Pipeline butt joint device

Abstract

The utility model relates to a pipeline butt joint device, and relates to the technical field of oil and gas field emergency rescue devices. The pipeline butt joint device comprises a main base, an auxiliary base, a locking assembly and a bracket assembly. The auxiliary base is movably arranged on the main base and can move in the length direction; the locking assembly is arranged on the main base, and the locking assembly is used for supporting and fixing a main pipeline to be butted; the bracket assemblies are arranged on the main base and the auxiliary base respectively, and the bracket assemblies are arranged at intervals in the length direction; the bracket assembly is used for supporting an auxiliary pipeline to be in butt joint in a rolling mode, and the auxiliary pipeline to be in butt joint and a main pipeline to be in butt joint are coaxially arranged. According to the technical scheme, the problem that the pipeline butt joint speed is low due to the influence of factors such as the uneven ground and the heavy pipe during existing blowout prevention oil pipe screw thread butt joint operation can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of emergency rescue devices for oil and gas fields, and in particular to a pipeline docking device. Background Technology

[0002] Currently, most wellheads in natural gas fields experience annular pressure build-up, and long-term shut-in wells have high shut-in pressures, posing potential risks such as leakage or punctures in the wellhead equipment itself or connecting seals. In the event of abnormal leakage or punctures in the wellhead equipment, it is urgently necessary to connect and install temporary blowout preventer and pressure relief pipelines for emergency response. However, during the threaded connection of the blowout preventer pipe, factors such as uneven ground and heavy pipe materials result in slow pipeline connection speeds, which not only delays emergency rescue time but also increases the risk of escalating the danger and causing secondary disasters. Utility Model Content

[0003] This application provides a pipeline connection device that can solve the problem of slow pipeline connection speed caused by factors such as uneven ground and heavy pipes during existing anti-spray pipe thread connection operations.

[0004] In a first aspect, embodiments of this application provide a pipeline connection device, comprising:

[0005] Main base;

[0006] A secondary base is movably mounted on the main base, and the secondary base is movable along the length direction;

[0007] A locking assembly, disposed on the main base, is used to support and secure the main pipeline to be docked; and

[0008] Bracket assemblies are respectively disposed on the main base and the sub-base, and the bracket assemblies are spaced apart in the length direction;

[0009] The bracket assembly is used to provide rolling support for the secondary pipeline to be connected and to arrange the secondary pipeline to be connected coaxially with the main pipeline to be connected.

[0010] In one embodiment, the bracket assembly includes:

[0011] The support bracket has two support surfaces, which are at an included angle.

[0012] Multiple omnidirectional balls are respectively disposed on the support surface, and the omnidirectional balls on the two support surfaces correspond one-to-one;

[0013] The omnidirectional ball is capable of moving in a direction perpendicular to the support surface to adjust the distance between the omnidirectional ball and the support surface.

[0014] In one embodiment, the locking assembly includes:

[0015] Multiple fixed supports are disposed on the main base, and the multiple fixed supports are arranged at intervals along the length direction, supporting the main pipeline to be connected;

[0016] A limiting part is rotatably disposed between two adjacent fixed supports; and

[0017] A locking part is provided on the main base, and the locking part can lock and fix the limiting part so that the limiting part presses against the outer wall of the main tube to be docked.

[0018] In one embodiment, the limiting portion includes:

[0019] The rotating shaft is rotatably disposed between two adjacent fixed supports at both ends;

[0020] Multiple pressure caps, one end of which is disposed on the rotating shaft, are spaced apart along the length direction, and the pressure caps abut against the outer wall of the main tube to be docked; and

[0021] A fixing seat is provided at the end of the pressure cover away from the rotating shaft, and the fixing seat is provided with a first locking hole.

[0022] In one embodiment, the locking part includes:

[0023] A locking seat is disposed on the main base, and the locking seat is provided with a second locking hole communicating with the first locking hole; and

[0024] The locking handwheel is threadedly connected to the first locking hole and the second locking hole so that the fixed seat is connected to the locking seat.

[0025] In one embodiment, the cap is an arc-shaped cap.

[0026] In one embodiment, the main base is provided with a through groove extending through the main base in the length direction, and the sub-base is shaped to fit the through groove.

