Floor pipe and its preparation device and preparation method

Abstract

The present invention relates to a floor pipeline and its preparation device and preparation method. The floor pipeline includes at least two prefabricated pipeline plates, and the prefabricated pipeline plates are arranged to form a pipe body with an "L" - shaped, "凵" - shaped or square cross - section. An injection part formed by pouring is provided between adjacent prefabricated pipeline plates to combine the prefabricated pipeline plates into one body. The floor pipeline preparation device of the floor pipeline includes an angle steel with a notch facing upwards, sealing plates respectively arranged at the front and rear ends of the angle steel, and a diagonal brace connected to the lower part of the side wall of the angle steel. The two side walls of the angle steel are respectively used for placing prefabricated pipeline plates. The present invention processes prefabricated pipeline plates made in advance into floor pipelines. In this way, the prefabricated pipeline plates can be directly transported to the construction site for pouring into floor pipelines. Compared with the transportation of the finished floor pipeline, the transportation of the prefabricated pipeline plates is more convenient, greatly saving the transportation cost.

Description

Technical Field

[0001] The present invention relates to a floor pipeline and its preparation device and preparation method. Background Art

[0002] Floor pipelines in buildings are mainly divided into flue pipes and drain pipes. At present, the preparation processes of floor pipelines on the market are as follows: 1. Handmade: The wall thickness, density, and strength cannot meet the relevant requirements; 2. Semi-handmade and semi-mechanized: Low output, heavy weight, uneven quality, serious damage, and great difficulty in transportation and installation; 3. Fully mechanical production: High input cost and low return rate, low die conversion rate, large floor area but ineffective utilization, and high mechanical maintenance cost. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a floor pipeline with a simple structure and a simple manufacturing method; the second purpose of the present invention is to provide a preparation device for preparing the floor pipeline and a preparation method for preparing the floor pipeline.

[0004] The purpose of the present invention is achieved through the following technical solutions: A floor pipeline includes at least two precast pipeline plates. The precast pipeline plates are arranged to form a pipe body with an "L" - shaped, "凵" - shaped, or square cross - section. A casting part formed by casting is provided between adjacent precast pipeline plates to combine the precast pipeline plates into one body.

[0005] The floor pipeline preparation device for the floor pipeline includes an angle steel with a notch facing upwards, plugging plates respectively arranged at the front and rear ends of the angle steel, and a diagonal brace connected to the lower side of the side wall of the angle steel. The two side walls of the angle steel are respectively used for placing precast pipeline plates.

[0006] The floor pipeline preparation device further includes a plurality of limiting members. The limiting member includes a limiting rod, and the limiting rod is vertically inserted between the two side walls of the angle steel.

[0007] The method for preparing a floor pipeline using the above - mentioned preparation device includes the following steps:

[0008] Step I: Place two precast pipeline plates on the surfaces of the two side walls of the angle steel respectively, and vertically and intermittently insert a plurality of limiting members between the two precast pipeline plates from front to back, so as to form a gap between the two precast pipeline plates.

[0009] Step II: Then pour cement into the gap between the two precast pipeline plates, so that the cement covers the bottom edges of the two precast pipeline plates.

[0010] Step III: After the cement is semi - dry, pull out the limiting members, and then pour cement to fill the pores left after pulling out the limiting members.

[0011] Step Ⅳ: After the cement has solidified, remove the two precast pipe slabs cast as a single unit from the angle steel, i.e., demold them, to obtain an L-shaped floor pipe with an "L"-shaped cross-section.

[0012] Step Ⅴ: Place the L-shaped floor pipe in the angle steel and make only one of the precast pipe slabs of the L-shaped floor pipe fit against one side wall of the angle steel; then place a precast pipe slab on the other side wall of the angle steel, and vertically and sequentially insert a number of limiting members at intervals from front to back between this precast pipe slab and the precast pipe slab of the L-shaped floor pipe to form a gap between the two precast pipe slabs; then pour cement into this gap, allowing the cement to cover the bottom edges of the two precast pipe slabs.

[0013] After the cement is semi-dry, pull out the limiting members, and then pour cement again to fill the pores left after pulling out the limiting members.

[0014] After the cement has solidified, remove the fabricated floor pipe from the angle steel, i.e., demold it, to obtain a frame-shaped floor pipe with a "凵"-shaped cross-section.

