Brick chimney outer wall spiral ladder mounting structure and construction method

Abstract

The invention discloses a brick chimney outer wall spiral spiral ladder mounting structure and a construction method.The spiral spiral ladder mounting structure comprises a chimney outer wall and a spiral spiral ladder, a vertical steel belt and a transverse steel belt which are distributed in a latticed mode are arranged outside the chimney outer wall, inclined steel belts are arranged outside the vertical steel belt and the transverse steel belt, and the vertical steel belt and the transverse steel belt are connected with the spiral spiral ladder. A spiral spiral ladder is arranged outside the inclined steel belt, handrails are arranged on the outer side of the spiral spiral ladder, and steel supports are obliquely distributed at the bottom of the spiral spiral ladder. The latticed steel belt is mounted outside the brick chimney, so that the integrity, shock resistance and bearing capacity of an original wall are improved, and the chimney is firmer; meanwhile, the spiral ladder and the net-shaped steel belt are directly welded together and are matched with the steel support for use, so that the stability and the firmness of the spiral ladder are ensured, the construction difficulty is reduced, the working efficiency is improved, the use is convenient, and the operation is simple.

Description

Technical Field

[0001] The invention relates to a spiral ladder installation method, in particular to a spiral ladder installation structure and a construction method for an outer wall of a brick chimney, belonging to the technical field of building construction. Background Art

[0002] In recent years, with the gradual improvement of social environmental protection awareness, whether chimney emissions meet environmental protection requirements has received more and more attention. In order to monitor whether the chimney emissions meet the standards, monitoring personnel need to carry detection instruments with them to climb to the monitoring point to collect data. The newly added monitoring point is neither on the platform at the top of the chimney nor near the ladder, making the detection difficult or even impossible to operate, which not only affects the accuracy of the test data, but also greatly increases the danger faced by the test personnel. Therefore, adding a spiral staircase on the outside of the brick chimney is a good solution. The stairs can be flexibly set according to the height of the measuring point in the middle of the chimney, increase or decrease the number of steps, so that the test personnel are at the most suitable detection height. Because the ladder is abandoned and replaced by stairs, the test personnel can easily carry sophisticated testing instruments to the detection point, thereby avoiding possible collisions of the testing equipment during transportation. The most important thing is to provide enough standing space for the test personnel, so that the personnel can operate with ease, which greatly improves the safety of the test personnel working at high altitudes.

[0003] When installing a spiral ladder outside the chimney, connectors will be installed on the outer wall of the chimney. To ensure that the connectors can be firmly installed on the outer wall of the chimney, expansion bolts will be installed on the outer wall of the chimney in advance. After the connectors are installed, the assembled spiral ladder frame will be installed section by section from the bottom, and each component will be fixedly connected to the connectors by bolts. However, for a brick chimney, installing too many expansion bolts and embedded parts on the outside of the chimney as bearing points for the spiral ladder will not only damage the brick chimney body, but also reduce the safety and firmness of the spiral ladder. At the same time, the spiral ladder is directly installed on the connector. If there is an error in the installation position of the connector, the spiral ladder cannot be installed smoothly. Therefore, the installation of the connector is also the focus and difficulty of the construction. During construction, the staff will spend a lot of time to determine the position of the connector, which will increase the construction period. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a spiral ladder installation structure and a construction method for the outer wall of a brick chimney, by installing a grid-like steel belt on the outside of the brick chimney, the integrity, earthquake resistance and bearing capacity of the original wall are improved, and the chimney is made more solid; at the same time, the spiral ladder is directly welded to the mesh steel belt, and the use of steel supports is combined to ensure the stability and firmness of the spiral ladder, reduce the construction difficulty, improve work efficiency, and is easy to use and simple to operate.

[0005] The technical solution adopted by the present invention to solve the technical problem is: A spiral staircase installation structure for a brick chimney outer wall comprises a chimney outer wall and a spiral staircase, wherein the chimney outer wall is provided with vertical steel belts and transverse steel belts, the vertical steel belts and transverse steel belts are distributed on the surface of the chimney in a grid shape, and oblique steel belts are provided on the outside of the vertical and transverse steel belts, a spiral staircase is provided on the outside of the oblique steel belts, a railing is provided on the outside of the spiral staircase, and steel supports are obliquely distributed at the bottom of the spiral staircase.

