CN211564699U - Longitudinal cutting device of steel pipe - Google Patents

Abstract

The utility model discloses a vertical cutting device of steel pipe belongs to mechanical technical field. The device comprises a base, a first clamping external member, a second clamping external member, a connecting support external member and a workbench, wherein the base, the first clamping external member, the second clamping external member, the connecting support external member and the workbench are sequentially connected, a saw blade is arranged on the workbench, the device can accurately lock a cutting surface, longitudinal cutting of a steel pipe is achieved, and the device has the advantages of being low in manufacturing cost, good in use safety and high in cutting precision.

Description

Longitudinal cutting device of steel pipe

Technical Field

The utility model belongs to the technical field of machinery, a device that can carry out vertical cutting to the steel pipe is related to.

Background

The steel pipe can generate residual stress in the forming process or the heat treatment process, so that the ultimate use strength of the steel pipe is reduced to a certain degree, and the steel pipe can be broken under lower working strength after the residual stress is accumulated to a certain value, and the consequence is very serious; the residual stress of steel pipes is usually detected by the circular cutting method in engineering, and the steel pipes need to be longitudinally cut. The accuracy of the measurement result is directly affected by the cutting precision of the steel pipe, however, the design of the conventional steel pipe longitudinal cutting device is relatively complex, the manufacturing cost is relatively high, and sometimes the steel pipe longitudinal cutting device cannot cut along the radial direction of the steel pipe.

Disclosure of Invention

To one or more of the problem that exists among the prior art, the utility model provides a vertical cutting device of steel pipe, include:

the base comprises a bottom plate (4a) and a first side plate (4b) and a second side plate (4c) which are respectively arranged at two ends of the bottom plate (4 a);

the first clamping external member comprises two first clamping blocks (6) which are movably arranged on the bottom plate (4 a);

the second clamping external member comprises two second clamping blocks (3) which are movably arranged on the first clamping block (6);

the connecting bracket kit comprises two connecting brackets (1), wherein the two connecting brackets (1) are movably connected with the two second clamping blocks (3);

the two ends of the workbench (9) are connected with the two connecting supports (1), and a saw blade (10) is arranged on the workbench (9).

Two second grooves (401) which are parallel to each other are formed in the upper surface of the bottom plate (4a), and a first wheel (a16) matched with the second grooves (401) is arranged on the first clamping block (6); preferably, the first capture block (6) is provided with a third through groove (602) matched with the first wheel (a16), fifth through holes (603) are formed in two sides of the third through groove (602), the first wheel (a16) is arranged in the third through groove (602) through a first hinge (a8), and the first hinge (a8) penetrates through the fifth through holes (603); further preferably, the number of the first wheels (a16) is 4.

The first side plate (4b) is further provided with two second screw holes (402), a first screw rod (a5) is arranged in each second screw hole (402), and the first screw rod (a5) can be in contact with the first clamping block (6).

The upper surface of the first clamping block (6) is provided with two third grooves (601) which are parallel to each other, and a second wheel (b16) matched with the third grooves (601) is arranged on the second clamping block (3); preferably, the second capture block (3) is provided with a first groove (303) matched with the second wheel (b16), fourth through holes (304) are arranged on two sides of the first groove (303), the second wheel (b16) is arranged in the first groove (303) through a second hinge (b8), and the second hinge (b8) penetrates through the fourth through holes (304); further preferably, the number of the second wheels (b16) is 4.

The two connecting supports (1) are connected with the two second clamping blocks (3) through four connecting rods (2);

preferably, the both ends of second screens piece (3) are provided with second respectively and lead to groove (301), the upper and lower both sides that the second led to groove (301) are provided with third through-hole (302), correspondingly, the both ends of linking bridge (1) are provided with first logical groove (102) respectively, the upper and lower both sides that first logical groove (102) are provided with first through-hole (103), linking bridge (1) with second screens piece (3) are through using connecting rod (2) are connected respectively third through-hole (302) with first through-hole (103).

