Steel-wood combined keel

Abstract

The utility model discloses a steel and wood combined keel, which belongs to the technical field of building materials and comprises an outer keel and an inner keel inserted in the outer keel, the outer keel is a square tube or a rectangular tube, and at least two surfaces of the outer keel are provided with a plurality of pairs of arched supports along the length direction; every two adjacent arched supports located on the same face are spaced through a regular arched support or an inverted arched support, and the regular arched supports and the inverted arched supports are in butt joint to form an integrated structure so that each pair of arched supports can be in butt joint to form a hollow circle. According to the steel-wood combined keel, at least two surfaces of the outer keel form a structure of a plurality of arched bridges, so that the loading force of the outer keel is increased, the outer keel is prevented from being distorted and deformed, and the service life of the steel-wood combined keel is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of building materials and relates to a steel-wood combined keel. Background Art

[0002] Steel-wood keels are mainly composed of steel outer keels and wooden inner keels that run through the outer keels. They are building materials that play a supporting role in construction projects, mainly supporting concrete formwork. Currently, the most common ones are two-hole steel-wood keels and four-hole steel-wood keels.

[0003] The two-sided steel-wood keel has multiple long holes on the two opposite sides (side walls) of the outer keel. It has strong load capacity, but it is not suitable for use in the inner corners because it is inconvenient to nail. It is usually used on the top plate and wall board. In addition, compared with the four-sided outer keel, it is heavy.

[0004] The four-hole steel-wood keel has multiple long holes on the four sides (side walls) of the outer keel. It is light in weight and easy to nail. It can be used on the top plate, wall panel and inner corners. However, compared with the two-hole outer keel, the load capacity is small. After the outer keel is unfolded circumferentially, the long holes on the four sides are located in the same straight line, and a slender isolation zone is formed on both sides of the long holes, which makes the outer keel easy to twist and deform.

[0005] In addition, therefore, it is necessary to provide a steel-wood composite keel that is not easily distorted and has a large load. Utility Model Content

[0006] In order to at least solve the problem that the outer keel of the four-sided steel-wood keel in the prior art is easy to twist and deform, the utility model provides the following technical solutions: a steel-wood combined keel, the steel-wood combined keel comprises: an outer keel and an inner keel inserted in the outer keel, the outer keel is a square tube or a rectangular tube, and at least two surfaces of the outer keel are provided with multiple pairs of arch supports along the length direction;

[0007] Two adjacent arch supports located on the same plane are spaced apart by a positive arch support or an inverted arch support, and the positive arch support and the inverted arch support are butted together to form an integrated structure so that each pair of arch supports are butted together to form a hollow circle.

[0008] Optionally, in the above-mentioned steel-wood composite keel, the outer keel is provided with two hollow circles, and the hollow circles on the same surface are consistent in size and corresponding in position to the hollow circles on the opposite surface.

[0009] Optionally, in the above-mentioned steel-wood composite keel, the outer keel is provided with four or three hollow circles, and the hollow circles on the same surface are all of the same size and corresponding position as the hollow circles on the opposite surface;

[0010] The projection of the center of any hollow circle on the adjacent surface falls on the center line of the regular arch support or the inverted arch support in the length direction.

[0011] Optionally, in the above-mentioned steel-wood composite keel, the minimum widths of the positive arch support and the inverted arch support are both smaller than the diameter of the hollow circle.

[0012] Optionally, in the above-mentioned steel-wood composite keel, the distances between the two ends of the outer keel and the hollow circle adjacent to the end of the outer keel are not less than 20 mm.

[0013] Optionally, in the above-mentioned steel-wood composite keel, the inner keel is a wooden square, the outer side wall of the inner keel is tightly fitted with the inner side wall of the outer keel, and the length of the inner keel is smaller than the length of the outer keel.

[0014] Optionally, in the above-mentioned steel-wood composite keel, the steel-wood composite keel further comprises: a plug cover;

[0015] The plugging cover is inserted at both ends of the outer keel, and the plugging cover is detachably connected to the outer keel through a connecting piece.

[0016] Optionally, in the above-mentioned steel-wood composite keel, the plug cover is concave, the open end of the plug cover faces the inner keel, the size of the plug cover matches the size of the outer keel, and the open end of the plug cover abuts against the end of the inner keel; or

[0017] Both ends of the inner keel have protrusions for being inserted into the grooves of the plug cover.

[0018] Optionally, in the above-mentioned steel-wood composite keel, the corners of the plug cover match the inner R angle of the outer keel;

[0019] The plug cover is provided with an observation hole.

[0020] Optionally, in the above-mentioned steel-wood composite keel, the plug cover is arranged flush with the outer keel pipe opening.

