Supporting device for installation of underground space protective air-tight door

Abstract

The invention belongs to the technical field of supporting equipment, and relates to a supporting device for mounting an underground space protective air-tight door, which comprises eight L-shaped angle plates, four inclined supporting rods and four hinged bases, wherein four L-shaped angle plates are used for being installed at the four corners of the inner side of a door frame and distributed in a rectangular mode, every two of the other four L-shaped angle plates are welded to form a T-shaped supporting plate, and the two T-shaped supporting plates are used for being installed on the inner side of the door frame and distributed in a vertically symmetrical mode. A vertical supporting rod is arranged between every two vertically-opposite L-shaped angle plates. Horizontal supporting rods are arranged between each T-shaped supporting plate and the L-shaped angle plates on the left side and the right side of the T-shaped supporting plate; the top ends of the two inclined supporting rods are detachably connected with the L-shaped angle plate at the top corner of the left side, and the top ends of the other two inclined supporting rods are detachably connected with the L-shaped angle plate at the top corner of the right side. The supporting device is of an assembly type structure, welding fire operation is not needed, common workers can conduct construction operation, dismounting and mounting are convenient and fast, and dismounting and mounting can be fast.

Description

Technical Field

[0001] The invention belongs to the technical field of supporting equipment, and in particular relates to a supporting device for installing an underground space protective closed door. Background Art

[0002] Underground space (referring to underground tunnels, basements, underground parking lots, underground passages, etc.) protective closed doors are an important part of civil air defense projects and are key facilities to ensure the safety of underground spaces in various emergency situations. When installing underground space protective closed doors, the door frame is generally cast in one piece with the concrete wall to ensure its firmness. Before pouring the concrete, the door frame needs to be tied and fixed to the reinforcement of the concrete wall, and the door frame is supported by a supporting structure.

[0003] Common support structures include oblique supports (steel plates, steel pipes, and steel sections, etc.) and vertical supports (steel plates, steel pipes, and steel sections, etc.) welded on the inside of the door frame, which are used to prevent the door frame from being deformed during concrete pouring; in addition, they also include oblique support rods welded on both sides of the door frame to prevent the door frame from falling over. The existing support structure and the door frame are generally connected by welding, which not only requires welders to perform hot work, which poses a safety hazard and harms the health of workers, but also requires cutting and hot work when removing the support structure, which still has the above problems; in addition, it is difficult to control the quality of welding the support structure during installation and cutting the support structure during removal, and the operation is time-consuming and labor-intensive, and the operation period is long. Summary of the invention

[0004] The purpose of the present invention is to provide a support device for installing underground space protective closed doors. The support device is a prefabricated structure, does not require hot work, and ordinary workers can perform construction work. It is easy to assemble and disassemble, so as to solve the problems raised in the above background technology.

[0005] The present invention is achieved through the following technical solutions:

[0006] A support device for installing an underground space protective airtight door, the protective airtight door comprises a door frame, the support device is used to support the door frame when the door frame is installed, and the support device comprises eight L-shaped angle plates; four of the L-shaped angle plates are used to be installed at four corners of the inner side of the door frame and are distributed in a rectangular shape, and both outer side walls of the L-shaped angle plates are in contact with the inner side walls of the door frame; the other four L-shaped angle plates are welded in pairs to form a T-shaped support plate, and the two T-shaped support plates are used to be installed on the inner side of the door frame and are distributed symmetrically up and down, and the T-shaped support plate is located between the left and right L-shaped angle plates;

[0007] A vertical support rod is provided between two L-shaped angle plates that are opposite to each other in the eight L-shaped angle plates. Both ends of the vertical support rod are detachably connected to the L-shaped angle plates. When installing the door frame, the four vertical support rods can vertically stabilize the eight L-shaped angle plates and form a vertical support on the inner side of the door frame to prevent the door frame from being squeezed and deformed by vertical pressure.

