Double-supporting-column base and single-supporting-column base suitable for height-increasing row support

Abstract

The utility model provides a double-supporting-column base and a single-supporting-column base which are suitable for a row support capable of being heightened. The double-supporting-column base comprises a base body, a guiding column connecting part connected with the guiding column is formed in the middle of the base body, supporting column connecting parts connected with the two supporting columns are formed on the two sides of the base body respectively, the supporting column connecting parts are lifted to form inserting structures, and the inserting structures are used for being inserted into the ends of the supporting columns. According to the technical scheme, the supporting column connecting portion of the double-supporting-column base is lifted to form the inserting connection structure, and the stability of connection between the supporting columns and the base is remarkably improved. The inserting structure provides a deeper inserting depth, so that the end part of the supporting column can be deeply inserted, the movable clearance amount between the supporting column and the base is reduced, the phenomena of transverse sliding and front-back shaking are inhibited or reduced, and when the bracket runs on an uneven surrounding rock bottom plate, each supporting assembly can be stably kept at a vertical position.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and more specifically, to a double-support column base and a single-support column base suitable for height-adjustable linked supports. Background Technology

[0002] The modular support system is an innovative piece of equipment used for temporary support during mining operations, designed to improve the safety and efficiency of roadway support work. Traditional temporary support equipment uses telescopic support columns to support the roof, but due to uneven roadway floors, these columns are prone to slippage or tilting, posing a risk of collapse and incurring high maintenance costs. By introducing guide columns into the equipment, the stability and safety of the support system are optimized. The guide columns have significantly higher mechanical strength than telescopic support columns, providing additional support when the support columns slip and cause the equipment to tilt, preventing further tilting, ensuring construction safety, and reducing equipment damage and maintenance costs. Furthermore, the flexible design of the guide columns allows them to adapt to changes in height during support movement, thus not hindering flexible operation of the support system.

[0003] In Chinese patent CN109578040B, a row support system consists of two supports with their strip-shaped top beams spaced apart. Both supports support the same roof slab, allowing one support to move forward while the other moves forward, providing continuous support. It comprises a first support, a second support, a drive unit, telescopic support columns, and guide columns. The guide columns are fixedly connected to the supports and adapt to dynamic adjustments via sliding or hinged mechanisms. The guide columns are typically designed to be slightly lower than the telescopic support columns to provide sufficient operating space when the support moves forward or backward. During support operations, the guide columns can withstand equipment tilting forces, protecting the telescopic support columns from bending or breakage. To enhance equipment stability, the guide columns are usually made of hollow or solid high-strength materials and have a base that contacts the tunnel floor, increasing the contact area and enhancing overall equipment balance. Depending on the tunnel operation requirements, guide columns can be positioned before and after the supports or distributed among multiple rows of telescopic support columns to ensure both stability and flexibility of the equipment.

[0004] The modular support system, through the introduction of guide columns, solves the problem of slippage and tipping of traditional support equipment in uneven roadways, significantly improving the safety and economy of the support system. Its modular design facilitates adjustment, adapting to the support needs of different roadways and reducing equipment replacement and adjustment costs. The optimized distribution of guide columns enhances the stress distribution of the equipment, ensuring its stability and reliability even under high-load operations. This technology has broad application prospects in mining, roadway support, and other fields, and is particularly suitable for environments with complex geological conditions or limited operating space.

[0005] Figure 1A schematic diagram of the bottom structure of the dual-support column assembly is shown. Figure 2 The diagram shows the bottom structure of a single-support column assembly. It can be seen that the rectangular base design used in existing row supports primarily focuses on preventing the support from sinking and adhering to the surrounding rock floor, but fails to adequately consider providing precise positioning for the support assembly. In current designs, the base 1 is generally quite short, approximately 200 mm, mainly to ensure that the support column 2 and guide column 3 remain vertically aligned with the base 1 when connected by fixing pins. However, due to the short base 1 and the large gap between it and the support column 2 and guide column 3, precise control of the fixing pins during insertion is impossible, thus affecting the stability of the support assembly.

[0006] This design, with its large gaps and short control length, makes the support components prone to back-and-forth swaying after the base is installed. This causes the overall structure to easily change from a rectangle to a parallelogram, resulting in an unstable structure accompanied by lateral flipping and sliding. While this design allows the base to adapt to terrain changes and fit irregular ground to some extent, the frequent twisting can easily cause the fixing pins to bend during operation, or even the column heads of the support columns to break, affecting the overall stability and safety of the bracket.

