Safety valve structure special for liquefied natural gas

Abstract

The utility model discloses a special safety valve structure for liquefied natural gas, and relates to the technical field of safety valves. The device comprises a shell, a valve mechanism and a fixing mechanism are arranged on the shell, the valve mechanism comprises a linkage assembly and a valve assembly, the linkage assembly comprises a first connecting pipe arranged on the left side of the shell in a communicated mode, a second connecting pipe is arranged on the right side of the shell in a communicated mode, a clamping block is fixedly connected to the inner wall of the second connecting pipe, and the clamping block is fixedly connected to the inner wall of the second connecting pipe. According to the safety valve structure special for liquefied natural gas, by arranging the valve mechanism, the problems that in the using process of an existing safety valve structure special for liquefied natural gas, the opening and closing degree of a valve is inconvenient to adjust, if the opening and closing degree is large, the overpressure risk of a device can be caused, parts of equipment can be damaged, and the safety valve structure special for liquefied natural gas cannot be adjusted easily are solved. And if the opening and closing degree is small, the pressure in the device is too low, so that the production efficiency is reduced, and the production cost is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety valves, in particular to a special safety valve structure for liquefied natural gas. Background Art

[0002] During storage and transportation, liquefied natural gas is exposed to low temperatures and pressure fluctuations. Traditional safety valves are difficult to fully adapt to these conditions and are prone to problems such as sealing failure and inaccurate operation. Because the temperature of liquefied natural gas is extremely low, ordinary materials are prone to brittle cracking, and seals may harden and lose elasticity at low temperatures, affecting the sealing effect. At the same time, the large range of pressure fluctuations requires safety valves to accurately sense and respond in a timely manner. Traditional safety valves have deficiencies in the coordination of pressure setting and rapid response. In addition, the flammable and explosive properties of liquefied natural gas also place extremely stringent requirements on the reliability and safety of safety valves, so a safety valve structure specially designed for its characteristics is required.

[0003] However, the existing liquefied natural gas safety valve structure is not convenient for adjusting the opening and closing degree of the valve during use. If the opening and closing degree is large, it will lead to the risk of overpressure in the device, causing damage to the equipment components and reducing the service life of the equipment. If the opening and closing degree is small, it will cause the pressure in the device to be too low, reducing production efficiency and thus increasing production costs. Utility Model Content

[0004] The purpose of the utility model is to provide a safety valve structure dedicated to liquefied natural gas. By setting up a valve mechanism, the problem that the existing safety valve structure dedicated to liquefied natural gas is not convenient to adjust the opening and closing degree of the valve during use is solved. If the opening and closing degree is large, it will lead to the risk of overpressure in the device, which will damage the parts of the equipment and reduce the service life of the equipment. If the opening and closing degree is small, it will cause the pressure in the device to be too low, which will reduce production efficiency and thus increase production costs.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a safety valve structure dedicated to liquefied natural gas, comprising a housing, on which a valve mechanism and a fixing mechanism are provided;

[0007] The valve mechanism includes a linkage assembly and a valve assembly. The linkage assembly includes a connecting pipe 1 connected to the left side of the shell, and a connecting pipe 2 is connected to the right side of the shell. A card block is fixedly connected to the inner wall of the connecting pipe 2.

[0008] Furthermore, a bracket is fixedly connected to the bottom inner wall of the shell, and a threaded rod is threaded through the bracket.

[0009] Furthermore, a rotating shaft is rotatably connected to the top of the shell, and the rotating shaft is rotatably extended into the shell, and a bevel gear 1 is fixedly connected to the outer wall of the rotating shaft.

[0010] Furthermore, the valve assembly includes a second bevel gear threadedly connected to the outer wall of the threaded rod, the second bevel gear meshes with the first bevel gear, and a valve is provided inside the second connecting pipe, and the valve is adapted to the block.

[0011] Furthermore, a slider 1 is slidably connected to the inner wall of the valve, the left side of the slider 1 is fixedly connected to the threaded rod, and a spring damper 1 is fixedly connected to the right inner wall of the valve, and the left side of the spring damper 1 is fixedly connected to the slider 1.

[0012] Furthermore, the fixing mechanism includes a rotating assembly and a plurality of snap assemblies. The rotating assembly includes a handle fixedly connected to the outer wall of the rotating shaft. A connecting block is fixedly connected to the outer wall of the rotating shaft.

[0013] Furthermore, the buckle assembly includes a sliding groove provided at the bottom of the connecting block, and a slider 2 is slidably connected to the inner wall of the sliding groove.

