Method and device for repairing local expansion of door frame of equipment access door opening

Abstract

The application discloses a construction method for expanding a door frame locally and breaking and repairing a door frame of an equipment entrance in the technical field of door hole reconstruction construction, and the construction method comprises the following steps: a breaking gap is formed on a door frame body, so that the door frame body is divided into a breaking section and an unbroken section; a steel frame is made from a U-shaped frame plate and a C-shaped side plate; the U-shaped frame plate and the C-shaped side plate are fixed on the door frame body through fasteners, and the C-shaped side plate is fixed at an opening of the U-shaped frame plate; and grouting material is poured into a gap between the C-shaped side plate and the breaking gap. The application locally forms a gap in a door hole, repairs the breaking gap by using a steel frame composed of a U-shaped frame plate and a C-shaped side plate, and leaves a gap between the C-shaped side plate and the breaking gap. After the steel frame structure is installed, the gap is grouted and filled. The door hole reconstruction has low difficulty, and the overall safety of a workshop and the equipment entering efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of doorway renovation construction, specifically to a method and apparatus for partially expanding the doorway frame, breaking and repairing the steel-clad structure for equipment entry and exit. Background Technology

[0002] In industrial buildings such as granulator plants, reinforced concrete frame doorways must accommodate the entry and exit of large equipment. In actual construction, the arrival time of equipment often lags behind the completion of the main doorway structure, leading to a mismatch between the design dimensions and the equipment's dimensions, making the doorway unable to accommodate the equipment. Traditional solutions require the complete demolition or large-scale removal of the doorway structure, which is not only a massive undertaking with a long construction period but also consumes significant manpower and resources. Post-demolition repairs typically employ conventional reinforcement methods, which suffer from low structural reinforcement efficiency and insufficient reliability, impacting the overall safety of the plant and the efficiency of equipment access. Summary of the Invention

[0003] The purpose of this invention is to provide a method and apparatus for partially expanding and repairing steel-clad door frames in equipment entry and exit gates, which solves the problem that existing methods for modifying equipment entry and exit gates involve large amounts of work and consume a lot of manpower and resources.

[0004] The present invention achieves the above objectives through the following technical solutions: A method for partially widening and repairing the steel frame of a doorway for equipment entry and exit, including the following steps: 1) A breaking notch is made in the door frame body, and the door frame body is divided into a breaking section and an unbreaking section according to the breaking notch; 2) Construct a steel-clad frame consisting of a U-shaped frame plate and C-shaped side plates, wherein the U-shaped frame plate of the steel-clad frame has an opening on one side of the middle section corresponding to the breaking notch; 3) Fix the U-shaped frame plate and C-shaped side plate to the door frame body with fasteners, fully weld the connection between the fasteners and the U-shaped frame plate and the C-shaped side plate, and fix the C-shaped side plate to the opening of the U-shaped frame plate to seal the breaking gap, forming a gap between the C-shaped side plate and the breaking section. 4) Inject grout into the gap and cut off the part of the fastener that protrudes beyond the surface of the steel C-shaped side plate.

[0005] As a further optimization of the present invention, the method for manufacturing the steel jacket is as follows: Two steel plates are used as the inner and outer plates. C-shaped notches corresponding to the breaking notches are made on the inner and outer plates. Two connecting plates are set between the inner and outer plates. The two connecting plates are welded to the upper and lower sides of the C-shaped notches respectively. Multiple ear plates are welded on the side of the inner and outer plates away from the C-shaped notches to form a U-shaped frame plate. C-shaped side plates are made by welding multiple steel plates or bending a single steel plate, forming a vertical section and two inclined sections located on the upper and lower sides of the vertical section on the C-shaped side plate. After the U-shaped frame plate and C-shaped side plate are fixed to the door frame body with fasteners, the steel cladding is formed.