The connecting bracket (1) is of a cuboid structure, a first screw hole (101) is formed in the center of the connecting bracket (1), and a second screw (b5) is arranged in the first screw hole (101); and third screw holes (902) are correspondingly formed in two ends of the workbench (9), wherein the second screw (b5) penetrates through the first screw hole (101) and is connected with the third screw holes (902).

The workbench (9) is of a cuboid structure, and a sixth through hole (901) is formed in the upper surface of the workbench (9) and used for mounting the saw blade (10); preferably, the saw blade (10) is rotatably arranged on a bearing assembly, eighth through holes (905) are further arranged on two sides of the sixth through hole (901), and the bearing assembly is fixedly arranged on the workbench (9).

The bearing assembly comprises a bearing seat (11), a rolling bearing (15) and a shaft (12); the number of the bearing seats (11) is two, the bearing seats (11) are provided with cylindrical fourth grooves (1101), the rolling bearings (15) are arranged in the fourth grooves (1101), the axial line position of the fourth grooves (1101) is provided with tenth through holes (1102), the shaft (12) penetrates through the tenth through holes (1102) and the eighth through holes (905), the shaft (12) is provided with a clamping section (1201) and a shaft connecting section (1203), the saw blade (10) is fixedly arranged on the clamping section (1201) of the shaft (12), and the shaft connecting section (1203) is arranged in two rolling bearings (15) which are oppositely arranged;

preferably, the left side and the right side of the workbench (9) are respectively provided with a first outer edge (903), the first outer edge (903) is provided with a seventh through hole (904), correspondingly, the two ends of the bearing seat (11) are respectively provided with a second outer edge (1103), the second outer edge (1103) is provided with an eleventh through hole (1104), and the bearing seat (11) is fixedly connected with the workbench (9) through a third screw (c5) and a second nut (b 13).

The shaft (12) is further provided with a threaded section (1202), two ends of the saw blade (10) are respectively provided with a first nut (a13), and the first nut (a13) is screwed on the threaded section (1202).

The device also comprises a pad block (14) arranged between the first clamping block (6) and the second clamping block (3); preferably, the upper surface of the pad block (14) is provided with a fifth groove (1401) matched with the second wheel (b16), and the lower surface of the pad block (14) is provided with a boss (1402) matched with the third groove (601).

The utility model provides a antifriction bearing, wheel, hinge, screw rod and nut are the standard component, wheel, hinge, screw rod and nut under the prerequisite that does not influence its use efficiency, can change the proportional relation of structure or adjust the size of structure.

The longitudinal cutting device for the steel pipe, which is provided based on the technical scheme, can accurately lock the cutting surface, realizes longitudinal cutting of the steel pipe, and has the characteristics of low manufacturing cost, good use safety and high cutting precision. Compared with the prior art, the utility model discloses following beneficial effect has:

1) the device of the utility model uses common materials, has simple structure and is easy to process, therefore, the manufacturing cost of the device is relatively low;

2) the first clamping external member can directionally move on the bottom plate, the second clamping external member can directionally move on the first clamping external member or the cushion block, and the screw can fix the steel pipe, so that the device is relatively good in use safety;

3) the device adopts an axisymmetric structural design, the screwing depth of the screw rod in the screw hole of the connecting support is selected according to different outer diameter specifications of the steel pipe, the octagonal frame consisting of the second clamping external member, the connecting rod and the connecting support external member can vertically divide the steel pipe equally, and thus a cutting surface formed by the work of the saw blade can be ensured to pass through the axis of the steel pipe, and the cutting precision of the device is relatively high;

to sum up, through the utility model discloses the device can realize carrying out the purpose of vertical cutting to the steel pipe, has low in manufacturing cost, uses the characteristics that the security is good, cutting accuracy is high.

