CN114433936B

CN114433936B - Adjustable cutting device of building steel sparkproof

Info

Publication number: CN114433936B
Application number: CN202210146465.2A
Authority: CN
Inventors: 黄德胜
Original assignee: Shenzhen Xiangsheng Steel Trading Co ltd
Current assignee: Shenzhen Xiangsheng Steel Trading Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-11-15
Anticipated expiration: 2042-02-17
Also published as: CN114433936A

Abstract

The invention relates to a cutting device, in particular to an adjustable cutting device for fire prevention of building steel. The invention provides an adjustable cutting device for fire prevention of building steel with high safety. The utility model provides an adjustable cutting device of building steel spark, is including frame, first support frame, second support frame, guide rail, gear box, a driving motor etc. and the interior bottom of frame is connected with two first support frames, and two first support frames are bilateral symmetry formula setting, and the left side of bottom is connected with the second support frame in the frame. Through using second driving motor as drive power, can make two-way lead screw rotatory, under two-way lead screw and two sliding frame screw-thread fit's effect, two sliding frame move to the direction that is close to each other and close, and the spark that produces can be blocked by two sliding frame when the steel pipe cutting to this can effectually guarantee staff's personal safety.

Description

Adjustable cutting device of building steel sparkproof

Technical Field

The invention relates to a cutting device, in particular to an adjustable cutting device for fire prevention of building steel.

Background

A large amount of building materials need to be used in the building construction, the building materials comprise stones, cement, gravels, steel pipes and the like, wherein the steel pipes are divided into seamless steel pipes and seam steel pipes, the seamless steel pipes can be sold to consumers after the steel pipes are produced, after the consumers purchase the steel pipes, planning and cutting are carried out on the raw materials of the steel pipes according to the requirements of the building construction and the difference of the environment, the planned and cut steel pipes can be put into the building site for use, a large amount of sparks can be generated during the cutting of the steel pipes, and the sparks can easily hurt workers.

The patent granted publication No. CN207695729U stainless steel pipe cutting device comprises a base, fixing columns arranged at two ends of the base and installation side plates arranged between the fixing columns, wherein a supporting column is arranged at a position of the base between the fixing columns, a steel pipe cutting device is arranged on the supporting column, a steel pipe supporting block is arranged on the installation side plates, a steel pipe is arranged on the steel pipe supporting block, one end of the steel pipe is arranged on the steel pipe supporting block, the other end of the steel pipe penetrates through the steel pipe cutting device, the steel pipe cutting device comprises a rotary table, a transmission disc arranged on one side of the rotary table and a connecting disc arranged on one side of the transmission disc, a slide rail is arranged on the rotary table, a slide block is arranged on the slide rail in a matched mode, and a cutting device is arranged on the slide block; the utility model discloses a motor, including base, support column, motor and carousel, be equipped with the mounting panel in the position department that is close to the support column on the base, mounting panel upper end position is equipped with first cylinder, and lower extreme position is equipped with the second cylinder, be equipped with the motor in the position department that corresponds with the carousel on the base, be equipped with the hold-in range between motor and the carousel to be connected through synchronous belt drive.

Although the device can drive the carousel through starter motor and rotate, rethread first cylinder and second cylinder promote connection pad forward motion, thereby the second connecting rod drives the slider linkage, and then make cutting device cut the steel pipe, and then the speed of cutting the steel pipe has been improved, and the quality of cutting has been improved, but the spark that produces when the device can't protect the steel pipe cutting, the spark splashes easily on one's body at the staff, thereby injury staff, make staff's personal safety can't be ensured like this, the security is low.

In order to solve the problems in the prior art, it is necessary to design an adjustable cutting device for preventing spark in construction steel, so that the effects of preventing spark from splashing and having high safety are achieved.

Disclosure of Invention

In order to overcome the unable protection spark of present steel pipe cutting device for staff's personal safety can't be ensured, the low shortcoming of security, the technical problem who solves is: the utility model provides a high adjustable cutting device of building steel spark of security.

