A steel structure support convenient for welding and coating

Abstract

The invention provides a steel structure pillar which is convenient for welding and coating, and relates to the technical field of steel structure connection, comprising: a circular pillar, wherein a butt-jointing square hole is provided in the middle of the upper and lower sides of the circular pillar, and two groups of circular pillars can be connected by inserting a square pin in the butt-jointing square hole; four groups of limiting slide grooves are provided on the outside of the circular pillar; a lower sliding ring is slidably arranged on the outside of the circular pillar; a piston ring is arranged, and a function of rapid and automatic coating is provided. When the lower sliding ring and the upper sliding ring are closed, a gas telescopic rod B is used to press the gas telescopic rod C downward, and the air in the gas telescopic rod C is input into the gas telescopic rod D, and the gas telescopic rod D is opened to drive the extrusion piston ring to descend, and the coating in the annular channel is discharged from the discharge hole through the semicircular ring groove, so as to coat the welding area, and the coating can be protected by the lower sliding ring and the upper sliding ring; the problem that the existing pillars do not have the function of rapid and automatic coating is solved.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure connection, in particular to a steel structure pillar which is convenient for welding and coating. Background Art

[0002] Steel structure pillars are mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates. The welds are coated and protected using rust removal and anti-rust processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing to avoid oxidation or rust that would reduce the stability of the connection.

[0003] The steel structure pillars currently used have the following disadvantages:

[0004] 1. The steel structure pillars currently used need to be coated separately after welding, and do not have the function of rapid automatic coating, making it inconvenient to protect them after coating;

[0005] 2. Lack of power control structure that is convenient and quick to close;

[0006] 3. Lack of the function of sealing and limiting the discharge of paint. Summary of the invention

[0007] In view of this, the present invention provides a steel structure pillar which is convenient for welding and coating, and has an annular channel which can receive and store coating materials.

[0008] The invention provides a steel structure pillar which is convenient for welding and coating, and specifically comprises: a circular pillar, wherein a butt-jointing square hole is provided in the middle of the upper and lower sides of the circular pillar, and two groups of circular pillars can be connected by inserting a square pin in the butt-jointing square hole; four groups of limit sliding grooves are provided on the outside of the circular pillar; a lower sliding ring, wherein the lower sliding ring is slidably arranged on the outside of the circular pillar; four groups of accommodating grooves are provided on the upper inner side of the lower sliding ring, and a trapezoidal block A is slidably arranged in the accommodating groove; a gas telescopic rod C, wherein the gas telescopic rod C is fixedly arranged on the inner bottom of the accommodating groove; the bottom of the lower sliding ring is a concave shoulder structure; a gas telescopic rod D, wherein the gas telescopic rod D is fixedly arranged on the bottom of the lower sliding ring; the gas telescopic rod C and the gas telescopic rod D are connected; an annular channel, wherein the annular channel is fixedly arranged on the bottom of the lower sliding ring; a retaining valve, wherein the retaining valve is slidably arranged between the outer side of the annular channel and the inner wall below the outer side of the lower sliding ring; a limit sliding block, wherein the limit sliding block is slidably arranged at the inner middle position of the lower sliding ring; an upper sliding ring, wherein the upper sliding ring is slidably arranged on the outside of the circular pillar, and the upper sliding ring is composed of two groups of semicircular rings spliced ​​together.

[0009] Optionally, the lower sliding ring also includes: a spring rod A, a spring rod A is fixedly arranged on the upper inner side of the limiting sliding groove, a spring is sleeved on the spring rod A and a baffle is fixedly arranged through the trapezoidal block A; a gas telescopic rod A, a gas telescopic rod A is fixedly arranged on the bottom of the trapezoidal block A; a gas telescopic rod B, a gas telescopic rod B is fixedly arranged on the lower side of the trapezoidal block A close to the lower sliding ring, and the gas telescopic rod B is connected with the gas telescopic rod A; a sliding push block, a sliding push block is fixedly arranged on the telescopic end of the gas telescopic rod B; a guide plate, a guide plate is fixedly arranged in a groove in the middle of the inner side of the lower sliding ring for accommodating the limiting sliding block; a propulsion screw, four groups of propulsion screws are arranged in the middle of the outer side of the lower sliding ring; a docking ear, four groups of docking ears are integrally arranged on the outer bottom of the lower sliding ring, and a through hole is opened in the middle of the docking ear.

