A type of antifreeze valve device for high-speed trains

Abstract

This invention discloses an antifreeze valve device for high-speed trains, comprising a ball valve with pipes installed at both ends. Two interlocking upper and lower covers are provided on the outer side of the ball valve. The upper and lower covers have identical structures, each including an arched portion protruding outwards from the center, and also including contracted portions extending to both ends of the arched portion. The upper and lower covers seal the ball valve within a closed cavity. Liquid flow channels are formed within the side walls of the upper and lower covers. A controller is fixed to the outer side of the upper cover, integrating a control system and a heater and a water pump connected in series. The water pump delivers water from the closed cavity through the liquid flow channels to the heater, heats it, and then discharges it back into the closed cavity. This invention achieves uniform heating through hot water circulation, ensuring the valve body does not freeze or become stuck; it provides good sealing, temporarily containing leaked water and preventing overflow.

Description

Technical Field

[0001] This invention relates to an antifreeze valve device for high-speed trains, belonging to the technical field of antifreeze valves for high-speed trains. Background Technology

[0002] When high-speed trains operate in low-temperature environments (such as winter in frigid regions), valves in their water systems, braking systems, and other pipelines are prone to freezing, leading to problems such as jamming, malfunction, or even cracking and damage, severely impacting the safety and reliability of train operation. Therefore, anti-freezing design of high-speed train valves is a key technology to ensure stable operation under low-temperature conditions.

[0003] Existing antifreeze valves for high-speed trains mostly employ passive insulation or fixed heating methods, such as wrapping with insulation layers or installing constant heat tracing devices. While these methods can alleviate the icing problem to some extent, they still have significant drawbacks. Patent application number 202511997572.6 discloses a micro-vacuum antifreeze valve for the water supply and drainage system of high-speed trains. This valve allows for rapid connection and efficient discharge with the station's ground-based collection facilities. After discharge, it ensures the valve body remains empty, preventing sewage from accumulating and filling during operation. Simultaneously, the micro-vacuum environment maintained inside effectively isolates air and moisture, thus preventing blockages caused by frozen sewage.

[0004] However, in many cases, ensuring that there is no sewage stagnation in the pipeline does not meet the actual application conditions. Moreover, there will inevitably be residual water in the pipeline and valve body, and it is difficult to maintain a vacuum environment. Therefore, it is not scientific to achieve antifreeze by ensuring that the pipeline and valve are in a water-free state. The operating area of ​​the train is relatively wide, and sewage flowing out in the cold Northeast region can still freeze easily. It is impossible to fundamentally prevent freezing based on multiple dimensions such as the ambient temperature, valve body temperature and medium temperature.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0006] To address the shortcomings of the prior art, this invention provides an antifreeze valve device for high-speed trains, which can achieve uniform heating through hot water circulation, ensuring that the valve body does not freeze or become stuck; it has a good sealing effect and can temporarily contain leaked water to prevent water from overflowing.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: An antifreeze valve device for high-speed trains includes a ball valve with pipes installed at both ends. The outer side of the ball valve is provided with two upper and lower locking covers that are interlocked vertically. The upper and lower snap-fit ​​covers have the same structure. Both the upper and lower snap-fit ​​covers include an arched portion that protrudes outward from the middle. The upper and lower snap-fit ​​covers also include contracted portions that extend to both ends of the arched portion. The upper and lower snap-fit ​​covers seal the ball valve in the closed cavity. Liquid flow channels are provided in the side walls of the upper and lower snap-fit ​​covers. A controller is fixed on the outside of the upper snap-fit ​​cover. The controller integrates a control system and a heater and a water pump connected in series. The water pump sends the water in the closed cavity through the liquid flow channels into the heater, heats it, and then discharges it into the closed cavity.

[0008] Furthermore, side fixing flanges are provided on both sides of the arched portion of the upper and lower snap-fit ​​covers, and end fixing flanges are provided on both sides of the contracted portion of the upper and lower snap-fit ​​covers. The two opposite side fixing flanges and the two opposite end fixing flanges are connected by bolts.

