Valve heat preservation device

Abstract

The utility model provides a valve heat preservation device which comprises a wrapping main body, the wrapping main body comprises a first connecting end and a second connecting end which are oppositely arranged, the wrapping main body forms a cylindrical structure in a surrounding mode through mutual approaching of the first connecting end and the second connecting end, and the wrapping main body further comprises a first side wall, a second side wall and a heating layer; the first side wall and the second side wall are arranged in a spaced mode to form a containing cavity, the heating layer is arranged in the containing cavity and attached to the first side wall, and the first connecting end and the second connecting end are arranged on the second side wall. According to the valve heat preservation device, the wrapping body comprises the first side wall and the second side wall, the heating layer is arranged in the containing cavity formed by the first side wall and the second side wall in a spaced mode, and the heating layer and the first side wall are arranged in an attached mode. When the wrapping body wraps the outer side of the valve, the first side wall makes contact with the valve in an attached mode, at the moment, the heating layer transmits heat to the valve filler to prevent the valve filler from shrinking when encountering cold, and therefore the sealing performance of the valve is improved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a valve insulation device. Background Art

[0002] Valves are piping accessories used to open and close pipelines, control flow direction, and regulate and control the transported medium. Valves are control components in fluid transport systems, with functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion, or overflow and pressure relief.

[0003] Valves can be used in low-temperature environments, such as cryogenic valves and cryogenic valves, which are valves whose working temperature is much lower than the ambient temperature. In particular, cryogenic valves can work in an environment close to absolute zero. Cryogenic valves are suitable for handling liquefied gases such as liquefied natural gas, liquid oxygen, liquid nitrogen, etc.

[0004] When valves are used in low-temperature environments, such as when installed on liquefied natural gas (LNG) storage tanks or air separation units, both of which remain low, the valves are affected by the low temperatures. The sealing packing in the valve stuffing box shrinks due to the cold, making it unable to maintain close contact with the valve stem. This affects the sealing performance of the valve and causes fluid leakage. These problems need to be solved urgently. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a valve insulation device to enable the valve to maintain good sealing performance in a low-temperature working environment.

[0006] In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present application:

[0007] The present application provides a valve insulation device, which includes a covering body, which is a flexible member that can be bent. The covering body includes a first connecting end and a second connecting end that are oppositely arranged. The first connecting end and the second connecting end are brought closer together to form a cylindrical structure.

[0008] The covering body also includes a first side wall, a second side wall and a heating layer. The first side wall and the second side wall are spaced apart to form a accommodating cavity. The heating layer is arranged in the accommodating cavity and is attached to the first side wall. The first connecting end and the second connecting end are arranged on the second side wall.

[0009] In some embodiments of the present application, the covering body further comprises:

[0010] The heat-insulating layer is arranged in the accommodating cavity, and is stacked on the heating layer and located between the heating layer and the second side wall.

[0011] In some embodiments of the present application, the heating layer includes a plurality of heating strips, which are arranged at intervals on the first side wall, and the extending direction of the heating strips is parallel to the axis of the cylindrical structure surrounded by the covering body.

[0012] In some embodiments of the present application, the heating layer further includes a reinforcement belt, which is stacked on the heating strip and connected to the first side wall. The reinforcement belt is arranged in a direction perpendicular to the direction of the heating strip.

[0013] In some embodiments of the present application, an inflation layer is further included. The inflation layer is arranged in the accommodating cavity, stacked on the thermal insulation layer, and located between the thermal insulation layer and the second side wall.

[0014] In some embodiments of the present application, the first connection end is provided with a first connection structure, and the second connection end is provided with a second connection structure, and the first connection structure and the second connection structure can be detachably connected.

[0015] In some embodiments of the present application, the first connection structure and / or the second connection structure are multiple groups.

[0016] In some embodiments of the present application, a sealing cover is further included, and the sealing cover is arranged at one end of the cylindrical structure surrounded by the covering body;

[0017] The tightening structure is arranged on the other end of the covering body away from the sealing cover.