The technical scheme of the invention is as follows: the utility model provides an adjustable cutting device of building steel sparkproof, which comprises a frame, first support frame, the second support frame, the guide rail, the gear box, a driving motor, the blade, adjustment mechanism and slide mechanism, the interior bottom of frame is connected with two first support frames, two first support frames are the bilateral symmetry formula setting, the left side of bottom is connected with the second support frame in the frame, the second support frame is located the left of the first support frame in left side, the left rear side of bottom is connected with the guide rail in the frame inner wall, sliding type installs the gear box on the guide rail, a driving motor is installed on the right side of gear box, a driving motor's output shaft is connected on the connecting axle on gear box right side, all be connected with the blade on two left output shafts of gear box, two blade longitudinal symmetry, be equipped with adjustment mechanism on the first support frame in right side, the front side of frame is equipped with slide mechanism.

In a preferred embodiment of the invention, the adjusting mechanism comprises a first connecting block, a one-way screw rod, a one-way rod and a sliding plate, the front side and the rear side of the right first support frame are both connected with the first connecting block, the two first connecting blocks are symmetrical front and back, the one-way screw rod is rotatably penetrated through the front first connecting block, the one-way rod is penetrated through the rear first connecting block, the sliding plate is arranged between the one-way rod and the one-way screw rod, the sliding plate is in threaded fit with the one-way screw rod, and the sliding plate is in sliding fit with the one-way rod.

In a preferred embodiment of the invention, the sliding mechanism comprises second connecting blocks, a bidirectional screw rod, a second driving motor and a sliding frame, two second connecting blocks are connected to the front side of the frame, the two second connecting blocks are arranged in a bilateral symmetry manner, the bidirectional screw rod is rotatably penetrated between the two second connecting blocks, two sliding frames are connected to the bidirectional screw rod through threads, the two sliding frames are in bilateral symmetry, the two sliding frames are both in sliding fit with the frame, the second driving motor is installed on the right side of the front wall of the frame, and an output shaft of the second driving motor is connected to the right side of the bidirectional screw rod.

In a preferred embodiment of the present invention, the clamping mechanism further comprises a first fixing rod, a sliding block and a first return spring, the sliding block is movably penetrated through the left back side of the frame, the first fixing rod is connected to the left side of the back wall of the frame, the sliding block is in sliding fit with the first fixing rod, and the first return spring is connected between the sliding block and the first fixing rod.

In a preferred embodiment of the invention, the lifting mechanism further comprises a lifting mechanism, the lifting mechanism comprises a second reset spring, fixed blocks, supporting blocks, a pull rope, a second fixing rod, a wedge-shaped rod and a third reset spring, the second reset spring is connected between the gear box and the guide rail, the two fixed blocks are connected to the upper left side of the inner wall of the frame and are arranged in a bilateral symmetry manner, the supporting blocks are connected to the left side of the top in the left sliding frame, the pull rope is connected between the supporting blocks and the gear box and penetrates through the two fixed blocks in a sliding manner, the wedge-shaped rod penetrates through the left side of the guide rail and penetrates through the left wall of the guide rail, the second fixing rod is connected to the left side of the guide rail, the wedge-shaped rod is in sliding fit with the second fixing rod, the wedge-shaped rod is in clamping fit with the gear box, the third reset spring is connected between the wedge-shaped rod and the second fixing rod, and the third reset spring is sleeved on the second fixing rod.

In a preferred embodiment of the present invention, the marking mechanism further comprises a third fixing rod, a wedge plate and a fourth return spring, the third fixing rod is connected to the left wall of the left first supporting frame, the wedge plate is slidably connected to the third fixing rod, the fourth return spring is connected between the wedge plate and the third fixing rod, and the fourth return spring is sleeved on the third fixing rod.

In a preferred embodiment of the invention, the dust blowing device further comprises a dust blowing mechanism, wherein the dust blowing mechanism comprises a connecting frame and fans, the connecting frame is connected to the rear upper side of the inner wall of the frame, two fans are mounted on the connecting frame, and the two fans are symmetrical front and back.

In a preferred embodiment of the present invention, transparent glass is mounted on the front sides of both sliding frames.