[0027] In one embodiment, the main base is provided with a main positioning hole; the sub-base is provided with a plurality of sub-positioning holes spaced apart along the length direction.

[0028] In this device, one of the multiple secondary positioning holes is connected to the main positioning hole. The pipeline docking device also includes a positioning pin, which is threadedly connected to the main positioning hole and the secondary positioning hole to fix the secondary base on the main base.

[0029] In one embodiment, the pipeline docking device further includes multiple sets of main support members arranged at intervals along the length direction, each set of main support members including main base feet respectively disposed on both sides of the main base.

[0030] In one embodiment, the pipeline docking device further includes at least one set of auxiliary support members, the auxiliary support members including auxiliary base plates respectively disposed on both sides of the auxiliary base.

[0031] Compared with existing technologies, the advantages of this application's embodiments are as follows: By setting a locking component to support the main pipeline to be connected, a flat and stable connection environment is provided for the main pipeline. This solves the problem that existing connection operations, where the main pipeline is directly placed on the ground, are easily affected by uneven ground, thus slowing down the connection process. Simultaneously, using the locking component to secure the main pipeline to be connected reduces the workload of operators compared to the manual fixing required in existing connection operations. It also prevents the main pipeline from moving during the connection process, increasing the speed of pipeline connection. The bracket component rolls to support the secondary pipeline to be connected, reducing the friction between the secondary pipeline and the bracket component. Operators can easily move the secondary pipeline closer to the main pipeline and rotate it to tighten the connection. Therefore, this invention can meet the requirements for rapid connection of emergency pipelines, effectively avoiding incorrect connections, accidental snapping, and thread damage, reducing the labor intensity of emergency rescue personnel, improving the timeliness of emergency response, and preventing the escalation of accidents and secondary disasters. Attached Figure Description

[0032] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0033] Figure 1 This is a top view of a pipeline docking device provided in one embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A schematic diagram of the main base provided in the embodiment;

[0035] Figure 3 yes Figure 1 A schematic diagram of the sub-base provided in the embodiment;

[0036] Figure 4 yes Figure 1 A side view of the locking assembly provided in the embodiment.

[0037] Figure label:

[0038] 10. Main base; 110. Through groove; 120. Main positioning hole;

[0039] 20. Secondary base; 210. Secondary positioning hole; 220. Positioning pin;

[0040] 30. Locking assembly; 310. Fixed bracket; 320. Limiting part; 3201. Rotating shaft; 3202. Pressure cap; 3203. Fixed base; 3204. First locking hole; 330. Locking part; 3301. Locking seat; 3302. Second locking hole; 3303. Locking handwheel;

[0041] 40. Bracket assembly; 410. Mounting bracket; 420. Universal ball joint;

[0042] 50. Main support component; 510. Main base plate;

[0043] 60. Secondary support component; 610. Secondary base plate. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings.

[0045] Currently, most wellheads in natural gas fields experience annular pressure build-up, and long-term shut-in wells have high shut-in pressures, posing potential risks such as leakage or punctures in the wellhead equipment itself or connecting seals. In the event of abnormal leakage or punctures in the wellhead equipment, it is urgently necessary to connect and install temporary blowout preventer and pressure relief pipelines for emergency response. However, during the threaded connection of the blowout preventer pipe, factors such as uneven ground and heavy pipe materials result in slow pipeline connection speeds, which not only delays emergency rescue time but also increases the risk of escalating the danger and causing secondary disasters.

[0046] Example 1

[0047] like Figure 1 As shown, in order to solve the above-mentioned technical problems, this application provides a pipeline docking device, including a main base 10, a secondary base 20, a locking assembly 30, and a bracket assembly 40; the secondary base 20 is movably disposed on the main base 10 and can move along the length direction; the locking assembly 30 is disposed on the main base 10 and is used to support and fix the main pipeline to be docked; the bracket assembly 40 is respectively disposed on the main base 10 and the secondary base 20 and is spaced apart in the length direction; wherein, the bracket assembly 40 is used to roll support the secondary pipeline to be docked and to make the secondary pipeline to be docked coaxial with the main pipeline to be docked.