[0008] A horizontal support rod is provided between each T-shaped support plate and its left L-shaped angle plate and its right L-shaped angle plate. Both ends of the horizontal support rod are detachably connected to the L-shaped angle plates. When installing the door frame, the four horizontal support rods can stabilize the eight L-shaped angle plates horizontally and form a horizontal support on the inner side of the door frame to prevent the door frame from being squeezed and deformed by the horizontal pressure.

[0009] The supporting device also includes four oblique support rods and four hinged bases, and the four hinged bases are respectively installed at the bottom ends of the four oblique support rods; the top ends of two of the oblique support rods are detachably connected to the L-shaped angle plate at the left top corner, and the two oblique support rods are opposite to each other front and back; the top ends of the other two oblique support rods are detachably connected to the L-shaped angle plate at the right top corner, and the two oblique support rods are opposite to each other front and back; when installing the door frame, the four hinged bases can be anchored to the ground or embedded in the ground with anchor nails, and the four oblique support rods can form oblique supports on the front and back sides of the door frame to prevent the door frame from falling over.

[0010] According to a further limitation, the vertical support rods, the horizontal support rods and the diagonal support rods are all telescopic rod structures.

[0011] According to further definition, the vertical support rod includes two first rod members and a first turning handle; first screw rods are fixedly provided at both ends of the first turning handle, and the external threads on the two first screw rods have opposite rotation directions, one end of the two first rod members are respectively threadedly connected to the two first screw rods, and the length of the first screw rod screwed into the first rod member can be adjusted by rotating the first turning handle forward or reversely, thereby adjusting the overall length of the vertical support rod; U-shaped pressure plates are fixedly provided at the other ends of the two first rod members.

[0012] According to further limitations, a T-shaped limit block extending in the left-right direction is welded to the inner side wall of the top plate or the inner side wall of the bottom plate of each L-shaped angle plate, and two slide grooves distributed front and back are formed between the T-shaped limit block and the L-shaped angle plate. Limiting slide plates are fixedly provided at the front and rear ends of the opening of each U-shaped pressure plate, and the two limiting slide plates are respectively slidably matched with the two slide grooves.

[0013] According to a further limitation, a positioning plate is fixedly provided on the inner end of each T-shaped limit block, and the positioning plate can be used for positioning.

[0014] Further definition, the inner wall of each L-shaped angle plate is welded with two ribs spaced front and back, and a bolt and nut assembly is installed between the two ribs; the horizontal support rod includes two second rods and a second turning handle; second screws are fixedly provided at both ends of the second turning handle, and the external threads on the two second screws are rotated in opposite directions, one end of the two second rods is respectively threadedly connected to the two second screws, and the length of the second screw screwed into the second rod can be adjusted by rotating the second turning handle forward or reversely, thereby adjusting the overall length of the horizontal support rod; the other ends of the two second rods are respectively mounted on the two left and right bolts.

[0015] Further definition, the front and rear sides of the L-shaped angle plate at the left top corner and the front and rear sides of the L-shaped angle plate at the right top corner are provided with U-shaped hinged seats, and the two U-shaped hinged seats are fixed to the two ribs on the L-shaped angle plate by bolt and nut assemblies; the oblique support rod comprises two third rods and a third turning handle; third screws are fixedly provided at both ends of the third turning handle, and the external threads on the two third screws rotate in opposite directions, one end of the two third rods are respectively threadedly connected with the two third screws, and the length of the third screw screwed into the third rod can be adjusted by rotating the third turning handle forward or reversely, thereby adjusting the overall length of the oblique support rod; the other ends of the two third rods are respectively hinged to the hinge base and the U-shaped hinged seat by bolt and nut assemblies.

[0016] According to further limitations, the outer side wall of each L-shaped angle plate is fixedly provided with two limit flanges spaced front and rear. When the outer side wall of the L-shaped angle plate abuts against the inner side wall of the door frame, the two limit flanges spaced front and rear can clamp the door frame from the front and rear sides, thereby preventing the L-shaped angle plate from detaching from the door frame from the front and rear directions.

