Large diameter steel casing installation device and construction method

Abstract

The present invention relates to a large-diameter steel casing installation device and construction method, which belongs to the field of building construction technology and is used to solve the problem of positioning deviation when the steel casing is installed in a core tube wall with large thickness, strange shape and extremely high installation accuracy requirements. The device includes a positioning cross ruler, a steel bracket and a corbel connector, the positioning cross ruler matches the cross section of the steel casing pipe mouth; the steel bracket includes a support leg and a steel plate platform, the steel plate platform is fixed to the top of the support leg; the corbel connector is welded to the steel casing, and the steel casing is fixedly connected to the steel plate platform through the corbel connector. The steel casing is fixed to the manufactured steel bracket and installed as a whole in the concrete core tube wall. The construction method firstly hoists the steel casing to the steel plate platform of the steel bracket through a gantry, and uses a positioning cross ruler to position the steel casing, and welds the corbel connector to the steel casing, and installs the steel sleeve to the predetermined position of the corresponding core tube wall.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a large-diameter steel casing installation device and a construction method. Background Art

[0002] In the nuclear facility structure, the diameter of the embedded casing on the core tube wall is relatively large, and a certain degree of inclination needs to be set between the steel casing and the wall to meet the functional needs of the nuclear facility. Therefore, the positioning accuracy of the embedded steel casing on the core tube wall is required to be relatively high. In reality, the core tube wall is often of strange shapes and thick, and the diameter of the steel casing is also large, so positioning is difficult; at the same time, when the positioning meets the requirements for concrete pouring construction, the concrete vibration during the construction process and the large flexibility of the steel bars cause the steel casing to shift. When the equipment is installed in the later stage, the positioning deviation of the steel casing will often affect the use of the equipment function.

[0003] Therefore, the traditional steel casing burial method can no longer meet the requirements of nuclear facility function use, and a new steel casing installation method must be selected to ensure the installation accuracy requirements of nuclear facility steel casing. Therefore, a large-diameter steel casing installation device is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a large-diameter steel casing installation device and construction method, which are used to solve the problem of positioning deviation when the steel casing is installed in a core tube wall with large thickness, strange shape and extremely high installation accuracy requirements.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A positioning cross ruler, the positioning cross ruler matches the cross section of the steel casing pipe mouth;

[0007] A steel bracket, the steel bracket comprising legs and a steel plate platform, the steel plate platform being fixed to the top of the legs;

[0008] A corbel connector is welded to the steel casing, and the steel casing is fixedly connected to the steel plate platform via the corbel connector.

[0009] Compared with the prior art, the beneficial technical effects of the present invention are:

[0010] (1) The large-diameter steel casing installation device of the present invention includes a positioning cross ruler, a steel bracket and a corbel connector. The positioning cross ruler matches the cross section of the steel casing pipe mouth; the steel bracket includes a support leg and a steel plate platform, and the steel plate platform is fixed to the top of the support leg; the corbel connector is welded to the steel casing, and the steel casing is fixedly connected to the steel plate platform through the corbel connector. The steel casing is fixed to the manufactured steel bracket and installed as a whole in the concrete core tube wall, which is used to solve the problem of positioning deviation when the steel casing is installed in a core tube wall with large thickness, strange shape and extremely high installation accuracy requirements. This method can effectively avoid the positioning error caused by the installation of large-diameter steel casing on the core tube wall with large thickness and strange shape, reduce the disturbance caused by concrete construction, and meet the requirements of nuclear facilities for the installation accuracy of steel casing.

[0011] (2) The construction method of the large-diameter steel casing installation device of the present invention is to firstly hoist the steel casing onto the steel plate platform of the steel bracket through the gantry, and use the positioning cross ruler to position the steel casing, and weld the bracket connector to the steel casing, and then install the steel casing to the predetermined position of the corresponding core tube wall. The construction method is easy to operate, economical, and has good promotion value.

[0012] Furthermore, it also includes gantries, wherein there are two gantries, and the two gantries are symmetrically welded to the steel plate.

