Connecting device for gas path pipelines with different inner diameters for experimental research

Abstract

The invention discloses a connecting device for gas path pipelines with different inner diameters for experimental research, and belongs to the technical field of pipeline connection. The device comprises a one-dimensional guide rail, a linear guide rail sliding block, a pipeline connecting spacer, a fixed straight rod and a pipeline clamping mechanism. Two slidable linear guide rail sliding blocks are arranged on the one-dimensional guide rail, the one-dimensional guide rail is connected with a pipeline clamping mechanism base through a fixing straight rod, and dovetail grooves are formed in the pipeline clamping mechanism base and the top plate so that replaceable pipeline clamping sliding blocks can be installed to adapt to pipelines with different outer diameters. Inserting grooves are formed in the opposite sides of the two clamping mechanisms, a pipeline connecting spacer made of elastic rubber is inserted into the inserting grooves, a center through hole of the inserting grooves is matched with a pipeline with the small inner diameter, and sudden change of the section of an air channel is reduced. The two pipeline clamping mechanisms are connected through a base and a hose clamp of a top plate cylinder to achieve sealing, and the height of a guide rail sliding block can be adjusted to guarantee that pipelines are coaxial. A pipeline connector does not need to be machined, operation is easy and convenient, the device is particularly suitable for pipelines small in outer diameter and thick in pipe wall, the problems that a traditional connecting device damages an internal gas circuit structure and is high in cost are solved, and experimental analysis and multi-inner-diameter combination research are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of pipeline connection devices, and more specifically, to a gas pipeline connection device with different inner diameters for experimental research. Background Art

[0002] The gas static pressure system is an important component in ultra-precision instruments. Compressed gas passes through various pipeline structures of the gas static pressure system and finally jets out through the throttle holes. When analyzing gas static pressure systems composed of different pipeline structures, especially pipeline structures with sudden changes in inner diameter, due to the difficulty in processing such structures, the inner diameters of the pipelines used are relatively small, usually within 6 mm, and combinations of pipelines with different inner diameters cannot be replaced with each other. Therefore, simulation analysis is usually adopted, and there are few experiments on physical structures.

[0003] Currently, quick connectors are usually used for connecting pipelines with different inner diameters. However, this device can only connect flexible hoses. When studying the influence of inner diameter changes on the gas path in experiments, there are multiple sudden changes in the inner diameter of the gas path inside the pipeline formed after connecting the pipelines with the existing pipeline connection devices, that is, the inner diameter of the cavity at the connection position is inconsistent with the inner diameter of the connected pipeline, and it cannot meet the experimental analysis requirements for the pipeline splicing structure under ideal conditions. For the connection of rigid pipelines, the current connection devices have the same problem, which will lead to multiple changes in the inner diameter of the pipeline passage at the connection part. Processing the connection structure separately cannot flexibly change the inner diameter combination of the pipeline connection, and the cost is too high. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a gas pipeline connection device with different inner diameters for experimental research.

[0005] To achieve the above object of the invention, the present invention is realized through the following technical solutions:

[0006] A gas pipeline connection device with different inner diameters for experimental research, characterized in that: the device includes a one-dimensional guide rail, a linear guide rail slider, a pipeline connection spacer, a fixed straight rod, and a pipeline clamping mechanism;

[0007] There are two linear guide rail sliders provided on the one-dimensional guide rail. A cylinder is provided on the linear guide rail slider, and the linear guide rail slider is connected to the base of the pipeline clamping mechanism through a fixed straight rod;

[0008] The pipeline clamping mechanism is suitable for fixing pipelines with different inner diameters and is used in pairs. In each pipeline clamping mechanism, its base is connected to the fixed straight rod. Dovetail grooves are opened on both the base and the top plate of the pipeline clamping mechanism. The bottom pipeline clamping slider and the top pipeline clamping slider can respectively slide into the base and the top plate of the pipeline clamping mechanism through the dovetail grooves. The opposite sides of the two pipeline clamping mechanisms are in contact with the pipeline connection spacer.

[0009] In one embodiment, a fastening screw is provided on the side of the mounting base on the linear guide slider for changing the height of the fixed straight rod.

[0010] In one embodiment, the pipeline is respectively matched with the pipeline clamping mechanism base and the pipeline clamping mechanism top plate through the bottom pipeline clamping slider and the top pipeline clamping slider. The dovetail groove of the pipeline clamping mechanism base is perpendicular to the pipeline installation direction, and the dovetail groove of the pipeline clamping mechanism top plate is parallel to the pipeline installation direction. A slot is provided on one side of the pipeline clamping mechanism base, and the pipeline connection spacer can be inserted into the slot; for another group of pipeline clamping mechanisms, the pipeline connection spacer is not required to be installed. After the pipeline is installed, the cross-section of the pipeline slightly exceeds the side surface opposite to the pipeline clamping mechanism.

[0011] In one embodiment, on the opposite sides of the pipeline clamping mechanism, the base and the top plate are provided with opposite semi-cylindrical bodies, and the cylindrical bodies of the base and the top plate are connected to the cylindrical bodies on the same side of another pipeline clamping mechanism through a perforated hose clamp.