Drawings

FIG. 1 is a schematic top view of a longitudinal cutting device for steel pipes for cutting small-caliber steel pipes;

FIG. 2 is a schematic structural view of a longitudinal cutting device for a steel pipe in front view when cutting a small-diameter steel pipe;

FIG. 3 is a left side view structural diagram of the longitudinal cutting device for steel pipes when cutting small-caliber steel pipes;

FIG. 4 is a schematic top view of the longitudinal cutting device for steel pipes for cutting large-diameter steel pipes;

FIG. 5 is a schematic structural view of a longitudinal cutting device for steel pipes in a front view when cutting large-diameter steel pipes;

FIG. 6 is a left side view schematic structural view of the longitudinal steel pipe cutting device for cutting a large-diameter steel pipe;

FIG. 7 is a schematic top view of the assembled worktable, bearing seat, saw blade, shaft, rolling bearing, and guard nut of the longitudinal cutting device for steel pipes;

FIG. 8 is a schematic structural view of the assembled table, bearing seat, saw blade, shaft, rolling bearing, and guard nut of the longitudinal cutting device for steel pipes;

FIG. 9 is a left side view structural schematic diagram of the longitudinal steel pipe cutting device after assembling the workbench, the bearing seat, the saw blade, the shaft, the rolling bearing and the guard nut;

FIG. 10 is a front view of the first clamping block, the first cushion block and the first wheel of the longitudinal cutting device for steel pipes after being assembled;

FIG. 11 is a left side view schematic diagram of the assembled first clamping block, first cushion block and first wheel of the longitudinal steel pipe cutting device;

FIG. 12 is a schematic bottom view of the second engaging block and the second wheel of the longitudinal cutting device for steel pipes after assembly;

FIG. 13 is a left side view of the assembled second engaging block and second wheel of the longitudinal cutting device for steel pipes;

FIG. 14 is a front view of the assembled saw blade and shaft of the longitudinal steel pipe cutting apparatus;

FIG. 15 is a schematic top view of the table of the longitudinal cutting device for steel pipes;

FIG. 16 is a left side view schematically showing the structure of the table of the longitudinal cutting device for steel pipes;

FIG. 17 is a left side view schematically showing the construction of the bearing housing of the longitudinal cutting device for steel pipes;

FIG. 18 is a front view schematically showing the construction of the connecting bracket of the longitudinal cutting device for steel pipes;

FIG. 19 is a schematic top view of the connecting bracket of the longitudinal cutting device for steel pipes;

FIG. 20 is a left side view schematically showing the structure of a second screw of the longitudinal cutting device for steel pipes;

FIG. 21 is a left side view schematically showing the construction of a saw blade of the longitudinal cutting device for steel pipes;

FIG. 22 is a left side view of the longitudinal cutting device for steel pipes;

FIG. 23 is a schematic top view of a connecting rod of the longitudinal cutting device for steel pipes;

FIG. 24 is a schematic view of the longitudinal cutting device for steel pipes;

in the drawings, the reference numbers denote:

1: connecting a bracket; 101: a first screw hole; 102: a first through groove; 103: a first through hole; 2: a connecting rod; 201: a second through hole; 3: a second bit block; 301: a second through groove; 302: a third through hole; 303: a first groove; 304: a fourth via hole; 4 a: a base plate; 4 b: a first side plate; 4 c: a second side plate; 401: a second groove; 402: a second screw hole; a 5: a first screw; b 5: a second screw; c 5: a third screw; 501: a club head; 502: a rod body; 6: a first bit block; 601: a third groove; 602: a third through groove; 603: a fifth through hole; 7: a steel pipe; a 8: a first hinge; b 8: a second hinge; c 8: a third hinge; 9: a work table; 901: a sixth through hole; 902: a third screw hole; 903: a first outer edge; 904: a seventh via hole; 905: an eighth through hole; 10: a saw blade; 1001: a ninth via hole; 11: a bearing seat; 1101: a fourth groove; 1102: a tenth through hole; 1103: a second outer edge; 1104: an eleventh through hole; 12: a shaft; 1201: a card position section; 1202: a threaded segment; 1203: a shaft connecting section; a 13: a first nut; b 13: a second nut; 14: a cushion block; 1401: a fifth groove; 1402: a boss; 15: a rolling bearing; a 16: a first wheel; b 16: and a second wheel.

