Adjustable hole reserved sleeve device

Abstract

The utility model relates to the technical field of building construction, in particular to an adjustable hole reserved sleeve device, which is characterized in that a plurality of symmetrically arranged frame components are arranged, every two adjacent frame components are connected in a sliding manner through a sliding connection component, and a user can adjust the relative position between the adjacent frame components by utilizing the sliding connection components; therefore, the specification of the sleeve device body is changed so as to adapt to the sizes of different holes, and the problems that in an existing reserving mode, aluminum film plates are adopted for construction, due to the diverse sizes of the holes, the aluminum film plates need to be cut into different sizes and numbered according to the sizes of the holes, and in complex and diverse complex projects, due to the diverse holes, the construction cost is low are effectively solved. A large amount of loss is easily caused, and the construction cost is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to an adjustable sleeve device for reserved openings. Background Art

[0002] In building construction, the importance of reserved openings is self-evident. It not only relates to the stability and safety of the building structure, but also is an important measure to improve construction efficiency and reduce later retrofit costs. Through carefully planned and reserved planar openings, the accurate positions of various pipelines, ventilation equipment, fire-fighting facilities and other equipment can be ensured, thereby optimizing the construction process and ensuring the perfection and high efficiency of building functions.

[0003] The traditional reservation method generally uses aluminum formwork construction. However, due to the diverse sizes of the openings, the aluminum formwork needs to be cut into different sizes according to the opening sizes and numbered. This method is only applicable to the construction of standard floors. In complex and diverse complex projects, due to the diverse openings, a large amount of loss is easily caused, increasing the construction cost.

[0004] The present utility model is studied and proposed in view of the deficiencies of the prior art. Content of the Utility Model

[0005] In view of the problem that the existing reservation method mentioned above uses aluminum formwork construction, and due to the diverse sizes of the openings, the aluminum formwork needs to be cut into different sizes according to the opening sizes and numbered. In complex and diverse complex projects, due to the diverse openings, a large amount of loss is easily caused, increasing the construction cost, the technical solution adopted by the present utility model to solve its technical problems is:

[0006] An adjustable sleeve device for reserved openings, comprising a sleeve device body. The sleeve device body includes a plurality of symmetrically arranged frame components. A sliding connection component is provided between each adjacent frame component, and each frame component is slidably connected through the sliding connection component so that the size of the sleeve device body can be adjusted to adapt to the opening size.

[0007] Further, the frame component includes a first frame component, a fourth frame component oppositely arranged to the first frame component, a second frame component and a third frame component respectively connected between the first frame component and the fourth frame component. The adjacent frame components can slide relative to each other, and the frame components enclose to form a quadrilateral.

[0008] Further, the sliding connection component includes a sliding notch located on one side of the first frame component close to the fourth frame component and penetrating through the first frame component. The fourth frame component moves relative to the first frame component through the sliding notch.

[0009] Further, the sliding connection assembly further includes a connecting bolt, a connecting plate located on the inner side wall of the fourth frame assembly, and a nut. The connecting bolt passes through the first frame assembly, the fourth frame assembly, and the connecting plate through the sliding notch and is threadedly connected to the nut, so that the first frame assembly is slidably connected to the fourth frame assembly.

[0010] Further, a sealing assembly is provided between the first frame assembly and the fourth frame assembly to prevent mud from entering the interior of the casing device body through the sliding notch. The sealing assembly includes an adjusting assembly rotatably connected to the inner side wall of the first frame assembly on the side of the sliding notch away from the fourth frame assembly, and a rubber sealing strip covering the sliding notch and having an adjustable relative length.

[0011] Further, the adjusting assembly includes an adjusting screw rod connected to the inner side wall of the first frame assembly, a winding drum sleeved on the outer side wall of the adjusting screw rod and capable of rotating relative to the adjusting screw rod, and an adjusting nut threadedly connected to the adjusting screw rod so that the winding drum can rotate relatively.

[0012] Further, one end of the rubber sealing strip is located between the first frame assembly and the fourth frame assembly and is penetrated by the connecting bolt, and the other end of the rubber sealing strip is connected to the outer side wall of the adjusting assembly.