[0009] Furthermore, the liquid flow channel includes a first flow channel and a second flow channel that communicate with each other within the side wall of the lower snap-fit ​​cover, and the inner end of the first flow channel is provided with a water inlet on the inner wall of the lower snap-fit ​​cover. The liquid flow channel also includes a third flow channel inside the side wall of the upper snap-fit ​​cover, which is connected to the second flow channel; the outer end of the third flow channel is provided with a water inlet on the outer wall of the upper snap-fit ​​cover, and a water outlet is provided on one side of the water inlet, which penetrates the side wall of the upper snap-fit ​​cover.

[0010] Furthermore, the first flow channel is arranged axially, the second flow channel is arranged in an arc shape along its arched portion, and the outer end of the second flow channel extends to the first interface of the lower snap-fit ​​cover mating surface.

[0011] Furthermore, the third flow channel is arranged in an arc shape along its arched portion, with the lower end of the third flow channel extending to the second interface of the upper snap-fit ​​cover mating surface, and the upper end of the third flow channel extending to the outer side of the arched portion of the upper snap-fit ​​cover.

[0012] Furthermore, a third sealing groove is provided in the first pair of interfaces, and a sealing ring is installed in the third sealing groove.

[0013] Furthermore, a first sealing groove is provided on both sides of the mating surface of the lower snap-fit ​​cover, and a sealing strip is embedded in the first sealing groove; a second sealing groove is provided on the inner side of the contraction part of the upper snap-fit ​​cover and the lower snap-fit ​​cover, and a sealing ring is installed in the second sealing groove.

[0014] Furthermore, a temperature sensor is inserted into the side wall of the lower latching cover. The detection head of the temperature sensor is close to the inner wall of the arched part of the lower latching cover, and the temperature sensor is electrically connected to the control system in the controller through a signal line.

[0015] Furthermore, a one-way water injection valve is installed on the arched part of the upper snap-fit ​​cover to replenish circulating water to the closed cavity.

[0016] Furthermore, a movable cylindrical lifting block is provided in the arched part of the upper snap-fit ​​cover. The upper and lower ends of the lifting block are respectively provided with baffles. An inner flow channel is provided inside the lifting block. The upper end of the inner flow channel extends to the top of the lifting block, and the lower end of the inner flow channel extends to the side wall of the lower part of the lifting block.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: The first and second flow channels inside the lower snap-fit ​​cover are connected to the third flow channel inside the upper snap-fit ​​cover, forming a complete circulating liquid flow channel. When the detected temperature is lower than the set antifreeze threshold, the controller automatically starts the water pump and heater. The water pump draws water from the liquid flow channel through the suction port, sends it to the heater for heating, and then sends it back to the cavity through the outlet, realizing uniform heating of hot water circulation and ensuring that the valve body does not freeze or get stuck.

[0018] The sealed cavity can temporarily contain leaked water, preventing water from overflowing, freezing, short-circuiting, or contaminating the carriages, thus improving the safety of high-speed train operation.

[0019] The upper and lower snap-fit ​​caps interlock and enclose the ball valve, forming a completely sealed cavity through the seals within the first, second, and third sealing grooves, isolating the valve body from the external low-temperature environment. This multi-layered sealing structure creates independent sealed cavities, effectively isolating the valve body from external low temperatures, reducing heat loss, and preventing moisture and dust from entering the valve body. The snap-fit ​​cap structure allows for quick installation on existing ball valves without requiring modifications to the valve body or piping; it is suitable for freeze protection applications in various valve systems, such as those used in high-speed train water systems and braking systems.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the outer structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is an internal view of the lid when it is closed. Figure 5 This is an internal view of the top-hook cover.