[0018] In some embodiments of the present application, the cover is a circular piece, a cover connecting portion is provided on the periphery of the cover, and a main body connecting portion is correspondingly provided on the covering main body, and the cover connecting portion and the main body connecting portion can be cooperatively connected.

[0019] In some embodiments of the present application, the cover connection portion includes a plurality of sub-connection portions, and gaps are formed between the sub-connection portions.

[0020] Compared to existing technologies, the valve insulation device provided herein comprises a covering body comprising a first sidewall and a second sidewall. A heating layer is disposed within a cavity formed between the first and second sidewalls, the heating layer being in close contact with the first sidewall. When the covering body is wrapped around the outside of a valve, the first sidewall is in close contact with the valve. At this point, the heating layer transfers heat to the valve packing, preventing it from shrinking when exposed to cold, thereby improving the valve's sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 The structure diagram of the valve insulation device is schematically shown;

[0023] Figure 2 The schematic diagram of the layered structure of the package body is shown schematically;

[0024] Figure 3 Schematically shows the arrangement of the reinforcement belt in the heating layer;

[0025] Figure 4 A schematic cross-sectional view of the package body in an unfolded state is shown schematically;

[0026] Figure 5 Schematically shows Figure 4 A schematic diagram of an expanded state with an inflatable layer;

[0027] Figure 6 Schematically shows Figure 5 Schematic cross-section of the enclosed state;

[0028] Figure 7 The figure schematically shows a valve insulation device equipped with a cover.

[0029] Description of Figure Numbers:

[0030] 10. Covering body; 11. First connecting end; 111. First connecting structure; 12. Second connecting end; 121. Second connecting structure; 13. First side wall; 14. Second side wall; 15. Heating layer; 151. Heating strip; 152. Reinforcement strip; 16. Insulation layer; 17. Inflatable layer; 20. Cover; 21. Connecting part; 211. Sub-connecting part; 30. Tightening structure. DETAILED DESCRIPTION

[0031] The exemplary embodiments disclosed herein will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs.

[0033] Valves can be used in low-temperature environments, such as cryogenic valves and cryogenic valves, which are valves whose working temperature is much lower than the ambient temperature. In particular, cryogenic valves can work in an environment close to absolute zero. Cryogenic valves are suitable for handling liquefied gases such as liquefied natural gas, liquid oxygen, liquid nitrogen, etc.

[0034] When the valve is used in a low-temperature environment, such as when it is installed on a storage tank in the liquefied natural gas industry or on an air separation unit, both the storage tank and the air separation unit remain at a low temperature. At this time, the valve is affected by the low temperature, and the sealing packing in the valve stuffing box shrinks when it is cold, and cannot achieve close contact with the valve stem, resulting in the valve's sealing performance being affected, causing fluid leakage.

[0035] To solve the above problems, Figure 1-7 As shown, the first aspect of the present application provides a valve insulation device, which includes a covering body 10.

[0036] The covering body 10 is a flexible member that can be bent. The covering body 10 includes a first connecting end 11 and a second connecting end 12 that are oppositely disposed. The first connecting end 11 and the second connecting end 12 are brought closer together to form the covering body 10 into a cylindrical structure.

[0037] The covering body 10 also includes a first side wall 13, a second side wall 14 and a heating layer 15. The first side wall 13 and the second side wall 14 are spaced apart to form a accommodating cavity. The heating layer 15 is arranged in the accommodating cavity and is arranged in contact with the first side wall 13. The first connecting end 11 and the second connecting end 12 are arranged on the second side wall 14.

[0038] Specifically, the unfolded shape of the covering body 10 can be a rectangle, a square, a diamond or any irregular geometric shape, which is not limited here.

[0039] The covering body 10 has a first connecting end 11 and a second connecting end 12 that are opposite and spaced apart. The first connecting end 11 and the second connecting end 12 are close to or overlapped with each other, so that the covering body 10 can be enclosed into a cylindrical structure.