[0013] Further, a limit block is provided on the side of the sliding notch close to the adjusting assembly, and a gap for the rubber sealing strip to pass through is provided between the limit block and the sliding notch. The rubber sealing strip passes through the gap and is connected to the outer side wall of the adjusting assembly.

[0014] Further, the first frame assembly, the second frame assembly, the third frame assembly, and the fourth frame assembly are all in an "L" shape and enclose to form a rectangle.

[0015] Further, the adjusting screw rod is welded to the inner side wall of the first frame assembly.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. For an adjustable hole-retaining casing device of the present utility model, by providing a plurality of symmetrically arranged frame assemblies, each adjacent frame assembly is slidably connected by a sliding connection assembly. The user can use the sliding connection assembly to adjust the relative position between adjacent frame assemblies, so as to change the specification of the casing device body, thereby adapting to the sizes of different holes, effectively solving the problem that in the existing hole-retaining method using aluminum formwork construction, due to the diverse sizes of holes, it is necessary to cut the aluminum formwork into different sizes according to the hole sizes and number them. In complex and diverse comprehensive projects, due to the diverse holes, it is easy to cause a large amount of loss and increase the construction cost.

[0018] 2. The casing device body can be reused according to the requirements of different projects, reducing the investment cost and the impact on the environment, meeting the requirements of sustainable development;

[0019] 3. Traditional methods require cutting and numbering aluminum formwork according to different hole sizes, increasing the complexity and cost of construction. However, with the casing device body, there is no need to frequently cut and replace materials, simplifying the construction process and facilitating the improvement of construction efficiency.

[0020] The present invention will be further described below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0021] Figure 1 is a schematic structural view of an adjustable hole-retaining casing device of the present invention;

[0022] Figure 2 is an exploded view of an adjustable hole-retaining casing device of the present invention. Specific Embodiments

[0023] The embodiments of the present invention will be described in detail below in conjunction with the drawings.

[0024] As Figures 1 to 2 shown, an adjustable hole-retaining casing device includes a casing device body 1. The casing device body 1 includes a plurality of symmetrically arranged frame components 2. A sliding connection component 3 is provided between each adjacent frame component 2. Each frame component 2 is slidably connected through the sliding connection component 3 so that the size of the casing device body 1 can be adjusted to adapt to the hole size;

[0025] In an adjustable hole-retaining casing device of the present invention, by providing a plurality of symmetrically arranged frame components and slidably connecting each adjacent frame component through a sliding connection component, a user can adjust the relative position between adjacent frame components by using the sliding connection component, so as to change the specification of the casing device body and thus adapt to the sizes of different holes, effectively solving the problem that in the existing hole-retaining method using aluminum formwork construction, due to the diverse hole sizes, the aluminum formwork needs to be cut into different sizes and numbered according to the hole sizes, and in complex and diverse comprehensive projects, due to the diverse holes, it is easy to cause a large amount of loss and increase the construction cost.

[0026] The casing device body 1 can be reused according to the requirements of different projects, reducing the investment cost and the impact on the environment, meeting the requirements of sustainable development.

[0027] Traditional methods require cutting and numbering aluminum formwork according to different hole sizes, increasing the complexity and cost of construction. By using the casing device body 1, frequent cutting and material replacement are not required, simplifying the construction process and facilitating the improvement of construction efficiency.

[0028] Optionally, in some embodiments, the frame assembly 2 can be made of wood, high-hardness plastic or metal.

[0029] Preferably, as a preferred embodiment of the present invention rather than a limitation, the frame assembly 2 is made of steel. As a high-strength material, steel has good load-bearing capacity and anti-deformation ability. Using a steel frame assembly 2 can ensure the stability and reliability of the device, and it can withstand large pressures and loads. Secondly, steel has good corrosion resistance and can resist the erosion of the atmosphere, water and chemical media. Therefore, when used outdoors or in humid environments, it can maintain long-term stability and durability, effectively extending the service life of the device. Then, steel is easy to process and form, and can be processed by cutting, welding and bending according to design requirements to manufacture a frame assembly 2 that meets specific size and shape requirements, improving the applicability and flexibility of the device. Finally, steel can be recycled and reused, meeting the concepts of environmental protection and sustainable development. Using steel to manufacture the frame assembly 2 can not only reduce the consumption of natural resources, but also reduce energy consumption and environmental pollution during construction, meeting the requirements of modern society for green construction.