[0021] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0022] In the present application, multiple pairs of arch supports are provided along the length direction on at least two surfaces of the outer keel, and two adjacent arch supports on the same surface are separated by positive arch supports or inverted arch supports, thereby forming a structure of multiple arch bridges, thereby increasing the load capacity of the outer keel, avoiding twisting and deformation of the outer keel, and improving the service life of the steel-wood composite keel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a steel-wood composite keel provided in an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the position of the arch support on the outer keel of a steel-wood composite keel provided in an embodiment of the utility model;

[0025] Figure 3 for Figure 2 Schematic diagram of the combined state of each pair of arch supports;

[0026] Figure 4 for Figure 1 Schematic diagram of the unfolded structure of the middle and outer keels (hollow circles on both sides);

[0027] Figure 5 for Figure 1 Schematic diagram of the unfolded structure of the inner and outer keels (hollow circles on four sides);

[0028] Figure 6 for Figure 1 Schematic diagram of the unfolded structure of the middle and outer keels (three hollow circles);

[0029] Figure 7 for Figure 1 Schematic diagram of the specific structure of the middle plug cover;

[0030] Figure 8 for Figure 1 Schematic diagram of the connection structure between the inner and outer keels and the plug cover;

[0031] Fig. 9 It is a structural schematic diagram of a double-faced steel-wood keel in the prior art;

[0032] Fig.10 It is a structural schematic diagram of a four-hole steel-wood keel in the prior art;

[0033] In the figure: 1, outer keel; 101, arch support; 102, positive arch support; 103, inverted arch support; 104, hollow circle; 2, inner keel; 3, plug cover; 301, observation hole; 4, connecting piece; L represents the distance between the end of the outer keel and the hollow circle adjacent to the end of the outer keel. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] See also Figure 1-8 The utility model provides the following technical solutions: A steel-wood composite keel, comprising: an outer keel 1 and an inner keel 2 inserted into the outer keel 2, the outer keel 1 is made of steel material, preferably a square tube or a rectangular tube. The inner keel 2 is a wooden square that matches the shape of the outer keel 1. After assembly, the outer wall of the inner keel 2 fits tightly with the inner wall of the outer keel 1, so that the load capacity of the steel-wood composite keel can be guaranteed. At least two sides (that is, two sides, three sides and four sides) of the outer keel 1 are provided with multiple pairs of arch supports 101 along the length direction. Refer to Figure 2 As shown, two adjacent arch supports 101 located on the same surface are spaced by a positive arch support 102 or an inverted arch support 103, and the positive arch support 102 and the inverted arch support 103 are connected to form an integrated structure, so that each pair of arch supports 101 can be connected to form a hollow circle 104 (referring to a positive circular through hole in the steel plate that penetrates the outer keel 1). At the same time, the integrated structure makes the hollow circles 104 on the same surface arranged at intervals, that is, each pair of arch supports 101 are mirror-arranged about the center line of the short side of the surface, that is, each arch support 101 is bent toward the long side of the surface, so that the positive arch support 102 and the inverted arch support 103 respectively support the arch supports 101 on both sides of each other, forming a structure of multiple arch bridges arranged at intervals, thereby increasing the load capacity of the outer keel 1, avoiding distortion of the outer keel 1, and improving the service life of the steel-wood composite keel.

[0037] The following is an introduction to the specific structure of the two-sided, three-sided or four-sided hollow circular outer keel:

[0038] Embodiment 1

[0039] Reference Figure 4As shown, in this embodiment, the outer keel 1 is provided with two hollow circles 104. Specifically, the hollow circles 104 on the same surface are consistent in size and position with the hollow circles 104 on the opposite surface, that is, the outer keel 1 is provided with hollow circles 104 on the opposite surfaces.

[0040] Embodiment 2

[0041] Different from the first embodiment, in this embodiment, the outer keel 1 is provided with hollow circles 104 on both the opposite and adjacent surfaces. Specifically, in this embodiment, the outer keel 1 is provided with four hollow circles 104 (refer to Figure 5 ) or three-sided hollow circle 104 (refer to Figure 6 ), the hollow circles 104 on the same surface are all of the same size and corresponding position as the hollow circles 102 on the opposite surface, and the projection of the center (center of the circle) of any hollow circle 104 on the adjacent surface falls on the center line of the length direction of the positive arch support 102 or the inverted arch support 103, so that the anti-torsion strength of the outer keel 1 can be increased, thereby further preventing the outer keel 1 from twisting and deforming. It should be noted that the length direction of the positive arch support 102 or the inverted arch support 103 can be understood as the short side direction of the surface where the positive arch support 102 or the inverted arch support 103 is located.

[0042] As a preferred embodiment of the above, in this embodiment, the minimum width of the positive arch support 102 and the inverted arch support 103 is smaller than the diameter of the hollow circle 104. Under the condition of ensuring sufficient load force, the size of the hollow circle 104 can be as large as possible, so that the more exposed wood (i.e., the inner keel 2), the more convenient it is to nail, and the weight of the outer keel 1 can be reduced. The size of the hollow circle 104 varies according to the size of the keel, that is, the larger the size of the (external) keel, the larger the size of the hollow circle 104, and vice versa, the smaller the size of the (external) keel, the smaller the size of the hollow circle 104. It should be noted that the minimum width of the positive arch support 102 and the inverted arch support 103 can be understood as the shortest distance between adjacent hollow circles 104 on the same surface. In addition, the width direction of the positive arch support 102 or the inverted arch support 103 can be understood as the long side direction of the surface where the positive arch support 102 or the inverted arch support 103 is located.

