Rapid heat preservation device and heat preservation method after welding of tubular column

Abstract

The invention relates to a rapid heat preservation device and method for a welded tubular column, and the device comprises an outer positioning ring which is enclosed to form a circle with the adjustable size; the inner fixing ring is arranged on the inner side of the outer positioning ring, and the size of a circle defined by the inner fixing ring can be adjusted to be matched with the size of the tubular column; the connecting pieces are supported and connected between the outer positioning ring and the inner fixing ring, the length of the connecting pieces is adjustable, and the connecting pieces are arranged on the inner ring surface of the outer positioning ring at intervals; the heat preservation layer is arranged on the inner side face of the inner fixing ring, is annular and is matched with the tubular column in size. The heat preservation device is clear in installation sequence, easy and fast to install, firm in structure, resistant to collision and capable of being repeatedly used, construction quality is guaranteed, and meanwhile labor cost and time cost are greatly saved.

Description

Technical Field

[0001] The invention relates to the technical field of heat preservation devices, and in particular to a quick heat preservation device and a heat preservation method for a round pipe column after welding. Background Art

[0002] With the continuous growth of my country's economy, airport construction has developed rapidly in recent years. In this process, the innovation of steel structure welding construction methods has provided strong technical support for airport construction. In welding construction, post-weld insulation technology is a crucial link.

[0003] The main purpose of post-weld insulation technology is to ensure the quality of welded joints, prevent welding deformation and stress, and reduce the temperature gradient in the welding area. At present, in the winter construction market, post-weld insulation treatment is basically done by manual on-site binding, which consumes a lot of manpower, material resources, and time, and also needs to consider the influence of weather. During the process, a lot of temperature will be lost quickly, resulting in uneven heat dissipation in the weld and concentrated stress. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a rapid insulation device and insulation method for a circular pipe column after welding, so as to solve the problem that a large amount of temperature will be lost rapidly during the manual on-site binding process of the existing weld insulation, resulting in uneven heat dissipation of the weld and thus generating concentrated stress.

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides a device for quickly keeping warm after welding a round pipe column, comprising:

[0007] An outer positioning ring, wherein the size of the circle formed by the outer positioning ring is adjustable;

[0008] An inner fixing ring is arranged inside the outer positioning ring, and the size of the circle formed by the inner fixing ring can be adjusted to fit the size of the round tube column;

[0009] A connecting piece supported and connected between the outer positioning ring and the inner fixing ring, wherein the length of the connecting piece is adjustable, and there are a plurality of connecting pieces, which are arranged at intervals on the inner ring surface of the outer positioning ring;

[0010] The heat-insulating layer is arranged on the inner side surface of the inner fixing ring, and the heat-insulating layer is ring-shaped and matched with the size of the circular tube column.

[0011] A further improvement of the rapid heat preservation device after welding of a circular tube column of the present invention is that the outer positioning ring includes a first arc plate and a second arc plate which are arranged opposite to each other, and the opposite ends of the first arc plate and the second arc plate are rotatably connected by a pin shaft, and the other opposite ends are adjustably connected by an adjustable lock, and the size of the circle formed by the outer positioning ring can be adjusted by adjusting the distance at the other opposite ends of the first arc plate and the second arc plate.

[0012] A further improvement of the device for rapid heat preservation after welding of a circular tube column of the present invention is that the inner fixing ring comprises a first semicircular plate and a second semicircular plate which are arranged opposite to each other.

[0013] A further improvement of the quick heat preservation device after welding of a round tube column of the present invention is that the connecting piece comprises a connecting sleeve connected to the inner ring surface of the outer positioning ring and a connecting pin connected to the outer side surface of the inner fixing ring, and the end of the connecting pin is provided with a pressable elastic clamping protrusion;

[0014] The connecting sleeve is provided with a plurality of connecting holes at intervals, and the connecting sleeve is sleeved on the connecting pin. The length of the connecting piece can be adjusted by the elastic cam being clamped on the corresponding connecting hole.

[0015] A further improvement of the device for rapid heat preservation after welding of a circular tube column of the present invention is that the width of the heat preservation layer is adapted to the width of the inner fixing ring.

