Tool for testing shear strength of junction surface of concrete mold and concrete

Abstract

The utility model discloses a tool for testing the shear strength of a junction surface of a concrete mold and concrete. The tool comprises a first mounting seat and a second mounting seat, the two sets of first pressing blocks are provided with first surfaces used for making contact with post-pouring concrete, and the two sets of first pressing blocks are arranged on the first mounting base and can move oppositely or oppositely in the first direction; the first mounting base and the second mounting base can move relatively or oppositely in the second direction, and the second direction is perpendicular to the first direction; the two sets of second pressing blocks are provided with second surfaces used for making contact with the concrete mold, the two sets of second pressing blocks are arranged on the second mounting base, and the two sets of second pressing blocks can move oppositely or oppositely in the first direction; in the first direction, the outer side edge of the first surface can be aligned with the inner side edge of the second surface in the second direction. The testing tool can improve the accuracy of shear strength measurement of the junction surface of the concrete mold and the post-poured concrete.

Description

Technical Field

[0001] The utility model relates to the field of concrete performance testing, in particular to a tool for testing the shear strength of the interface between a concrete mould and concrete. Background Art

[0002] In the prior art, the production process of precast concrete components requires first setting up a mold, pouring concrete in the mold, and then dismantling the mold after curing for a preset period of time to obtain the precast concrete components. In the above production process, the cost of installing and disassembling the mold is relatively high.

[0003] The technical solution provides a 3D printing technology that eliminates the need for formwork removal in concrete. The mold is first printed using 3D concrete printing technology. Once the mold structure is stable, concrete is poured into the mold. Because the mold itself is made of concrete, it becomes part of the precast concrete component after pouring, eliminating the need for formwork removal.

[0004] In the above-mentioned precast concrete components, the shear strength of the interface between the 3D printed mold and the post-cast concrete has a great influence on the strength and stability of the precast concrete components. Since the 3D printing mold preparation is relatively advanced, the existing technology has not yet involved testing tooling for the shear strength of this product. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a shear strength test tool for the interface between a concrete mold and concrete, which can improve the accuracy of shear strength measurement of the interface between a concrete mold and post-cast concrete.

[0006] The utility model also provides a test tool for the shear strength of the interface between a concrete mold and concrete, comprising:

[0007] a first mounting seat;

[0008] Two groups of first pressing blocks each having a first surface for contacting post-cast concrete, the two groups of first pressing blocks being disposed on the first mounting seat and capable of moving relative to or away from each other along a first direction;

[0009] a second mounting seat, wherein the first mounting seat and the second mounting seat are capable of moving relative to or away from each other along a second direction, wherein the second direction is perpendicular to the first direction;

[0010] Two groups of second pressing blocks each having a second surface for contacting the concrete mold, the two groups of second pressing blocks being disposed on the second mounting seat, and the two groups of second pressing blocks being capable of moving relative to or away from each other along the first direction;

[0011] Wherein, along the first direction, two groups of the first pressing blocks can be distributed between two groups of the second pressing blocks, and the outer edge of the first surface and the inner edge of the second surface can be aligned along the second direction.

[0012] In some embodiments, an outer edge of the first surface and an inner edge of the second surface both extend along a third direction, and the third direction is perpendicular to the second direction and the first direction.

[0013] In some embodiments, the first pressing block and the second pressing block each include a pressing block body and a pressing strip protruding from the pressing block body along the second direction, and the pressing strip is located in the middle of the pressing block body along the first direction.

[0014] In some embodiments, the bead is a rectangular bar extending along the third direction.

[0015] In some embodiments, the width of the pressure strip away from the surface of the pressure block body along the first direction is 5 mm-10 mm.

[0016] In some embodiments, the pressing block body and the pressing strip are integrally formed.

[0017] In some embodiments, the first mounting seat and the second mounting seat have length scales arranged along a first direction, and the length scale of the first mounting seat is aligned with the length scale of the second mounting seat along a second direction;

[0018] The first pressing block and the second pressing block have zero scale lines that match the length scale. Along the second direction, the zero scale line of the first pressing block is aligned with the outer edge of the first surface, and the zero scale line of the second pressing block is aligned with the inner edge of the second surface.

[0019] In some embodiments, the length scale is distributed at both ends of the first mounting seat along the third direction and at both ends of the second mounting seat along the third direction.

