Subway water supply and drainage fire-fighting pipeline unwinding device

Abstract

The invention relates to a subway water supply and drainage fire-fighting pipeline unwinding device which comprises a supporting frame, the supporting frame comprises two stand columns which are oppositely arranged, any stand column is connected with a sliding block in a sliding mode, and two lifting driving mechanisms are arranged on the supporting frame and used for driving the two sliding blocks to ascend and descend in the vertical direction; the inner side of any sliding block is connected with a first connecting rod, the first connecting rod is transversely arranged and rotatably connected to the inner side of the sliding block through the outer end of the first connecting rod, and the rotating axis is collinear with the center line of the first connecting rod; a second connecting rod is slidably connected to the inner end of the first connecting rod, the center lines of the first connecting rod and the second connecting rod are collinear, and a sliding driving mechanism is arranged on the first connecting rod and used for driving the second connecting rod to slide back and forth along the center line; an abutting part is arranged on the periphery of the inner end of the second connecting rod, and a folding and unfolding driving mechanism is arranged on the second connecting rod and used for driving the abutting part to expand or contract in the radial direction; according to the device, the unwinding roller can be replaced, and compared with manual lifting replacement, more time and labor are saved, and safety is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline unwinding, and in particular to an unwinding device for subway water supply, drainage and fire protection pipelines. Background Art

[0002] The unwinding of subway water supply, drainage and fire protection pipelines refers to the process of releasing the pipelines used for water supply, drainage and fire protection systems from the reel and laying them to the predetermined location during the subway construction process. This process is extremely important in subway projects to ensure the smooth installation of pipelines and their subsequent normal use.

[0003] The existing unwinding equipment relies on manual operation, and the unwinding speed is slow, which is difficult to meet the needs of fast construction. Moreover, most of the unwinding rollers are separate components. When replacing them, they need to be lifted by manpower, which is time-consuming and labor-intensive. Moreover, the unwinding rollers are heavy. If they are not operated properly, they can easily cause injuries to people, posing a safety hazard. Summary of the invention

[0004] The purpose of the present invention is to provide a subway water supply, drainage and fire protection pipeline unwinding device to address the problem that in the prior art, when replacing the unwinding roller on the unwinding equipment, manual lifting is used for replacement, which is time-consuming, labor-intensive and has potential safety hazards.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A subway water supply, drainage and fire protection pipeline unwinding device comprises a support frame, the support frame comprises two oppositely arranged columns, a slider is slidably connected to any of the columns, and two lifting drive mechanisms are provided on the support frame, which are respectively used to drive the two sliders to lift and lower vertically; a first connecting rod is connected to the inner side of any of the sliders, the first connecting rod is horizontally arranged, and is rotatably connected to the inner side of the slider through its outer end, and the rotation axis is collinear with the center line of the first connecting rod; a second connecting rod is slidably connected to the inner end of the first connecting rod, the center lines of the first connecting rod and the second connecting rod are collinear, and the first connecting rod is provided with a sliding drive mechanism for driving the second connecting rod to slide forward and backward along the center line; an abutment portion is provided on the outer periphery of the inner end of the second connecting rod, and the second connecting rod is provided with a retraction and extension drive mechanism for driving the abutment portion to expand or contract radially.

[0007] The present invention adopts the above-mentioned technical scheme, when replacing the unwinding roller, the unwinding roller to be replaced is located on the ground, firstly, the position of the support frame is adjusted so that the unwinding roller is located between the two columns, and the slider is driven to rise and fall by the lifting drive mechanism, and the slider drives the first connecting rod to rise and fall until the first connecting rod is aligned with the center of the inner hole of the unwinding roller, and then the second connecting rod is driven to slide to the inside of the inner hole of the unwinding roller by the sliding drive mechanism, and then the abutting part is driven to expand by the retraction and extension drive mechanism until it abuts on the inner hole wall of the unwinding roller, thereby fixing the unwinding roller, and then the slider is driven to rise by the lifting drive mechanism, thereby driving the unwinding roller to rise to a preset unwinding height; compared with the prior art, when replacing the unwinding roller on the unwinding equipment, the manual lifting replacement method is adopted, which is time-consuming, labor-intensive and has safety hazards. The unwinding device provided by the present invention can complete the replacement of the unwinding roller, which is more time-saving and labor-saving and eliminates safety hazards compared with the manual lifting replacement method.