[0006] The vertical steel belt and the transverse steel belt are both made of flat steel. The vertical steel belt is connected to the chimney outer wall by bolts. The transverse steel belt is located outside the vertical steel belt. Support plates are respectively provided at both ends of the transverse steel belt, and tension bolts are provided between the support plates to make the transverse steel belt closely contact with the chimney outer wall. The spiral staircase is composed of a plurality of steel pedals, the upper ends of the steel supports are connected to the bottoms of the steel pedals, and the lower ends of the steel supports are connected to the vertical steel belts.

[0007] The construction method of the spiral staircase installation structure of the brick chimney outer wall comprises the following steps: S1. The chimney is stopped from use and cooled down; S2. Install a special hanging basket, clean the attachments on the chimney surface, and lay out the vertical and horizontal steel strips. The spacing between adjacent vertical steel strips and the spacing between adjacent horizontal steel strips are both 1m. S3. Prefabricate transverse steel strips according to the outer diameter of the brick chimney, weld support plates at both ends of the transverse steel strips, and open bolt holes on the support plates; S4, first install the vertical steel belts, then install the transverse steel belts, wherein: the vertical steel belts are welded together in an overlapping manner and fixedly connected to the chimney outer wall by bolts; when installing the transverse steel plate, bolts are installed between adjacent support plates, and the transverse steel plate is fastened to the outside of the brick chimney by tightening the bolts, and then the intersection of the vertical steel belt and the transverse steel belt is welded and fixed; S5. Position and lay out, and mark the installation position of the oblique steel belt on the outside of the vertical steel belt and the horizontal steel belt, and process and install the oblique steel belt so that the oblique steel belt is welded with the vertical steel belt and the horizontal steel belt; S6. Use a steel plate positioner to make a steel step, wherein: the steel plate positioner includes a first positioning plate, a second positioning plate, a first crowbar and a second crowbar, a limit plate is arranged at the bottom of the left end of the first positioning plate, a U-shaped frame is connected to the middle of the first positioning plate by bolts, a plug hole is dug at the right end of the first positioning plate, and a first crowbar is arranged in the plug hole; there are two second positioning plates, each of which has a card slot at the bottom of the outer end thereof, and a second crowbar is rotatably connected between the two second positioning plates; when in use, the first positioning plate is installed at the upper right side of the steel step, and the first positioning plate is clamped and fixed to the step side plate by the first crowbar; the second positioning plate is installed on the left side of the steel step, and the second crowbar and the U-shaped frame are used to adjust the inclination angle of the steel step to assist the staff in welding and fixing the steel step and the step side plate; S7. After the steel steps are prefabricated, they are installed by means of segmented hoisting. After each segment of the steel steps is firmly welded to the oblique steel belt, a steel support is installed at the bottom of the steel steps. S8. After the steel steps are installed, the handrails are installed. After the construction is completed, the surface of the steel structure is treated with anti-corrosion and rust removal.

[0008] The size of the slot matches that of the step side plate, and matching tightening bolts are arranged on the outer wall of the slot.

[0009] A matching insertion hole is dug at the top of the U-shaped frame at a position corresponding to the first positioning plate, and a guide cylinder is arranged above the insertion hole, and a tightening bolt is arranged outside the guide cylinder.

[0010] The position of the clamping slot corresponds to the position of the step side plate.

[0011] The positive beneficial effects of the present invention are: 1. The present invention improves the integrity, earthquake resistance and bearing capacity of the original wall by installing grid-shaped horizontal and vertical steel strips on the outside of the brick chimney, making the chimney more solid. At the same time, the installation of spiral ladder embedded parts on the outside of the chimney is reduced to avoid damage to the outside of the brick chimney caused by the embedded parts.

[0012] 2. The present invention welds oblique steel belts to the outside of the transverse steel belts and the vertical steel belts, and directly welds the prefabricated spiral ladder to the oblique steel belts. Workers only need to weld the oblique steel belts to the outside of the mesh steel belts according to the positions of the steel steps, which reduces the construction difficulty. By arranging steel supports between the bottom of the spiral ladder and the mesh steel belts, the stability and safety of the spiral ladder are improved.