Detailed Description

The present invention will be described in detail with reference to the following embodiments.

The embodiments are implemented on the premise of the technical solution of the present invention, and given detailed implementation and specific operation processes, the embodiments will help understanding the present invention, but the scope of the present invention is not limited to the following embodiments.

Example 1:

fig. 1 to 3 show a longitudinal cutting device for a steel pipe provided by this embodiment, which includes a base including a bottom plate 4a and a first side plate 4b and a second side plate 4c respectively disposed at two ends of the bottom plate 4 a; the first clamping external member comprises two first clamping blocks 6 which are movably arranged on the bottom plate 4 a; the second clamping external member comprises two second clamping blocks 3, wherein the second clamping blocks 3 are movably arranged on the first clamping blocks 6; the connecting bracket assembly comprises two connecting brackets 1, wherein the two connecting brackets 1 and the two second clamping blocks 3 are alternately arranged, and the connecting brackets 1 are movably connected with the second clamping blocks 3; and the two ends of the workbench 9 are connected with the two connecting supports 1, and a saw blade 10 is arranged on the workbench 9.

As shown in fig. 1 to 3, the base is made of a metal material and is formed by sequentially and vertically connecting a first side plate 4b, a bottom plate 4a and a second side plate 4c which are equal in length; two second grooves 401 are symmetrically arranged on the upper surface of the bottom plate 4a arranged in the horizontal direction, the first side plate 4b and the second side plate 4c arranged in the vertical direction are respectively arranged at the left end and the right end of the bottom plate 4a, and the first side plate 4b is symmetrically provided with two second screw holes 402 with axes arranged in the horizontal direction for screwing the first screw rod a 5.

As shown in fig. 1, 10 and 11, the first clamping block 6 is made of a metal material and has a symmetrical structure like a rectangular parallelepiped, two third grooves 601 parallel to each other are symmetrically formed in the upper surface of the first clamping block 6, two third through grooves 602 parallel to each other are formed in the lower surface of the first clamping block, and two fifth through holes 603 are respectively formed in two sides of the third through grooves 602; the third through hole 602 is internally provided with a first wheel a16, the number of the first wheels a16 is four, and the first wheel a16 is assembled by a first hinge a8 arranged in the fifth through hole 603, so that the first catch block 6 can roll in the second groove 401 of the bottom plate 4a by the first wheel a 16; meanwhile, the two first screws a5 screwed into the second screw holes 402 of the first side plate 4b can push the first locking block 6 to move toward the center direction by screwing the first screws a5, so that the distance between the two first locking blocks 6 can be adjusted according to the outer diameter specification of the steel tube 7.

As shown in fig. 1, 12 and 13, the second clamping block 3 is made of a metal material and has a symmetrical structure like a rectangular parallelepiped, four first grooves 303 arranged in two rows and two columns are formed in the lower surface of the second clamping block 3, and fourth through holes 304 are formed in two sides of each first groove 303; the first groove 303 is internally provided with a second wheel b16 which is matched with the first groove 303, the number of the second wheels b16 is four, and the second wheel b16 is assembled through a second hinge b8 which is arranged in the fourth through hole 304, so that the second clamping block 3 can roll in the third groove 601 of the first clamping block 6 through the second wheel b 16; two ends of the second clamping block 3 are respectively provided with a second through groove 301, and the upper side and the lower side of the second through groove 301 are provided with third through holes 302 for movably connecting the connecting rod 2.