[0007] To address the above issues, it is necessary to optimize the base design and improve the stability of the base connection. Utility Model Content

[0008] The main purpose of this utility model is to provide a double-support column base and a single-support column base suitable for height-increasing row brackets, so as to solve the problem of low stability of the base structure of row brackets in the prior art.

[0009] To achieve the above objectives, according to one aspect of the present invention, a double support column base suitable for height-increasing row brackets is provided, comprising a base body, a guide column connecting portion connected to a guide column formed in the middle of the base body, and support column connecting portions connected to two support columns respectively formed on both sides of the base body, characterized in that the support column connecting portions are raised to form a plug-in structure, the plug-in structure being used to insert the end of the support column.

[0010] Furthermore, the double support column base includes at least one support column fixing pin, and the plug-in structure has at least one pair of plug holes that cooperate with the support column fixing pin. The support column fixing pin passes through the end of the support column and cooperates with the plug holes to fix the support column.

[0011] Furthermore, the support column has two fixing pins and two pairs of insertion holes. The projections of the two pairs of insertion holes on the horizontal plane are arranged in a cross shape and are staggered in the height direction.

[0012] Furthermore, the dual-support column base also includes a pad, which is set at the bottom of the plug-in structure.

[0013] Furthermore, the support column connection portion is raised relative to the guide column connection portion to form a plug-in structure, or the support column connection portion and the guide column connection portion are raised together to the same height to form a plug-in structure in the support column connection portion.

[0014] To achieve the above objectives, according to one aspect of the present invention, a single support column base suitable for height-adjustable row supports is provided, comprising a base body, wherein a support column connecting portion connected to a support column is formed on the base body, the support column connecting portion is raised to form a plug-in structure, the plug-in structure being used to insert the end of the support column.

[0015] Furthermore, the single support column base includes at least one support column fixing pin, and the plug-in structure has at least one pair of plug holes that cooperate with the support column fixing pin. The support column fixing pin passes through the end of the support column and cooperates with the plug holes to fix the support column.

[0016] Furthermore, the support column has two fixing pins and two pairs of insertion holes. The projections of the two pairs of insertion holes on the horizontal plane are arranged in a cross shape and are staggered in the height direction.

[0017] Furthermore, the single support column base also includes a pad, which is set at the bottom of the plug-in structure.

[0018] Furthermore, a support column connection is formed in the middle of the base, and guide column connection parts connected to two guide columns are formed on both sides of the base. The support column connection part is higher than the guide column connection part to form an insertion structure, or the support column connection part and the guide column connection part are raised to the same height to form an insertion structure in the support column connection part.

[0019] By applying the technical solution of this utility model, a plug-in structure is formed by raising the connection part of the support column, which significantly improves the stability of the connection between the support column and the base. The plug-in structure provides a deeper insertion depth, allowing the end of the support column to be deeply inserted, thereby reducing the gap between the support column and the base, avoiding lateral sliding and back-and-forth swaying, and ensuring that each support component can stably maintain a vertical position when the support is running on an uneven surrounding rock base. This design effectively avoids the instability of the support due to sliding or overturning, and at the same time greatly reduces the stress concentration of the fixing pin, extending its service life.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 A schematic diagram of the bottom structure of a dual-support column support assembly in the prior art is shown;

[0023] Figure 2 The diagram shows the bottom structure of a single support column support assembly in the prior art;

[0024] Figure 3 A schematic diagram of a first embodiment of a double-support column base suitable for a height-adjustable row support is shown;

[0025] Figure 4 It shows Figure 3 A cross-sectional structural diagram of a support column connection part of a double support column base;

[0026] Figure 5 It shows Figure 3 A cross-sectional view of another support column connection part of the double support column base;

[0027] Figure 6 A schematic diagram of a second embodiment of the double-support column base for a height-adjustable row support according to the present invention is shown;

[0028] Figure 7 A schematic diagram of a third embodiment of the single support column base for a height-adjustable row support according to the present invention is shown;

[0029] Figure 8 A schematic diagram of a fourth embodiment of the single support column base for a height-adjustable row support according to the present invention is shown. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Figure 3 This is an embodiment of the present invention of a double support column base applicable to a height-increasing row bracket. The double support column base includes a base body, a guide column connecting part 10 connected to a guide column is formed in the middle of the base body, and support column connecting parts 20 connected to two support columns are formed on both sides of the base body. The support column connecting parts 20 are raised to form a plug-in structure 21, which is used to insert the end of the support column.

