Hazardous chemical vehicle emergency cut-off valve

Abstract

The utility model provides a dangerous chemical vehicle emergency cut-off valve which comprises a valve body and a monitoring terminal, and the valve body comprises a first valve chamber, a second valve chamber, a valve element, a valve rod, a valve deck and a valve seat. The valve element is of a near-sphere structure and connected with one end of the valve rod and the valve seat, the second valve chamber is close to the valve deck, the valve element comprises a ball valve connected with the valve seat and a valve block, the valve block penetrates through the top of the ball valve to be connected with a controller at the top of the second valve chamber, and the valve block is matched with a channel in the middle of the ball valve. A monitoring probe comprising a pressure sensor is arranged outside the second valve chamber and penetrates through the wall thickness of the second valve chamber; a flange plate connected with the valve body comprises a sealing groove and a groove formed in the outer side of the sealing groove, and a humidity sensor in signal connection with the monitoring terminal is arranged in the groove. The vehicle emergency cut-off valve is simple in structure, leakage early warning and automatic sudden stop of gas and liquid hazardous chemical substances are compatible, and economical efficiency, compatibility and practicability of the vehicle emergency cut-off valve are improved.

Description

Technical Field

[0001] This application relates to the field of hazardous chemical transportation technology, specifically to an emergency shut-off valve for hazardous chemical vehicles. Background Technology

[0002] Hazardous chemicals are a general term for toxic, flammable, explosive, harmful, and radioactive chemical products. In the chemical industry, these hazardous chemicals are often transported by tank trucks. Different types of hazardous chemicals have different storage tank structures. Valves are crucial components for loading and unloading hazardous chemicals on tank trucks. Different valves are used for hazardous chemicals in different states; for example, the valves for gaseous and liquid hazardous chemical storage tanks have significant structural differences. To ensure transportation safety and to safeguard the gas or liquid inside the hazardous chemical tank in the event of an accident, emergency shut-off valves are required. These valves are used to urgently cut off the connection between the tank and the outside world in dangerous situations, preventing the accident from escalating. However, most existing emergency shut-off valves require manual operation to shut off, and users cannot know whether the valve is leaking or receive warnings when a leak is possible. To address this issue, Chinese patent CN118328160A discloses an emergency shut-off valve for gas turbines with external leakage monitoring and warning functions, which includes a monitoring chamber. By obtaining information on whether there is fuel in the monitoring chamber, the valve body can be confirmed to have leaked or may leak, thus achieving the monitoring of hazardous gas leaks. However, this emergency shut-off valve has a complex structure, strict sealing requirements, and is mainly designed for gaseous hazardous chemical transport tankers, making its economy, compatibility, and practicality somewhat lacking. Summary of the Invention

[0003] This utility model provides an emergency shut-off valve for hazardous chemical vehicles to solve the related technical problems in the prior art.

[0004] This utility model provides an emergency shut-off valve for hazardous chemical vehicles, including a valve body and a monitoring terminal. The valve body has flanges at both its inlet and outlet. The valve body includes a first valve chamber, a second valve chamber, a valve core, a valve stem, a valve cover, and a valve seat. The valve core has a near-spherical structure and is connected to one end of the valve stem and the valve seat. The second valve chamber is located near the valve cover. The valve core includes a ball valve and a valve block connected to the valve seat. The valve block passes through the top of the ball valve and is connected to a controller at the top of the second valve chamber. The valve block is adapted to a channel in the middle of the ball valve. A monitoring probe including a pressure sensor is provided outside the second valve chamber, and the monitoring probe passes through the wall thickness of the second valve chamber.

[0005] The flange connection surface of the valve body's inlet includes a sealing groove and a recess located outside the sealing groove. A humidity sensor connected to the monitoring terminal signal is provided in the recess. The valve cover includes a valve lock that engages with a limiting groove on the valve stem. The control structure of the valve lock is connected to the monitoring terminal signal.

[0006] Optionally, the controller includes a magnetic block and a relay, the relay being signal-connected to the monitoring terminal, and the telescopic rod inside the relay being electromagnetically connected to the magnetic block disposed on the upper end of the valve block.

[0007] Optionally, the ball valve is an O-type ball valve with a valve block groove.

[0008] Optionally, the inlet of the valve body is connected to the flange of the material outlet of the tank truck; the monitoring terminal is integrated into the vehicle's control system, including an emergency stop button and a reset button located in the driver's seat.

[0009] Optionally, the valve stem, the valve cover, and the connection point of the valve stem all include a keyway, which is used to install an anti-rotation key.

[0010] Optionally, the valve lock includes a cylinder, a guide rail, a push rod, and a spring lock block. One end of the push rod is connected to the cylinder, and the other end is connected to the spring lock block. The guide rail is connected to the bottom surface of the push rod and is mounted on the valve cover.