As shown in fig. 1 and 23, the connecting rod 2 is made of a metal material and has a symmetrical structure like a rectangular parallelepiped, two ends of the connecting rod 2 are respectively provided with a second through hole 201, a third hinge c8 is arranged in the second through hole 201, and the second clamping block 3 is movably connected with the connecting bracket 1 in a hinged manner through four connecting rods 2.

As shown in fig. 1, 18, 19 and 20, the connecting bracket 1 is made of a metal material and has a rectangular parallelepiped symmetrical structure, two ends of the connecting bracket 1 are respectively provided with a first through groove 102, upper and lower sides of the first through groove 102 are respectively provided with a first through hole 103, and a third hinge c8 is arranged in the first through hole 103; the center of the connecting bracket 1 is provided with a first screw hole 101, a second screw b5 matched with the first screw hole 101 is arranged in the first screw hole 101, the second screw b5 comprises a rod head 501 and a rod body 502, the rod head 501 is a cylindrical symmetrical structure, and the rod body 502 is a cylindrical symmetrical structure with threads arranged on the outer surface and used for positioning and screwing the workbench 9.

As shown in fig. 7, 8, 9, 15 and 16, the table 9 is made of a metal material and has a rectangular parallelepiped symmetrical structure; two ends of the workbench 9 are respectively provided with a third screw hole 902 for positioning and screwing the second screw b 5; a sixth through hole 901 is formed in the upper surface of the workbench 9 and used for installing the saw blade 10; eighth through holes 905 are respectively formed in two sides of the sixth through hole 901, first outer edges 903 are respectively formed in the left side and the right side of the workbench 9, seventh through holes 904 are formed in the first outer edges 903, and third screws c5 are arranged in the seventh through holes 904 and are used for being fixedly connected with the bearing assembly.

As shown in fig. 7, 8, 9, 15 and 17, the bearing assembly includes a bearing housing 11, a rolling bearing 15 and a shaft 12; the saw blade 10 is fixedly arranged on the clamping section 1201 of the shaft 12, and the shaft connecting section 1203 is arranged in two opposite rolling bearings 15; two ends of the bearing seat 11 are respectively provided with a second outer edge 1103, the second outer edge 1103 is provided with an eleventh through hole 1104, and the bearing seat 11 is fixedly connected with the workbench 9 through a third screw c5 and a second nut b 13.

Example 2:

the longitudinal cutting device for steel pipes provided by this embodiment is different from the device provided by embodiment 1 in that the longitudinal cutting device further comprises the pad block 14, as shown in fig. 4, 5, 6, 10 and 11, the pad block 14 is arranged between the first clamping block 6 and the second clamping block 3, and the upper surface of the pad block 14 is provided with a fifth groove 1401 matched with the second wheel b16 for rolling of the second wheel b 16; the lower surface of the pad block 14 is provided with a boss 1402 matched with the third groove 601 for clamping and fixing the pad block 14; thus, when the diameter of the steel pipe 7 to be longitudinally cut is large, the second locking member and the table 9 can be raised correspondingly by the positioning block 14, and the distance between the two first locking blocks 6 can be increased correspondingly by simultaneously screwing out the two first screws a5 arranged in the second screw hole 402 of the first side plate 4b, so that the steel pipe 7 can be placed in the device for cutting.

Taking the longitudinal steel pipe cutting device provided in embodiment 1 as an example, as shown in fig. 1 to 23, first, a first wheel a16 is installed at two corresponding positions in each third through groove 602 of each first clamping block 6, so as to ensure that the axial hole of each first wheel a16 is aligned with the fifth through hole 603 of the corresponding first clamping block 6, and then a first hinge a8 is installed in each through hole of each pair, so that the first wheel a16 can be assembled with the first clamping block 6.

Then, a second wheel b16 is mounted in the first groove 303 of each second block 3, so as to ensure that the axle hole of each second wheel b16 is aligned with the corresponding fourth through hole 304 of the second block 3, and then a second hinge b8 is mounted in the through hole of each pair, so that the second wheel b16 can be assembled with the second block 3.