[0016] The present invention also provides a method for heat preservation of welds by using a quick heat preservation device after welding of a round pipe column, comprising the following steps:

[0017] Adjust the length of the connecting piece according to the size of the circular tube column;

[0018] A thermal insulation layer adapted to the size of the circular tube column is prepared, and the thermal insulation layer is fixedly connected to the inner side surface of the inner fixing ring;

[0019] After the round pipe column is welded, the heat-insulating device is clamped on the weld, and then the outer positioning ring is tightened to make the heat-insulating layer close to the weld, thereby completing the heat insulation of the weld.

[0020] A further improvement of the method for heat insulation of welds using the rapid heat insulation device after welding of a round pipe column of the present invention is that the outer positioning ring comprises a first arc plate and a second arc plate rotatably connected at one end, and an adjustable lock buckle is provided at the other end of the first arc plate and the second arc plate;

[0021] When inserting the insulation device, separate the other end of the first arc plate and the second arc plate to open the outer positioning ring, insert the outer positioning ring onto the circular tube column, and then let the insulation layer face the weld, and then adjust the lock buckle to tighten the other end of the first arc plate and the second arc plate.

[0022] A further improvement of the method for heat preservation of welds by using a rapid heat preservation device after welding of a round pipe column according to the present invention is that a fixing piece is arranged on the inner side surface of the inner fixing ring;

[0023] When fixing the heat-insulating layer, the heat-insulating layer is fixedly connected to the fixing member, thereby fixing the heat-insulating layer on the inner fixing ring.

[0024] A further improvement of the method for heat insulation of welds by using a quick heat insulation device after welding of a round pipe column according to the present invention is that the connecting piece comprises a connecting sleeve connected to the inner ring surface of the outer positioning ring and a connecting pin connected to the outer side surface of the inner fixing ring, the end of the connecting pin is provided with a pressable elastic clamping protrusion, a plurality of connecting holes are arranged at intervals on the connecting sleeve, and the connecting sleeve is sleeved on the connecting pin;

[0025] When adjusting the length of the connecting piece, press the elastic latch downward, then pull outward or push the connecting pin inward so that the connecting pin can partially extend outward from the connecting sleeve or retract inward, thereby adjusting the length of the connecting piece. After the length is adjusted, the elastic latch can automatically snap into the corresponding connecting hole.

[0026] A further improvement of the method for heat insulating the weld using the rapid heat insulating device after welding of a circular pipe column according to the present invention is that the width of the heat insulating layer is adapted to the width of the inner fixing ring.

[0027] The beneficial effects of the quick heat preservation device and heat preservation method for round pipe column after welding of the present invention are as follows:

[0028] The thermal insulation device of the present invention can effectively control the cooling rate of the welding joint, so that the heat generated during the welding process can be dissipated more evenly, avoiding the shrinkage and stress concentration problems caused by local rapid cooling. While achieving efficient construction, it also greatly reduces labor costs and time costs, reduces costs and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an axonometric view of the rapid heat preservation device after welding of a circular tube column according to the present invention at a first viewing angle.

[0030] Figure 2 It is an axonometric view of the rapid heat preservation device after welding of the circular tube column of the present invention at a second viewing angle.

[0031] Figure 3This is a model diagram of the rapid heat preservation device after welding of the circular tube column of the present invention.

[0032] Figure 4 for Figure 3 A schematic diagram of the structure of a portion of the model diagram shown.

[0033] Figure 5 It is a top view of the rapid heat preservation device after the circular pipe column is welded according to the present invention.

[0034] Figure 6 It is a schematic diagram of the structure of the pin shaft in the rapid heat preservation device after the round tube column is welded according to the present invention.

[0035] Figure 7 It is a schematic diagram of the structure of the connecting parts in the rapid heat preservation device after the round tube column is welded according to the present invention.

[0036] Figure 8 It is a schematic structural diagram of a portion of an inner fixing ring in a rapid heat preservation device after welding of a circular tube column according to the present invention.

[0037] Fig. 9 It is a schematic structural diagram of an adjustable lock in the rapid heat preservation device after welding of a circular tube column of the present invention.