[0022] In the diagram, 1-pipe, 2-lower snap-fit ​​cover, 3-upper snap-fit ​​cover, 4-side fixed flange, 5-end fixed flange, 6-bolt connection, 7-ball valve, 8-adjusting seat, 9-first sealing groove, 10-second sealing groove, 11-first flow channel, 12-second flow channel, 13-inlet, 14-first interface, 15-third sealing groove, 16-third flow channel, 17-second interface, 18-suction port, 19-outlet, 20-avoidance port, 21-one-way water injection valve, 22-lifting block, 23-baffle, 24-inner flow channel, 25-controller, 26-temperature sensor. Detailed Implementation

[0023] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0024] like Figure 1-5 As shown, the present invention provides an antifreeze valve device for high-speed trains, including a ball valve 7, with pipes 1 installed at both ends of the ball valve 7. The outer side of the ball valve 7 is provided with two upper locking covers 3 and lower locking covers 2 that are interlocked vertically. An adjusting seat 8 extends outward from the ball valve 7, and a rotary switch is rotatably installed on the adjusting seat 8. The adjusting seat 8 extends beyond the clearance opening 20 of the upper locking cover 3, and a sealing ring is provided at the clearance opening 20.

[0025] The upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 have the same structure. Both the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 include an arched part that protrudes outward from the middle. The upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 also include a shrinking part that extends to both ends of the arched part. The upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 seal the ball valve 7 in the closed cavity.

[0026] Liquid flow channels are provided inside the side walls of the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2. A controller 25 is fixed on the outside of the upper snap-fit ​​cover 3. The controller 25 integrates a control system and a heater and a water pump connected in series. The water pump sends water from the sealed cavity through the liquid flow channels into the heater, heats it, and then discharges it back into the sealed cavity. The heater heats the water flow before discharging it into the sealed cavity, which in turn heats the ball valve 7, thus preventing it from freezing.

[0027] Side fixing flanges 4 are provided on both sides of the arched portion of the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2. End fixing flanges 5 are provided on both sides of the contracted portion of the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2. The two opposite side fixing flanges 4 and the two opposite end fixing flanges 5 are connected by bolts 6.

[0028] The liquid flow channel includes a first flow channel 11 and a second flow channel 12 that communicate with each other within the side wall of the lower snap-fit ​​cover 2. The inner end of the first flow channel 11 has a water inlet 13 on the inner wall of the lower snap-fit ​​cover 2. The liquid flow channel also includes a third flow channel 16 within the side wall of the upper snap-fit ​​cover 3, which is connected to the second flow channel 12. The outer end of the third flow channel 16 has a water suction port 18 on the outer wall of the upper snap-fit ​​cover 3, and a water outlet 19 that communicates with the side wall of the upper snap-fit ​​cover 3 is also provided on one side of the water suction port 18. The water pump draws water from the water suction port 18, and after being heated by the heater, it is discharged into the closed cavity from the water outlet 19.

[0029] The first flow channel 11 is arranged axially, and the second flow channel 12 is arranged in an arc shape along its arched portion. The outer end of the second flow channel 12 extends to the first interface 14 of the mating surface of the lower snap-fit ​​cover 2.

[0030] The third flow channel 16 is arranged in an arc shape along its arched portion. The lower end of the third flow channel 16 extends to the second interface 17 of the mating surface of the upper snap-fit ​​cover 3, and the upper end of the third flow channel 16 extends to the outer side of the arched portion of the upper snap-fit ​​cover 3.

[0031] A third sealing groove 15 is provided in the first pair of interfaces 14, and a sealing ring is installed in the third sealing groove 15.

[0032] Both sides of the mating surface of the lower snap-fit ​​cover 2 are provided with a first sealing groove 9, and a sealing strip is embedded in the first sealing groove 9; a second sealing groove 10 is provided on the inner side of the contraction part of the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2, and a sealing ring is installed in the second sealing groove 10. Thus, the closed cavity is well sealed.

[0033] A temperature sensor 26 is inserted into the side wall of the lower latching cover 2. The detection head of the temperature sensor 26 is close to the inner wall of the arched part of the lower latching cover 2, and the temperature sensor 26 is electrically connected to the control system in the controller through a signal line. When the temperature sensor 26 detects that the water temperature has reached the set temperature, the control system controls the water pump and heater to work. The water pump draws liquid through the liquid flow channel, and the heater heats the water flow before discharging it into the closed cavity, circulating the flow so that the ball valve 7 does not lose temperature, thus effectively preventing freezing in extremely cold regions.