[0030] As Figures 1 to 2 The frame assembly 2 shown in the figure includes a first frame assembly 21, a fourth frame assembly 24 disposed opposite to the first frame assembly 21, a second frame assembly 22 and a third frame assembly 23 respectively connected between the first frame assembly 21 and the fourth frame assembly 24. Adjacent frame assemblies 2 can slide relative to each other, and the frame assemblies 2 enclose a quadrilateral.

[0031] Optionally, the number of frame assemblies 2 is at least two.

[0032] Further, as a preferred embodiment of the present invention rather than a limitation, the number of frame assemblies 2 is four, and the frame assembly 2 includes a first frame assembly 21, a second frame assembly 22, a third frame assembly 23 and a fourth frame assembly 24.

[0033] Furthermore, through the connection of multiple frame assemblies 2, a stable overall structure is formed. The first frame assembly 21, the second frame assembly 22, the third frame assembly 23 and the fourth frame assembly 24 are slidably connected to each other, which can effectively share the external forces applied to the casing device body 1 and enhance the overall stability and load-bearing capacity of the device.

[0034] Furthermore, the adoption of multiple frame components 2 can broaden the adjustment range of the casing device body 1, enabling it to adapt to openings of more sizes and shapes. The sliding connection between each frame component 2 allows the length of the casing device body 1 to be flexibly adjusted as needed, enhancing the applicability and flexibility of the device.

[0035] As Figures 1 to 2 shown, the sliding connection component 3 includes a sliding notch 31 located on the side of the first frame component 21 close to the fourth frame component 24 and penetrating through the first frame component 21. The fourth frame component 24 moves relative to the first frame component 21 through the sliding notch 31.

[0036] Furthermore, as part of the sliding connection component 3, the sliding notch 31 provides a stable connection method. The fourth frame component 24 moves relative to the first frame component 21 through the sliding notch 31, which can ensure the firmness and stability of the connection, prevent loosening or detachment, and enhance the reliability and safety of the device.

[0037] Furthermore, the setting of the sliding notch 31 makes the movement between the frame components 2 more convenient. By adjusting the position of the fourth frame component 24 within the sliding notch 31, the size adjustment of the casing device body 1 can be easily achieved, improving the convenience and flexibility of adjustment and reducing the trouble and complexity during the adjustment process.

[0038] Similarly, there is a sliding notch 31 between the first frame component 21 and the second frame component 22. The sliding notch can be located on the side of the first frame component 21 close to the second frame component 22 or on the side of the second frame component 22 close to the first frame component 21; there is a sliding notch 31 between the second frame component 22 and the third frame component 23. The sliding notch 31 can be located on the side of the second frame component 22 close to the third frame component 23 or on the side of the third frame component 23 close to the second frame component 22; there is a sliding notch 31 between the third frame component 23 and the fourth frame component 24. The sliding notch 31 can be located on the side of the third frame component 23 close to the fourth frame component 24 or on the side of the fourth frame component 24 close to the third frame component 23.

[0039] As Figures 1 to 2 shown, the sliding connection component 3 further includes a connecting bolt 32, a connecting plate 34 located on the inner side wall of the fourth frame component 24, and a nut 33. The connecting bolt 32 passes through the first frame component 21, the fourth frame component 24, and the connecting plate 34 through the sliding notch 31 and is threadedly connected to the nut 33, so that the first frame component 21 and the fourth frame component 24 are slidably connected.