[0048] As can be seen from the above, by setting the locking component 30 to support the main pipeline to be connected, a flat and stable connection environment is provided for the main pipeline. This solves the problem that in existing connection operations, the main pipeline is directly placed on the ground for connection, which is easily affected by uneven ground and affects the connection speed. At the same time, by using the locking component 30 to lock and fix the main pipeline to be connected, compared with the manual fixing of the main pipeline to be connected in existing connection operations, it can not only reduce the labor intensity of the operators, but also prevent the main pipeline to be connected from moving during the connection operation, thus improving the connection speed. By using the bracket component 40 to support the secondary pipeline to be connected, the friction between the secondary pipeline to be connected and the bracket component 40 is reduced. Operators can easily drag the secondary pipeline to be connected close to the main pipeline by moving back and forth, and rotate the secondary pipeline to be connected to tighten the connection between the two pipelines. Thus, this utility model can meet the needs of rapid connection of emergency pipelines, effectively avoid mis-connection, snapping, and thread damage, reduce the labor intensity of emergency rescue personnel, improve the timeliness of emergency response, and prevent the escalation of accidents and secondary disasters.

[0049] It should be noted that when performing threaded connection work on the anti-blowout hose, the anti-blowout hose includes the main pipeline to be connected and the auxiliary pipeline to be connected. The end of the main pipeline to be connected is equipped with a tailpipe head, and the beginning of the auxiliary pipeline to be connected is equipped with a pipeline short section. The pipeline short section needs to be placed inside the tailpipe head, and the pipeline short section should be rotated to make the pipeline short section and the tailpipe head threadedly connected. Then, use pipe wrenches to tighten and confirm, thereby completing the connection and installation of the two pipelines.

[0050] It should also be noted that, such as Figure 1 As shown, the length direction is parallel to the X direction.

[0051] It should also be noted that the number of bracket assemblies 40 can be set according to actual needs. The number of bracket assemblies 40 in the main base 10 and the secondary base 20 can be equal or unequal. This application does not impose specific restrictions. For example, Figures 1-3 As shown, a bracket assembly 40 is provided on the main base 10 and the secondary base 20 respectively. In addition, the bracket assembly 40 and the locking assembly 30 are arranged at intervals in the length direction, and the bracket assembly 40 and the locking assembly 30 are located at both ends of the main base 10 respectively.

[0052] Example 2

[0053] like Figure 1As shown, the pipeline docking device includes a main base 10, a secondary base 20, a locking assembly 30, and a bracket assembly 40. The secondary base 20 is movably mounted on the main base 10 and can move along its length. The locking assembly 30 is mounted on the main base 10 and is used to support and fix the main pipeline to be docked. The bracket assembly 40 is mounted on the main base 10 and the secondary base 20 respectively, and the bracket assembly 40 is spaced apart along its length. The bracket assembly 40 is used to roll support the secondary pipeline to be docked and to make the secondary pipeline to be docked coaxial with the main pipeline to be docked.

[0054] As can be seen from the above, by setting the locking component 30 to support the main pipeline to be connected, a flat and stable connection environment is provided for the main pipeline. This solves the problem that in existing connection operations, the main pipeline is directly placed on the ground for connection, which is easily affected by uneven ground and affects the connection speed. At the same time, by using the locking component 30 to lock and fix the main pipeline to be connected, compared with the manual fixing of the main pipeline to be connected in existing connection operations, it can not only reduce the labor intensity of the operators, but also prevent the main pipeline to be connected from moving during the connection operation, thus improving the connection speed. By using the bracket component 40 to support the secondary pipeline to be connected, the friction between the secondary pipeline to be connected and the bracket component 40 is reduced. Operators can easily drag the secondary pipeline to be connected close to the main pipeline by moving back and forth, and rotate the secondary pipeline to be connected to tighten the connection between the two pipelines. Thus, this utility model can meet the needs of rapid connection of emergency pipelines, effectively avoid mis-connection, snapping, and thread damage, reduce the labor intensity of emergency rescue personnel, improve the timeliness of emergency response, and prevent the escalation of accidents and secondary disasters.