[0012] In one embodiment, the base and the top plate of the pipeline clamping mechanism are provided with through holes on both the left and right sides. The pipeline clamping mechanism base is provided with mounting holes below the through holes for placing gaskets and nuts. The fastening screw passes through the through hole of the pipeline clamping mechanism top plate and is connected to the base nut.

[0013] In one embodiment, the pipeline connection spacer is made of elastic rubber material, and a through hole is opened at the center point, and the diameter is the same as the inner diameter of the pipeline with the smaller inner diameter among the two pipelines.

[0014] Compared with the background art, the present invention has the following beneficial effects:

[0015] The present invention has no requirements for the pipelines used for connection, and there is no need to perform operations such as threading the pipeline interface. The operation is simple, especially suitable for connecting pipelines with relatively thick pipe walls and small outer diameters. Appropriate pipeline clamping sliders can be selected for assembly according to the outer diameter of the pipeline. The structure is simple and does not damage the ideal internal pipeline connection structure. There is only one cross-section where the pipeline becomes larger or smaller in the pipeline after connection, which is convenient for further analysis according to the pipeline structure after ventilation and for replacing different inner diameter pipeline combinations for subsequent research. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a device for connecting pipelines with different inner diameters according to an embodiment of the present application.

[0017] Figure 2 is a three-dimensional view of the top structure of the pipeline clamping mechanism of the device for connecting pipelines with different inner diameters according to an embodiment of the present application.

[0018] Figure 3 is a three-dimensional view of the bottom structure of the pipeline clamping mechanism of the device for connecting pipelines with different inner diameters according to an embodiment of the present application.

[0019] Figure 4 is a three-dimensional view of the pipe clamping top slider structure of the pipe connection device with different inner diameters in the embodiment of the present application.

[0020] Figure 5 is a three-dimensional view of the pipe clamping bottom slider structure of the pipe connection device with different inner diameters in the embodiment of the present application.

[0021] Figure 6 is a three-dimensional view of the pipe connection spacer structure of the pipe connection device with different inner diameters in the embodiment of the present application.

[0022] In the figure: 1. Top plate of the pipe clamping mechanism; 2. Fastening screw; 3. Top pipe clamping slider; 4. Connecting pipe; 5. Bottom pipe clamping slider; 6. Base of the pipe clamping mechanism; 7. Movable straight rod; 8. Perforated hose clamp; 9. Pipe connection spacer; 10. Linear guide slider; 11. One-dimensional guide rail; 12. Fastening screw mounting hole; 13. Hose clamp mounting post; 14. Dovetail groove; 15. Nut mounting hole; 16. Fixed straight rod mounting hole; 17. Pipe connection spacer mounting groove; 18. Pipe mounting groove; 19. Center hole of the pipe connection spacer. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] As Figures 1 to 6 shown, a pipe connection device for realizing pipes with different inner diameters includes a one-dimensional guide rail 11, a linear guide slider 10, a pipe connection spacer 9, a fixed straight rod 7, and a pipe clamping mechanism.

[0025] As Figure 1 shown, there are two linear guide sliders 10 provided on the one-dimensional guide rail 11. A cylinder is provided on the linear guide slider 10. The linear guide slider 10 is connected to the base 6 of the pipe clamping mechanism through a fixed straight rod 7.

[0026] There are two pipe clamping mechanisms in total. The base 6 of the pipe clamping mechanism is connected to the fixed straight rod 7. Dovetail grooves are provided on both the base 6 of the pipe clamping mechanism and the top plate 1 of the pipe clamping mechanism. The bottom pipe clamping slider 5 and the top pipe clamping slider 3 can respectively slide into the base 6 of the pipe clamping mechanism and the top plate 1 of the pipe clamping mechanism through the dovetail grooves. One side of the two pipe clamping mechanisms facing each other is connected to the pipe connection spacer 9.

[0027] To adjust the relative positions of the two connecting pipes, a fastening screw is provided on the side of the cylinder on the linear guide slider 10 to change the height of the fixed straight rod 7, thereby adjusting the heights of the two pipes. The one-dimensional guide 11 ensures that the two pipes are in the same plane, and only by adjusting the heights of the two pipe clamping mechanisms can the coaxiality of the two pipes be ensured.

[0028] To accommodate pipes of different sizes, especially pipes with a smaller inner diameter, the pipe clamping sliders can be replaced according to the actual pipe size. The pipe is connected to the pipe clamping mechanism base 6 and the pipe clamping mechanism top plate 1 through the bottom pipe clamping slider 5 and the top pipe clamping slider 3 respectively. The dovetail groove of the pipe clamping mechanism base 6 is perpendicular to the pipe installation direction, and the dovetail groove of the pipe clamping mechanism top plate 1 is parallel to the pipe. Two slots 17 are provided on one side of the two pipe clamping mechanism bases facing each other, and the tenon of the pipe connection spacer 9 can be inserted into the two slots 17. The base 6 and the top plate 1 of the pipe clamping mechanism have through holes 12 on both the left and right sides. The pipe clamping mechanism base 6 is provided with mounting holes 15 below the through holes for placing gaskets and nuts. The fastening screw passes through the through hole 12 of the pipe clamping mechanism top plate and is connected to the base nut.

