Prestressed cement column for building agricultural shed frame

Abstract

A prestressed concrete column for building an agricultural shed frame relates to the field of agricultural shed frames, comprises a column body with a trapezoidal cross section, and at least two prestressed steel strands are arranged in the column body along the length direction of the column body, and is characterized in that the upper end of the column body is fixedly connected with a protective baffle made of plastic, and a connecting bolt column is arranged in the center of the protective baffle; the lower end of the connecting bolt column extends downwards into the stand column body and is fixedly connected with the stand column body, and the upper end of the connecting bolt column extends upwards and protrudes out of the protective blocking piece by at least 2 cm. The traction rope (steel wire rope) or the connecting rod is connected with the upper end of the stand column body through the connecting bolt column, the connecting operation is simple, and the building efficiency is high; the protective blocking piece made of plastic materials plays a role in blocking and protecting the upper face and the edge of the stand column body, the protective blocking piece is not prone to being damaged when scraped by plastic cloth, a protective net and other covering objects, and the service life of the stand column is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of agricultural sheds, in particular to a prestressed cement column for building agricultural sheds. Background Art

[0002] Prestressed cement columns have been widely used in agricultural shed construction in recent years due to their advantages such as high tensile strength, high stability and long service life. Agricultural sheds such as thermal insulation greenhouse frames and orchard protection sheds built with prestressed cement columns have the advantages of high stability, strong wind resistance and long service life. The applicant applied for a number of patents for the production of prestressed cement columns and prestressed cement columns from 2017 to 2018. During the process of building a scaffolding, after the lower end of the prestressed cement column is buried underground and fixed, it is necessary to connect a pulling rope (wire rope) or a connecting rod to the upper end of the prestressed cement column. The upper end of the existing prestressed cement column is a flat surface, and it is necessary to add a connecting ring thereon to connect the pulling rope or the connecting rod, which is troublesome, time-consuming and labor-intensive to operate; after long-term use, the connecting ring is easy to loosen, affecting the overall stability of the scaffolding; the outer surface of the upper end of the prestressed cement column is rough, and its edge is easy to bump and form a gap during transportation. After the scaffolding is built, when the upper end of the prestressed cement column scrapes against external coverings such as plastic sheets and protective nets, the plastic sheets, protective nets and other external coverings are easily damaged, shortening their service life. Summary of the invention

[0003] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and to provide a prestressed cement column for building an agricultural shed which is easy to connect with a pulling rope or a connecting rod, is simple and convenient to operate, has high overall stability of the shed, and is not likely to affect the service life of external coverings such as plastic sheets and protective nets.

[0004] The technical solution adopted by the utility model to solve the above-mentioned deficiencies of the prior art is:

[0005] A prestressed cement column for building an agricultural shed, comprising a column body with a trapezoidal cross-section, wherein at least two prestressed steel strands are arranged inside the column body along its length direction, and wherein the upper end of the column body is fixedly connected to a protective baffle made of plastic material, a connecting bolt is arranged in the center of the protective baffle, the lower end of the connecting bolt extends downward into the column body and is fixedly connected thereto, and the upper end of the connecting bolt extends upward and protrudes from the protective baffle by at least 2 cm.

[0006] Preferably, the lower end of the connecting bolt extends downward into the column body and is fixedly connected thereto by 5-10 cm, and the upper end of the connecting bolt extends upward and protrudes 5-10 cm from the protective baffle, thereby achieving good fixing effect and convenient connection and installation.

[0007] As a further improvement, the protective baffle is in the shape of a trapezoidal sheet with the same cross section as the column body, and at least two prestressed steel strand insertion grooves are provided on the protective baffle. In the process of preparing the prestressed cement column, the protective baffle is directly placed in the processing mold groove as a baffle of the processing mold, and the prestressed steel strand is located in the corresponding prestressed steel strand insertion groove. The cement mortar (concrete) used to produce the prestressed cement column is directly poured into the processing mold on one side of the protective baffle, and the lower end of the connecting bolt is located in the cement mortar (concrete) and directly solidified into one body. One side of the protective baffle is also fixed by the solidified cement. There is no need to install the protective baffle and the connecting bolt on the upper end of the solidified column body, which saves time and effort and is highly efficient.

[0008] The open end of the prestressed steel strand placement groove is located on the upper bottom edge of the protective baffle, and the prestressed steel strand placement groove extends from the upper bottom edge to the lower bottom edge. In the process of preparing the prestressed cement column, the upper bottom edge of the protective baffle is facing downward, the open end of the steel strand placement groove is opposite to the steel strand, and the protective baffle is inserted and installed in the processing mold groove of the prestressed cement column from top to bottom.