[0008] Furthermore, any one of the columns is provided with a vertical groove, the two grooves are arranged opposite to each other and the openings of both are facing inward; any one of the lifting drive mechanisms includes a first motor and a first screw; the first screw is arranged vertically, one end of which is rotatably connected to the top wall or bottom wall of the groove, and the other end of which is connected to the first motor, and the first motor is used to drive the first screw to rotate; the slider is embedded in the groove and threadedly connected to the first screw; the rotation of the first motor drives the first screw to rotate, and then drives the slider to slide vertically in the groove, and the slider can be driven to rise and fall by controlling the forward and reverse rotation of the first motor.

[0009] Furthermore, the first connecting rod is a cavity structure with an inner end open; the outer end of the second connecting rod extends into the cavity and is slidably connected to the first connecting rod; the sliding drive mechanism is arranged in the cavity, and includes a second motor and a second screw, one end of the second screw is connected to the second motor, and the other end is connected to the second connecting rod through a threaded pair; the rotation of the second motor drives the second screw to rotate, and then drives the second connecting rod to slide along its center line, and the second connecting rod can be driven to slide forward and backward along the center line by controlling the forward and reverse rotation of the first motor.

[0010] Furthermore, the abutment portion includes a plurality of abutment plates arranged at intervals along the circumference of the second connecting rod; a cavity is provided inside the second connecting rod, and a plurality of extension channels arranged at intervals along the circumference are also provided on the outer wall of the second connecting rod, the extension channels are arranged radially, and any extension channel is connected to the cavity; the retraction and extension drive mechanism includes a third motor, a first gear and a plurality of second gears arranged in the cavity, and also includes a plurality of third screws and a third connecting rod; the number of abutment plates, extension channels, third connecting rods, third screws and second gears is the same; the output shaft of the third motor is coaxially connected to the first gear, and the second gear surrounds the first The gears are arranged in an array and are all meshed with the first gear; one end of any third screw is coaxially connected to the second gear, and the other end is connected to the third connecting rod through a threaded pair; the third connecting rod is slidably embedded in the extension channel, and the end of the third connecting rod away from the second gear is connected to the abutment plate; by setting the above structure, the rotation of the third motor drives the first gear to rotate, the first gear drives several second gears to rotate, and the rotation of the second gear drives the third screw to rotate, thereby driving the third connecting rod to move radially in the extension channel, and then driving the abutment plate to move radially, and the abutment part can be driven to expand or contract by controlling the forward and reverse rotation of the third motor.

[0011] Furthermore, a first transmission rod is provided between the first connecting rod and the slider; one end of the first transmission rod is fixedly connected to the outer end face of the first connecting rod, and the other end is rotatably connected to the slider; a fourth motor is provided on the slider, and the fourth motor is transmission-connected to the first transmission rod, and is used to drive the first transmission rod to rotate; after the unwinding roller is fixed, the first connecting rod is driven to rotate by the fourth motor, so that the pipeline on the unwinding roller can be automatically unwound, thereby improving efficiency.

[0012] Furthermore, a driving shell is provided on the slider, the fourth motor is arranged in the driving shell, and a second transmission rod is also provided in the driving shell, the fourth motor is connected to the second transmission rod, and is used to drive the second transmission rod to rotate; a driven wheel and a driving wheel are respectively provided on the first transmission rod and the second transmission rod, and a belt is provided between the driven wheel and the driving wheel; the fourth motor drives the driving wheel to rotate through the second transmission rod, and the driving wheel drives the driven wheel through the belt to rotate the first transmission rod, and then drives the first connecting rod to rotate. This transmission structure is simple, reliable, and easy to implement.

[0013] Furthermore, a transversely arranged positioning frame is connected between the two columns, and a transverse strip hole is opened on the positioning frame. A positioning ring is slidably installed in the strip hole, and the positioning ring can slide along the length direction of the strip hole; during the unwinding operation, the position of the pipeline is positioned by the positioning ring inside the positioning frame, and the position is moved and adjusted following the position of the pipeline to avoid affecting the operation.