[0040] When the unfolded shape of the covering body 10 is a rectangle, the first connecting end 11 and the second connecting end 12 can be two opposite long sides or two opposite short sides of the rectangle, which are close to or overlap each other to form a cylindrical wrapping space. After forming a cylindrical structure, it is wrapped around the outside of the valve and corresponds to the filling position inside the valve.

[0041] At the same time, the first connection end 11 is provided with a first connection structure, and the second connection end 12 is provided with a second connection structure. Under the cooperation of the first connection structure and the second connection structure, the first connection end 11 and the second connection end 12 can be fixed, thereby achieving the integrity of the covering body 10.

[0042] The fixing method can be binding and fixing. Furthermore, the first connecting structure includes a first wire bundle, and the second wire bundle corresponding to the second connecting structure cooperates with each other to bind each other. Therefore, under the action of the first wire bundle and the second wire bundle, the distance between the first connecting end 11 and the second connecting end 12 can be gradually reduced until it is eliminated, so that the first connecting end 11 and the second connecting end 12 are kept in close contact, so that the heating layer 15 can fit tightly against the valve and transfer heat to the seasoning. In this way, the overall stability of the covering body 10 can be effectively guaranteed. As a preferred solution, the first wire bundle and the second wire bundle are arranged parallel to each other; and in the actual operation process, the covering body 10 can be cross-wrapped with the first wire bundle and the second wire bundle, and then tied to the second connecting structure and the top of the first connecting structure to complete the bundling and fixing of the first connecting end 11 and the second connecting end 12.

[0043] The fixing method may also be snap-fitting, the first connection structure may also form a first slot, and the second connection structure may also form a second slot.

[0044] Therefore, by plugging the first card slot and the second card slot into each other, the reliability of the fixation between the first connecting end 11 and the second connecting end 12 can be further improved.

[0045] Other fixing methods include: the first connecting structure and the second connecting structure being connected by overlapping Velcro and then bonding; or the first connecting structure and the second connecting structure being connected by snap fasteners and then overlapping and then pressing.

[0046] Furthermore, in some embodiments, the first connection structure and / or the second connection structure are multiple groups.

[0047] Specifically, when the first connecting structure and the second connecting structure are card slots, snaps or Velcro,

[0048] The first connecting structures are arranged in multiple groups and arranged in a sequentially spaced transverse arrangement. The corresponding second connecting structures can be arranged in one or more groups. When the second connecting structures are connected to the first connecting structures at different positions, the inner diameter of the package body can be adjusted to adapt to the volume of the valve, achieving an optimal covering effect.

[0049] The second connection structures can also be arranged in multiple groups and arranged in a sequentially spaced transverse arrangement, and the corresponding first connection structures can be arranged in one or more groups. When the first connection structure is connected to the second connection structures at different positions, the inner diameter of the package body can be adjusted to adapt to the volume of the valve, achieving an optimal covering effect.

[0050] Furthermore, the covering body 10 further includes a first side wall 13, a second side wall 14 and a heating layer 15. The covering body 10 is a sandwich structure having a first side wall 13 and a second side wall 14 spaced apart, and a receiving cavity formed between the first side wall 13 and the second side wall 14.

[0051] Furthermore, the heating layer 15 is disposed within the receiving cavity and is in contact with the first sidewall 13. When the covering body 10 is wrapped around the outside of the valve, the first sidewall 13 is in contact with the valve. At this time, the heating layer 15 heats up and transfers heat to the valve packing, causing it to expand due to the heat, thereby improving the sealing of the valve.

[0052] Furthermore, the heating layer 15 includes a plurality of heating strips 151 . The heating strips 151 are arranged at intervals on the first side wall 13 , and the extending direction of the heating strips 151 is parallel to the axis of the cylindrical structure formed by the covering body 10 .

[0053] The heating layer 15 includes multiple heating strips 151 arranged at equal angular intervals on the first sidewall 13. Because the heating strips 151 are arranged at equal angular intervals, the cladding body 10 is able to bend within the gaps between the heating strips 151, preventing the heating strips 151 from bending. This prevents uneven temperature distribution around the valve body caused by positional variations of the heating strips 151.