[0013] 3. The present invention provides a steel plate positioner, which enables the staff to adjust and fix the inclination angle of the steel pedal, which is beneficial to the welding construction of the steel pedal and the pedal side plate, improves the work efficiency, is convenient to use and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 Sectional view of AA in the middle; Figure 3 This is the connection structure diagram of the transverse steel belt; Figure 4 It is a structural schematic diagram of the steel plate positioner of the present invention; Figure 5 is a schematic structural diagram of a second positioning plate of the present invention; Among them: 1- chimney outer wall, 2- vertical steel belt, 3- horizontal steel belt, 4- support plate, 5- bolt, 6- oblique steel belt, 7- steel step, 8- steel support, 9- railing, 10- step side plate, 11- first positioning plate, 12- limit plate, 13- socket, 14- first crowbar, 15- guide cylinder, 16- U-shaped frame, 17- second positioning plate, 18- slot, 19- second crowbar. DETAILED DESCRIPTION

[0015] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings: Example 1, see Figure 1-Figure 3 A spiral staircase installation structure for a brick chimney outer wall comprises a chimney outer wall 1 and a spiral staircase, a vertical steel belt 2 and a horizontal steel belt 3 are arranged on the outside of the chimney outer wall 1, the vertical steel belt 2 and the horizontal steel belt 3 are distributed on the surface of the chimney in a grid shape, and an oblique steel belt 6 is arranged on the outside of the vertical steel belt 2 and the horizontal steel belt 3, a spiral staircase is arranged on the outside of the oblique steel belt 6, a railing 9 is arranged on the outside of the spiral staircase, and a steel support 8 is obliquely distributed at the bottom of the spiral staircase.

[0016] The vertical steel belt 2 and the transverse steel belt 3 are both made of flat steel. The vertical steel belt 2 is connected to the chimney outer wall 1 by bolts. The transverse steel belt 3 is located outside the vertical steel belt 2. Support plates 4 are respectively provided at both ends of the transverse steel belt 3, and tensioning bolts 5 are provided between the support plates 4 to make the transverse steel belt 3 in close contact with the chimney outer wall 1.

[0017] The spiral staircase is composed of a plurality of steel pedals 7, with step side plates 10 provided on both sides of the steel pedals, connected to the bottom of the steel pedals 7 at the upper end of the steel support 8, and connected to the vertical steel belt 2 at the lower end of the steel support 8.

[0018] In the above description, the vertical and transverse steel strips are evenly arranged at intervals of 1 meter along the entire chimney surface to form a grid, and prestress is applied to the transverse steel strips to make the steel strips close to the surface of the brick wall, thereby effectively restraining the chimney brick wall which is small at the top and large at the bottom under the action of its own weight.

[0019] In the above description, the railing uses angle steel as the vertical rod, the top is welded with angle steel as the handrail, the bottom is directly welded to the step, and steel strips are set at a spacing of 300mm in the middle to form the railing.

[0020] In the above description, the steel support is arranged obliquely under the step using angle steel, one end is connected to the cantilevered end of the step, and the other end is connected to the mesh-arranged steel belt to form an oblique support to improve the stability of the stairs.