[0014] Furthermore, a groove is provided on the top of the shell, the groove is adapted to the second slide block, a spring damper second is fixedly connected to the top inner wall of the slide groove, and the bottom of the spring damper second is fixedly connected to the second slide block.

[0015] The utility model has the following beneficial effects:

[0016] 1. By setting up a valve mechanism, the handle can be turned. When the handle is turned, the bevel gear 2 will be driven to rotate through the rotating shaft under the action of the bevel gear 1. When the bevel gear 2 rotates, the valve assembly will be driven to move to the right or to the left through the threaded rod. When the valve assembly moves to the right, the opening and closing degree of the valve will become smaller. When the valve assembly moves to the left, the opening and closing degree of the valve will become larger, making it easier to adjust the opening and closing degree of the valve, avoiding the situation where the valve opening and closing degree is too large, resulting in excessive pressure in the device, preventing it from causing wear on the parts of the device, thereby extending the service life of the device, and at the same time avoiding the situation where the pressure in the device is low due to the small opening and closing degree of the valve, thereby ensuring the stability of the production process;

[0017] 2. By setting a fixing mechanism, when the handle is turned, the slider 2 will slide into the slide groove under the action of the groove. When the slider 2 slides into the slide groove, it will apply pressure to the spring damper 2, causing it to elastically deform and generate elastic force. When the slider 2 completely slides into the slide groove, turning the handle will drive the connecting block to rotate, causing the slider 2 to slide into the next groove under the action of the spring damper 2. When there is no need to rotate, release the handle. Under the action of the snap assembly, the rotating shaft will be fixed by the handle, so that the structure that controls the opening and closing of the valve can be fixed to prevent it from rotating additionally, thereby avoiding the automatic opening and closing of the valve during production, thereby further stabilizing the production process and improving production efficiency.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the left side cross-sectional structure of the utility model;

[0022] Figure 3 This is a partial cross-sectional structural diagram of the valve assembly of the utility model;

[0023] Figure 4 It is a partial cross-sectional structural diagram of the fixing mechanism of the utility model;

[0024] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure of A in the figure.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1. Housing; 2. Valve mechanism; 21. Linkage assembly; 211. Connecting pipe 1; 212. Connecting pipe 2; 213. Clamping block; 214. Bracket; 215. Threaded rod; 216. Rotating shaft; 217. Bevel gear 1; 22. Valve assembly; 221. Bevel gear 2; 222. Valve; 223. Slider 1; 224. Spring damper 1; 3. Fixing mechanism; 31. Rotating assembly; 311. Handle; 312. Connecting block; 32. Buckle assembly; 321. Slide groove; 322. Slider 2; 323. Groove; 324. Spring damper 2. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-5 As shown, the utility model is a special safety valve structure for liquefied natural gas, including a shell 1, a valve mechanism 2 and a fixing mechanism 3 are provided on the shell 1, the valve mechanism 2 includes a linkage assembly 21 and a valve assembly 22, the linkage assembly 21 includes a connecting pipe 1 211 connected to the left side of the shell 1, and a connecting pipe 212 is provided on the right side of the shell 1, a clamping block 213 is fixedly connected to the inner wall of the connecting pipe 212, a bracket 214 is fixedly connected to the bottom inner wall of the shell 1, a threaded rod 215 is threaded through the bracket 214, a rotating shaft 216 is rotatably connected to the top of the shell 1, the rotating shaft 216 rotates and extends into the shell 1, a bevel gear 1 217 is fixedly connected to the outer wall of the rotating shaft 216, the valve assembly 22 includes a bevel gear 221 threadedly connected to the outer wall of the threaded rod 215, and a bevel gear 221 is threadedly connected to the outer wall of the threaded rod 215. 221 is meshed with bevel gear 1 217, and a valve 222 is provided inside the connecting pipe 212, and the valve 222 is adapted to the block 213. A slider 223 is slidably connected to the inner wall of the valve 222, and the left side of the slider 223 is fixedly connected to the threaded rod 215. A spring damper 224 is fixedly connected to the right inner wall of the valve 222, and the left side of the spring damper 224 is fixedly connected to the slider 223. By setting up the valve mechanism, the opening and closing degree of the valve can be adjusted more conveniently, avoiding the situation where the valve opening and closing degree is large, resulting in excessive pressure in the device, preventing it from wearing out the parts of the device, thereby extending the service life of the device, and at the same time avoiding the situation where the pressure in the device is low due to the small opening and closing degree of the valve, thereby ensuring the stability of the production process.