[0020] In some embodiments, the joint surface shear strength test fixture includes a slider and a fastener, the first mounting seat and the second mounting seat are provided with a slide groove extending along the first direction, and the slider is slidably disposed in the slide groove;

[0021] Some of the fasteners are used to fasten the first pressure block and the slider to fix the first pressure block to the first mounting seat, or unlock the first pressure block so that the first pressure block can move along the slide groove; some of the fasteners are used to fasten the second pressure block and the slider to fix the second pressure block to the second mounting seat, or unlock the second pressure block so that the second pressure block can move along the slide groove.

[0022] In some embodiments, a first joint is provided on the side of the first mounting seat facing away from the first pressure block, and a second joint is provided on the side of the second mounting seat facing away from the second pressure block. The first joint and the second joint have a column protruding along the second direction, and the column is used to position and connect with the pressure equipment.

[0023] The test fixture for the shear strength of the interface between a concrete mold and concrete according to the embodiment of the utility model has at least the following beneficial effects:

[0024] Along the first direction, the two groups of first pressing blocks can be distributed between the two groups of second pressing blocks. The two groups of first pressing blocks are used to press on the post-cast concrete and can move relative to or away from each other along the first direction to adjust the spacing between the two groups of first pressing blocks. During the pressure detection process, the spacing between the two groups of first pressing blocks cannot act on the middle part of the post-cast concrete along the first direction. Therefore, it can greatly avoid the bending and deformation of the middle part of the post-cast concrete, which causes the bonding surface to separate along the first direction and affect the detection results. By moving the two groups of first pressing blocks along the first direction, the outer edge of the surface of one group of first pressing blocks is located on the bonding surface on one side of the first direction, and the outer edge of the surface of the other group of first pressing blocks is located on the bonding surface on the other side of the first direction. By moving the two groups of second pressing blocks along the first direction, the inner edge of the surface of one group of second pressing blocks is located on the bonding surface on one side of the first direction, and the inner edge of the surface of the other group of second pressing blocks is located on the bonding surface on the other side of the first direction. During the testing process, the two groups of first pressing blocks and the two groups of second pressing blocks move relative to each other along the second direction, so that the outer edges of the above-mentioned surfaces of the first pressing blocks and the inner edges of the above-mentioned surfaces of the second pressing blocks can act on the bonding surface at the same time, thereby accurately measuring the shear strength of the bonding surface.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic structural diagram of a test fixture for the shear strength of the interface between a concrete mold and concrete according to an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the testing state of the test tool for the shear strength of the interface between the concrete mold and concrete according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 10. First mounting seat; 10a. Slide groove; 20. First pressure block; 20a. First surface; 21. Pressure block body; 22. Pressure strip; 30. Second mounting seat; 31. Length scale; 40. Second pressure block; 40a. Second surface; 50. Slider; 60. First joint; 70. Second joint; 100. Concrete mold; 200. Post-cast concrete. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] In the related art, 3D printing is used to achieve concrete formwork-free production. Specifically, the mold is first printed out using 3D concrete printing technology, and then concrete is poured into the concrete mold after the mold structure is stable. Since the 3D printed concrete mold itself has been solidified in advance, and then concrete is poured to form an integrated product, direct testing is not possible. The test fixture of the present application is used to test concrete specimens. The concrete specimen is formed by first 3D printing a concrete mold, then pouring concrete, and after curing for 28 days, it is divided to form a concrete specimen. The concrete mold of the concrete specimen has two bonding surfaces with the post-poured concrete. Since the 3D printed concrete mold is printed layer by layer, the connection between the layers is not a smooth connection, but an uneven connection structure, which may result in certain deviations in the positions of the bonding surfaces of different concrete specimens.

[0037] The prior art provides a tool for testing the shear strength of the interface between the first-cast concrete and the second-cast concrete. This tool can apply a force in a first direction to the first-cast concrete through a pressure block, and then apply a force in a second direction to the second-cast concrete through another pressure block, with the first direction being opposite to the second direction, thereby obtaining the shear strength of the interface between the first-cast concrete and the second-cast concrete. However, its structure is fixed and cannot be adjusted. In addition, the pressure blocks press on the entire surface of the concrete. During the pressure application process, when the pressure blocks are subjected to a small degree of bending deformation, the concrete will be subjected to a larger force at a position away from the interface. This force will cause the concrete interface to tend to separate or directly separate, affecting the measurement accuracy.

[0038] In this regard, an embodiment of the present application provides a test fixture for the shear strength of the interface between a concrete mold and concrete, the test fixture comprising a first mounting seat 10 , two groups of first pressing blocks 20 , a second mounting seat 30 and two groups of second pressing blocks 40 .