The invention has the following beneficial effects: 1. through using second driving motor as drive power, can make two-way lead screw rotatory, under two-way lead screw and two sliding frame screw-thread fit's effect, two sliding frame move to the direction that is close to each other and close, and the spark that produces can be blocked by two sliding frame when the steel pipe cutting to this can effectually guarantee staff's personal safety.

2. The second driving motor is used as driving force, the two sliding frames can move towards the direction close to each other, the sliding block is downwards extruded by the sliding frame on the left side, then the sliding block downwards moves and clamps and fixes the steel pipe, and therefore displacement can be prevented when the steel pipe is cut, and the steel pipe can be prevented from moving randomly.

3. Through starting the fan, the wind that the fan blew out can be all blown the frame outside with the piece in the frame to drop subaerial, with this staff can need not to get into and clean in the frame, brought the facility for the staff.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial perspective view of the present invention.

Fig. 3 is a schematic perspective view of the adjusting mechanism of the present invention.

Fig. 4 is a schematic view of a first partial structure of the sliding mechanism of the present invention.

Fig. 5 is a schematic structural view of a second partial body of the sliding mechanism of the present invention.

Fig. 6 is a schematic partial perspective view of a first clamping mechanism of the present invention.

Fig. 7 is a schematic partial perspective view of a second clamping mechanism of the present invention.

Fig. 8 is a schematic partial perspective view of a first lifting mechanism of the present invention.

Fig. 9 is a schematic partial perspective view of a second lifting mechanism of the present invention.

Fig. 10 is a schematic view of a third partial perspective structure of the lifting mechanism of the present invention.

Fig. 11 is a schematic view of a fourth partial perspective structure of the lifting mechanism of the present invention.

Fig. 12 is a schematic partial perspective view of a fifth lifting mechanism of the present invention.

Fig. 13 is a schematic perspective view of a labeling mechanism according to the present invention.

Fig. 14 is a schematic perspective view of the dust blowing mechanism of the present invention.

The parts are labeled as follows: 1. the device comprises a frame, 2, a first support frame, 3, a second support frame, 4, a guide rail, 5, a gear box, 6, a first driving motor, 7, a blade, 8, an adjusting mechanism, 81, a first connecting block, 82, a one-way lead screw, 83, a one-way rod, 84, a sliding plate, 9, a sliding mechanism, 91, a second connecting block, 92, a two-way lead screw, 93, a second driving motor, 94, a sliding frame, 10, a clamping mechanism, 101, a first fixing rod, 102, a sliding block, 103, a first return spring, 11, a lifting mechanism, 111, a second return spring, 112, a fixing block, 1121, a supporting block, 113, a pulling rope, 114, a second fixing rod, 115, a wedge rod, 116, a third return spring, 12, a marking mechanism, 121, a third fixing rod, 122, a wedge plate, 123, a fourth return spring, 13, a dust blowing mechanism, 131, a connecting frame, 132 and a fan.

Detailed Description

It is to be noted that, in the different described embodiments, identical components are provided with the same reference numerals or the same component names, wherein the disclosure contained throughout the description can be transferred in a meaningful manner to identical components having the same reference numerals or the same component names. The positional references selected in the description, for example, upper, lower, lateral, also refer to the directly described and illustrated figures and, when the position changes, are transferred to the new position in the sense of the word.

Detailed description of the preferred embodiment 1

An adjustable cutting device for preventing spark of building steel, please see fig. 1-5, comprising a frame 1, a first support frame 2, a second support frame 3, a guide rail 4, a gear box 5, a first driving motor 6, a blade 7, an adjusting mechanism 8 and a sliding mechanism 9, wherein the inner bottom of the frame 1 is connected with the two first support frames 2 through bolts, the two first support frames 2 are arranged in a bilateral symmetry manner, the left side of the inner bottom of the frame 1 is connected with the second support frame 3 through bolts, the second support frame 3 is positioned at the left side of the first support frame 2 at the left side, the left rear side of the inner bottom of the inner wall of the frame 1 is connected with the guide rail 4 through bolts, the gear box 5 is slidably installed on the guide rail 4, the first driving motor 6 is installed at the right side of the gear box 5, an output shaft of the first driving motor 6 is connected on a connecting shaft at the right side of the gear box 5, the two output shafts at the left side of the gear box 5 are both connected with the blade 7, the two blades 7 are symmetrical front and back, the blade 7 is made of diamond, the adjusting mechanism 8 is arranged on the first support frame 2 at the right side, the front side of the frame 1, the first driving motor 6, the gear box drives the two blades 7 to cut a steel pipe through the two output shafts, and the steel pipe to cut off the steel pipe.

