A method for destructive dismantling of horizontally placed scrap steel equipment

Abstract

This invention discloses a method for the destructive dismantling of horizontally placed scrap steel equipment. By strategically positioning longitudinal and transverse cutting lines, the outer wall of the equipment is divided into two main dismantling modules: an arc-shaped upper cover and an arc-shaped lower cover. Additionally, there are 2N+2 partial dismantling modules located in the middle, comprising N+1 front-middle sections and N+1 rear-middle sections. The method involves first cutting the longitudinal and transverse cutting lines, then severing the pre-cut sections, to destructively dismantle the middle section of the equipment into N+1 front-middle sections and N+1 rear-middle sections. The arc-shaped upper cover then falls onto the arc-shaped lower cover, allowing for dismantling of both sections using conventional ground-based methods. This method achieves the destructive dismantling of the horizontally placed scrap steel equipment. Therefore, this invention offers advantages such as low safety risk, fast construction speed, and low cost.

Description

Technical Field

[0001] This invention relates to the dismantling and construction of equipment such as towers, industrial furnaces, and vertical containers after they have been laid down, specifically a destructive dismantling method for horizontally laid scrap steel equipment. Background Technology

[0002] According to the "Action Plan for Strict Energy Efficiency Constraints and Promoting Energy Conservation and Carbon Reduction in Key Petrochemical Industries (2021-2025)" issued by the National Development and Reform Commission, inefficient production capacity in the petrochemical sector is being guided to exit in an orderly manner, and energy conservation and carbon reduction actions are being implemented. Relevant parties are gradually reviewing outdated facilities and explicitly requiring the "large-scale replacement of small-scale" policy to eliminate or shut down production facilities and facilities that have not obtained compliance permits for resumption of operation. It is estimated that more than 300 chemical industrial parks in China will be phased out and upgraded, creating a huge market for dismantling. Currently, dismantling solutions are gradually developing towards modular / equipment overall directional tilting technology. A large number of vertical equipment, after being directionally tilted, become horizontally placed steel scrap equipment. The decomposition speed will determine the safe and efficient implementation of subsequent module / equipment tilting. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for the destructive dismantling of horizontally placed scrap steel equipment.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A destructive dismantling method for horizontally placed scrap steel equipment is applicable to horizontally placed scrap steel equipment obtained by directional tilting and dismantling of vertical steel cylindrical equipment, such as towers, industrial furnaces, vertical containers, etc., which are tilted and placed on a horizontal working surface awaiting dismantling.

[0006] Before implementing this invention, it is necessary to check and confirm the stability of the horizontally placed scrap steel equipment, and to check that the ground around the horizontally placed scrap steel equipment meets the safety requirements of workers and construction machinery, so as to ensure the safety of the implementation of this invention.

[0007] Its features include:

[0008] Step S1: Mark the longitudinal cutting line, transverse cutting line, and pre-cutting section for the horizontally placed steel scrap equipment to ensure accurate cutting.

[0009] Step S2: According to the layout and marking, cut N pairs of longitudinal cutting lines, where N≥2. Each pair of longitudinal cutting lines includes a front longitudinal cutting line and a rear longitudinal cutting line arranged symmetrically. Each set of longitudinal cutting lines is evenly spaced along the left and right directions.

[0010] The number of longitudinal cutting lines and the distance between them are determined comprehensively based on the specifications of the horizontally placed scrap steel equipment and the capabilities of the machinery.

[0011] Step S3: According to the layout marking, cut two sets of horizontal cutting lines arranged symmetrically up and down. The first set of horizontal cutting lines includes N+2 pairs of upper horizontal cutting lines evenly spaced along the left and right direction. Each pair of upper horizontal cutting lines includes a front upper horizontal cutting line and a rear upper horizontal cutting line arranged symmetrically from front to back. The second set of horizontal cutting lines includes N+2 pairs of lower horizontal cutting lines evenly spaced along the left and right direction. Each pair of lower horizontal cutting lines includes a front lower horizontal cutting line and a rear lower horizontal cutting line arranged symmetrically from front to back.

[0012] Furthermore, the positions of the transverse cutting lines satisfy the following conditions: the first pair of upper and lower transverse cutting lines connect to the left edge of the horizontally placed steel scrap equipment; the last pair of upper and lower transverse cutting lines connect to the right edge of the horizontally placed steel scrap equipment; and the intermediate N pairs of upper and lower transverse cutting lines connect to the N pairs of longitudinal cutting lines respectively. If one end of the horizontally placed steel scrap equipment is a closed end, then a pair of upper transverse cutting lines connected to that end are connected to it, and a pair of lower transverse cutting lines are connected to it, for example... Figure 1 The rightmost pair of upper and lower horizontal cutting lines.

