CN110293522B

CN110293522B - Pipeline fire stopping collar back bolt fastening instrument for building

Info

Publication number: CN110293522B
Application number: CN201910673241.5A
Authority: CN
Inventors: 商卫; 李安才; 宋涛; 马元亮; 刘尚山
Original assignee: Jinan Second Construction Group Engineering Co ltd
Current assignee: Jinan Second Construction Group Engineering Co ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2021-01-12
Anticipated expiration: 2039-07-24
Also published as: CN110293522A

Abstract

The invention relates to the technical field of fastening tools, and discloses a bolt fastening tool for the back of a fire stopping ring of a pipeline for buildings, which comprises a main fixing tool body, a driving hydraulic block, a hydraulic rod, a driven hydraulic block, a driven gear and a main body handle, wherein the main fixing tool body comprises a main body shell, an upper operating block, a fixed table, a sliding groove, a rotating screw block, a rotating table and a fixing bolt, the main body shell is cuboid, the right surface of the main body shell is provided with a cuboid hole, the upper operating block comprises an upper operating block shell, a driving hydraulic groove, a driven hydraulic groove, a rotating hole, a rotating column and a tooth sliding groove, the upper operating block shell is cuboid, the rotating hole is a circular hole, the rotating hole is arranged at the rear end of the upper surface of the upper operating block shell, the main body handle is the same as the rectangular hole arranged on the right surface of the main body shell in size, the right, the hand holding hole is a rectangular hole. The aim of saving labor and using under various conditions is achieved.

Description

Pipeline fire stopping collar back bolt fastening instrument for building

Technical Field

The invention relates to the technical field of fastening tools, in particular to a fastening tool for a bolt on the back of a fire stopping ring of a pipeline for a building.

Background

With the rapid development of Chinese economy, construction heat and heat generation of house and land, the problems of exposed safety, environmental protection, energy and the like are increasingly prominent. Plastic pipes are widely used in various public and civil buildings, but plastic pipes are often easy to be used as passages for fire propagation, and holes formed after the plastic pipes are burnt out in case of hot fire are like a chimney, so that flame and smoke can spread and diffuse from one layer to another layer along the pipes or from one room to another room, and the fire loss is enlarged. The fire control organization of all countries in the world draws a consistent conclusion, the plastic pipeline is the chief culprit of fire hazard road spreading and diffusion, the fire-retardant ring is made of metal material, the fire-retardant expansion core material is filled in the shell, the shell is sleeved on the outer wall of the hard polyvinyl chloride pipeline and fixed on the floor or wall, when a fire hazard occurs, the core material is heated to expand rapidly, the UPVC pipeline is extruded, the pipeline penetrating opening is plugged in a short time, and the fire behavior is prevented from spreading along the opening. The product runs through open installation or concealed installation and is fixed on the floor part or two sides of a wall body, the fire retardant effect is good, the fire-resistant time is long, the fireproof ring has the advantages of excellent fire resistance, moisture resistance and oxidation resistance, compact structure, attractive appearance, convenience in installation and the like, and when the fire retardant ring is installed, due to the fact that the installation position is not fixed, a plurality of conditions can be met when the bolt is screwed down.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a bolt fastening tool for the back of a fire stopping ring of a pipeline for a building, which has the advantages of labor saving, capability of being used under various conditions and the like, and solves the problems of labor saving and inconvenient use.