[0006] As a further optimization of the present invention, during the process of tightening the steel casing, fastening bolts and fastening anchors are driven into the unbroken section and the broken section respectively. Leveling nuts one and two are installed on the fastening bolts and fastening anchors respectively, and the positions of leveling nuts one and two are adjusted so that the fastening bolts penetrate the connecting plate. A clamping nut one is installed on the fastening bolt to tighten the connecting plate, so that the U-shaped casing plate is snapped onto the door frame body. The two connecting plates are fixed on the unbroken sections on the upper and lower sides of the broken section respectively. The ear plates set on both sides of the door frame body are tightened by tie bolts. The inner side plate and the outer side plate are tightened by tie anchors. The C-shaped side plate is embedded into the broken notch so that the fastening anchors penetrate the C-shaped side plate. A clamping nut two is installed on the fastening anchor to tighten the C-shaped side plate.

[0007] As a further optimization of the present invention, when manufacturing the steel frame, a first lifting lug is installed on the connecting plate on the upper side of the U-shaped frame plate, and a second lifting lug is installed on the vertical section of the C-shaped side plate. A chain hoisting mechanism for connecting the second lifting lug is suspended on the first lifting lug to lift the C-shaped side plate.

[0008] As a further optimization of the present invention, when manufacturing the C-shaped side plate, a grouting port is opened at the top of the inclined section on the upper side of the C-shaped side plate. When injecting grout, the grout is injected into the gap through a guide. After injecting the grout, a steel plate is welded at the grouting port to seal the grouting port.

[0009] The equipment includes a steel-clad door frame repair and demolition device for partially widening and repairing door openings. The device comprises a steel-clad door frame consisting of a U-shaped frame plate and C-shaped side plates. The door frame has a demolition notch and a demolition section. The demolition notch is located on the demolition section, with the undemolished sections of the door frame forming the upper and lower sides. One side of the U-shaped frame plate has an opening corresponding to the demolition notch. The C-shaped side plates are fixed to the opening of the U-shaped frame plate. The U-shaped frame plate and C-shaped side plates are secured to the door frame with fasteners. A gap is formed between the C-shaped side plates and the demolition section, and grout is injected into the gap.

[0010] As a further optimization of the present invention, the U-shaped frame plate includes an inner side plate and an outer side plate. Both the inner side plate and the outer side plate are provided with a C-shaped notch on one side corresponding to the breaking notch. Two connecting plates are provided between the inner side plate and the outer side plate. The two connecting plates are respectively welded to the upper and lower sides of the C-shaped notch. Multiple ear plates are welded to the side of the inner side plate and the outer side plate away from the C-shaped notch. The ear plates on the inner side plate correspond one-to-one with the ear plates on the outer side plate. The C-shaped side plate has a vertical section, and the upper and lower sides of the vertical section are bent along the C-shaped notch to form two inclined sections.

[0011] As a further optimization of the present invention, the fasteners are divided into fastener one, fastener two and fastener three for fixing the U-shaped frame plate, and fastener four for fixing the C-shaped side plate. Fastener 1 is a tie bolt that penetrates the paired ear plates; fastener 2 is a tie anchor that penetrates the inner and outer side plates; fastener 3 includes a fastening bolt that penetrates the connecting plate and is embedded in the unbroken section, with a leveling nut 1 and a clamping nut 1 threadedly connected to the fastening bolt, the leveling nut 1 and the clamping nut 1 being located on opposite sides of the connecting plate; fastener 4 includes a fastening anchor that penetrates the C-shaped side plate and is embedded in the broken section, with a leveling nut 2 and a clamping nut 2 threadedly connected to the fastening anchor, the leveling nut 2 and the clamping nut 2 being located on opposite sides of the C-shaped side plate; the vertical section has a through hole 1 for the fastening anchor to pass through; the inclined section has a through hole 2 for the fastening anchor to pass through; the cross-sectional area of ​​the through hole 2 is larger than the cross-sectional area of ​​the fastening anchor.

[0012] As a further optimization of the present invention, a first lifting lug is provided on the connecting plate on the upper side of the U-shaped frame plate, and a second lifting lug is provided on the vertical section of the C-shaped side plate. The first lifting lug is provided with a chain hoisting mechanism for connecting the second lifting lug.