[0055] It should be noted that when performing threaded connection work on the anti-blowout hose, the anti-blowout hose includes the main pipeline to be connected and the auxiliary pipeline to be connected. The end of the main pipeline to be connected is equipped with a tailpipe head, and the beginning of the auxiliary pipeline to be connected is equipped with a pipeline short section. The pipeline short section needs to be placed inside the tailpipe head, and the pipeline short section should be rotated to make the pipeline short section and the tailpipe head threadedly connected. Then, use pipe wrenches to tighten and confirm, thereby completing the connection and installation of the two pipelines.

[0056] It should also be noted that, such as Figure 1 As shown, the length direction is parallel to the X direction.

[0057] It should also be noted that the number of bracket assemblies 40 can be set according to actual needs. The number of bracket assemblies 40 in the main base 10 and the secondary base 20 can be equal or unequal. This application does not impose specific restrictions. For example, Figures 1-3 As shown, a bracket assembly 40 is provided on the main base 10 and the secondary base 20 respectively. In addition, the bracket assembly 40 and the locking assembly 30 are arranged at intervals in the length direction, and the bracket assembly 40 and the locking assembly 30 are located at both ends of the main base 10 respectively.

[0058] like Figures 1-3 As shown, in some embodiments, the bracket assembly 40 includes a support bracket 410 and a plurality of omnidirectional balls 420; the support bracket 410 is provided with two support surfaces, and the two support surfaces have an included angle; the plurality of omnidirectional balls 420 are respectively disposed on the support surfaces, and the omnidirectional balls 420 on the two support surfaces correspond one-to-one; wherein, the omnidirectional balls 420 are capable of moving in a direction perpendicular to the support surface to adjust the distance between the omnidirectional balls 420 and the support surface.

[0059] The omnidirectional ball 420 provides rolling support for the secondary pipeline to be connected. Rolling friction is generated between the omnidirectional ball 420 and the secondary pipeline, reducing the friction experienced by the secondary pipeline compared to sliding friction. This facilitates the movement and rotation of the secondary pipeline, reducing the workload of the operators. By moving the omnidirectional ball 420 perpendicular to the support surface, the distance between the omnidirectional ball 420 and the support surface can be adjusted. This allows for adjustment of the position of the secondary pipeline according to its diameter, ensuring that the secondary pipeline and the main pipeline are coaxially aligned. This effectively prevents mis-threading and premature threading during threading operations, further improving the efficiency of emergency response.

[0060] It should be noted that the two support surfaces with an included angle form a V-shaped support groove. Of course, the support bracket 410 can be a V-shaped bracket.

[0061] It should also be noted that the universal ball 420 is a universal ball 420 with a screw. The screw of the universal ball 420 is threadedly connected to the support bracket 410. Turning the screw causes the universal ball 420 to move in a direction perpendicular to the support surface, thereby adjusting the distance between the universal ball 420 and the support surface.

[0062] It should also be noted that the universal balls 420 on the two support surfaces correspond one-to-one, that is, the number and position of the universal balls 420 on the two support surfaces are corresponding, and the shells of the universal balls 420 on the two support surfaces can be symmetrical about the hosting bracket 410.

[0063] like Figures 1-2 As shown, in some embodiments, the locking assembly 30 includes a plurality of fixed brackets 310, a limiting part 320, and a locking part 330; the plurality of fixed brackets 310 are disposed on the main base 10 and are spaced apart along the length direction, and the fixed brackets 310 support the main pipeline to be docked; the limiting part 320 is rotatably disposed between two adjacent fixed brackets 310; the locking part 330 is disposed on the main base 10 and can lock the limiting part 320 so that the limiting part 320 presses against the outer wall of the main pipeline to be docked.

[0064] The main pipeline to be connected is supported by the fixed bracket 310. The limiting part 320 is rotated and abuts against the outer wall of the main pipeline to be connected. The locking part 330 is used to lock and fix the limiting part 320, so that the limiting part 320 presses the main pipeline to be connected, thereby preventing the main pipeline to be connected from moving and preparing for pipeline connection.

[0065] It should be noted that the specific number of fixed brackets 310 is set according to actual needs; for example, such as Figure 1 , Figure 2 As shown, there are two fixing brackets 310 and one limiting part 320. Alternatively, the fixing bracket 310 can be a V-shaped bracket.