[0009] The open end of the prestressed steel strand insertion groove is located on the (two) waist edges of the protective baffle, the number of the prestressed steel strand insertion groove is an even number, the number of the prestressed steel strand insertion grooves on the two waist edges of the protective baffle is the same and is relatively arranged; the prestressed steel strand insertion groove is parallel to the upper bottom edge and the lower bottom edge of the protective baffle.

[0010] Further improvement, the protective baffle is provided with a stabilizing baffle around the lower side of the protective baffle, and the stabilizing baffle is arranged in a ring shape around the lower side of the protective baffle except for the prestressed steel strand insertion groove. The stabilizing baffle and the protective baffle form a protective baffle cap in the shape of a bottle cap as a whole, and the protective baffle cap is buckled on the upper end of the column body, with strong bonding force and more stable structure, and the connecting bolt column can withstand greater external force without being easily loosened.

[0011] As a further improvement, a stabilizing boss is provided on the lower side of the protective baffle, which is embedded in the upper end surface of the column body, thereby increasing the impact resistance of the protective baffle, and the contact area between the protective baffle and the column body is large, and the connection is more firm.

[0012] When the prestressed cement column of the utility model is used to build a scaffold, one end (upper end) of the prestressed cement column with the protective baffle is facing upwards, and the other end (lower end) is buried in the soil for fixation, and the pulling rope (wire rope) or the connecting rod is connected to the upper end of the column body through the connecting bolt, so the connection operation is simple and the construction efficiency is high; the protective baffle made of plastic material has a shielding and protective effect on the upper side and edge of the column body, and the protective baffle is not easily damaged when external coverings such as plastic cloth and protective nets are scratched, thereby extending its service life; the connecting bolt is fixedly connected to the protective baffle, which increases the performance of the connecting bolt to withstand external forces and improves its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present utility model;

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle protective baffle;

[0015] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the middle protective baffle.

[0016] Figure 4 It is another structural schematic diagram of the present utility model;

[0017] Figure 5 yes Figure 4 A schematic diagram of the structure of the middle protective baffle;

[0018] Figure 6 yes Figure 4 Schematic diagram of the three-dimensional structure of the middle protective baffle. DETAILED DESCRIPTION

[0019] Example 1

[0020] like Figure 1 The prestressed cement column for building agricultural scaffolding shown in the figure includes a column body 3 with a trapezoidal cross-section. Four prestressed steel strands are arranged inside the column body 3 along its length. The above structure is the same as the prior art. The characteristics of the utility model are: a protective baffle 2 made of plastic material is fixedly connected to the upper end of the column body 3. The upper side surface of the protective baffle 2 is smoothly connected to the surrounding side surfaces via an arc surface. A connecting bolt 1 is provided in the center of the protective baffle 2. The connecting bolt 1 is fixedly connected to the protective baffle 2. The connecting bolt 1 and the protective baffle can be fixedly connected via threads, fixedly connected via nuts, or the protective baffle is directly injection molded on the connecting bolt 1. Figure 2 , Figure 3 It can be seen that the protective baffle 2 is a trapezoidal sheet with the same cross-section (shape and size) as the column body. The upper bottom side 6 of the protective baffle 2 is provided with two prestressed steel strand insertion grooves 4 extending from the upper bottom side 6 to the lower bottom side 5. The prestressed steel strand is located in the prestressed steel strand insertion groove 4. The shorter bottom side of the trapezoidal protective baffle is the upper bottom side, and the longer bottom side of the trapezoid is the lower bottom side. The lower end of the connecting bolt column 1 extends downward from the lower side of the protective baffle 2 into the column body 3 by 10 cm and is fixedly connected thereto. The upper end of the connecting bolt column 1 extends upward from the upper side of the protective baffle 2, protruding from the protective baffle by 10 cm, and is used to connect the pulling rope (wire rope) or the connecting rod.

[0021] The column body 3 in the utility model is solidified and bonded to the protective baffle with the connecting bolt column. Specifically, in the process of preparing the prestressed cement column, the protective baffle is used as a baffle plate of the processing mold and is directly placed in the processing mold groove. The prestressed steel strand is located in the corresponding prestressed steel strand insertion groove. The cement mortar (concrete) used to produce the prestressed cement column is directly poured in the processing mold on one side of the protective baffle. The lower end of the connecting bolt column is located in the cement mortar (concrete) and is directly solidified into one. One side of the protective baffle is also fixed by the solidified cement. There is no need to install the protective baffle and the connecting bolt column on the upper end of the solidified column body, which saves time and effort and has high efficiency.