(II) technical scheme

In order to achieve the purpose of labor saving and use under various conditions, the invention provides the following technical scheme: a pipeline fire stopping collar back bolt fastening tool for building comprises a fixing tool main body, a driving hydraulic block, a hydraulic rod, a driven hydraulic block, a driven gear and a main body handle, wherein the fixing tool main body comprises a main body shell, an upper operating block, a fixed platform, a sliding groove, a rotating screw block, a rotating platform and a fixing bolt, the upper operating block is arranged above the main body shell, the driven hydraulic groove is formed in the middle of the left side of the upper operating block shell and the left side of the driving hydraulic groove, a rectangular hole is formed in the right surface of the main body shell, the upper operating block comprises an upper operating block shell, the driving hydraulic groove, a driven hydraulic groove, a first rotating hole, a rotating column and a tooth sliding groove, the upper operating block shell is positioned at the left end of the upper surface of the main body shell, the lower surface of the upper operating block shell is fixedly connected with the upper surface of the main body shell, the driving hydraulic groove, the gear sliding groove is formed in the shell of the upper operation block and the left end of the driven hydraulic groove, the first rotating hole is formed in the rear end of the upper surface of the shell of the upper operation block, the rear end of the first rotating hole is overlapped with the front end of the gear sliding groove, the rotating column is located in the first rotating hole, the lower surface of the rotating column is fixedly connected with the inner lower surface of the first rotating hole, the fixed table is fixed at the front end of the left surface of the shell of the main body, the sliding groove is formed in the middle of the left surface of the shell of the main body, the rotating screw block is located on the lower surface of the shell of the main body, the rotating screw block can drive the sliding table to slide back and forth in the sliding groove, the two rotating tables are located at the front end of the right;

the middle part of the left surface of the driving hydraulic block is provided with a cuboid hole, the hydraulic rotating platform is positioned at the middle part in the cuboid of the driving hydraulic block, the hydraulic rod comprises a hydraulic rod shell, a rotating hole II, a rod rotating platform, a sliding rod and a rod fixing bolt, the hydraulic rotating platform penetrates through the rotating hole II, the hydraulic rod is movably connected with the driving hydraulic block, the sliding rod penetrates through the hydraulic rod shell, the rotating hole II is arranged at the middle part of the front end of the upper surface of the hydraulic rod shell, the upper surface of the sliding rod is provided with a circular threaded hole, the rod fixing bolt is in threaded connection with the sliding rod, the driven hydraulic block comprises a driven hydraulic plate and a flat toothed plate inserted into a toothed sliding groove, the front surface of the flat toothed plate is protruded with flat teeth, the driven hydraulic plate is inserted into a driven hydraulic groove, the hydraulic rod penetrates through the rotating platform and the circular hole arranged on the rod rotating platform through the bolt, so that the hydraulic rod is, the driven hydraulic block is movably connected with the fixed tool main body;

driven hydraulic plate, driven hydraulic groove, the injection of initiative hydraulic block and initiative hydraulic groove has hydraulic oil, it is the same groove of three bolt top shape to rotate the groove, three groove specification increases progressively and coincides, the minimum groove of specification is located the middle part, and the groove depth reduces one centimetre along with the specification increase, the main part handle is the size the same with the rectangular hole size that main part shell right side surface was seted up, the main part has been seted up the upper surface right-hand member and has been held the hole, go up be provided with driven gear on the operation piece, driven gear includes the gear main part, accept piece and rotor plate, gear main part upper surface with accept a fixed surface connection, the rotor plate includes rotor plate shell and rotation groove, the rotor plate shell is circular block, rotor plate shell lower surface and rotor plate upper surface fixed connection.

Preferably, the length of the driven hydraulic groove is twice that of the driving hydraulic groove, the width of the driven hydraulic groove is half that of the driving hydraulic groove, the driving hydraulic block is a cuboid block with the same size as the driving hydraulic groove, the driven hydraulic groove is a rectangular groove, and the tooth sliding groove is a cuboid groove with the width larger than the width of the driven hydraulic groove by two centimeters.

Preferably, the hydraulic stem shell is the cuboid, rotates the circular port that hole two is the size and rotates the platform size the same with hydraulic pressure, and the pole rotates the platform and is the hollow cylinder block that the size is the same with the rotation platform size, and the pole rotates the platform height and rotates between the platform apart from the samely two.

Preferably, the driven hydraulic plate is a rectangular plate with the same size as the driven hydraulic groove, and the flat toothed plate is a rectangular plate with the same size as the driven hydraulic plate.

Preferably, the gear body is a circular gear, and the bearing block is a cylinder.

Preferably, the lower surface of the gear body is provided with a circular hole with the same size as the rotary column, and the rotary column is inserted into the circular hole on the lower surface of the gear body.

Preferably, the hand holding hole is a rectangular hole, the sliding rod is a hollow rectangular rod, and the rotating platform is a hollow cylinder which penetrates through the rotating platform from top to bottom.