[0014] Further, a connecting plate is provided at the bottom of any one of the columns, and a plurality of universal wheels are arranged in an array at the bottom of the connecting plate; arranging a plurality of universal wheels facilitates the movement of the support frame.

[0015] Further, at least two first connecting blocks are provided on one side surface of any one of the connecting plates facing outward or inward, and a vertically arranged hydraulic support rod is provided on any one of the first connecting blocks; after the support frame moves in place, the bottom end of the hydraulic support rod is moved toward the bottom surface in a hydraulic driving manner to form support and fixation for the support frame, facilitating subsequent replacement of the unwinding roller or unwinding operation.

[0016] Further, a cross beam is connected between the tops of the two columns, making the overall shape of the support frame be "冂"-shaped; the support frame has a simple structure and is easy to manufacture.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The unwinding device provided by the present invention can complete the replacement of the unwinding roller. Compared with the method of manual lifting and replacement, it is more time-saving and labor-saving and eliminates potential safety hazards; after the unwinding roller is fixed, the first connecting rod is driven to rotate by the fourth motor, and the pipeline on the unwinding roller can be automatically unwound, improving the efficiency; during the unwinding operation, the position of the pipeline is positioned by the positioning ring inside the positioning frame and is moved and adjusted following the position of the pipeline to avoid affecting the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is Figure 1 an enlarged view of A in

[0020] Figure 3 is Figure 1 an enlarged view of B in

[0021] Figure 4 is a schematic structural diagram of the inside of the support frame;

[0022] Figure 5 is a schematic structural diagram of the inside of the second connecting rod;

[0023] Figure 6 is a schematic structural diagram of the slider.

[0024] Markings in the figure: 1 - Support frame, 2 - Groove, 3 - First connecting rod, 4 - Positioning frame, 5 - Strip-shaped hole, 6 - Universal wheel, 7 - Connecting plate, 8 - Hydraulic support rod, 9 - First connecting block, 10 - Second connecting rod, 11 - Abutting plate, 12 - Third connecting rod, 13 - Positioning ring, 14 - Chute, 15 - Second connecting block, 16 - First screw rod, 17 - First motor, 18 - Second motor, 19 - Slide block, 20 - First screw rod, 22 - Cavity, 23 - Third motor, 24 - First gear, 25 - Second gear, 26 - Third screw rod, 27 - Driving housing, 28 - Fourth motor, 29 - Second transmission rod, 30 - Driving wheel, 31 - Belt, 32 - First transmission rod, 33 - Driven wheel. Specific implementation manner

[0025] The present invention will be described in detail below with reference to the accompanying drawings.

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] This embodiment provides a subway water supply and drainage fire pipeline unwinding device, as Figure 1-Figure 6 shown, which includes a support frame 1. The support frame 1 includes two columns arranged oppositely. A slide block 19 is slidably connected to any one of the columns. Two lifting drive mechanisms are provided on the support frame 1, respectively used to drive the two slide blocks 19 to lift vertically; A first connecting rod 3 is connected to the inner side of any one of the slide blocks 19. The first connecting rod 3 is arranged horizontally and is rotatably connected to the inner side of the slide block 19 through its outer end, and the rotation axis is collinear with the center line of the first connecting rod 3; The inner end of the first connecting rod 3 is slidably connected to a second connecting rod 10. The center lines of the first connecting rod 3 and the second connecting rod 10 are collinear. A sliding drive mechanism is provided on the first connecting rod 3, used to drive the second connecting rod 10 to slide back and forth along the center line; An abutting portion is provided on the outer periphery of the inner end of the second connecting rod 10, and a folding drive mechanism is provided on the second connecting rod 10, used to drive the abutting portion to expand or contract radially; A cross beam is connected between the tops of the two columns, so that the overall shape of the support frame 1 is in a "冂" shape;

[0028] Any column is provided with a groove 2 along the vertical direction, and the two grooves 2 are arranged opposite to each other and the openings of both are facing inwards; any lifting drive mechanism includes a first motor 17 and a first screw 20; the first screw 20 is arranged vertically, one end of which is rotatably connected to the top wall or bottom wall of the groove 2, and the other end of which is connected to the first motor 17, and the first motor 17 is used to drive the first screw 20 to rotate; the slider 19 is embedded in the groove 2 and is threadedly connected to the first screw 20; in addition, the lifting drive mechanism can also be a hydraulic rod fixed on the column, the hydraulic rod is arranged vertically, and its movable end is connected to the slider 19, and the slider 19 can also be driven to rise and fall through hydraulic drive;