[0035] By applying the technical solution of this utility model, a plug-in structure 21 is formed by raising the support column connection part 20 of the double support column base, which significantly improves the stability of the connection between the support column and the base. The plug-in structure 21 provides a deeper plug-in depth, allowing the end of the support column to be deeply inserted, thereby reducing the gap between the support column and the base, avoiding lateral sliding and back-and-forth swaying, and ensuring that each support component can stably maintain a vertical position when the support is running on an uneven surrounding rock base. This design effectively avoids the instability of the support due to sliding or overturning, and at the same time greatly reduces the stress concentration of the fixing pin, extending its service life.

[0036] This invention improves the positioning reference function of the base and support column, preventing them from sliding backward, left, right, or lateral. Specifically, this is achieved by increasing the height of the support column connection to form a plug-in structure 21, allowing the support column or guide column to be deeply inserted into the plug-in structure 21 of the base. Optionally, the plug-in structure 21 is a groove; in a specific embodiment, it can be a square groove. Alternatively, it can be a circular groove. In a specific embodiment, the depth of the plug-in structure 21 is at least 2-3 times the depth of the mounting holes for the support column or guide column in the existing base. The mounting holes for the support column or guide column in the existing base are relatively shallow and are only used to connect the support column or guide column via connectors.

[0037] More preferably, the dimensions of the plug-in structure 21 should correspond to the dimensions of the end of the support column, thereby helping to reduce the gap. This increased positioning height of the plug-in structure 21 minimizes the lateral sway of the fixed support column. When the support walks on uneven rock surfaces, all support components fall vertically and are fixed in position, eliminating small-distance sliding and flipping. This significantly improves the stability of the support, preventing lateral swaying and the overlapping of the rear and front bases during forward movement. It should be noted that "the dimensions of the plug-in structure 21 should correspond to the dimensions of the end of the support column" means that the end of the support column and the plug-in structure 21 form a clearance fit or an interference fit.

[0038] In contrast, such as Figure 4As shown, in a preferred embodiment, the double-support column base in Example 1 includes at least one support column fixing pin 30. The insertion structure 21 has at least one pair of insertion holes 211 that mate with the support column fixing pin 30. The support column fixing pin 30 passes through the end of the support column and engages with the insertion holes 211 to fix the support column. By forming insertion holes 211 on the insertion structure 21 that mate with the support column fixing pin 30, and fixing the fixing pin 30 by passing through the end of the support column and the insertion holes 211, the connection stability between the support column and the base is further enhanced. The addition of the support column fixing pin 30 effectively prevents the support column from slipping or wobbling out of its original position in the insertion structure, ensuring the reliability of the support column during operation. Simultaneously, the precise fit between the insertion holes 211 and the support column fixing pin 30 makes the support column easy to install, flexible to disassemble, and convenient for maintenance and replacement. Because the support column connecting part 20 is raised to form the insertion structure 21, in certain special cases, the support column within the insertion structure 21 can be lifted upwards to a certain height, and at least one support column fixing pin 30 can be inserted laterally to fix the support column. The position of the support column is raised, and the height of the support structure is also increased. The significance of this is that, sometimes, the surrounding rock at the top of the working face unexpectedly rises, or the surrounding rock at the bottom falls, causing the support structure to lose contact with the roof and become unusable. In such cases, replacing the support column with a higher one, inserting square timber above the support's top beam to fill the gap, or placing wooden blocks under the base are all cumbersome, time-consuming, labor-intensive, and sometimes even dangerous, as these makeshift solutions can cause instability in the support structure. By using the support column fixing pin 30 and the insertion hole 211 structure in conjunction, the height of the support structure can be changed in the shortest possible time, thus effectively solving this problem.

[0039] Optionally, the raised insertion structure 21 can be formed by welding four raised side plates onto the base plate of the original base. The groove formed by the four side plates creates the insertion structure 21, which is square. If thick-walled steel pipes are used and welded to the base plate, a circular groove insertion structure 21 will be formed. In normal use, after placing the support column, inserting the support column fixing pin 30 will secure it and allow it to be used. The original base's front-to-back and left-to-right twisting phenomena will completely disappear.