[0040] Specifically, when the user needs to adjust the relative positions of the first frame component 21 and the fourth frame component 24, turn the nut 33 to make the acting force of the nut 33 pressing the first frame component 21 and the fourth frame component 24 through the connecting plate 34 disappear. The fourth frame component 24 can move relatively through the sliding notch 31. When the fourth frame component 24 is adjusted to the appropriate position, screw on the nut 33 again. The nut 33 can apply pressure to the connecting plate 34, the first frame component 21 and the fourth frame component 24 through threaded cooperation with the connecting bolt 32, thereby fastening the device.

[0041] Similarly, connecting bolts 32, connecting plates 34 and nuts 33 are provided and matched between the first frame component 21 and the second frame component 22, between the second frame component 22 and the third frame component 23, and between the third frame component 23 and the fourth frame component 24.

[0042] Furthermore, the connection method using the connecting bolt 32 and the nut 33 enables the connection between the frame components 2 to have a certain degree of disassembly, which is beneficial to the disassembly and maintenance of the device. When it is necessary to repair or replace components of the casing device body 1, only the connecting bolt 32 and the nut 33 need to be removed, reducing the complexity and time cost of the maintenance process.

[0043] Furthermore, by setting the connecting plate 34, the contact area between the nut 33 and the fourth frame component 24 can be increased, thereby increasing the friction force between them, which is beneficial to ensuring a more secure connection and preventing loosening or falling off during use. The increase in the friction force also helps to prevent the connection from moving when subjected to external vibration or impact, thereby improving the stability and safety of the entire device.

[0044] As Figures 1 to 2 shown, a sealing component 5 for preventing mud from entering the inside of the casing device body 1 through the sliding notch 31 is provided between the first frame component 21 and the fourth frame component 24. The sealing component 5 includes an adjusting component 51 located on the side of the sliding notch 31 away from the fourth frame component 24 and rotatably connected to the inner side wall of the first frame component 21, and a rubber sealing strip 52 covering the sliding notch 31 and having an adjustable relative length;

[0045] Specifically, the length of the rubber sealing strip 52 corresponds to the exposed opening length of the sliding slot 31. When the fourth frame assembly 24 moves closer to the first frame assembly 21, the exposed opening length of the sliding slot 31 decreases. The rubber sealing strip 52 is connected to the outer sidewall of the adjusting assembly 51. By rotating the adjusting assembly 51, the length of the rubber sealing strip 52 is shortened following the decrease in the exposed opening length of the sliding slot 31. When the fourth frame assembly 24 moves away from the first frame assembly 21, the exposed opening length of the sliding slot 31 increases. By rotating the adjusting assembly 51, the length of the rubber sealing strip 52 is elongated following the increase in the exposed opening length of the sliding slot 31. The length of the rubber sealing strip 52 always remains consistent with the exposed opening length of the sliding slot 31.

[0046] Furthermore, by providing the rubber sealing strip 52, it effectively prevents the situation where mud enters the inside of the casing device body 1 through the sliding slot 31. The rubber sealing strip 52 covers the sliding slot 31 and its relative length can be adjusted, thereby ensuring good sealing performance and effectively preventing external substances such as mud from entering the inside of the casing device, protecting the internal structure from contamination and corrosion, and extending the service life of the device.

[0047] Furthermore, the setting of the adjusting assembly 51 makes the adjustment of the rubber sealing strip 52 more flexible and convenient. By the rotational connection between the adjusting assembly 51 and the inner sidewall of the first frame assembly 21, the position and length of the rubber sealing strip 52 can be conveniently adjusted, which is beneficial to improving the adjustability and applicability of the sealing effect.

[0048] As Figures 1 to 2 shown, the adjusting assembly 51 includes an adjusting screw 511 connected to the inner sidewall of the first frame assembly 21, a winding drum 512 sleeved on the outer sidewall of the adjusting screw 511 and capable of rotating relative to the adjusting screw 511, and an adjusting nut 513 threadedly connected to the adjusting screw 511 to enable the winding drum 512 to rotate relatively;