[0038] Fig.10 The present invention is a flow chart of a method for insulating welds by using a rapid heat-insulating device after welding a circular pipe column. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] See also Figure 1 The present invention provides a quick heat preservation device and heat preservation method for circular pipe columns after welding. The heat preservation device can be installed on site after prefabrication according to the size of the circular pipe column, and then directly installed and used. The connection is achieved by using an adjustable lock hole, which not only improves the installation speed, but also reduces the consumption of manpower, and has a good appearance effect. It can more efficiently and simply complete the weld insulation in low temperature weather in winter, greatly reducing labor costs and time costs, and improving work efficiency. The quick heat preservation device and heat preservation method for circular pipe columns after welding of the present invention are described below in conjunction with the accompanying drawings.

[0041] See also Figure 1 , showing the axonometric view of the rapid heat preservation device for circular pipe column after welding of the present invention at the first viewing angle. Figure 2 , shows the axonometric view of the rapid heat preservation device for circular pipe column after welding of the present invention at a second viewing angle. Figure 1 and Figure 2 , the rapid heat preservation device after welding of the circular tube column of the present invention is described.

[0042] like Figure 1 and Figure 2 As shown, the device for quickly keeping warm after welding a round pipe column of the present invention comprises an outer positioning ring 21, an inner fixing ring 22, a connecting piece 23 and a heat-insulating layer 24; the size of the circle formed by the outer positioning ring is adjustable, the inner fixing ring 22 is arranged on the inner side of the outer positioning ring 21, and the size of the circle formed by the inner fixing ring 22 can also be adjusted to adapt to the size of the round pipe column; there are multiple connecting pieces 23, the connecting pieces 23 are supported and connected between the outer positioning ring 21 and the inner fixing ring 22, the length of the connecting piece 23 is adjustable, the multiple connecting pieces 23 are arranged at intervals on the inner slow 211 of the outer positioning ring 21, and the length adjustment of the connecting piece 23 is used to adapt to the size adjustment of the outer positioning ring 21 and the inner fixing ring 22. The heat-insulating layer 24 is arranged on the inner side surface of the inner fixing ring 22, the heat-insulating layer is annular and adapted to the size of the round pipe column, and the heat-insulating layer 24 is used to stick to the weld of the round pipe column to achieve heat insulation of the weld.

[0043] The inner fixing ring 22 in the thermal insulation device of the present invention is fixed to the inner side of the outer positioning ring 21 through the connecting piece 23. The length of the connecting piece 23 is first connected according to the size of the circular tube column to be fixed. After adjustment, the size of the outer positioning ring 21 is adjusted so that the size of the inner fixing ring 22 is also adjusted. After adjustment, the thermal insulation layer 24 can be clamped on the circular tube column through the outer positioning ring 21 and the inner fixing ring 22 to achieve thermal insulation of the weld on the circular tube column.

[0044] In a specific embodiment of the present invention, Figures 1 to 3 and Fig. 9 As shown, the outer positioning ring 21 includes a first arc plate 212 and a second arc plate 213 arranged opposite to each other. Figure 6 As shown, one opposite end of the first arc plate 212 and the second arc plate 213 are rotatably connected via a pin shaft 25, and the other opposite end is adjustably connected via an adjustable lock 26. By adjusting the distance between the other opposite ends of the first arc plate 212 and the second arc plate 213, the size of the circle formed by the outer positioning ring 21 can be adjusted.

[0045] Preferably, the first curved plate 212 and the second curved plate 213 are semicircular plates, and the two ends of the first curved plate 212 and the second curved plate 213 can form a circle with the smallest size after being butted together. There is a certain gap between the first curved plate 212 and the second curved plate 213 at one end where an adjustable lock buckle 26 is set, and the size of the gap can be changed to adjust the size of the circle formed by the outer positioning ring 21.

