A gas safety valve

Abstract

This utility model relates to a gas safety valve, comprising a valve body, a valve core, a spring, a pressure regulating sleeve, a pressure regulating screw, and a pressure regulating washer. The valve body has a first threaded hole, an exhaust chamber, and an intake chamber connected sequentially from top to bottom. A valve port is formed between the lower end of the intake chamber and the upper end of the exhaust chamber. The valve body has an intake hole located around the intake chamber and an exhaust hole located around the exhaust chamber. The valve core body, the pressure regulating washer, and the spring are all located in the exhaust chamber. The upper end of the spring supports the pressure regulating washer upwards, and the lower end supports the body downwards. The body closes the valve port. The pressure regulating sleeve is threaded into the first threaded hole, and the pressure regulating screw is threaded into the pressure regulating sleeve. The pressure regulating washer is connected to the lower end of the pressure regulating screw. This utility model features easy adjustment of the opening pressure, a wider adjustment range, and more adjustment methods. It also improves the sealing performance, stability, and safety of the gas safety valve and reduces the difficulty of disassembling and assembling it.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a gas safety valve. Background Technology

[0002] In traditional internal combustion engine systems, exhaust valves are typically used to regulate exhaust emissions. However, in certain situations (such as exhaust system blockage or excessive pressure), exhaust valves may malfunction, preventing exhaust gases from being discharged smoothly. This can lead to excessive pressure in the internal combustion engine system, decreased engine performance, or even damage.

[0003] To alleviate this problem, existing technologies typically employ additional pressure relief devices to release excessive gas pressure, such as gas safety valves. However, existing safety valves suffer from the following technical issues: safety valves usually have an opening pressure regulating structure, but existing structures have limited adjustment ranges and limited adjustment methods; the internal components of existing safety valves are difficult to disassemble and assemble, hindering assembly and maintenance; the sealing surface between the valve port and valve core in some safety valves is improperly designed, potentially leading to leaks; and safety valves are susceptible to corrosion and damage in high-temperature, high-pressure, and heavy oil environments, requiring improvements in stability and safety. Utility Model Content

[0004] The purpose of this invention is to provide a gas safety valve to alleviate or eliminate at least one of the aforementioned technical problems.

[0005] This utility model discloses a gas safety valve, comprising a valve body, a valve core, a spring, a pressure regulating sleeve, a pressure regulating screw, and a pressure regulating washer. The valve body has a first threaded hole, an exhaust chamber, and an intake chamber connected sequentially from top to bottom. The inner diameter of the exhaust chamber is larger than the inner diameter of the first threaded hole, and the inner diameter of the exhaust chamber is larger than the inner diameter of the intake chamber. A valve port is formed between the lower end of the intake chamber and the upper end of the exhaust chamber. The valve body has an intake hole located around the intake chamber and an exhaust hole located around the exhaust chamber. Both the intake hole and the exhaust hole are through holes. The valve core body, the pressure regulating washer, and the spring are all located in the exhaust chamber. The upper end of the spring is supported upwards on the pressure regulating washer, and the lower end of the spring is supported downwards on the body. The body closes the valve port. The pressure regulating sleeve is threaded into the first threaded hole, the pressure regulating screw is threaded into the pressure regulating sleeve, and the pressure regulating washer is connected to the lower end of the pressure regulating screw.

[0006] Optionally, the pressure regulating pad is detachably connected to the lower end of the pressure regulating screw.

[0007] Optionally, the valve body includes a first valve body component and a second valve body component detachably connected to the lower side of the first valve body component. The first valve body component has a first threaded hole and a first inner cavity located below the first threaded hole. The second valve body component has the air intake cavity and a second inner cavity located above the air intake cavity. The first inner cavity and the second inner cavity communicate to form the exhaust cavity.

[0008] Optionally, a soft nitriding layer is formed on the surface of the second valve body.

[0009] Optionally, sealing rings are installed on the outer periphery of the parting surfaces of the first valve body and the second valve body.

[0010] Optionally, the valve port includes a first conical sealing surface disposed at the upper end of the intake chamber and a first sealing plane disposed on the lower side of the exhaust chamber. The first sealing plane surrounds the periphery of the upper end of the intake chamber. The main body is provided with a second sealing plane for cooperating with the first sealing plane to form a seal. The main body is also provided with a second conical sealing surface for cooperating with the first conical sealing surface to form a seal.

[0011] Optionally, the air intake chamber extends downward through the valve body, and a steel ball is installed at the lower end of the air intake chamber. The valve core includes an extension rod that extends downward into the air intake chamber, and a spherical groove for cooperating with the steel ball is provided on the lower end face of the extension rod.

