Device for replacing tower bottom axial flow fan

Abstract

The utility model provides a device for replacement operation of a tower bottom axial flow fan. The device comprises a rectangular operating platform (1), and a first supporting rod (2) and a second supporting rod (3) which are used for supporting the rectangular operating platform, the rectangular operating platform (1) comprises a bottom plate (11), two mounting frames (12) and a plurality of rolling shafts (13); the two mounting frames (12) are fixedly arranged on the two sides of the bottom plate (11) respectively; the plurality of rolling shafts (13) are arranged on the bottom plate (11) in parallel and are detachably connected with the mounting frame (12); protective fences (14) are fixedly arranged on the two mounting frames (12) respectively; the first supporting rod (2) is fixedly arranged at the foot part of the rectangular operating platform (1), and the second supporting rod (3) is detachably connected with the first supporting rod (2); and a pulley (31) is arranged at the bottom of the second supporting rod (3). According to the device, equipment can be easily moved, the carried equipment can be stably moved to a target position, lifting is reduced, and the equipment is prevented from being damaged.

Description

Technical Field

[0001] The present application relates to the technical field of replacement operation devices, and in particular to a device for replacement operation of a tower bottom axial flow fan. Background Art

[0002] The tower bottom axial flow fan is a kind of equipment used in the ventilation system of the industrial or construction industry. It is essential to improve the air quality inside the building, reduce the temperature and remove harmful gases.

[0003] Since the axial flow fan at the bottom of the tower is large and heavy, a large amount of manpower is required to install and replace the axial flow fan at the bottom of the tower, which is time-consuming and labor-intensive.

[0004] The existing replacement operation device still requires a lot of manpower when replacing the equipment, and the equipment is easily damaged due to friction between the device and the equipment during the replacement process. Utility Model Content

[0005] The present application provides a device for replacing an axial flow fan at the bottom of a tower, so as to solve the technical problems in the prior art that the replacement of the axial flow fan at the bottom of the tower is time-consuming and labor-intensive, and the equipment is easily damaged.

[0006] The present application provides a device for replacing an axial flow fan at the bottom of a tower, the device comprising: a rectangular operating platform, four first support rods and four second support rods for supporting the rectangular operating platform;

[0007] The rectangular operating platform comprises a bottom plate, two mounting frames and a plurality of rolling shafts; the two mounting frames are respectively fixedly arranged on both sides of the bottom plate; the plurality of rolling shafts are arranged in parallel on the bottom plate and are detachably connected to the mounting frames; the two mounting frames are respectively fixedly arranged with guardrails, the two guardrails are arranged in parallel, and the guardrails are provided with a plurality of through holes;

[0008] The four first support rods are fixedly arranged on the four feet of the rectangular operating platform, and the second support rods are detachably connected to the first support rods;

[0009] A pulley is arranged at the bottom of the second support rod.

[0010] In a possible implementation manner, a fixing portion is provided at one end of the base plate, and a rotatable locking member is provided on the fixing portion, and the locking member can be rotated from a position parallel to the base plate to a position perpendicular to the base plate.

[0011] In a possible implementation manner, a gap is provided between the rolling shaft and the bottom plate; and gaps are provided between the plurality of rolling shafts.

[0012] In a possible implementation manner, the rolling shaft includes a fixed part and a rotating part;

[0013] The rotating member is sleeved on the fixed member, and the length of the fixed member is greater than the length of the rotating member;

[0014] The fixed part and the rotating part are connected by a bearing;

[0015] Two ends of the fixing member are fixedly connected to the mounting frame.

[0016] In a possible implementation manner, the second support rod and the first support rod are sleeve-connected or spirally connected.

[0017] In a possible implementation manner, the second support rod is sleeve-connected with the first support rod, the first support rod is provided with a plurality of fixing holes, and the second support rod is provided with holes corresponding to the fixing holes on the first support rod;

[0018] A positioning piece may be inserted or screwed into the fixing hole to position the height of the rectangular operating platform.

