Galvanized steel pipe end thread cutting device

Abstract

The present invention relates to the technical field of metal processing equipment, and specifically to a galvanized steel pipe end thread cutting device, which includes a base, the top of the base is fixedly connected to an electric slide rail, the electric slide rail is slidably connected to a stabilizing column, the base is fixedly connected to an outer shell at the top of one side of the stabilizing column, the inner wall of the outer shell is fixedly connected to an inner protective shell, a rotating component is provided on the inner side of the inner protective shell, the rotating component is provided with a switching component on the side away from the motor, and the switching component is provided with a grinding column on the end away from the rotating component; the present invention drives the No. 2 connecting rod through the motor to drive the insertion rod and the tool handle to rotate along the inner wall of the inner gear ring, thereby realizing the switching effect of the inner and outer cutting knives, and then through the switching of the electric conversion plate, it cooperates with the electric telescopic part of the No. 2 telescopic rod to realize the free switching of the inner and outer cutting knives and the extension or shortening of the tool handle, which can achieve the cutting effect of different thread lengths.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing equipment, in particular to a galvanized steel pipe end thread cutting device. Background Art

[0002] Galvanized steel pipe end thread cutting usually adopts three methods: manual sawing, manual knife cutting or mechanical cutting. Among them, mechanical cutting (such as electric threading machine) is the most commonly used method at present because of its high efficiency, easy operation and reduced labor intensity.

[0003] The Chinese announcement number is: CN118682211B, which discloses a galvanized steel pipe end thread processing device, including a base, a cutting assembly is provided on the base, a transposition circular plate is rotatably installed on the base, and the transposition circular plate is provided with a first fixing assembly and a second fixing assembly. By providing a fan-shaped support seat 1 and a fan-shaped support seat 2, it is possible to facilitate the lifting of the galvanized steel pipe and improve the installation efficiency of the galvanized steel pipe, and the position of the fan-shaped support seat 2 can be locked by the limiting circular block and the fan-shaped limiting strip. By providing the first fixing assembly and the second fixing assembly, the galvanized steel pipe can be quickly fixed and the galvanized steel pipe can be changed in real time, that is, the processing position of the galvanized steel pipe can be supported in real time. By providing the cutting assembly, the position of the thread cutting blade can be quickly adjusted, so that the inner side or outer side of the galvanized steel pipe can be threaded according to needs;

[0004] Although the above patent utilizes the first fixing component and the second fixing component to realize the rapid fixation of the galvanized steel pipe, and can also provide real-time support for the processing position of the galvanized steel pipe, considering that a single cutting device can only perform a single cutting effect on the inner wall or the outer wall of the galvanized steel pipe, if the effect of cutting both the inner and outer walls is required, another device is required, which is not only time-consuming and labor-intensive, but also cumbersome.

[0005] In view of this, we propose a galvanized steel pipe end thread cutting device. Summary of the Invention

[0006] The object of the present invention is to provide a galvanized steel pipe end thread cutting device to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides a galvanized steel pipe end thread cutting device, comprising a base, a motorized slide rail fixedly connected to the top of the base, a stabilizing column slidably connected to the motorized slide rail, a housing fixedly connected to the top of one side of the stabilizing column, an inner protective shell fixedly connected to the inner wall of the housing, a rear cover fixedly connected to one end of the inner protective shell, a motor fixedly connected to one side of the rear cover, and a switching chamber fixedly connected to the end of the inner protective shell away from the rear cover;

[0008] A rotating assembly is provided inside the inner protective shell, a switching assembly is provided on a side of the rotating assembly away from the motor, a polishing column is provided on an end of the switching assembly away from the rotating assembly, and a fixing ring is fixedly connected to the outer wall of the polishing column.

[0009] As a preferred embodiment of the present invention, the inner wall of the switching chamber is fixedly connected to a No. 1 restriction ring, and the switching chamber is fixedly connected to a front cover at one end away from the No. 1 restriction ring. The inner wall of the No. 1 restriction ring is provided with a No. 1 annular groove and a conversion groove, and the No. 1 annular groove and the conversion groove are connected. An electric conversion plate is provided at the junction of the No. 1 annular groove and the conversion groove, wherein:

[0010] An inner gear ring is fixedly connected between the switching chamber and the inner protective shell, and a sliding column is slidably connected to the inner wall of the inner gear ring.