[0029] The fixing mechanism 3 includes a rotating component 31 and several snap components 32. The rotating component 31 includes a handle 311 fixedly connected to the outer wall of the rotating shaft 216, and a connecting block 312 is fixedly connected to the outer wall of the rotating shaft 216. The snap component 32 includes a slide groove 321 opened at the bottom of the connecting block 312, and a second slider 322 is slidably connected to the inner wall of the slide groove 321. A groove 323 is opened at the top of the shell 1, and the groove 323 is adapted to the second slider 322. A second spring damper 324 is fixedly connected to the inner wall of the top of the slide groove 321, and the bottom of the second spring damper 324 is fixedly connected to the second slider 322. By setting up a fixing mechanism, the structure for controlling the opening and closing of the valve can be fixed to prevent it from performing additional rotation, thereby avoiding the automatic opening and closing of the valve during production, thereby further stabilizing the production process and improving production efficiency.

[0030] A specific application of this embodiment is: when in use, first move the device to the corresponding position, and turn the handle 311. When the handle 311 is rotated, the bevel gear 2 221 will be driven to rotate through the rotating shaft 216 under the action of the bevel gear 1 217. When the bevel gear 221 rotates, the valve assembly 22 will be driven to move to the right or to the left through the threaded rod 215. When the valve assembly 22 moves to the right, the opening and closing degree of the valve 222 will become smaller. When the valve assembly 22 moves to the left, the opening and closing degree of the valve 222 will become larger, making it easier to adjust the opening and closing degree of the valve, avoiding the situation where the valve opening and closing degree is large, resulting in excessive pressure in the device, preventing it from wearing out the parts of the device, thereby extending the service life of the device, and at the same time avoiding the situation where the pressure in the device is low due to the small opening and closing degree of the valve. When the cam 322 is in the closed position, the second slider 322 will slide into the groove 321 under the action of the groove 323. When the cam 322 is in the closed position, the second slider 322 will slide into the groove 321 under the action of the groove 323. When the cam 322 is in the closed position, the second slider 322 will slide into the groove 321 under the action of the groove 321. When the cam 322 is in the closed position, the second slider 322 will slide into the groove 321 under the action of the groove 321.

[0031] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A safety valve structure for liquefied natural gas, comprising a housing (1), characterized in that: The housing (1) is provided with a valve mechanism (2) and a fixing mechanism (3); The valve mechanism (2) comprises a linkage assembly (21) and a valve assembly (22); the linkage assembly (21) comprises a first connecting pipe (211) arranged in communication with the left side of the housing (1); a second connecting pipe (212) is arranged in communication with the right side of the housing (1); a clamping block (213) is fixedly connected to the inner wall of the second connecting pipe (212).

2. A liquefied natural gas safety valve structure according to claim 1, characterized in that: A bracket (214) is fixedly connected to the inner wall of the bottom of the housing (1), and a threaded rod (215) is threadedly passed through the bracket (214).

3. A liquefied natural gas safety valve structure according to claim 2, characterized in that: The top of the housing (1) is rotatably connected to a rotating shaft (216), the rotating shaft (216) rotatably extends into the housing (1), and a bevel gear (217) is fixedly connected to the outer wall of the rotating shaft (216).

4. A liquefied natural gas safety valve structure according to claim 3, characterized in that: The valve assembly (22) includes a second bevel gear (221) threadedly connected to the outer wall of the threaded rod (215), the second bevel gear (221) meshing with the first bevel gear (217), and a valve (222) is provided inside the second connecting pipe (212), and the valve (222) is adapted to the block (213).

5. A liquefied natural gas safety valve structure according to claim 4, characterized in that: A slider 1 (223) is slidably connected to the inner wall of the valve (222), and the left side of the slider 1 (223) is fixedly connected to the threaded rod (215). A spring damper 1 (224) is fixedly connected to the right inner wall of the valve (222), and the left side of the spring damper 1 (224) is fixedly connected to the slider 1 (223).

6. A liquefied natural gas safety valve structure according to claim 5, characterized in that: The fixing mechanism (3) comprises a rotating assembly (31) and a plurality of snap assemblies (32); the rotating assembly (31) comprises a handle (311) fixedly connected to the outer wall of the rotating shaft (216); and a connecting block (312) is fixedly connected to the outer wall of the rotating shaft (216).

7. A liquefied natural gas safety valve structure according to claim 6, characterized in that: The buckle assembly (32) includes a slide groove (321) provided at the bottom of the connecting block (312), and a second slider (322) is slidably connected to the inner wall of the slide groove (321).

8. A liquefied natural gas safety valve structure according to claim 7, characterized in that: The top of the housing (1) is provided with a groove (323), the groove (323) is adapted to the second slider (322), the top inner wall of the slide groove (321) is fixedly connected to the second spring damper (324), and the bottom of the second spring damper (324) is fixedly connected to the second slider (322).

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