[0011] Optionally, it may also include a disc-shaped valve plug, which is detachably connected to the valve stem.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides an emergency shut-off valve for hazardous chemical vehicles, featuring independent first and second valve chambers. A valve block, capable of passing through the ball valve in the first valve chamber, is installed in the second valve chamber. When an emergency stop is required, this valve block descends, closing the ball valve's passage and preventing the outflow of hazardous substances from the tanker truck, thus achieving automatic emergency stop. Furthermore, this emergency shut-off valve is suitable for tanker trucks transporting hazardous liquids and gases. When a monitoring probe inserted into the second valve chamber detects a hazardous gas leak reaching a preset rate or threshold, it enters an emergency shut-off mode. Similarly, when hazardous liquid permeates to the outside of the sealing ring on the flange, it enters an emergency shut-off mode, preventing the leakage of hazardous substances from the tanker truck and protecting the vehicle, its surrounding environment, and personnel. In other words, this utility model has a simple structure, achieving both gas and liquid hazardous chemical leak warning and automatic emergency stop, improving the economy, compatibility, and practicality of vehicle emergency shut-off valves. Attached Figure Description

[0014] Figure 1This is a cross-sectional front view of an emergency shut-off valve for hazardous chemical vehicles provided in an embodiment of this application;

[0015] Figure 2 express Figure 1 A partially enlarged schematic diagram of the flange connection surface at the inlet of the valve body;

[0016] Figure 3 The diagram shows a front sectional view and a top view of the ball valve in this embodiment.

[0017] Figure label:

[0018] 1: Valve body; 12: Second valve chamber; 13: Valve stem; 14: Valve cover; 15: Valve seat; 2: Ball valve; 3: Valve block; 4: Monitoring probe; 5: Groove; 6: Valve lock; 7: Valve bolt. Detailed Implementation

[0019] The technical solutions in the embodiments of the application will now be clearly and completely described with reference to the accompanying drawings. Furthermore, the phrases "in one embodiment" or "in one embodiment" appearing throughout this specification do not necessarily refer to the same embodiment. Moreover, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0020] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0021] Hazardous chemicals are a general term for toxic, flammable, explosive, harmful, and radioactive chemical products. In the chemical industry, these hazardous chemicals are often transported by tank trucks. Different types of hazardous chemicals have different storage tank structures. Valves are crucial components for loading and unloading hazardous chemicals on tank trucks. Different valves are used for hazardous chemicals in different states; for example, the valves for gaseous and liquid hazardous chemical storage tanks have significant structural differences. To ensure transportation safety and the safety of the gas or liquid inside the hazardous chemical tank in the event of an accident, emergency shut-off valves are required. These valves are used to urgently cut off the connection between the tank and the outside world in dangerous situations, preventing the accident from escalating. However, most existing emergency shut-off valves require manual operation, and users cannot know if the valve is leaking or receive warnings when a potential leak occurs. Existing emergency shut-off valves have complex structures, strict sealing requirements, and are mainly designed for tank trucks transporting gaseous hazardous chemicals, resulting in insufficient economy, compatibility, and practicality. Therefore, this utility model provides an emergency shut-off valve for hazardous chemical vehicles to improve its compatibility with various operating environments, as well as its economy and practicality.

[0022] like Figures 1 to 3 As shown, this utility model provides an emergency shut-off valve for hazardous chemical vehicles, including a valve body 1 and a monitoring terminal. Both the inlet and outlet of the valve body 1 are provided with flanges. The valve body 1 includes: a first valve chamber, a second valve chamber 12, a valve core, a valve stem 13, a valve cover 14, and a valve seat 15. The valve core has a near-spherical structure and is connected to one end of the valve stem 13 and the valve seat 15 respectively. The second valve chamber 12 is close to the valve cover 14. The valve core includes a ball valve 2 connected to the valve seat 15 and a valve block 3. The valve block 3 passes through the top of the ball valve 2 and is connected to a controller at the top of the second valve chamber 12. The valve block 3 is adapted to the channel in the middle of the ball valve 2. A monitoring probe 4, including a pressure sensor, is provided outside the second valve chamber 12, and the monitoring probe 4 passes through the wall thickness of the second valve chamber 12.

[0023] Among them, such as Figure 2 As shown, the flange connection surface of the valve body 1 includes a sealing groove and a groove 5 disposed outside the sealing groove. A humidity sensor connected to the monitoring terminal signal is disposed in the groove 5. The valve cover 14 includes a valve lock 6 that engages with the limiting groove on the valve stem 13. The control structure of the valve lock 6 is connected to the monitoring terminal signal.