[0019] In a possible implementation manner, the second support rod is spirally connected to the first support rod;

[0020] The first support rod is provided with an internal thread; the second support rod is provided with an external thread, and the second support rod and the first support rod are spirally positioned to determine the height of the rectangular operating platform.

[0021] In a possible implementation manner, the first support rod and the second support rod are tubular structures;

[0022] Elastic components or hydraulic components are arranged in the tubular structures of the first support rod and the second support rod for adjusting the height of the rectangular operating platform.

[0023] In a possible implementation manner, the roller is disposed at the bottom of the second support rod; the roller is fixedly connected to the second support rod, and the roller can move the rectangular operating platform.

[0024] In a possible implementation manner, a steering component is further provided between the roller and the second support rod;

[0025] The steering component is detachably connected to the roller, and the steering component can drive the roller to rotate in a certain direction.

[0026] The present application provides a device for replacing an axial flow fan at the bottom of a tower. The replacement operation device includes a rectangular operation platform, four first support rods and four second support rods for supporting the rectangular operation platform; the rectangular operation platform includes a base plate, two mounting frames and multiple rolling shafts; the two mounting frames are respectively fixedly arranged on both sides of the base plate; the multiple rolling shafts are arranged in parallel on the base plate and are detachably connected to the mounting frames; guardrails are respectively fixedly arranged on the two mounting frames; the four first support rods are fixedly arranged on the four feet of the rectangular operation platform, and the second support rods are detachably connected to the first support rods; a pulley is arranged at the bottom of the second support rod. The replacement operation device provided by the present application can easily move equipment from one position to another, and can smoothly move the handling equipment to the target position, reduce actions such as lifting and placing, and can better protect the handling equipment from damage; at the same time, it can also prevent the handling equipment from falling from the device during operation, further protect the equipment, and save manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] Figure 1 A front view schematic diagram of the structure of the device for replacing the tower bottom axial flow fan provided in the present application;

[0029] Figure 2 A schematic diagram of the top view of the structure of the device for replacing the tower bottom axial flow fan provided in the present application;

[0030] Figure 3 A front view structural schematic diagram of another device for replacing an axial flow fan at the bottom of a tower provided in the present application;

[0031] Figure 4 A schematic diagram of the component structure of the device for replacing the tower bottom axial flow fan provided in this application.

[0032] Description of reference numerals:

[0033] 1—Rectangular operating platform;

[0034] 11 - bottom plate;

[0035] 12—Mounting frame;

[0036] 13 - rolling axis;

[0037] 14—Guardrail;

[0038] 15—fixed part;

[0039] 16 - stopper;

[0040] 2—first support rod;

[0041] 21—positioning hole;

[0042] 3—second support rod;

[0043] 31 - roller;

[0044] 32 - steering components;

[0045] 131 - fixings;

[0046] 132—Rotating parts.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] In the description of the present application, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] Axial flow fans at the bottom of towers are a type of equipment used in ventilation systems in the industrial or construction industries. They are essential for improving the air quality inside buildings, reducing temperatures, and removing harmful gases. Because axial flow fans at the bottom of towers are large and heavy, installing and replacing them requires a lot of manpower, which is time-consuming and labor-intensive.

[0051] When replacing the equipment, the existing replacement operation device requires a large amount of manpower to move the equipment to the replacement operation device, and then the equipment on the device needs to be moved to the designated location by manpower. In addition, during the transportation process, since there is no protective protection on the device, the transported equipment is in danger of falling during the transportation process, making the equipment easily damaged.

[0052] The present application provides a tower bottom axial flow fan replacement operation device, which aims to solve the technical problems of the prior art that the tower bottom axial flow fan replacement is time-consuming and labor-intensive, and the equipment is easily damaged.