[0034] A one-way water injection valve 21 is installed on the arched part of the upper snap-fit ​​cover 3, and circulating water is added to the closed cavity through the one-way water injection valve 21.

[0035] A movable cylindrical lifting block 22 is also provided in the arched part of the upper snap-fit ​​cover 3. The upper and lower ends of the lifting block 22 are respectively provided with baffles 23. An inner flow channel 24 is provided inside the lifting block 22, with its upper end extending to the top of the lifting block 22 and its lower end extending to the lower side wall of the lifting block 22. The material of the lifting block 22 is less dense than water. When the closed cavity is not full of water, circulating water is added to the closed cavity through the one-way water injection valve 21. Air passes through the inner flow channel 24 to prevent positive pressure from forming inside when water is added. After the water is full, the lifting block 22 floats up, and the liquid inlet at the lower end of the inner flow channel 24 rises to within the side wall of the upper snap-fit ​​cover 3, preventing both air and water from overflowing. Simultaneously, when the ball valve 7 or pipe 1 leaks, the closed cavity formed by the upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 can temporarily seal the water, preventing large-scale overflow.

[0036] The specific working principle and beneficial effects of this invention are as follows: The upper snap-fit ​​cover 3 and the lower snap-fit ​​cover 2 fasten and enclose the ball valve 7, forming a completely sealed cavity through the seals within the first sealing groove 9, the second sealing groove 10, and the third sealing groove 15, isolating the valve body from the external low-temperature environment. This multi-layered sealing structure creates an independent sealed cavity, effectively isolating the valve from external low temperatures, reducing heat loss, and preventing moisture and dust from entering the valve body. The upper and lower snap-fit ​​cover structure can be quickly fitted onto existing ball valves without modifying the valve body or piping; it is suitable for antifreeze applications in various valves such as those used in high-speed train water systems and braking systems.

[0037] Temperature sensor 26 continuously collects the temperature of the medium inside the closed cavity and transmits the signal to the control system of controller 25. The first flow channel 11 and the second flow channel 12 inside the lower latching cover 2 are connected to the third flow channel 16 inside the upper latching cover 3, forming a complete circulating liquid flow channel. When the detected temperature is lower than the set antifreeze threshold, the controller automatically starts the water pump and heater. The water pump draws water from the cavity through the liquid flow channel via the suction port 18, sends it to the heater for heating, and then sends it back to the cavity through the outlet 19, realizing uniform heating of hot water circulation and ensuring that the valve body does not freeze or get stuck. Closed-loop constant temperature circulation heating can stably maintain the valve body temperature in extremely low temperature environments, completely solving the problems of valve freezing, jamming, and freezing cracking, and meeting the long-term operation requirements of high-speed trains in cold regions. Heating and circulation are automatically started and stopped according to the real-time temperature, without the need for continuous full-load operation. Compared with traditional constant heat tracing devices, it has lower energy consumption and is compatible with on-board power supply conditions.

[0038] Circulating water is added to the closed cavity through the one-way water injection valve 21; the lifting block 22 floats up with the water level, the inner flow channel 24 automatically completes the venting, and automatically seals when the water is full. If the ball valve 7 or the pipeline 1 leaks, the closed cavity can temporarily contain the leaked water to prevent water from overflowing, freezing, short-circuiting or contaminating the carriage, thus improving the safety of the train operation.

[0039] The above description provides examples of the preferred embodiments of the present invention. Parts not detailed herein are common knowledge to those skilled in the art. The scope of protection of the present invention is determined by the claims. Any equivalent modifications based on the technical teachings of the present invention are also within the scope of protection of the present invention.