[0012] Optionally, the upper end of the pressure regulating screw extends upward from the pressure regulating sleeve, and the upper end of the pressure regulating screw is provided with a bolt head.

[0013] Optionally, the upper part of the pressure regulating sleeve extends upward from the valve body, a first locking washer is fitted on the upper part of the pressure regulating sleeve, and a locking nut is threadedly connected to the upper part of the pressure regulating sleeve. The locking nut presses the first locking washer downward onto the valve body.

[0014] Optionally, the valve body is equipped with a protective cover that surrounds the pressure regulating sleeve and the pressure regulating screw.

[0015] This invention features easy adjustment of opening pressure, a wider range of opening pressure adjustment, and more methods for adjusting opening pressure. It also improves the sealing performance of the gas safety valve, reduces the difficulty of disassembling and assembling the gas safety valve, and enhances the stability and safety of the gas safety valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the gas safety valve described in some embodiments;

[0017] Figure 2This is a cross-sectional view of the gas safety valve described in some embodiments.

[0018] In the diagram, 1—first valve body component, 2—second valve body component, 3—valve core, 4—spring, 5—pressure adjusting sleeve, 6—pressure adjusting screw, 7—locking nut, 8—first locking washer, 9—pressure adjusting washer, 10—protective cover, 11—steel ball, 12—sealing gasket, 13—sealing ring, 14—second locking washer.

[0019] 101—First inner cavity, 102—First threaded hole,

[0020] 201—Large outer diameter section, 202—Small outer diameter section, 203—Inlet chamber, 204—Inlet port, 205—Second inner cavity, 206—Exhaust port, 207—First sealing plane, 208—First conical sealing surface.

[0021] 301—Outer flange, 302—Second conical sealing surface, 303—Extension rod. Detailed Implementation

[0022] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] like Figure 1 and Figure 2The gas safety valve shown includes a valve body, a valve core 3, a spring 4, a pressure regulating sleeve 5, a pressure regulating screw 6, and a pressure regulating gasket 9. The valve body has a first threaded hole 102, an exhaust chamber, and an intake chamber 203 connected sequentially from top to bottom. The inner diameter of the exhaust chamber is larger than the inner diameter of the first threaded hole 102, and the inner diameter of the exhaust chamber is larger than the inner diameter of the intake chamber 203. A valve port is formed between the lower end of the intake chamber 203 and the upper end of the exhaust chamber. A valve body is provided located in the intake chamber. The air inlet on the periphery of 203 and the exhaust port on the periphery of the exhaust chamber are both through holes. The main body of the valve core 3, the pressure regulating pad 9, and the spring 4 are all located in the exhaust chamber. The upper end of the spring 4 is supported upward on the pressure regulating pad 9, and the lower end of the spring 4 is supported downward on the main body. The main body closes the valve port. The pressure regulating sleeve 5 is threadedly engaged with the first threaded hole 102. The pressure regulating screw 6 is threadedly engaged with the pressure regulating sleeve 5. The pressure regulating pad 9 is connected to the lower end of the pressure regulating screw 6.

[0025] By adopting the above technical solution, a multi-stage pressure regulating structure can be formed by using the pressure regulating sleeve 5 and the pressure regulating screw 6, which can more conveniently and over a wider range of adjust the opening pressure of the gas safety valve.

[0026] In some embodiments, the pressure regulating shim 9 is detachably connected to the lower end of the pressure regulating screw 6. Using the above technical solution, the opening pressure of the gas safety valve can be adjusted by replacing the pressure regulating shims 9 of different thicknesses, enriching the means of adjusting the opening pressure and facilitating a wider range of adjustment of the gas safety valve's opening pressure.

[0027] In practical implementation, the pressure regulating shim 9 can be threaded to the lower end of the pressure regulating screw 6 through its central threaded hole, which is easy to assemble.

[0028] In some embodiments, the valve body includes a first valve body component 1 and a second valve body component 2 detachably connected to the lower side of the first valve body component 1. The first valve body component 1 has a first threaded hole 102 and a first inner cavity 101 located below the first threaded hole 102. The second valve body component 2 has an air inlet cavity 203 and a second inner cavity 205 located above the air inlet cavity 203. The first inner cavity 101 and the second inner cavity 205 communicate to form an exhaust cavity. Using the above technical solution, the first valve body component 1 and the second valve body component 2 are designed as separate units and sealed with a sealing ring 13, facilitating the assembly and maintenance of the internal parts of the gas safety valve.