[0066] In some embodiments, the limiting part 320 includes a rotating shaft 3201, a plurality of pressure caps 3202, and a fixing seat 3203; the two ends of the rotating shaft 3201 are rotatably disposed between two adjacent fixing brackets 310; one end of the plurality of pressure caps 3202 is disposed on the rotating shaft 3201, the plurality of pressure caps 3202 are arranged at intervals along the length direction, and the pressure caps 3202 abut against the outer wall of the main tube to be docked; the fixing seat 3203 is disposed at the end of the pressure caps 3202 away from the rotating shaft 3201, and the fixing seat 3203 is provided with a first locking hole 3204.

[0067] By rotating the pressure cap 3202, the pressure cap 3202 abuts against the outer wall of the main pipeline to be connected, and the pressure cap 3202 is locked and fixed by the cooperation of the fixing seat 3203 and the limiting part 320.

[0068] It should be noted that both ends of the rotating shaft 3201 are rotatably connected to the fixed bracket 310 via rolling bearings, among other things; furthermore, the number of pressure caps 3202 is set according to actual needs, for example, such as Figure 2 As shown, there are two caps 3202.

[0069] like Figure 2 , Figure 4 As shown, in some embodiments, the locking part 330 includes a locking seat 3301 and a locking handwheel 3303; the locking seat 3301 is disposed on the main base 10, and the locking seat 3301 is provided with a second locking hole 3302 that communicates with the first locking hole 3204; the locking handwheel 3303 is threadedly connected to the first locking hole 3204 and the second locking hole 3302 so that the fixed seat 3203 is connected to the locking seat 3301.

[0070] The first locking hole 3204 is connected to the second locking hole 3302 and is coaxially arranged. By rotating the locking handwheel 3303, the fixing seat 3203 is connected to the locking seat 3301, thereby locking and fixing the cover 3202. This ensures that the cover 3202 fixes the main pipeline to be connected, prevents it from shifting, and facilitates the connection.

[0071] like Figure 2 , Figure 4 As shown, in some embodiments, the pressure cap 3202 is an arc-shaped pressure cap 3202.

[0072] Since the main pipeline to be connected is a round pipe, the arc-shaped pressure cap 3202 can better fit with the main pipeline to be connected, ensuring a secure fixation effect.

[0073] like Figure 2 As shown, in some embodiments, the main base 10 is provided with a through groove 110 that extends through the main base 10 in the length direction, and the sub-base 20 is shaped to fit the through groove 110.

[0074] The shape of the sub-base 20 matches that of the through groove 110, providing guidance for the movement of the sub-base 20, which is simple and convenient.

[0075] like Figure 2 As shown, in some embodiments, the main base 10 is provided with a main positioning hole 120; the sub-base 20 is provided with a plurality of sub-positioning holes 210 arranged at intervals along the length direction; wherein, one of the sub-positioning holes 210 is connected to the main positioning hole 120, and the pipeline docking device further includes a positioning pin 220, which is threadedly connected to the main positioning hole 120 and the sub-positioning hole 210 so that the sub-base 20 is fixed on the main base 10.

[0076] The secondary base 20 is slidably connected to the main base 10. Moving the secondary base 20 changes the length of the pipeline docking device, facilitating pipeline support and fixation, and is suitable for various pipelines. The secondary base 20 is fixed by providing a secondary positioning hole 210, a main positioning hole 120, and a positioning pin 220.

[0077] like Figures 1-2 As shown, in some embodiments, the pipeline docking device further includes multiple sets of main support members 50 arranged at intervals along the length direction, each set of main support members 50 including main base feet 510 respectively disposed on both sides of the main base 10.

[0078] It should be noted that the specific number of main support components 50 is set according to actual needs, such as... Figure 1 , Figure 2 As shown, there are two sets of main support members 50.

[0079] like Figure 1 , Figure 3 As shown, in some embodiments, the pipeline docking device further includes at least one set of auxiliary support members, the auxiliary support members including auxiliary base feet 610 respectively disposed on both sides of the auxiliary base 20.

[0080] It should be noted that the specific number of secondary main support components 50 is set according to actual needs, such as... Figure 1 , Figure 3 As shown, the number of secondary support components is one set.

[0081] The main support component 50 and the auxiliary support component provide support for the pipeline connection device, ensuring the stability of the pipeline connection device.