[0043] Reference Figure 3 As shown, the distance between the two ends of the outer keel 1 and the hollow circle 104 adjacent to the end of the outer keel 1 is not less than 20 mm. For example, an area of ​​30 mm, 40 mm or 50 mm is reserved on two, three or four sides of the hollow circle outer keel 1 without setting the hollow circle 104, so as to increase the load force and anti-fall ability of the two ends of the outer keel 1.

[0044] In order to prevent the pipe opening of the outer keel 1 from being deformed, the steel-wood composite keel further includes a plug cover 3. The length of the inner keel 2 is slightly smaller than that of the outer keel 1, and the plug cover 3 is inserted at both ends of the outer keel 1. Such a plug cover 3 is also called an inner plug-in plug cover 3, which is used to support the pipe opening of the outer keel 1. The plug cover 3 is detachably connected to the outer keel 1 through a connector (such as a screw, etc.), so that it can be easily disassembled.

[0045] Reference Figure 3 As shown, the plug cover 3 is concave, that is, it looks like a square or rectangular barrel, and the open end of the plug cover 3 faces the inner keel 2. The plug cover 3 is used to prevent the inner keel 2 from sliding out of the outer keel 1. The outer wall of the plug cover 3 is in contact with the inner wall of the outer keel 1, which is used to provide support for the pipe mouth of the outer keel 1. At the same time, the open end of the plug cover 3 is in contact with the end of the inner keel 2. At this time, the cross-section of the plug cover 3 is the same as the cross-section of the inner keel 2, or the two ends of the inner keel 2 have protrusions, which are used to be inserted into the groove (cavity) of the plug cover 3, so that the wood (i.e., the inner keel 2) is stronger.

[0046] As a preferred embodiment of the above, in this embodiment, the corners of the plug cover 3 match the inner R angle of the outer keel 1. Preferably, the corners of the plug cover 3 are rounded to prevent the outer keel 1 from being scratched when the plug cover 3 is installed. An observation hole 302 is provided on the plug cover 3 to check whether the wood square in the outer keel 1 (i.e., the inner keel 2) meets the length requirement to ensure that the quality of the steel-wood composite keel meets the standard.

[0047] In order to improve the aesthetics of the steel-wood composite keel, the plug cover 3 is arranged flush with the pipe opening of the outer keel 1. At this time, the sum of the lengths of the inner keel 2 and a pair of plug covers 3 is equal to the length of the outer keel 1.

[0048] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A steel-wood composite keel, comprising: An outer keel and an inner keel inserted into the outer keel, wherein the outer keel is a square tube or a rectangular tube, and is characterized in that at least two surfaces of the outer keel are provided with a plurality of pairs of arch supports along the length direction; Two adjacent arch supports located on the same plane are spaced apart by a positive arch support or an inverted arch support, and the positive arch support and the inverted arch support are butted together to form an integrated structure so that each pair of arch supports are butted together to form a hollow circle.

2. The steel-wood composite keel according to claim 1, characterized in that: The outer keel is provided with two hollow circles, and the hollow circles on the same surface are consistent in size and corresponding in position to the hollow circles on the opposite surface.

3. The steel-wood composite keel according to claim 1, characterized in that: The outer keel is provided with four or three hollow circles, and the hollow circles on the same surface are consistent in size and position with the hollow circles on the opposite surface; The projection of the center of any hollow circle on the adjacent surface falls on the center line of the regular arch support or the inverted arch support in the length direction.

4. The steel-wood composite keel according to claim 1, characterized in that: The minimum widths of the positive arch support and the inverted arch support are both smaller than the diameter of the hollow circle.

5. The steel-wood composite keel according to claim 1, characterized in that: The distances between the two ends of the outer keel and the hollow circle adjacent to the end of the outer keel are not less than 20 mm.

6. The steel-wood composite keel according to claim 1, characterized in that: The inner keel is made of wood, the outer side wall of the inner keel is tightly fitted with the inner side wall of the outer keel, and the length of the inner keel is smaller than the length of the outer keel.

7. The steel-wood composite keel according to claim 1, characterized in that: The steel-wood composite keel also includes: a plug cover; The plugging cover is inserted at both ends of the outer keel, and the plugging cover is detachably connected to the outer keel through a connecting piece.

8. The steel-wood composite keel according to claim 7, characterized in that: The plug cover is concave, the opening end of the plug cover faces the inner keel, the size of the plug cover matches the size of the outer keel, and the opening end of the plug cover abuts against the end of the inner keel; or Both ends of the inner keel have protrusions for being inserted into the grooves of the plug cover.

9. The steel-wood composite keel according to claim 7, characterized in that: The corners of the plug cover match the inner R corners of the outer keel; The plug cover is provided with an observation hole.

10. The steel-wood composite keel according to claim 7, characterized in that: The plug cover is arranged flush with the outer keel pipe opening.

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