[0029] In some embodiments, the upper part of the second valve body 2 is a large outer diameter portion 201, the lower part of the second valve body 2 is a small outer diameter portion 202, the second inner cavity 205 is disposed in the large outer diameter portion 201, and the air intake cavity 203 is disposed in the small outer diameter portion 202. Further, the outer diameter of the large outer diameter portion 201 is larger than the outer diameter of the small outer diameter portion 202, and a sealing gasket 12 is provided at the stepped surface between the large outer diameter portion 201 and the small outer diameter portion 202.

[0030] In some embodiments, a soft nitriding layer is formed on the surface of the second valve body 2. By employing the above technical solution, the soft nitriding layer provides the second valve body 2 with a certain degree of high-temperature resistance, effectively preventing corrosion from exhaust gases in the low-speed engine exhaust system. In specific implementations, the soft nitriding layer can be formed through a soft nitriding process.

[0031] Furthermore, the second valve body 2 can be manufactured using corrosion-resistant materials and subjected to soft nitriding treatment. This allows the second valve body 2 to maintain its strength while possessing a certain degree of high-temperature resistance, effectively preventing corrosion from exhaust gases in the low-speed engine exhaust system and enhancing the mechanical properties of the second valve body 2. In specific implementations, corrosion-resistant materials such as stainless steel and nickel-based alloys can be selected.

[0032] In some embodiments, a sealing ring 13 is installed on the outer periphery of the parting surface of the first valve body 1 and the second valve body 2. By adopting the above technical solution, the sealing performance of the gas safety valve can be guaranteed. In specific implementations, a V-groove for installing the sealing ring 13 can be provided on the outer periphery of the parting surface, and the sealing ring 13 can be an O-ring.

[0033] In some embodiments, the valve port includes a first conical sealing surface 208 disposed at the upper end of the intake chamber 203 and a first sealing plane 207 disposed on the lower side of the exhaust chamber. The first sealing plane 207 surrounds the outer periphery of the upper end of the intake chamber 203. A second sealing plane is disposed on the main body for cooperating with the first sealing plane 207 to form a seal, and a second conical sealing surface 302 is disposed on the main body for cooperating with the first conical sealing surface 208 to form a seal. Using the above technical solution, the first sealing plane 207 and the second sealing plane cooperate to form a planar seal, and the first conical sealing surface 208 and the second conical seal cooperate to form a conical seal, forming two seals: a planar seal and a conical seal. This effectively isolates the intake chamber 203 from the exhaust chamber, ensuring the gas safety valve can function normally.

[0034] In specific implementation, the upper part of the main body is provided with an outer flange 301, and the lower side of the outer flange 301 can form a second sealing plane. The lower part of the main body is provided with a conical part, and the outer surface of the conical part can form a second conical sealing surface 302. The upper end of the extension rod 303 is connected to the conical part.

[0035] In practical implementation, the outer flange 301 can also provide support for the spring 4, serving as a spring seat.

[0036] In some embodiments, the intake chamber 203 extends downward through the valve body, and a steel ball 11 is installed at the lower end of the intake chamber 203. The valve core 3 includes an extension rod 303 extending downward into the intake chamber 203, and a spherical groove for engaging with the steel ball 11 is provided on the lower end face of the extension rod 303. By adopting the above technical solution, providing a spherical groove on the lower end face of the extension rod 303 can increase the contact surface with the steel ball 11, prevent excessive deformation of the sealing surface of the valve core 3, and allow manual testing of the pressure relief process of the safety valve.

[0037] In some embodiments, the upper end of the pressure regulating screw 6 extends upward from the pressure regulating sleeve 5, and a bolt head is provided at the upper end of the pressure regulating screw 6. By adopting the above technical solution, the bolt head facilitates the rotation of the screw using a tool. In a specific implementation, a second locking washer 14 can be installed between the bolt head and the pressure regulating sleeve 5.

[0038] In some embodiments, the upper part of the pressure regulating sleeve 5 extends upward from the valve body, and a first locking washer 8 is fitted onto the upper part of the pressure regulating sleeve 5. A locking nut 7 is threadedly connected to the upper part of the pressure regulating sleeve 5, and the locking nut 7 presses the first locking washer 8 downward onto the valve body. Using the above technical solution, the locking nut 7 serves to lock the pressure regulating sleeve 5, ensuring the accuracy of pressure regulation.

[0039] In some embodiments, a protective cover 10 is installed on the valve body, covering the pressure regulating sleeve 5 and the pressure regulating screw 6. Using the above-described technical solution, the protective cover 10 can protect the pressure regulating sleeve 5 and the pressure regulating screw 6 from external influences, improving the reliability of pressure regulation.