[0015] Step Ⅵ: Place the frame-shaped floor pipe in the angle steel and make only the precast pipe slab on one side of the frame-shaped floor pipe fit against one side wall of the angle steel;

[0016] Then place a precast pipe slab on the other side wall of the angle steel, and insert limiting members at the front and back ends between the two precast pipe slabs to form a gap between the two precast pipe slabs. Then pour cement into this gap, allowing the cement to cover the bottom edges of the two precast pipe slabs.

[0017] After the cement is semi-dry, pull out the limiting members, and then pour cement again to fill the pores left after pulling out the limiting members.

[0018] After the cement has solidified, separate the semi-finished floor pipe from the angle steel, and rotate this semi-finished floor pipe so that the only remaining gap between adjacent precast pipe slabs on the floor pipe turns to the corner of the angle steel. Then pour cement into this gap, allowing the cement to cover the bottom edges of the precast pipe slabs on both sides of this gap. After the cement has solidified, separate the finished floor pipe from the angle steel to obtain a square floor pipe.

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] 1. The present invention responds to the development trend of assembly, and can achieve industrialized and standardized production; the manufacturing equipment occupies a small area, and a warehousing factory can be built; it does not require skilled workers to operate, which is convenient for standardized management; the precast pipe slabs are convenient for transportation, and can be cast and assembled on site, and cross-regional operation can be easily achieved.

[0021] 2. The present invention processes prefabricated pipe plates made in advance into floor pipes. In this way, the prefabricated pipe plates can be directly transported to the construction site for pouring into floor pipes. Compared with the transportation of the finished floor pipes, the transportation of the prefabricated pipe plates is more convenient, greatly saving the transportation cost.

[0022] 3. When preparing the floor pipes of the present invention, the pouring part at the corner of the floor pipes only accounts for a small part of the entire floor pipes. The contact area between the pouring part and the angle steel is small, which is convenient for demoulding and greatly improves the production efficiency of the floor pipes.

[0023] 4. In the floor pipe manufacturing process, the corner pouring between the prefabricated pipe plates is placed inside the angle steel. Since the angle bisector of the angle steel is perpendicular, when pouring, due to the gravity of the cement (or concrete), a horizontal plane will be formed on the upper side of the pouring part. And the prefabricated pipe plates are inclined, so that an inner chamfer will be naturally formed between the pouring part and the inner side of the prefabricated pipe plates, thus eliminating the inner chamfering process in the traditional manufacturing. The inner chamfer of the pouring part plays a strengthening role, making the floor pipes of the present invention more stable.

[0024] 5. The made "L"-shaped and "凵"-shaped floor pipes can also directly install the downpipe or other exposed objects that need to be covered to play a role in wrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural view of the "L"-shaped floor pipe of the present invention.

[0026] Figure 2 is a schematic structural view of the frame-shaped floor pipe of the present invention.

[0027] Figure 3 is a schematic structural view of the square floor pipe of the present invention.

[0028] Figure 4 is a schematic structural view of the floor pipe preparation device of the present invention.

[0029] Figure 5 is a cross-sectional view of the floor pipe preparation device of the present invention.

[0030] Figure 6 is a schematic structural view of an embodiment of the limiting member of the present invention.

[0031] Figure 7 is a process flow chart of Embodiment 1 of the present invention.

[0032] Figure 8 is a process flow chart of Step V in Embodiment 2 of the present invention.

[0033] Fig. 9 is a process flow chart of Step VI in Embodiment 3 of the present invention.

[0034] Fig.10 It is the process flow chart of Step V in the fourth embodiment of the present invention.

[0035] Fig.11 It is the positional relationship diagram of the angle iron and the precast pipe plate in the fifth embodiment of the present invention.

[0036] Fig.12 It is Fig.11 The enlarged view of III in

[0037] Fig.13 It is the schematic diagram of Step III in the fifth embodiment.

[0038] Fig.14 It is the schematic structural diagram of another embodiment of the limiting member of the present invention.

[0039] Fig.15 It is the schematic diagram of the positional relationship between two precast pipe plates with inclined lower side walls and a floor pipe preparation device.

[0040] Fig.16 It is Fig.15 The enlarged view of I in

[0041] Fig.17 It is the schematic diagram of the positional relationship between two precast pipe plates with wavy lower side walls and a floor pipe preparation device.