[0017] Further defined, the installation method of the support device for supporting the door frame is as follows:

[0018] Step 1: Install four L-shaped angle plates at the four corners of the inner side of the door frame, install a vertical support rod between the upper and lower L-shaped angle plates for vertical support, install two T-shaped support plates facing each other in the middle of the inner side of the door frame, and install two vertical support rods between the two T-shaped support plates for vertical support;

[0019] Step 2: Install horizontal support rods between the T-shaped support plate and the left and right L-shaped angle plates for lateral support;

[0020] Step 3: Install four oblique support rods for oblique support;

[0021] Step 4: respectively twist the first turning handle, the second turning handle and the third turning handle to pre-tighten the telescopic rod to form a stable vertical support, a horizontal support and a diagonal support for the door frame.

[0022] Further defined, the method for removing the support device is as follows:

[0023] Step 1: Remove the bolt and nut assembly between the top of the diagonal support rod and the U-shaped hinge seat to remove each diagonal support rod and remove the hinge seat from the ground;

[0024] Step 2: Remove each horizontal support rod to eliminate the lateral support;

[0025] Step three, turn each first turning handle to shorten the vertical support rod, eliminate the vertical support, and thus remove each L-shaped angle plate and T-shaped support plate.

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

[0027] The support device is a prefabricated structure. When it is installed in the underground space protective closed door to support the door frame, no welding or open flame operations are required. There is no safety hazard and no harm to the workers' health. Ordinary workers can carry out the disassembly and assembly of the support device. Four L-shaped angle plates and two T-shaped support plates are installed on the inner side of the door frame. Four vertical support rods are used to form vertical supports on the inner side of the door frame to prevent the door frame from being squeezed and deformed by vertical pressure. Four horizontal support rods are used to form lateral supports on the inner side of the door frame to prevent the door frame from being squeezed and deformed by lateral pressure. Four oblique support rods are used to form oblique supports on the front and back sides of the door frame to prevent the door frame from falling over. The support device is easy to disassemble and assemble, can be quickly disassembled and assembled, and saves door frame support operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the supporting device of the present invention;

[0030] Figure 2 It is a schematic diagram of the partial structure explosion of the supporting device of the present invention;

[0031] Figure 3 for Figure 2 A is an enlarged schematic diagram of the local structure at center A;

[0032] Figure 4 for Figure 2 A magnified schematic diagram of the local structure at B in the middle;

[0033] Figure 5 It is a schematic structural diagram of the support device of the present invention in use state.

[0034] The names of the components in the figure are: 1. L-shaped angle plate; 2. T-shaped support plate; 3. Vertical support rod; 3.1. First rod; 3.2. First handle; 3.3. First screw; 3.4. U-shaped pressure plate; 3.5. Limit slide plate; 4. Horizontal support rod; 4.1. Second rod; 4.2. Second handle; 4.3. Second screw; 5. Oblique support rod; 5.1. Third rod; 5.2. Third handle; 5.3. Third screw; 6. Rib plate; 7. T-shaped limit block; 8. Bolt and nut assembly; 9. Articulated base; 10. U-shaped articulated seat; 11. Limit flange; 12. Positioning plate; 13. Door frame. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0036] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "front", "back", "left", "right", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Example 1

[0038] A supporting device for installing an underground space protective closed door, such as Figure 1 and Figure 5 As shown, the protective closed door includes a door frame 13, and the support device is used to support the door frame 13 when the door frame 13 is installed. The support device is mainly composed of an L-shaped angle plate 1, a T-shaped support plate 2, a vertical support rod 3, a horizontal support rod 4, an oblique support rod 5 and a hinged base 9;

[0039] There are eight L-shaped angle plates 1; four of the L-shaped angle plates 1 are used to be installed at the four corners of the inner side of the door frame 13 and are distributed in a rectangular shape, and the two outer side walls of the L-shaped angle plates 1 are both in contact with the inner side walls of the door frame 13; the other four L-shaped angle plates 1 are welded in pairs to form a T-shaped support plate 2, and the two T-shaped support plates 2 are used to be installed on the inner side of the door frame 13 and are distributed symmetrically up and down, and the T-shaped support plate 2 is located between the left and right L-shaped angle plates 1;

[0040] A vertical support rod 3 is provided between two L-shaped angle plates 1 facing each other in the eight L-shaped angle plates 1, and both ends of the vertical support rod 3 are detachably connected to the L-shaped angle plates 1. When the door frame 13 is installed, the four vertical support rods 3 can vertically stabilize the eight L-shaped angle plates 1 and form a vertical support on the inner side of the door frame 13 to prevent the door frame 13 from being squeezed and deformed by the vertical pressure.