[0040] More preferably, such as Figure 4As shown, there are two support column fixing pins 30 and two pairs of insertion holes 211. The projections of the two pairs of insertion holes 211 on the horizontal plane form a cross shape and are staggered in the vertical direction. By setting two support column fixing pins 30 and two pairs of insertion holes 211, and making the insertion holes 211 cross-shaped on the horizontal plane and staggered in the vertical direction, the fixing method between the support column and the base is further optimized. This design significantly improves the stability of the support column in multiple directions, especially under lateral and longitudinal forces, and can better distribute stress, preventing the support column from rotating or tilting. The cross-shaped distribution of the support column fixing pins 30 enhances the torsional resistance of the connection point, while the staggered setting in the vertical direction avoids the stress concentration problem of the fixing pins on the same plane, thereby reducing the risk of deformation or breakage of the fixing pins due to long-term use.

[0041] like Figure 5 As shown, in a preferred embodiment, the double support column base in Example 1 further includes a pad 40, which is disposed at the bottom of the insertion structure 21. The pad 40 at the bottom of the insertion structure 21 effectively improves the load-bearing capacity and stability of the support column and the base. The addition of the pad 40 distributes the pressure generated by the support column, preventing the pressure from being completely transmitted to the side plate of the insertion structure, thereby reducing the risk of deformation or damage to the side plate and the insertion structure related to the support column fixing pin 30 due to prolonged pressure. Simultaneously, the pad 40 provides a more stable support surface for the support column, further reducing the swaying or displacement of the support column in the insertion structure.

[0042] The above method uses the support column fixing pin 30 to bear the support force, but the support column fixing pin 30 is prone to bending after long-term use. Therefore, as a more preferred embodiment, a pre-manufactured pad 40 can be placed at the bottom of the plug-in structure 21, so that the support column is pressed on the pad 40 after being inserted into the plug-in structure 21, and the pad 40 bears the working pressure of the support column. Optionally, the pad 40 can be a square pad 40.

[0043] More preferably, in the above embodiment, the support column fixing pin 30 can also be used at the same time as the pad block 40, so that the support column fixing pin 30 only bears the weight of the support column base itself when it is lifted.

[0044] The above-described methods can temporarily or temporarily raise the scaffolding, which is very useful for coping with sudden changes in roof height during special periods. It avoids workers having to climb onto the scaffolding to place timber or wooden blocks under the base. Because of the added support blocks, the scaffolding can operate at full load under normal conditions. The support blocks can be removed when the roadway lowers, thus enabling the scaffolding to adjust its height to support the roof in special circumstances.

[0045] In the technical solution of Embodiment 1, the support column connecting part 20 is raised relative to the guide column connecting part 10 to form the insertion structure 21. It should be noted that "raising the support column connecting part 20 relative to the guide column connecting part 10" includes two implementable structures. The first implementable structure is that the guide column connecting part 10 maintains the same height as in the prior art, and only the support column connecting part 20 is raised. The second implementable structure is that the guide column connecting part 10 is also raised compared to the same height in the prior art, but the height of the support column connecting part 20 is higher than that of the guide column connecting part 10. In the second implementable structure, the higher guide column connecting part 10 can also provide a better fixing effect for the guide column.

[0046] As a double-support column base that can also be implemented, such as Figure 6 As shown, this utility model also provides a second embodiment of a double-support column base. In the technical solution of the second embodiment, the support column connecting part 20 and the guide column connecting part 10 are raised together to the same height, forming an insertion structure 21 in the support column connecting part 20. Raising the support column connecting part 20 and the guide column connecting part 10 together and forming an insertion structure 21 in the support column connecting part 20 significantly enhances the connection strength and stability between the support column and the base.

[0047] like Figure 7 As shown, this utility model also provides a third embodiment of a single support column base suitable for a height-adjustable scaffold, including a base body with a support column connecting portion 20 formed on the base body, which is connected to the support column. The support column connecting portion 20 is raised to form a plug-in structure 21, which is used to insert the end of the support column. Similarly, by raising the support column connecting portion 20 to form the plug-in structure 21, the stability of the connection between the support column and the base is significantly improved. The plug-in structure 21 provides a deeper insertion depth, allowing the end of the support column to be deeply inserted, thereby reducing the gap between the support column and the base, avoiding lateral sliding and back-and-forth swaying, and ensuring that each support component can stably maintain a vertical position when the scaffold is running on an uneven surrounding rock base. This design effectively avoids the instability of the scaffold caused by sliding or overturning, and at the same time greatly reduces the stress concentration of the fixing pin, extending its service life.