[0042] Fig.18 It is Fig.17 The enlarged view of II in

[0043] Label description: 1 precast pipe plate, 2 pouring part, 21 inner chamfer, 22 outer right angle, 3 angle steel, 4 plugging plate, 5 diagonal brace, 6 limiting member, 61 limiting rod, 611 inclined plane A, 62 weight block, 621 inclined plane B, 7 support member, 8 angle iron. Detailed implementation manners

[0044] The content of the present invention will be described in detail below in conjunction with the specification drawings and embodiments:

[0045] As Figure 1-3 Shown is the schematic diagram of the embodiment of the floor pipe provided by the present invention.

[0046] The floor pipe includes at least two precast pipe plates 1, and the precast pipe plates 1 are arranged in a row to form a pipe body with an "L" - shaped, "凵" - shaped or square cross - section. The adjacent precast pipe plates 1 are combined into one body through the pouring part 2 formed by pouring.

[0047] The precast pipe plate 1 can be a precast cement pressure plate or a plate - shaped structure precast from other materials such as concrete.

[0048] As Figure 1-3As shown: The cross-section of the floor pipe is "L"-shaped, "U"-shaped or square-shaped.

[0049] The "L"-shaped floor pipe is suitable for installation in the internal angled wall structure of a building; the "U"-shaped floor pipe is suitable for installation in the flat wall structure of a building; the square-shaped (i.e., "mouth"-shaped) floor pipe is suitable for installation in various wall structures of a building.

[0050] The inner angle between adjacent precast pipe plates 1 is an inner chamfer 21 formed by pouring, and the outer angle is an outer right angle 22, that is, the inner side wall of the pouring part 2 forms an inner chamfer 21 between adjacent precast pipe plates 1, and the two outer side walls of the pouring part 2 form an outer right angle 22 between adjacent precast pipe plates 1.

[0051] The described floor pipe can be a flue pipe, a drainage pipe, etc.

[0052] The upper side wall and / or the lower side wall of the precast pipe plate is an inclined surface that is not perpendicular to the left and right side walls or is a wavy surface. The setting of the inclined surface or the wavy surface enables the pouring part 2 formed by pouring to combine adjacent precast pipe plates 1 into one body more firmly.

[0053] Such as Fig.15 、 16 are schematic diagrams of the positional relationship between two precast pipe plates with inclined lower side walls and a floor pipe preparation device. Fig.17 、 18 are schematic diagrams of the positional relationship between two precast pipe plates with wavy lower side walls and a floor pipe preparation device.

[0054] Such as Figure 4 、 5 、6 show schematic diagrams of an embodiment of a floor pipe preparation device for preparing the described floor pipe provided by the present invention.

[0055] The floor pipe preparation device includes an angle steel 3 with a notch facing upwards, plugging plates 4 respectively arranged at the front and rear ends of the angle steel 3, and a diagonal brace 5 connected to the lower side of the side wall of the angle steel 3; the two side walls of the angle steel 3 are respectively used for placing precast pipe plates 1.

[0056] The described floor pipe preparation device further includes a plurality of limit members 6; the limit member 6 includes a limit rod 61, and the limit rod 61 is vertically inserted between the two side walls of the angle steel 3.

[0057] The limit member 6 is used to limit the position of the precast pipe plate 1, prevent the precast pipe plate 1 from sliding down, and leave a gap between the two precast pipe plates 1 through which cement or concrete can pass.

[0058] The bottom end of the limit rod 61 is provided with two inclined surfaces A611 that are respectively in contact with the corresponding side walls of the angle steel 3, and the two inclined surfaces A611 of the limit rod 61 form a 45° angle. Figure 6 The median angle β is 45°.

[0059] The limiting rod 61 is preferably inserted on the connecting line of the two side walls of the angle steel 3, and the two inclined surfaces A611 of the limiting rod 61 are respectively in contact with the corresponding side walls of the angle steel 3.

[0060] The setting of the inclined surface A611 at the bottom end of the limiting rod 61 enables the limiting rod 61 to stand firmly between the two prefabricated pipeline plates 1 under the action of the prefabricated pipeline plates 1 on both sides and the two side walls of the angle steel 3 to limit the two prefabricated pipeline plates 1.

[0061] like Figure 14-18 As shown: the limit member 6 also includes a weight block 62 which is sleeved on the limit rod 61 and can slide up and down relative to the limit rod 61; the weight block 62 is stuck between the prefabricated pipeline plates 1 located on the two side walls of the angle steel 3, and the right side wall and the left side wall of the weight block 62 are inclined surfaces B621 which are respectively fitted with the prefabricated pipeline plates 1 located on the two side walls of the angle steel 3.