[0041] A horizontal support rod 4 is provided between each T-shaped support plate 2 and its left L-shaped angle plate 1 and its right L-shaped angle plate 1. Both ends of the horizontal support rod 4 are detachably connected to the L-shaped angle plate 1. When the door frame 13 is installed, the four horizontal support rods 4 can stabilize the eight L-shaped angle plates 1 laterally and form a lateral support on the inner side of the door frame 13 to prevent the door frame 13 from being squeezed and deformed by the lateral pressure.

[0042] There are four oblique support rods 5 and four hinged bases 9, and the four hinged bases 9 are respectively installed at the bottom ends of the four oblique support rods 5; the top ends of two of the oblique support rods 5 are detachably connected to the L-shaped angle plate 1 at the left top corner, and the two oblique support rods 5 are opposite to each other front and back; the top ends of the other two oblique support rods 5 are detachably connected to the L-shaped angle plate 1 at the right top corner, and the two oblique support rods 5 are opposite to each other front and back; when installing the door frame 13, the four hinged bases 9 can be anchored to the ground or embedded in the ground with anchor nails, and the four oblique support rods 5 can form oblique supports on the front and back sides of the door frame 13 to prevent the door frame 13 from falling over.

[0043] In this embodiment, Figure 1 to Figure 2 As shown, the vertical support rod 3, the horizontal support rod 4 and the diagonal support rod 5 are all telescopic rod structures; by adjusting the length of the vertical support rod 3 and the horizontal support rod 4, the L-shaped angle plate 1 can be easily installed, and each L-shaped angle plate 1 can be pressed and fixed to the inner wall of the door frame 13 along the vertical and horizontal directions, and can provide vertical and horizontal supporting force; by adjusting the length of the diagonal support rod 5, the diagonal support rod 5 can be easily installed between the L-shaped angle plate 1 and the hinged base 9, and form diagonal support on the front and rear sides of the door frame 13.

[0044] In this embodiment, Figure 1 to Figure 2 As shown, the vertical support rod 3 includes two first rods 3.1 and a first rotating handle 3.2; both ends of the first rotating handle 3.2 are integrally formed with a first screw rod 3.3, and the external threads on the two first screw rods 3.3 are screwed in opposite directions, and one end of the two first rods 3.1 is respectively threadedly connected to the two first screw rods 3.3, and the length of the first screw rod 3.3 screwed into the first rod 3.1 can be adjusted by rotating the first rotating handle 3.2 forward or reversely, thereby adjusting the overall length of the vertical support rod 3 Specifically, when the first turning handle 3.2 is rotated, the two first screws 3.3 are synchronously screwed out of or screwed into the first rod 3.1; the other ends of the two first rods 3.1 are fixedly provided with U-shaped pressing plates 3.4; when supporting the door frame 13, the top U-shaped pressing plate 3.4 presses against the L-shaped angle plate 1 at its top, and the bottom U-shaped pressing plate 3.4 presses against the L-shaped angle plate 1 at its bottom, and the length of the vertical support rod 3 is adjusted to press the two L-shaped angle plates 1 in the vertical direction.

