Low-temperature valve pipeline cold insulation device
By designing a low-temperature valve pipe cooling device that includes high-density fiberglass cloth, airtight telescopic sleeve, valve ring and fill pipe, the problems of cooling loss and condensation frost in LNG pipeline cooling technology are solved, and better cooling effect and equipment safety are achieved.
Patent Information
- Application Number
- CN202421758554.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The existing LNG pipeline cooling technology has problems such as cooling loss, frost and freezing of cold box panels, which affect energy utilization efficiency and may lead to equipment damage and safety hazards.
A low-temperature valve pipe cooling device is designed, including high-density fiberglass cloth, airtight telescopic sleeves, valve rings and filler pipes, which reduce cooling loss through these components and prevent condensation and frost formation.
It effectively avoids the problem of cooling in low-temperature medium circulation pipelines, provides deformation margin for thermal expansion and contraction, reduces the formation of condensation and frost, and improves the cooling effect.
Smart Images
Figure CN222880466U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cold box pipelines, and in particular relates to a low-temperature valve pipeline cold preservation device. Background Art
[0002] As an efficient and clean energy source, liquefied natural gas (LNG) is increasingly widely used in China. In the process of transporting liquefied natural gas, LNG cold boxes and air separation equipment cold boxes often suffer from cold loss, frost on the cold box panels, and cracking due to the cold box wall pipe structure. These problems not only affect the effective use of energy, but also may cause equipment damage and safety hazards.
[0003] At present, the commonly used LNG pipeline cold preservation technologies include stacking insulation and vacuum insulation. The stacking insulation method lays insulation materials on the outside of the pipeline to reduce cold loss, but it takes up a large space and has a slightly poor cold preservation effect. Vacuum insulation reduces heat transfer through sealed interlayers and vacuum structures, and has a better cold preservation effect, but the construction cost is high. Therefore, it is urgent to design a valve low-temperature pipeline cold preservation device that can solve the existing problems. Utility Model Content
[0004] The utility model aims to solve the deficiencies of the prior art and provide a low-temperature valve pipeline cold preservation device.
[0005] The specific technical solutions adopted by this utility model are as follows:
[0006] The utility model provides a low-temperature valve pipeline cold preservation device, which is arranged on the valve pipeline, and the valve pipeline sleeve is arranged outside the low-temperature medium circulation pipeline in the cold box; the cold preservation device comprises a connecting plate, a valve head ring plate, a high-density glass fiber cloth, an airtight telescopic sleeve, a valve ring and a filling pipeline; wherein the valve head ring plate, the high-density glass fiber cloth and the valve ring are all arranged on the periphery of the low-temperature medium circulation pipeline;
[0007] A pipe clamp is fixed to the periphery of the valve pipeline; one end of the connecting plate is fixedly connected to the pipe clamp, and the other end is fixedly connected to the valve head ring plate; a high-density glass fiber cloth is arranged between the valve head ring plate and the valve ring; a filling pipe for filling pearlescent sand is arranged on the valve ring; one end of the filling pipe is connected to the valve ring, and the other end is connected to the pearlescent sand filling port opened on the cold box panel; a steel plate is arranged at the pearlescent sand filling port on the cold box panel, and the steel plate is fixed to the cold box panel through a fixing piece;
[0008] An airtight telescopic sleeve is arranged on one side of the valve ring outside the cold box, and the valve ring is in airtight connection with the valve head cover through the airtight telescopic sleeve.
[0009] Preferably, the pipe clamp is fixed to the periphery of the valve pipe by bolt connection and then further fixed by spot welding.
[0010] Preferably, the connecting plate is made of steel plate.
[0011] Preferably, the filling pipe is formed into a whole by welding a steel pipe and an elbow.
[0012] Preferably, a sealing gasket is provided between the steel plate and the cold box panel.
[0013] Preferably, the fixing member is a bolt and a matching nut.
[0014] Preferably, the airtight telescopic sleeve and the valve ring are fastened with a clamp, and the connection is sealed with silicone.