[0062] The right side wall and the left side wall of the weight block 62 form an angle of 90°. Fig.14 As shown, the cross section of the weight block 62 is an isosceles right triangle. Fig.14 The median angle α is 90°.

[0063] A through hole extending longitudinally and through which the limit rod is passed is provided at the center of the weight block 62 .

[0064] The gravity of the weight block 62 itself can generate a certain force on the prefabricated pipeline plate 1 located on the two side walls of the angle steel 3, so as to further limit the position of the prefabricated pipeline plate 1.

[0065] Several methods for preparing floor pipes using the floor pipe preparation device are described in detail below:

[0066] Example 1: Preparation of L-shaped floor pipes:

[0067] like Figure 7 As shown: A method for preparing floor pipes using the preparation device, which comprises the following steps:

[0068] Step I: Place two prefabricated pipe plates 1 on the two side wall surfaces of the angle steel 3, and insert a number of stoppers 6 (such as Figure 7 a), the limiting member 6 forms a gap between the two prefabricated pipeline plates 1 (when the limiting member 6 is inserted between the two prefabricated pipeline plates 1, the inclined surface A611 at the bottom end of the limiting rod 61 fits with the side wall of the angle steel 3);

[0069] Step Ⅱ: Then, pour cement (or concrete) into the gap between the two prefabricated pipe slabs 1 until the cement covers the bottom edges of the two prefabricated pipe slabs 1. At this time, an inner chamfer 21 is formed between the two prefabricated pipe slabs 1 (as shown in Figure 7 Figure b).

[0070] Step Ⅲ: After the cement is semi-dry, pull out the limiting members 6, and then pour cement to fill the pores left after pulling out the limiting members 6 (as shown in Figure 7 Figure c);

[0071] Step Ⅳ: After the cement solidifies, remove the two prefabricated pipe slabs 1 cast into one body from the angle steel 3, that is, demold, and obtain an L-shaped floor pipe with an "L"-shaped cross-section.

[0072] This L-shaped floor pipe can be used for establishing floor pipes at the floor corners.

[0073] Example 2: Preparation of a frame-shaped floor pipe:

[0074] The preparation steps of the frame-shaped floor pipe are to reprocess the L-shaped floor pipe on the basis of the already made L-shaped floor pipe. Therefore, Steps Ⅰ to Ⅳ in Example 2 are the same as those in Example 1, and only Step Ⅴ is further included.

[0075] As shown in Figure 8 : Step Ⅴ includes the following steps:

[0076] Step Ⅴ: Place the L-shaped floor pipe in the angle steel 3 and make only one of the prefabricated pipe slabs 1 of the L-shaped floor pipe fit against one side wall of the angle steel 3;

[0077] Then, place a prefabricated pipe slab 1 on the other side wall of the angle steel 3, and vertically and sequentially insert a number of limiting members 6 at intervals from front to back between the prefabricated pipe slab 1 of the L-shaped floor pipe and the prefabricated pipe slab 1 (as shown in Figure 8 Figure a), so as to form a gap between the two prefabricated pipe slabs 1. Then, pour cement into this gap until the cement covers the bottom edges of the two prefabricated pipe slabs 1. At this time, an inner chamfer 21 is also formed between the two prefabricated pipe slabs 1 (as shown in Figure 8 Figure b);

[0078] After the cement is semi-dry, pull out the limiting members 6, and then pour cement to fill the pores left after pulling out the limiting members 6 (as shown in Figure 8 Figure c);

[0079] After the cement solidifies, remove the made floor pipe from the angle steel 3, that is, demold, and obtain a frame-shaped floor pipe with a "凵"-shaped cross-section.

[0080] Example 3: Preparation of a square floor pipe:

[0081] The preparation step of the square floor pipe in the third embodiment is to reprocess the frame-shaped floor pipe on the basis of the already manufactured frame-shaped floor pipe. Therefore, the steps I to IV in the third embodiment are the same as those in the first embodiment, and the step V is the same as that in the second embodiment, and only the step VI is included.