Claims

1. A freeze-proof valve device for high-speed trains, characterized in that: Includes a ball valve (7), with pipes (1) installed at both ends of the ball valve (7), and two upper snap-fit ​​covers (3) and lower snap-fit ​​covers (2) that are interlocked on the outside of the ball valve (7); The upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2) have the same structure. Both the upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2) include an arched part that protrudes outward from the middle. The upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2) also include a shrinking part that extends to both ends of the arched part. The upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2) seal the ball valve (7) in the closed cavity. Liquid flow channels are provided in the side walls of the upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2). A controller (25) is fixed on the outside of the upper snap-fit ​​cover (3). The controller (25) integrates a control system and a heater and a water pump connected in series. The water pump sends the water in the closed cavity into the heater through the liquid flow channel, heats it, and then discharges it into the closed cavity.

2. The anti-freezing valve device for a motor car according to claim 1, characterized in that: Side fixing flanges (4) are provided on both sides of the arched portion of the upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2), and end fixing flanges (5) are provided on both sides of the contracted portion of the upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2). The two opposite side fixing flanges (4) and the two opposite end fixing flanges (5) are connected by bolts (6).

3. The anti-freezing valve device for a motor car according to claim 1, wherein: The liquid flow channel includes a first flow channel (11) and a second flow channel (12) that are interconnected within the side wall of the lower snap-fit ​​cover (2). The inner end of the first flow channel (11) is provided with an inlet (13) on the inner wall of the lower snap-fit ​​cover (2). The liquid flow channel also includes a third flow channel (16) inside the side wall of the upper snap-fit ​​cover (3), which is connected to the second flow channel (12); the outer end of the third flow channel (16) is provided with a water inlet (18) on the outer wall of the upper snap-fit ​​cover (3), and a water outlet (19) penetrating the side wall of the upper snap-fit ​​cover (3) is also provided on one side of the water inlet (18).

4. The anti-freezing valve device for a motor car according to claim 3, wherein: The first flow channel (11) is arranged axially, and the second flow channel (12) is arranged in an arc shape along its arched portion. The outer end of the second flow channel (12) extends to the first interface (14) of the mating surface of the lower snap-fit ​​cover (2).

5. The anti-freezing valve device for a motor car according to claim 3, wherein: The third flow channel (16) is arranged in an arc shape along its arched portion. The lower end of the third flow channel (16) extends to the second interface (17) of the mating surface of the upper snap-fit ​​cover (3), and the upper end of the third flow channel (16) extends to the outside of the arched portion of the upper snap-fit ​​cover (3).

6. The anti-freezing valve device for a motor car according to claim 1, wherein: A third sealing groove (15) is provided in the first pair of interfaces (14), and a sealing ring is installed in the third sealing groove (15).

7. The antifreeze valve device for high-speed trains as described in claim 1, characterized in that: A first sealing groove (9) is provided on both sides of the mating surface of the lower snap-fit ​​cover (2), and a sealing strip is embedded in the first sealing groove (9); a second sealing groove (10) is provided on the inner side of the shrinkage part of the upper snap-fit ​​cover (3) and the lower snap-fit ​​cover (2), and a sealing ring is installed in the second sealing groove (10).

8. The antifreeze valve device for high-speed trains as described in claim 1, characterized in that: A temperature sensor (26) is inserted into the side wall of the lower snap-fit ​​cover (2). The detection head of the temperature sensor (26) is close to the inner wall of the arched part of the lower snap-fit ​​cover (2), and the temperature sensor (26) is electrically connected to the control system in the controller through a signal line.

9. The antifreeze valve device for high-speed trains as described in claim 1, characterized in that: A one-way water injection valve (21) is installed on the arched part of the upper snap-fit ​​cover (3) to replenish circulating water to the closed cavity.

10. The antifreeze valve device for high-speed trains as described in claim 1, characterized in that: A movable cylindrical lifting block (22) is also provided in the arched part of the upper snap-fit ​​cover (3). The upper end and lower end of the lifting block (22) are respectively provided with baffles (23). An inner flow channel (24) is provided in the lifting block (22). The upper end of the inner flow channel (24) extends to the top of the lifting block (22), and the lower end of the inner flow channel (24) extends to the side wall of the lower part of the lifting block (22).

Images