[0013] Therefore, the interval between two adjacent transverse cutting lines is recorded as the cutting reserved section. Each quadrilateral area enclosed by the left edge, right edge, front longitudinal cutting line, front upper transverse cutting line, and front lower transverse cutting line of the horizontally placed steel scrap equipment is recorded as the front middle block. Each quadrilateral area enclosed by the left edge, right edge, rear longitudinal cutting line, rear upper transverse cutting line, and rear lower transverse cutting line of the horizontally placed steel scrap equipment is recorded as the rear middle block. That is, each front middle block and each rear middle block are connected to the arc-shaped upper and lower covers of the horizontally placed steel scrap equipment through two symmetrical cutting reserved sections.

[0014] In steps S2 and S3, each longitudinal cutting line and each transverse cutting line can be cut at multiple points, or they can be cut sequentially in left-right order, but cutting the reserved section is strictly prohibited.

[0015] The positioning of the horizontal cutting line is determined comprehensively based on the specifications of the horizontally placed steel scrap equipment, the cutting equipment, and the mechanical capabilities.

[0016] The length of the pre-cut section is determined comprehensively based on the specifications, wall thickness, mechanical equipment capacity, load-bearing capacity of the pre-cut section, and internal support of the horizontally placed steel scrap equipment.

[0017] The longitudinal and transverse cutting lines can be cut using automated equipment or manually, depending on the condition of the outer wall of the horizontally placed scrap steel equipment. When cutting manually, an extended rod cutting gun should be used for cutting lines at higher locations.

[0018] Step S4: By cutting off the pre-cut section, remove the front middle section and the rear middle section of each piece so that the arc-shaped upper cover falls onto the arc-shaped lower cover, thereby achieving the destructive dismantling of the horizontally placed steel scrap equipment. After confirming that the fallen arc-shaped upper cover is stable, the dismantling operation of the arc-shaped upper cover and the arc-shaped lower cover can be achieved through conventional ground operations.

[0019] Therefore, this invention divides the outer wall of a horizontally placed scrap steel equipment into two major decomposition modules—an arc-shaped upper cover and an arc-shaped lower cover—by the positional distribution of longitudinal and transverse cutting lines, as well as 2N+2 partial decomposition modules located in the middle, including N+1 front-middle blocks and N+1 rear-middle blocks. Furthermore, by first cutting the longitudinal and transverse cutting lines and then cutting off the pre-reserved sections, the middle part of the horizontally placed scrap steel equipment is destructively decomposed into N+1 front-middle blocks and N+1 rear-middle blocks, allowing the arc-shaped upper cover to fall onto the arc-shaped lower cover. This enables the decomposition of the arc-shaped upper and lower covers to be achieved through conventional ground operations, thus realizing the destructive decomposition of the horizontally placed scrap steel equipment. Therefore, this invention has the advantages of low safety risk, fast construction speed, and low cost.

[0020] Furthermore, this invention can be implemented using conventional equipment on the construction site by laying down the scrap steel equipment, without the need for separate machinery for the dismantling operation.

[0021] Moreover, the construction operation of this invention does not require the erection of scaffolding or working platforms, and there is no work at height, resulting in low safety risks, high decomposition efficiency, and low construction costs.

[0022] Preferably, in steps S2 and S3, the longitudinal cutting line extends in the vertical direction, and the transverse cutting line extends in the horizontal direction; both the front middle block and the rear middle block are rectangular blocks.

[0023] Preferably, in step S4, hydraulic shears are used to tear or cut the pre-cut segment.

[0024] Preferably, in step S4, the front middle section and the rear middle section, which are symmetrically arranged, are removed in pairs in order from left to right or from right to left, so that the arc-shaped upper cover gradually falls onto the arc-shaped lower cover from left to right or from right to left during the removal process, thereby improving the safety of the present invention.

