Diameter-adjustable electric heating device

Abstract

The invention discloses a diameter-adjustable electric heating device which comprises a plurality of fixing units which are sequentially arranged to be in an arc shape, the inner surface of the arc is matched with the radial outer surface of a cylindrical workpiece to be heated, each fixing unit is in a cubic frame shape and hinged to the adjacent fixing unit, and the diameter of the cylindrical workpiece to be heated is larger than the diameter of the cylindrical workpiece to be heated. One face of each fixing unit is arranged to be an inwards-concave arc face, and the inwards-concave arc faces are matched with the inner surfaces of the arcs. A plurality of electric heaters, wherein each electric heater is arranged on the inner concave arc surface of one fixing unit; and the telescopic movable rack is used for fixing, supporting and moving a plurality of fixing units which are sequentially arranged into an arc shape. The split mounting type modular fixing units are adopted, the number of the heating fixing units hinged to one another can be increased or decreased at will according to the diameter of a to-be-heated workpiece, one face of each fixing unit is arranged to be the inwards-concave arc face so that the fixing units can present the corresponding radian, and the requirement for heating cylinder circumferential seams with different diameters is met.

Description

Technical Field

[0001] The invention relates to the technical field of electric heater devices, and in particular to an electric heater device with adjustable diameter. Background Art

[0002] In the manufacturing process of pressure vessels, due to the material and wall thickness, preheating is required before welding and dehydrogenation treatment is required after welding; when the equipment is too long, it is necessary to perform furnace heat treatment in sections, and local heat treatment is required after the segmented girth welds are welded. When the cylinder diameter is large and horizontal welding is adopted, the preheating and local heat treatment of the girth weld becomes more difficult. At present, preheating and postheating can be done by flame heating and electric heating, while local heat treatment can generally only be done by electric heating. Among them, flame heating is to arrange nozzles around the weld and use gases such as acetylene or propane to burn for heating. When using flame preheating and postheating, it is difficult to keep the temperature of the joint uniform and difficult to control accurately. The preheating effect is relatively poor and not very environmentally friendly. The use of electric heating for preheating is to connect the electric heating plate in series with iron wire, wrap the weld on the upper part of the ring weld, or arrange a section of heating plate under the ring weld for preheating. The disadvantage is that it can only heat the local range of the weld, the temperature is uneven, the operation is complicated, the preparation time and preheating time are long, and the weld deviates from the heating plate due to the axial displacement of the roller, and the position of the heating plate needs to be adjusted frequently, which is a large workload. Especially when the diameter is large, it is necessary to set up scaffolding for coordination, and it cannot be reused. Each weld needs to re-hang the heating plate and set up scaffolding, which greatly increases the manufacturing cost and safety risks. When the electric heating plate is used for post-heating or local heat treatment of the weld, the electric heating plate is first connected in series with iron wire, and then covered on the entire circle of the weld, and wrapped with insulation cotton. The main fastening measure is to wrap with iron wire, which is a large workload. During the heat treatment process, the iron wire becomes loose due to heating, so that the heating plate and the thermocouple cannot fit tightly on the weld, which seriously affects the effect of local heat treatment.

[0003] Based on this background, the present invention studies an electric heating device with adjustable diameter. Summary of the invention

[0004] The technical problem to be solved by the present invention is to propose an electric heating device with adjustable diameter in view of the deficiencies of the prior art, which solves the problem that the heating plate and the thermocouple expand due to heat during the heat treatment process and cannot fit tightly to the weld.

[0005] In order to achieve the above object, the present invention provides a diameter-adjustable electric heating device, comprising:

[0006] A plurality of fixing units are sequentially arranged in an arc shape, and the inner surface of the arc matches the radial outer surface of the cylindrical workpiece to be heated, each fixing unit is in a cubic frame shape, and is hinged with adjacent fixing units, and one side of each fixing unit is set as an inner concave arc surface, and the inner concave arc surface is adapted to the inner surface of the arc;

[0007] A plurality of electric heaters, each of which is arranged on a concave arc surface of a fixing unit;

[0008] The telescopic movable stand is used to fix, support and move a plurality of fixed units sequentially arranged in an arc shape.