[0010] Optionally, the gas telescopic rod C includes: a sliding pressure block, the telescopic end of the gas telescopic rod C is fixedly provided with a sliding pressure block, and the telescopic end of the gas telescopic rod C is covered with a spring.

[0011] Optionally, the gas telescopic rod D includes: an extrusion piston ring, and the bottom telescopic end of the gas telescopic rod D is fixedly provided with an extrusion piston ring, and the extrusion piston ring is slidably arranged in the annular channel.

[0012] Optionally, the annular channel includes: a partition, which is integrally arranged on the inner bottom of the annular channel; an opening structure at the outer bottom of the annular channel, and the edges of the opening structure and the partition are both in contact with the valve; a discharge hole, which is opened at the bottom of the annular channel; and a threaded plug, which is fixedly arranged on the inner wall of the annular channel.

[0013] Optionally, the baffle valve includes: a semicircular ring groove, a semicircular ring groove is opened on the lower inner side of the baffle valve; a push rod, a push rod is fixedly arranged at the bottom of the baffle valve, and the bottom of the push rod passes through the lower sliding ring; a spring is arranged on the top of the baffle valve; when the lower sliding ring and the upper sliding ring are fitted together, the push rod is squeezed to lift the baffle valve, and the semicircular ring groove rises to connect the upper and lower spaces of the partition; the gas telescopic rod A is squeezed and contracted by the inner wall below the restricted sliding groove, and the air in the gas telescopic rod A is input into the gas telescopic rod B, and the gas telescopic rod B is used to press the gas telescopic rod C downward, and the air in the gas telescopic rod C is input into the gas telescopic rod D, and the gas telescopic rod D is stretched to drive the extrusion piston ring to descend, and the paint in the annular channel is discharged from the discharge hole through the semicircular ring groove to coat the welding area.

[0014] Optionally, the limit slider includes: a spring rod B, two groups of spring rods B are fixedly arranged on the outside of the limit slider, and the spring rods B pass through the guide plate sleeve to be provided with a spring and are fixedly provided with a blocking plate.

[0015] Optionally, the upper slip ring includes: snap-in ears, four groups of snap-in ears are integrally arranged on the top of the outer side of the upper slip ring; trapezoidal blocks B, four groups of trapezoidal blocks B are slidably arranged on the inner side of the upper slip ring; a rotating rod, a rotating rod is rotatably arranged on the lower outer side of the upper slip ring, the trapezoidal block B is slidably arranged outside the rotating rod, and a spring is arranged on the outside of the rotating rod; a turn buckle, a turn buckle is fixedly arranged on the outer end of the rotating rod; and a convex pile, four groups of convex piles are fixedly arranged on the outer side of the upper slip ring.

[0016] Optionally, four groups of buckle frames are arranged on the outside of the docking ear and the snap-on ear, and the buckle frame includes: a gas telescopic rod E, a gas telescopic rod E is fixedly arranged on the top of the buckle frame, a pushing block is fixedly arranged on the telescopic end of the buckle frame through the buckle frame, and a docking pile is integrally arranged on the bottom of the pushing block; an air pipe, the tops of the four groups of gas telescopic rods E are connected with air pipes, one end of the air pipe is arranged as a three-way structure and is connected with an air release valve and an air pump; the docking pile is stuck in the docking ear, the docking ear and the snap-on ear are wrapped with the buckle frame, the air pump is started to inflate the inside of the gas telescopic rod E, the gas telescopic rod E is stretched by increasing the pressure, and then the upper and lower side docking ears and the snap-on ears are locked, and the lower sliding ring and the upper sliding ring are fitted together; the air release valve can be opened to discharge the gas in the gas telescopic rod E, and the buckle frame can be manually removed.