[0045] In this embodiment, Figures 1 to 4As shown, a T-shaped limit block 7 extending in the left-right direction is welded to the inner side wall of the top plate or the inner side wall of the bottom plate of each L-shaped angle plate 1, and two slide grooves distributed front and back are formed between the T-shaped limit block 7 and the L-shaped angle plate 1. A limit slide plate 3.5 is fixedly provided at the front and rear ends of the opening of each U-shaped pressure plate 3.4, and the two limit slide plates 3.5 are respectively slidably matched with the two slide grooves; when the vertical support rod 3 is installed so that it presses against the upper and lower L-shaped angle plates 1 in the vertical direction to support the door frame 13, the overall length of the vertical support rod 3 is contracted so that the two U-shaped pressure plates 3.4 at the upper and lower ends can be separated Don't align the T-shaped limit blocks 7 on the upper and lower L-shaped angle plates 1, and the limit sliding plate 3.5 can be inserted into the slide groove from the left and right directions, and the T-shaped limit block 7 can be inserted into the U-shaped pressure plate 3.4 from the left and right directions. The T-shaped limit block 7 can be used to limit the vertical support rod 3 to prevent the U-shaped pressure plate 3.4 of the vertical support rod 3 from detaching from the L-shaped angle plate 1 along the front and rear directions, and then adjust the overall length of the vertical support rod 3 so that the top and bottom ends of the vertical support rod 3 are respectively pressed against the upper and lower L-shaped angle plates 1, thereby fixing the upper and lower L-shaped angle plates 1 and the vertical support rod 3 and forming a vertical support.

[0046] In this embodiment, Figures 1 to 4 As shown, each of the T-shaped limit blocks 7 is integrally formed with a positioning plate 12 at the inner end, and the positioning plate 12 can be used for positioning; when installing the vertical support rod 3, the limiting slide plate 3.5 of the vertical support rod 3 is inserted into the slide groove until the limiting slide plate 3.5 is against the positioning plate 12, indicating that the vertical support rod 3 is pushed into place along the left and right directions, so that the vertical support rod 3 is located in the middle position of the top plate or the bottom plate of the L-shaped angle plate 1, and the installation position of the vertical support rod 3 on the L-shaped angle plate 1 is positioned.

[0047] In this embodiment, Figures 1 to 4As shown, the inner side wall of each L-shaped angle plate 1 is welded with two ribs 6 spaced apart from each other, and a bolt and nut assembly 8 is installed between the two ribs 6; the horizontal support rod 4 includes two second rods 4.1 and a second turning handle 4.2; both ends of the second turning handle 4.2 are integrally formed with second screws 4.3, and the external threads on the two second screws 4.3 are rotated in opposite directions, and one end of the two second rods 4.1 is threadedly connected to the two second screws 4.3 respectively, and the length of the second screw 4.3 screwed into the second rod 4.1 can be adjusted by rotating the second turning handle 4.2 forward or reversely, thereby adjusting the overall length of the horizontal support rod 4, specifically, when the second turning handle 4.2 is rotated The two second screw rods 4.3 are synchronously screwed out of or screwed into the second rod member 4.1; the other ends of the two second rod members 4.1 are respectively mounted on the two left and right bolts; when the horizontal support rod 4 is installed between the T-shaped support plate 2 and the L-shaped angle plate 1 at the end corner of the door frame 13, the left and right ends of the horizontal support rod 4 are correspondingly extended into between the two ribs 6 on the inner side of the L-shaped angle plate 1, and the bolts installed between the two ribs 6 pass through the jacks opened at the ends of the horizontal support rod 4, thereby connecting the ends of the horizontal support rod 4 to the L-shaped angle plate 1, and lengthening the overall length of the horizontal support rod 4, so that it can press against the L-shaped angle plate 1 and the T-shaped support plate 2 in the left and right directions to form a lateral support.

