Heat insulation and cold insulation pipe bracket capable of monitoring vacuum degree

Abstract

The utility model discloses a heat insulation and cold insulation pipe support capable of monitoring vacuum degree, the pipe support mainly comprises a vacuum cavity and a pipe clamp, the vacuum cavity is divided into an upper vacuum cavity and a lower vacuum cavity, and the upper vacuum cavity and the lower vacuum cavity are respectively provided with a vacuum degree monitoring instrument for monitoring the vacuum degree of the vacuum cavity. Heat insulation rib plates are arranged in the vacuum cavity so as to guarantee the structural strength and the bearing capacity of the vacuum cavity, and the number of the heat insulation rib plates is determined according to strength calculation. The heat conductivity coefficient of the vacuum heat insulation layer is small, and the overall cooling capacity loss of the pipe bracket is small; the heat insulation layer is small in thickness, small in installation space and convenient to install and overhaul.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of petrochemical industry relates to a kind of vacuum heat insulation cold insulation pipe support, specifically, it relates to a kind of heat insulation cold insulation pipe support of vacuum degree monitoring. BACKGROUND

[0002] In petrochemical industry, the pipeline for conveying or storing low-temperature medium, such as LNG, liquid nitrogen, propylene, ethylene, etc., usually needs to be supported by heat insulation cold insulation pipe support to avoid loss of cold energy and failure of the supporting structure due to low temperature. The cold insulation pipe shell of conventional low-temperature pipe support is generally made of polyurethane (PUF), polyisocyanurate (PIR) and foam glass (CG) and other materials. The thermal conductivity of polyurethane is generally 0.02-0.03 W / (m·K), and the thermal conductivity of other conventional cold insulation materials is similar or larger. As a result, a relatively thick heat insulation layer is required. For example, when the cold insulation temperature is -196℃, the thickness of the heat insulation layer for a DN900 pipeline is about 250mm, which requires a large installation space for the pipe support, posing a design problem. The temperature to be maintained is usually proposed by the design institute, and the thickness of the cold insulation layer and the loss of cold energy are calculated by the manufacturer, resulting in inconsistent thickness of the cold insulation layer among different manufacturers, which brings many problems to site construction and procurement. SUMMARY

[0003] To solve the technical problems of large installation space requirement, complicated installation and construction process and large cold energy loss of the low-temperature pipe support in the prior art, the utility model provides a heat insulation cold insulation pipe support capable of monitoring vacuum degree.

[0004] The utility model provides a kind of heat insulation cold insulation pipe support capable of monitoring vacuum degree, and the pipe support mainly includes vacuum cavity and pipe clamp, the vacuum cavity is divided into upper vacuum cavity, lower vacuum cavity, vacuum degree monitoring instrument is respectively arranged on the upper vacuum cavity, lower vacuum cavity, to monitor the vacuum degree of vacuum cavity, heat insulation rib plate is arranged in the vacuum cavity, to ensure the structural strength and bearing capacity of vacuum cavity, the number of heat insulation rib plate is determined according to strength calculation.

[0005] The heat insulation rib plate should not affect the connectivity of the internal space of the cavity. When the number of heat insulation rib plates is large, a labyrinth structure is generally used.

[0006] The vacuum degree monitoring instrument is a vacuum degree monitoring instrument with a vacuum connection. When the pipeline is installed horizontally, the vacuum degree monitoring instrument faces an upward diagonal direction. The vacuum degree monitoring instrument can be a local instrument or a remote instrument to prevent the heat insulation performance from being reduced due to a decrease in vacuum degree.

[0007] Low-temperature resistant flexible material gaskets are arranged between the upper and lower vacuum cavities and the supported pipeline to eliminate the fitting problems caused by manufacturing errors.

[0008] The pipe clamp is divided into an upper pipe clamp and a lower pipe clamp, the two ends of the upper pipe clamp and the lower pipe clamp are connected by bolts and nuts, the nuts are provided with spring washers, and the upper pipe clamp and the lower pipe clamp are clamped on the vacuum cavity by adjusting the bolts and the nuts.

[0009] Low-temperature-resistant flexible material gaskets are arranged at the butt joints of the upper vacuum cavity and the lower vacuum cavity, the low-temperature-resistant flexible material gaskets can compensate for the gap caused by the different shrinkage amounts of the pipeline and the vacuum cavity at low temperature, prevent water vapor from entering the gap between the outer wall of the pipeline and the vacuum cavity, and reduce the cold loss.

[0010] The pipe support capable of monitoring vacuum degree further comprises a saddle mounted on the lower part of the pipe clamp to support the pipe support, and the pipe clamp and the saddle are connected by welding.