[0040] When the gas safety valve is in use, the intake chamber 203 is connected to the engine exhaust system, and the exhaust chamber is connected to a specific exhaust device through a dedicated pipe. The spring 4 is the energy storage device of the gas safety valve. The pressure on the valve core 3 is changed by adjusting the compression of the spring 4 through the pressure adjusting screw 6, pressure adjusting shim 9, and pressure adjusting sleeve 5. When the pressure of the gas in the intake chamber 203 on the valve core 3 is higher than the pressure of the spring 4 on the valve core 3, the spring 4 compresses, and the valve core 3 moves upward to open the valve port, connecting the intake chamber 203 and the exhaust chamber. High-pressure gas enters the exhaust chamber from the intake chamber 203 and is discharged through the exhaust port 206. As high-pressure gas continuously exits through the exhaust port 206, the pressure at the intake port 204 gradually decreases. When the pressure of the gas in the intake chamber 203 on the valve core 3 is lower than the pressure of the spring 4 on the valve core 3, the spring 4 gradually extends, and the valve core 3 moves downward until the valve port is closed, thus completing one cycle of operation.

[0041] The gas safety valve proposed in this application is suitable for the exhaust system of high-power marine engines. Its main function is to maintain stable pressure within the cylinder cavity of the exhaust valve, ensuring the safety and reliability of the engine system. Compared with conventional safety valves, the gas safety valve proposed in this application not only allows for flexible and accurate control of the opening pressure but also effectively ensures normal operation under high temperature, high pressure, and heavy oil conditions.

[0042] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A gas safety valve, characterized in that, The valve includes a valve body, a valve core, a spring, a pressure regulating sleeve, a pressure regulating screw, and a pressure regulating washer. The valve body has a first threaded hole, an exhaust chamber, and an intake chamber connected sequentially from top to bottom. The inner diameter of the exhaust chamber is larger than the inner diameter of the first threaded hole, and the inner diameter of the exhaust chamber is larger than the inner diameter of the intake chamber. A valve port is formed between the lower end of the intake chamber and the upper end of the exhaust chamber. The valve body has an intake hole located around the intake chamber and an exhaust hole located around the exhaust chamber. The main body of the valve core, the pressure regulating washer, and the spring are all located in the exhaust chamber. The upper end of the spring supports upward on the pressure regulating washer, and the lower end of the spring supports downward on the main body. The main body closes the valve port. The pressure regulating sleeve is threaded into the first threaded hole, the pressure regulating screw is threaded into the pressure regulating sleeve, and the pressure regulating washer is connected to the lower end of the pressure regulating screw.

2. The gas safety valve according to claim 1, characterized in that, The pressure regulating pad is detachably connected to the lower end of the pressure regulating screw.

3. The gas safety valve according to claim 1, characterized in that, The valve body includes a first valve body component and a second valve body component detachably connected to the lower side of the first valve body component. The first valve body component has a first threaded hole and a first inner cavity located below the first threaded hole. The second valve body component has an air intake cavity and a second inner cavity located above the air intake cavity. The first inner cavity and the second inner cavity communicate to form the exhaust cavity.

4. The gas safety valve according to claim 3, characterized in that, The surface of the second valve body is formed with a soft nitriding layer.

5. The gas safety valve according to claim 3, characterized in that, A sealing ring is installed on the outer periphery of the parting surface of the first valve body and the second valve body.

6. The gas safety valve according to claim 1, characterized in that, The valve port includes a first conical sealing surface disposed at the upper end of the air intake chamber and a first sealing plane disposed on the lower side of the exhaust chamber. The first sealing plane surrounds the periphery of the upper end of the air intake chamber. The main body is provided with a second sealing plane for cooperating with the first sealing plane to form a seal. The main body is provided with a second conical sealing surface for cooperating with the first conical sealing surface to form a seal.

7. The gas safety valve according to claim 1, characterized in that, The air intake chamber extends downward through the valve body, and a steel ball is installed at the lower end of the air intake chamber. The valve core includes an extension rod that extends downward into the air intake chamber, and a spherical groove for cooperating with the steel ball is provided on the lower end face of the extension rod.

8. The gas safety valve according to claim 1, characterized in that, The upper end of the pressure regulating screw extends upward from the pressure regulating sleeve, and a bolt head is provided at the upper end of the pressure regulating screw.

9. The gas safety valve according to claim 1, characterized in that, The upper part of the pressure regulating sleeve extends upward from the valve body. A first locking washer is fitted on the upper part of the pressure regulating sleeve. A locking nut is threadedly connected to the upper part of the pressure regulating sleeve. The locking nut presses the first locking washer downward onto the valve body.

10. The gas safety valve according to claim 1, characterized in that, The valve body is equipped with a protective cover that surrounds the pressure regulating sleeve and the pressure regulating screw.

Images