[0011] As a preferred embodiment of the present invention, the rotating assembly includes a sliding rod, the middle end of the sliding rod is fixedly connected to a No. 1 worm gear, the outer walls of both ends of the sliding rod are provided with fixed columns, the sliding rod passes through and is slidably connected to the inner side of the fixed column, the outer wall of the fixed column is rotatably connected to a No. 1 connecting rod, and the No. 1 connecting rod is fixedly connected to an interpenetrating rod at one end away from the fixed column, wherein:

[0012] The grinding column is fixedly connected to an end of the sliding rod away from the motor.

[0013] As a preferred embodiment of the present invention, the middle end of the interpenetrating rod is rotatably connected to a No. 2 worm, the No. 2 worm is meshingly connected to the No. 1 worm, one end of the No. 2 worm is fixedly connected to a circular gear, and the circular gear is meshingly connected to the internal gear ring.

[0014] As a preferred embodiment of the present invention, one end of the penetration rod is fixedly connected to a No. 2 connecting rod, and the No. 2 connecting rod is fixedly connected to the output end of the motor by passing through the rear cover at the end away from the penetration rod.

[0015] As a preferred embodiment of the present invention, the switching assembly includes a No. 1 disc, which is fixedly connected to one side of the fixed column. The No. 1 disc is provided with a No. 2 annular groove at the end away from the fixed column. The No. 2 disc is provided on the outer wall of one side of the No. 2 annular groove, and the No. 2 disc is in contact with the outer wall of the No. 1 disc.

[0016] As a preferred embodiment of the present invention, the through rod is fixedly connected to the output end of the No. 1 telescopic rod at the end away from the No. 2 connecting rod, a fixed block is fixedly connected to the outer wall of the middle end of the No. 1 telescopic rod, and one side of the fixed block is fixedly connected to the No. 1 raised column, the diameter of the No. 1 raised column matches the width of the conversion groove and the No. 1 annular groove, and the No. 1 raised column is slidably connected in the conversion groove and the No. 1 annular groove.

[0017] As a preferred embodiment of the present invention, the end of the No. 1 telescopic rod away from the interpenetrating rod is fixedly connected to the No. 3 connecting rod, the end of the No. 3 connecting rod away from the No. 1 telescopic rod is provided with the No. 2 telescopic rod, the outer wall of the output end of the No. 2 telescopic rod is fixedly connected to the No. 2 restriction ring, and the No. 3 connecting rod is rotatably connected to the outer wall of the No. 2 restriction ring at the end away from the No. 1 telescopic rod, wherein:

[0018] The first telescopic rod and the second telescopic rod are both connected to the sliding column through sliding.

[0019] As a preferred embodiment of the present invention, the output end of the second telescopic rod is fixedly connected to a knife handle, the knife handle is a cube, and the outer cutting blade and the inner cutting blade are movably connected to the opposite sides of the knife handle, wherein:

[0020] A groove is formed on the top of the stabilizing column, and the shapes of the outer walls of the other two opposite sides of the knife handle match the shape of the groove.

[0021] As a preferred embodiment of the present invention, the No. 2 telescopic rod is fixedly connected to the No. 4 connecting rod at the end away from the knife handle, and the No. 4 connecting rod is fixedly connected to the No. 2 raised column at the end away from the No. 2 telescopic rod, and the No. 2 raised column is slidably connected in the No. 2 annular groove.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the galvanized steel pipe end thread cutting device, the motor drives the No. 2 connecting rod to drive the insertion rod and the cutter handle to rotate along the inner wall of the inner gear ring, thereby realizing the switching effect of the inner and outer cutting knives, and being able to cut the thread head on both the inner and outer walls of the galvanized steel pipe.

[0024] 2. In the galvanized steel pipe end thread cutting device, by switching the electric conversion plate, it cooperates with the electric telescopic part of the No. 2 telescopic rod to make the No. 2 raised column slide along the No. 2 annular groove, thereby realizing the free switching of the inner and outer cutting knives and the extension or shortening of the tool handle, which can achieve the cutting effect of different thread lengths.