[0039] The first mounting base 10 provides a mounting base for the two sets of first pressing blocks 20. The second mounting base 30 provides a mounting base for the two sets of second pressing blocks 40. The first mounting base 10 and the second mounting base 30 are capable of relative movement or movement away from each other along a second direction. This allows the two sets of first pressing blocks 20 and the two sets of second pressing blocks 40 to move relative to or relative to each other. Along the second direction, the concrete mold 100 and the post-cast concrete 200 are positioned between the two sets of first pressing blocks 20 and the two sets of second pressing blocks 40.

[0040] Both sets of first pressing blocks 20 have a first surface 20a for contacting the post-cast concrete 200. The two sets of first pressing blocks 20 are capable of relative movement or movement away from each other along a first direction. The first direction is perpendicular to the second direction. It is understood that relative movement or movement away from each other along the first direction perpendicular to the second direction allows the spacing between the two sets of first pressing blocks 20 along the first direction to be adjustable.

[0041] The two sets of second pressing blocks 40 each have a second surface 40a for contacting the concrete mold 100. The two sets of second pressing blocks 40 are capable of moving relative to or away from each other in a first direction. In other words, the spacing between the two sets of second pressing blocks 40 in the first direction is adjustable. It will be appreciated that the two sets of first pressing blocks 20 are pressed against the post-cast concrete 200, and the two sets of second pressing blocks 40 are pressed against the concrete mold 100. The relative movement of the first mounting base 10 and the second mounting base 30 in the second direction transmits a force to the interface between the concrete mold 100 and the post-cast concrete 200, thereby measuring the shear strength.

[0042] Along the first direction, the two groups of first pressing blocks 20 can be distributed between the two groups of second pressing blocks 40 , and the outer edges of the first surfaces 20 a of the first pressing blocks 20 can be aligned with the inner edges of the second surfaces 40 a of the second pressing blocks 40 along the second direction.

[0043] The outer edge of the first surface 20a refers to the edge of the first surface 20a away from the other set of first pressing blocks 20, and the inner edge of the second surface 40a refers to the edge of the second surface 40a close to the other set of second pressing blocks 40. It can be understood that in the aligned state, the first pressing block 20 and the second pressing block 40 move relative to each other in the second direction, which will enable the outer edge of the first surface 20a of the first pressing block 20 and the inner edge of the second surface 40a to act on the bonding surface simultaneously, thereby effectively measuring the shear strength of the bonding surface.

[0044] In the above embodiment, along the first direction, the two groups of first pressing blocks 20 can be distributed between the two groups of second pressing blocks 40. The two groups of first pressing blocks 20 are used to press against the post-cast concrete 200 and can move relative to or away from each other along the first direction to adjust the spacing between the two groups of first pressing blocks 20. During the pressure test process, the spacing between the two groups of first pressing blocks 20 does not affect the middle portion of the post-cast concrete 200 along the first direction. This can greatly prevent the middle portion of the post-cast concrete 200 from bending and deforming, causing the bonding surface to separate along the first direction and affecting the test results.

[0045] By moving two groups of first pressing blocks 20 along a first direction, the outer edges of the surfaces of one group of first pressing blocks 20 are located on the bonding surface on one side along the first direction, while the outer edges of the surfaces of the other group of first pressing blocks 20 are located on the bonding surface on the other side along the first direction. By moving two groups of second pressing blocks 40 along a first direction, the inner edges of the surfaces of one group of second pressing blocks 40 are located on the bonding surface on one side along the first direction, while the inner edges of the surfaces of the other group of second pressing blocks 40 are located on the bonding surface on the other side along the first direction. During the testing process, the two groups of first pressing blocks 20 and the two groups of second pressing blocks 40 move relative to each other in the second direction, so that the outer edges of the surfaces of the first pressing blocks 20 and the inner edges of the surfaces of the second pressing blocks 40 can act on the bonding surface simultaneously, thereby accurately measuring the shear strength of the bonding surface.

[0046] It is understood that each group of first pressing blocks 20 includes at least one first pressing block 20, and each group of second pressing blocks 40 includes at least one second pressing block 40. In some embodiments, each group of first pressing blocks 20 includes one first pressing block 20, and each group of second pressing blocks 40 includes one second pressing block 40.

[0047] It is understandable that the extension direction of the outer edge of the first surface 20a and the inner edge of the second surface 40a is not limited, as long as they are parallel to the bonding surface, so that alignment can be achieved.

[0048] In some embodiments, the outer edge of the first surface 20a and the inner edge of the second surface 40a both extend along a third direction, which is perpendicular to the second and first directions. It will be appreciated that concrete specimens are generally manufactured as rectangular blocks having two joint surfaces that are parallel to each other. By ensuring that the outer edge of the first surface 20a and the inner edge of the second surface 40a both extend along a third direction perpendicular to the second and first directions, the outer edge of the first surface 20a and the inner edge of the second surface 40a are parallel to the two joint surfaces, thereby enabling adjustment to an aligned position.