[0049] Specifically, the adjusting screw rod 511 is fixedly connected to the inner side wall of the first frame assembly 21. A winding and unwinding drum 512 is sleeved on the outer side wall of the adjusting screw rod 511. The rubber sealing strip 52 is connected to the outer side wall of the winding and unwinding drum 512 and is wound and unwound along the outer side wall of the winding and unwinding drum 512. When the length of the rubber sealing strip 52 needs to be adjusted, the user only needs to loosen the adjusting nut 513 and the adjusting screw rod 511 so that the winding and unwinding drum 512 can rotate. One end of the rubber sealing strip 52 is located at the connection between the first frame assembly 21 and the fourth frame assembly 24 and is penetrated by the connecting bolt 32. When the fourth frame assembly 24 approaches the first frame assembly 21, the rubber sealing strip 52 gradually rotates from the vertical direction to the horizontal direction along with the rotation of the winding and unwinding drum 512 and fits against the outer side wall of the winding and unwinding drum 512. The rubber sealing strip 52 is curled and contracted along with the rotation of the winding and unwinding drum 512, thereby reducing the length. When the fourth frame assembly 24 moves away from the first frame assembly 21, the rubber sealing strip 52 gradually rotates from the horizontal direction to the vertical direction along with the reverse rotation of the winding and unwinding drum 512 and covers the exposed opening length of the sliding slot 31, achieving the effect of extending the length.

[0050] As Figures 1 to 2 shown, one end of the rubber sealing strip 52 is located between the first frame assembly 21 and the fourth frame assembly 24 and is penetrated by the connecting bolt 32, and the other end of the rubber sealing strip 52 is connected to the outer side wall of the adjusting assembly 51;

[0051] Furthermore, one end of the rubber sealing strip 52 is located between the first frame assembly 21 and the fourth frame assembly 24 and is penetrated by the connecting bolt 32, and the other end of the rubber sealing strip 52 is adhesively connected to the outer side wall of the adjusting assembly 51, so that the fourth frame assembly 24, the rubber sealing strip 52 and the adjusting assembly 51 can move synchronously, maintaining the tight combination of the fourth frame assembly 24, the rubber sealing strip 52 and the adjusting assembly 51, which is beneficial to improving the reliability and stability of the sealing effect.

[0052] As Figures 1 to 2 shown, a limit clamping block 6 is provided on one side of the sliding slot 31 close to the adjusting assembly 51. A gap for the rubber sealing strip 52 to pass through is provided between the limit clamping block 6 and the sliding slot 31, and the rubber sealing strip 52 passes through the gap and is connected to the outer side wall of the adjusting assembly 51;

[0053] Furthermore, by providing the limit clamping block 6, when the rubber sealing strip 52 is curled in cooperation with the winding and unwinding drum 512, the rubber sealing strip 52 gradually rotates from the vertical direction to the horizontal direction and is curled and unwound against the outer side wall of the winding and unwinding drum 512. The limit clamping block 6 can better maintain the shape of the rubber sealing strip 52 in the vertical direction, so that it is easier to rotate from the vertical direction to the horizontal direction. At the same time, the setting of the limit clamping block 6 effectively prevents the rubber sealing strip 52 from becoming loose.

[0054] Specifically, the rubber sealing strip 52 is connected to the outer wall of the winding and unwinding drum 512 through the gap between the limiting block 6 and the sliding notch 31. When the rubber sealing strip 52 passes through the gap, it remains vertical with the limiting block 6. As the rubber sealing strip 52 gradually approaches the winding and unwinding drum 512, the rubber sealing strip 52 gradually rotates in the horizontal direction. Finally, the rubber sealing strip 52 is folded by 90°. The rubber sealing strip 52 is folded by 90° from the vertical direction to the horizontal direction and fits against the outer wall of the winding and unwinding drum 512.

[0055] As Figures 1 to 2 shown, the first frame component 21, the second frame component 22, the third frame component 23, and the fourth frame component 24 are all in an "L" shape and enclose to form a rectangle.

[0056] Optionally, in some embodiments, the frame component 2 is in a "one" shape.

