in the interception column section 8, and then reconnect and lock the guide cone section 7 to the guide column section 3 to restore the device to normal operation. The device adopts a tapered, tapering structure, relying on fluid mechanics principles to effectively reduce airflow resistance during sewage discharge, guiding waste to flow downwards rapidly. Simultaneously, the inclined angle of the conical inner wall reduces the adhesion and accumulation of waste on the inner wall, achieving an automatic anti-clogging effect and reducing subsequent maintenance frequency. Specifically, the inner wall of the guide column section 3 has a first fluid channel, while the inner walls of the guide cone section 7 and the interception column section 8 have second fluid channels. These two channels are interconnected, and the connection point is equipped with a guide arc surface to further reduce the resistance to the passage of waste and airflow, ensuring a smooth sewage discharge process and preventing waste retention and blockage caused by sharp edges at the channel connection points.

[0036] The guide column section 3 and the guide cone section 7 are detachably connected. They are quickly locked and unlocked via the locking claw 4, unlocking groove 5, and locking boss 6, facilitating the subsequent cleaning of foreign objects trapped within the interception column section 8. For easy unlocking and disassembly, a locking sleeve with anti-slip texture is slidably fitted on the outer side of the guide column section 3, corresponding to the unlocking groove 5. The outer side of this locking sleeve has a pushing bevel that abuts against the locking claw 4. When unlocking is required, simply slide the locking sleeve along the direction of the unlocking groove 5. The pushing bevel will compress the locking claw 4, causing it to disengage from the locking boss 6, quickly separating the guide cone section 7 from the guide column section 3, thus allowing for the cleaning of foreign objects within the interception column section 8. The operation is convenient and efficient, requiring no additional tools.

[0037] To prevent vacuum leakage in the vacuum waste collection system and affect the sewage discharge effect, the guide column section 3 is equipped with a sealing ring. This sealing ring forms an interference fit with the guide part of the guide cone section 7 and fits tightly against the hole wall, forming a double sealing structure. This effectively prevents air from entering, ensures the vacuum degree of the vacuum waste collection system, and guarantees stable sewage discharge suction.

[0038] The handle 1 adopts an arc-shaped structure design, which is suitable for human hand grip and facilitates the installation and disassembly of the device. The handle concealment chamber 2 is opened at the top of the guide column section 3. The handle 1 can be completely stored in the handle concealment chamber 2. After being stored, it does not protrude from the outer surface of the device, avoiding taking up extra space. It is suitable for the narrow installation environment of the toilet of the EMU, while preventing the handle 1 from being damaged by collision and extending the service life of the device.

[0039] During normal operation of the device, the non-contact distance sensor continuously emits signals such as ultrasonic pulses or infrared beams into the interception column 8 and receives reflected signals, thereby measuring the distance from the sensor to the bottom of the interception column 8 or the surface where foreign objects have accumulated in real time.

[0040] The miniature control unit receives distance data measured by sensors and compares it with preset thresholds. When the height of the accumulated foreign object reaches the first preset threshold, for example, 70% of the height of the interceptor column, the control unit determines that it is in a "needs attention" state; when the accumulated height reaches the second threshold, for example, 90% of the height of the interceptor column, the control unit determines that it is in a "urgent need for cleaning" state.

[0041] When the first threshold is reached, the status indicator light turns yellow, alerting maintenance personnel that the device needs cleaning soon. Simultaneously, the micro-control unit transmits warning information, such as device ID, status, and accumulation level, via wireless communication to the train's central maintenance system or the crew's handheld terminal, allowing maintenance personnel to plan cleaning tasks in advance.

[0042] When the second threshold is reached, the status indicator light turns red and may flash, indicating that the device is nearing full load and requires immediate cleaning to avoid affecting the sewage discharge function. Simultaneously, a higher-level emergency warning will be sent to the central maintenance system, triggering an emergency maintenance procedure. After maintenance personnel follow the "cleaning and maintenance" steps in the technical solution to separate the guide cone section 7 and remove foreign objects from the interceptor column section 8, the sensor will detect that the distance has returned to normal. The control unit will automatically turn off the status indicator light or display it green and send a "cleaned" feedback message to the central maintenance system, completing the entire monitoring and warning cycle.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A foreign object interception device for a vacuum toilet system in high-speed trains, characterized in that, include: The flow guide column section (3), the locking and disassembly assembly, the flow guide cone section (7), the interception column section (8), and the monitoring device; The upper end of the guide column section (3) is connected to the sewage outlet; the guide column section (3) is set at the upper end of the guide cone section (7), and the lower end of the guide column section (3) is connected and separated from the guide cone section (7) through a locking and disassembly assembly; the interception column section (8) is set at the lower end of the guide cone section (7); the guide cone section (7) is connected and separated from the interception column section (8) through a locking and disassembly assembly; the internal flow diameter of the interception column section (8) is smaller than the diameter of the upper guide column section (3), and is used to intercept foreign objects that exceed the internal flow diameter of the interception column section (8); the monitoring device is set inside the guide cone section (7) and is used to monitor the accumulation status of foreign objects at the bottom of the interception column section (8) and send the monitoring information to the staff.