[0013] Furthermore, the gantry is equipped with a hand winch.

[0014] Furthermore, the steel bracket is made of channel steel.

[0015] Furthermore, the positioning cross has a diameter of 50 mm and is provided with a tip portion of 5 mm in length.

[0016] The present invention also provides a construction method for a large-diameter steel casing installation device, the construction method comprising the following steps:

[0017] Step S1, making a pair of gantries on a flat ground, and configuring two hand chain hoists;

[0018] Step S2, making a positioning cross ruler at the pipe mouth of the steel casing to locate the relative position of the steel casing;

[0019] Step S3, welding a steel plate platform on the top of the steel support to position, support and fix the steel casing;

[0020] Step S4, locating the center point, elevation and center line of the steel plate platform, and projecting them onto the steel casing using a computer, and making a corbel connector according to the distance between the steel plate platform and the steel casing;

[0021] Step S5, lifting the steel casing by the gantry made in step S1, positioning the steel casing by using the positioning cross ruler made in step S2, determining the position of the steel plate platform positioning point in step S4 on the steel casing, and installing the corbel connector on the steel casing;

[0022] Step S6: According to the positioning of the steel support steel plate platform corresponding to the steel casing corbel connector, the steel casing is welded to the steel support through the corbel connector, and installed to the predetermined position of the corresponding core tube wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the gantry of the large-diameter steel casing installation device of the present invention;

[0024] Figure 2 It is a schematic diagram of the connection between the gantry and the steel casing of the large-diameter steel casing installation device of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection between the positioning cross of the large-diameter steel casing installation device of the present invention and the steel casing;

[0026] Figure 4 It is a structural schematic diagram of a steel support in a large-diameter steel casing installation device of the present invention;

[0027] Figure 5 It is a front view of the connection between the steel support and the steel casing in the large-diameter steel casing installation device of the present invention;

[0028] Figure 6 It is a side view of the connection between the steel support and the steel casing in the large-diameter steel casing installation device of the present invention.

[0029] In the figure:

[0030] 1- steel casing; 2- gantry; 3- positioning cross ruler; 4- steel bracket, 41- leg, 42- steel plate platform; 5- corbel connector. DETAILED DESCRIPTION

[0031] The large diameter steel casing installation device and construction method proposed in the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the accompanying drawings, but this cannot be a limitation of the technical solution of the present invention.

[0032] Combine the following Figures 1 to 6 The large diameter steel casing installation device and construction method of the present invention are described in detail.

[0033] Embodiment 1

[0034] like Figures 1 to 6 As shown, the large diameter steel casing installation device of the present invention comprises a positioning cross ruler 3, a steel bracket 4 and a corbel connector 5, wherein the positioning cross ruler 3 matches the cross section of the pipe mouth of the steel casing 1; the steel bracket 4 comprises a leg 41 and a steel plate platform 42, wherein the steel plate platform 42 is fixed to the top of the leg 41; the corbel connector 5 is welded to the steel casing 1, and the steel casing 1 is fixedly connected to the steel plate platform 42 through the corbel connector 5. By fixing the steel casing 1 on the manufactured steel bracket 4 and installing it as a whole in the concrete core tube wall, the problem of positioning deviation when the steel casing is installed in the core tube wall with large thickness, strange shape and extremely high installation accuracy requirements is solved. The method can effectively avoid the positioning error caused by the installation of large diameter steel casing on the core tube wall with large thickness and strange shape, reduce the disturbance of concrete construction to it, and meet the requirements of nuclear facilities for the installation accuracy of steel casing.

[0035] In this embodiment, more preferably, it further includes a gantry 2, and there are two gantry frames 2, and the two gantry frames are symmetrically welded on the steel plate.

[0036] In this embodiment, more preferably, the gantry 2 is equipped with a hand winch.

[0037] In this embodiment, more preferably, the steel bracket 4 is made of channel steel.