[0024] The emergency shut-off valve for hazardous chemical vehicles provided by this utility model is equipped with independent first and second valve chambers 12. A valve block 3, which can pass through the ball valve 2 in the first valve chamber, is installed in the second valve chamber 12. When an emergency stop is required, the valve block 3 falls and closes the passage of the ball valve 2. Figure 1The area indicated by the two parallel dotted lines inside the ball valve 2 prevents the outflow of hazardous substances from the tanker truck, thereby achieving automatic emergency stop. Furthermore, the emergency shut-off valve provided by this invention is suitable for tanker trucks transporting hazardous liquids and gases. When the monitoring probe 4 inserted in the second valve chamber 12 detects that the hazardous gas leakage reaches a preset speed or preset threshold, it enters the emergency shut-off mode. Similarly, as... Figure 2 As shown, if a dangerous liquid seeps into the outside of the sealing ring mounting groove on the flange, the emergency shut-off mode is activated to prevent the dangerous substances inside the tanker from leaking out, thus protecting the vehicle, the surrounding environment, and the safety of personnel.

[0025] Specifically, the valve core in this invention differs from the structure of a typical ball valve 2. A through hole for a valve block 3 is added to the top of the ball valve 2, allowing the valve block 3 to fall into the ball valve 2 during emergency stops to block the output of hazardous materials from the tanker. The structures of the first and second valve chambers 12 must meet the requirements of an upper and lower structure, ensuring that gaseous or liquid hazardous materials passing through the valve core do not reach the second valve chamber 12. Hazardous gases or liquids can only enter the second valve chamber 12 in the event of a leak. Furthermore, the valve cover 14 is sealed to the second valve chamber 12; the inlet of the valve body 1 is used for a flange sealing connection to the tanker's outlet pipe, and the flange on the outlet of the valve body 1 is used for docking with other connection structures. This embodiment does not impose specific limitations on these aspects.

[0026] In addition, the aforementioned valve lock 6 is installed on the valve cover 14 to limit the position of the valve stem 13, preventing the valve stem 13 from being rotated improperly or from shifting during transportation. Specifically, the valve lock 6 includes a cylinder, a guide rail, a push rod, and a spring locking block (the control structure of the aforementioned valve lock 6 consists of a guide rail, a cylinder push rod, and a spring locking block). One end of the push rod is connected to the cylinder, and the other end is connected to the spring locking block. The guide rail is connected to the bottom surface of the push rod and is installed on the valve cover 14. The valve lock 6 can be set to a normally closed state, that is, the spring locking block naturally pushes the push rod outward, and the push rod is engaged with the limiting groove on the valve stem 13. When it is necessary to adjust the closure of the shut-off valve, the cylinder is first controlled to pull the push rod back to the unlocked position, so that the push rod leaves the limiting groove of the valve stem 13. The number of limiting grooves on the valve stem 13 can be adjusted according to the actual position and angle of rotation that the valve stem 13 needs to control. This embodiment does not impose specific limitations on this.

[0027] In addition, the aforementioned valve stem 13, valve cover 14, and the connection point with the valve stem 13 all include keyways. These keyways are used to install anti-rotation keys, which connect the valve stem 13 and the valve cover 14. The length of the keyway is related to the adjustable length of the valve stem 13, and this embodiment does not impose specific limitations on this.

[0028] It should be noted that the aforementioned controller includes a magnetic block and a relay. The relay is signal-connected to the monitoring terminal, and the telescopic rod inside the relay is electromagnetically connected to the magnetic block located on the upper end of the valve block 3. The ball valve 2 is an O-type ball valve 2 containing a groove for the valve block 3, the groove of which is as follows: Figure 3 As shown in the lower center top view. When the humidity sensor or monitoring probe 4 detects the humidity and gas pressure values, and these values ​​meet the preset conditions for entering the emergency stop mode, the relay is activated, pushing the valve block 3 into the ball valve 2, blocking the passage of the ball valve 2 (this passage is... Figure 1 The area between the two horizontal parallel dotted lines inside the ball valve 2 blocks the flow of hazardous gases or liquids. This embodiment does not impose detailed limitations on specific parameters such as humidity and pressure values; these need to be adjusted adaptively according to actual usage. Furthermore, the cross-sectional shape of the channel in the middle of the O-type ball valve 2 is the tangent of a ball with two symmetrical planes removed, to reduce the eddy current effect generated within the channel.

[0029] Additionally, the inlet of the valve body 1 is connected to the flange of the tanker truck's material outlet; the monitoring terminal is integrated into the vehicle's control system, including an emergency stop button and a reset button located in the driver's seat. It also includes a disc-shaped valve plug 7, which is detachably connected to the valve stem 13.