[0009] The effects of the present invention are:

[0010] (1) The diameter-adjustable electric heating device proposed in the present invention adopts assembled modular fixing units for the heating part. The number of heating fixing units can be increased or decreased at will according to the diameter of the workpiece to be heated. The fixing units can be hinged to each other, and one side of each fixing unit is set as a concave arc surface to make it present a corresponding arc. The fixing units are modular, easy to operate, and easy and quick to disassemble and assemble, which is conducive to improving work efficiency.

[0011] (2) The diameter-adjustable electric heating device proposed in the present invention adopts a retractable movable stand and can be reused, which greatly facilitates the work during the pre-heating of the cylinder section.

[0012] (3) The diameter-adjustable electric heating device and the retractable movable stand proposed in the present invention are reasonably designed in structure. Under the prerequisite of ensuring safe use and preventing tipping over, the ratio of the ground contact area and height of the stand is controlled within the most reasonable range, and the stand is easy to move and adjust.

[0013] (4) In the diameter-adjustable electric heating device proposed in the present invention, the fixing units are hinged to each other through different hole positions to accurately present the required arc, so that the electric heater and the workpiece to be heated fit more closely, thereby improving the heating efficiency.

[0014] (5) The diameter-adjustable electric heating device proposed by the present invention not only meets the basic requirement of convenient disassembly and assembly when adding or removing fixed units, but also, after the bolts are tightened, the various fixed units are connected into a rigid whole, and the overall structural rigidity is greatly enhanced. At the same time, when designing the structure of the fixed unit, the function of a temporary ladder is taken into account. When it is necessary to add or remove fixed units or temporarily repair an electric heater failure, the operator can use this ladder to go up and down without the need for additional climbing equipment. This is the most prominent difference between this device and other similar tooling.

[0015] (6) The diameter-adjustable electric heating device proposed in the present invention can be set on one side or both sides of the cylinder section according to the heating temperature requirements of the workpiece, which is beneficial to the layout of the tooling environment. The site becomes standardized and tidy, and the safety level is greatly improved compared with the previous temporary bracket.

[0016] (7) The diameter-adjustable electric heating device proposed in the present invention has a height-adjustable trapezoidal stand for working under the condition that the two rolling wheels of a cylindrical workpiece are relatively close to each other, and the short side of the trapezoidal stand can enter under the cylinder section.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure of the diameter-adjustable electric heating device provided by the present invention.

[0020] Figure 2 yes Figure 1 Right view of the overall structural schematic diagram of the diameter adjustable electric heating device.

[0021] Figure 3 yes Figure 1 A top view of the overall structural schematic diagram of the diameter adjustable electric heating device.

[0022] Figure 4 It is a schematic diagram of a three-dimensional model of the diameter-adjustable electric heating device provided by the present invention.

[0023] Figure 5 A schematic diagram of the structure of a fixed unit in the diameter-adjustable electric heating device provided by the present invention.

[0024] Description of reference numerals:

[0025] 1- telescopic mobile stand, 2- fixed unit, 3- cylindrical workpiece, 4- electric heater;

[0026] 101-fixing mechanism, 102-supporting adjustment rod, 103-telescopic sleeve, 104-universal wheel;

[0027] 201-arc-shaped column, 202-supporting crossbar, 203-elastic steel plate, 204-upright column, 205-reinforced crossbeam, 206-long hinged plate, 207-fan-shaped hinged plate;

[0028] 1001 - first hinge hole, 1002 - second hinge hole, 1003 - third hinge hole, 1004 - fixed hinge hole, 1005 - arc-shaped oblong hole, 1006 - angle adjustment hole. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0030] In the present invention, unless otherwise specified, directional words such as "upper" and "lower" generally refer to the upper and lower parts of a device in normal use. Figure 1 In the drawing direction, "inside" and "outside" refer to the outline of the device. In addition, the terms "first, second, third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first, second, third" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] The present invention provides a diameter-adjustable electric heating device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, including:

[0032] A plurality of fixing units 2 are sequentially arranged in an arc shape, and the inner surface of the arc matches the radial outer surface of the cylindrical workpiece 3 to be heated. Each fixing unit 2 is in a cubic frame shape and is hinged with adjacent fixing units 2. One side of each fixing unit 2 is set as an inner concave arc surface, and the inner concave arc surface is adapted to the inner surface of the arc.