[0054] The heating strip 151 is a long strip heating element that can be bent arbitrarily. When the first side wall 13 is bent to wrap around the valve, it can adhere to the first side wall 13 to transfer heat. The heating strip 151 can be a heating cable or a heating tape.

[0055] At this point, the outer wall of the first sidewall 13 is in close contact with the valve, and the inner wall of the first sidewall 13 is fitted with a heating layer 15. The first sidewall 13 serves as a structural layer for arranging and securing the heating layer 15, which can be secured by gluing or sewing. The tubular structure formed by the covering body 10 envelops the portion of the valve where the filler is located, and the heating layer 15 heats and transfers heat to prevent the filler from shrinking when it cools.

[0056] The second side wall 14 is provided with an outlet for the heating strip 151 , and the heating strip 151 passes through the outlet and is connected to a power source for heating.

[0057] Furthermore, in some embodiments, the covering body 10 further includes a heat-insulating layer 16 . The heat-insulating layer 16 is disposed in the accommodating cavity and is stacked on the heating layer 15 , and is located between the heating layer 15 and the second side wall 14 .

[0058] By superimposing the insulating layer 16 on the heating layer 15, the heat is locked in the insulating layer 16, preventing heat from overflowing, achieving a better heating effect on the valve packing, and thus reducing energy loss. The insulating layer 16 can be made of aluminum silicate material, or a glass wool layer with aluminum foil on the outside, which has both thermal insulation and fire protection functions.

[0059] Furthermore, in some embodiments, the heating layer 15 also includes a reinforcement belt 152 , which is stacked on the heating strip 151 and connected to the first side wall 13 , and the setting direction of the reinforcement belt 152 is perpendicular to the setting direction of the heating strip 151 .

[0060] The reinforcing strip 152 may be an adhesive tape that secures the heating strip 151 to the first side wall 13. The reinforcing strip 152 may also be sutured to the inner wall of the first side wall 13, with the suture points located at the gap between the heating strips 151 and 151, thereby increasing the firmness of the heating strip 151.

[0061] Furthermore, in some embodiments, the covering body 10 further includes an air-filled layer 17 . The air-filled layer 17 is disposed in the accommodating cavity and is stacked on the thermal insulation layer 16 , and is located between the thermal insulation layer 16 and the second side wall 14 .

[0062] Specifically, the inflatable layer 17 expands in volume after being inflated. When the covering body 10 is wrapped around the outside of the valve, the inflatable layer 17 expands and squeezes the insulation layer 16 and the heating layer 15, making the heating layer 15 more closely attached to the outside of the valve, improving heat transfer. This also causes the valve packing to expand due to the heat, thereby improving the sealing of the valve.

[0063] The inflatable layer 17 can be understood as an inflatable airbag, and its material can be silicone, EVA, nylon, TPU, polyvinyl chloride, etc. There is an air hole (not shown in the drawings) on the second side wall 14, and the air hole is connected to the inflatable airbag. The inflatable layer 17 can be inflated or deflated through the air hole.

[0064] Furthermore, in some embodiments, the heat preservation device is also provided with a cover 20 and a tightening structure 30; the cover 20 is arranged at one end of the cylindrical structure surrounded by the covering body 10; the tightening structure 30 is arranged on the other end of the covering body 10 away from the cover 20.

[0065] Specifically, in a low-temperature operating environment, the valve body's surface temperature is low. When exposed to the outside air, moisture in the air freezes, hindering the rotation of the valve stem. This requires de-icing when turning the valve stem, which is time-consuming and laborious. Therefore, a cover 20 is provided at one end of the covering body 10, and a tightening structure 30 is provided at the other end.

[0066] Among them, the cover 20 is a circular part, and an insulation layer 16 is also provided inside the cover 20. A cover 20 connecting part 21 is provided on the periphery of the cover 20, and a main body connecting part 21 is correspondingly provided on the covering main body 10. The cover 20 connecting part 21 and the main body connecting part 21 can be matched and connected.