[0048] In the technical solution of Embodiment 3, the relevant structural principles of the plug-in structure 21, the support column fixing pin 30 and the pad 40 are the same as those in Embodiment 1, and will not be repeated here.

[0049] like Figure 8As shown, this utility model also provides a fourth embodiment of a single support column base suitable for a height-adjustable row support. The difference between the fourth and third embodiments is that a support column connecting part 20 is formed in the middle of the base, and guide column connecting parts 10 connected to two guide columns are formed on both sides of the base. The support column connecting part 20 is raised relative to the guide column connecting part 10 to form an insertion structure 21. Similarly, it should be noted that "the support column connecting part 20 is raised relative to the guide column connecting part 10" includes two feasible structures. The first feasible structure is that the guide column connecting part 10 maintains the same height as in the prior art, and only the support column connecting part 20 is raised. The second feasible structure is that the guide column connecting part 10 is also raised compared to the same height in the prior art, but the height of the support column connecting part 20 is higher than that of the guide column connecting part 10. In the second feasible structure, the higher guide column connecting part 10 can also provide a better fixing effect for the guide column.

[0050] As another embodiment not shown in the figure, the support column connector 20 and the guide column connector 10 may be raised together to the same height to form the insertion structure 21 in the support column connector 20.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-support column base suitable for height-increasing brackets, comprising a base body, wherein a guide column connecting portion (10) connected to a guide column is formed in the middle of the base body, and support column connecting portions (20) connected to two support columns are respectively formed on both sides of the base body, characterized in that, The support column connecting part (20) is raised to form a plug-in structure (21), which is used to insert the end of the support column.

2. The double-support column base for a height-increasing row of brackets according to claim 1, characterized in that, The dual support column base includes at least one support column fixing pin (30), and the plug structure (21) has at least one pair of plug holes (211) that cooperate with the support column fixing pin (30). The support column fixing pin (30) passes through the end of the support column and cooperates with the plug holes (211) to fix the support column.

3. The double-support column base for a height-adjustable row support as described in claim 2, characterized in that, There are two support column fixing pins (30) and two pairs of insertion holes (211). The two pairs of insertion holes (211) are distributed in a cross shape on the horizontal plane and are staggered in the height direction.

4. The double-support column base for a height-adjustable row support as described in claim 1, characterized in that, The dual support column base also includes a pad (40), which is disposed at the bottom of the plug-in structure (21).

5. The double-support column base for a height-adjustable row support as described in claim 1, characterized in that, The support column connection part (20) is raised relative to the guide column connection part (10) to form the plug-in structure (21), or the support column connection part (20) and the guide column connection part (10) are raised together to the same height to form the plug-in structure (21) in the support column connection part (20).

6. A single support column base suitable for height-adjustable multi-tiered brackets, comprising a base body, wherein a support column connecting portion (20) connected to a support column is formed on the base body, characterized in that, The support column connecting part (20) is raised to form a plug-in structure (21), which is used to insert the end of the support column.

7. The single support column base for a height-adjustable row of brackets according to claim 6, characterized in that, The single support column base includes at least one support column fixing pin (30), and the plug structure (21) has at least one pair of plug holes (211) that cooperate with the support column fixing pin (30). The support column fixing pin (30) passes through the end of the support column and cooperates with the plug holes (211) to fix the support column.

8. The single support column base for a height-adjustable row of brackets according to claim 7, characterized in that, There are two support column fixing pins (30) and two pairs of insertion holes (211). The two pairs of insertion holes (211) are distributed in a cross shape on the horizontal plane and are staggered in the height direction.

9. The single support column base for a height-adjustable row of brackets according to claim 6, characterized in that, The single support column base also includes a pad (40), which is disposed at the bottom of the plug-in structure (21).

10. The single support column base for a height-adjustable row support as described in claim 6, characterized in that, The support column connection part (20) is formed in the middle of the seat body, and the guide column connection parts (10) connected to the two guide columns are formed on both sides of the seat body. The support column connection part (20) is raised relative to the guide column connection part (10) to form the plug-in structure (21), or the support column connection part (20) and the guide column connection part (10) are raised together to the same height to form the plug-in structure (21) in the support column connection part (20).

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