[0033] A plurality of electric heaters 4, each of which is disposed on a concave arc surface of a fixing unit 2;

[0034] The telescopic movable stand 1 is used for fixing, supporting and moving a plurality of fixing units 2 sequentially arranged in an arc shape.

[0035] In the present invention, the heating part adopts an assembled modular fixing unit 2, and the number of the heating fixing units 2 can be increased or decreased at will according to the diameter of the workpiece to be heated. The fixing units 2 can be hinged to each other, and one side of each fixing unit 2 is set as a concave arc surface to make it present a corresponding arc. The fixing unit 2 is modular, easy to operate, and easy and quick to disassemble and assemble, which is conducive to improving work efficiency.

[0036] In the present invention, a retractable movable stand 1 is adopted, which can be reused, greatly facilitating the work during the preheating of the cylinder section.

[0037] In the present invention, the retractable movable stand 1 has a reasonable structural design. Under the prerequisite of ensuring safe use and preventing tipping over, the ratio of the ground area and height of the stand is controlled within the most reasonable range, and the stand is easy to move and adjust.

[0038] Preferably, a pair of arc-shaped columns 201 and a pair of supporting cross bars 202 are provided on the concave arc surface of each fixing unit 2, and each supporting cross bar 202 is vertically connected to a pair of arc-shaped columns 201;

[0039] A pair of elastic steel plates 203 are arranged in the middle of a pair of supporting cross bars 202. Each elastic steel plate 203 is vertically connected to a pair of supporting cross bars 202. The pair of elastic steel plates 203 are used to fix an electric heater 4 and make the heater fit the radial outer surface of the cylindrical workpiece 3 to be heated.

[0040] According to a preferred embodiment of the present invention, a pair of upright columns 204 and a pair of reinforcing beams 205 are provided on the outer facades opposite to the inner concave arc surface of each fixing unit 2, and each reinforcing beam 205 is vertically connected to the pair of upright columns 204;

[0041] The reinforcing beams 205 of the plurality of fixing units 2 sequentially arranged in an arc shape are arranged as an arc-shaped ladder on the outer surface of the arc, and the ladder is used as an operating ladder for adding or removing fixing units 2 or as an inspection ladder for temporarily repairing electric heater 4 failures.

[0042] According to the present invention, one end of a pair of arc-shaped columns 201 is connected to one end of a pair of upright columns 204 through a pair of long strip hinge plates 206;

[0043] The other ends of the pair of arc-shaped columns 201 are connected to the other ends of the pair of upright columns 204 through a pair of fan-shaped hinge plates 207;

[0044] The lengths of the pair of supporting crossbars 202 and the pair of reinforcing crossbeams 205 are equal. 。

[0045] Preferably, each long strip hinge plate 206 is provided with a first hinge hole 1001, a second hinge hole 1002 and a third hinge hole 1003 in sequence;

[0046] Each fan-shaped hinge plate 207 is provided with a fixed hinge hole 1004 at the center point, an arc-shaped oblong hole 1005 in the middle, and a plurality of arc-shaped angle adjustment holes 1006 arranged at the outer arc;

[0047] The first hinge hole 1001 on an elongated hinge plate 206 of each fixed unit 2 cooperates with a fixed hinge hole 1004 of a fan-shaped hinge plate 207 of an adjacent fixed unit 2 and is connected by bolts, and is used as a rotating axis for curvature adjustment. The second hinge hole 1002 corresponds to the arc-shaped oblong hole 1005 and is connected by bolts, and is used for tightening after the curvature adjustment is completed. The third hinge hole 1003 cooperates with a plurality of arc-shaped angle adjustment holes 1006 and is connected by bolts to one of them, and is used for adjusting the curvature between adjacent fixed units 2 and fixing them.

[0048] In the present invention, the fixing units 2 are hinged to each other through different hole positions to accurately present the required arc, so that the electric heater 4 and the workpiece to be heated are more closely fitted, thereby improving the heating efficiency.