[0057] Preferably, as a preferred embodiment of the present invention rather than a limitation, the first frame component 21, the second frame component 22, the third frame component 23, and the fourth frame component 24 are all in an "L" shape. The "L" shape setting can increase the stability and structural strength of the frame component. The first frame component 21, the second frame component 22, the third frame component 23, and the fourth frame component 24 enclose each other to form a rectangle, making the entire frame structure more firm, capable of better withstanding external pressure and force, and improving the overall stability and durability of the device.

[0058] Furthermore, the "L" - shaped frame component 2 simplifies the assembly process. Since the shapes and angles of the respective frame components 2 are relatively fixed, assemblers can more conveniently combine them together, reducing possible errors or unnecessary adjustments during the assembly process, and effectively improving the assembly efficiency and accuracy.

[0059] As Figures 1 to 2 shown, the adjusting screw 511 is welded to the inner side wall of the first frame component 21.

[0060] Optionally, welding the adjusting screw 511 to the inner side wall of the first frame component 21 can enhance the stability and firmness of the entire structure. The welding connection method can ensure a firm and reliable connection between the adjusting screw 511 and the frame component 2, reducing the possibility of loosening or falling off, which is beneficial to improving the service life of the device.

[0061] Furthermore, the welding connection can effectively reduce the loosening between the adjusting screw 511 and the frame component 2. Compared with traditional connection methods such as bolt connection, the welding connection is more tightly fastened and less likely to loosen, ensuring the stability and accuracy of the adjusting screw 511 during use.

[0062] The implementation method of this embodiment is as follows:

[0063] An adjustable sleeve device for reserved openings, comprising a sleeve device body 1. The sleeve device body 1 includes a number of symmetrically arranged frame components 2. The frame components 2 include a first frame component 21, a second frame component 22, a third frame component 23 and a fourth frame component 24. The first frame component 21, the second frame component 22, the third frame component 23 and the fourth frame component 24 are slidably connected to each other and enclose to form a rectangular sleeve device body 1. A sliding connection component 3 is provided between each adjacent frame component 2. The user can use the sliding connection component 3 to adjust the relative position between adjacent frame components 2, so as to change the specification of the sleeve device body 1, thereby adapting to the sizes of different openings, effectively solving the problem that in the existing reserved method using aluminum formwork construction, due to the diverse sizes of openings, the aluminum formwork needs to be cut into different sizes and numbered according to the opening sizes. In complex and diverse comprehensive projects, due to the diverse openings, it is easy to cause a large amount of loss and increase the construction cost. The sliding connection component 3 includes a sliding notch 31 located on the first frame component 21 close to the fourth frame component 24 and penetrating the first frame component 21. The sliding connection component 3 further includes a connecting bolt 32, a nut 33 and a connecting plate 34 located on the inner side wall close to the fourth frame component 24. The connecting bolt 32 sequentially penetrates the first frame component 21, the fourth frame component 24 and the connecting plate 34 through the sliding notch 31 and is threadedly connected to the nut 33, so that the fourth frame component 24 can move relative to the first frame component 21 through the sliding notch 31. A sealing component 5 is further provided between the first frame component 21 and the fourth frame component 24. The sealing component 5 includes an adjusting component 51 located on the side of the sliding notch 31 away from the fourth frame component 24 and rotatably connected to the inner side wall of the first frame component 21, and a rubber sealing strip 52 covering the sliding notch 31 to prevent mud from entering the interior of the sleeve device body 1 through the sliding notch 31. One end of the rubber sealing strip 52 is connected to the outer side wall of the adjusting component 51, and the other end of the rubber sealing strip 52 is located between the first frame component 21 and the fourth frame component 24 and is penetrated by the connecting bolt 32. When the fourth frame component 24 moves relative to the first frame component 21, the exposed length of the sliding notch 31 changes accordingly. The user can change the length of the rubber sealing strip 52 by rotating the adjusting component 51, and the length of the rubber sealing strip 52 is always consistent with the exposed length of the sliding notch 31. Similarly, the sliding connection settings between the first frame component 21 and the second frame component 22, between the second frame component 22 and the third frame component 23, and between the third frame component 23 and the fourth frame component 24 are the same as the connection settings between the first frame component 21 and the fourth frame component 24.

