Lifting device capable of adjusting height of bucket screen

By designing an adjustable bucket screen height lifting device, and using an electric hoist and a wire rope to adjust the bucket screen keel height, the viewing effect and maintenance difficulty caused by the fixed height of the traditional bucket screen is solved, and flexible viewing and maintenance configuration is achieved.

CN222142665UActive Publication Date: 2024-12-10NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD
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Patent Information

Application Number
CN202420812500.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-18
Publication Date
2024-12-10
Estimated Expiration
2034-04-18

AI Technical Summary

Technical Problem

The traditional bucket screen is fixed in height, which makes it difficult to conduct post-inspection and maintenance work and cannot guarantee the best viewing effect.

Method used

Design a lifting device that can adjust the height of the bucket screen, including the main steel structure truss, lifting platform, lifting equipment and bucket screen steel structure keel. The height adjustment of the bucket screen keel is achieved through electric hoist and wire rope, and the lifting is synchronized with the coordinated control device. Component action.

Benefits of technology

The height adjustment of the main and secondary screens of the bucket screen is achieved, ensuring that the viewer gets the best viewing effect, and convenient maintenance work, reducing the difficulty of maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a lifting device capable of adjusting the height of a bucket screen. The lifting device comprises a main body steel structure truss; the lifting platform is fixed on the main body steel structure truss; the lifting equipment is fixed on the lifting platform; the bucket screen steel structure keel is connected with lifting equipment, a bucket screen main screen is fixed to the periphery of the bucket screen steel structure keel, and a bucket screen secondary screen is fixed to the bottom of the bucket screen steel structure keel; wherein the lifting equipment is used for adjusting the height of the bucket screen steel structure keel. The height of the bucket screen steel structure keel is adjusted through the lifting equipment. In this way, the bucket screen main screen and the bucket screen secondary screen can be adjusted to the proper watching height, and therefore it is ensured that a viewer can obtain the best watching effect. Similarly, the height of the bucket screen steel structure keel is adjusted through lifting equipment. In this way, the bucket screen main screen and the bucket screen secondary screen can be adjusted to the proper maintenance height, so that maintenance of a maintenance station is facilitated.
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Description

Technical Field

[0001] The utility model relates to the technical field of bucket screen lifting equipment, in particular to a lifting device capable of adjusting the height of a bucket screen. Background Art

[0002] The square LED display in the center of the venue is called the "bucket screen" because of its funnel-like shape. It can play graphic information in different directions, allowing the audience to watch clearly from any angle. Traditional bucket screens cannot be moved after installation. First, the subsequent inspection and maintenance work is difficult, and second, the height of the bucket screen is relatively fixed, which cannot guarantee the best viewing effect.

[0003] That is to say, the existing technology of the bucket screen has the problem that the later inspection and maintenance work is difficult and the best viewing effect cannot be guaranteed. Utility Model Content

[0004] The utility model provides a lifting device capable of adjusting the height of a bucket screen to solve the above technical problems, thereby solving the problems that the later inspection and maintenance of the bucket screen is difficult and the best viewing effect cannot be guaranteed.

[0005] The utility model provides a lifting device capable of adjusting the height of a bucket screen, comprising: a main steel structure truss; and

[0006] A lifting platform fixed to the main steel structure truss; and

[0007] lifting equipment, which is fixed to the lifting platform; and

[0008] The bucket screen steel structure keel is connected to the lifting equipment. The bucket screen main screen is fixed on the outer periphery of the bucket screen steel structure keel, and the bucket screen secondary screen is fixed at the bottom;

[0009] Among them, the lifting equipment is used to adjust the height of the bucket screen steel structure keel.

[0010] In one embodiment, the main steel structure truss comprises:

[0011] Frame; and

[0012] One end of a plurality of suspension fixing components arranged at intervals is fixed on the frame, and the other ends of the plurality of suspension fixing components are connected to the lifting platform.

[0013] In one embodiment, the suspension fixing assembly comprises:

[0014] Transverse angles; and

[0015] Clamps, which fix the transverse angle steel to the frame; and

[0016] One end of the vertical hanger is connected to the horizontal angle steel, and the other end of the vertical hanger is connected to the lifting platform.

[0017] In one embodiment, the lifting device includes a plurality of lifting assemblies spaced apart on a lifting platform, including:

[0018] An electric winch base, which is arranged on the lifting platform; and

[0019] A motor, which is arranged on a base of the electric winch; and

[0020] a rotating shaft connected to the rotating shaft of the motor; and

[0021] A reel is sleeved on the rotating shaft, and the reel can rotate synchronously with the rotating shaft; and

[0022] a steel wire rope, one end of which is fixed to the outer circumference of the drum; and

[0023] A connection point, one end of which is connected to the other end of the steel wire rope, and the other end of the connection point is connected to the keel of the bucket screen steel structure;

[0024] The motor can drive the rotating shaft to drive the reel to rotate so as to reel in the wire rope.