[0021] Example 2, see Figure 4-Figure 5 A construction method for a spiral staircase installation structure of a brick chimney outer wall comprises the following steps: S1. The chimney is stopped from use and cooled down; S2. Install a special hanging basket, clean the attachments on the chimney surface, and lay out the lines to locate the positions of the vertical steel strips 2 and the horizontal steel strips 3, where the spacing between adjacent vertical steel strips 2 and the spacing between adjacent horizontal steel strips 3 are both 1m; S3, prefabricate a transverse steel strip 3 according to the outer diameter of the brick chimney, weld support plates 4 at both ends of the transverse steel strip 3, and open bolt holes on the support plates 4; S4, first install the vertical steel strip 2, and then install the transverse steel strip 3, wherein: the vertical steel strip 2 is welded together in an overlapping manner, and is fixedly connected to the chimney outer wall 1 by bolts; when installing the transverse steel plate 3, bolts 5 are installed between adjacent support plates 4, and the transverse steel plate 3 is fastened to the outside of the brick chimney by tightening the bolts 5, and then the intersection of the vertical steel strip 2 and the transverse steel strip 3 is welded and fixed; S5, positioning and laying out, marking the installation position of the oblique steel belt 6 on the outside of the vertical steel belt 2 and the transverse steel belt 3, and processing and installing the oblique steel belt 6, so that the oblique steel belt 6 is welded with the vertical steel belt 2 and the transverse steel belt 3; S6. Use a steel plate positioner to make a steel step, wherein: the steel plate positioner includes a first positioning plate 11, a second positioning plate 17, a first crowbar 14 and a second crowbar 19. A limit plate 12 is arranged at the bottom of the left end of the first positioning plate 11, a U-shaped frame 16 is connected to the middle of the first positioning plate 11 by bolts, a plug hole 13 is dug at the right end of the first positioning plate 11, and a first crowbar is arranged in the plug hole 13; there are two second positioning plates 17, each of which has a card slot 18 at the bottom of the outer end, and a second crowbar 19 is rotatably connected between the two second positioning plates 17; when in use, the first positioning plate 11 is installed at the upper right side of the steel step 7, and the first positioning plate 11 is clamped and fixed to the step side plate by the first crowbar 14; the second positioning plate 17 is installed on the left side of the steel step 7, and the second crowbar 19 and the U-shaped frame 16 are used to adjust the inclination angle of the steel step 7 to assist the staff in welding and fixing the steel step 7 and the step side plate; S7, after the prefabrication of the steel step 7 is completed, the steel step 7 is installed by means of segmented hoisting, and after each segment of the steel step 7 is firmly welded to the oblique steel belt 6, a steel support 8 is installed at the bottom of the steel step 7; S8. After the steel steps 7 are installed, the handrails 9 are installed. After the construction is completed, the surface of the steel structure is treated with anti-corrosion and rust removal.

[0022] The size of the slot 18 matches the size of the step side plate, and matching tightening bolts are arranged on the outer wall of the slot 18 .

[0023] A matching insertion hole is dug at a position on the top of the U-shaped frame 16 corresponding to the first positioning plate 11 , and a guide cylinder 15 is arranged above the insertion hole, and a tightening bolt is arranged outside the guide cylinder 15 .

[0024] The position of the clamping groove 18 corresponds to the position of the step side plate.

[0025] In the above description, the steel treads are made of patterned steel plates. As the stairs go up, the patterned steel plates decrease in width by 10 mm every 20 pieces.

[0026] In the above description, the number of transverse steel strips on each horizontal plane can be 1, 2 or 3... Since the outer diameter of the brick chimney decreases from bottom to top, the number of transverse steel strips on each horizontal plane needs to be determined according to the outer diameter of the brick chimney; the support plates at the ends of adjacent transverse steel strips are connected together by bolts and tightened and fixed.

[0027] In the above description, when using the steel plate positioner, the limit plate on the left side of the first positioning plate is clamped on the outside of one side step side plate, the socket is located on the outside of the other side step side plate, and the first crowbar is inserted into the socket, and the first crowbar is used to fix the first positioning plate and the two step side plates together.

[0028] In the above description, the coordinated use of the U-shaped frame and the second crowbar can quickly adjust the steel pedal to the installation angle, making it easier for workers to perform welding construction on the steel pedal.

[0029] The present invention improves the integrity, earthquake resistance and bearing capacity of the original wall by installing a grid-like steel belt on the outside of the brick chimney, making the chimney more solid; at the same time, the spiral ladder is directly welded to the mesh-like steel belt and used with steel supports, thereby ensuring the stability and firmness of the spiral ladder, reducing the construction difficulty, improving work efficiency, and being easy to use and simple to operate.

Claims

1. A spiral staircase installation structure for a brick chimney outer wall, comprising a chimney outer wall (1) and a spiral staircase, characterized in that: The chimney outer wall (1) is provided with vertical steel strips (2) and transverse steel strips (3), and the vertical steel strips (2) and transverse steel strips (3) are distributed on the surface of the chimney in a grid-like manner, and oblique steel strips (6) are provided on the outside of the vertical steel strips (2) and transverse steel strips (3), and a spiral staircase is provided on the outside of the oblique steel strips (6), and a railing (9) is provided on the outside of the spiral staircase, and a steel support (8) is obliquely distributed at the bottom of the spiral staircase.

2. The spiral staircase installation structure for the outer wall of a brick chimney according to claim 1, characterized in that: The vertical steel strip (2) and the transverse steel strip (3) are both made of flat steel. The vertical steel strip (2) is connected to the chimney outer wall (1) by bolts (5). The transverse steel strip (3) is located outside the vertical steel strip (2). Support plates (4) are respectively provided at both ends of the transverse steel strip (3). Bolts (5) are provided between the support plates (4). The transverse steel strip (3) is brought into close contact with the chimney outer wall (1) by tightening the bolts.

