A high-temperature protection shut-off valve

Abstract

This application discloses a high-temperature protection shut-off valve, belonging to the technical field of shut-off valves for gas pipelines. It includes a valve body and a connector, both of which are tubular structures. The valve body and connector are joined together. A channel opening is provided within the valve body. A sealing plug is installed within the connector via an elastic element. One side of the sealing plug is connected to the elastic element, and the other side is connected to a stop. The stop is located between the sealing plug and the channel opening. The elastic element applies a force to the sealing plug, causing it to move towards the channel opening. The stop abuts against the channel opening. The stop is a temperature-sensing element that melts at a predetermined temperature. This application achieves minimal impact on the flow path of the medium and can promptly shut off the gas pipeline when a specified temperature is reached.

Description

Technical Field

[0001] This application relates to the field of shut-off valve technology for gas pipelines, and in particular to a high-temperature protection shut-off valve. Background Technology

[0002] Natural gas is a commonly used energy source. Its combustibility allows it to release heat for human use, and therefore, high safety requirements exist for its use. Gas shut-off valves are safety devices in gas pipeline engineering, applied in the gas transmission and distribution field. They can cut off the pipeline in case of abnormalities in gas transmission, ensuring the safety of gas delivery and use.

[0003] To ensure safe use of gas, many safety valves are now used on gas pipelines. For example, a solenoid valve that is linked to a gas alarm is added before the meter. When a gas leak occurs, the alarm triggers the solenoid valve to shut off the gas. Another example is a self-closing valve, which cuts off the gas supply to the meter when the pipeline pressure exceeds, falls below, or experiences overcurrent leakage. Yet another example is an appliance valve with an overcurrent cut-off core, which cuts off the gas supply to the end of the pipeline in a timely manner when the hose or corrugated pipe connecting the appliance valve to the gas stove breaks, loosens, or falls off.

[0004] However, the aforementioned shut-off valves are only suitable for protecting against pipeline leaks under normal conditions. In the event of a fire, the sealing rubber components inside valves such as the meter inlet valve, gas meter, appliance inlet valve, and self-closing valve will fail, leading to gas leakage and combustion fire. Utility Model Content

[0005] The technical problem to be solved by this application is to provide a high-temperature protection shut-off valve that has little impact on the flow path of the medium and can promptly shut off the gas pipeline when the specified temperature is reached.

[0006] The technical solution adopted in this application is as follows: a high-temperature protection shut-off valve, including a valve body and a connector, both of which are tubular structural components. The valve body and the connector are connected together. A channel opening is provided in the valve body. A sealing plug is installed in the connector through an elastic element. One side of the sealing plug is connected to the elastic element, and the other side of the sealing plug is connected to a stop. The stop is located between the sealing plug and the channel opening. The elastic element applies a force to the sealing plug to move towards the channel opening, and the stop abuts against the channel opening. The stop is a temperature sensing element, and the stop melts at a predetermined temperature.

[0007] Compared with existing technologies, the advantages of this application are as follows: First, in its solid state, the stop element achieves mechanical limitation only by abutting against the channel opening, and its outline dimensions can be designed to be relatively small, resulting in a near-full-bore structure at the channel opening. Under normal operating conditions, the medium experiences almost no additional diameter reduction, and the pressure loss is comparable to that of a traditional straight-through pipe section, meeting the rated flow requirements of the stove. Second, after the shut-off action is completed, a hard-seal interface is formed between the sealing plug and the valve body channel opening. The entire shut-off valve does not contain rubber gaskets, sealing rings, or other polymer sealing components, fundamentally eliminating the risk of softening and carbonization failure of the sealing material caused by high temperatures during a fire. Third, the stop element itself is a fusible actuator, requiring no external power supply, signal, or manual intervention. When the ambient temperature reaches its melting point, it physically melts, and the elastic element instantaneously releases potential energy to push the sealing plug to close the channel opening. This triggering mechanism directly corresponds to the high temperature of a fire and has high reliability.