[0053] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0054] Figure 1 A schematic diagram of a tower bottom axial flow fan replacement operation device provided in an embodiment of the present application. Figure 1 As shown, the device comprises: a rectangular operating platform 1, four first supporting rods 2 and four second supporting rods 3 for supporting the rectangular operating platform;

[0055] The rectangular operating platform 1 has four corners. In order to support the rectangular operating platform 1, four first support rods 2 and four second support rods 3 are provided, wherein the first support rods 2 are provided at the four corners of the rectangular operating platform 1, so that the rectangular operating platform 1 can remain stable at a certain height.

[0056] The rectangular operating platform 1 includes a bottom plate 11, two mounting frames 12 and a plurality of rolling shafts 13; the two mounting frames 12 are fixedly arranged on both sides of the bottom plate 11; the plurality of rolling shafts 13 are arranged in parallel on the bottom plate 11 and are detachably connected to the mounting frames 12; the two mounting frames 12 are respectively fixedly arranged with guardrails 14, and the guardrails 14 are provided with a plurality of through holes;

[0057] like Figure 2 As shown, the rectangular operating platform 1 is provided with a bottom plate 11, and mounting frames 12 are fixedly provided on both sides of the bottom plate 11, and a plurality of rolling shafts 13 are provided on the mounting frames 12. The plurality of rolling shafts 13 are installed on the mounting frames 12 in parallel, and there is a certain interval between the plurality of rolling shafts 13, so that the plurality of rolling shafts 13 can be ensured to rotate independently; the plurality of rolling shafts 13 and the mounting frames 12 can be connected by a detachable connection method such as thread, bolt, ferrule or locking pin;

[0058] A guardrail 14 is also fixedly provided on the mounting frame 12. The guardrail 14 is provided on the outside of the mounting frame 12 and is used to protect the equipment being transported and replaced from falling from the mounting frame during operation, causing damage to the equipment. A plurality of through holes are provided on the guardrail 14 to ensure that the guardrail can reduce the weight of the guardrail 14 while playing a protective role, so that the device can be moved more easily. In this embodiment, there is no particular limitation on the specific number of through holes provided on the guardrail 14, the shape of the through holes, etc.

[0059] Four first support rods 2 are fixedly arranged at four feet of the rectangular operating platform 1 , and the second support rods 3 are detachably connected to the first support rods 2 ; a pulley 31 is arranged at the bottom of the second support rods 3 .

[0060] The four first support rods 2 are separately arranged at the feet of the four corners of the rectangular operating platform 1, and the first support rod 2 and the rectangular operating platform 1 are fixedly connected; one ends of the four second support rods 3 are detachably connected to the first support rod 2 by threads, ferrules, spring pins, etc., and the height of the rectangular operating platform 1 is adjusted by the first support rod 2 and the second support rod 3. For example, a hydraulic telescopic component can be set between the first support rod 2 and the second support rod 3 to adjust the height of the first support rod 2 and the second support rod 3, thereby realizing the adjustment of the height of the rectangular operating platform 1; a pulley 31 is set at the other end of the second support rod 3, and the pulley 31 can be fixedly set at the bottom of the second support rod 3, and the whole device can be slid and translated through the pulley 31.

[0061] Furthermore, a gap is provided between the rolling shaft 13 and the bottom plate 11 ; and gaps are provided between the plurality of rolling shafts 13 .

[0062] A plurality of rolling shafts 13 are arranged on the mounting plate 12, and a gap of a certain distance is provided between each rolling shaft 13 and the base plate 11, and a gap of a certain distance is also provided between the plurality of rolling shafts 12, so that the rolling shafts 12 can rotate relatively independently on the base plate 12; in the specific implementation process, the plurality of rolling shafts 12 can be used to easily translate the equipment to be replaced onto the rectangular operating platform 1, and the replacement equipment can also be easily moved from the rectangular operating platform 1 to the target position.