[0017] The beneficial effects are as follows:

[0018] 1. The piston ring is provided to provide the function of fast and automatic coating. When the lower sliding ring and the upper sliding ring are closed, the gas telescopic rod C is pressed downward by the gas telescopic rod B, and the air in the gas telescopic rod C is input into the gas telescopic rod D. The gas telescopic rod D is opened to drive the extrusion piston ring to descend, and the coating in the annular channel is discharged from the discharge hole through the semicircular ring groove to coat the welding area, and the coating can be protected by the lower sliding ring and the upper sliding ring.

[0019] 2. A buckle frame is set to provide a power control structure that is convenient and quick to close. The lower and upper sliding rings on the upper and lower sides are moved to the outside of the connection between the two sets of circular pillars, and the docking pile is stuck in the docking ear. The docking ear and the snap-on ear are wrapped with the buckle frame, and the air pump is started to inflate the inside of the gas telescopic rod E. The gas telescopic rod E is stretched by increasing the pressure, and then the upper and lower docking ears and the snap-on ears are locked. At the same time, the lower and upper sliding rings are fitted and closed to protect the paint and shape it.

[0020] 3. A baffle valve is set to provide the function of sealing and limiting the discharge of paint. The outer lower opening structure of the annular channel and the edge of the partition are both fitted with the baffle valve. When the lower sliding ring and the upper sliding ring are fitted, the push rod is squeezed to lift the baffle valve, and the semicircular ring groove rises to connect the upper and lower spaces of the partition. At this time, the paint can be discharged and the paint can be well sealed and stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a three-dimensional structure according to an embodiment of the present invention is shown;

[0022] Figure 2 It shows a schematic diagram of an axonometric structure according to an embodiment of the present invention;

[0023] Figure 3 A schematic cross-sectional view of a lower slide ring according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the cross-sectional structure of a lower slide ring according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of an upper slip ring according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of a local enlarged structure of A according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram of a local enlarged structure of B according to an embodiment of the present invention is shown;

[0028] Figure 8 A schematic diagram of a C local enlarged structure according to an embodiment of the present invention is shown.

[0029] Reference numerals list

[0030] 1. Round pillar; 101. Docking square hole; 102. Limiting slide groove; 2. Lower slide ring; 201. Accommodating groove; 202. Spring rod A; 203. Trapezoidal block A; 204. Gas telescopic rod A; 205. Gas telescopic rod B; 206. Sliding push block; 207. Guide piece; 208. Propelling screw; 209. Docking ear; 3. Gas telescopic rod C; 301. Sliding pressure block; 4. Gas telescopic rod D; 401. Extrusion piston ring; 5. Annular channel; 501 , partition; 502, discharge hole; 503, threaded plug; 6, stop valve; 601, semicircular ring groove; 602, push rod; 7, limit slider; 701, spring rod B; 8, upper sliding ring; 801, snap-on ear; 802, trapezoidal block B; 803, rotating rod; 804, rotating buckle; 805, convex pile; 9, buckle frame; 901, gas telescopic rod E; 902, pushing block; 903, docking pile; 904, air pipe; 905, air release valve; 906, air pump. DETAILED DESCRIPTION

[0031] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0032] Example: Please refer to Figures 1 to 8 As shown:

[0033] The present invention proposes a steel structure pillar that is convenient for welding and coating, comprising: a circular pillar 1, wherein a butt-jointing square hole 101 is provided in the middle of the upper and lower sides of the circular pillar 1, and two groups of circular pillars 1 can be connected by inserting a square pin in the butt-jointing square hole 101; four groups of limiting slide grooves 102 are provided on the outside of the circular pillar 1; a lower slide ring 2, which is slidably arranged on the outside of the circular pillar 1; four groups of receiving grooves 201 are provided on the upper inner side of the lower slide ring 2, and a trapezoidal block A203 is slidably arranged in the receiving groove 201; a gas telescopic rod C3, which is fixedly arranged in the receiving groove The inner bottom of 201; the bottom of the lower sliding ring 2 is a concave shoulder structure; the gas telescopic rod D4, the gas telescopic rod D4 is fixedly arranged at the bottom of the lower sliding ring 2; the gas telescopic rod C3 is connected to the gas telescopic rod D4; the annular channel 5, the annular channel 5 is fixedly arranged at the bottom of the lower sliding ring 2; the baffle valve 6, the baffle valve 6 is slidably arranged between the outer side of the annular channel 5 and the inner wall below the outer side of the lower sliding ring 2; the limit slider 7, the limit slider 7 is slidably arranged at the inner middle position of the lower sliding ring 2; the upper sliding ring 8, the upper sliding ring 8 is slidably arranged on the outside of the circular pillar 1, and the upper sliding ring 8 is composed of two groups of semicircular rings spliced ​​together.

[0034] Among them, the lower sliding ring 2 also includes: a spring rod A202, a spring rod A202 is fixedly arranged on the upper inner side of the limiting slide groove 102, the spring rod A202 is sleeved with a spring and passes through the trapezoidal block A203 and is fixedly provided with a baffle; a gas telescopic rod A204, a gas telescopic rod A204 is fixedly arranged at the bottom of the trapezoidal block A203; a gas telescopic rod B205, a gas telescopic rod B205 is fixedly arranged at the lower side of the trapezoidal block A203 close to the lower sliding ring 2, and the gas telescopic rod B205 and the gas The telescopic rod A204 is connected; a sliding push block 206, a sliding push block 206 is fixedly provided on the telescopic end of the gas telescopic rod B205; a guide plate 207, a guide plate 207 is fixedly provided in a groove in the middle of the inner side of the lower sliding ring 2 for accommodating the limit sliding block 7; a pushing screw 208, four groups of pushing screws 208 are provided in the middle of the outer side of the lower sliding ring 2; a docking ear 209, four groups of docking ears 209 are integrally provided on the outer bottom of the lower sliding ring 2, and a through hole is opened in the middle of the docking ear 209.

[0035] The gas telescopic rod C3 includes a sliding pressing block 301 , a sliding pressing block 301 is fixedly provided at the telescopic end of the gas telescopic rod C3 , and a spring is provided on the outer sleeve of the telescopic end of the gas telescopic rod C3 .

[0036] The gas telescopic rod D4 includes an extrusion piston ring 401 . The bottom telescopic end of the gas telescopic rod D4 is fixedly provided with the extrusion piston ring 401 . The extrusion piston ring 401 is slidably arranged in the annular channel 5 .

[0037] Among them, the annular channel 5 includes: a partition 501, which is integrally arranged on the inner bottom of the annular channel 5; an opening structure is arranged at the outer bottom of the annular channel 5, and the edge of the opening structure and the partition 501 are both in contact with the stop valve 6; a discharge hole 502, which is arranged at the bottom of the annular channel 5; and a threaded plug 503, which is fixedly arranged on the inner wall of the annular channel 5.

[0038] Among them, the retaining valve 6 includes: a semicircular annular groove 601, a semicircular annular groove 601 is opened on the lower inner side of the retaining valve 6; a push rod 602, a push rod 602 is fixedly arranged at the bottom of the retaining valve 6, and the bottom of the push rod 602 passes through the lower sliding ring 2; a spring is arranged on the top of the retaining valve 6; when the lower sliding ring 2 and the upper sliding ring 8 are fitted together, the push rod 602 is squeezed to lift the retaining valve 6, and the semicircular annular groove 601 rises to connect the upper and lower spaces of the partition 501; the gas telescopic rod A204 is squeezed and contracted by the inner wall below the restricted sliding groove 102, and the air in the gas telescopic rod A204 is input into the gas telescopic rod B205, and the gas telescopic rod B205 is used to press the gas telescopic rod C3 downward, and the air in the gas telescopic rod C3 is input into the gas telescopic rod D4, and the gas telescopic rod D4 is stretched to drive the extrusion piston ring 401 to descend, and the paint in the annular channel 5 is discharged from the discharge hole 502 through the semicircular annular groove 601 to coat the welding area.