(III) advantageous effects

Compared with the prior art, the invention provides a building pipeline fire stopping ring back bolt fastening tool, which has the following beneficial effects:

1. this pipeline fire stopping collar back bolt-up instrument for building can pull out right through setting up the main part handle, screws up fixing bolt again, is fixed with the main part handle and fixing tool main part to this realizes increase moment, conveniently screws up the bolt.

2. This pipeline fire stopping collar back bolt-up instrument for building moves hydraulic stem through the pressure and promotes initiative hydraulic block and slide in initiative hydraulic pressure inslot, and the top moves driven hydraulic block left through hydraulic oil, and the flat rack area moves driven gear and rotates to this screws up the bolt, realizes when the pipeline fire stopping collar is located narrow and small space, also can conveniently screw up the bolt.

3. This pipeline fire stopping collar back bolt-up instrument for building, driven hydraulic pressure groove length is twice of initiative hydraulic pressure groove length, and driven hydraulic pressure groove width is half of initiative hydraulic pressure groove width, and driven hydraulic pressure piece migration distance is initiative hydraulic pressure piece promotion distance twice, realizes screwing up the bolt effect fast.

4. This pipeline fire stopping collar back bolt-up instrument for building through tensile slide bar, increases hydraulic stem moment, realizes laborsaving effect.

5. This pipeline fire stopping collar back bolt-up instrument for building through unscrewing fixing bolt, pulls out the main part handle right, screws up fixing bolt again, fixes the main part handle and fixing tool main part to this realizes increase moment, conveniently screws up the effect of bolt.

6. This pipeline fire stopping collar back bolt-up instrument for building rotates the groove through setting up and is the same groove of three bolt top shape, and three groove specification increases progressively and coincides, and the minimum groove of specification is located the middle part, and the groove depth degree reduces along with the specification increase, realizes the multiple bolt of adaptation.

7. This pipeline fire stopping collar back bolt-up instrument for building through adjusting distance between slip table and the fixed station, inserts in needing the bolt, rotates the main part handle, realizes can screwing up different specification bolts.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic diagram of the right-view structure of the present invention;

FIG. 3 is a schematic left-view structural diagram of the present invention;

FIG. 4 is a schematic cross-sectional view of a fastening tool body according to the present invention;

FIG. 5 is a schematic diagram of the active hydraulic block of the present invention;

FIG. 6 is a schematic view of the hydraulic ram of the present invention;

FIG. 7 is a schematic diagram of the slave hydraulic block of the present invention;

fig. 8 is a schematic view of the driven gear of the present invention.