[0049] In some embodiments, the first pressing block 20 and the second pressing block 40 each include a pressing block body 21 and a bead 22 protruding from the pressing block body 21 along a second direction. The bead 22 of the first pressing block 20 protrudes toward the second pressing block 40, and the first surface 20a of the first bead 22 is the surface of the bead 22 of the first pressing block 20 facing the second pressing block 40. The bead 22 of the second pressing block 40 protrudes toward the first pressing block 20, and the second surface 40a of the second bead 22 is the surface of the bead 22 of the second pressing block 40 facing the first pressing block 20.

[0050] Along the first direction, the bead 22 is located in the middle of the block body 21. The middle here does not refer to the geometric center, but rather to a position other than the two ends of the block body 21 along the first direction. Positions slightly to the left or right of the absolute center of the block body 21 are considered to be in the middle of the block body 21. This maintains a gap between the first surfaces 20a of the two groups of first blocks 20, and during pressure application, the reaction force is transmitted to the block body 21 via the bead 22. Because the bead 22 is located in the middle of the block body 21, the force applied to the block body 21 along the first direction is relatively uniform, preventing the block body 21 from slipping in the first direction and affecting its alignment with the mating surface.

[0051] In some embodiments, the pressing block body 21 and the pressing strip 22 are integrally formed, thereby facilitating manufacturing and improving structural stability under applied force.

[0052] In some embodiments, the bead 22 is a rectangular strip, with the long side of the bead 22 extending along the third direction. The rectangular strip structure of the bead 22 makes the first surface 20a of the first pressing block 20 and the second surface 40a of the second bead 22 rectangular, making manufacturing and molding relatively simpler.

[0053] In order to meet the pressure in the test of the bead 22, the contact area of the bead 22 on the concrete mold 100 and the post-cast concrete 200 away from the bonding surface along the first direction is reduced, and the separation tendency of the bonding surface along the first direction is further reduced. In some embodiments,

[0054] Along the first direction, the width of the first surface 20a and the second surface 40a is between 5 mm and 10 mm. Specifically, the width of the first surface 20a and the second surface 40a can be 5 mm, 7 mm or 10 mm.

[0055] In some embodiments, the first mounting seat 10 and the second mounting seat 30 have length scales 31 arranged along the first direction. The length scale 31 of the first mounting seat 10 is aligned with the length scale 31 of the second mounting seat 30 along the second direction. The first pressing block 20 and the second pressing block 40 have zero scale lines that match the length scales 31.

[0056] Specifically, the distance between the two groups of first pressing blocks 20 can be determined by the length scale 31 between the two groups of zero scale lines. When the distance between one of the two groups of first pressing blocks 20 and the two groups of second pressing blocks 40 is determined, the position of the zero scale line and the length scale 31 of the other one can be directly adjusted.

[0057] Along the first direction, the zero scale line of the first pressing block 20 is aligned with the outer edge of the first surface 20a, and the zero scale line of the second pressing block 40 is aligned with the inner edge of the second surface 40a. Thus, the distance between the two sets of zero scale lines of the two sets of first pressing blocks 20 is the distance between the outer edges of the two first surfaces 20a, and the distance between the outer edges of the two second surfaces 40a. This facilitates accurate and rapid adjustment of the relative positions of the two sets of first pressing blocks 20 and the first mounting seat 10, as well as the relative positions of the two sets of second pressing blocks 40 and the second mounting seat 30.

[0058] To facilitate reading, in some embodiments, the length scales 31 are distributed at both ends of the first mounting seat 10 along the third direction and at both ends of the second mounting seat 30 along the third direction.

[0059] The connection method between the first mounting seat 10 and the first pressing block 20 is not limited, and the connection method between the second mounting seat 30 and the second pressing block 40 is not limited.

[0060] In some embodiments, the test fixture includes a slider 50 and a fastener. A slide groove 10 a extending along a first direction is defined on the first mounting seat 10 and the second mounting seat 30 , and the slider 50 is slidably disposed in the slide groove 10 a .

[0061] Some fasteners are used to fasten the first pressing block 20 and the slider 50 to secure the first pressing block to the first mounting seat 10, or to unlock the first pressing block 20 to allow it to move along the slide groove 10a. Some fasteners are used to fasten the second pressing block 40 and the slider 50 to secure the second pressing block to the second mounting seat 30, or to unlock the second pressing block 40 to allow it to move along the slide groove 10a.