[0046] Furthermore, the adjustable lock buckle 26 includes a lock head 262, an adjustment belt 261 and a buckle 263. The lock head 262 is arranged at the end of the second arc plate 213. One end of the adjustment belt 261 is fixedly connected to the end of the first arc plate 212. The adjustment belt 261 is provided with a plurality of connecting teeth, which are arranged in an inclined shape. The lock head 262 is provided with a bite tooth that meshes with the connecting tooth. When connecting, the end of the adjustment belt 261 can be passed through the lock head 261, and then the adjustment belt 261 is pulled. The bite tooth and the connecting tooth mesh to prevent the adjustment belt 261 from retreating. The end of the adjustment belt 261 can pass through the buckle 263 arranged on the second arc plate 213, which not only realizes the adjustment of the size of the outer positioning ring 21, but also realizes the locking after adjustment. When it is necessary to release the connection, the lock head 262 can be pressed to separate the bite tooth from the connecting tooth, and the adjustment belt 261 can be pulled out to separate the adjustment belt 261 from the lock head 262.

[0047] In a specific embodiment of the present invention, the inner fixing ring 22 includes a first semicircular plate 221 and a second semicircular plate 222 that are arranged opposite to each other.

[0048] Preferably, when manufacturing the inner fixing ring 22 and the outer positioning ring 21, a steel plate is processed into a circular ring plate, and then separated at the midline to form two semicircular plates, the ends of the two semicircular plates of the inner fixing ring 22 are not connected, and the two semicircular plates are connected to the two semicircular plates of the outer positioning ring 21 through a connector 23. One end of the two semicircular plates of the outer positioning ring 21 is rotatably connected through a pin 25, and an adjustable lock buckle 26 is provided at the other end.

[0049] A spacing 223 is provided between the corresponding ends of the first semicircular plate 221 and the second semicircular plate 222. The different sizes of the spacing 223 result in different sizes of the inner fixing ring 22, which enables the inner fixing ring 22 to be clamped on circular pipe columns of different sizes. The size adjustment of the circular size formed by the inner fixing ring 22 is achieved by adjusting the length of the connecting piece 23. When the size of the outer positioning ring 21 remains unchanged, the length of the connecting piece 23 is adjusted to the maximum. At this time, the size of the circle formed by the inner fixing ring 22 is the smallest. At this time, the corresponding ends of the first semicircular plate 221 and the second semicircular plate 222 can be made close to each other, and the length of the connecting piece 23 is reduced, so that the first semicircular plate 221 and the second semicircular plate 222 are separated from each other, so that a spacing 223 is formed at the end, so that the size of the inner fixing ring 22 becomes larger, which can adapt to the insulation of circular pipe columns with larger diameters.

[0050] In a specific embodiment of the present invention, Figures 1 to 3 , Figure 5 and Figure 7As shown, the connecting member 23 includes a connecting sleeve 231 connected to the inner ring surface 211 of the outer positioning ring 21 and a connecting pin 232 connected to the outer side surface of the inner fixing ring 22, and the end of the connecting pin 232 is provided with a pressable elastic clamping protrusion 233; a plurality of connecting holes 234 are arranged at intervals on the connecting sleeve 231, and the connecting sleeve 231 is sleeved on the connecting pin 232, and the length of the connecting member 23 is adjusted by clamping the elastic clamping protrusion 234 on the corresponding connecting hole 234.

[0051] When adjusting the length of the connecting member 23, the elastic clamping protrusion 234 can be pressed downward, and then the connecting pin 232 can be pushed inward or pulled outward to reduce or increase the length of the connecting member 23. When the elastic clamping protrusion 234 moves to the corresponding connecting hole 234, the elastic clamping protrusion 234 will pop out and be inserted into the connecting hole 234. In this way, the size of the circle formed by the inner fixing ring 22 can be accurately adjusted by designing the length of the connecting member 23. The design quantity and design position of the connecting holes 234 match the size type of the round pipe column that needs to be insulated.

[0052] Figure 7 In the embodiment of the connecting piece shown in FIG. , four connecting holes 234 are provided, so that four sizes of inner fixing rings 22 can be provided, which can be suitable for heat preservation of four sizes of round pipe columns.

[0053] In a specific embodiment of the present invention, Figure 3 and Figure 4 As shown, the width of the thermal insulation layer 24 is matched to the width of the inner fixing ring 22 .