[0029] The first connecting rod 3 is a cavity structure, and its inner end is open; the outer end of the second connecting rod 10 extends into the cavity and is slidably connected to the first connecting rod 3; the sliding drive mechanism is arranged in the cavity, which includes a second motor 18 and a second screw 16, one end of the second screw 16 is connected to the second motor 18, and the other end is connected to the second connecting rod 10 through a threaded pair transmission; in addition, the sliding drive mechanism can also be a hydraulic rod arranged transversely in the cavity of the first connecting rod 3, and its movable end is connected to the outer end of the second connecting rod 10, and the second connecting rod 10 can also be driven to slide by hydraulic drive;

[0030] The abutment portion includes a plurality of abutment plates 11 arranged at intervals along the circumference of the second connecting rod 10; a cavity 22 is provided inside the second connecting rod 10, and a plurality of extension channels arranged at intervals along the circumference are also provided on the outer wall of the second connecting rod 10, and the extension channels are arranged radially, and any extension channel is connected to the cavity 22; the retraction and extension drive mechanism includes a third motor 23, a first gear 24 and a plurality of second gears 25 arranged in the cavity 22, and also includes a plurality of third screws 26 and the third connecting rod 12; the abutment plate 11, the extension channel, the third connecting rod 10 ... The number of the connecting rod 12, the third screw rod 26 and the second gear 25 is the same, which is four; the output shaft of the third motor 23 is coaxially connected to the first gear 24, and the second gears 25 are arranged in an array around the first gear 24 and are all meshed with the first gear 24; one end of any third screw rod 26 is coaxially connected to the second gear 25, and the other end is connected to the third connecting rod 12 through a threaded pair transmission; the third connecting rod 12 is slidably embedded in the extension channel, and the end of the third connecting rod 12 away from the second gear 25 is connected to the abutment plate 11;

[0031] In addition, the retraction and extension drive mechanism may also include a plurality of motors disposed in the cavity 22, and also include a plurality of third screws 26 and a third connecting rod 12; the number of the abutment plates 11, the extension channel, the third connecting rod 12, the third screw 26 and the motors is the same, one end of any third screw 26 is coaxially connected to the motor output shaft, and the other end is connected to the third connecting rod 12 through a threaded pair transmission; the third connecting rod 12 is slidably embedded in the extension channel, and the end of the third connecting rod 12 away from the motor is connected to the abutment plate 11; the plurality of motors are of the same model and rotate synchronously, and can drive the plurality of abutment plates 11 to move synchronously in the radial direction;

[0032] A first transmission rod 32 is provided between the first connecting rod 3 and the slider 19; one end of the first transmission rod 32 is fixedly connected to the outer end surface of the first connecting rod 3, and the other end is rotatably connected to the slider 19; a fourth motor 28 is provided on the slider 19, and the fourth motor 28 is transmission-connected to the first transmission rod 32, so as to drive the first transmission rod 32 to rotate;

[0033] The slider 19 is provided with a driving housing 27, a fourth motor 28 is provided in the driving housing 27, a second transmission rod 29 is further provided in the driving housing 27, the fourth motor 28 is connected to the second transmission rod 29, and is used to drive the second transmission rod 29 to rotate; a driven wheel 33 and a driving wheel 30 are respectively provided on the first transmission rod 32 and the second transmission rod 29, and a belt 31 is sleeved between the driven wheel 33 and the driving wheel 30; in addition, it can also be that: a first gear and a second gear are respectively provided on the first transmission rod 32 and the second transmission rod 29, and the two gears are meshed with each other;

[0034] A transverse positioning frame 4 is connected between the two uprights, and a transverse strip hole 5 is provided on the positioning frame 4, and a positioning ring 13 is slidably installed in the strip hole 5, and the positioning ring 13 can slide along the length direction of the strip hole 5; the depth direction of the strip hole 5 is parallel to the ground, and a transverse slide groove 14 is provided on the top wall and the bottom wall of the strip hole 5, and a second connecting block 15 is provided at both the upper and lower ends of the positioning ring 13, and the two second connecting blocks 15 are respectively slidably embedded in the two slide grooves 14;