[0025] 3. In the galvanized steel pipe end thread cutting device, the grinding column is moved by the transmission effect between the No. 1 worm and the No. 2 worm 321, and the galvanized steel pipe that has been cut can be ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall three-dimensional schematic diagram of the galvanized steel pipe end thread cutting device of the present invention;

[0027] Figure 2 This is a schematic cross-sectional view of the overall structure of the galvanized steel pipe end thread cutting device of the present invention;

[0028] Figure 3This is a half-cutaway perspective diagram of the outer shell of the galvanized steel pipe end thread cutting device of the present invention;

[0029] Figure 4 This is a schematic internal perspective view of the galvanized steel pipe end thread cutting device of the present invention;

[0030] Figure 5 This is an enlarged schematic diagram of part A of the galvanized steel pipe end thread cutting device of the present invention;

[0031] Figure 6 This is a perspective schematic diagram of the rotating assembly of the galvanized steel pipe end thread cutting device of the present invention;

[0032] Figure 7 This is a three-dimensional schematic diagram of the switching assembly of the galvanized steel pipe end thread cutting device of the present invention;

[0033] Figure 8 This is a perspective schematic diagram of the switching assembly of the galvanized steel pipe end thread cutting device of the present invention;

[0034] Figure 9 A three-dimensional schematic diagram of the details of the limiting ring of the galvanized steel pipe end thread cutting device of the present invention;

[0035] The meaning of each number in the figure is:

[0036] 1. Base; 11. Electric slide rail; 111. Stabilizing column; 112. Groove; 12. Outer shell; 121. Inner protective shell; 122. Back cover; 123. Motor; 13. Switching chamber; 131. Limiting ring No. 1; 1311. Annular groove No. 1; 1312. Switching groove; 132. Front cover; 133. Internal gear ring; 1333. Sliding column; 2. Grinding column; 21. Retaining ring;

[0037] 3. Rotating assembly; 31. Sliding rod; 311. Worm gear No. 1; 312. Fixed column; 313. Connecting rod No. 1; 32. Inserting rod; 321. Worm gear No. 2; 322. Circular gear; 323. Connecting rod No. 2;

[0038] 4. Switching assembly; 41. Disc No. 1; 411. Annular groove No. 2; 412. Disc No. 2; 42. Telescopic rod No. 1; 421. Fixing block; 422. Raised column No. 1; 423. Connecting rod No. 3; 43. Telescopic rod No. 2; 431. Limiting ring No. 2; 432. Tool handle; 4321. Outer cutting blade; 4322. Inner cutting blade; 433. Connecting rod No. 4; 4331. Raised column No. 2. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] Example 1: Please refer to Figures 1-9 As shown, this embodiment provides a galvanized steel pipe end thread cutting device, including a base 1, an electric slide rail 11 is fixedly connected to the top of the base 1, a stabilizing column 111 is slidably connected to the electric slide rail 11, the base 1 is fixedly connected to an outer shell 12 at the top of one side of the stabilizing column 111, an inner protective shell 121 is fixedly connected to the inner wall of the outer shell 12, one end of the inner protective shell 121 is fixedly connected to a back cover 122, one side of the back cover 122 is fixedly connected to a motor 123, the inner protective shell 121 is fixedly connected to a switching chamber 13 at the end away from the back cover 122, a rotating component 3 is provided on the inner side of the inner protective shell 121, a switching component 4 is provided on the side of the rotating component 3 away from the motor 123, a grinding column 2 is provided at the end of the switching component 4 away from the rotating component 3, and the outer wall of the grinding column 2 is fixedly connected to a fixing ring 21.

[0042] like Figure 2-Figure 3 and Figure 9 As shown, the inner wall of the switching chamber 13 is fixedly connected to the No. 1 limiting ring 131, and the switching chamber 13 is fixedly connected to the front cover 132 at the end away from the No. 1 limiting ring 131. The inner wall of the No. 1 limiting ring 131 is provided with a No. 1 annular groove 1311 and a conversion groove 1312, and the No. 1 annular groove 1311 and the conversion groove 1312 are connected. An electric conversion plate is provided at the connecting position of the No. 1 annular groove 1311 and the conversion groove 1312, wherein: an inner gear ring 133 is fixedly connected between the switching chamber 13 and the inner protective shell 121, and a sliding column 1333 is slidably connected to the inner wall of the inner gear ring 133.