[0063] Furthermore, a roller 31 is disposed at the bottom of the second support rod 3 ; the roller 31 is fixedly connected to the second support rod 3 , and the roller 31 can move the rectangular operating platform 1 .

[0064] The roller 31 is disposed at the bottom of the second support rod 3 , and the roller 31 is fixedly connected to the second support rod 3 , and the rectangular operating platform 1 can be moved forward or backward at will through the roller 31 .

[0065] During the specific implementation process, the equipment to be replaced is placed on the rectangular operating platform 1, and the guardrails 14 on both sides protect the equipment from falling from the rectangular operating platform 1. The equipment is moved to the target location through the rollers 31, and the first support rod 12 and the second support rod 13 are used to adjust the height to a suitable height. The equipment is pushed on the bottom plate 11 and rolled through multiple rolling shafts 13 to move the equipment smoothly to the target position to complete the replacement operation.

[0066] The embodiment of the present application provides a device for replacing the axial flow fan at the bottom of the tower. The replacement operation device is through a rectangular operation platform, four first support rods and four second support rods for supporting the rectangular operation platform; the rectangular operation platform includes a bottom plate, two mounting frames and multiple rolling shafts; the two mounting frames are respectively fixedly arranged on both sides of the bottom plate; the multiple rolling shafts are arranged in parallel on the bottom plate and are detachably connected to the mounting frames; the two mounting frames are respectively fixedly provided with guardrails, and the guardrails are provided with multiple through holes; the four first support rods are fixedly arranged on the four feet of the rectangular operation platform, and the second support rods are detachably connected to the first support rods; the bottom of the second support rod is provided with a pulley. The replacement operation device provided by the embodiment of the present application can easily move equipment from one position to another, and can smoothly move the handling equipment to the target position, reduce the actions of lifting and placing, and can better protect the handling equipment from damage; at the same time, it can also prevent the handling equipment from falling from the device during the operation, further protect the equipment, and save manpower.

[0067] Based on the above embodiments, Figure 1 and 3 As shown, a fixing portion 15 is disposed at one end of the bottom plate 11 , and a rotatable locking member 16 is disposed on the fixing portion 15 . The locking member 16 can be rotated from a position parallel to the bottom plate 11 to a position perpendicular to the bottom plate 11 .

[0068] In order to prevent the fan from being moved to the rectangular operating platform 1 of the device and failing to reach the predetermined position or the fan being moved beyond the limit of the rectangular operating platform 1 during the process of replacing the fan, a fixing portion 15 is provided at one end of the bottom plate 11, and the fixing portion 15 is fixedly connected to one end of the bottom plate 11; a locking member 16 is also provided on the fixing portion 15, and the locking member 16 is detachably connected to the fixing portion 15, and the locking member 16 can rotate around the fixing portion 15 as an axis;

[0069] During the specific implementation process, the locking member 16 is placed in a position parallel to the bottom of the base plate 11. Before the fan is moved to the rectangular operating platform 1, the locking member 16 is rotated to the upper end of the base plate 11 and is perpendicular to the base plate 11. Then the fan is moved onto the rectangular operating platform 1. This can prevent the fan from moving out of its position on the base plate 11, and also protect the fan from falling directly out of the base plate 11 during movement.

[0070] In yet another embodiment, Figure 4 As shown, the rolling shaft 13 includes a fixed member 131 and a rotating member 132;

[0071] The rotating member 132 is sleeved on the fixing member 131 , and the length of the fixing member 131 is greater than that of the rotating member 132 ; the fixing member 131 and the rotating member 132 are connected by a bearing; and both ends of the fixing member 131 are fixedly connected to the mounting frame 12 .