[0035] A connecting plate 7 is provided at the bottom of any column, and a plurality of universal wheels 6 are arranged in an array at the bottom of the connecting plate 7; at least two first connecting blocks 9 are provided on the side facing outward or inward of any connecting plate 7, and a vertically arranged hydraulic support rod 8 is provided on any first connecting block 9; in this embodiment, two first connecting blocks 9 are provided on the side facing outward of any connecting plate 7, so that there are a total of 4 connecting blocks and 4 hydraulic support rods 8 on the support frame 1;

[0036] The working principle of the present invention is as follows: when replacing the unwinding roller, the support frame 1 is moved by the universal wheel 6 until the unwinding roller is located between the two columns, and the hydraulic support rod 8 inside the first connecting block 9 is moved toward the ground by hydraulic drive to support and fix the support frame 1; then the first motor 17 drives the slider 19 to move downward through the first screw 20, so that the first connecting rod 3 moves to both sides of the unwinding roller and aligns with the center of its inner hole, and then the second motor 18 drives the second connecting rod 10 to move inside the inner hole of the unwinding roller through the second screw 16; after moving to the inside of the unwinding roller, the third motor 23 is activated to drive the first gear 24 to rotate, and the first gear 24 and the plurality of second gears 25 cooperate with each other to drive the third screw 26 to move the third connecting rod 12 outward, so that the abutment plate 11 abuts against the inner wall of the unwinding roller to fix the unwinding roller; then, the first motor 17 can be used to drive the first connecting rod 3 to rise to a suitable position; at the same time, the hydraulic support rod 8 is separated from the ground; then, the support frame 1 can be moved to the working position through the universal wheel 6;

[0037] When unwinding, the pipeline is passed through the positioning ring 13 to position the pipeline, and the fourth motor 28 drives the driving wheel 30 to rotate through the second transmission rod 29. The driving wheel 30 drives the driven wheel 33 through the belt 31 to make the first transmission rod 32 drive the first connecting rod 3 to rotate, so that the unwinding roller can unwind the pipeline;

[0038] During the unwinding operation, the positioning ring 13 slides inside the slide groove 14 through the second connecting blocks 15 on both sides to move according to the unwinding position of the pipeline to avoid the influence thereof.

[0039] It should be noted that the first motor 17, the second motor 18, the third motor 23 and the fourth motor 28 in the present invention are all existing technology products. The technical personnel in this field select, install and complete the circuit debugging work according to the needs of use to ensure that all electrical appliances can work normally. The components are all universal standard parts or components known to the technical personnel in this field. Their structures and principles can be known to the technical personnel through technical manuals or through conventional experimental methods. The applicant does not make any specific restrictions here.

[0040] According to the present invention adopting the above-mentioned technical solution, the unwinding device can complete the replacement of the unwinding roller, which is more time-saving and labor-saving and eliminates safety hazards compared to the manual lifting and replacement method; at the same time, after the unwinding roller is fixed, the first connecting rod is driven to rotate by the fourth motor, so that the pipeline on the unwinding roller can be automatically unwound, thereby improving efficiency; during the unwinding operation, the position of the pipeline is positioned by the positioning ring inside the positioning frame, and the pipeline is moved and adjusted following the position of the pipeline to avoid affecting the operation.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A subway water supply, drainage and fire protection pipeline unwinding device, characterized by: The invention comprises a support frame (1), wherein the support frame (1) comprises two columns arranged opposite to each other, wherein a slider (19) is slidably connected to any of the columns, and the support frame (1) is provided with two lifting drive mechanisms, which are respectively used to drive the two sliders (19) to lift and lower vertically; a first connecting rod (3) is connected to the inner side of any of the sliders (19), the first connecting rod (3) is arranged horizontally, and is rotatably connected to the inner side of the slider (19) through its outer end, and the rotation axis is colinear with the center line of the first connecting rod (3); a second connecting rod (10) is slidably connected to the inner end of the first connecting rod (3), the center lines of the first connecting rod (3) and the second connecting rod (10) are colinear, and a sliding drive mechanism is provided on the first connecting rod (3), which is used to drive the second connecting rod (10) to slide forward and backward along the center line; an abutment portion is provided on the outer periphery of the inner end of the second connecting rod (10), and a retracting and expanding drive mechanism is provided on the second connecting rod (10), which is used to drive the abutment portion to expand or retract radially.

2. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized in that: Any column is provided with a groove (2) along the vertical direction, and the two grooves (2) are arranged opposite to each other and the openings of both are facing inwards; any lifting drive mechanism comprises a first motor (17) and a first screw (20); the first screw (20) is arranged along the vertical direction, one end of which is rotatably connected to the top wall or the bottom wall of the groove (2), and the other end of which is connected to the first motor (17), and the first motor (17) is used to drive the first screw (20) to rotate; the slider (19) is embedded in the groove (2) and is threadedly connected to the first screw (20).

3. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized in that: The first connecting rod (3) is a cavity structure with an inner end open; the outer end of the second connecting rod (10) extends into the cavity and is slidably connected to the first connecting rod (3); the sliding drive mechanism is arranged in the cavity, and comprises a second motor (18) and a second screw rod (16); one end of the second screw rod (16) is connected to the second motor (18), and the other end is connected to the second connecting rod (10) through a threaded pair transmission.

4. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized in that: The abutting portion includes a plurality of abutting plates (11) arranged at intervals in the circumferential direction of the second connecting rod (10); a cavity (22) is provided inside the second connecting rod (10), and a plurality of extension channels arranged at intervals in the circumferential direction are further formed on the outer wall of the second connecting rod (10). The extension channels are arranged radially, and any one of the extension channels communicates with the cavity (22); the expansion and contraction driving mechanism includes a third motor (23), a first gear (24) and a plurality of second gears (25) arranged in the cavity (22), and further includes a plurality of third screws (26) and third connecting rods (12); the number of the abutting plates (11), the extension channels, the third connecting rods (12), the third screws (26) and the second gears (25) is the same; the output shaft of the third motor (23) is coaxially connected with the first gear (24), the second gears (25) are arranged in an array around the first gear (24) and are all meshed with the first gear (24); one end of any one of the third screws (26) is coaxially connected with the second gear (25), and the other end is in threaded transmission connection with the third connecting rod (12); the third connecting rod (12) is slidably installed in the extension channel, and one end of the third connecting rod (12) away from the second gear (25) is connected with the abutting plate (11).

5. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized in that: A first transmission rod (32) is provided between the first connecting rod (3) and the slider (19); one end of the first transmission rod (32) is fixedly connected to the outer end face of the first connecting rod (3), and the other end is rotatably connected to the slider (19); a fourth motor (28) is provided on the slider (19), and the fourth motor (28) is in transmission connection with the first transmission rod (32) for driving the first transmission rod (32) to rotate.

6. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 5 is characterized in that: A driving housing (27) is provided on the slider (19), the fourth motor (28) is arranged in the driving housing (27), and a second transmission rod (29) is further provided in the driving housing (27). The fourth motor (28) is connected to the second transmission rod (29) for driving the second transmission rod (29) to rotate; driven wheels (33) and driving wheels (30) are respectively provided on the first transmission rod (32) and the second transmission rod (29), and a belt (31) is sleeved between the driven wheel (33) and the driving wheel (30).

7. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized by: A horizontally arranged positioning frame (4) is connected between the two columns. A strip-shaped hole (5) is formed in the positioning frame (4) along the horizontal direction, and a positioning ring (13) is slidably installed in the strip-shaped hole (5). The positioning ring (13) can slide along the length direction of the strip-shaped hole (5).

8. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized by: A connecting plate (7) is provided at the bottom of any one of the columns, and a plurality of universal wheels (6) are arranged in an array at the bottom of the connecting plate (7).

9. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 8 is characterized in that: At least two first connecting blocks (9) are provided on one side surface of any one of the connecting plates (7) facing outward or inward, and a hydraulic support rod (8) is provided vertically on any one of the first connecting blocks (9).

10. The unwinding device for subway water supply, drainage and fire fighting pipelines according to claim 1 is characterized in that: A cross beam is connected between the tops of the two columns, so that the whole support frame (1) is in a "冂" shape.

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