Referring to fig. 1 and 3, the adjusting mechanism 8 includes first connecting blocks 81, one-way screws 82, one-way rods 83 and sliding plates 84, the front and rear sides of the right first support frame 2 are connected with the first connecting blocks 81 by welding, the two first connecting blocks 81 are symmetrical front and back, the one-way screws 82 are rotatably penetrated on the front first connecting blocks 81, the one-way rods 83 are penetrated on the rear first connecting blocks 81, the sliding plates 84 are arranged between the one-way rods 83 and the one-way screws 82, the sliding plates 84 are in threaded fit with the one-way screws 82, the sliding plates 84 are in sliding fit with the one-way rods 83, and by rotating the one-way screws 82, the sliding plates 84 can push the steel pipes to move leftward together under the action of the threaded fit of the one-way screws 82 and the sliding plates 84, so as to adjust the cutting length of the steel pipes.

Referring to fig. 1, 4 and 5, the sliding mechanism 9 includes two second connecting blocks 91, a bidirectional screw 92, a second driving motor 93 and a sliding frame 94, the two second connecting blocks 91 are connected to the front side of the frame 1 by welding, the two second connecting blocks 91 are arranged in bilateral symmetry, the bidirectional screw 92 penetrates between the two second connecting blocks 91 in a rotating manner, the two sliding frames 94 are connected to the bidirectional screw 92 by threads, the two sliding frames 94 are arranged in bilateral symmetry, the two sliding frames 94 are both in sliding fit with the frame 1, transparent glass is arranged on the front sides of the two sliding frames 94, so that a worker can see the cutting condition of the internal steel pipe through the transparent glass, the second driving motor 93 is arranged on the right side of the front wall of the frame 1, an output shaft of the second driving motor 93 is connected to the right side of the bidirectional screw 92, the second driving motor 93 is started, an output shaft of the second driving motor 93 drives the bidirectional screw 92 to rotate, and the two sliding frames 94 are driven by the bidirectional screw 92 to move in a direction approaching each other, so that sparks generated by the cut steel pipe cannot be splashed freely by the two sliding frames 94.

Firstly, under the action of gravity, the gear box 5 drives the first driving motor 6 and the two blades 7 on the gear box to move downwards, when the two blades 7 touch the inner bottom of the frame 1, the gear box 5 stops moving downwards, then a worker pulls the gear box 5 upwards, the gear box 5 drives the first driving motor 6 and the two blades 7 to move upwards along with the gear box, then the steel pipe is placed between the first support frame 2 and the second support frame 3, and the right end of the steel pipe is in contact with the sliding plate 84, then the worker rotates the one-way lead screw 82, the one-way lead screw 82 rotates to drive the sliding plate 84 to move leftwards and push the steel pipe to move leftwards, at the moment, the distance between the blade 7 and the left end of the steel pipe is the length of the cut steel pipe, when the steel pipe is pushed leftwards to a proper distance, the one-way lead screw 82 stops rotating, the first driving motor 6 is started, the output shaft of the first driving motor 6 drives the two blades 7 to rotate through the gear box 5, then the second driving motor 93 is started, the output shaft of the second driving motor 93 drives the two-way lead screw 92 to rotate, then the two sliding frames 94 are driven to move towards each other, when the two sliding frames 94, the two sliding frames 94 are closed, the two sliding frames 94, the two sliding frames 7 are closed, the two sliding frames 94 are closed, the two sliding frames 94 are simultaneously, the two sliding frames 7 and the steel pipe 5, simultaneously, the piece that the steel pipe cutting produced can drop inside frame 1, after that, after two blades 7 are about to contact with the interior bottom of frame 1, close first driving motor 6, two blades 7 stop rotating along with it, then after two blades 7 touched the interior bottom of frame 1, but gear box 5 stopped to move down, at this moment the steel pipe cutting is finished, start second driving motor 93 reversal after it, the output shaft of second driving motor 93 drives two-way lead screw 92 counter-rotation, two-way lead screw 92 drives two sliding frame 94 and removes to the direction of keeping away from each other afterwards, make two sliding frame 94 open, then will cut the steel pipe that the completion take out can, with this can cut the steel pipe.