[0049] In the present invention, in addition to meeting the basic requirement of convenient disassembly and assembly when adding or removing the fixing units 2, after the bolts are tightened, the fixing units 2 are connected into a rigid whole, and the rigidity of the overall structure is greatly enhanced. At the same time, when designing the structure of the fixing units 2, the function of a temporary ladder is taken into account. When it is necessary to add or remove the fixing units 2 or temporarily repair the electric heater 4, the operator can use this ladder to go up and down without the need for additional climbing equipment. This is the most prominent difference between this device and other similar tooling.

[0050] According to the present invention, the telescopic movable stand 1 comprises a height-adjustable ladder-shaped stand, a fixing mechanism 101, and a pair of supporting adjustment rods 102;

[0051] The height-adjustable trapezoidal platform comprises a trapezoidal top surface and a trapezoidal bottom surface, and the trapezoidal top surface and the trapezoidal bottom surface are connected by a plurality of telescopic sleeves 103, and each telescopic sleeve 103 is provided with a fixing pin;

[0052] The height-adjustable trapezoidal gantry is used when the two rolling wheels of a cylindrical workpiece are relatively close to each other, and the short side of the trapezoid of the height-adjustable trapezoidal gantry can enter under the cylinder section.

[0053] In the present invention, the height-adjustable trapezoidal platform is used for enabling the short side of the trapezoidal shape of the height-adjustable trapezoidal platform to enter under the cylinder section when the two rolling wheels of the cylindrical workpiece are relatively close to each other.

[0054] According to a preferred embodiment of the present invention, a fixing mechanism 101 is provided on the short side of the trapezoid on the top surface of the ladder, and the fixing mechanism 101 is used to fix a plurality of fixing units 2 arranged in a circular arc shape, and to adjust the angle between the retractable movable platform 1 and the plurality of fixing units 2 arranged in a circular arc shape.

[0055] Preferably, a pair of support adjustment rods 102 are respectively provided on both sides of the trapezoidal long sides of the trapezoidal top surface, and the pair of support adjustment rods 102 are used to support a plurality of fixing units 2 arranged in an arc shape.

[0056] According to the present invention, each support adjustment rod 102 is a telescopic sleeve structure, and its support end is a ball head structure.

[0057] Preferably, the telescopic mobile stand 1 further includes four universal wheels 104 and a plurality of auxiliary fixing rods;

[0058] Four universal wheels 104 are respectively arranged below the short sides and long sides of the bottom surface of the height-adjustable trapezoidal platform;

[0059] A plurality of auxiliary fixing rods are arranged on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform, and the plurality of auxiliary fixing rods are used to form a triangular stable structure on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform.

[0060] In the present invention, the cylinder section can be arranged on one side or both sides according to the heating temperature requirement of the workpiece, which is beneficial to the arrangement of the tooling environment, and the site becomes standardized and tidy. Compared with the previous temporary bracket, the safety level is greatly improved.

[0061] The present invention is described in more detail below through a specific embodiment.

[0062] Example 1

[0063] This embodiment is a diameter adjustable electric heating device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, including:

[0064] A plurality of fixing units 2 are sequentially arranged in an arc shape, and the inner surface of the arc matches the radial outer surface of the cylindrical workpiece 3 to be heated. Each fixing unit 2 is in a cubic frame shape and is hinged with adjacent fixing units 2. One side of each fixing unit 2 is set as an inner concave arc surface, and the inner concave arc surface is adapted to the inner surface of the arc.

[0065] A plurality of electric heaters 4, each of which is disposed on a concave arc surface of a fixing unit 2;

[0066] A retractable movable stand 1 is used to fix, support and move a plurality of fixing units 2 sequentially arranged in an arc shape;

[0067] A pair of arc-shaped columns 201 and a pair of supporting cross bars 202 are arranged on the concave arc surface of each fixing unit 2, and each supporting cross bar 202 is vertically connected to a pair of arc-shaped columns 201;

[0068] A pair of elastic steel plates 203 are arranged in the middle of the pair of supporting cross bars 202, each elastic steel plate 203 is vertically connected to the pair of supporting cross bars 202, and the pair of elastic steel plates 203 are used to fix an electric heater 4, and make the heater fit the radial outer surface of the cylindrical workpiece 3 to be heated;