[0015] Preferably, the valve ring is made of polyurethane foam or rubber material.
[0016] Preferably, the valve ring is welded to the cold box panel at an angle downward to prevent the liquid in the valve stem from flowing out.
[0017] Furthermore, the angle between the valve ring and the horizontal direction is 15° to 20°.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model provides a low-temperature valve pipeline cold preservation device, wherein the valve pipeline sleeve is arranged outside the low-temperature medium circulation pipeline in the cold box. The high-density glass fiber cloth in the cold preservation device and the pearlescent sand filled in the valve ring can well avoid the problem of cold leakage of the low-temperature medium circulation pipeline; in addition, the airtight expansion sleeve in the cold preservation device provides a certain deformation margin for the thermal expansion and contraction of the low-temperature pipeline. The low-temperature valve pipeline cold preservation device provided by the utility model has a simple structure, can reduce the formation of condensation and frost, and has a good cold preservation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic diagram of a low-temperature valve pipeline cold preservation device provided in this embodiment;
[0021] Figure 2 for Figure 1 Schematic diagram of the middle B direction;
[0022] Figure 3 This is a schematic diagram of the connection between the filling pipe and the cold box panel in this embodiment;
[0023] In the figure: pipe clamp 1, connecting plate 2, valve head ring plate 3, high-density glass fiber cloth 4, airtight expansion sleeve 5, valve ring 6, filling pipe 7, steel plate 8, sealing gasket 9, fixing part 10, valve pipe 11. DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The technical features in each embodiment of the utility model can be combined accordingly without conflicting with each other.
[0025] like Figure 1 As shown, as a preferred embodiment of the present invention, this embodiment provides a low-temperature valve pipeline cold preservation device. The cold preservation device is arranged on the valve pipeline 11, and the valve pipeline 11 is sleeved on the low-temperature medium circulation pipeline in the cold box.
[0026] The cold preservation device provided by the utility model comprises a connecting plate 2, a valve head ring plate 3, a high-density glass fiber cloth 4, an airtight telescopic sleeve 5, a valve ring 6 and a filling pipeline 7.
[0027] like Figure 2 As shown, a pipe clamp 1 is fixed to the periphery of the valve pipeline 11. The pipe clamp 1 is fixed to the periphery of the valve pipeline 11 by bolt connection, and then further fixed to the periphery of the valve pipeline 11 by spot welding. The valve head ring plate 3 is fixed to the valve body. One end of the connecting plate 2 is fixedly connected to the pipe clamp 1, and the other end is fixedly connected to the valve head ring plate 3. In this embodiment, the connecting plate 2 is made of steel plate, and the two ends of the connecting plate 2 are fixedly connected to the pipe clamp 1 and the valve head ring plate 3 by welding.
[0028] In the device provided by the utility model, a high-density glass fiber cloth 4 is arranged between the valve head ring plate 3 and the valve ring 6. The high-density glass fiber cloth is a fabric made of glass fiber, which has high tensile strength and deformation resistance, and the material has low thermal conductivity, which can effectively reduce the loss of cold and maintain a low temperature environment in the valve and pipeline.
[0029] In the device provided by the utility model, a filling pipe 7 for filling pearl sand is provided on the valve ring 6. Pearl sand is a light, porous material with good thermal insulation performance. Specifically, the low thermal conductivity of pearl sand can effectively reduce the loss of cold through valves and pipes, thereby improving the energy efficiency of the system; pearl sand can also prevent condensation and frost from forming on the surface of valves and pipes due to temperature differences, protecting the normal operation of the equipment. In a low-temperature environment, pearl sand can also absorb and isolate low-temperature liquids that may leak, preventing them from spreading and causing damage to the equipment.