[0064] The above only further illustrates the technical content of the present utility model by way of examples for the convenience of readers to understand more easily, but it does not mean that the implementation modes of the present utility model are limited thereto. Any technical extension or re-creation made according to the present utility model is protected by the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. An adjustable hole-preserving sleeve device, comprising a sleeve device body (1), characterized in that: The sleeve device body (1) comprises a plurality of symmetrically arranged frame assemblies (2), a sliding connection assembly (3) being provided between each adjacent frame assembly (2), and each frame assembly (2) being slidably connected via the sliding connection assembly (3), so that the sleeve device body (1) can be adjusted in size to adapt to the size of the hole.

2. The adjustable hole-preserving sleeve device according to claim 1, characterized in that: The frame assembly (2) comprises a first frame assembly (21), a fourth frame assembly (24) arranged opposite to the first frame assembly (21), and a second frame assembly (22) and a third frame assembly (23) respectively connected between the first frame assembly (21) and the fourth frame assembly (24); adjacent frame assemblies (2) are relatively slidable, and the frame assemblies (2) are enclosed to form a quadrilateral.

3. The adjustable hole-preserving sleeve device according to claim 2, characterized in that: The sliding connection assembly (3) comprises a sliding notch (31) located on a side of the first frame assembly (21) close to the fourth frame assembly (24) and penetrating the first frame assembly (21); the fourth frame assembly (24) moves relative to the first frame assembly (21) via the sliding notch (31).

4. The adjustable hole pre-reserved sleeve device according to claim 3, characterized in that: The sliding connection assembly (3) further comprises a connecting bolt (32), a connecting plate (34) located on the inner side wall of the fourth frame assembly (24), and a nut (33); the connecting bolt (32) passes through the first frame assembly (21), the fourth frame assembly (24), and the connecting plate (34) through the sliding slot (31) and is threadedly connected to the nut (33), so that the first frame assembly (21) and the fourth frame assembly (24) are slidably connected.

5. The adjustable hole-preserving sleeve device according to claim 4, characterized in that: A sealing assembly (5) is provided between the first frame assembly (21) and the fourth frame assembly (24) for preventing mud from entering the interior of the casing device body (1) through the sliding slot (31), the sealing assembly (5) comprising an adjusting assembly (51) located on a side of the sliding slot (31) away from the fourth frame assembly (24) and rotatably connected to the inner side wall of the first frame assembly (21), and a rubber sealing strip (52) covering the sliding slot (31) and having an adjustable relative length.

6. The adjustable hole-preserving sleeve device according to claim 5, characterized in that: The adjustment assembly (51) comprises an adjustment screw (511) connected to the inner side wall of the first frame assembly (21), a retractable roller (512) sleeved on the outer side wall of the adjustment screw (511) and rotatable relative to the adjustment screw (511), and an adjustment nut (513) threadedly connected to the adjustment screw (511) so as to enable the retractable roller (512) to rotate relatively.

7. The adjustable hole-preserving sleeve device according to claim 5, characterized in that: One end of the rubber sealing strip (52) is located between the first frame assembly (21) and the fourth frame assembly (24) and is penetrated by the connecting bolt (32), and the other end of the rubber sealing strip (52) is connected to the outer side wall of the adjustment assembly (51).

8. The adjustable hole-preserving sleeve device according to claim 5, characterized in that: A limiting block (6) is provided on one side of the sliding slot (31) close to the adjusting component (51), a gap is provided between the limiting block (6) and the sliding slot (31) for the rubber sealing strip (52) to pass through, and the rubber sealing strip (52) passes through the gap and is connected to the outer side wall of the adjusting component (51).

9. The adjustable hole-preserving sleeve device according to claim 2, characterized in that: The first frame assembly (21), the second frame assembly (22), the third frame assembly (23) and the fourth frame assembly (24) are all L-shaped and enclosed to form a rectangle.

10. The adjustable hole-preserving sleeve device according to claim 6, characterized in that: The adjusting screw (511) is welded to the inner wall of the first frame assembly (21).

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