[0069] A pair of upright posts 204 and a pair of reinforcing beams 205 are disposed on the outer facades opposite to the inner concave arc surface of each fixing unit 2, and each reinforcing beam 205 is vertically connected to the pair of upright posts 204;

[0070] The reinforcing beams 205 of the plurality of fixing units 2 sequentially arranged in an arc shape are arranged as an arc-shaped ladder on the outer surface of the arc, and the ladder is used as an operating ladder for adding or removing fixing units 2 or a maintenance ladder for temporarily repairing a fault in the electric heater 4;

[0071] One end of a pair of arc-shaped columns 201 is connected to one end of a pair of upright columns 204 through a pair of long strip hinge plates 206;

[0072] The other ends of the pair of arc-shaped columns 201 are connected to the other ends of the pair of upright columns 204 through a pair of fan-shaped hinge plates 207;

[0073] The lengths of the pair of supporting crossbars 202 and the pair of reinforcing crossbeams 205 are equal. ；

[0074] Each long strip hinge plate 206 is provided with a first hinge hole 1001, a second hinge hole 1002 and a third hinge hole 1003 in sequence;

[0075] Each fan-shaped hinge plate 207 is provided with a fixed hinge hole 1004 at the center point, an arc-shaped oblong hole 1005 in the middle, and a plurality of arc-shaped angle adjustment holes 1006 arranged at the outer arc;

[0076] The first hinge hole 1001 on a long strip hinge plate 206 of each fixing unit 2 is matched with a fixed hinge hole 1004 of a fan-shaped hinge plate 207 of an adjacent fixing unit 2 and connected by bolts, and is used as a rotation axis for curvature adjustment. The second hinge hole 1002 is matched with an arc-shaped long circular hole 1005 and connected by bolts, and is used for fastening after the curvature adjustment is completed. The third hinge hole 1003 is matched with a plurality of arc-shaped angle adjustment holes 1006 and is connected by bolts to one of them, and is used for adjusting the curvature between adjacent fixing units 2 and fixing.

[0077] The telescopic movable platform 1 comprises a height-adjustable trapezoidal platform, a fixing mechanism 101, and a pair of supporting adjustment rods 102;

[0078] The height-adjustable trapezoidal platform comprises a trapezoidal top surface and a trapezoidal bottom surface, and the trapezoidal top surface and the trapezoidal bottom surface are connected by a plurality of telescopic sleeves 103, and each telescopic sleeve 103 is provided with a fixing pin;

[0079] The height-adjustable trapezoidal gantry is used when the two rolling wheels of a cylindrical workpiece are relatively close to each other, and the short side of the trapezoidal gantry can enter under the cylinder section;

[0080] A fixing mechanism 101 is provided on the short side of the trapezoid of the ladder top surface, and the fixing mechanism 101 is used to fix the plurality of fixing units 2 arranged in a circular arc shape, and is used to adjust the angle between the telescopic movable platform 1 and the plurality of fixing units 2 arranged in a circular arc shape;

[0081] A pair of support adjustment rods 102 are respectively arranged on both sides of the long sides of the trapezoidal top surface, and the pair of support adjustment rods 102 are used to support a plurality of fixing units 2 arranged in an arc shape;

[0082] Each support adjustment rod 102 is a retractable sleeve structure, and its support end is a ball head structure;

[0083] The telescopic mobile stand 1 also includes four universal wheels 104 and a plurality of auxiliary fixing rods;

[0084] Four universal wheels 104 are respectively arranged below the short sides and long sides of the bottom surface of the height-adjustable trapezoidal platform;

[0085] A plurality of auxiliary fixing rods are arranged on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform, and the plurality of auxiliary fixing rods are used to form a triangular stable structure on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform.

[0086] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A diameter-adjustable electric heating device, characterized in that: include: A plurality of fixing units are sequentially arranged in an arc shape, and the inner surface of the arc matches the radial outer surface of the cylindrical workpiece to be heated, each fixing unit is in a cubic frame shape, and is hinged with adjacent fixing units, and one side of each fixing unit is set as an inner concave arc surface, and the inner concave arc surface is adapted to the inner surface of the arc; A plurality of electric heaters, each of which is arranged on a concave arc surface of a fixing unit; The telescopic movable stand is used to fix, support and move a plurality of fixed units sequentially arranged in an arc shape.