In the figure: the tool comprises a fixed tool body 1, a body shell 11, an upper operation block 12, an upper operation block shell 121, a driving hydraulic groove 122, a driven hydraulic groove 123, a first rotating hole 124, a rotating column 125, a sliding groove 126, a fixed table 13, a sliding table 14, a sliding groove 15, a rotating screw block 16, a rotating table 17, a fixing bolt 18, a driving hydraulic block 2, a hydraulic rotating table 21, a hydraulic rod 3, a hydraulic rod shell 31, a second rotating hole 32, a rotating table 33, a sliding rod 34, a fixing bolt 35, a driven hydraulic block 4, a driven hydraulic plate 41, a toothed plate 42, a driven gear 5, a gear body 51, a bearing block 52, a rotating plate 53, a rotating plate shell 531, a rotating groove 532, a handle 6 and a hand-holding hole 61.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a pipe fire stop ring back bolt fastening tool for building, the device includes a fixing tool body 1, a driving hydraulic block 2, a hydraulic rod 3, a driven hydraulic block 4, a driven gear 5 and a body handle 6, the fixing tool body 1 includes a body housing 11, an upper operating block 12, a fixed table 13, a sliding table 14, a sliding groove 15, a rotating screw block 16, a rotating table 17 and a fixing bolt 18, the body housing 11 is a cuboid, a cuboid hole is opened on the right surface of the body housing 11, the upper operating block 12 includes an upper operating block housing 121, a driving hydraulic groove 122, a driven hydraulic groove 123, a rotating hole 124, a rotating column 125 and a tooth sliding groove 126, the upper operating block housing 121 is a cuboid, the upper operating block housing 121 is located on the left end of the upper surface of the body housing 11, the lower surface of the upper operating block housing 121 is fixedly connected with the upper surface of the body housing 11, the driving hydraulic groove 122 is a long groove, the driving hydraulic groove 122 is arranged at the rear end of the right surface of the upper operating block shell 121, the driven hydraulic groove 123 is a rectangular groove, the driven hydraulic groove 123 is arranged in the upper operating block shell 121 and in the middle of the left side of the driving hydraulic groove 122, the length of the driven hydraulic groove 123 is twice that of the driving hydraulic groove 122, the width of the driven hydraulic groove 123 is half that of the driving hydraulic groove 122, the tooth sliding groove 126 is a rectangular groove with a width two centimeters larger than that of the driven hydraulic groove 123, the tooth sliding groove 126 is arranged in the upper operating block shell 121 and at the left end of the driven hydraulic groove 123, the first rotating hole 124 is a circular hole, the first rotating hole 124 is arranged at the rear end of the upper surface of the upper operating block shell 121, the rear end of the first rotating hole 124 is overlapped with the front end of the tooth sliding groove 126, the rotating column 125 is a cylinder, the rotating column 125 is arranged in the first rotating hole 124, the lower surface of the rotating column 125 is fixedly connected with the inner lower surface of the first rotating hole 124, the fixing table, the sliding groove 15 is arranged in the middle of the left surface of the main body shell 11, the rotating screw block 16 is arranged on the lower surface of the main body shell 11, the sliding table 14 is arranged in the sliding groove 15, the sliding table 14 is movably connected with the main body shell 11, the rotating screw block 16 can drive the sliding table 14 to slide back and forth in the sliding groove 15, the rotating table 17 is a hollow cylinder which penetrates up and down, the two rotating tables 17 are arranged at the front end of the right surface of the upper operating block shell 121 and are distributed up and down symmetrically, the side surface of the rotating table 17 is fixedly connected with the right surface of the upper operating block shell 121, the active hydraulic block 2 is a cuboid block with the same size as the active hydraulic groove 122, the middle of the left surface of the active hydraulic block 2 is provided with a cuboid hole, the hydraulic rotating table 21 is arranged in the middle of the cuboid of the active hydraulic block 2, the hydraulic rotating table 21 is a cylinder, the hydraulic rod 3 comprises a hydraulic rod shell 31, the hydraulic rod shell 31 is a cuboid, the second rotating hole 32 is a circular hole with the same size as the hydraulic rotating platform 21, the second rotating hole 32 is formed in the middle of the front end of the upper surface of the hydraulic rod shell 31, the rod rotating platform 33 is a hollow cylindrical block with the same size as the rotating platform 17, the height of the rod rotating platform 33 is the same as the distance between the two rotating platforms 17, the hydraulic rod 3 is movably connected with the fixing tool main body 1 by penetrating through the rotating platforms 17 and the circular holes formed in the rod rotating platform 33 through bolts, the driven hydraulic block 4 is inserted into the driving hydraulic groove 122, the driven hydraulic block 4 is movably connected with the fixing tool main body 1, the hydraulic rotating platform 21 penetrates through the second rotating hole 32, the hydraulic rod 3 is movably connected with the driving hydraulic block 2, the sliding rod 34 is a hollow rectangular rod, the sliding rod 34 penetrates through the hydraulic rod shell 31, the upper surface of the sliding rod 34 is provided with a circular threaded hole, and the rod fixing bolt 35 is in threaded, the driven hydraulic block 4 comprises a driven hydraulic plate 41 and a flat toothed plate 42, the driven hydraulic plate 41 is a rectangular plate with the size same as that of the driven hydraulic groove 123, the flat toothed plate 42 is a rectangular plate with the size same as that of the driven hydraulic plate 41, flat teeth protrude from the front surface of the flat toothed plate 42, the driven hydraulic plate 41 is inserted into the driven hydraulic groove 123, the flat toothed plate 42 is inserted into the tooth sliding groove 126, hydraulic oil is injected into the driven hydraulic plate 41, the driven hydraulic groove 123, the driving hydraulic block 2 and the driving hydraulic groove 122, the driven gear 5 comprises a gear body 51, a bearing block 52 and a rotating plate 53, the gear body 51 is a circular gear, the bearing block 52 is a cylinder, the upper surface of the gear body 51 is fixedly connected with the lower surface of the bearing block 52, the lower surface of the gear body 51 is provided with a circular hole with the size same as that of the rotating column 125, the rotating column 125 is inserted into the circular hole on the lower surface of the, driven gear 5 and fixed tool main part 1 swing joint, gear main part 51 and the meshing of dull and stereotyped pinion rack 42, rotor plate 53 include rotor plate shell 531 and rotation groove 532, and rotor plate shell 531 is the circular block, and rotor plate shell 531 lower surface is connected with rotor plate 53 upper surface fixed, rotates groove 532 and is the same groove of three bolt top shape, three groove rule increases progressively and coincides, and the minimum groove of specification is located the middle part, and the groove depth degree reduces along with the specification increase, and main part handle 6 is the rectangle hole size of seting up for size and main part shell 11 right side surface the same, and main part handle 6 upper surface right-hand member has been seted up and has been held hole 61, holds hole 61 and be the rectangle hole.