Detailed description of the preferred embodiment 2

On the basis of the specific embodiment 1, please see fig. 1 and fig. 6, further comprising a clamping mechanism 10, wherein the clamping mechanism 10 comprises a first fixing rod 101, a sliding block 102 and a first return spring 103, the sliding block 102 penetrates through the left rear side of the frame 1 in a sliding manner, the first fixing rod 101 is connected to the left side of the rear wall of the frame 1 through a bolt, the sliding block 102 is in sliding fit with the first fixing rod 101, and the first return spring 103 is connected between the sliding block 102 and the first fixing rod 101.

When the two sliding frames 94 move towards the direction approaching each other, the left sliding frame 94 will contact with the sliding block 102, so that the sliding block 102 will be pressed downwards by the left sliding frame 94, the first return spring 103 compresses, and then in the process of moving downwards of the sliding block 102, the sliding block 102 will contact with the steel pipe on the second support frame 3, so as to clamp and fix the steel pipe, thereby preventing the steel pipe from being displaced and moving randomly when the steel pipe is cut, when the two sliding frames 94 move towards the direction away from each other and open, the left sliding frame 94 will not press the sliding block 102 any more, under the reset action of the first return spring 103, the first return spring 103 will drive the sliding block 102 to move upwards and reset, and the sliding block 102 will release the steel pipe accordingly.

Detailed description of preferred embodiments 3

On the basis of embodiment 2, please see fig. 1, fig. 8, fig. 9, fig. 10, fig. 11 and fig. 12, further including a lifting mechanism 11, where the lifting mechanism 11 includes a second return spring 111, fixing blocks 112, supporting blocks 1121, a pulling rope 113, a second fixing rod 114, a wedge-shaped rod 115 and a third return spring 116, the second return spring 111 is connected between the gear box 5 and the guide rail 4, the left upper side of the inner wall of the frame 1 is connected with the two fixing blocks 112, the two fixing blocks 112 are arranged in bilateral symmetry, the left side of the top portion in the left side sliding frame 94 is connected with the supporting block 1121, the pulling rope 113 is connected between the supporting block 1121 and the gear box 5, the pulling rope 113 slidably penetrates through the two fixing blocks 112, the wedge-shaped rod 115 slidably penetrates through the left upper side of the guide rail 4, the left side of the guide rail 4 is connected with the second fixing rod 114 by welding, the wedge-shaped rod 115 is slidably matched with the second fixing rod 114, the wedge-shaped rod 115 is engaged with the gear box 5, the third return spring 116 is sleeved on the second fixing rod 114.

Initially, the second return spring 111 is in a stretched state, while the pulling rope 113 is in a tightened state, when the two sliding frames 94 move toward each other, the left sliding frame 94 will drive the pulling rope 113 to move rightward, so that the pulling rope 113 becomes slack, while the sliding block 102 will press the wedge rod 115 leftward after moving downward, the third return spring 116 compresses, the wedge rod 115 will then disengage from the gear box 5, so that the second return spring 111 will reset and drive the gear box 5 downward, the gear box 5 will drive the first driving motor 6 and the two blades 7 thereon downward, and then the two blades 7 will cut off the steel pipe, when the two sliding frames 94 move away from each other, the left sliding frame 94 will pull the gear box 5 upward through the pulling rope 113, the second return spring 111 will stretch, then the gear box 5 will drive the first driving motor 6 and the two blades 7 thereon to move upward, while the sliding block 102 will move upward and will not press the wedge rod 115 to move leftward, so that the third return spring 116 will drive the wedge rod 115 to move upward and press the wedge rod 115 will not move downward, so that the wedge rod 115 will press the wedge rod 115 and then move upward, so that the wedge rod 115 will press the gear box 5 and the wedge rod 115 will move upward, and then press the third return the wedge rod 115 will move upward, so that the wedge rod 115 will press the gear box 5, and then move upward.