[0025] Preferably, in the case where the interior of the horizontally placed steel scrap equipment contains internal support components, in step S4, as the front middle block and the rear middle block, which are arranged symmetrically in pairs, are removed in sequence, the internal support components at the locations of the front middle block and the rear middle block are simultaneously removed to release the constraint of the internal support components on the arc-shaped top cover.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention divides the outer wall of a horizontally placed scrap steel equipment 1 into two main decomposition modules—an arc-shaped upper cover 1-1 and an arc-shaped lower cover 1-2—by the distribution of longitudinal and transverse cutting lines, as well as 2N+2 partial decomposition modules located in the middle, including N+1 front-side middle blocks Sq and N+1 rear-side middle blocks Sh. Furthermore, by first cutting the longitudinal and transverse cutting lines and then cutting off the reserved cutting section L, the middle part of the horizontally placed scrap steel equipment 1 is destructively decomposed into N+1 front-side middle blocks Sq and N+1 rear-side middle blocks Sh, causing the arc-shaped upper cover 1-1 to fall onto the arc-shaped lower cover 1-2. This allows for the decomposition of the arc-shaped upper cover 1-1 and arc-shaped lower cover 1-2 through conventional ground operations, thus achieving the destructive decomposition of the horizontally placed scrap steel equipment 1. Therefore, this invention has the advantages of low safety risk, fast construction speed, and low cost.

[0028] Furthermore, the present invention can be implemented using conventional equipment at the construction site by laying the steel scrap equipment 1 horizontally, without the need to configure separate machinery for the dismantling operation.

[0029] Moreover, the construction operation of this invention does not require the erection of scaffolding or working platforms, and there is no work at height, resulting in low safety risks, high decomposition efficiency, and low construction costs. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0031] Figure 1 This is a diagram showing the cutting line arrangement during the destructive dismantling of horizontally placed scrap steel equipment according to the present invention. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the embodiments and accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative effort without departing from the inventive concept of the present invention are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be clearly stated that the directional terms "front," "back," "left," and "right" are only relative concepts in terms of location. They are used to facilitate the description of this invention or to simplify the description, and are not intended to indicate or imply a specific location that this invention must have. Therefore, they should not be construed as limiting this invention.

[0034] like Figure 1 As shown, the present invention discloses a destructive dismantling method for horizontally placed scrap steel equipment, applicable to horizontally placed scrap steel equipment 1 obtained by directional tilting and dismantling of vertical steel cylindrical equipment, such as towers, industrial furnaces, vertical containers, etc., tilted and placed on a horizontal working surface awaiting dismantling construction;

[0035] Before implementing this invention, it is necessary to check and confirm the stability of the horizontally placed steel scrap equipment 1, and to check that the ground around the horizontally placed steel scrap equipment 1 meets the safety requirements of workers and construction machinery, so as to ensure the safety of the implementation of this invention.

[0036] include:

[0037] Step S1: Mark the longitudinal cutting line, transverse cutting line and the reserved cutting section for the horizontally placed steel scrap equipment 1 to ensure accurate cutting.

[0038] Step S2: According to the layout and marking, cut N pairs of longitudinal cutting lines, where N≥2. Each pair of longitudinal cutting lines includes a front longitudinal cutting line Zq and a rear longitudinal cutting line Zh arranged symmetrically. Each set of longitudinal cutting lines is evenly spaced along the left and right directions.

[0039] The number of longitudinal cutting lines and the distance between them are determined comprehensively based on the specifications of the horizontally placed steel scrap equipment 1 and the capabilities of the machinery.

[0040] Step S3: According to the layout marking, cut two sets of horizontal cutting lines arranged symmetrically up and down. The first set of horizontal cutting lines includes N+2 pairs of upper horizontal cutting lines evenly spaced along the left and right direction. Each pair of upper horizontal cutting lines includes a front upper horizontal cutting line Hqs and a rear upper horizontal cutting line Hhs arranged symmetrically from front to back. The second set of horizontal cutting lines includes N+2 pairs of lower horizontal cutting lines evenly spaced along the left and right direction. Each pair of lower horizontal cutting lines includes a front lower horizontal cutting line Hqx and a rear lower horizontal cutting line Hhx arranged symmetrically from front to back.

[0041] Furthermore, the positions of the transverse cutting lines satisfy the following conditions: the first pair of upper and lower transverse cutting lines are connected to the left edge 1z of the horizontally placed steel scrap equipment 1; the last pair of upper and lower transverse cutting lines are connected to the right edge 1y of the horizontally placed steel scrap equipment 1; and the intermediate N pairs of upper and lower transverse cutting lines are respectively connected to the N pairs of longitudinal cutting lines. Wherein, if a certain end of the horizontally placed steel scrap equipment 1 is a closed end, then a pair of upper transverse cutting lines connected to that end are connected, and a pair of lower transverse cutting lines are connected, for example... Figure 1 The rightmost pair of upper and lower horizontal cutting lines.