[0038] Please continue to refer to Figures 1 to 6 The present invention also provides a construction method for a large-diameter steel casing installation device, the construction method comprising the following steps:

[0039] Step S1, make a pair of gantries 2 on a level site, and equip them with two hand hoists; prepare a 5m×5m level site on site, and make two 2m×2.5m gantries, and equip them with two 5t hand hoists; the site flatness and bearing capacity meet the requirements, and the bearing capacity and stability of the gantry 2 can meet the lifting requirements of the steel casing 1.

[0040] Step S2, making a positioning cross ruler at the pipe mouth of the steel casing 1 to locate the relative position of the steel casing 1; the diameter of the positioning cross ruler is 50 mm, and a tip portion with a length of 5 mm is provided.

[0041] Step S3, a steel plate platform 42 is welded on the top of the steel bracket 4 to position, support and fix the steel casing 1;

[0042] Step S4, locating the center point and elevation of the steel plate platform 42 and the center line of the steel casing 1, and projecting them onto the steel casing 1 using a computer, and making the corbel connector 5 according to the distance between the steel plate platform 42 and the steel casing 1;

[0043] Step S5, lifting the steel casing 1 by the gantry 2 manufactured in step S1, positioning the steel casing 1 by using the positioning cross ruler 3 manufactured in step S2, determining the position of the positioning point of the steel plate platform 42 in step S4 on the steel casing 1, and installing the corbel connector 5 on the steel casing 1;

[0044] Step S6, according to the positioning of the steel bracket steel plate platform 42 corresponding to the steel casing corbel connector 5, the steel casing 1 is welded to the steel bracket 4 through the corbel connector 5, and installed to the predetermined position of the corresponding core tube wall. The construction method for installing a large-diameter steel casing provided by the present invention effectively solves the problem of large positioning errors and large disturbances caused by concrete construction when the large-diameter steel casing is installed on a core tube wall with a large thickness and a strange shape.

[0045] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A construction method for a large diameter steel casing installation device, characterized in that: A large-diameter steel casing installation device is used, which includes a positioning cross ruler, a steel bracket and a corbel connector, wherein the positioning cross ruler matches the cross section of the steel casing pipe mouth; the steel bracket includes a leg and a steel plate platform, wherein the steel plate platform is fixed to the top of the leg; the corbel connector is welded to the steel casing, and the steel casing is fixedly connected to the steel plate platform through the corbel connector; the construction method includes the following steps: Step S1, making a pair of gantries on a flat ground, and configuring two hand chain hoists; Step S2, making a positioning cross ruler at the pipe mouth of the steel casing to locate the relative position of the steel casing; Step S3, welding a steel plate platform on the top of the steel support to position, support and fix the steel casing; Step S4, locating the center point, elevation and center line of the steel plate platform, and projecting the center point of the steel plate platform onto the steel casing using a computer, and making a corbel connector according to the distance between the steel plate platform and the steel casing; Step S5, lifting the steel casing by the gantry made in step S1, positioning the steel casing by using the positioning cross ruler made in step S2, determining the position of the steel plate platform positioning point in step S4 on the steel casing, and installing the corbel connector on the steel casing; Step S6: According to the positioning of the steel support steel plate platform corresponding to the steel casing corbel connector, the steel casing is welded to the steel support through the corbel connector, and installed to the predetermined position of the corresponding core tube wall.

2. The construction method according to claim 1, characterized in that: In step S4, a computer is used to project the center point of the steel plate platform onto the arc surface of the steel casing to accurately locate the arc surface position of the corbel connector.

3. The construction method according to claim 2, characterized in that: The vertical distance between the steel plate platform and the projection point of the arc surface of the steel casing is determined by computer to determine the manufacturing length of the corbel connector.

4. The construction method according to claim 1, characterized in that: It also includes two gantries, which are symmetrically welded to the steel plate.

5. The construction method according to claim 4, characterized in that: The gantry is equipped with a hand chain hoist.

6. The construction method according to claim 4, characterized in that: The steel bracket is made of channel steel.

7. The construction method according to claim 4, characterized in that: The positioning cross has a diameter of 50 mm and a tip portion with a length of 5 mm.

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