[0054] In this way, the inner fixing ring 22 can well reinforce the thermal insulation layer 24, so that the thermal insulation layer 24 is closely attached to the weld of the round pipe column, thereby achieving a good thermal insulation effect on the weld.

[0055] Furthermore, if Figure 8 As shown, the thermal insulation layer 24 is an asbestos layer, which can be assembled at the construction site. A fixing member 27 is provided on the inner side of the inner fixing ring 22. When installing the asbestos layer, the asbestos layer is connected to the inner fixing ring 22 through the fixing member 27. Preferably, the fixing member 27 is a hexagonal bolt. When installing the asbestos layer, the hexagonal bolt is passed through the asbestos layer to limit the asbestos layer on the inner fixing ring 22. Specifically, the hexagonal bolt can be removed first, the asbestos layer can be attached to the inner side of the inner fixing ring, and then the hexagonal bolt is passed through the asbestos layer to be connected to the inner fixing ring 22.

[0056] When the present invention is in use, the adjustable lock is opened to separate the ends of the first arc plate and the second arc plate, that is, to rotate around the pin 25 to open, and then the heat preservation device is clamped on the round tube column, and then the adjustable lock is locked, and the adjustment belt 261 is tightened to let the lock head 262 lock the adjustment belt 261, so that the first arc plate and the second arc plate can bring the two semicircular plates of the inner fixing ring close to each other, and then the asbestos layer is tightly attached to the weld of the round tube column to achieve heat preservation of the weld. Before welding the round tube column, the length of the connecting piece is adjusted in advance according to the size of the round tube column, and then a suitable heat preservation layer is selected according to the size of the round tube column, and the heat preservation layer is installed on the inner fixing ring. Then, after the round tube column is welded, the heat preservation layer can be quickly clamped on the weld to achieve heat preservation of the weld.

[0057] Since the thermal insulation layer has a certain deformation ability, when designing the size of the inner fixing ring, the size of the inner fixing ring is slightly smaller than the outer diameter of the circular tube column, or the size of the inner fixing ring is equal to the outer diameter of the circular tube column, and the thermal insulation layer also has a certain thickness. In this way, after the adjustable lock is connected, the outer fixing ring and the connecting piece can support the inner fixing ring, and the inner fixing ring tightly clamps the thermal insulation layer. The thermal insulation layer can be squeezed and tightly attached to the outer surface of the circular tube column, thereby achieving a good thermal insulation effect.

[0058] The present invention also provides a method for heat preservation of welds by using a quick heat preservation device after welding of a round pipe column, comprising the following steps:

[0059] like Fig.10 As shown, step S11 is executed to adjust the length of the connecting piece according to the size of the round tube column; then step S12 is executed;

[0060] Execute step S12, prepare a suitable insulation layer according to the size of the round tube column, and fix the insulation layer to the inner side surface of the inner fixing ring; then execute step S13;

[0061] Execute step S13, after the round pipe column is welded, clamp the insulation device on the weld, and then tighten the outer positioning ring to make the insulation layer close to the weld, thereby completing the insulation of the weld.

[0062] In a specific embodiment of the present invention, the outer positioning ring includes a first arc-shaped plate and a second arc-shaped plate rotatably connected at one end, and an adjustable lock buckle is provided at the other end of the first arc-shaped plate and the second arc-shaped plate;

[0063] When inserting the insulation device, separate the other end of the first arc plate and the second arc plate to open the outer positioning ring, insert the outer positioning ring onto the round pipe column, so that the insulation layer is opposite to the weld, and then adjust the lock buckle to tighten the other end of the first arc plate and the second arc plate.

[0064] In a specific embodiment of the present invention, a fixing member is provided on the inner side surface of the inner fixing ring;

[0065] When the thermal insulation layer is fixed, the thermal insulation layer is fixedly connected to the fixing piece, thereby achieving the thermal insulation layer being fixed on the inner fixing ring.