[0043] like Figure 4-Figure 6As shown, the rotating assembly 3 includes a sliding rod 31, the middle end of the sliding rod 31 is fixedly connected to the No. 1 worm gear 311, and the outer walls of both ends of the sliding rod 31 are provided with fixed columns 312. The sliding rod 31 passes through and is slidably connected to the inner side of the fixed column 312. The outer wall of the fixed column 312 is rotatably connected to the No. 1 connecting rod 313. The No. 1 connecting rod 313 is fixedly connected to the end away from the fixed column 312 with an interlaced rod 32, wherein: the grinding column 2 is fixedly connected to the sliding rod 31 away from the electric At one end of the machine 123, the middle end of the insertion rod 32 is rotatably connected to the No. 2 worm 321, the No. 2 worm 321 is meshed with the No. 1 worm 311, one end of the No. 2 worm 321 is fixedly connected to a circular gear 322, the circular gear 322 is meshed with the inner gear ring 133, and one end of the insertion rod 32 is fixedly connected to the No. 2 connecting rod 323, and the No. 2 connecting rod 323 is fixedly connected to the output end of the motor 123 at the end away from the insertion rod 32 by passing through the rear cover 122.

[0044] like Figure 7-Figure 8 As shown, the switching assembly 4 includes a No. 1 disc 41, which is fixedly connected to one side of the fixed column 312. The No. 1 disc 41 is provided with a No. 2 annular groove 411 at one end away from the fixed column 312. The outer wall of one side of the No. 2 annular groove 411 is provided with a No. 2 disc 412. The No. 2 disc 412 is attached to the outer wall of the No. 1 disc 41. The interpenetrating rod 32 is fixedly connected to the output end of the No. 1 telescopic rod 42 at one end away from the No. 2 connecting rod 323. The middle end of the No. 1 telescopic rod 42 is fixedly connected to the output end of the No. 1 telescopic rod 42. The outer wall is fixedly connected with a fixed block 421, and one side of the fixed block 421 is fixedly connected with a No. 1 raised column 422. The diameter of the No. 1 raised column 422 matches the width of the conversion groove 1312 and the No. 1 annular groove 1311. The No. 1 raised column 422 is slidably connected in the conversion groove 1312 and the No. 1 annular groove 1311. The No. 1 telescopic rod 42 is fixedly connected to a No. 3 connecting rod 423 at one end away from the interpenetrating rod 32. The No. 3 connecting rod 423 is set at the end away from the No. 1 telescopic rod 42. There is a second telescopic rod 43, the outer wall of the output end of the second telescopic rod 43 is fixedly connected to the second limiting ring 431, and the third connecting rod 423 is rotatably connected to the outer wall of the second limiting ring 431 at the end away from the first telescopic rod 42, wherein: the first telescopic rod 42 and the second telescopic rod 43 are both slidably connected to the sliding column 1333, and the output end of the second telescopic rod 43 is fixedly connected to the handle 432, which is a cube, and the opposite sides of the handle 432 are movably connected to the outer wall of the second limiting ring 431. The cutting blade 4321 and the inner cutting blade 4322, wherein: a groove 112 is provided on the top of the stabilizing column 111, and the outer wall shapes on the other opposite sides of the handle 432 are consistent with the shape of the groove 112, the No. 2 telescopic rod 43 is fixedly connected to the No. 4 connecting rod 433 at the end away from the handle 432, and the No. 4 connecting rod 433 is fixedly connected to the No. 2 raised column 4331 at the end away from the No. 2 telescopic rod 43, and the No. 2 raised column 4331 is slidably connected in the No. 2 annular groove 411.

[0045] The second telescopic rod 43 is a double-ended telescopic rod. The handle 432 of the second telescopic rod 43 is driven by the third connecting rod 423 to perform passive telescopic movement, while the fourth connecting rod 433 at the other end is electrically controlled to extend and retract.

[0046] From this we can see that when it is necessary to cut the inner and outer wall thread heads of galvanized steel pipes, Figure 2-Figure 4 As shown, in the preparation stage, the worker fixes the galvanized steel pipe to be cut on the clamping device on the lathe, and then points the end to be cut toward the device. At this time, the lathe is started to gradually move the device closer to the end of the galvanized steel pipe, and the clamping device rotates and drives the galvanized steel pipe to rotate together. At this time, the lathe drives the outer cutting blade 4321 on the cutting device to gradually approach the galvanized steel pipe to cut the thread thereof;

[0047] When the inner wall or outer wall thread cutting of the galvanized steel pipe is completed and the inner wall needs to be converted to outer wall cutting, or the outer wall needs to be converted to inner wall cutting, the No. 2 connecting rod 323 is driven by the motor 123 to rotate. At the same time, the No. 2 connecting rod 323 will drive the insertion rod 32 and the No. 1 telescopic rod 42 to rotate together. At this time, when the No. 1 telescopic rod 42 rotates 180 degrees along the No. 1 limiting ring 131, the No. 2 telescopic rod 43 will also rotate together, and the No. 2 telescopic rod 43 will flip the handle 432 180 degrees during the rotation process. This process will switch the positions of the inner cutting blades 4322 and the outer cutting blades 4321 on the opposite sides of the handle 432 relative to the galvanized steel pipe, so that the inner cutting blade 4322 is converted to the outer cutting blade 4321, or the outer cutting blade 4321 is converted to the inner cutting blade 4322, so as to switch the cutting of the inner and outer wall threads of the galvanized steel pipe;