Then, the second through holes 201 at one end of the four connecting rods 2 are respectively aligned with the four third through holes 302 of the two second clamping blocks 3, and then a third hinge c8 is respectively installed in each aligned through hole, so that the four connecting rods 2 and the two second clamping blocks 3 can be assembled.

Then, the second through holes 201 at the other ends of the four connecting rods 2 are respectively aligned with the four first through holes 103 of the two connecting brackets 1, and then a third hinge c8 is respectively installed in each aligned through hole, so that the second clamping sleeve, the four connecting rods 2 and the connecting bracket sleeve can be assembled.

Then, a saw blade 10 is installed in a sixth through hole 901 of the workbench 9 to ensure that a ninth through hole 1001 of the saw blade 10 is aligned with an eighth through hole 905 of the workbench 9, then a shaft 12 is installed in the aligned through hole to ensure that the ninth through hole 1001 of the saw blade 10 is sleeved on a clamping section 1201 of the shaft 12, then two first nuts a13 are respectively penetrated through the eighth through hole 905 and screwed on threaded sections 1202 at two ends of the shaft 12, then two rolling bearings 15 are respectively installed in fourth grooves 1101 of two bearing seats 11, then shaft connecting sections 1203 at two ends of the shaft 12 are respectively installed in the two rolling bearings 15, then second outer edges 1103 of the two bearing seats 11 are respectively placed on two first outer edges 903 of the workbench 9 to ensure that an eleventh through hole 1104 of the bearing seats 11 is aligned with a seventh through hole 904 of the workbench 9, then, a third screw c5 is installed in each pair of through holes, and a second nut b13 is screwed to the other end of each third screw c5, so that the saw blade 10, the table 9 and the bearing housing 11 can be assembled.

Then the base is placed on the ground, then two first block 6 with first wheel a16 are placed on the bottom plate 4a, ensuring the first wheel a16 is located in the second groove 401 of the bottom plate 4a, then two second block 3 with second wheel b16 are respectively placed on the two first block 6, ensuring the second wheel b16 is located in the third groove 601 of the first block set, then the third screw holes 902 at both ends of the working table 9 are respectively aligned with the first screw holes 101 of the two connecting brackets 1, then a second screw b5 is screwed into each screw hole of the alignment, and finally a first screw a5 is screwed into each second screw hole 402 of the first side plate 4b, thus the whole device is assembled and can be put into use.

The utility model provides a working principle of device does: as shown in fig. 24, each of the point a, the point B, the point C, the point D, the point E, the point F, the point G, and the point H is an axis of a through hole at two ends of the second locking block 3 or the two connecting brackets 1, the point M and the point N are midpoints of a line segment AH and a line segment DE, respectively, and the point X is an intersection point of a line segment MN and a line segment BG.

Because this device adopts the symmetrical structure design, this can guarantee that octagonal frame ABCDEFGH is a symmetrical structure, can deduce hexagon ABCDEFGH from this and hexagon HGFENM congruent, and line segment MN is the symmetry axis of octagonal frame ABCDEFGH, the axis of steel pipe must be passed through to the vertical face that line segment MN belonged to promptly, this can guarantee in the cutting process of every turn that the cutting face of saw bit is all the time along the radial of steel pipe.

The use method for longitudinally cutting the small-caliber steel pipe comprises the following steps: as shown in fig. 1 to 3, firstly, the whole of the second locking kit, the connecting rod 6, the connecting bracket kit and the workbench 9 is lifted from the upper surface of the first locking kit, then the steel pipe 7 is stably placed on the bottom plate 4a and between the two first locking blocks 6, and then synchronously screwed into the two first screws a5 in the second screw holes 402 of the first side plate 4b at a constant speed, and when the two first locking blocks 6 can contact the steel pipe 7 at the same time, the screwing of the first screws a5 is stopped.