[0030] In this embodiment, the filling pipe 7 is welded into a whole by a steel pipe and an elbow. One end of the filling pipe 7 is connected to the valve ring 6, and the other end is connected to the pearl sand filling port opened on the cold box panel; a steel plate 8 is set at the pearl sand filling port on the cold box panel, and the steel plate 8 is fixed to the cold box panel by bolt connection. In order to ensure airtightness, a sealing gasket 9 is also provided between the steel plate 8 and the cold box panel. Figure 3 shown.
[0031] In the device provided by the utility model, an airtight telescopic sleeve 5 is arranged on one side of the valve ring 6 outside the cold box. The airtight telescopic sleeve 5 is fixed to the outside of the valve ring 6 by means of a clamp, and a silicone seal is used at the connection, so that the valve ring 6 forms a closed connection with the valve head cover through the airtight telescopic sleeve 5. The airtight telescopic sleeve provides a certain deformation margin for the thermal expansion and contraction of the cryogenic pipeline.
[0032] The valve ring is a key component used to protect valves and pipes in low temperature environments. The main function of the valve ring is to prevent cold loss and reduce the formation of condensation and frost, thereby ensuring efficient operation of the system and extending the service life of the equipment. The valve ring is usually made of a material with good thermal insulation performance. In the utility model, the valve ring 6 is made of polyurethane foam, rubber or other thermal insulation materials. Those skilled in the art can select a suitable valve ring material according to actual working conditions.
[0033] In order to prevent the liquid in the valve stem from flowing out, the valve ring 6 in this embodiment is welded to the cold box panel at an angle downward, and the angle between the valve ring 6 and the horizontal direction is 15°. It should be noted that the angle of inclination can be between 15° and 20°.
[0034] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.
Claims
1. A low-temperature valve pipeline cold preservation device, characterized in that: The cold preservation device is arranged on a valve pipeline (11), and the valve pipeline (11) is sleeved outside a low-temperature medium circulation pipeline in a cold box; the cold preservation device comprises a connecting plate (2), a valve head ring plate (3), a high-density glass fiber cloth (4), an airtight telescopic sleeve (5), a valve ring (6) and a filling pipeline (7); wherein the valve head ring plate (3), the high-density glass fiber cloth (4) and the valve ring (6) are all arranged on the periphery of the low-temperature medium circulation pipeline; A pipe clamp (1) is fixed to the periphery of the valve pipe (11); one end of the connecting plate (2) is fixedly connected to the pipe clamp (1), and the other end is fixedly connected to the valve head ring plate (3); a high-density glass fiber cloth (4) is arranged between the valve head ring plate (3) and the valve ring (6); a filling pipe (7) for filling pearlescent sand is arranged on the valve ring (6); one end of the filling pipe (7) is connected to the valve ring (6), and the other end is connected to the pearlescent sand filling port opened on the cold box panel; a steel plate (8) is arranged at the pearlescent sand filling port on the cold box panel, and the steel plate (8) is fixed to the cold box panel through a fixing member (10); An airtight telescopic sleeve (5) is arranged on one side of the valve ring (6) outside the cold box, and the valve ring (6) is in airtight connection with the valve head cover via the airtight telescopic sleeve (5).
2. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The pipe clamp (1) is fixed to the periphery of the valve pipe (11) by bolt connection and then further fixed by spot welding.
3. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The connecting plate (2) is made of steel plate.
4. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The filling pipe (7) is formed into an integral body by welding a steel pipe and an elbow.
5. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: A sealing gasket (9) is also provided between the steel plate (8) and the cold box panel.
6. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The fixing member (10) is a bolt and a matching nut.
7. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The airtight telescopic sleeve (5) and the valve ring (6) are fastened with a clamp, and the connection is sealed with silicone.
8. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The valve ring (6) is made of polyurethane foam or rubber material.
9. The low-temperature valve pipeline cold preservation device according to claim 1, characterized in that: The valve ring (6) is welded to the cold box panel at an angle downward to prevent the liquid in the valve stem from flowing out.
10. The low-temperature valve pipeline cold preservation device according to claim 9, characterized in that: The angle between the valve ring (6) and the horizontal direction is 15° to 20°.