[0039] The limiting slider 7 includes: a spring rod B701, two groups of spring rods B701 are fixedly arranged on the outside of the limiting slider 7, and the spring rods B701 pass through the guide piece 207 to be sleeved with a spring and fixedly arranged with a blocking piece.

[0040] Among them, the upper slip ring 8 includes: snap-in ears 801, four groups of snap-in ears 801 are integrally arranged on the top of the outer side of the upper slip ring 8; trapezoidal blocks B802, four groups of trapezoidal blocks B802 are slidably arranged on the inner side of the upper slip ring 8; a rotating rod 803, a rotating rod 803 is rotatably arranged on the lower outer side of the upper slip ring 8, the trapezoidal blocks B802 are slidably arranged outside the rotating rod 803, and a spring is arranged on the outside of the rotating rod 803; a turn buckle 804, a turn buckle 804 is fixedly arranged on the outer end of the rotating rod 803; and a convex pile 805, four groups of convex piles 805 are fixedly arranged on the outer side of the upper slip ring 8.

[0041] Among them, four groups of buckle frames 9 are arranged on the outside of the docking ear 209 and the snap-on ear 801, and the buckle frame 9 includes: a gas telescopic rod E901, a gas telescopic rod E901 is fixedly arranged on the top of the buckle frame 9, a pushing block 902 is fixedly arranged on the telescopic end of the buckle frame 9 through the buckle frame 9, and a docking pile 903 is integrally arranged at the bottom of the pushing block 902; an air pipe 904, the top of the four groups of gas telescopic rods E901 are connected to the air pipe 904, and one end of the air pipe 904 is set as a three-way structure and connected to the There are an air release valve 905 and an air pump 906; the docking pile 903 is locked in the docking ear 209, the docking ear 209 and the snap-on ear 801 are wrapped with the buckle frame 9, and the air pump 906 is started to inflate the interior of the gas telescopic rod E901, and the gas telescopic rod E901 is stretched by increasing the pressure, thereby locking the upper and lower docking ears 209 and the snap-on ear 801, and at the same time, the lower slide ring 2 and the upper slide ring 8 are fitted together; the air release valve 905 can be opened to discharge the gas in the gas telescopic rod E901, and the snap-on frame 9 is manually removed.

[0042] Specific usage and function of this embodiment: In the present invention, the lower sliding ring 2 and the upper sliding ring 8 are pre-mounted on the outside of the circular pillar 1, and then the circular pillar 1 is connected, and the upper and lower circular pillars 1 are connected by inserting a square pin in the docking square hole 101; the limiting slider 7, the trapezoidal block A203 and the trapezoidal block B802 slide in the limiting slide groove 102;

[0043] The lower slide ring 2 is carried by the limit slider 7, so that the connection between the upper and lower sets of circular pillars 1 can be kept exposed and can be welded;

[0044] After welding is completed, the push screw 208 is rotated outward, the limit slider 7 automatically shrinks in cooperation with the spring rod B701, the limit slider 7 is separated from the limit slide groove 102, and then the lower sliding ring 2 and the upper sliding ring 8 on the upper and lower sides are moved to the outside of the connection between the two sets of circular pillars 1, the docking pile 903 is locked in the docking ear 209, the docking ear 209 and the clamping ear 801 are wrapped with the buckle frame 9, and the air pump 906 is started to inflate the inside of the gas telescopic rod E901, and the gas telescopic rod E901 is stretched by increasing the pressure, thereby locking the upper and lower docking ears 209 and the clamping ears 801, and at the same time, the lower sliding ring 2 and the upper sliding ring 8 are fitted;