3. The spiral staircase installation structure for the outer wall of a brick chimney according to claim 1, characterized in that: The spiral staircase is composed of a plurality of steel pedals (7), and step side plates (10) are provided on both sides of the steel pedals (7). The upper end of the steel support (8) is connected to the bottom of the steel pedal (7), and the lower end of the steel support (8) is connected to the vertical steel belt (2).

4. The construction method of a spiral staircase installation structure for a brick chimney outer wall according to claim 1, characterized in that: The steps include: S1. The chimney is stopped from use and cooled down; S2. Install a special hanging basket, clean the attachments on the chimney surface, and lay out the vertical steel strips (2) and the horizontal steel strips (3) to locate their positions, wherein the spacing between adjacent vertical steel strips (2) and the spacing between adjacent horizontal steel strips (3) are both 1 m; S3, prefabricating a transverse steel strip (3) according to the outer diameter of the brick chimney, welding support plates (4) at both ends of the transverse steel strip (3), and opening bolt holes on the support plates (4); S4, first install the vertical steel strips (2), and then install the transverse steel strips (3), wherein: the vertical steel strips (2) are welded together in an overlapping manner, and are fixedly connected to the chimney outer wall (1) by bolts; when installing the transverse steel plate (3), bolts (5) are installed between adjacent support plates (4), and the transverse steel plate (3) is fastened to the outside of the brick chimney by tightening the bolts (5), and then the intersection of the vertical steel strips (2) and the transverse steel strips (3) is welded and fixed; S5, positioning and laying out, marking the installation position of the oblique steel belt (6) on the outside of the vertical steel belt (2) and the transverse steel belt (3), and processing and installing the oblique steel belt (6) so that the oblique steel belt (6) is welded together with the vertical steel belt (2) and the transverse steel belt (3); S6. A steel step is made by using a steel plate positioner, wherein: the steel plate positioner comprises a first positioning plate (11), a second positioning plate (17), a first crowbar (14) and a second crowbar (19); a limit plate (12) is provided at the bottom of the left end of the first positioning plate (11); a U-shaped frame (16) is connected to the middle of the first positioning plate (11) by bolts; a plug hole (13) is dug at the right end of the first positioning plate (11), and a first crowbar is provided in the plug hole (13); there are two second positioning plates (17), each of which has a first position plate (14) and a second position plate (19); 7) The bottom of the outer end is respectively provided with a clamping groove (18), and a second crowbar (19) is rotatably connected between the two second positioning plates (17); during construction, the first positioning plate (11) is installed on the upper right side of the steel step (7), and the first positioning plate (11) and the step side plate are clamped and fixed by the first crowbar (14); the second positioning plate (17) is installed on the left side of the steel step (7), and the second crowbar (19) and the U-shaped frame (16) are used to adjust the inclination angle of the steel step (7), so as to assist the staff in welding and fixing the steel step (7) and the step side plate; S7, after the steel steps (7) are prefabricated, the spiral staircase is installed by means of segmented hoisting, the step side plates (10) on the inner side of each segment of the spiral staircase are firmly welded to the oblique steel belt (6), and after the spiral staircase is installed, the handrail (9) is installed; Installing a steel support (8) at the bottom of the steel step (7); S8. After the handrail (9) is installed, a steel support (8) is installed at the bottom of the spiral ladder. After the construction is completed, the surface of the steel structure is treated with anti-corrosion and rust removal.

5. The construction method of the spiral staircase installation structure of the brick chimney outer wall according to claim 4 is characterized by: The size of the clamping slot (18) matches the size of the step side plate (10), and a matching tightening bolt is provided on the outer wall of the clamping slot (18).

6. The construction method of the spiral staircase installation structure of the brick chimney outer wall according to claim 4 is characterized by: A matching insertion hole is dug at a position on the top of the U-shaped frame (16) corresponding to the first positioning plate (11), and a guide cylinder (15) is arranged above the insertion hole. A tightening bolt is arranged outside the guide cylinder (15).

7. The construction method of the spiral staircase installation structure of the brick chimney outer wall according to claim 4 is characterized by: The position of the clamping slot (18) corresponds to the position of the step side plate.

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