[0082] like Fig. 9 As shown: Step VI includes the following steps:

[0083] Step VI: placing the frame-shaped floor pipe in the angle steel 3 and making only the prefabricated pipe plate 1 on one side of the frame-shaped floor pipe fit with one side wall of the angle steel 3;

[0084] Next, a prefabricated pipe plate 1 is placed on the other side wall of the angle steel 3, and a stopper 6 is inserted between the front and rear ends of the two prefabricated pipe plates 1 that are attached to the side wall of the angle steel 3. A support member 7 (such as a support member 7 for stabilizing the frame-shaped floor pipe) is placed between the other side wall of the frame-shaped floor pipe and the side wall of the angle steel 3. Fig. 9 a), the limiting member 6 forms a gap between the two prefabricated pipeline plates 1, and then cement is poured in the gap so that the cement covers the bottom edges of the two prefabricated pipeline plates 1; at this time, an inner chamfer 21 is also formed between the two prefabricated pipeline plates 1 (as shown in FIG. Fig. 9 b);

[0085] After the cement is half dry, the stopper 6 is pulled out, and cement is poured to fill the pores left after the stopper 6 is pulled out (such as Fig. 9 c);

[0086] After the cement solidifies, the semi-finished floor pipe is separated from the angle steel 3, and the semi-finished floor pipe is rotated so that the only remaining gap between the adjacent prefabricated pipe plates 1 on the semi-finished floor pipe is transferred to the angle of the angle steel 3 (such as Fig. 9 d), and then pour cement in the gap so that the cement covers the bottom edge of the prefabricated pipe plate 1 on both sides of the gap (as shown in FIG. Fig. 9 e), after the cement solidifies, the finished floor pipe is separated from the angle steel 3 to obtain a square floor pipe.

[0087] The support member 7 may be any type of support member that can stabilize the frame-shaped floor pipe structure, such as a support plate.

[0088] Example 4: Preparation of square floor pipes:

[0089] The preparation step of the square floor pipe in the fourth embodiment is to reprocess the L-shaped floor pipe on the basis of the already manufactured L-shaped floor pipe. Therefore, the steps I to IV in the fourth embodiment are the same as those in the first embodiment, and only the step V is included.

[0090] like Fig.10 As shown: Step V includes the following steps:

[0091] Step V: Assemble the two L-shaped floor pipes into a tubular structure with a square cross section and place it on the angle steel 3. When the two L-shaped floor pipes are placed on the angle steel 3, ensure that one of the joints of the two L-shaped floor pipes is at the angle of the angle steel 3, and then insert the limit pieces 6 (such as Fig.10 a), so that a gap is formed between the two prefabricated pipeline plates 1, and then cement is poured in the gap so that the cement covers the bottom edges of the two prefabricated pipeline plates 1 (as shown in FIG. Fig.10 b);

[0092] After the cement is half dry, the stopper 6 is pulled out, and cement is poured to fill the pores left after the stopper 6 is pulled out (such as Fig.10 c);

[0093] After the cement solidifies, the semi-finished floor pipe is separated from the angle steel 3, and the semi-finished floor pipe is rotated so that the only remaining gap between the adjacent prefabricated pipe plates 1 on the semi-finished floor pipe is transferred to the angle of the angle steel 3 (such as Fig.10 d), and then pour cement in the gap so that the cement covers the bottom edge of the prefabricated pipe plate 1 on both sides of the gap (as shown in FIG. Fig.10 e), after the cement solidifies, the finished floor pipe is separated from the angle steel 3 to obtain a square floor pipe.

[0094] Example 5: Preparation of L-shaped floor pipes:

[0095] The difference between the fifth embodiment and the first embodiment is that the present embodiment further uses an angle iron 8 (step II in the fifth embodiment) to further stabilize the position of the prefabricated pipeline plate 1. The specific operations of the fifth embodiment are as follows:

[0096] The method for preparing floor pipes using the preparation device comprises the following steps:

[0097] Step I: two prefabricated pipeline plates 1 are placed on the two side wall surfaces of the angle steel 3 respectively, and a plurality of stoppers 6 are inserted vertically and spaced apart from the front to the back between the two prefabricated pipeline plates 1, so that a gap is formed between the two prefabricated pipeline plates 1 by the stoppers 6;

[0098] Step II: Then, in the gap between the two prefabricated pipeline plates 1, a plurality of angle irons 8 are sequentially arranged from front to back, one side wall of the angle iron 8 is fixed to one of the prefabricated pipeline plates 1 by bolts, and the other side wall of the angle iron is fixed to the other prefabricated pipeline plate 1 by bolts (such as Fig.11 , 12 As shown, Fig.11 is a position relationship diagram of the angle iron 8 and the prefabricated pipeline plate 1);

[0099] Step III: Then pour cement (or concrete) in the gap between the two prefabricated pipe plates 1, so that the cement covers the bottom edges of the two prefabricated pipe plates 1 (or even directly covers the upper edges of the two side walls of the angle iron 8, such as Fig.13 At this time, an inner chamfer 21 is formed between the two prefabricated pipeline plates 1.