[0066] In a specific embodiment of the present invention, the connecting member includes a connecting sleeve connected to the inner ring surface of the outer positioning ring and a connecting pin connected to the outer side surface of the inner fixing ring, the end of the connecting pin is provided with a pressable elastic clamping protrusion, a plurality of connecting holes are arranged at intervals on the connecting sleeve, and the connecting sleeve is sleeved on the connecting pin;

[0067] When adjusting the length of the connecting piece, press the elastic protrusion downward, then pull the connecting pin outward or push it inward so that the connecting pin can partially extend outward from the connecting sleeve or retract inward, thereby adjusting the length of the connecting piece. After the length is adjusted, the elastic protrusion can automatically snap into the corresponding connecting hole.

[0068] In a specific embodiment of the present invention, the width of the thermal insulation layer is adapted to the width of the inner fixing ring.

[0069] Please refer to Figure 1 In a device for rapid heat preservation after welding of a circular pipe column of the present invention, the outer positioning ring includes two arc-shaped plates, one on each side, which are connected by a pin shaft and can be opened to any angle. The fixing is achieved by an adjustable lock to connect the inner fixing ring with the outer positioning ring. The size of the inner fixing ring can be adjusted arbitrarily according to the installation conditions. The outer opening of the outer positioning ring cooperates with the adjustable lock to adjust the size of the outer positioning ring arbitrarily to meet the size of the cylinder under any working condition. The asbestos is fixed to the inner positioning ring by a hexagonal bolt. After the asbestos is installed on site, the weld of the circular pipe column can be quickly insulated. This method achieves the goal of prefabricating the process in advance, reducing the time and labor for the installation of the on-site insulation asbestos, and improving labor efficiency.

[0070] Furthermore, the use of the quick heat preservation device after welding of a circular pipe column of the present invention is as follows: when in use, assemble in the following order: when the processing plant processes the inner fixing ring and the outer positioning ring, cut the materials according to two specifications. The outer positioning ring uses a steel plate of 7100*180*20mm to process the arc with a radius of 1130mm; the inner fixing ring uses a steel plate of 6150*180*20mm to process a specific shape and then make an arc with a radius of 980mm; the inner fixing ring and the outer positioning ring are separated from the center line, and the ends of the two parts of the outer positioning ring are connected by a pin shaft; a 14mm hole 1 is opened 25mm from the upper edge of the inner positioning ring, and a hole 2 is opened 60 downwards with hole 1 as the origin, and two identical holes are opened every 300mm along the arc; after all the hole expansions are completed, an M12*80 hexagonal bolt is installed in each hole; the outer positioning ring opening is successively installed with an adjustable lock, an adjustable buckle, and a movable opening ring, and then polished, sandblasted, painted, and transported to the site. Remove the M12*80 hexagonal bolts; press the finished asbestos Figure 4 Install it to the inner fixing ring as shown; open the outer positioning ring according to the on-site working conditions, adjust the adjustable lock buckle, make the inner fixing ring meet the size of the round steel column, and make the asbestos close to the weld. Insert the buckle at the outer opening of the outer positioning ring into the adjustable lock head, tighten the buckle, move the opening ring into the buckle, and finally make the insulation device reliably adsorbed on the round pipe column.

[0071] The invention provides a rapid heat preservation device for a circular tube column after welding, which has a clear installation sequence, is simple and quick to install, has a strong and impact-resistant structure, can be repeatedly used, and ensures construction quality while greatly saving labor costs and time costs.

[0072] The device for quickly insulating a circular tube column after welding of the present invention can be used for the insulation of circular tube columns of all steel structures after welding in industrial plants, airports, high-speed railway stations, etc., saving materials, saving energy, reducing pollution, and reducing the time for on-site installation in cold climates. The size of the fixed ring in the device can be adjusted at will according to the size of the circular tube column, solving the problems of the singleness of the post-welding insulation process and the high time consumption. This method has simple installation operation, quick installation, accuracy and efficiency, and greatly saves labor costs and time costs.

[0073] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A rapid heat preservation device for a round pipe column after welding, characterized in that: include: An outer positioning ring, wherein the size of the circle formed by the outer positioning ring is adjustable; An inner fixing ring is arranged inside the outer positioning ring, and the size of the circle formed by the inner fixing ring can be adjusted to fit the size of the round tube column; A connecting piece supported and connected between the outer positioning ring and the inner fixing ring, wherein the length of the connecting piece is adjustable, and there are a plurality of connecting pieces, which are arranged at intervals on the inner ring surface of the outer positioning ring; The heat-insulating layer is arranged on the inner side surface of the inner fixing ring, and the heat-insulating layer is ring-shaped and matched with the size of the circular tube column.