[0072] The rolling shaft 13 includes a fixed member 131 and a rotating member 132, wherein the fixed member 131 is detachably connected to the mounting frame 12, and the rotating member 132 is sleeved on the fixed member 131. The rotating member 132 can rotate freely with the fixed member 131 as an axis. The length of the rotating member 132 is smaller than that of the fixed member 131, so that the fixed member 131 can be connected to the mounting frame 12, and the fixed member 131 is fixedly mounted on the mounting frame 12;

[0073] The fixed member 131 and the rotating member 132 are connected by bearings. The bearings can be arranged at both ends of the rotating member 132. The bearings are fixedly arranged on the fixed member 131, so that the rotating member 131 can rotate around the fixed member 132 as an axis.

[0074] On the basis of the above embodiment, the second support rod 3 and the first support rod 2 are sleeve-connected or spirally connected.

[0075] In one embodiment, the second support rod 3 and the first support rod 2 are sleeve-connected, a plurality of fixing holes 21 are provided on the first support rod 2, and holes corresponding to the fixing holes 21 on the first support rod 2 are provided on the second support rod 3; a positioning piece can be inserted or screwed into the fixing hole 21 to position the height of the rectangular operating platform 1.

[0076] Continue as Figure 1 As shown, the first support rod 2 and the second support rod 3 are connected by sleeve connection, and the second support rod 3 is sleeved into the first support rod 2. After the sleeve connection, the height of the first support rod 2 is adjusted by means of springs, hydraulic pressure, etc.;

[0077] Each first support rod 2 is provided with a plurality of fixing holes 21, and each second support rod 3 is provided with a hole corresponding to the fixing hole 21 on the first support rod 2, and there is a certain distance between the plurality of fixing holes 21; when the second support rod 3 is inserted into the first support rod 2, the fixing holes 21 on the first support rod 2 are aligned with the corresponding holes on the second support rod 3, and the height of the rectangular operating platform 1 can be fixed by connecting positioning pieces such as plugging and screwing.

[0078] In another embodiment, the second support rod 3 is spirally connected to the first support rod 2;

[0079] The first support rod 2 is provided with an internal thread; the second support rod 3 is provided with an external thread, and the second support rod 3 and the first support rod 2 are spirally positioned to determine the height of the rectangular operating platform 1 .

[0080] like Figure 3As shown, the second support rod 3 and the first support rod 2 are spirally connected, each first support rod 2 is provided with an internal thread, and each second support rod 3 is provided with an external thread. The second support rod 3 is used to adjust the height of the first support rod 2 through the spiral; in this embodiment, there is no special limitation on the method for adjusting the height of the first support rod 2 and the second support rod 3.

[0081] On the basis of the above embodiment, the first support rod 2 and the second support rod 3 are tubular structures;

[0082] Elastic components or hydraulic components are arranged in the tubular structures of the first support rod 2 and the second support rod 3 for adjusting the height of the rectangular operating platform 1 .

[0083] The first support rod 2 and the second support rod 3 are tubular structures, wherein the diameters of the first support rod 2 and the second support rod 3 are not equal, the diameter of the first support rod 2 is larger than the diameter of the second support rod 3, or the diameter of the first support rod 2 is smaller than the diameter of the second support rod 3;

[0084] Elastic components, hydraulic components, etc. may be provided in the tubular structures of the first support rod 2 and the second support rod 3 to extend and contract the first support rod 2 and the second support rod 3 , thereby adjusting the height of the rectangular operating platform 1 .

[0085] In another embodiment, a steering component 32 is further provided between the roller 31 and the second support rod 3;

[0086] The steering component 32 is detachably connected to the roller 31 , and the steering component 32 can drive the roller 31 to rotate.

[0087] like Figure 3 As shown, in order to control the moving direction of the device through the pulley 31, a steering component 32 is also provided between the roller 31 and the second support rod 3, wherein the steering component 32 and the pulley 31 can be detachably connected by bolts, locking pins, etc., the steering component 32 can rotate freely around the second support rod 3 as the axis, and the steering component 32 can also drive the pulley 31 to rotate, so as to adjust the moving direction of the entire device through the pulley 31.

[0088] The steering component 32 is fixedly connected to the second support rod 3 .