Detailed description of preferred embodiments 4

On the basis of embodiment 3, please see fig. 1 and 13, the labeling mechanism 12 further includes a third fixing rod 121, a wedge plate 122 and a fourth return spring 123, the labeling mechanism 12 includes the third fixing rod 121, the wedge plate 122 and the fourth return spring 123, the left wall of the left first supporting frame 2 is connected with the third fixing rod 121 by welding, the wedge plate 122 is connected on the third fixing rod 121 in a sliding manner, the wedge plate 122 is made of titanium alloy, the fourth return spring 123 is connected between the wedge plate 122 and the third fixing rod 121, and the fourth return spring 123 is sleeved on the third fixing rod 121.

When the sliding plate 84 pushes the steel pipe to the left, the distance between the wedge plate 122 and the left end of the steel pipe is the length of the steel pipe to be cut, so that the worker can cut the steel pipe to a fixed length, after the two blades 7 move downwards to cut the steel pipe, the two blades 7 can contact with the wedge plate 122 in the process that the two blades 7 move downwards, and due to the fact that the wedge plate 122 is made of titanium alloy, the two blades 7 cannot cut the wedge plate 122, so that the two blades 7 can extrude the wedge plate 122 to the right, the fourth return spring 123 stretches, and after the two blades 7 move upwards, the two blades 7 can be disengaged from the wedge plate 122 in the process that the two blades 7 move upwards, so that the fourth return spring 123 resets, and the fourth return spring 123 drives the wedge plate 122 to move leftwards to reset.

Best mode for carrying out the invention

On the basis of embodiment 4, please see fig. 1 and 14, the dust blowing device 13 further includes a connecting frame 131 and a fan 132, the connecting frame 131 is connected to the rear upper side of the inner wall of the frame 1 by bolts, two fans 132 are installed on the connecting frame 131, the two fans 132 are symmetrical front and back, and when the fans 132 are started, the fans 132 can blow the debris in the frame 1 to the outside of the frame 1.

After the two sliding frames 94 are moved away from each other and opened, the fan 132 can be turned on, the air blown by the fan 132 can blow all the debris in the frame 1 to the outside of the frame 1, so that the debris can fall on the ground, after the debris is blown out to the outside of the frame 1, the fan 132 is turned off, and then the worker cleans the debris on the ground, so that all the debris in the frame 1 can be blown out, and the worker can not enter the frame 1 to clean.