[0045] When the lower sliding ring 2 and the upper sliding ring 8 are fitted, the extrusion push rod 602 lifts the stop valve 6, and the semicircular annular groove 601 rises, connecting the upper and lower spaces of the partition 501; the gas telescopic rod A204 is squeezed and contracted by the inner wall below the restricted sliding groove 102, and the air in the gas telescopic rod A204 is input into the gas telescopic rod B205, and the gas telescopic rod B205 is used to press the gas telescopic rod C3 downward, and the air in the gas telescopic rod C3 is input into the gas telescopic rod D4, and the gas telescopic rod D4 is opened to drive the extrusion piston ring 401 to descend, and the paint in the annular channel 5 is discharged from the discharge hole 502 through the semicircular annular groove 601 to coat the welding area;

[0046] After the paint solidifies, the lower sliding ring 2 and the upper sliding ring 8 can be disassembled, the turn buckle 804 can be pulled outward, and then the turn buckle 804 can be rotated to buckle on the outside of the convex pile 805, and the trapezoidal block B802 can be pulled out of the limiting slide groove 102, and the upper sliding ring 8 can be rotated. The paint is separated from the upper sliding ring 8 by rotating the upper sliding ring 8, and then the upper sliding ring 8 can be disassembled; the lower sliding ring 2 can be directly slid out from the top of the circular pillar 1, which is convenient for reuse; the threaded plug 503 can be removed to replenish the paint; the air release valve 905 can be opened to exhaust the gas in the telescopic rod E901, and the buckle frame 9 can be manually removed.

Claims

1. A steel structure pillar that is convenient for welding and coating, characterized in that: include: A circular pillar (1), wherein a docking square hole (101) is provided in the middle of the upper and lower sides of the circular pillar (1), and two groups of circular pillars (1) can be connected by inserting a square pin in the docking square hole (101); four groups of limiting sliding grooves (102) are provided on the outside of the circular pillar (1); a lower slide ring (2), wherein the lower slide ring (2) is slidably arranged on the outside of the circular pillar (1); four groups of receiving grooves (201) are provided on the upper inner side of the lower slide ring (2), and a trapezoidal block A (203) is slidably arranged in the receiving groove (201); a gas telescopic rod C (3), wherein the gas telescopic rod C (3) is fixedly arranged on the inner bottom of the receiving groove (201); the bottom of the lower slide ring (2) The invention discloses a concave shoulder structure; a gas telescopic rod D (4), the gas telescopic rod D (4) being fixedly arranged at the bottom of the lower sliding ring (2); a gas telescopic rod C (3) being connected to the gas telescopic rod D (4); an annular channel (5), the annular channel (5) being fixedly arranged at the bottom of the lower sliding ring (2); a stop valve (6), the stop valve (6) being slidably arranged between the outer side of the annular channel (5) and the inner wall below the outer side of the lower sliding ring (2); a limit slider (7), the limit slider (7) being slidably arranged at the middle position of the inner side of the lower sliding ring (2); and an upper sliding ring (8), the upper sliding ring (8) being slidably arranged outside the circular pillar (1), and the upper sliding ring (8) being composed of two groups of semicircular rings spliced ​​together.

2. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The lower slide ring (2) further comprises: a spring rod A (202), the spring rod A (202) being fixedly arranged on the upper inner side of the limiting slide groove (102), the spring rod A (202) being sleeved with a spring and passing through a trapezoidal block A (203) and being fixedly arranged with a baffle; a gas telescopic rod A (204), the gas telescopic rod A (204) being fixedly arranged on the bottom of the trapezoidal block A (203); and a gas telescopic rod B (205), the gas telescopic rod B (205) being fixedly arranged on the lower side of the trapezoidal block A (203) close to the lower slide ring (2), the gas telescopic rod B (205) and the gas telescopic rod A (204) being fixedly arranged on the bottom of the trapezoidal block A (203) close to the lower slide ring (2), the gas telescopic rod B (205) and the gas telescopic rod A (204) being fixedly arranged on the bottom of the trapezoidal block A (203) close to the lower slide ring (2). The telescopic rod A (204) is connected; a sliding push block (206), the telescopic end of the gas telescopic rod B (205) is fixedly provided with a sliding push block (206); a guide piece (207), a guide piece (207) is fixedly provided in a groove in the middle of the inner side of the lower lower ring (2) for accommodating the limit slider (7); a propulsion screw (208), four groups of propulsion screws (208) are provided in the middle of the outer side of the lower lower ring (2); a docking ear (209), four groups of docking ears (209) are integrally provided at the bottom of the outer side of the lower lower ring (2), and a through hole is opened in the middle of the docking ear (209).

3. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The gas telescopic rod C (3) comprises a sliding pressure block (301), the telescopic end of the gas telescopic rod C (3) is fixedly provided with the sliding pressure block (301), and the outer sleeve of the telescopic end of the gas telescopic rod C (3) is provided with a spring.

4. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The gas telescopic rod D (4) comprises an extrusion piston ring (401). The bottom telescopic end of the gas telescopic rod D (4) is fixedly provided with an extrusion piston ring (401), and the extrusion piston ring (401) is slidably arranged in the annular channel (5).

5. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The annular channel (5) comprises: a partition (501), the inner bottom of the annular channel (5) being integrally provided with the partition (501); an opening structure at the outer bottom of the annular channel (5), the opening structure and the edge of the partition (501) both being in contact with the stop valve (6); a discharge hole (502), the bottom of the annular channel (5) being provided with the discharge hole (502); and a threaded plug (503), the inner wall of the annular channel (5) being fixedly provided with the threaded plug (503).

6. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The retaining valve (6) comprises: a semicircular annular groove (601), the semicircular annular groove (601) being provided at the inner lower side of the retaining valve (6); a push rod (602), the bottom of the retaining valve (6) being fixedly provided with the push rod (602), the bottom of the push rod (602) passing through the lower sliding ring (2); and a spring being provided at the top of the retaining valve (6).

7. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The limiting slider (7) comprises a spring rod B (701). Two groups of spring rods B (701) are fixedly arranged outside the limiting slider (7). The spring rods B (701) pass through the guide plate (207), are sleeved with springs and are fixedly provided with blocking plates.

8. A steel structure pillar that is convenient for welding and coating as claimed in claim 1, characterized in that: The upper sliding ring (8) comprises: a snap-on ear (801), four groups of snap-on ears (801) are integrally arranged on the top of the outer side of the upper sliding ring (8); a trapezoidal block B (802), four groups of trapezoidal blocks B (802) are slidably arranged on the inner side of the upper sliding ring (8); a rotating rod (803), a rotating rod (803) is rotatably arranged on the lower side of the outer side of the upper sliding ring (8), the trapezoidal block B (802) is slidably arranged outside the rotating rod (803), and a spring is arranged outside the rotating rod (803); a rotating buckle (804), a rotating buckle (804) is fixedly arranged on the outer end of the rotating rod (803); and a convex pile (805), four groups of convex piles (805) are fixedly arranged on the outer side of the upper sliding ring (8).

9. A steel structure pillar that is convenient for welding and coating as claimed in claim 2, characterized in that: Four groups of buckle frames (9) are arranged outside the docking ears (209) and the snap-on ears (801), and the buckle frames (9) include: a gas telescopic rod E (901), a gas telescopic rod E (901) is fixedly arranged on the top of the buckle frame (9), a push block (902) is fixedly arranged at the telescopic end of the buckle frame (9) through the buckle frame (9), and a docking pile (903) is integrally arranged at the bottom of the push block (902); and an air pipe (904), the tops of the four groups of gas telescopic rods E (901) are connected to the air pipe (904), and one end of the air pipe (904) is arranged as a three-way structure and is connected to a deflation valve (905) and an air pump (906).

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