[0013] As a further optimization of the present invention, a grouting port is provided at the top of the inclined section on the upper side of the C-shaped side plate, and the construction device also includes a guide for guiding the grout at the grouting port.

[0014] The beneficial effects of this invention are as follows: This invention involves creating a breach in a localized area of ​​the doorway and repairing the breach using a specialized steel-clad structure consisting of a U-shaped frame plate and C-shaped side plates. A gap is left between the C-shaped side plates and the breach to allow for leveling and tightening of the C-shaped side plates. A grouting port is set between the U-shaped frame plate and the C-shaped side plates. After the steel-clad structure is installed, the gap is filled with grout. This reduces the difficulty of doorway modification, saves manpower and resources, and ensures that the modified equipment entrance and exit doorways are sturdy and reliable, thereby improving the overall safety of the factory and the efficiency of equipment entry. This invention uses tie bolts and tie anchors to fasten the ear plates, inner and outer side plates of the U-shaped frame plate, and uses fastening bolts and fastening anchors in conjunction with leveling nuts and clamping nuts to fasten the connecting plate and C-shaped side plate. The U-shaped frame plate and C-shaped side plate have good leveling and clamping effects, and the steel-encased structure can provide strong reinforcement for the broken gap in the doorway. The present invention installs a first lifting lug on the U-shaped frame plate and a second lifting lug on the C-shaped side plate. The relatively heavy C-shaped side plate is lifted by a chain hoisting mechanism between the first and second lifting lugs, which further saves manpower and reduces the difficulty of steel-cladding installation. Attached Figure Description

[0015] Figure 1 This is a flowchart of the construction method of the present invention; Figure 2 This is a schematic diagram of the overall structure of the construction device of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the steel-clad frame of the present invention; Figure 4 This is a cross-sectional view of the steel casing of the present invention; Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 for Figure 4 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the working state of the construction device of the present invention when injecting grout; In the diagram: 1. U-shaped frame plate; 2. C-shaped side plate; 3. Fastener 1; 4. Fastener 2; 5. Fastener 3; 6. Fastener 4; 7. Chain hoist lifting mechanism; 8. Guide component; 11. Inner side plate; 12. Outer side plate; 13. Connecting plate; 14. Ear plate; 15. First lifting lug; 21. Vertical section; 22. Inclined section; 23. Through hole 1; 24. Through hole 2; 25. Second lifting lug; 26. Grouting port; 51. Fastening bolt; 52. Leveling nut 1; 53. Tightening nut 1; 61. Fastening anchor bolt; 62. Leveling nut 2; 63. Tightening nut 2; D. Door frame body; S1. Demolished section; S2. Undemolished section; G. Gap. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] During the construction of the reinforced concrete frame doorway of a granulator plant, the following problems may arise: Generally, the granulator arrives on site relatively late, and the doorway frame has already been completed before the granulator arrives. Because this situation was not considered in the design, and the dimensions of the granulator designed by the designer may differ from the actual dimensions of the purchased granulator, the main unit of the granulator may be larger than the doorway. Therefore, the granulator cannot enter the plant, and the only solution is to modify the doorway by removing the obstructing portion, reinforcing the demolished area, and repairing the damaged doorway. Existing doorway modification methods require complete demolition or large-scale demolition of the doorway, resulting in a large workload, long construction time, and significant consumption of manpower and resources.

[0018] First Embodiment like Figure 1-6 As shown, this embodiment relates to a method for partially expanding and repairing the steel frame of an equipment entrance / exit opening. When the size of the entrance / exit of a granulator plant is insufficient for the granulator to enter, this embodiment can be used to enlarge the reinforced concrete entrance / exit opening, followed by steel reinforcement for the doorway modification. It should be noted that this embodiment uses a granulator as an example to illustrate this construction method; however, this method can also be applied to the modification of entrance / exit openings for other equipment. The construction method includes the following steps: Step 1: Make a notch in the door frame body D of the doorway. Divide the door frame body D into a broken section S1 and two unbroken sections S2, with the upper and lower edges of the notch as the boundary. The broken section S1 is located between the two unbroken sections S2.