2. The device according to claim 1, characterized in that A pair of arc-shaped columns and a pair of supporting cross bars are arranged on the inner concave arc surface of each fixing unit, and each supporting cross bar is vertically connected to the pair of arc-shaped columns; A pair of elastic steel plates are arranged in the middle of the pair of supporting cross bars, each elastic steel plate is vertically connected to the pair of supporting cross bars, and the pair of elastic steel plates are used to fix an electric heater and make the heater fit the radial outer surface of the cylindrical workpiece to be heated.

3. The device according to claim 2, characterized in that A pair of upright columns and a pair of reinforcing beams are arranged on the outer facade opposite to the inner concave arc surface of each fixing unit, and each reinforcing beam is vertically connected to the pair of upright columns; The reinforcing beams of the plurality of fixing units sequentially arranged in an arc shape are arranged on the outer surface of the arc to form an arc-shaped ladder, which is used as an operating ladder for adding or removing fixing units or a maintenance ladder for temporarily repairing electric heater failures.

4. The device according to claim 3, characterized in that One end of the pair of arc-shaped columns is connected to one end of the pair of upright columns through a pair of long strip hinged plates; The other ends of the pair of arc-shaped columns are connected to the other ends of the pair of upright columns through a pair of fan-shaped hinged plates; The lengths of the pair of supporting crossbars and the pair of reinforcing crossbeams are equal 。 5. The device according to claim 4, characterized in that Each long strip hinge plate is provided with a first hinge hole, a second hinge hole and a third hinge hole in sequence; A fixed hinge hole is arranged at the center point of each fan-shaped hinge plate, an arc-shaped oblong hole is arranged in the middle, and a plurality of arc-shaped angle adjustment holes are arranged at the outer arc; The first hinge hole on an elongated hinge plate of each fixed unit cooperates with a fixed hinge hole of a fan-shaped hinge plate of an adjacent fixed unit and is connected by bolts, and is used as a rotating axis for curvature adjustment. The second hinge hole corresponds to the arc-shaped oblong hole and is connected by bolts, and is used for tightening after the curvature adjustment is completed. The third hinge hole cooperates with multiple arc-shaped angle adjustment holes and is connected by bolts to one of them, and is used to adjust the curvature between adjacent fixed units and fix them.

6. The device according to claim 1, characterized in that The telescopic movable platform comprises a height-adjustable ladder-shaped platform, a fixing mechanism, and a pair of supporting adjustment rods; The height-adjustable trapezoidal platform comprises a trapezoidal top surface and a trapezoidal bottom surface, wherein the trapezoidal top surface and the trapezoidal bottom surface are connected via a plurality of telescopic sleeves, and each telescopic sleeve is provided with a fixing pin; The height-adjustable trapezoidal platform is used for working under the condition that the two rolling wheels of the cylindrical workpiece are relatively close to each other, and the short side of the trapezoid of the height-adjustable trapezoidal platform can enter under the cylinder section.

7. The device according to claim 6, characterized in that A fixing mechanism is provided on the short side of the trapezoid of the ladder top surface, and the fixing mechanism is used to fix a plurality of fixing units arranged in a circular arc shape, and is used to adjust the angle between the telescopic movable stand and the plurality of fixing units arranged in a circular arc shape.

8. The device according to claim 7, characterized in that A pair of support adjustment rods are respectively arranged on both sides of the trapezoidal long sides of the trapezoidal top surface, and the pair of support adjustment rods are used to support a plurality of fixing units arranged in an arc shape.

9. The device according to claim 8, characterized in that Each support adjustment rod is a telescopic sleeve structure, and its support end is a ball head structure.

10. The device according to claim 9, characterized in that The telescopic mobile platform also includes four universal wheels and a plurality of auxiliary fixing rods; The four universal wheels are respectively arranged below the short and long sides of the bottom surface of the height-adjustable trapezoidal platform; The multiple auxiliary fixing rods are arranged on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform, and the multiple auxiliary fixing rods are used to form a triangular stable structure on the trapezoidal top surface, the trapezoidal bottom surface and each side surface of the height-adjustable trapezoidal platform.

Images