[0025] In one embodiment, a cooperative control device is also included, which is electrically connected to multiple lifting components at the same time and is used to control the synchronous movement of the multiple lifting components.

[0026] In one embodiment, the lifting platform comprises:

[0027] Steel grating; and

[0028] A plurality of lifting platform I-beams, which are arranged at the bottom of the steel grating plate; and

[0029] A guardrail, which is arranged on the outer periphery of the steel grating;

[0030] Among them, the collaborative control device is arranged on a steel grating plate, a plurality of lifting equipment openings are arranged on the steel grating plate, a plurality of lifting components are arranged one by one at the plurality of lifting equipment openings, and the steel wire ropes of the lifting components are located in the corresponding lifting equipment openings.

[0031] In one embodiment, the connection points include:

[0032] Steel structure keel hanging points, which are arranged on the bucket screen steel structure keel; and

[0033] Two slots are arranged at intervals on the steel structure keel hanging points; and

[0034] a pulley, one end of which is rotatably connected to one of the two slots, and the other end of the pulley is rotatably connected to the other slot; and

[0035] Bolts, which are used to fix the two slots on the steel structure keel hanging points;

[0036] The other end of the steel wire rope is fixed on the outer circumference of the pulley.

[0037] In one embodiment, a connection assembly is also included, comprising:

[0038] A connecting piece, on which an opening limit groove is arranged, one end of the connecting piece is connected to the main screen of the bucket screen, and the keel part of the bucket screen steel structure is located in the opening limit groove; and

[0039] The screw is passed through the opening of the opening limit groove, the screw is threadedly connected to the connecting piece, and the screw is used to fix the bucket screen steel structure keel in the opening limit groove.

[0040] In one embodiment, the steel structure keel of the bucket screen includes:

[0041] The inner frame has a top end connected to the lifting device, and a bucket screen and a secondary screen are fixed to the bottom end of the inner frame; and

[0042] The outer frame is arranged on the outer periphery of the inner frame, and the main screen of the bucket screen is fixed on the outer frame.

[0043] In one embodiment, the outer frame is constructed as a polygonal pyramid, and the small end of the outer frame is closer to the bottom end of the inner frame than the large end of the polygonal pyramid.

[0044] Compared with the prior art, the utility model has the following beneficial effects: the height of the steel structure keel of the bucket screen is adjusted by using the lifting equipment. In this way, the main bucket screen and the secondary bucket screen can be adjusted to a suitable viewing height, thereby ensuring that the spectators can obtain the best viewing effect. Similarly, the height of the steel structure keel of the bucket screen is adjusted by using the lifting equipment. In this way, the main bucket screen and the secondary bucket screen can be adjusted to a suitable maintenance height, so as to facilitate maintenance at the maintenance station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structural composition of the lifting device capable of adjusting the height of the bucket screen in the embodiment of the utility model;

[0046] Figure 2 for Figure 1 Schematic diagram of the main steel structure truss;

[0047] Figure 3 for Figure 1 Schematic diagram of the structural composition of the middle lifting platform;

[0048] Figure 4 for Figure 3 Section view at AA;

[0049] Figure 5for Figure 1 Schematic diagram of the connection relationship between the motor, drum, base and wire rope of the lifting equipment;

[0050] Figure 6 for Figure 1 Schematic diagram of the connection relationship between the slot of the middle lifting equipment, the keel suspension point of the bucket screen steel structure, the pulley and the wire rope;

[0051] Figure 7 for Figure 1 Schematic diagram of the connection relationship between the steel structure keel of the middle bucket screen, the main bucket screen and the secondary bucket screen;

[0052] Figure 8 for Figure 1 Schematic diagram of the structural composition of the connected components.