[0048] During the rotation of the insertion rod 32, the first telescopic rod 42 and the second telescopic rod 43 along the first limiting ring 131, the first protruding column 422 will slide along the first annular groove 1311. At this time, if the program set in the control room is to switch the cutting mode, the electric conversion plate at the connection between the first annular groove 1311 and the conversion groove 1312 will block a part of the first annular groove 1311, so that the first protruding column 422 will be driven by the electric conversion plate when it slides to the position of the electric conversion plate. The block of the plate change slides into the conversion groove 1312. At this time, the conversion groove 1312 drives the No. 1 protruding column 422 to slide to the right, and drives the No. 1 telescopic rod 42 to extend. The No. 1 telescopic rod 42 will in turn drive the No. 2 telescopic rod 43 to extend, driving the handle 432 close to the stable column 111. The handle 432 is fixed on the stable column 111, strengthening the stability of the outer cutting blade 4321 and the inner cutting blade 4322. The handle 432 rotated to different sides also has different extension lengths. Figure 8As shown, the tool handle 432 on the right side will be retracted and moved closer to the grinding column 2, while the tool handle 432 rotated to the left side will be extended and moved away from the grinding column 2, so that different thread lengths can be adapted during the cutting process of the galvanized steel pipe.

[0049] It should be noted that when there is no need to switch the inner and outer knives but the extended position of the knife handle 432 needs to be switched, the electric extension of the No. 2 telescopic rod 43 at the end of the No. 4 connecting rod 433 causes the No. 2 protruding column 4331 on the No. 4 connecting rod 433 to penetrate into the No. 2 annular groove 411. At this time, during the rotation of the No. 2 telescopic rod 43, the No. 2 protruding column 4331 will be driven to slide in the No. 2 annular groove 411, that is, during the rotation of the No. 2 telescopic rod 43, the No. 2 protruding column 4331 will always be on the outside of the No. 2 telescopic rod 43, so the knife handle 432 is facing the knife on this side of the galvanized steel pipe in the initial position, and after the No. 2 telescopic rod 43 rotates 180 degrees, it is also facing the galvanized steel pipe, but the knife handle 432 is extended or contracted by a certain distance.

[0050] In addition, when the galvanized steel pipe needs to be polished and ground after cutting, the control room controls the electric conversion plate to block the conversion groove 1312, so that the No. 1 raised column 422 is always in the No. 1 annular groove 1311 and slides, that is, the shank 432 will no longer extend, and at the same time control the No. 2 raised column 4331 to go deeper into the No. 2 annular groove 411. At this time, the galvanized steel pipe after cutting will gradually approach the polishing column 2 under the drive of the lathe. At the same time, the motor 123 drives the No. 2 connecting rod 323 and the insertion rod 32 to rotate along the inner side of the inner gear ring 133. At this time, the circular gear 322 rotates inside the inner gear ring 133 and drives the No. 2 worm 321 to rotate together. The rotation of the No. 2 worm 321 will drive the No. 1 worm 311 to move to one side. At this time, the movement of the sliding rod 31 will drive the polishing column 2 to move to one side of the galvanized steel pipe and polish the outer wall of the galvanized steel pipe after cutting.