[0042] Therefore, the interval between two adjacent transverse cutting lines is denoted as the cutting reserved segment L. Each quadrilateral area enclosed by the left edge 1z, right edge 1y, front longitudinal cutting line Zq, front upper transverse cutting line Hqs, and front lower transverse cutting line Hqx of the horizontally placed steel scrap equipment 1 is denoted as the front middle block Sq. Each quadrilateral area enclosed by the left edge 1z, right edge 1y, rear longitudinal cutting line Zh, rear upper transverse cutting line Hhs, and rear lower transverse cutting line Hhx of the horizontally placed steel scrap equipment 1 is denoted as the rear middle block Sh. That is, each front middle block Sq and each rear middle block Sh are connected to the arc-shaped upper cover 1-1 and arc-shaped lower cover 1-2 of the horizontally placed steel scrap equipment 1 through two symmetrical cutting reserved segments L.

[0043] In steps S2 and S3, each longitudinal cutting line and each transverse cutting line can be cut at multiple points, or they can be cut sequentially in left-right order, but cutting the reserved segment L is strictly prohibited.

[0044] The positioning of the horizontal cutting line is determined comprehensively based on the specifications of the horizontally placed steel scrap equipment 1, the cutting equipment, and the mechanical capabilities.

[0045] The length of the pre-cut section L is determined comprehensively based on the specifications, wall thickness, mechanical equipment capacity, load-bearing capacity of the pre-cut section L, and internal support of the horizontally placed steel scrap equipment 1.

[0046] The longitudinal and transverse cutting lines can be cut using automated equipment or manually, depending on the condition of the outer wall of the horizontally placed steel scrap equipment 1. When cutting manually, an extended rod cutting gun should be used for cutting lines at higher locations.

[0047] Step S4: By cutting the pre-cut section L, remove the front middle section Sq and the rear middle section Sh of each block, so that the arc-shaped upper cover 1-1 falls onto the arc-shaped lower cover 1-2, thereby achieving the destructive dismantling of the horizontally placed steel scrap equipment 1. After confirming that the fallen arc-shaped upper cover 1-1 is stable, the dismantling operation of the arc-shaped upper cover 1-1 and the arc-shaped lower cover 1-2 can be achieved through conventional ground operations.

[0048] Therefore, this invention divides the outer wall of the horizontally placed scrap steel equipment 1 into two major decomposition modules—an arc-shaped upper cover 1-1 and an arc-shaped lower cover 1-2—by the positional distribution of longitudinal and transverse cutting lines, as well as 2N+2 partial decomposition modules located in the middle, including N+1 front-side middle blocks Sq and N+1 rear-side middle blocks Sh. Furthermore, by first cutting the longitudinal and transverse cutting lines and then cutting off the reserved cutting section L, the middle part of the horizontally placed scrap steel equipment 1 is destructively decomposed into N+1 front-side middle blocks Sq and N+1 rear-side middle blocks Sh, and the arc-shaped upper cover 1-1 falls onto the arc-shaped lower cover 1-2, so that the decomposition of the arc-shaped upper cover 1-1 and the arc-shaped lower cover 1-2 can be achieved through conventional ground operations. Thus, the destructive decomposition of the horizontally placed scrap steel equipment 1 is achieved. Therefore, this invention has the advantages of low safety risk, fast construction speed, and low cost.

[0049] Furthermore, the present invention can be implemented using conventional equipment at the construction site by laying the steel scrap equipment 1 horizontally, without the need to configure separate machinery for the dismantling operation.

[0050] Moreover, the construction operation of this invention does not require the erection of scaffolding or working platforms, and there is no work at height, resulting in low safety risks, high decomposition efficiency, and low construction costs.

[0051] The above are the basic embodiments of the present invention, and further optimizations, improvements and limitations can be made based on these basic embodiments:

[0052] Preferably, in steps S2 and S3, the longitudinal cutting line extends in the vertical direction, and the transverse cutting line extends in the horizontal direction; the front middle block Sq and the rear middle block Sh are both rectangular blocks.

[0053] Preferably, in step S4, hydraulic shears are used to tear or cut the pre-cut segment L.

[0054] Preferably, in step S4, the front middle section Sq and the rear middle section Sh, which are symmetrically arranged, are removed in pairs in order from left to right or from right to left, so that the arc-shaped upper cover 1-1 gradually falls onto the arc-shaped lower cover 1-2 from left to right or from right to left during the removal process, thereby improving the safety of the present invention.

[0055] Preferably, in the case where the interior of the horizontally placed steel scrap equipment 1 contains internal support components, in step S4, as the front middle block Sq and the rear middle block Sh, which are arranged symmetrically front and rear, are removed in sequence, the internal support components at the locations of the front middle block Sq and the rear middle block Sh are simultaneously removed to release the constraint of the internal support components on the arc-shaped top cover 1-1.