[0011] The pipe support capable of monitoring vacuum degree further comprises a saddle mounted on the lower part of the pipe clamp to support the pipe support, and the pipe clamp and the saddle are connected by welding.

[0012] 1) Compared with the traditional heat conduction coefficient of the heat insulation material, the heat conduction coefficient of the vacuum heat insulation mode is greatly reduced, and the vacuum heat insulation heat conduction coefficient can reach 10e-5 to 10e-2 W / (m·K);

[0013] 2) The vacuum insulation requires a smaller thickness of the heat insulation layer, has a small installation space and low cost; according to calculation, when the cold-keeping temperature is-196 DEG C, the vacuum insulation layer thickness of the DN100 pipeline is 50mm, and the heat insulation effect of the 140mm heat insulation layer of the traditional mode can be achieved; for a low-temperature large-diameter pipeline, the advantage is more obvious; the price of the DN900 pipeline cold pipe support in the traditional mode is about 20,000 yuan / set, and when the utility model is used, the estimated price is only 70% of that, and a large amount of cost can be saved for the project;

[0014] 3) The vacuum heat insulation cavity is arranged in an upper-lower split type, the upper and lower cavity structures are the same and can be replaced with each other, and installation and maintenance are convenient;

[0015] 4) The vacuum cavity is provided with a vacuum degree monitoring instrument and a vacuumizing joint, vacuum degree monitoring can be performed, and when the vacuum degree is insufficient, the vacuum degree can be maintained by re-vacuumizing through the joint;

[0016] 5) Compared with the traditional cold-keeping material, the vacuum heat insulation cavity is a closed structure and will not cause performance degradation due to moisture absorption, and a moisture-proof layer can not be arranged, and the vacuum heat insulation cavity is more suitable for coastal and rainy areas. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the figure: 1-upper vacuum cavity, 2-lower vacuum cavity, 3-low-temperature high-elasticity sealing material, 4-heat-insulating rib plate, 5-low-temperature flexible material gasket, 6-upper pipe clamp, 7-lower pipe clamp, 8-bolt, 9-nut, 10-saddle, 11-vacuum degree monitoring instrument. DETAILED DESCRIPTION

[0019] The utility model is further described below in combination with the drawings.

[0020] The vacuum heat-insulating pipe support provided by the utility model mainly comprises an upper vacuum cavity 1, a lower vacuum cavity 2, a low-temperature high-elasticity sealing material 3, a heat-insulating rib plate 4, a low-temperature flexible material gasket 5, an upper pipe clamp 6, a lower pipe clamp 7, a bolt 8, a nut 9, a saddle 10 and a vacuum degree monitoring instrument 11. The upper vacuum cavity 1 and the lower vacuum cavity 2 constitute a heat-insulating layer, the upper and lower cavity structures are the same, and when horizontal pipelines are installed, the vacuum degree monitoring instrument 11 is directed in an obliquely upward direction. The gap when the upper vacuum cavity 1 and the lower vacuum cavity 2 are abutted and installed is sealed by the low-temperature high-elasticity sealing material 3, the gap problem caused by the different shrinkage amounts of the pipeline and the vacuum cavity at low temperature can be compensated, water vapor is prevented from entering the gap between the outer wall of the pipeline and the vacuum cavity, and cold loss is reduced. The heat-insulating rib plate 4 is arranged in the vacuum cavity and is used to improve the structural strength of the cavity, the number of the heat-insulating rib plate 4 is determined according to strength calculation, and the heat-insulating rib plate 4 should not affect the connectivity of the internal space of the cavity. When the number is relatively large, a labyrinth structure is generally adopted. The low-temperature flexible material gasket 5 is arranged between the upper vacuum cavity 1 and the lower vacuum cavity 2 and the pipeline to be supported, so as to eliminate the fitting problem caused by manufacturing errors. The upper pipe clamp 6, the lower pipe clamp 7, the bolt 8, the nut 9 and the saddle 10 are installed outside the vacuum cavity, the upper pipe clamp 6 and the lower pipe clamp 7 are clamped to the upper vacuum cavity 1 and the lower vacuum cavity 2 by adjusting the bolt 8 and the nut 9, and the lower pipe clamp 7 and the saddle 10 are connected by welding. The upper vacuum cavity 1 and the lower vacuum cavity 2 are respectively provided with a vacuum degree monitoring instrument 11 with a vacuumizing joint, which can be an on-site instrument or an online instrument with interlocking alarm. The higher the vacuum degree, the lower the heat conductivity coefficient, and the vacuum degree monitoring instrument 11 is used to monitor the vacuum degree and prevent the heat-insulating performance from being reduced due to the decrease of the vacuum degree. When the vacuum degree is insufficient, the vacuum degree monitoring instrument 11 is used to connect a vacuumizing device to improve the vacuum degree.