2. The foreign object interception device for a vacuum toilet system in a high-speed train according to claim 1, characterized in that, The upper end of the flow guide column section (3) is provided with a handle (1) and a handle hiding chamber (2). The handle hiding chamber (2) is opened at the top of the flow guide column section (3), and the handle (1) is fully housed inside the handle hiding chamber (2).

3. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 2, characterized in that, The locking and disassembly assembly includes: a locking claw (4), a locking boss (6), a guide portion, and an unlocking groove (5); Both the guide column section (3) and the intercepting column section (8) are provided with locking claws (4); both the upper and lower ends of the guide cone section (7) are provided with annular grooves and guide parts, and the locking boss (6) is provided in the annular groove; the unlocking groove (5) is provided on the outside of the guide cone section (7); the locking boss (6) and the unlocking groove (5) are arranged alternately along the outer wall of the guide cone section (7); when the guide column section (3) and the guide cone section (7) are locked, the conical slope of the guide part opens the locking claw (4), and then the locking claw (4) and the locking boss (6) engage to achieve locking; the locking claw (4) is a cone section guide locking device with a guide slope engaging boss; the connection method between the guide column section (3) and the guide cone section (7) is exactly the same as the connection method between the guide cone section (7) and the intercepting column section (8).

4. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 3, characterized in that, The lower end of the guide column section (3) is connected and separated from the guide cone section (7) through a locking and disassembly assembly. Specifically, the lower end of the guide column section (3) is placed on the upper end of the guide cone section (7), the conical slope of the guide part opens the locking claw (4), and the claw head of the locking claw (4) wraps around and fits the outer circular surface of the guide part of the guide cone section (7) from the outside; the guide column section (3) is rotated circumferentially, thereby driving the locking claw (4) so ​​that the claw head of the locking claw (4) is aligned and fits the outer side of the locking boss (6); the locking boss (6) protrudes outward, forming a radial blocking limit on the locking claw (4), and the locking claw (4) and the locking boss (6) are engaged with each other; the guide column section (3) is rotated circumferentially in the opposite direction, thereby driving the locking claw (4) so ​​that the claw head of the locking claw (4) rotates to the corresponding position of the unlocking groove (5), separating the guide column section (3) and the guide cone section (7).

5. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 4, characterized in that, The outer sides of the guide column section (3) and the interception column section (8) are provided with locking sleeves with anti-slip textures corresponding to the unlocking groove (5). The outer side of the locking sleeve is provided with a pushing slope that is adapted to the locking claw (4) and abuts against the locking claw (4).

6. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 5, characterized in that, Both the guide column section (3) and the interception column section (8) are equipped with sealing rings. The sealing rings are in an interference fit with the guide cone of the guide cone section (7). The sealing rings are tightly fitted to the inner walls of the guide column section (3) and the interception column section (8) respectively, preventing external air from infiltrating and disrupting the vacuum sewage suction.

7. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 6, characterized in that, The inner wall of the guide column section (3) is provided with a first fluid channel, and the inner walls of the guide cone section (7) and the interception column section (8) are provided with a second fluid channel; the first fluid channel and the second fluid channel form a continuous and interconnected vacuum sewage discharge channel; and a guide arc surface is provided at the connection between the first fluid channel and the second fluid channel.

8. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 7, characterized in that, The monitoring device includes: a non-contact distance sensor, a micro control unit, and a wireless communication module; the non-contact distance sensor is installed on the inner wall of the intercepting column section (8), and the distance sensor is externally connected to the micro control unit; the micro control unit is electrically connected to the wireless communication module; the non-contact distance sensor measures the distance from the non-contact distance sensor to the bottom of the intercepting column section (8) or the surface of the accumulated foreign object in real time; the micro control unit judges the distance to the foreign object and sends the information to the staff through the wireless communication module.

9. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 8, characterized in that, The micro control unit determines the height of foreign object accumulation based on information transmitted by the non-contact distance sensor. When the height of foreign object accumulation reaches a preset first threshold, the micro control unit determines it to be in a "needs attention" state; when the accumulation height reaches a second threshold, the micro control unit determines it to be in a "urgent need for cleaning" state; when the height of foreign object accumulation reaches either the first or the second threshold, the micro control unit alerts the staff by controlling indicator lights of different colors; the second threshold is greater than the first threshold.

10. A foreign object interception device for a vacuum toilet system in a high-speed train according to claim 9, characterized in that, The non-contact distance sensor, micro control unit, and wireless communication module are connected to an external power supply module, which supplies power to the non-contact distance sensor, micro control unit, and wireless communication module; the wireless communication module is a low-power Bluetooth or LoRa module.

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