[0048] In this embodiment, Figure 1 to Figure 2 As shown, the front and rear sides of the L-shaped angle plate 1 at the left top corner and the front and rear sides of the L-shaped angle plate 1 at the right top corner are provided with U-shaped hinge seats 10, and the two U-shaped hinge seats 10 are fixed to the two ribs 6 on the L-shaped angle plate 1 by bolt and nut assemblies 8; the oblique support rod 5 includes two third rods 5.1 and a third rotating handle 5.2; both ends of the third rotating handle 5.2 are integrally formed with third screw rods 5.3, and the external threads on the two third screw rods 5.3 are rotated in opposite directions, one end of the two third rods 5.1 is threadedly connected with the two third screw rods 5.3 respectively, and the length of the third screw rod 5.3 screwed into the third rod 5.1 can be adjusted by rotating the third rotating handle 5.2 forward or reversely, thereby adjusting the overall length of the oblique support rod 5. Specifically, when the third turning handle 5.2 is rotated, the two third screws 5.3 are synchronously screwed out of or into the third rod 5.1; the other ends of the two third rods 5.1 are respectively hinged to the hinge base 9 and the U-shaped hinge base 10 through the bolt and nut assembly 8; when the door frame 13 is obliquely supported to prevent lodging, after each L-shaped angle plate 1 and the T-shaped support plate 2 are fixed on the inner side of the door frame 13 to form vertical support and horizontal support, two front and rear opposite oblique support rods 5 are installed on the left and right sides of the door frame 13, and the top and bottom ends of the oblique support rods 5 are respectively hinged to the U-shaped hinge base 10 and the hinge base 9 through the bolt and nut assembly 8, and the overall length of the oblique support rods 5 is adjusted to perform oblique support.

[0049] In this embodiment, Figures 1 to 5As shown, the outer side wall of each L-shaped angle plate 1 is welded with two limiting flanges 11 spaced apart from each other in the front and rear directions. When the outer side wall of the L-shaped angle plate 1 abuts against the inner side wall of the door frame 13, the two limiting flanges 11 spaced apart from each other in the front and rear directions can clamp the door frame 13 from the front and rear sides, thereby preventing the L-shaped angle plate 1 from detaching from the door frame 13 in the front and rear directions.

[0050] In this embodiment, the L-shaped angle plate 1 and its accessories and the hinged base 9 are all made of high-strength steel, the vertical support rod 3, the horizontal support rod 4 and the diagonal support rod 5 are all made of high-strength steel pipes, the handle and the screw are all made of high-strength steel rods, and the bolt and nut assembly 8 is made of high-strength steel.

[0051] Example 2

[0052] A supporting device for installing an underground space protective closed door, the supporting device is used to support the installation method of the door frame 13 as follows:

[0053] Step 1: Install four L-shaped angle plates 1 at the four corners of the inner side of the door frame 13, install a vertical support rod 3 between the upper and lower L-shaped angle plates 1 for vertical support, install two T-shaped support plates 2 facing each other up and down at the middle position of the inner side of the door frame 13, and install two vertical support rods 3 between the two T-shaped support plates 2 for vertical support; specifically, when installing the vertical support rods 3, adjust the length of the vertical support rods 3 so that the limiting slide plates 3.5 at the upper and lower ends of the vertical support rods 3 can be inserted into the sliding grooves on the L-shaped angle plates 1. After the vertical support rods 3 are moved into place, rotate the first turning handle 3.2 to lengthen the vertical support rods 3, so as to support and fix the upper and lower L-shaped angle plates 1 to the inner wall of the door frame 13;

[0054] Step 2: Install the horizontal support rod 4 between the T-shaped support plate 2 and the left and right L-shaped angle plates 1 for lateral support; specifically, when installing the horizontal support rod 4, the left and right ends of the horizontal support rod 4 pass through the U-shaped pressing plates 3.4 on the left and right sides respectively, adjust the length of the U-shaped pressing plates 3.4, install bolts between the two ribs 6, make the bolts pass through the jacks at the ends of the horizontal support rod 4, rotate the second turning handle 4.2 to lengthen the horizontal support rod 4, so as to form lateral support, and fix the L-shaped angle plate 1 to the inner wall of the door frame 13 in the lateral direction;

[0055] Step 3: Install four oblique support rods 5 for oblique support; specifically, when installing the oblique support rods 5, the top end of the oblique support rods 5 is hinged to the U-shaped hinge seat 10 installed on the L-shaped angle plate 1 through the bolt and nut assembly 8, and the bottom end of the oblique support rods 5 is hinged to the hinge base 9 through the bolt and nut assembly 8. The length of the oblique support rods 5 is adjusted to determine the inclination angle of the oblique support rods 5 and the anchoring position of the hinge base 9 on the ground, and the hinge base 9 is anchored to the ground through anchor nails;

[0056] Step 4: respectively twist the first rotating handle 3.2, the second rotating handle 4.2 and the third rotating handle 5.2 to pre-tighten the telescopic rod, so as to form a stable vertical support, a horizontal support and a diagonal support for the door frame 13.