[0100] Step IV: After the cement is half dry, pull out the limiter 6, and then pour cement to fill the gap left after the limiter 6 is pulled out;

[0101] Step V: After the cement solidifies, the two prefabricated pipe plates 1 cast into one are removed from the angle steel 3, that is, demoulding is performed to obtain an L-shaped floor pipe with an "L"-shaped cross-section.

Claims

1. A method for preparing a floor pipeline using a floor pipeline preparation device, characterized in that: It includes the following steps: Step Ⅰ: Place two precast pipe plates (1) on the side wall surfaces of the angle steel (3) respectively. Insert a number of limiting members (6) vertically and at intervals from front to back between the two precast pipe plates (1) to form a gap between the two precast pipe plates (1); Step Ⅱ: Then pour cement into the gap between the two precast pipe plates (1) to submerge the bottom edges of the two precast pipe plates (1); Step Ⅲ: After the cement is semi-dry, pull out the limiting members (6), and then pour cement to fill the pores left after pulling out the limiting members (6); Step Ⅳ: After the cement solidifies, take the two precast pipe plates (1) cast into one body out of the angle steel (3) for demoulding to obtain an L-shaped floor pipe with an "L”-shaped cross-section; Among them, the floor pipe includes at least two precast pipe plates (1). The precast pipe plates (1) are arranged to form a pipe body with an "L”-shaped, "凵”-shaped or square cross-section. The adjacent precast pipe plates (1) are combined into one body through a casting part (2) formed by casting; The inner included angle between adjacent precast pipe plates (1) is an inner chamfer (21) formed by casting, and the outer included angle is an outer right angle (22); The upper side wall and / or the lower side wall of the precast pipe plate is an inclined surface non-perpendicular to the left and right side walls or a wavy surface; The floor pipe preparation device includes an angle steel (3) with an upward slot opening, sealing plates (4) respectively arranged at the front and rear ends of the angle steel (3), and a diagonal brace (5) connected to the lower part of the side wall of the angle steel (3). The two side walls of the angle steel (3) are respectively used for placing precast pipe plates (1); The floor pipe preparation device further includes a number of limiting members (6). The limiting member (6) includes a limiting rod (61), and the limiting rod (61) is vertically inserted between the two side walls of the angle steel (3); The bottom end of the limiting rod (61) is provided with two inclined surfaces A (611) respectively fitting with the corresponding side walls of the angle steel (3). The two inclined surfaces A (611) of the limiting rod (61) form a 45° angle; The limiting member (6) further includes a weight block (62) sleeved on the limiting rod (61) and capable of sliding up and down relative to the limiting rod (61). The weight block (62) is stuck between the precast pipe plates (1) on the two side walls of the angle steel (3). The right side wall and the left side wall of the weight block (62) are inclined surfaces B (621) fitting with the precast pipe plates (1) on the two side walls of the angle steel (3); The right side wall and the left side wall of the weight block (62) form a 90° angle.

2. The method for preparing floor pipes according to claim 1, characterized in that: It further includes Step Ⅴ; Step Ⅴ: Place the L-shaped floor pipe in the angle steel (3) and only make one of the precast pipe plates (1) of the L-shaped floor pipe fit with one side wall of the angle steel (3); Then place a precast pipe plate (1) on the other side wall of the angle steel (3), and insert a number of limiting members (6) vertically and at intervals from front to back between the precast pipe plate (1) and the precast pipe plate (1) of the L-shaped floor pipe to form a gap between the two precast pipe plates (1). Then pour cement into the gap to submerge the bottom edges of the two precast pipe plates (1); After the cement is semi-dry, pull out the limit piece (6), and then pour cement to fill the pores left after pulling out the limit piece (6); After the cement solidifies, take the fabricated floor pipe out of the angle steel (3) to demold, and obtain a frame-shaped floor pipe with a "凵"-shaped cross-section.

Images