[0008] In some embodiments of this application, a circular ring is provided at the channel opening, and a connecting rod is provided on the outer periphery of the circular ring. The circular ring is connected to the inner wall of the channel opening through the connecting rod. The circular ring and the connecting rod structure form a central positioning support at the channel opening, maintaining a large flow area. To a certain extent, it also provides stable support for the stop, reducing the risk of stop displacement.

[0009] In some embodiments of this application, the annular component is coaxially arranged with the valve body, and the inner diameter of the annular component is smaller than the outer diameter of the stop component. This smaller inner diameter allows the stop component to stably abut against the end face of the annular component, achieving reliable mechanical limiting.

[0010] In some embodiments of this application, the stop is a spherical structure located on the central axis of the annular component. The spherical stop forms a spherical-ring contact with the annular component, resulting in high positioning accuracy and concentrated contact stress, and it detaches quickly after melting; the spherical shape is non-directional, simplifying assembly.

[0011] In some embodiments of this application, the melting temperature of the stop is 70℃~120℃. The stop melts and triggers a protection state upon reaching the specified temperature. Those skilled in the art can select fusible alloys with different melting points to set the trigger temperature according to their needs, without changing other parts, thus adapting to various installation environments. Specifically, the temperature can be set to 70℃, 90℃, 100℃, or 120℃.

[0012] In some embodiments of this application, the connector is provided with a mounting base, and a sealing plug is movably mounted on the mounting base. The sealing plug has a T-shaped cross-section. The T-shaped sealing plug, in conjunction with the mounting base, provides axial guidance, ensuring smooth movement. The shoulder of the T-shaped sealing plug can directly bear the spring force, resulting in a compact structure and reduced number of parts.

[0013] In some embodiments of this application, the sealing plug includes a plug head and a plug rod coaxially connected. The plug head has a disc-shaped structure, and its outer diameter is adapted to the channel opening. When the plug head fits against the channel opening, it blocks the channel opening. The disc-shaped plug head and the channel opening form a surface-to-surface hard seal, with a large contact area and reliable sealing. The matching of the plug head's outer diameter with the channel opening ensures zero leakage after closure.

[0014] In some embodiments of this application, the stopper rod is movably mounted at the mounting base, and the elastic element is a spring. The elastic element is sleeved on the stopper rod, with one end abutting against the mounting base and the other end abutting against the stopper head. The elastic element is in a compressed state. The spring sleeved on the stopper rod forms an internal guide, and the energy stored in the compressed spring acts directly on the stopper head, resulting in fast response, short stroke, and small space occupation.

[0015] In some embodiments of this application, the first end of the connector is inserted into the valve body, and the outer peripheral surface of the first end of the connector is in contact with the inner wall surface of the valve body, forming a sealed connection. This insertion allows for automatic alignment during assembly, reducing coaxiality errors; the contact surface also bears part of the axial force, improving connection strength.

[0016] In some embodiments of this application, the outer peripheral surface of the first end of the connector is bonded to the inner wall surface of the valve body with adhesive. Specifically, the adhesive used in this application is a high-temperature resistant adhesive, which can ensure that it will not fail in the event of a fire.

[0017] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0018] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of this application;

[0020] Figure 2 This is a side view of this application.

[0021] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Valve body; 2. Connector; 3. Channel port; 4. Elastic element; 5. Sealing plug; 5a. Plug head; 5b. Plug rod; 6. Stop; 7. Ring element; 8. Mounting base; 9. Connecting rod. Detailed Implementation