[0019] Step 2: Fabricate the steel-clad frame consisting of a U-shaped frame plate 1 and C-shaped side plates 2. An opening corresponding to the breaking notch is made on one side of the middle of the U-shaped frame plate 1. The depth of this opening is shallower than the depth of the breaking notch to provide sufficient space for the installation of the connecting plate 13 of the U-shaped frame plate 1 and the C-shaped side plates 2.

[0020] like Figure 3 As shown, the U-shaped frame plate 1 includes an inner side plate 11 and an outer side plate 12. Both the inner side plate 11 and the outer side plate 12 have a C-shaped notch on one side corresponding to the breaking notch. Two connecting plates 13 are provided between the inner side plate 11 and the outer side plate 12, respectively welded to the upper and lower sides of the C-shaped notch. Multiple ear plates 14 are welded to the side of the inner side plate 11 and the outer side plate 12 away from the C-shaped notch, with each ear plate 14 on the inner side plate 11 corresponding to one on the outer side plate 12. The C-shaped side plate 2 has a vertical section 21, and the vertical section 21 of the C-shaped side plate 2 bends along the C-shaped notch on both the upper and lower sides to form two inclined sections 22.

[0021] Step 3: Fix the U-shaped frame plate 1 and the C-shaped side plate 2 to the door frame body D using fasteners. Fully weld the connection between the fasteners and the U-shaped frame plate 1 and the C-shaped side plate 2, and fix the C-shaped side plate 2 to the opening of the U-shaped frame plate 1 to seal the breaking gap. A gap G is formed between the C-shaped side plate 2 and the breaking section S1.

[0022] The fasteners are divided into four groups: a group of fasteners 1-3 for fixing the ear plate 14 of the U-shaped frame plate 1, a group of fasteners 2-4 for fixing the inner side plate 11 and the outer side plate 12, a group of fasteners 3-5 for fixing the connecting plate 13, and a group of fasteners 4-6 for fixing the C-shaped side plate 2.

[0023] Please refer to Figure 3-6 Fastener 1 3 is a tie bolt that passes through the paired ear plates 14. Fastener 2 4 is a tie anchor that passes through the inner side plate 11 and the outer side plate 12. Fastener 3 5 includes a fastening bolt 51 that passes through the connecting plate 13 and is embedded in the unbroken section S2. The fastening bolt 51 is threaded with a leveling nut 1 52 and a clamping nut 1 53. The leveling nut 1 52 and the clamping nut 1 53 are located on both sides of the connecting plate 13. Fastener 4 6 includes a fastening anchor 61 that passes through the C-shaped side plate 2 and is embedded in the broken section S1. The fastening anchor 61 is threaded with a leveling nut 2 62 and a clamping nut 2 63. The leveling nut 2 62 and the clamping nut 2 63 are located on both sides of the C-shaped side plate 2. The vertical section 21 is provided with a through hole 1 23 for the fastening anchor 61 to pass through. The inclined section 22 is provided with a through hole 2 24 for the fastening anchor 61 to pass through.

[0024] Step 4: Inject grout into the gap G and cut off the portion of fastener 4 6 that protrudes beyond the surface of the steel-clad C-shaped side plate 2. Additionally, if fastener 3 5 obstructs the granulation mechanism, also cut off the portion of fastener 3 5 that protrudes beyond the surface of the connecting plate 13. Specifically, the surface of the steel-clad C-shaped side plate 2 refers to the side of the C-shaped side plate 2 away from the inner side plate 11 and the outer side plate 12; similarly, the surface of the connecting plate 13 refers to the side of the connecting plate 13 away from the inner side plate 11 and the outer side plate 12.