[0053] In the figure: 1. main steel structure truss; 2. lifting platform; 3. lifting equipment; 4. connection point; 5. steel wire rope; 6. bucket screen steel structure keel; 110. frame; 120. clamp; 130. nut; 140. horizontal angle steel; 150. vertical suspension rod; 201. lifting platform I-beam; 202. steel grating; 203. guardrail; 204. lifting equipment opening; 205. cooperative control device; 310. motor; 320. drum; 330. electric winch base; 420. bolt; 430. pulley; 440. bucket screen steel structure keel hanging point; 450. slot; 601. vertical hanging point; 602. angle steel; 603. inclined angle steel; 604. bucket screen main screen; 605. bucket screen secondary screen; 610. screw; 620. connecting piece. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] like Figures 1 to 8 As shown, the utility model provides a lifting device capable of adjusting the height of a bucket screen, and the lifting device capable of adjusting the height of a bucket screen comprises a main steel structure truss 1, a lifting platform 2, a lifting device 3 and a bucket screen steel structure keel 6. Among them, the lifting platform 2 is fixed on the main steel structure truss 1; the lifting device 3 is fixed on the lifting platform 2; the bucket screen steel structure keel 6 is connected to the lifting device 3, and a bucket screen main screen 604 is fixed on the outer periphery of the bucket screen steel structure keel 6, and a bucket screen secondary screen 605 is fixed at the bottom; the lifting device 3 is used to adjust the height of the bucket screen steel structure keel 6.

[0056] In the above arrangement, the height of the bucket screen steel structure keel 6 is adjusted by using the lifting device 3. In this way, the bucket screen main screen 604 and the bucket screen secondary screen 605 can be adjusted to a suitable viewing height, thereby ensuring that the spectators can obtain the best viewing effect. Similarly, the height of the bucket screen steel structure keel 6 is adjusted by using the lifting device 3. In this way, the bucket screen main screen 604 and the bucket screen secondary screen 605 can be adjusted to a suitable maintenance height to facilitate maintenance at the maintenance station.

[0057] Specifically, in one embodiment, the main steel structure truss 1 includes a frame 110 and a plurality of suspension fixing components arranged at intervals, wherein one end of the plurality of suspension fixing components arranged at intervals is fixed on the frame 110, and the other end of the plurality of suspension fixing components is connected to the lifting platform 2.

[0058] It should be noted that the frame 110 is a fixed foundation, and the suspension fixing assembly is used to suspend the lifting platform 2.

[0059] Specifically, in one embodiment, the suspension fixing assembly includes a transverse angle steel 140, a clamp 120, and a vertical suspension rod 150. The clamp 120 fixes the transverse angle steel 140 to the frame 110; and the vertical suspension rod 150 has one end connected to the transverse angle steel 140, and the other end of the vertical suspension rod 150 is connected to the lifting platform 2.

[0060] Specifically, in one embodiment, the lifting device 3 includes a plurality of lifting components arranged at intervals on the lifting platform 2, which include an electric winch base 330, a motor 310, a rotating shaft, a drum 320, a steel wire rope 5 and a connection point 4. Among them, the electric winch base 330 is arranged on the lifting platform 2; the motor 310 is arranged on the electric winch base 330; the rotating shaft is connected to the rotating shaft of the motor 310; the drum 320 is sleeved on the rotating shaft, and the drum 320 can rotate synchronously with the rotating shaft; the steel wire rope 5, one end of which is fixed on the outer periphery of the drum 320; the connection point 4, one end of which is connected to the other end of the steel wire rope 5, and the other end of the connection point 4 is connected to the bucket screen steel structure keel 6; the motor 310 can drive the rotating shaft to drive the drum 320 to rotate to reel in the steel wire rope 5.

[0061] Specifically, in one embodiment, a collaborative control device 205 is also included. The collaborative control device 205 is electrically connected to multiple lifting components at the same time to control the synchronous movement of the multiple lifting components.

[0062] Specifically, in one embodiment, the lifting platform 2 includes a steel grating plate 202, a plurality of lifting platform I-beams 201, and a guardrail 203. The plurality of lifting platform I-beams 201 are arranged at the bottom of the steel grating plate 202; the guardrail 203 is arranged on the outer periphery of the steel grating plate 202; the coordinated control device 205 is arranged on the steel grating plate 202, and a plurality of lifting equipment openings 204 are arranged on the steel grating plate 202, and a plurality of lifting components are arranged at the plurality of lifting equipment openings 204 in a one-to-one correspondence, and the steel wire ropes 5 of the lifting components are located in the corresponding lifting equipment openings 204.

[0063] Specifically, in one embodiment, the connection point 4 includes a bucket screen steel structure keel suspension point 440 and two clamping slots 450, a pulley 430 and a bolt 420. The bucket screen steel structure keel suspension point 440 is set on the bucket screen steel structure keel 6; the two clamping slots 450 are set at intervals on the bucket screen steel structure keel suspension point 440; the pulley 430 has one end rotatably connected to one of the two clamping slots 450, and the other end of the pulley 430 is rotatably connected to the other clamping slot 450; the bolt 420 is used to fix the two clamping slots 450 on the bucket screen steel structure keel suspension point 440; and the other end of the steel wire rope 5 is fixed on the outer periphery of the pulley 430.