Then the whole composed of the second clamping external member, the connecting rod 6, the connecting support external member and the working table 9 is placed on the first clamping external member again, then the whole is synchronously screwed into the two second screws b5 on the connecting support external member, when the second wheel b16 installed on the second clamping external member can enter the third groove 601 of the first clamping external member at the same time, the screwing of the two second screws b5 is stopped, the saw blade 10 is rotated through the shaft connecting section 1203 of the shaft 12, the second clamping external member is pushed at the same speed in the process of cutting the steel pipe 7 by the saw blade 10 until the steel pipe 7 is completely cut along the longitudinal direction, at the moment, the shaft 12 is stopped rotating, the second clamping external member is stopped being pushed, and the cutting task operation is completed.

The use method for longitudinally cutting the large-diameter steel pipe comprises the following steps: as shown in fig. 4 to 6, the whole of the second locking sleeve, the connecting rod 6, the connecting bracket sleeve and the workbench 9 is lifted from the upper surface of the first locking sleeve, the steel pipe 7 is stably placed on the bottom plate 4a and between the two first locking blocks 6, and then synchronously screwed into the two first screws a5 in the second screw holes 402 of the first side plate 4b at a constant speed, and when the two first locking blocks 6 can contact the steel pipe 7 at the same time, the screwing of the first screws a5 is stopped.

Then, the two positioning blocks 14 are respectively placed on the two first positioning blocks 6, so as to ensure that the boss 1402 of the positioning block 14 can enter the third groove 601 of the first positioning sleeve, then the second positioning sleeve, the connecting rod 6, the connecting bracket sleeve and the workbench 9 are stably placed on the positioning block 14, then the two second screws b5 on the two connecting brackets 1 are synchronously screwed into the second positioning sleeve at a constant speed, when the second wheel b16 installed on the second positioning sleeve can simultaneously enter the fifth groove 1401 of the positioning block 14, the screwing of the two second screws b5 is stopped, the saw blade 10 is rotated through the shaft connecting section 1203 of the shaft 12, and the second positioning sleeve is pushed at a constant speed during the process of cutting the steel pipe 7 by the saw blade 10 until the steel pipe 7 is completely cut along the longitudinal direction, at this time, the shaft 12 stops rotating, the second blocking external member stops pushing, and the cutting task operation is completed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (18)

1. A longitudinal cutting device for steel pipes, characterized by comprising:

the base comprises a bottom plate (4a) and a first side plate (4b) and a second side plate (4c) which are respectively arranged at two ends of the bottom plate (4 a);

the first clamping external member comprises two first clamping blocks (6) which are movably arranged on the bottom plate (4 a);

the second clamping external member comprises two second clamping blocks (3) which are movably arranged on the first clamping block (6);

the connecting bracket kit comprises two connecting brackets (1), wherein the two connecting brackets (1) are movably connected with the two second clamping blocks (3);

the two ends of the workbench (9) are connected with the two connecting supports (1), and a saw blade (10) is arranged on the workbench (9).

2. The device according to claim 1, characterized in that the upper surface of the bottom plate (4a) is provided with two second grooves (401) parallel to each other, and the first catch block (6) is provided with a first wheel (a16) adapted to the second grooves (401).

3. The device according to claim 2, characterized in that the first catch block (6) is provided with a third through slot (602) adapted to the first wheel (a16), in that the third through slot (602) is provided on both sides with a fifth through hole (603), in that the first wheel (a16) is provided inside the third through slot (602) by means of a first hinge (a8), and in that the first hinge (a8) is arranged through the fifth through hole (603).

4. The device according to claim 3, characterized in that said first wheel (a16) is 4.

5. The device according to claim 2, characterized in that said first side plate (4b) is also provided with two second threaded holes (402), inside said second threaded holes (402) there being a first threaded rod (a5), said first threaded rod (a5) being contactable with said first block (6).