[0057] The method for removing the support device is as follows:

[0058] Step 1: Remove the bolt and nut assembly 8 between the top of the oblique support rod 5 and the U-shaped hinge seat 10 to remove each oblique support rod 5 and remove the hinge base 9 from the ground; specifically, first turn the third handle 5.2 to eliminate the pre-tightening force of the oblique support rod 5 in the oblique direction, so as to facilitate the removal of the bolt at the top of the oblique support rod 5;

[0059] Step 2: disassemble each horizontal support rod 4 to eliminate the lateral support; specifically, firstly turn the second turning handle 4.2 to eliminate the lateral pre-tightening force of the horizontal support rod 4, so as to facilitate pulling out the bolts at both ends of the horizontal support rod 4, thereby disassembling the horizontal support rod 4;

[0060] Step three, turn each first turning handle 3.2 to shorten the vertical support rod 3, eliminate the vertical support, and thus remove each L-shaped angle plate 1 and T-shaped support plate 2; specifically, after turning the first turning handle 3.2 to shorten the vertical support rod 3, the pre-tightening of the vertical support rod 3 on the upper and lower L-shaped angle plates 1 is eliminated, so that the upper L-shaped angle plate 1 is disengaged from the door frame 13, so that it can be removed from the door frame 13.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A supporting device for installing an underground space protective closed door, characterized in that: The support device comprises eight L-shaped angle plates (1); four of the L-shaped angle plates (1) are used to be installed at four corners of the inner side of the door frame (13) and are distributed in a rectangular shape; the other four L-shaped angle plates (1) are welded in pairs to form T-shaped support plates (2), and the two T-shaped support plates (2) are used to be installed on the inner side of the door frame (13) and are distributed symmetrically up and down; A vertical support rod (3) is provided between two L-shaped angle plates (1) that are opposite to each other in the eight L-shaped angle plates (1), and both ends of the vertical support rod (3) are detachably connected to the L-shaped angle plates (1); A horizontal support rod (4) is provided between each T-shaped support plate (2) and its left L-shaped angle plate (1) and its right L-shaped angle plate (1), and both ends of the horizontal support rod (4) are detachably connected to the L-shaped angle plate (1); The support device further comprises four oblique support rods (5) and four hinged bases (9), wherein the four hinged bases (9) are respectively mounted on the bottom ends of the four oblique support rods (5); wherein the top ends of two oblique support rods (5) are detachably connected to the L-shaped angle plate (1) at the left top corner, and the two oblique support rods (5) are opposite to each other front and back; and the top ends of the other two oblique support rods (5) are detachably connected to the L-shaped angle plate (1) at the right top corner, and the two oblique support rods (5) are opposite to each other front and back.

2. The supporting device for installing an underground space protective airtight door according to claim 1, characterized in that: The vertical support rod (3), the horizontal support rod (4) and the oblique support rod (5) are all telescopic rod structures.

3. The supporting device for installing an underground space protective airtight door according to claim 2, characterized in that: The vertical support rod (3) comprises two first rod members (3.1) and a first rotating handle (3.2); first screw rods (3.3) are fixedly arranged at both ends of the first rotating handle (3.2), and the external threads on the two first screw rods (3.3) are screwed in opposite directions; one end of the two first rod members (3.1) is respectively threadedly connected to the two first screw rods (3.3); and a U-shaped pressing plate (3.4) is fixedly arranged at the other ends of the two first rod members (3.1).