[0067] The connection portion 21 of the cover 20 and the connection portion 21 of the main body can be corresponding Velcro or snaps. By fitting or pressing, the cover 20 is connected to the package body. The cover 20 is used to wrap one end of the valve, preventing it from contacting the outside air, thereby improving the thermal insulation effect. At the other end, the contraction of the tightening structure 30 ensures that the other end of the package body 10 is in airtight contact with the valve, preventing heat loss from the heating layer 15 and improving the thermal insulation effect.

[0068] The tightening structure 30 may be an elastic band or a drawstring, with both ends of the drawstring passing through the covering body 10 respectively. When the covering body 10 is enclosed into a cylindrical member, the two ends of the drawstring are tied together to achieve a tightening effect.

[0069] Furthermore, in some embodiments, the connection portion 21 of the cover 20 includes a plurality of sub-connection portions 211, with gaps between the sub-connection portions 211. Specifically, the connection portion 21 of the cover 20 is divided into a plurality of sub-connection portions 211, and each sub-connection portion 211 is provided with a snap button or Velcro that cooperates with the snap button or Velcro of the main body connection portion 21.

[0070] Considering that most of the existing work sites are open-air environments, the first side wall 13 and the second side wall 14 are made of silicone cloth, which has heat insulation, fire prevention and insulation functions and can meet the use requirements of open-air environments.

[0071] It should be noted that, in the description of this specification, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application; the terms "connect", "install", "fixed", etc. should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0072] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above 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.

[0073] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A valve insulation device, characterized in that: include: The covering body is a flexible member that can be bent. The covering body includes a first connecting end and a second connecting end that are oppositely arranged. The first connecting end and the second connecting end are brought closer together to form a cylindrical structure. The covering body also includes a first side wall, a second side wall and a heating layer. The first side wall and the second side wall are spaced apart to form a accommodating cavity. The heating layer is arranged in the accommodating cavity and is attached to the first side wall. The first connecting end and the second connecting end are arranged on the second side wall.

2. The valve insulation device according to claim 1, characterized in that: The covering body further comprises: The heat-insulating layer is arranged in the accommodating cavity, stacked on the heating layer, and located between the heating layer and the second side wall.

3. The valve insulation device according to claim 2, characterized in that: The heating layer includes a plurality of heating strips, which are arranged at intervals on the first side wall, and the extending direction of the heating strips is parallel to the axis of the cylindrical structure surrounded by the covering body.

4. The valve insulation device according to claim 3, characterized in that: The heating layer further includes a reinforcement belt, which is stacked on the heating belt-shaped member and connected to the first side wall. The arrangement direction of the reinforcement belt is perpendicular to the arrangement direction of the heating belt-shaped member.

5. The valve insulation device according to claim 2, characterized in that: The covering body further comprises: An air-filled layer is arranged in the accommodating cavity, stacked on the heat-insulating layer, and located between the heat-insulating layer and the second side wall.

6. The valve insulation device according to claim 1, characterized in that: The first connecting end is provided with a first connecting structure, and the second connecting end is provided with a second connecting structure. The first connecting structure and the second connecting structure can be detachably connected.

7. The valve insulation device according to claim 6, characterized in that: The first connection structure and / or the second connection structure are in multiple groups.

8. The valve insulation device according to claim 1, characterized in that: Also includes: A sealing cover, the sealing cover being arranged at one end of the cylindrical structure formed by the covering body; A tightening structure is provided on the other end of the covering body away from the sealing cover.

9. The valve insulation device according to claim 8, characterized in that: The cover is a circular piece, and a cover connecting portion is provided on the circumference of the cover. The covering body is correspondingly provided with a body connecting portion, and the cover connecting portion and the body connecting portion can be matched and connected.

10. The valve insulation device according to claim 9, characterized in that: The cover connection portion includes a plurality of sub-connection portions, and gaps are formed between the sub-connection portions.

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