[0082] During installation, place the tail end of the main pipeline to be connected on the fixed bracket 310, with the sleeve of the tail end extending out of the locking assembly 30. Rotate the pressure cap 3202 until it abuts against the outer wall of the tail end, then rotate the locking handwheel 3303 to lock the pressure cap 3202, which locks the tail end. Adjust the position of the universal ball 420 according to the pipeline diameter, place the short section of the auxiliary pipeline to be connected on the support bracket 410, and use the rolling of the universal ball 420 to reduce the friction between the short section and the support bracket 410. Move and drag the short section back and forth into the sleeve of the tail end. Rotate the short section clockwise, and the two pipe ends will be engaged and tightened. Then use pipe wrenches to re-tighten and confirm, thus completing the connection and installation of the two pipelines.

[0083] When disassembling, the difference from the above operation is that the pipeline section is rotated counterclockwise, and the two pipe ends are disengaged, thus completing the disassembly of the two pipelines.

[0084] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipeline docking device, characterized in that, include: Main base; A secondary base is movably mounted on the main base, and the secondary base is movable along the length direction; A locking assembly is disposed on the main base, and the locking assembly is used to support and fix the main pipeline to be docked. as well as Bracket assemblies are respectively disposed on the main base and the sub-base, and the bracket assemblies are spaced apart in the length direction; The bracket assembly is used to provide rolling support for the secondary pipeline to be connected and to arrange the secondary pipeline to be connected coaxially with the main pipeline to be connected.

2. The pipeline docking device according to claim 1, characterized in that, The bracket assembly includes: The support bracket has two support surfaces, which are at an included angle. Multiple omnidirectional balls are respectively disposed on the support surface, and the omnidirectional balls on the two support surfaces correspond one-to-one; The omnidirectional ball is capable of moving in a direction perpendicular to the support surface to adjust the distance between the omnidirectional ball and the support surface.

3. The pipeline docking device according to claim 1, characterized in that, The locking assembly includes: Multiple fixed supports are disposed on the main base, and the multiple fixed supports are arranged at intervals along the length direction, supporting the main pipeline to be connected; A limiting part is rotatably disposed between two adjacent fixed supports; and A locking part is provided on the main base, and the locking part can lock and fix the limiting part so that the limiting part presses against the outer wall of the main tube to be docked.

4. The pipeline docking device according to claim 3, characterized in that, The limiting part includes: The rotating shaft is rotatably disposed between two adjacent fixed supports at both ends; Multiple pressure caps, one end of which is disposed on the rotating shaft, are spaced apart along the length direction, and the pressure caps abut against the outer wall of the main tube to be docked; and A fixing seat is provided at the end of the pressure cover away from the rotating shaft, and the fixing seat is provided with a first locking hole.

5. The pipeline docking device according to claim 4, characterized in that, The locking part includes: A locking seat is disposed on the main base, and the locking seat is provided with a second locking hole communicating with the first locking hole; and The locking handwheel is threadedly connected to the first locking hole and the second locking hole so that the fixed seat is connected to the locking seat.

6. The pipeline docking device according to claim 4, characterized in that, The cap is an arc-shaped cap.

7. The pipeline connection device according to any one of claims 1-6, characterized in that, The main base has a through groove extending through it in the length direction, and the sub-base is shaped to fit the through groove.

8. The pipeline docking device according to claim 7, characterized in that, The main base is provided with a main positioning hole; the sub-base is provided with a plurality of sub-positioning holes arranged at intervals along the length direction. In this device, one of the multiple secondary positioning holes is connected to the main positioning hole. The pipeline docking device also includes a positioning pin, which is threadedly connected to the main positioning hole and the secondary positioning hole to fix the secondary base on the main base.

9. The pipeline connection device according to any one of claims 1-6, characterized in that, The pipeline docking device also includes multiple sets of main support members arranged at intervals along the length direction, and each set of main support members includes main base feet respectively disposed on both sides of the main base.

10. The pipeline docking device according to any one of claims 1-6, characterized in that, The pipeline docking device further includes at least one set of auxiliary support members, the auxiliary support members including auxiliary base feet respectively disposed on both sides of the auxiliary base.

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