Double-wall pipeline filtering and ventilating device

Abstract

According to the double-wall pipeline filtering and ventilating device, a filter element shell is suspended in a ventilating shell, double-wall pipes which are mutually suspended and nested are arranged at the two ends of the filter element shell and the two ends of the ventilating shell, outer pipes of the double-wall pipes are ventilating pipes, ventilating flanges are arranged at the ends of the ventilating pipes, and inner circles of the ventilating flanges are communicated with inner pipes at the two ends of the filter element shell; ventilation holes arranged in the circumferential direction are formed in the flange wall between the inner pipe and the outer pipe. And a bracket is arranged between the outer lower end of the filter element shell and the inner lower end of the ventilation shell. Therefore, the filtering and ventilating functions of the double-wall pipeline are achieved, the double-wall pipeline can be used for a double-wall pipeline in an LNG fuel engine test workshop, a double-wall pipeline in a methanol fuel engine test workshop and a double-wall pipeline in a future ammonia fuel engine test workshop, and the application prospect is wide.

Description

Technical Field

[0001] The present invention relates to installing a filter device on a double-walled pipeline without affecting the ventilation function between the inner and outer pipes of the double-walled pipeline. The filter device can filter the medium inside the inner pipe of the double-walled pipeline without affecting the ventilation between the inner and outer pipes of the double-walled pipeline, thereby purifying the transmission medium and protecting key components. Background Art

[0002] In order to actively implement the national goal of "carbon peak and carbon neutrality", the shipping industry is facing transformation and upgrading. As a marine low-speed engine manufacturing enterprise, our company has also continued to advance the development of low-carbon and zero-carbon engines and new fuel supply systems. In order to meet the company's manufacturing of the first domestic methanol dual-fuel marine low-speed engine, the company built a methanol supply system in the early stage. In order to ensure the safety of methanol fuel supply in the methanol supply system, all methanol supply pipelines in the general assembly test workshop adopt double-wall pipelines, and ventilation devices and methanol leakage detection devices are added between the inner and outer pipes of the double-wall pipes. In order to ensure the cleanliness of the methanol entering the engine and protect important components such as the methanol injection valve of the methanol dual-fuel main engine, it is necessary to set a filtering device on the double-wall pipeline at the terminal of the methanol supply system without affecting the ventilation function of the double-wall pipeline. Summary of the invention

[0003] The present invention designs and manufactures a double-wall pipeline filtering and ventilation device with simple structure and convenient use, aiming at the use condition that the medium in the inner tube of the double-wall pipeline needs to be filtered and the inner and outer tubes need to be ventilated.

[0004] The technical solution of the present invention is:

[0005] The double-wall pipeline filtering and ventilation device comprises a filter element housing, a filter element in the filter element housing, and a ventilation housing, wherein the filter element housing is suspended in the ventilation housing, and the filter element housing and the ventilation housing have mutually suspended and nested double-walled tubes at both ends, the outer tube of the double-arm tube is a ventilation tube, and the ventilation tube end is provided with a ventilation flange, the inner circle of the ventilation flange is connected with the inner tube at both ends of the filter element housing, and the flange wall between the inner tube and the outer tube is provided with ventilation holes arranged along the circumferential direction. A bracket is provided between the outer lower end of the filter element housing and the inner lower end of the ventilation housing. Further, the upper end of the filter element housing and the upper end of the ventilation housing are provided with a shell cover, and the respective shell covers are respectively connected to the upper end of the filter element housing and the upper end of the ventilation housing by screw sealing. The medium in the double-walled tube inner tube pipeline is filtered by the filter element, the ventilation housing is connected to the outer tube of the double-walled tube, the filter housing is connected to the inner tube of the double-walled tube, a ventilation space is formed between the outer side of the filter element housing and the inner side of the ventilation housing, and the double-walled pipeline filtering and ventilation device is connected and installed on the conveying double-walled pipeline through the ventilation flange with ventilation holes and the ventilation flange docked with the conveying double-walled pipeline. The double-wall pipeline filtering and ventilation device is composed of a filter element housing, a filter element, a ventilation housing, a double-wall pipe ventilation flange, etc. The filter element housing is connected to the inner tube of the double-wall pipe, and the medium in the inner tube of the double-wall pipe is filtered through the filter element. The ventilation housing is connected to the outer tube of the double-wall pipe, and a ventilation space is formed between the outer side of the filter element housing and the inner side of the ventilation housing. The double-wall pipeline filtering and ventilation device is installed on the double-wall pipeline through a flange with ventilation holes, thereby realizing the dual functions of ventilation and filtration on the double-wall pipeline, achieving the purpose of filtering the pipeline medium without affecting ventilation, thereby protecting the important components at the user end. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 :Double-wall pipeline filter ventilation device operating condition diagram

[0007] Figure 2 :Design principle diagram of double-wall pipeline filter ventilation device DETAILED DESCRIPTION

[0008] The design of the present invention is further described below in conjunction with the accompanying drawings.