When the fixing device is used, in the first step, the distance between the sliding table 14 and the fixing table 13 is adjusted, the fixing device is inserted into a bolt to be fixed, the main body handle 6 is rotated, and the bolt is tightened.

And secondly, loosening the fixing bolt 18, pulling out the main body handle 6 rightwards, tightening the fixing bolt 18, and fixing the main body handle 6 and the fixing tool main body 1, so that the effects of increasing the torque and conveniently tightening the bolt are achieved.

And thirdly, when the fire stopping collar of the pipeline is located in a narrow space and the main handle 6 is turned to be difficult to realize, the turning groove 532 and the bolt are clamped, the driving hydraulic rod 3 is pressed to push the driving hydraulic block 2 to slide in the driving hydraulic groove 122, the driven hydraulic block 4 is pushed leftwards through hydraulic oil, and the flat toothed plate 42 drives the driven gear 5 to rotate so as to tighten the bolt.

Claims

1. The utility model provides a pipeline fire stopping collar back bolt-up instrument for building, includes fixing tool main part (1), initiative hydraulic block (2), hydraulic stem (3), driven hydraulic block (4), driven gear (5) and main part handle (6), its characterized in that: the fixing tool main body (1) comprises a main body shell (11), an upper operating block (12), a fixed table (13), a sliding table (14), a sliding groove (15), a rotating screw block (16), a rotating table (17) and a fixing bolt (18), wherein the upper operating block (12) is arranged above the main body shell (11), a driven hydraulic groove (123) is formed in the upper operating block shell (121) and in the middle of the left side of the driving hydraulic groove (122), a rectangular hole is formed in the right surface of the main body shell (11), the upper operating block (12) comprises an upper operating block shell (121), a driving hydraulic groove (122), a driven hydraulic groove (123), a first rotating hole (124), a rotating column (125) and a tooth sliding groove (126), the upper operating block shell (121) is positioned at the left end of the upper surface of the main body shell (11), the lower surface of the upper operating block shell (121) is fixedly connected with the upper surface of the main body shell (11), the driving hydraulic groove (122) is arranged at the rear end of the right surface of the upper operation block shell (121), the tooth sliding groove (126) is arranged at the rear end of the upper surface of the upper operation block shell (121) and the left end of the driven hydraulic groove (123), the first rotating hole (124) is arranged at the rear end of the upper surface of the upper operation block shell (121), the rear end of the first rotating hole (124) is superposed with the front end of the tooth sliding groove (126), the rotating column (125) is positioned in the first rotating hole (124), the lower surface of the rotating column (125) is fixedly connected with the inner lower surface of the first rotating hole (124), the fixed platform (13) is fixed at the front end of the left surface of the main body shell (11), the sliding groove (15) is arranged in the middle part of the left surface of the main body shell (11), the rotating screw block (16) is positioned at the lower surface of the main body shell (11), the rotating screw block (16) can drive the sliding platform (14) to slide back and forth in the sliding groove (15) by rotation, and two rotating platforms (17, the side surface of the rotating table (17) is fixedly connected with the right surface of the upper operating block shell (121);