[0062] In this way, when the first pressing block 20 or the second pressing block 40 needs to be moved, the relative position of the first pressing block 20 and the first mounting seat 10, or the relative position of the second pressing block 40 and the second mounting seat 30 can be adjusted by unlocking the fasteners. After the adjustment is in place, the first pressing block 20 is fastened to the first mounting seat 10, or the second pressing block 40 is fastened to the second mounting seat 30, by the fasteners, to prevent the first pressing block 20 or the second pressing block 40 from being displaced in the first direction during the test pressure application process.

[0063] In order to facilitate the installation of the first mounting base 10 and the second mounting base 30, in some embodiments, a first joint 60 is provided on the side of the first mounting base 10 facing away from the first pressing block 20, and a second joint 70 is provided on the side of the second mounting base 30 facing away from the second pressing block 40. The first joint 60 and the second joint 70 have columns protruding along the second direction, and the columns are used to position and connect with the pressure equipment.

[0064] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. In addition, the embodiments of the present invention and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A shear strength test tool for the interface between a concrete mold and concrete, characterized in that: include: a first mounting seat; Two groups of first pressing blocks each having a first surface for contacting post-cast concrete, the two groups of first pressing blocks being disposed on the first mounting seat and capable of moving relative to or away from each other along a first direction; a second mounting seat, wherein the first mounting seat and the second mounting seat are capable of moving relative to or away from each other along a second direction, wherein the second direction is perpendicular to the first direction; Two groups of second pressing blocks each having a second surface for contacting the concrete mold, the two groups of second pressing blocks being disposed on the second mounting seat, and the two groups of second pressing blocks being capable of moving relative to or away from each other along the first direction; Wherein, along the first direction, two groups of the first pressing blocks can be distributed between two groups of the second pressing blocks, and the outer edge of the first surface and the inner edge of the second surface can be aligned along the second direction.

2. The shear strength testing tool for the interface between concrete mold and concrete according to claim 1, characterized in that: An outer edge of the first surface and an inner edge of the second surface both extend along a third direction, and the third direction is perpendicular to the second direction and the first direction.

3. The shear strength testing tool for the interface between concrete mold and concrete according to claim 2, characterized in that: The first pressing block and the second pressing block each include a pressing block body and a pressing strip protruding from the pressing block body along the second direction. Along the first direction, the pressing strip is located in the middle of the pressing block body.

4. The shear strength testing tool for the interface between concrete mold and concrete according to claim 3, characterized in that: The pressure strip is a rectangular strip and extends along the third direction.

5. The shear strength testing tool for the interface between concrete mold and concrete according to claim 4, characterized in that: The width of the pressure strip along the first direction, which is away from the surface of the pressure block body, is 5 mm to 10 mm.

6. The shear strength testing tool for the interface between concrete mold and concrete according to claim 3, characterized in that: The pressing block body and the pressing strip are integrally formed.

7. The shear strength testing tool for the interface between concrete mold and concrete according to claim 1, characterized in that: The first mounting seat and the second mounting seat have length scales arranged along a first direction, and the length scale of the first mounting seat is aligned with the length scale of the second mounting seat along a second direction; The first pressing block and the second pressing block have zero scale lines that match the length scale. Along the second direction, the zero scale line of the first pressing block is aligned with the outer edge of the first surface, and the zero scale line of the second pressing block is aligned with the inner edge of the second surface.

8. The shear strength testing tool for the interface between concrete mold and concrete according to claim 7, characterized in that: The length scales are distributed at two ends of the first mounting seat along the third direction and at two ends of the second mounting seat along the third direction.

9. The shear strength testing tool for the interface between concrete mold and concrete according to any one of claims 1 to 8, characterized in that: The joint surface shear strength test fixture includes a slider and a fastener, the first mounting seat and the second mounting seat are provided with a slide groove extending along a first direction, and the slider is slidably arranged in the slide groove; Some of the fasteners are used to fasten the first pressing block and the sliding block to fix the first pressing block to the first mounting seat, or to unlock the first pressing block so that the first pressing block can move along the sliding groove; Some of the fasteners are used to fasten the second pressing block and the sliding block to fix the second pressing block to the second mounting seat, or to unlock the second pressing block so that the second pressing block can move along the sliding groove.

10. The shear strength testing tool for the interface between concrete mold and concrete according to any one of claims 1 to 8, characterized in that: A first joint is provided on the side of the first mounting seat away from the first pressure block, and a second joint is provided on the side of the second mounting seat away from the second pressure block. The first joint and the second joint have a column protruding along the second direction, and the column is used to position and connect with the pressure equipment.

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