[0025] The manufacturing method of Baogang is as follows: Two steel plates are used as the inner side plate 11 and the outer side plate 12. C-shaped notches corresponding to the breaking notches are made on the inner side plate 11 and the outer side plate 12. Two connecting plates 13 are set between the inner side plate 11 and the outer side plate 12. The two connecting plates 13 are welded to the upper and lower sides of the C-shaped notches respectively. Multiple ear plates 14 are welded to the side of the inner side plate 11 and the outer side plate 12 away from the C-shaped notches. The first lifting lug 15 is installed on the connecting plate 13 on the upper side of the U-shaped frame plate 1 to form the U-shaped frame plate 1. The C-shaped side plate 2 is made by welding multiple steel plates or bending a single steel plate, so that the C-shaped side plate 2 forms a vertical section 21 and two inclined sections 22 located on the upper and lower sides of the vertical section 21. The second lifting lug 25 is installed on the vertical section 21 of the C-shaped side plate 2. A grouting port 26 is opened at the top of the inclined section 22 on the upper side of the C-shaped side plate 2. After the U-shaped frame plate 1 and the C-shaped side plate 2 are fixed to the door frame body D with fasteners, the steel is formed.

[0026] During the steel reinforcement process, fastening bolts 51 and anchor bolts 61 are driven into the unremoved section S2 and the removed section S1, respectively. Leveling nuts 52 and 62 are installed on the fastening bolts 51 and anchor bolts 61, respectively, and their positions are adjusted. The U-shaped frame plate 1 is snapped onto the door frame body D, with the two connecting plates 13 positioned close to the unremoved sections S2 on the upper and lower sides of the removal notch. The fastening bolts 51 penetrate the connecting plates 13, and the connecting plates 13 are positioned and leveled using the leveling nuts 52. A clamping nut 53 is installed on the fastening bolts 51 to tighten the connecting plates 13. The two connecting plates 13 are then fixed to the unremoved sections S2 on the upper and lower sides of the removed section S1.

[0027] The ear plates 14, located on both sides of the door frame body D, are fastened with tie bolts, and the inner side plate 11 and outer side plate 12 are fastened with tie anchors. The C-shaped side plate 2 is inserted into the notch, and leveled using the second leveling nut 62, so that the fastening anchor 61 passes through the C-shaped side plate 2. A second clamping nut 63 is installed on the fastening anchor 61 to fasten the C-shaped side plate 2. Then, the C-shaped side plate 2 is welded together with the inner side plate 11, the outer side plate 12, and the two connecting plates 13. The gap between the top of the upper steel-clad connecting plate 13 and the door frame body D is fully welded, and the gap between the bottom of the lower steel-clad connecting plate 13 and the door frame body D is also fully welded. Alternatively, in some other embodiments, the connecting plates 13 may be fastened using only bolts.

[0028] During grouting, the grout is injected into the gap G through the guide 8. After grouting, a steel plate is welded at the grouting port 26. The connection between the steel plate and the inclined section 22 on the upper side of the C-shaped side plate 2, as well as the connection between the steel plate and the connecting plate 13 of the U-shaped frame plate 1, is fully welded, thereby sealing the grouting port 26. Figure 7 As shown, the guide element 8 is preferably a hopper specifically for grouting.

[0029] A chain hoist 7 for connecting to the second lifting lug 25 is suspended on the first lifting lug 15. When installing the C-shaped side plate 2, the upper end of the chain hoist 7 is suspended on the first lifting lug 15, and the lower end of the chain hoist 7 is connected to the second lifting lug 25 on the C-shaped side plate 2. The C-shaped side plate 2 is then hoisted by operating the chain hoist 7. The chain hoist 7 is preferably a lever hoist. In this embodiment, the first lifting lug 15 is not removed after construction and is reserved for later maintenance. The second lifting lug 25 is removed after all construction is completed. Alternatively, in other embodiments, if the first lifting lug 15 obstructs equipment from entering or exiting a doorway, it can also be removed after construction is completed.