[0064] Specifically, in one embodiment, a connection assembly is further included, which includes a connection piece 620 and a screw 610. The connection piece 620 is provided with an opening limit groove, one end of the connection piece 620 is connected to the main screen 604 of the bucket screen, and a portion of the bucket screen steel structure keel 6 is located in the opening limit groove; the screw 610 is passed through the opening of the opening limit groove, the screw 610 is threadedly connected to the connection piece 620, and the screw 610 is used to fix the bucket screen steel structure keel 6 in the opening limit groove.

[0065] Specifically, in one embodiment, the bucket screen steel structure keel 6 includes an inner frame and an outer frame. The inner frame has its top connected to the lifting device 3, and the bottom of the inner frame is fixed with a bucket screen secondary screen 605; the outer frame is arranged on the outer periphery of the inner frame, and the bucket screen main screen 604 is fixed on the outer frame.

[0066] Specifically, in one embodiment, the outer frame is constructed as a polygonal pyramid, and the small end of the outer frame is closer to the bottom end of the inner frame than the large end of the polygonal pyramid.

[0067] Combine the following Figures 1 to 8 As shown, a complete embodiment of the present application is described below:

[0068] like Figure 1 As shown, the lifting platform 2 is fixed on the main steel structure truss 1, the bucket screen steel structure keel 6 is connected to the lifting platform 2 through the connection point 4, and the lifting equipment 3 on the lifting platform 2 drives the wire rope 5 to tighten to lift the bucket screen as a whole.

[0069] like Figure 2 As shown, the lifting platform 2 is lifted to a corresponding height by a crane, and the U-shaped clamp 120 is passed through the frame 110 , and both ends are fixed in the reserved holes on the horizontal angle steel 140 at the upper end of the vertical suspension rod 150 and fixed by nuts 130 .

[0070] like Figure 3 , Figure 4 As shown, the lifting platform 2 as a whole is composed of horizontal and vertical lifting platform I-beams 201, referred to as I-beams, forming a supporting frame, a steel grating plate 202 with a reserved lifting opening is laid on the I-beam, and the steel grating plate reserves a lifting equipment hole 204 in the lifting opening area. A guardrail 203 is provided on the outermost side of the I-beam of the lifting platform, and the lifting equipment 3 is placed in the lifting opening area. A cooperative control device 205 is provided in the middle area of ​​the lifting equipment, and the lifting equipment is controlled by the cooperative control device to achieve synchronous rotation.

[0071] like Figure 5 As shown, the lifting device 3 on the lifting platform 2 is an electric winch, and the electric winch base 330 is fixed on the I-beam 201 of the lifting platform. The motor 310 rotates to drive the drum 320 to tighten the wire rope 5.

[0072] like Figure 6 As shown, the lifting platform lowers the wire rope, and a pulley 430 is provided at the end of the wire rope, which is connected to the slot 450 on the bucket screen steel structure keel hanging point 440 and fixed with bolts 420. After the lifting equipment on the lifting platform tightens the wire rope, the bucket screen is lifted as a whole.

[0073] like Figure 7 As shown, a vertical hanging point 601 is arranged on the steel structure keel of the bucket screen, and the steel structure keel is assembled by horizontal vertical angle steel 602 and inclined angle steel 603. The main bucket screen 604 is arranged around, and the secondary bucket screen 605 is arranged in a circle at the bottom.

[0074] like Figure 8 As shown, a connecting piece 620 is provided on the back of the bucket screen, which is fixedly connected to the bucket screen steel structure keel angle steel by screws 610.

[0075] The steps for bucket screen lifting construction are as follows:

[0076] Step one: Assemble the horizontal and vertical I-beams of the lifting platform body on site, install the vertical hangers, and after the overall frame is installed, fix the lifting equipment and coordinated control device on the I-beams of the lifting platform, lay steel gratings on the I-beams, and install guardrails on the outside of the outermost I-beams.

[0077] Step 2: Use a crane to lift the entire lifting platform to the installation height, pass the U-shaped clamp through the main steel structure truss and lock it to the vertical boom of the lifting platform. After ensuring that the installation is firm, release the crane hook.

[0078] Step three: Assemble the bucket screen steel structure keel angle steel and diagonal angle steel, and install the bucket screen equipment on the keel.

[0079] Step 4: Move the assembled bucket screen to the corresponding position under the lifting platform, lower the wire rope on the lifting equipment to the ground, debug the lifting equipment and the coordinated control device to ensure that the retracted and released lengths of the wire rope are consistent, and then fix the hanging point slots on the bucket screen steel structure keel.