[0029] To increase the sealing performance of the device, the pipe connection spacer 8 is made of elastic rubber, and a through hole 19 is opened at the center point with a diameter consistent with the inner diameter of the smaller of the two pipes. On one side of the pipe clamping mechanism, the base and the top plate are provided with opposite semi-cylindrical bodies 13. The columns of the base and the top plate and the columns 13 on the same side of another pipe clamping mechanism are connected by a perforated hose clamp 8.

[0030] The working principle of the different inner diameter pipe connection device in this application is as follows:

[0031] Determine the outer diameters of the two pipes, select the corresponding bottom pipe clamping slider 5 and top pipe clamping slider 3 according to the pipe outer diameters, assemble the corresponding sliders into the pipe clamping mechanism base 6 and the pipe clamping mechanism top plate 1 through the dovetail grooves 14 respectively, and tighten the fastening screws 2 of the pipe clamping mechanism to ensure that there is no relative movement between the pipe and the pipe clamping mechanism. At this time, the cross-section of one side of the pipe should slightly exceed the end face of the pipe clamping slider. After processing a through hole with the same size as the inner diameter of the smaller pipe at the center point of the pipe connection spacer and inserting it into the slot, adjust the heights of the two pipe clamping mechanisms. After determining the coaxiality of the two pipes, lock the fastening screws of the linear guide slider. After bringing the two pipe clamping mechanisms close to each other, use a perforated hose clamp 8 to connect the columns 13 of the two pipe clamping mechanism bases and top plates, and alternately lock the perforated hose clamps 8 of the base and the top plate until the pipe connection device is sealed.

[0032] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and changes to some of the technical features without creative labor according to the disclosed technical content, and these substitutions and changes are all within the protection scope of the present invention.

Claims

1. A connecting device for gas pipelines with different inner diameters for experimental research, characterized in that: The device includes a one-dimensional guide rail 11, a linear guide rail slider 10, a pipe connection spacer 9, a fixed straight rod 7, and a pipe clamping mechanism; Two linear guide rail sliders 10 are provided on the one-dimensional guide rail 11. A cylinder is provided on the linear guide rail slider 10. The linear guide rail slider 10 is connected to the base 6 of the pipe clamping mechanism through a fixed straight rod 7; The pipe clamping mechanism is applicable to fixing pipes with different inner diameters and is used in pairs. In each pipe clamping mechanism, its base 6 is connected to the fixed straight rod 7. Dovetail grooves are provided on both the base 6 and the top plate 1 of the pipe clamping mechanism. The bottom pipe clamping slider 5 and the top pipe clamping slider 3 can slide into the base 6 and the top plate 1 of the pipe clamping mechanism through the dovetail grooves respectively. One side of the two pipe clamping mechanisms in contact with the pipe connection spacer 9.

2. The connection device for gas pipelines with different inner diameters used for experimental research according to claim 1, characterized in that: A fastening screw is provided on the side of the cylinder on the linear guide rail slider 10 for changing the height of the fixed straight rod 7.

3. The different inner diameter gas pipeline connection device for experimental research according to claim 1, characterized in that: The pipe is matched with the base 6 and the top plate 1 of the pipe clamping mechanism through the bottom pipe clamping slider 5 and the top pipe clamping slider 3 respectively. The dovetail groove of the base 6 of the pipe clamping mechanism is perpendicular to the pipe installation direction, and the dovetail groove of the top plate 1 of the pipe clamping mechanism is parallel to the pipe installation direction. A slot 17 is provided on one side of the base of the pipe clamping mechanism, and the pipe connection spacer 9 can be inserted into the slot 17; the other set of pipe clamping mechanisms does not need to install the pipe connection spacer 9. After the pipe is installed, the pipe cross-section slightly exceeds the side surface opposite to the pipe clamping mechanism.

4. The different inner diameter gas pipeline connection device for experimental research according to claim 1, characterized in that: On one side of the pipe clamping mechanism opposite to each other, the base and the top plate are provided with opposite semi-cylindrical bodies 13. The cylindrical bodies of the base and the top plate are connected to the cylindrical bodies 13 on the same side of the other pipe clamping mechanism through a perforated hose clamp.

5. A connecting device for gas pipelines with different inner diameters for experimental research according to claim 1, characterized in that: Both the base 6 and the top plate 1 of the pipe clamping mechanism have through holes 11 on the left and right sides. An installation hole 14 is provided below the through hole of the base 6 of the pipe clamping mechanism for placing gaskets and nuts. The fastening screw passes through the through hole 11 of the top plate of the pipe clamping mechanism and is connected to the base nut.

6. The different inner diameter gas pipeline connection device for experimental research according to claim 1, characterized in that: The pipe connection spacer 8 is made of elastic rubber material, and a through hole 18 is provided at the center point, and the diameter is the same as the inner diameter of the pipe with the smaller inner diameter of the two pipes.

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