[0051] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A galvanized steel pipe end thread cutting device, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to an electric slide rail (11), a stabilizing column (111) is slidably connected to the electric slide rail (11), the base (1) is fixedly connected to a housing (12) at the top of one side of the stabilizing column (111), the inner wall of the housing (12) is fixedly connected to an inner protective shell (121), one end of the inner protective shell (121) is fixedly connected to a back cover (122), one side of the back cover (122) is fixedly connected to a motor (123), and the inner protective shell (121) is fixedly connected to a switching chamber (13) at one end away from the back cover (122); A rotating assembly (3) is provided inside the inner protective shell (121); a switching assembly (4) is provided on a side of the rotating assembly (3) away from the motor (123); a grinding column (2) is provided on an end of the switching assembly (4) away from the rotating assembly (3); and a fixing ring (21) is fixedly connected to the outer wall of the grinding column (2); The rotating assembly (3) includes a sliding rod (31), the middle end of the sliding rod (31) is fixedly connected to a No. 1 worm gear (311), the outer walls of both ends of the sliding rod (31) are provided with fixed columns (312), the sliding rod (31) is slidably connected to the inner side of the fixed column (312), the outer wall of the fixed column (312) is rotatably connected to a No. 1 connecting rod (313), and the No. 1 connecting rod (313) is fixedly connected to an interpenetrating rod (32) at one end away from the fixed column (312), wherein: The grinding column (2) is fixedly connected to an end of the sliding rod (31) away from the motor (123); The switching assembly (4) includes a No. 1 disc (41), the No. 1 disc (41) is fixedly connected to one side of the fixed column (312), the No. 1 disc (41) is provided with a No. 2 annular groove (411) at one end away from the fixed column (312), the No. 2 disc (412) is provided on the outer wall of one side of the No. 2 annular groove (411), and the No. 2 disc (412) is in contact with the outer wall of the No. 1 disc (411); The insertion rod (32) is fixedly connected to the output end of the No. 1 telescopic rod (42) at one end away from the No. 2 connecting rod (323); the outer wall of the middle end of the No. 1 telescopic rod (42) is fixedly connected to a fixed block (421); one side of the fixed block (421) is fixedly connected to a No. 1 raised column (422); the diameter of the No. 1 raised column (422) matches the width of the conversion groove (1312) and the No. 1 annular groove (1311); the No. 1 raised column (422) is slidably connected in the conversion groove (1312) and the No. 1 annular groove (1311); The first telescopic rod (42) is fixedly connected to the third connecting rod (423) at one end away from the interpenetrating rod (32), the third connecting rod (423) is provided with the second telescopic rod (43) at one end away from the first telescopic rod (42), the output end outer wall of the second telescopic rod (43) is fixedly connected to the second limiting ring (431), and the third connecting rod (423) is rotatably connected to the outer wall of the second limiting ring (431) at one end away from the first telescopic rod (42), wherein: The first telescopic rod (42) and the second telescopic rod (43) are both slidably connected to the sliding column (1333); The output end of the second telescopic rod (43) is fixedly connected to a knife handle (432), the knife handle (432) is a cube, and the knife handle (432) has an outer cutting blade (4321) and an inner cutting blade (4322) movably connected to two opposite sides thereof, wherein: A groove (112) is provided at the top of the stabilizing column (111), and the shapes of the outer walls of the other two opposite sides of the knife handle (432) match the shape of the groove (112).

2. A galvanized steel pipe end thread cutting device according to claim 1, characterized in that: The inner wall of the switching chamber (13) is fixedly connected to a No. 1 restriction ring (131), and the switching chamber (13) is fixedly connected to a front cover (132) at one end away from the No. 1 restriction ring (131). The inner wall of the No. 1 restriction ring (131) is provided with a No. 1 annular groove (1311) and a conversion groove (1312), the No. 1 annular groove (1311) and the conversion groove (1312) are connected, and an electric conversion plate is provided at the connecting position of the No. 1 annular groove (1311) and the conversion groove (1312), wherein: An inner gear ring (133) is fixedly connected between the switching chamber (13) and the inner protective shell (121), and a sliding column (1333) is slidably connected to the inner wall of the inner gear ring (133).

3. The galvanized steel pipe end thread cutting device according to claim 1, characterized in that: The middle end of the insertion rod (32) is rotatably connected to a second worm (321), the second worm (321) is meshingly connected to the first worm (311), and one end of the second worm (321) is fixedly connected to a circular gear (322), the circular gear (322) is meshingly connected to the inner gear ring (133).

4. A galvanized steel pipe end thread cutting device according to claim 3, characterized in that: One end of the insertion rod (32) is fixedly connected to a second connecting rod (323), and the second connecting rod (323) is fixedly connected to the output end of the motor (123) by passing through the rear cover (122) at the end away from the insertion rod (32).

5. The galvanized steel pipe end thread cutting device according to claim 1, characterized in that: The second telescopic rod (43) is fixedly connected to a fourth connecting rod (433) at one end away from the knife handle (432), and the fourth connecting rod (433) is fixedly connected to a second raised column (4331) at one end away from the second telescopic rod (43), and the second raised column (4331) is slidably connected in the second annular groove (411).

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