4. The supporting device for installing an underground space protective airtight door according to claim 3, characterized in that: A T-shaped limit block (7) extending in the left-right direction is welded to the inner side wall of the top plate or the inner side wall of the bottom plate of each L-shaped angle plate (1), and two slide grooves distributed front and back are formed between the T-shaped limit block (7) and the L-shaped angle plate (1). A limit slide plate (3.5) is fixedly provided at both the front and rear ends of the opening of each U-shaped pressure plate (3.4), and the two limit slide plates (3.5) are respectively slidably matched with the two slide grooves.

5. The supporting device for installing an underground space protective airtight door according to claim 4, characterized in that: A positioning plate (12) is fixedly arranged on the inner end of each T-shaped limit block (7).

6. The supporting device for installing an underground space protective airtight door according to claim 4, characterized in that: The inner side wall of each L-shaped angle plate (1) is welded with two ribs (6) spaced apart from each other, and a bolt and nut assembly (8) is installed between the two ribs (6); the horizontal support rod (4) comprises two second rods (4.1) and a second rotating handle (4.2); second screw rods (4.3) are fixedly arranged at both ends of the second rotating handle (4.2), and the external threads on the two second screw rods (4.3) are rotated in opposite directions, and one end of the two second rods (4.1) is respectively threadedly connected to the two second screw rods (4.3); and the other ends of the two second rods (4.1) are respectively sleeved on the two left and right bolts.

7. The supporting device for installing an underground space protective airtight door according to claim 6, characterized in that: U-shaped hinged seats (10) are provided on both the front and rear sides of the L-shaped angle plate (1) at the left top corner and the front and rear sides of the L-shaped angle plate (1) at the right top corner, and the two U-shaped hinged seats (10) are fixed to the two ribs (6) on the L-shaped angle plate (1) through bolt and nut assemblies (8); the oblique support rod (5) comprises two third rods (5.1) and a third rotating handle (5.2); third screw rods (5.3) are fixedly provided at both ends of the third rotating handle (5.2), and the external threads on the two third screw rods (5.3) are rotated in opposite directions, and one end of the two third rods (5.1) is respectively threadedly connected to the two third screw rods (5.3); the other ends of the two third rods (5.1) are respectively hinged to the hinged base (9) and the U-shaped hinged seat (10) through the bolt and nut assemblies (8).

8. The supporting device for installing an underground space protective airtight door according to claim 7, characterized in that: The outer side wall of each L-shaped angle plate (1) is fixedly provided with two limiting flanges (11) spaced apart from each other in the front and rear directions.

9. The supporting device for installing an underground space protective airtight door according to claim 7, characterized in that: The installation method of the support device for supporting the door frame (13) is as follows: Step 1: four L-shaped angle plates (1) are installed at the four corners of the inner side of the door frame (13), a vertical support rod (3) is installed between the upper and lower L-shaped angle plates (1) for vertical support, two T-shaped support plates (2) are installed in the middle position of the inner side of the door frame (13) in an upper and lower direction, and two vertical support rods (3) are installed between the two T-shaped support plates (2) for vertical support; Step 2: Install a horizontal support rod (4) between the T-shaped support plate (2) and the left and right L-shaped angle plates (1) for lateral support; Step 3, installing four oblique support rods (5) for oblique support; Step 4: respectively twist the first rotating handle (3.2), the second rotating handle (4.2) and the third rotating handle (5.2) to pre-tighten the telescopic rod, so as to form a stable vertical support, a horizontal support and an oblique support for the door frame (13).

10. The supporting device for installing an underground space protective closed door according to claim 9, characterized in that: The method for removing the support device is as follows: Step 1: dismantle the bolt and nut assembly (8) between the top of the oblique support rod (5) and the U-shaped hinge seat (10) to remove each oblique support rod (5) and remove the hinge seat (9) from the ground; Step 2: dismantle each horizontal support rod (4) to eliminate the lateral support; Step three, twisting each first turning handle (3.2) to shorten the vertical support rod (3), eliminating the vertical support, and thus removing each L-shaped angle plate (1) and T-shaped support plate (2).

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