The present application is described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, which are only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An adjustable cutting device for fire prevention of building steel comprises a frame (1), first support frames (2), second support frames (3), guide rails (4), a gear box (5), a first driving motor (6) and blades (7), wherein the inner bottom of the frame (1) is connected with the two first support frames (2) for supporting steel pipes, the two first support frames (2) are arranged in a bilateral symmetry manner, the left side of the inner bottom of the frame (1) is connected with the second support frame (3), the second support frame (3) is positioned at the left side of the left first support frame (2), the left rear side of the inner bottom of the inner wall of the frame (1) is connected with the guide rails (4), the gear box (5) is slidably arranged on the guide rails (4), the right side of the gear box (5) is provided with the first driving motor (6), output shafts of the first driving motor (6) are connected to the right side of the gear box (5), the blades (7) for cutting the steel pipes are connected to two output shafts at the left side of the gear box (5), and the two blades (7) are symmetrical front and back, the device is characterized by also comprising an adjusting mechanism (8) and a sliding mechanism (9), wherein the adjusting mechanism (8) for adjusting the cutting length of the steel pipe is arranged on the first support frame (2) on the right side, and the sliding mechanism (9) for protecting sparks is arranged on the front side of the frame (1); the adjusting mechanism (8) comprises a first connecting block (81), a one-way screw rod (82), a one-way rod (83) and a sliding plate (84), the front side and the rear side of the right first support frame (2) are respectively connected with the first connecting block (81), the two first connecting blocks (81) are symmetrical front and back, the one-way screw rod (82) penetrates through the front first connecting block (81) in a rotating mode, the one-way rod (83) penetrates through the rear first connecting block (81), the sliding plate (84) used for pushing the steel pipe is arranged between the one-way rod (83) and the one-way screw rod (82), the sliding plate (84) is in threaded fit with the one-way screw rod (82), and the sliding plate (84) is in sliding fit with the one-way rod (83); the sliding mechanism (9) comprises second connecting blocks (91), a two-way screw rod (92), a second driving motor (93) and sliding frames (94), the front side of the frame (1) is connected with the two second connecting blocks (91), the two second connecting blocks (91) are arranged in a bilateral symmetry mode, the two-way screw rod (92) penetrates through the two second connecting blocks (91) in a rotating mode, the two sliding frames (94) used for preventing sparks from splashing are connected to the two-way screw rod (92) through threads, the two sliding frames (94) are in bilateral symmetry, the two sliding frames (94) are in sliding fit with the frame (1), the second driving motor (93) is installed on the right side of the front wall of the frame (1), and an output shaft of the second driving motor (93) is connected to the right side of the two-way screw rod (92); the steel pipe clamping device is characterized by further comprising a clamping mechanism (10) used for fixing the steel pipe, wherein the clamping mechanism (10) comprises a first fixing rod (101), a sliding block (102) and a first reset spring (103), the sliding block (102) used for clamping the steel pipe penetrates through the left rear side of the frame (1) in a sliding mode, the first fixing rod (101) is connected to the left side of the rear wall of the frame (1), the sliding block (102) is in sliding fit with the first fixing rod (101), and the first reset spring (103) is connected between the sliding block (102) and the first fixing rod (101); also comprises a lifting mechanism (11), the lifting mechanism (11) comprises a second return spring (111), a fixed block (112) and a supporting block (1121), stay cord (113), second dead lever (114), wedge pole (115) and third reset spring (116), be connected with second reset spring (111) between gear box (5) and guide rail (4), the upper left side of frame (1) inner wall is connected with two fixed blocks (112), two fixed blocks (112) are bilateral symmetry formula setting, the left side at top is connected with supporting shoe (1121) in left side slip frame (94), be connected with stay cord (113) that are used for stimulateeing gear box (5) between supporting shoe (1121) and gear box (5), two fixed blocks (112) are run through to stay cord (113) slidingtype, the upper left side slidingtype of guide rail (4) is run through has wedge pole (115), wedge pole (115) runs through the left wall of guide rail (4), the left side of guide rail (4) is connected with second dead lever (114), wedge pole (115) and second dead lever (114) sliding fit, wedge pole (115) and gear box (5) joint cooperation, be connected with third reset spring (116) between wedge pole (115) and second dead lever (114), third reset spring (116) cover is on second dead lever (114).

2. An adjustable cutting device for fire protection of construction steel as claimed in claim 1 wherein: the steel pipe length measuring device is characterized by further comprising a marking mechanism (12) used for facilitating a worker to measure the length of a steel pipe, wherein the marking mechanism (12) comprises a third fixing rod (121), a wedge plate (122) and a fourth reset spring (123), the left wall of the first support frame (2) on the left side is connected with the third fixing rod (121), the third fixing rod (121) is connected with the wedge plate (122) in a sliding mode, the fourth reset spring (123) is connected between the wedge plate (122) and the third fixing rod (121), and the fourth reset spring (123) is sleeved on the third fixing rod (121).

3. An adjustable cutting device for fire protection of construction steel as claimed in claim 2 wherein: the dust blowing mechanism (13) is used for blowing away chips, the dust blowing mechanism (13) comprises a connecting frame (131) and fans (132), the connecting frame (131) is connected to the upper side of the rear portion of the inner wall of the frame (1), the two fans (132) are mounted on the connecting frame (131), and the two fans (132) are symmetrical in the front and back direction.

4. An adjustable cutting device for fire protection of construction steel as claimed in claim 3 wherein: transparent glass is arranged on the front sides of the two sliding frames (94).