[0030] Second Embodiment like Figure 2-6 As shown, this embodiment relates to a construction device for partially expanding and repairing a door frame in an equipment entry / exit gate using a steel-clad frame. This construction device is applicable to the construction method described in the previous embodiment. The construction device includes a steel-clad frame installed on the door frame body D. The steel-clad frame consists of a U-shaped frame plate 1 and a C-shaped side plate 2. A breaking notch is provided on the door frame body D, and a breaking section S1 is provided on the door frame body D. The breaking notch is located on the breaking section S1, and the upper and lower sides of the breaking notch are the unbroken sections S2 of the door frame body D. The U-shaped frame plate 1 of the steel-clad frame has an opening on one side of the middle section corresponding to the breaking notch. The C-shaped side plate 2 is fixed at the opening of the U-shaped frame plate 1. The U-shaped frame plate 1 and the C-shaped side plate 2 are fixed to the door frame body D by fasteners. A gap G is formed between the C-shaped side plate 2 and the breaking section S1, and grout is injected into the gap G.

[0031] The U-shaped frame plate 1 includes an inner side plate 11 and an outer side plate 12. Both the inner side plate 11 and the outer side plate 12 have a C-shaped notch on one side corresponding to the breaking notch. Two connecting plates 13 are provided between the inner side plate 11 and the outer side plate 12. The two connecting plates 13 are welded to the upper and lower sides of the C-shaped notch respectively. Multiple ear plates 14 are welded to the side of the inner side plate 11 and the outer side plate 12 away from the C-shaped notch. The ear plates 14 on the inner side plate 11 correspond one-to-one with the ear plates 14 on the outer side plate 12. The C-shaped side plate 2 has a vertical section 21. The vertical section 21 is bent along the C-shaped notch on both the upper and lower sides to form two inclined sections 22.

[0032] The fasteners are divided into fastener 1 (3), fastener 2 (4), and fastener 3 (5) for fixing the U-shaped frame plate 1, and fastener 4 (6) for fixing the C-shaped side plate 2. Fastener 1 (3) is a tie bolt that penetrates the paired ear plates 14; fastener 2 (4) is a tie anchor that penetrates the inner side plate 11 and the outer side plate 12; fastener 3 (5) includes a fastening bolt 51 that penetrates the connecting plate 13 and is embedded in the unbroken section S2; the fastening bolt 51 is threaded with a leveling nut 52 and a clamping nut 53, which are located on both sides of the connecting plate 13; fastener 4 (6) includes a through C-type... Side plate 2 is embedded with fastening anchor bolt 61 of breaking section S1. Fastening anchor bolt 61 is threaded with leveling nut 2 62 and clamping nut 2 63. Leveling nut 2 62 and clamping nut 2 63 are located on both sides of C-shaped side plate 2. Vertical section 21 is provided with through hole 1 23 for fastening anchor bolt 61 to pass through. Inclined section 22 is provided with through hole 24 for fastening anchor bolt 61 to pass through. The cross-sectional area of ​​through hole 24 is larger than the cross-sectional area of ​​fastening anchor bolt 61.

[0033] In this embodiment, the cross-section of the second through hole 24 is oblong. In other embodiments, the second through hole 24 can also be set into an elliptical or other elongated shape, as long as it can ensure that the second through hole 24 can accommodate the inclined fastening anchor 61. The elongated shape of the second through hole 24 ensures that the fastening anchor 61 can be inserted smoothly, and also allows the inclined section 22 to have a large contact area with the leveling nut 62, improving the positioning and leveling effect.