[0021] The traditional cold insulation pipe support is generally composed of a cold insulation pipe shell, a moisture-proof layer, an outer protective layer and an outer pipe clamp support, and the installation and construction process is relatively complex. Firstly, the lower cold insulation pipe shell is installed layer by layer, and the pipe shells of each layer are bonded together in staggered joints, and any small damage and error needs to be repaired. Secondly, low-temperature elastic glue is applied to the axial edge joints of each layer, and the inner layer and the outer layer of the upper cold insulation pipe shell are installed in turn. Then, the moisture-proof layer is constructed, the overlapping part of the moisture-proof layer is bonded with glue or adhesive tape, and the axial joint needs to be sealed with glass steel or composite aluminum foil. Finally, the outer protective layer and the outer pipe clamp support are installed. The utility model has the advantages of simple structure, convenient installation, vacuum cavity butt joint installation on the outer wall of the pipeline, filling the butt joint gap with low-temperature high-elasticity sealing material, and installing the pipe clamp support outside.

[0022] The vacuum insulation layer has small thermal conductivity, and the overall cold loss of the pipe support is small. The thickness of the insulation layer is small, the installation space is small, and the installation and maintenance are convenient. The vacuum insulation cavity is provided with a vacuum degree monitoring instrument and a vacuumizing connector, so that the vacuum degree monitoring and vacuumizing operation for maintaining the vacuum degree are facilitated, and the pipe support is a high-quality pipe support for low-temperature pipelines, and is particularly suitable for large-diameter low-temperature pipelines.

[0023] The above is only a typical embodiment of the utility model, and does not limit the utility model in any form, and any skilled person in the art can make changes or modifications to the above content without departing from the technical scheme of the utility model, and the equivalent examples of equivalent changes should be regarded as equivalent examples. Any equivalent change made to the above embodiment according to the technical essence of the utility model without departing from the technical scheme of the utility model belongs to the scope of the technical scheme of the utility model.

Claims

1. An adiabatic pipe support which can monitor vacuum degree, characterized by: The pipe support mainly comprises a vacuum cavity and a pipe clamp, the vacuum cavity is divided into an upper vacuum cavity and a lower vacuum cavity, vacuum degree monitoring instruments are arranged on the upper vacuum cavity and the lower vacuum cavity respectively to monitor the vacuum degree of the vacuum cavity, and heat insulation rib plates are arranged in the vacuum cavity to ensure the structural strength and bearing capacity of the vacuum cavity, and the number of the heat insulation rib plates is determined according to strength calculation.

2. The thermally insulated pipe support with monitorable vacuum according to claim 1, characterized in that: The heat insulation rib plates should not affect the connectivity of the internal space of the cavity, and when the number of the heat insulation rib plates is large, a labyrinth structure is adopted.

3. The thermally insulated pipe support with monitorable vacuum according to claim 1, characterized in that: The vacuum degree monitoring instrument is a vacuum degree monitoring instrument with a vacuum joint, the vacuum degree monitoring instrument faces an obliquely upward direction when the pipeline is installed horizontally, and the vacuum degree monitoring instrument is an on-site instrument or a remote instrument.

4. The thermally insulated pipe support with monitorable vacuum according to claim 1, characterized in that: Low-temperature-resistant flexible material gaskets are arranged between the upper vacuum cavity, the lower vacuum cavity and the supported pipeline.

5. The thermally insulated pipe support with monitorable vacuum according to claim 1, characterized in that: The pipe clamp is divided into an upper pipe clamp and a lower pipe clamp, the upper pipe clamp and the lower pipe clamp are connected by bolts and nuts at two ends, the nuts are provided with spring gaskets, and the upper pipe clamp and the lower pipe clamp are clamped on the vacuum cavity by adjusting the bolts and the nuts.

6. The thermally insulated pipe support with monitorable vacuum according to claim 1, characterized in that: Low-temperature-resistant flexible material gaskets are arranged at the butt joints of the upper vacuum cavity and the lower vacuum cavity.

7. The thermally insulated pipe support with monitorable vacuum according to claim 5, characterized in that: The pipe support further comprises a saddle installed at the lower part of the pipe clamp to support the pipe support, and the lower pipe clamp is connected to the saddle by welding.

Images