[0056] This invention is not limited to the specific embodiments described above. Based on the above content and in accordance with common technical knowledge and conventional methods in the field, without departing from the basic technical concept of this invention, this invention can also make other equivalent modifications, substitutions or alterations, all of which fall within the protection scope of this invention.

Claims

1. A method for destructively dismantling horizontally placed steel scrap equipment, applicable to horizontally placed steel scrap equipment obtained by directional tilting and dismantling of steel vertical cylinder equipment (1); Its features are, include: Step S1: Mark the longitudinal cutting line, transverse cutting line and the pre-cutting section for the horizontally placed steel scrap equipment (1); Step S2: According to the layout and marking, cut N pairs of longitudinal cutting lines, where N≥2. Each pair of longitudinal cutting lines includes a front longitudinal cutting line (Zq) and a rear longitudinal cutting line (Zh) arranged symmetrically. Each set of longitudinal cutting lines is evenly spaced along the left and right directions. Step S3: According to the layout marking, cut two sets of horizontal cutting lines arranged symmetrically up and down. The first set of horizontal cutting lines includes N+2 pairs of upper horizontal cutting lines evenly spaced along the left and right direction. Each pair of upper horizontal cutting lines includes a front upper horizontal cutting line (Hqs) and a rear upper horizontal cutting line (Hhs) arranged symmetrically from front to back. The second set of horizontal cutting lines includes N+2 pairs of lower horizontal cutting lines evenly spaced along the left and right direction. Each pair of lower horizontal cutting lines includes a front lower horizontal cutting line (Hqx) and a rear lower horizontal cutting line (Hhx) arranged symmetrically from front to back. Furthermore, the positions of the transverse cutting lines satisfy the following conditions: the first pair of upper transverse cutting lines and lower transverse cutting lines are connected to the left edge (1z) of the horizontally placed steel scrap equipment (1), the last pair of upper transverse cutting lines and lower transverse cutting lines are connected to the right edge (1y) of the horizontally placed steel scrap equipment (1), and the middle N pairs of upper transverse cutting lines and lower transverse cutting lines are respectively connected to the N pairs of longitudinal cutting lines. Therefore, the interval between two adjacent transverse cutting lines is recorded as the cutting reserved segment (L). Each quadrilateral area enclosed by the left edge (1z), right edge (1y), front longitudinal cutting line (Zq), front upper transverse cutting line (Hqs), and front lower transverse cutting line (Hqx) of the horizontally placed steel scrap equipment (1) is recorded as the front middle block (Sq). Each quadrilateral area enclosed by the rear longitudinal cutting line (Zh), the rear upper transverse cutting line (Hhs), and the rear lower transverse cutting line (Hhx) is denoted as the rear middle block (Sh); that is, each front middle block (Sq) and each rear middle block (Sh) are connected to the arc-shaped upper cover (1-1) and arc-shaped lower cover (1-2) of the horizontally placed steel scrap equipment (1) through two symmetrical cutting reserved sections (L); Step S4: By cutting the pre-cut section (L), remove the front middle section (Sq) and rear middle section (Sh) of each block, so that the arc-shaped upper cover (1-1) falls onto the arc-shaped lower cover (1-2), thereby achieving the destructive decomposition of the horizontally placed steel scrap equipment (1).

2. The destructive dismantling method for horizontally placed scrap steel equipment according to claim 1, characterized in that: In steps S2 and S3, the longitudinal cutting line extends in the vertical direction, and the transverse cutting line extends in the horizontal direction; the front middle block (Sq) and the rear middle block (Sh) are both rectangular blocks.

3. The destructive dismantling method for horizontally placed scrap steel equipment according to claim 1 or 2, characterized in that: In step S4, hydraulic shears are used to tear or cut the pre-cut section (L).

4. The destructive dismantling method for horizontally placed scrap steel equipment according to claim 1 or 2, characterized in that: In step S4, the front middle block (Sq) and the rear middle block (Sh) arranged symmetrically are removed in pairs, either from left to right or from right to left.

5. The destructive dismantling method for horizontally placed scrap steel equipment according to claim 4, characterized in that: In the case where the interior of the horizontally placed steel scrap equipment (1) contains internal support components, in step S4, as the front middle block (Sq) and the rear middle block (Sh) arranged symmetrically in pairs are removed in sequence, the internal support components at the locations of the front middle block (Sq) and the rear middle block (Sh) are simultaneously removed.

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