[0022] The present application will now be described in detail with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] A high-temperature protection shut-off valve, as described in Embodiment 1 Figure 1 As shown: The system includes a valve body 1 and a connector 2, both of which are tubular structures. The valve body 1 and connector 2 are joined together. A channel port 3 is provided inside the valve body 1. A sealing plug 5 is installed inside the connector 2 via an elastic element 4. One side of the sealing plug 5 is connected to the elastic element 4, and the other side is connected to a stop 6. The stop 6 is located between the sealing plug 5 and the channel port 3. The elastic element 4 applies a force to the sealing plug 5 to move towards the channel port 3, causing the stop 6 to abut against the channel port 3. In its solid state, the stop 6 achieves mechanical limitation only by abutting against the channel port 3, and its profile can be designed to be relatively small. In this case, the channel port 3 forms an approximately full-bore structure. Under normal operating conditions, the medium experiences almost no additional diameter reduction, and the pressure loss is comparable to that of a traditional straight-through pipe section, meeting the rated flow requirements of the stove. The stop 6 is a temperature-sensing element that melts at a predetermined temperature. After the shut-off action is completed, a hard seal interface is formed between the sealing plug 5 and the valve body 1 channel port 3. The entire shut-off valve does not contain rubber gaskets, O-rings, or other polymer seals, fundamentally eliminating the risk of softening and carbonization of the sealing material due to high temperatures during a fire. The stop element 6 itself is a fusible actuator, requiring no external power supply, signal, or manual intervention. When the ambient temperature reaches its melting point, it physically melts, and the elastic element 4 instantaneously releases potential energy to push the sealing plug 5 to close the channel port 3. This triggering mechanism directly corresponds to the high temperature of a fire and has high reliability.

[0025] Example 2, as Figures 1 to 2 As shown, a circular ring 7 is provided at the channel opening 3, and a connecting rod 9 is provided on the outer periphery of the circular ring 7. The circular ring 7 is connected to the inner wall of the channel opening 3 through the connecting rod 9. The structure of the circular ring 7 and the connecting rod 9 forms a central positioning support at the channel opening 3, maintaining a large flow area. To a certain extent, it also provides stable support for the stop 6, reducing the risk of the stop 6 shifting.

[0026] The annular component 7 is coaxially arranged with the valve body 1, and the inner diameter of the annular component 7 is smaller than the outer diameter of the stop component 6. The smaller inner diameter of the annular component 7 compared to the outer diameter of the stop component 6 allows the stop component 6 to stably abut against the end face of the annular component 7, achieving reliable mechanical limiting.

[0027] The stop 6 is a spherical structure and is located on the central axis of the ring 7. The spherical stop 6 and the ring 7 form a spherical-ring contact, which has high positioning accuracy and concentrated contact stress, and it detaches quickly after melting; the spherical shape is non-directional, and the assembly is simple.

[0028] The melting temperature of the stop 6 is 70℃~120℃. The stop 6 melts and triggers the protection state upon reaching the specified temperature. Those skilled in the art can select fusible alloys with different melting points to set the trigger temperature according to their needs, without changing other parts, thus adapting to various installation environments. Specifically, the temperature can be set to 70℃, 90℃, 100℃, or 120℃.

[0029] The connector 2 is provided with a mounting base 8, and a sealing plug 5 is movably mounted on the mounting base 8. The sealing plug 5 has a T-shaped cross-section. The T-shaped sealing plug 5 works with the mounting base 8 to provide axial guidance and ensure smooth movement. The shoulder of the T-shaped sealing plug 5 can directly bear the spring force, resulting in a compact structure and reduced number of parts.

[0030] The sealing plug 5 includes a plug head 5a and a plug rod 5b coaxially connected. The plug head 5a has a disc-shaped structure, and its outer diameter is adapted to the channel opening 3. When the plug head 5a is in contact with the channel opening 3, it blocks the channel opening 3. The disc-shaped plug head 5a and the channel opening 3 form a surface-to-surface hard seal, with a large contact area and reliable sealing. The matching of the outer diameter of the plug head 5a with the channel opening 3 ensures zero leakage after closure.