6. The device according to claim 5, characterized in that the upper surface of the first block (6) is provided with two third grooves (601) parallel to each other, and the second block (3) is provided with a second wheel (b16) matching with the third grooves (601).

7. The device according to claim 6, characterized in that the second catch block (3) is provided with a first groove (303) adapted to the second wheel (b16), the first groove (303) is provided with fourth through holes (304) on both sides, the second wheel (b16) is provided within the first groove (303) by a second hinge (b8), and the second hinge (b8) is provided through the fourth through holes (304).

8. The device according to claim 7, characterized in that said second wheel (b16) is 4.

9. The device according to claim 6, characterized in that two of the connecting brackets (1) are connected with two of the second detent blocks (3) by four connecting rods (2).

10. The device according to claim 9, wherein a second through groove (301) is respectively formed at two ends of the second clamping block (3), third through holes (302) are respectively formed at the upper side and the lower side of the second through groove (301), correspondingly, a first through groove (102) is respectively formed at two ends of the connecting bracket (1), first through holes (103) are respectively formed at the upper side and the lower side of the first through groove (102), and the connecting bracket (1) and the second clamping block (3) are respectively connected with the third through hole (302) and the first through hole (103) by using the connecting rod (2).

11. The device according to claim 9, wherein the connecting bracket (1) is a rectangular parallelepiped structure, a first screw hole (101) is formed in the connecting bracket (1) at a central position, and a second screw (b5) is arranged in the first screw hole (101); and third screw holes (902) are correspondingly formed in two ends of the workbench (9), wherein the second screw (b5) penetrates through the first screw hole (101) and is connected with the third screw holes (902).

12. The device according to claim 11, characterized in that the table (9) is of a rectangular parallelepiped structure, and the upper surface of the table (9) is provided with a sixth through hole (901) for mounting the saw blade (10).

13. The device according to claim 12, characterized in that the saw blade (10) is rotatably arranged on a bearing assembly, and that the sixth through hole (901) is further provided with eighth through holes (905) on both sides, and that the bearing assembly is fixedly arranged on the table (9).

14. The device according to claim 13, characterized in that the bearing assembly comprises a bearing housing (11), a rolling bearing (15) and a shaft (12); the saw blade support is characterized in that the number of the bearing seats (11) is two, the bearing seats (11) are provided with fourth cylindrical grooves (1101), rolling bearings (15) are arranged in the fourth grooves (1101), a tenth through hole (1102) is formed in the axis position of each fourth groove (1101), the shaft (12) penetrates through the tenth through hole (1102) and the eighth through hole (905), the shaft (12) is provided with a clamping section (1201) and a shaft connecting section (1203), the saw blade (10) is fixedly arranged on the clamping section (1201) of the shaft (12), and the shaft connecting section (1203) is arranged in the two rolling bearings (15) which are arranged oppositely.

15. The device according to claim 14, characterized in that the left and right sides of the workbench (9) are respectively provided with a first outer edge (903), the first outer edge (903) is provided with a seventh through hole (904), correspondingly, both ends of the bearing seat (11) are respectively provided with a second outer edge (1103), the second outer edge (1103) is provided with an eleventh through hole (1104), and the bearing seat (11) is fixedly connected with the workbench (9) through a third screw (c5) and a second nut (b 13).

16. The device according to claim 14, characterized in that the shaft (12) is further provided with a threaded section (1202), and both ends of the saw blade (10) are respectively provided with a first nut (a13), and the first nut (a13) is screwed on the threaded section (1202).

17. The device according to claim 16, further comprising a spacer block (14) arranged between the first capture block (6) and the second capture block (3).

18. The device according to claim 17, characterized in that the upper surface of the pad block (14) is provided with a fifth groove (1401) adapted to the second wheel (b16), and the lower surface of the pad block (14) is provided with a boss (1402) adapted to the third groove (601).

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