[0080] Step 5: Debug the lifting equipment and coordinated control device again to confirm that the equipment can work normally and lift the bucket screen as a whole to the specified height.

[0081] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0082] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0083] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

[0084] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0085] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0086] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A lifting device capable of adjusting the height of a bucket screen, characterized in that: include: Main steel structure truss; as well as A lifting platform, which is fixed on the main steel structure truss; as well as A lifting device fixed on the lifting platform; as well as A bucket screen steel structure keel is connected to the lifting device, a bucket screen main screen is fixed on the outer periphery of the bucket screen steel structure keel, and a bucket screen secondary screen is fixed at the bottom; Wherein, the lifting equipment is used to adjust the height of the bucket screen steel structure keel.

2. The lifting device for adjusting the height of the bucket screen according to claim 1 is characterized in that: The main steel structure truss comprises: Frame; and One end of a plurality of suspension fixing components arranged at intervals is fixed on the frame, and the other ends of the plurality of suspension fixing components are connected to the lifting platform.

3. The lifting device capable of adjusting the height of the bucket screen according to claim 2 is characterized in that: The suspension fixing assembly comprises: Transverse angles; and A hoop, which fixes the transverse angle steel to the frame; and A vertical suspension rod, one end of which is connected to the transverse angle steel, and the other end of which is connected to the lifting platform.

4. The lifting device capable of adjusting the height of the bucket screen according to claim 1, characterized in that: The lifting device comprises a plurality of lifting assemblies arranged at intervals on the lifting platform, which comprises: an electric winch base, which is arranged on the lifting platform; and A motor, which is arranged on the electric winch base; and a rotating shaft connected to the rotating shaft of the motor; and a reel, which is sleeved on the rotating shaft, and the reel can rotate synchronously with the rotating shaft; and a steel wire rope, one end of which is fixed to the outer circumference of the drum; and A connection point, one end of which is connected to the other end of the steel wire rope, and the other end of the connection point is connected to the keel of the bucket screen steel structure; Wherein, the motor can drive the rotating shaft to drive the reel to rotate so as to reel in the steel wire rope.

5. The lifting device capable of adjusting the height of the bucket screen according to claim 4 is characterized in that: It also includes a cooperative control device, which is electrically connected to the multiple lifting components at the same time and is used to control the synchronous movement of the multiple lifting components.

6. The lifting device capable of adjusting the height of the bucket screen according to claim 5, characterized in that: The lifting platform comprises: Steel grating; and A plurality of lifting platform I-beams, which are arranged at the bottom of the steel grating plate; and A guardrail, which is arranged on the outer periphery of the steel grating plate; Wherein, the collaborative control device is arranged on the steel grating plate, a plurality of lifting equipment openings are arranged on the steel grating plate, a plurality of lifting components are arranged one by one at the plurality of lifting equipment openings, and the steel wire ropes of the lifting components are located in the corresponding lifting equipment openings.

7. The lifting device capable of adjusting the height of the bucket screen according to claim 4, characterized in that: The connection points include: A steel structure keel hanging point, which is arranged on the bucket screen steel structure keel; and Two slots are arranged at intervals on the steel structure keel suspension points; and a pulley, one end of which is rotatably connected to one of the two slots, and the other end of which is rotatably connected to the other slot; and Bolts, used to fix the two slots on the steel structure keel hanging points; Wherein, the other end of the steel wire rope is fixed on the outer circumference of the pulley.

8. The lifting device capable of adjusting the height of the bucket screen according to claim 1, characterized in that: Also included is a connection assembly comprising: A connecting piece, on which an opening limit groove is provided, one end of the connecting piece is connected to the main screen of the bucket screen, and the keel part of the bucket screen steel structure is located in the opening limit groove; and A screw is passed through the opening of the opening limiting groove, the screw is threadedly connected to the connecting piece, and the screw is used to fix the bucket screen steel structure keel in the opening limiting groove.

9. The lifting device capable of adjusting the height of the bucket screen according to claim 8, characterized in that: The bucket screen steel structure keel includes: An inner frame, the top of which is connected to the lifting device, and the bottom of which is fixed with the bucket screen and secondary screen; and The outer frame is arranged on the outer periphery of the inner frame, and the main screen of the bucket screen is fixed on the outer frame.

10. The lifting device capable of adjusting the height of the bucket screen according to claim 9, characterized in that: The outer frame is constructed as a polygonal pyramid, and its small end is closer to the bottom end of the inner frame than the large end of the polygonal pyramid.