[0034] A first lifting lug 15 is provided on the connecting plate 13 on the upper side of the U-shaped frame plate 1, and a second lifting lug 25 is provided on the vertical section 21 of the C-shaped side plate 2. A chain hoist lifting mechanism 7 for connecting the first lifting lug 15 is provided on the first lifting lug 15. The chain hoist lifting mechanism 7 is preferably a lever hoist. Since the C-shaped side plate 2 is large and heavy, it can be hoisted using a lever hoist, reducing construction difficulty and saving labor burden. In this embodiment, the door frame body D of the doorway is relatively thin. If the door frame body D were thicker, the C-shaped side plate 2 would be even heavier. Using the aforementioned lever hoist can significantly save labor. Furthermore, the chain hoist lifting mechanism 7 can be installed on a crane, and its lower end can be connected to the first lifting lug 15, allowing for the hoisting of the U-shaped frame plate 1, further saving manpower. Additionally, as... Figure 3 and 7 As shown, a grouting port 26 is provided at the top of the inclined section 22 on the upper side of the C-shaped side plate 2. The construction device also includes a guide element 8 for guiding the grout through the grouting port 26. The guide element 8 is preferably a special grouting scoop, which guides the grout into the gap G to reinforce the opening and remove the gap. After grouting is completed, a steel plate is welded to the grouting port to seal the steel ladle.

[0035] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A method for partially widening and repairing the steel frame of an equipment entrance / exit gate, characterized in that... Includes the following steps: 1) A breaking notch is made in the door frame body, and the door frame body is divided into a breaking section and an unbreaking section according to the breaking notch; 2) Construct a steel-clad frame consisting of a U-shaped frame plate (1) and a C-shaped side plate (2), wherein the U-shaped frame plate (1) of the steel-clad frame has an opening on one side of the middle part corresponding to the breaking notch; 3) Fix the steel plate to the door frame body with fasteners, fully weld the connection between the fasteners and the steel plate, and fix the C-shaped side plate (2) at the opening of the U-shaped frame plate (1), forming a gap between the C-shaped side plate (2) and the breaking section. 4) Inject grout into the gap and cut off the part of the fastener that protrudes beyond the surface of the steel-clad C-shaped side plate (2); The method for manufacturing the steel jacket is as follows: Two steel plates are used as inner plate (11) and outer plate (12). C-shaped notches corresponding to the breaking notches are made on the inner plate (11) and outer plate (12). Two connecting plates (13) are set between the inner plate (11) and outer plate (12). The two connecting plates (13) are welded to the upper and lower sides of the C-shaped notches respectively. Multiple ear plates (14) are welded on the side of the inner plate (11) and outer plate (12) away from the C-shaped notches to form a U-shaped frame plate (1). The C-shaped side plate (2) is made by welding multiple steel plates or bending a single steel plate, so that a vertical section (21) and two inclined sections (22) located on the upper and lower sides of the vertical section (21) are formed on the C-shaped side plate (2). After the U-shaped frame plate (1) and the C-shaped side plate (2) are fixed to the door frame body by fasteners, the steel cladding is formed; When making the steel frame, a first lifting lug (15) is installed on the connecting plate (13) on the upper side of the U-shaped frame plate (1), and a second lifting lug (25) is installed on the vertical section (21) of the C-shaped side plate (2). A chain hoisting mechanism (7) for connecting the second lifting lug (25) is suspended on the first lifting lug (15) to hoist the C-shaped side plate (2).

2. The method for partially expanding and repairing the steel frame of the equipment entrance / exit gate according to claim 1, characterized in that: During the process of tightening the steel plate, fastening bolts (51) and fastening anchors (61) are driven into the unbroken section and the broken section respectively. Leveling nuts one (52) and leveling nuts two (62) are installed on the fastening bolts (51) and the fastening anchors (61) respectively, so that the fastening bolts (51) penetrate the connecting plate (13). A clamping nut one (53) is installed on the fastening bolts (51) to tighten the connecting plate (13), so that the two connecting plates (13) are fixed on the unbroken sections on the upper and lower sides of the broken section respectively. The paired ear plates (14) are tightened by tie bolts, and the inner side plate (11) and the outer side plate (12) are tightened by tie anchors. The C-shaped side plate (2) is embedded into the broken gap, so that the fastening anchors (61) penetrate the C-shaped side plate (2). A clamping nut two (63) is installed on the fastening anchors (61) to tighten the C-shaped side plate (2).