[0030] In this embodiment, the monitoring terminal is integrated into the tanker truck's control system to display whether there is a leak warning. When a warning occurs, the transmission is immediately cut off by controlling valve block 3 in the valve core via the emergency stop button. Once the leak risk is eliminated, the transmission is resumed by controlling valve block 3 in the valve core via the reset button. Additionally, the aforementioned circular valve plug 7 is a structure connected to the upper end of the valve stem 13 to facilitate adjustment of the valve stem 13's rotation, similar to a steering wheel or a ship's rudder; this embodiment does not impose specific limitations on this. Of course, this monitoring terminal can also be installed in the driver's seat of the tanker truck as an independent terminal device displaying real-time monitoring data for the co-driver.

[0031] Finally, this utility model provides an emergency shut-off valve for hazardous chemical vehicles, including a valve body 1 and a monitoring terminal. The valve body 1 includes: a first valve chamber, a second valve chamber 12, a valve core, a valve stem 13, a valve cover 14, and a valve seat 15. The valve core has a near-spherical structure and is connected to one end of the valve stem 13 and the valve seat 15 respectively. The second valve chamber 12 is close to the valve cover 14. The valve core includes a ball valve 2 connected to the valve seat 15 and a valve block 3. The valve block 3 passes through the top of the ball valve 2 and is connected to the controller at the top of the second valve chamber 12. The valve block 3 is adapted to the channel in the middle of the ball valve 2. A monitoring probe 4 including a pressure sensor is provided outside the second valve chamber 12. The monitoring probe 4 passes through the wall thickness of the second valve chamber 12. The flange connection surface of the inlet of the valve body 1 includes a sealing groove and a groove 5 provided outside the sealing groove. A humidity sensor connected to the monitoring terminal is provided in the groove 5. The valve cover 14 includes a valve lock 6 that engages with the limiting groove on the valve stem 13. The control structure of the valve lock 6 is connected to the monitoring terminal. This utility model has a simple structure and realizes both gas and liquid hazardous chemical leakage early warning and automatic emergency stop, improving the economy, compatibility and practicality of vehicle emergency shut-off valves.

[0032] It should be noted that all the above embodiments belong to the same inventive concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not exhaustive, please refer to the description in other embodiments. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to mutually.

[0033] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An emergency shut-off valve for hazardous chemical vehicles, characterized in that, The system includes a valve body (1) and a monitoring terminal. The valve body (1) includes a first valve chamber, a second valve chamber (12), a valve core, a valve stem (13), a valve cover (14), and a valve seat (15). The valve core has a near-spherical structure and is connected to one end of the valve stem (13) and the valve seat (15) respectively. The second valve chamber (12) is close to the valve cover (14). The valve core includes a ball valve (2) and a valve block (3) connected to the valve seat (15). The valve block (3) passes through the top of the ball valve (2) and is connected to the controller at the top of the second valve chamber (12). The valve block (3) is adapted to the channel in the middle of the ball valve (2). A monitoring probe (4) including a pressure sensor is provided outside the second valve chamber (12). The monitoring probe (4) passes through the wall thickness of the second valve chamber (12). The flange connection surface of the valve body (1) includes a sealing groove and a groove (5) provided on the outside of the sealing groove. A humidity sensor connected to the monitoring terminal signal is provided in the groove (5). The valve cover (14) includes a valve lock (6). The valve lock (6) is engaged with the limiting groove on the valve stem (13). The control structure of the valve lock (6) is connected to the monitoring terminal signal.

2. The emergency shut-off valve for hazardous chemical vehicles according to claim 1, characterized in that, The controller includes a magnetic block and a relay. The relay is signal-connected to the monitoring terminal. The telescopic rod inside the relay is electromagnetically connected to the magnetic block located on the upper end of the valve block (3).

3. The emergency shut-off valve for hazardous chemical vehicles according to claim 2, characterized in that, The ball valve (2) is an O-type ball valve containing a valve block groove.

4. The emergency shut-off valve for hazardous chemical vehicles according to claim 3, characterized in that, The inlet of the valve body (1) is connected to the flange of the material outlet of the tank truck; the monitoring terminal is integrated into the vehicle's control system and includes an emergency stop button and a reset button located in the driver's seat.

5. The emergency shut-off valve for hazardous chemical vehicles according to claim 1, characterized in that, The valve stem (13), the valve cover (14), and the connection between the valve stem (13) all include keyways, which are used to install anti-rotation keys.

6. The emergency shut-off valve for hazardous chemical vehicles according to claim 2, characterized in that, The valve lock (6) includes a cylinder, a guide rail, a push rod, and a spring lock block. One end of the push rod is connected to the cylinder, and the other end is connected to the spring lock block. The guide rail is connected to the bottom surface of the push rod and is mounted on the valve cover (14).

7. The emergency shut-off valve for hazardous chemical vehicles according to claim 4, characterized in that, It also includes a disc-shaped valve plug (7), which is detachably connected to the valve stem (13).

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