[0089] The steering component 32 is fixedly connected to the bottom of the second support rod 3, and the steering component 32 is detachably connected to the pulley 31, so that the device is convenient for replacing the pulley.

[0090] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0091] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0092] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0093] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0094] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0095] In addition, spatially relative terms may be used herein for ease of explanation, for example, "below", "below", "below", "above", "above", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figure. Spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein may also be interpreted accordingly. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] Furthermore, in the description of the present invention, it should be noted that the terms "front", "rear", etc. indicate positions or positional relationships based on the positions or positional relationships, or the positions or positional relationships in which the product of the present invention is usually placed when in use, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0097] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0098] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A device for replacing an axial flow fan at the bottom of a tower, characterized in that: The device comprises a rectangular operating platform (1), four first supporting rods (2) and four second supporting rods (3) for supporting the rectangular operating platform; The rectangular operating platform (1) comprises a base plate (11), two mounting frames (12) and a plurality of rolling shafts (13); the two mounting frames (12) are respectively fixedly arranged on both sides of the base plate (11); the plurality of rolling shafts (13) are arranged in parallel on the base plate (11) and are detachably connected to the mounting frames (12); guardrails (14) are respectively fixedly arranged on the two mounting frames (12); the two guardrails (14) are arranged in parallel, and the guardrails (14) are provided with a plurality of through holes; The four first support rods (2) are fixedly arranged on the four feet of the rectangular operating platform (1), and the second support rod (3) and the first support rod (2) are detachably connected; A roller (31) is provided at the bottom of the second support rod (3).

2. The device according to claim 1, characterized in that A fixing portion (15) is provided at one end of the bottom plate (11), and a rotatable locking member (16) is provided on the fixing portion (15). The locking member (16) can be rotated from a position parallel to the bottom plate (11) to a position perpendicular to the bottom plate (11).

3. The device according to claim 1, characterized in that A gap is provided between the rolling shaft (13) and the bottom plate (11); and gaps are provided between a plurality of the rolling shafts (13).

4. The device according to claim 3, characterized in that The rolling shaft (13) comprises a fixed part (131) and a rotating part (132); The rotating member (132) is sleeved on the fixing member (131), and the length of the fixing member (131) is greater than the length of the rotating member (132); The fixed member (131) and the rotating member (132) are connected by a bearing; Both ends of the fixing member (131) are fixedly connected to the mounting frame (12).

5. The device according to claim 1, characterized in that The second support rod (3) and the first support rod (2) are sleeve-connected or spirally connected.

6. The device according to claim 5, characterized in that The second support rod (3) is sleeve-connected with the first support rod (2); a plurality of fixing holes (21) are provided on the first support rod (2); and holes corresponding to the fixing holes (21) on the first support rod (2) are provided on the second support rod (3); A positioning piece can be inserted or screwed into the fixing hole (21) to position the height of the rectangular operating platform (1).

7. The device according to claim 5, characterized in that The second support rod (3) and the first support rod (2) are spirally connected; The first support rod (2) is provided with an internal thread; the second support rod (3) is provided with an external thread, and the second support rod (3) and the first support rod (2) are spirally positioned to determine the height of the rectangular operating platform (1).

8. The device according to claim 6 or 7, characterized in that The first support rod (2) and the second support rod (3) are tubular structures; Elastic components or hydraulic components are arranged in the tubular structures of the first support rod (2) and the second support rod (3) for adjusting the height of the rectangular operating platform (1).

9. The device according to claim 1, characterized in that The roller (31) is arranged at the bottom of the second support rod (3); the roller (31) is fixedly connected to the second support rod (3), and the roller (31) can enable the rectangular operating platform (1) to move.

10. The device according to claim 9, characterized in that A steering component (32) is also provided between the roller (31) and the second support rod (3); The steering component (32) is detachably connected to the roller (31), and the steering component (32) can drive the roller (31) to rotate in a certain direction.

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