the middle part of the left surface of the driving hydraulic block (2) is provided with a cuboid hole, the hydraulic rotating platform (21) is positioned at the middle part in the cuboid of the driving hydraulic block (2), the hydraulic rod (3) comprises a hydraulic rod shell (31), a second rotating hole (32), a rod rotating platform (33), a sliding rod (34) and a rod fixing bolt (35), the hydraulic rotating platform (21) penetrates through the second rotating hole (32), the hydraulic rod (3) is movably connected with the driving hydraulic block (2), the sliding rod (34) penetrates through the hydraulic rod shell (31), the second rotating hole (32) is arranged in the middle part of the front end of the upper surface of the hydraulic rod shell (31), the upper surface of the sliding rod (34) is provided with a circular threaded hole, the rod fixing bolt (35) is in threaded connection with the sliding rod (34), the driven hydraulic block (4) comprises a driven hydraulic plate (41) and a flat toothed plate (42), the flat toothed plate (42) is inserted into the tooth sliding groove (126), the front surface of the flat toothed plate (42) is protruded with flat teeth, the driven hydraulic plate (41) is inserted into the driven hydraulic groove (123), and passes through round holes formed in the rotating table (17) and the rod rotating table (33) through bolts, so that the hydraulic rod (3) is movably connected with the fixed tool main body (1), the driven hydraulic block (4) is inserted into the driving hydraulic groove (122), and the driven hydraulic block (4) is movably connected with the fixed tool main body (1);

hydraulic oil is injected into the driven hydraulic plate (41), the driven hydraulic groove (123), the driving hydraulic block (2) and the driving hydraulic groove (122), the rotating groove (532) is a groove with three bolt tops of the same shape, the three groove specifications are increased in size and coincide, the minimum groove in the specification is positioned in the middle, the groove depth is reduced by one centimeter along with the increase of the specification, the size of a main body handle (6) is the same as that of a rectangular hole formed in the right surface of a main body shell (11), a hand-holding hole (61) is formed in the right end of the upper surface of the main body handle (6), a driven gear (5) is arranged on an upper operating block (12), the driven gear (5) comprises a gear main body (51), a bearing block (52) and a rotating plate (53), the upper surface of the gear main body (51) is fixedly connected with the lower surface of the bearing block (52), the rotating plate (53) comprises a rotating plate shell (531) and a rotating groove (532, the rotating plate shell (531) is a circular block, and the lower surface of the rotating plate shell (531) is fixedly connected with the upper surface of the rotating plate (53).

2. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: the length of the driven hydraulic groove (123) is twice that of the driving hydraulic groove (122), the width of the driven hydraulic groove (123) is half of that of the driving hydraulic groove (122), the driving hydraulic block (2) is a cuboid block with the same size as that of the driving hydraulic groove (122), the driven hydraulic groove (123) is a rectangular groove, and the tooth sliding groove (126) is a cuboid groove with the width larger than that of the driven hydraulic groove (123) by two centimeters.

3. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: hydraulic stem shell (31) are the cuboid, rotate hole two (32) for the size and rotate the circular port that platform (21) size is the same with hydraulic pressure, pole rotate platform (33) for the size with rotate the hollow cylinder block that platform (17) size is the same, pole rotate platform (33) height and two and rotate the distance between platform (17) the same.

4. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: the driven hydraulic plate (41) is a rectangular plate with the size same as that of the driven hydraulic groove (123), and the flat toothed plate (42) is a rectangular plate with the size same as that of the driven hydraulic plate (41).

5. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: the gear body (51) is a circular gear, and the bearing block (52) is a cylinder.

6. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: the lower surface of the gear body (51) is provided with a circular hole with the same size as the rotary column (125), and the rotary column (125) is inserted into the circular hole on the lower surface of the gear body (51).

7. The tool for fastening bolts at the back of firestop rings for construction pipelines as claimed in claim 1, wherein: the hand holding hole (61) is a rectangular hole, the sliding rod (34) is a hollow rectangular rod, and the rotating table (17) is a hollow cylinder which penetrates through the upper part and the lower part.