[0031] The stopper rod 5b is movably mounted at the mounting base 8. The elastic element 4 is a spring, which is sleeved on the stopper rod 5b. One end of the elastic element 4 abuts against the mounting base 8, and the other end abuts against the stopper head 5a. The elastic element 4 is in a compressed state. The spring sleeved on the stopper rod 5b forms an internal guide. The energy stored in the compressed spring acts directly on the stopper head 5a, resulting in fast response, short stroke, and small space occupation.

[0032] The first end of the connector 2 is inserted into the valve body 1, and the outer peripheral surface of the first end of the connector 2 is in contact with the inner wall surface of the valve body 1, forming a sealed connection. This insertion allows for automatic alignment during assembly, reducing coaxiality errors; the contact surface also bears part of the axial force, improving connection strength. Preferably, the outer peripheral surface of the first end of the connector 2 is bonded to the inner wall surface of the valve body 1 with adhesive. Specifically, the adhesive used in this application is a high-temperature resistant adhesive, ensuring it will not fail in the event of a fire.

[0033] The rest of the contents of Example 2 are the same as those of Example 1.

[0034] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A high temperature protection shut-off valve characterized by, The device includes a valve body (1) and a connector (2), both of which are tubular structures. The valve body (1) and the connector (2) are connected together. A channel opening (3) is provided inside the valve body (1). A sealing plug (5) is installed inside the connector (2) through an elastic element (4). One side of the sealing plug (5) is connected to the elastic element (4), and the other side of the sealing plug (5) is connected to a stop (6). The stop (6) is located between the sealing plug (5) and the channel opening (3). The elastic element (4) applies a force to the sealing plug (5) to move towards the channel opening (3). The stop (6) abuts against the channel opening (3). The stop (6) is a temperature sensing element and melts at a predetermined temperature.

2. A high temperature protection shut-off valve according to claim 1, wherein A circular ring (7) is provided at the channel opening (3), and a connecting rod (9) is provided on the outer periphery of the circular ring (7). The circular ring (7) is connected to the inner wall of the channel opening (3) through the connecting rod (9).

3. A high temperature protection shut-off valve according to claim 2, wherein The annular component (7) is arranged on the same central axis as the valve body (1), and the inner diameter of the annular component (7) is smaller than the outer diameter of the stop component (6).

4. The high temperature protection shutoff valve of claim 1, wherein, The stop (6) is a spherical structure and is located on the central axis of the ring (7).

5. The high temperature protection shutoff valve of claim 1, wherein, The melting temperature of the stop (6) is 70℃~120℃.

6. A high temperature protection shut-off valve according to claim 1, wherein The connector (2) is provided with a mounting base (8), and a sealing plug (5) is movably installed at the mounting base (8). The cross-section of the sealing plug (5) is T-shaped.

7. A high temperature protection shut-off valve according to claim 6, wherein The sealing plug (5) includes a plug head (5a) and a plug rod (5b) connected coaxially. The plug head (5a) has a disc-shaped structure. The outer diameter of the plug head (5a) is adapted to the channel opening (3). When the plug head (5a) fits into the channel opening (3), it blocks the channel opening (3).

8. A high temperature protection shut-off valve according to claim 7, wherein The stopper rod (5b) is movably mounted at the mounting base (8). The elastic element (4) is a spring. The elastic element (4) is sleeved on the outside of the stopper rod (5b). One end of the elastic element (4) abuts against the mounting base (8), and the other end of the elastic element (4) abuts against the stopper head (5a). The elastic element (4) is in a compressed state.

9. The high temperature protection shut-off valve of claim 1, wherein, The first end of the connector (2) is inserted into the valve body (1), and the outer peripheral surface of the first end of the connector (2) is in contact with the inner wall surface of the valve body (1), and the outer peripheral surface of the first end is sealed to the inner wall surface of the valve body (1).

10. A high temperature protection shut-off valve according to claim 9, wherein The outer peripheral surface of the first end of the connector (2) is bonded to the inner wall surface of the valve body (1) with glue.

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