[0009] like Figure 1As shown, taking the methanol delivery pipeline as an example, in order to ensure the safety of methanol medium delivery of the main engine of the methanol dual-fuel engine 6, the medium delivery pipeline in the workshop adopts a double-wall pipeline 1, and is equipped with a ventilation discharge pipeline 3 and a ventilation fan 31 leakage detection sensor 32. In this way, when the inner pipe methanol medium leaks, the methanol medium will not leak directly to the test workshop, but will leak between the inner and outer pipes of the double-wall pipe, and will be brought to the leakage sensor by the air circulating between the inner and outer pipes, so that the sensor sends an alarm signal to warn the operator to take emergency measures, thereby ensuring the safety of methanol fuel delivery. Because the methanol delivery pipeline is long and there is a risk of impurities in the input of raw materials, it is necessary to set a filtering device before the use terminal to ensure that important components are not damaged by impurities. This requires a filtering device to be set on the double-wall pipeline before the use terminal, and the filtering device also needs to have a ventilation function. The present invention is a double-wall pipeline filtering and ventilation device 4 specially designed to solve the above problems. As shown in the figure, the double-wall pipeline filtering and ventilation device has a filter element housing 40, a filter element 41 in the filter element housing, and a ventilation housing 45. The filter element housing is suspended in the ventilation housing to form an air circulation cavity 51. There are double-walled tubes 42 suspended and nested in each other at both ends of the filter element housing and the ventilation housing. The outer tube 422 of the double-arm tube is a ventilation tube. The end of the ventilation tube is provided with a ventilation flange 44. The inner circle of the ventilation flange is connected to the inner tube 421 at both ends of the filter element housing. The flange wall between the inner tube and the outer tube is provided with ventilation holes 444 arranged along the circumferential direction to form a ventilation channel 11. A bracket 43 is provided between the outer lower end of the filter element housing and the inner lower end of the ventilation housing. The upper end of the filter element housing and the upper end of the ventilation housing are provided with shell covers 401 and 451, and the respective shell covers are respectively connected to the upper end of the filter element housing and the upper end of the ventilation housing by screw sealing. The medium in the inner tube pipeline of the double-walled tube is filtered through the filter element, the ventilation housing is connected to the outer tube of the double-walled tube, and the filter housing is connected to the inner tube of the double-walled tube, so that a ventilation space is formed on the outer side of the filter element housing and the inner side of the ventilation housing. The double-walled pipeline filtering and ventilation device is connected and installed on the conveying double-walled pipeline through the ventilation flange with ventilation holes and the ventilation flange docked with the conveying double-walled pipeline.

[0010] Figure 2 This is the design principle diagram of the double-wall pipeline filtering and ventilation device. Its basic principle structure can be intuitively seen through the design principle diagram. At the same time, it does not affect the ventilation function between the inner and outer tubes of the double-wall pipeline. The point is that by using this filtering device, the medium inside the inner tube of the double-wall pipe can be filtered without affecting the ventilation between the inner and outer tubes of the double-wall pipe. Then it can purify the medium and protect the key components. This device is suitable for double-wall pipelines that transport flammable, explosive, and toxic media such as natural gas, methanol, ammonia, etc., and at the same time, ventilation is required between the inner and outer tubes of the double-wall pipe, and the internal medium of the inner tube of the double-wall pipe needs to be filtered.

Claims

1. A double-wall pipeline filtering and ventilation device, comprising a filter element housing, a filter element in the filter element housing, and a ventilation housing, characterized in that: The filter element housing is suspended in the ventilation housing, and double-walled tubes are suspended and nested at both ends of the filter element housing and the ventilation housing. The outer tube of the double-arm tube is a ventilation tube, and the end of the ventilation tube is provided with a ventilation flange. The inner circle of the ventilation flange is connected to the inner tube at both ends of the filter element housing, and the flange wall between the inner tube and the outer tube is provided with ventilation holes arranged along the circumferential direction.

2. The double-wall pipeline filtering and ventilation device according to claim 1, characterized in that: A bracket is provided between the outer lower end of the filter element housing and the inner lower end of the ventilation housing.

3. The double-wall pipeline filtering and ventilation device according to claim 1 or 2, characterized in that: The upper end of the filter element housing and the upper end of the ventilation housing are both provided with housing covers, and the respective housing covers are respectively sealed and connected with the upper end of the filter element housing and the upper end of the ventilation housing through screws.

4. The double-wall pipeline filtering and ventilation device according to claim 1 or 2, characterized in that: The medium in the double-walled pipe inner pipe is filtered through the filter element, the ventilation shell is connected to the outer pipe of the double-walled pipe, the filter shell is connected to the inner pipe of the double-walled pipe, a ventilation space is formed between the outer side of the filter element shell and the inner side of the ventilation shell, and the double-walled pipe filtering and ventilation device is connected and installed in the conveying double-walled pipe through a ventilation flange with ventilation holes and a ventilation flange connected to the conveying double-walled pipe.

5. The double-wall pipeline filtering and ventilation device according to claim 3, characterized in that: The medium in the double-walled pipe inner pipe is filtered through the filter element, the ventilation shell is connected to the outer pipe of the double-walled pipe, the filter shell is connected to the inner pipe of the double-walled pipe, a ventilation space is formed between the outer side of the filter element shell and the inner side of the ventilation shell, and the double-walled pipe filtering and ventilation device is connected and installed in the conveying double-walled pipe through a ventilation flange with ventilation holes and a ventilation flange connected to the conveying double-walled pipe.

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