2. The device for rapid heat preservation after welding of a round pipe column according to claim 1, characterized in that: The outer positioning ring includes a first arc plate and a second arc plate that are arranged opposite to each other. The opposite ends of the first arc plate and the second arc plate are rotatably connected by a pin shaft, and the other opposite ends are adjustably connected by an adjustable lock. The size of the circle formed by the outer positioning ring can be adjusted by adjusting the distance between the other opposite ends of the first arc plate and the second arc plate.

3. The device for rapid heat preservation after welding of a circular tube column according to claim 1, characterized in that: The inner fixing ring comprises a first semicircular plate and a second semicircular plate which are arranged opposite to each other.

4. The device for rapid heat preservation after welding of a circular tube column according to claim 1, characterized in that: The connecting member comprises a connecting sleeve connected to the inner ring surface of the outer positioning ring and a connecting pin connected to the outer side surface of the inner fixing ring, and the end of the connecting pin is provided with a pressable elastic clamping protrusion; The connecting sleeve is provided with a plurality of connecting holes at intervals, and the connecting sleeve is sleeved on the connecting pin. The length of the connecting piece can be adjusted by the elastic cam being clamped on the corresponding connecting hole.

5. The device for rapid heat preservation after welding of a round pipe column according to claim 1, characterized in that: The width of the thermal insulation layer is matched with the width of the inner fixing ring.

6. A method for heat preservation of welds using the rapid heat preservation device for circular pipe columns after welding according to claim 1, characterized in that: The steps include: Adjust the length of the connecting piece according to the size of the circular tube column; A thermal insulation layer adapted to the size of the circular tube column is prepared, and the thermal insulation layer is fixedly connected to the inner side surface of the inner fixing ring; After the round pipe column is welded, the heat-insulating device is clamped on the weld, and then the outer positioning ring is tightened to make the heat-insulating layer close to the weld, thereby completing the heat insulation of the weld.

7. The method for heat preservation of welds using a rapid heat preservation device after welding of a round pipe column as claimed in claim 6, characterized in that: The outer positioning ring comprises a first arc-shaped plate and a second arc-shaped plate rotatably connected at one end, and an adjustable lock buckle is provided at the other end of the first arc-shaped plate and the second arc-shaped plate; When inserting the insulation device, separate the other end of the first arc plate and the second arc plate to open the outer positioning ring, insert the outer positioning ring onto the circular tube column, and then let the insulation layer face the weld, and then adjust the lock buckle to tighten the other end of the first arc plate and the second arc plate.

8. The method for heat preservation of welds using a rapid heat preservation device after welding of a round pipe column as claimed in claim 6, characterized in that: A fixing piece is arranged on the inner side surface of the inner fixing ring; When fixing the heat-insulating layer, the heat-insulating layer is fixedly connected to the fixing member, thereby fixing the heat-insulating layer on the inner fixing ring.

9. The method for heat preservation of welds using a rapid heat preservation device after welding of a round pipe column as claimed in claim 6, characterized in that: The connecting member comprises a connecting sleeve connected to the inner ring surface of the outer positioning ring and a connecting pin connected to the outer side surface of the inner fixing ring, the end of the connecting pin is provided with a pressable elastic clamping protrusion, a plurality of connecting holes are arranged at intervals on the connecting sleeve, and the connecting sleeve is sleeved on the connecting pin; When adjusting the length of the connecting piece, press the elastic latch downward, then pull outward or push the connecting pin inward so that the connecting pin can partially extend outward from the connecting sleeve or retract inward, thereby adjusting the length of the connecting piece. After the length is adjusted, the elastic latch can automatically snap into the corresponding connecting hole.

10. The method for heat preservation of welds using a rapid heat preservation device after welding of a round pipe column as claimed in claim 6, characterized in that: The width of the thermal insulation layer is adapted to the width of the inner fixing ring.

Images