[0022] Example 2

[0023] like Figure 4 The prestressed cement column for building agricultural scaffolding shown in the figure includes a column body 3 with a trapezoidal cross section. Six prestressed steel strands 8 are arranged inside the column body 3 along its length. The above structure is the same as the prior art. A protective baffle 2 made of plastic is fixedly connected to the upper end of the column body 3. The upper side of the protective baffle 2 is smoothly connected to the surrounding side surfaces via an arc surface. A connecting bolt 1 is arranged in the center of the protective baffle 2. The connecting bolt 1 is fixedly connected to the protective baffle 2. In this embodiment, the protective baffle 2 is directly injection molded in the middle of the connecting bolt 1. Figure 5 , Figure 6 It can be seen that the protective baffle 2 is a trapezoidal sheet with the same cross-section (shape and size) as the column body 3. Six prestressed steel strand insertion grooves 4 are provided on the two waist sides of the protective baffle 2, and three prestressed steel strand insertion grooves 4 are provided on each waist side of the protective baffle. The prestressed steel strand insertion grooves 4 on the two waist sides of the protective baffle are opposite to each other; the six prestressed steel strand insertion grooves 4 are parallel to the upper bottom side 5 and the lower bottom side 6 of the protective baffle; the prestressed steel strand 8 is located in the prestressed steel strand insertion grooves 4; the protective baffle of this structure can play a role in positioning the prestressed steel strand 8 in its radial direction during the preparation of prestressed cement columns to prevent the prestressed steel strand from bending when it is too long. The lower end of the connecting bolt column 1 extends downward from the lower side of the protective baffle into the column body by 8 cm and is fixedly connected to it. The upper end of the connecting bolt column extends upward from the upper side of the protective baffle 2 and protrudes 8 cm from the protective baffle. From Figure 6 It can be seen that the protective baffle 2 is provided with a stabilizing baffle 9 around the lower side, and the stabilizing baffle 9 is arranged in a ring shape around the lower side of the protective baffle except for the prestressed steel strand insertion groove, that is, the ring-shaped stabilizing baffle is provided with a steel strand insertion groove at a position opposite to the prestressed steel strand insertion groove 4. The stabilizing baffle 9 and the protective baffle 2 form a protective baffle cap in the shape of a bottle cap as a whole, and the protective baffle cap is buckled at the upper end of the column body 3, which increases the base area, has a strong bonding force, and a more stable structure, and the connecting bolt can withstand greater external force without being easily loosened.

[0024] Further improvement of Example 1 and Example 2, the lower side of the protective baffle 2 is provided with a stabilizing boss 7. Figure 3 , Figure 6 It can be seen that the stabilizing boss 7 is arranged at the center of the lower side of the protective baffle 2, and the connecting bolt 1 passes through the middle of the stabilizing boss 7. The stabilizing boss is a plastic boss made integrally with the protective baffle 2. The stabilizing boss 7 is embedded in the upper end surface of the column body, which improves the impact resistance of the protective baffle, and the contact area between the protective baffle and the column body is large, the connection is more firm, and the overall stability of the scaffold is high.

Claims

1. A prestressed cement column for building an agricultural shed, comprising a column body with a trapezoidal cross section, wherein at least two prestressed steel strands are arranged in the column body along its length direction, characterized in that: A protective baffle made of plastic is fixedly connected to the upper end of the column body, and a connecting bolt is provided in the center of the protective baffle. The lower end of the connecting bolt extends downward into the column body and is fixedly connected to it, and the upper end of the connecting bolt extends upward and protrudes from the protective baffle by at least 2 cm.

2. The prestressed cement column for building an agricultural scaffold according to claim 1, characterized in that: The lower end of the connecting bolt column extends downward into the column body and is fixedly connected thereto by a length of 5-10 cm, and the upper end of the connecting bolt column extends upward and protrudes from the protective baffle by 5-10 cm.

3. The prestressed cement column for building an agricultural scaffold according to claim 1 or 2, characterized in that: The protective baffle is in the shape of a trapezoidal sheet with the same cross section as the column body, and is provided with at least two prestressed steel strand insertion grooves.

4. The prestressed cement column for building an agricultural scaffold according to claim 3, characterized in that: The open end of the prestressed steel strand insertion groove is located on the upper bottom edge of the protective baffle, and the prestressed steel strand insertion groove extends from the upper bottom edge to the lower bottom edge.

5. The prestressed cement column for building an agricultural scaffold according to claim 3, characterized in that: The open end of the prestressed steel strand insertion groove is located on the waist edge of the protective baffle, the number of the prestressed steel strand insertion groove is an even number, the number of the prestressed steel strand insertion grooves on the two waist edges of the protective baffle is the same and is relatively arranged; the prestressed steel strand insertion groove is parallel to the upper bottom edge and the lower bottom edge of the protective baffle.

6. The prestressed cement column for building an agricultural scaffold according to claim 5, characterized in that: The lower side of the protective baffle is surrounded by a stabilizing baffle. The stabilizing baffle is arranged in a ring shape around the lower side of the protective baffle except for the position where the prestressed steel strand is placed in the groove.

7. The prestressed cement column for building an agricultural scaffold according to claim 6, characterized in that: A stabilizing boss is provided on the lower side of the protective baffle.

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