3. The method for partially expanding and repairing the steel frame of the equipment entrance / exit gate according to claim 2, characterized in that: When making the C-shaped side plate (2), a grouting port (26) is opened at the top of the inclined section (22) on the upper side of the C-shaped side plate (2). When grouting, the grout is injected into the gap through the guide (8).

4. A construction device for partially widening and repairing the steel-clad door frame of an equipment entrance / exit, the construction device comprising a steel-clad door frame installed on the door frame body, characterized in that: The construction device is applicable to the construction method described in claim 3. The steel frame is composed of a U-shaped frame plate (1) and a C-shaped side plate (2). A breaking notch is provided on the door frame body. A breaking section is provided on the door frame body. The breaking notch is located on the breaking section. The upper and lower sides of the breaking notch are the unbroken sections of the door frame body. The U-shaped frame plate (1) of the steel frame has an opening on one side of the middle part corresponding to the breaking notch. The C-shaped side plate (2) is fixed at the opening of the U-shaped frame plate (1). The U-shaped frame plate (1) and the C-shaped side plate (2) are fixed on the door frame body by fasteners. A gap is formed between the C-shaped side plate (2) and the breaking section. Grout is injected into the gap.

5. The equipment entry / exit door frame partial expansion and repair steel-cladding construction device according to claim 4, characterized in that: The U-shaped frame plate (1) includes an inner side plate (11) and an outer side plate (12). Both the inner side plate (11) and the outer side plate (12) have a C-shaped notch on one side corresponding to the breaking notch. Two connecting plates (13) are provided between the inner side plate (11) and the outer side plate (12). The two connecting plates (13) are welded to the upper and lower sides of the C-shaped notch respectively. Multiple ear plates (14) are welded to the side of the inner side plate (11) and the outer side plate (12) away from the C-shaped notch. The ear plates (14) on the inner side plate (11) correspond one-to-one with the ear plates (14) on the outer side plate (12). The C-shaped side plate (2) has a vertical section (21). The vertical section (21) bends along the C-shaped notch on both the upper and lower sides to form two inclined sections (22).

6. The equipment entry / exit door frame partial expansion and repair steel-cladding construction device according to claim 5, characterized in that: The fasteners are divided into fastener one (3), fastener two (4) and fastener three (5) for fixing the U-shaped frame plate (1), and fastener four (6) for fixing the C-shaped side plate (2). The first fastener (3) is a tie bolt that penetrates the paired ear plates (14); the second fastener (4) is a tie anchor that penetrates the inner side plate (11) and the outer side plate (12); the third fastener (5) includes a fastening bolt (51) that penetrates the connecting plate (13) and is embedded in the unbroken section, and the fastening bolt (51) is threaded with a leveling nut (52) and a clamping nut (53), and the leveling nut (52) and the clamping nut (53) are located on both sides of the connecting plate (13); the fourth fastener (6) includes a through C-type The side plate (2) is embedded with a fastening anchor (61) of the breaking section. The fastening anchor (61) is threaded with a leveling nut (62) and a clamping nut (63). The leveling nut (62) and the clamping nut (63) are located on both sides of the C-shaped side plate (2). The vertical section (21) is provided with a through hole (23) for the fastening anchor (61) to pass through. The inclined section (22) is provided with a through hole (24) for the fastening anchor (61) to pass through. The cross-sectional area of ​​the through hole (24) is larger than that of the fastening anchor (61).

7. The equipment entry / exit door frame partial expansion and repair steel-cladding construction device according to claim 5, characterized in that: The U-shaped frame plate (1) has a first lifting lug (15) on the connecting plate (13) on the upper side, and the C-shaped side plate (2) has a second lifting lug (25) on the vertical section (21). The first lifting lug (15) has a chain hoisting mechanism (7) for connecting the second lifting lug (25).

8. The equipment entry / exit door frame partial expansion and repair steel-cladding construction device according to claim 5, characterized in that: The top of the inclined section (22) on the upper side of the C-shaped side plate (2) is provided with a grouting port (26), and the construction device also includes a guide (8) for backflowing grout at the grouting port (26).

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