Lifting appliance for dismantling simply supported beam

Abstract

The utility model relates to the technical field of suspension devices, in particular to a lifting appliance for dismantling a simply supported beam. Comprising a cross arm, a suspension lug is arranged on the upper portion of the cross arm, a rotatable push-pull piece is arranged in front of the cross arm, and stoppers are symmetrically arranged on the two sides of the front portion of the cross arm; the extension arms are used in pairs and are in sliding connection with the two ends of the cross arm respectively, one end of each extension arm is provided with a movable claw, the other end of each extension arm is provided with an installation shaft connected with the push-pull piece, and the front portion of each extension arm is provided with an inner tooth groove making contact with the corresponding retainer; the suspension device can be stably and reliably in contact with a beam body, auxiliary limiting is not needed, meanwhile, in the suspension process, the slippage situation is avoided, the suspension stability is improved, operation and construction are integrally convenient, and the construction difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of suspension devices, in particular to a suspension device for dismantling a simply supported beam. Background Art

[0002] During bridge maintenance work, part of the bridge structure needs to be dismantled for replacement. For this purpose, the replacement part is usually separated from the main beam of the simply supported beam, and then a crane is used in conjunction with a lifting device to complete the dismantling work. However, during the current lifting process, there is often no lifting device that is in stable contact with the beam body, and the lifting device needs to be assisted in limiting the position before lifting. The wire rope binding suspension method also has the risk of slipping, which increases the construction difficulty during the actual lifting process and reduces work efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lifting device for dismantling a simply supported beam in response to the above-mentioned technical deficiencies. The lifting device can stably and reliably contact the beam body without the need for auxiliary limiting. At the same time, during the suspension process, the occurrence of slippage is avoided, the stability of the suspension is improved, and the overall operation and construction are convenient, reducing the difficulty of construction.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model includes:

[0005] A horizontal arm, wherein a suspension ear is provided on the top of the horizontal arm, a rotatable push-pull member is provided in the front, and stoppers are symmetrically provided on both sides of the front of the horizontal arm;

[0006] The extension arm is used in pairs and is slidably connected to the two ends of the cross arm respectively. One end of the extension arm is provided with a movable claw, and the other end is provided with a mounting shaft connected to the push-pull member. The front of the extension arm is provided with an internal tooth groove that contacts the stopper.

[0007] Preferably, the push-pull member is provided with a positioning sleeve which is threadedly connected to the mounting shaft.

[0008] Preferably, a guide groove is provided on the extension arm; and a guide rail connected to the guide groove is provided inside the cross arm.

[0009] Preferably, fixing holes are symmetrically provided on the cross arm; the stopper includes a support plate and a pressure plate; the support plate is slidably connected to the fixing hole, and an adjustment rod connected to the cross arm is provided in the middle; the pressure plate is slidably connected to the support plate, and a spring in contact with the support plate is symmetrically provided on one side of the pressure plate, and an external clamping tooth is provided on the other side.

[0010] Preferably, a positioning protrusion is provided on the support plate.

[0011] Preferably, a limit clamping hole is provided at the end of the extension arm; and a limit strip cooperating with the limit clamping hole is provided on the movable claw.

[0012] Preferably, the length of the limiting strip is smaller than the length of the movable claw.

[0013] Preferably, a plurality of threaded holes are evenly arranged on the upper surface of the cross arm.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The extension arms are driven to retract through push-pull pieces, and the stoppers are used for positioning to ensure the stability of the movable claws after contact with the beam body, prevent loosening, and eliminate the need for auxiliary positioning, while improving the stability during the suspension process;

[0016] 2. After the stopper contacts the inner tooth groove, the extension arm can be limited in one direction to prevent the movable claw from slipping outward again after contacting the beam body, thus effectively ensuring the overall stability;

[0017] 3. The two extension arms can be retracted and adjusted separately through the push-pull parts to reduce labor intensity, and the rotatable push-pull parts can adjust the extension arms one by one, and the structural design is reasonable;

[0018] 4. The movable claws are in contact with the steps on the side wall of the beam to achieve suspension fixation. Compared with wire rope binding operations, the construction difficulty is effectively reduced and work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a lifting device for dismantling a simply supported beam;

[0020] Figure 2 It is a schematic diagram of the lifting state of the movable claw;

[0021] Figure 3 It is a schematic diagram of the connection between the push-pull member and the mounting shaft;

[0022] Figure 4 is a schematic diagram of the extension arm structure;

[0023] Figure 5 is a schematic diagram of the structure of the movable claw;

[0024] Figure 6 A schematic diagram of the stopper structure;

[0025] Figure 7 It is a schematic diagram of the cross arm structure;

[0026] Figure 8 It is a schematic diagram of the positioning sleeve structure.

[0027] In the figure: 1, horizontal arm; 2, stopper; 3, extension arm; 4, movable claw; 101, suspension ear; 102, push-pull member; 103, positioning sleeve; 104, guide rail; 105, fixing hole; 106, threaded hole; 201, support plate; 202, pressure plate; 203, adjustment rod; 204, spring; 205, external clamping tooth; 206, positioning protrusion; 301, installation shaft; 302, internal tooth groove; 303, guide groove; 304, clamping hole; 401, limit strip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0029] Specific implementation method 1: Combination Figure 1-8 As shown, a lifting device for dismantling a simply supported beam comprises: a cross arm 1, a suspension ear 101 is provided on the top of the cross arm 1, a rotatable push-pull member 102 is provided in the front, and stop members 2 are symmetrically provided at both sides of the front of the cross arm 1; an extension arm 3, the extension arms 3 are used in pairs, and the two extension arms 3 are respectively inserted into the two ends of the cross arm 1 to form a sliding connection, one end of the extension arm 3 is provided with a movable claw 4, and the other end is provided with a mounting shaft 301 connected with the push-pull member 102, and the front of the extension arm 3 is provided with an internal tooth groove 302 in contact with the stop member 2; wherein the push-pull member 102 can adopt a hydraulic cylinder.

[0030] A preferred embodiment, in combination with Figure 2 , Figure 3 and Figure 8 As shown, a positioning sleeve 103 is provided on the push-pull member 102 and is threadedly connected to the installation shaft 301. The positioning sleeve 103 is threadedly connected to the installation shaft 301, and the outer circle is sleeved with the end of the push-pull member 102, so as to realize quick installation and disassembly between the push-pull member 102 and the installation shaft 301, which is convenient for operation.

[0031] A preferred embodiment, in combination with Figure 4 and Figure 7 As shown, the upper and lower surfaces of the extension arm 3 are both provided with guide grooves 303; a guide rail 104 corresponding to the guide groove 303 is provided inside the cross arm 1, and the contact between the two effectively improves the stability and accuracy of the extension arm 3 during displacement.

[0032] A preferred embodiment, in combination with Figure 4 , Figure 6 and Figure 7As shown, rectangular fixing holes 105 are symmetrically arranged on both sides of the front of the cross arm 1; the stopper 2 includes a support plate 201 and a pressure plate 202; the support plate 201 is installed inside the fixing hole 105 to form a sliding connection, and an adjusting rod 203 connected to the cross arm 1 is arranged in the middle, one end of the adjusting rod 203 is rotatably connected to the cross arm 1, and the other end is threadedly connected to the support plate 201, and sliding columns are symmetrically arranged on the pressure plate 202, and the sliding columns are slidably connected to the support plate 201, and a spring 202 in contact with the support plate 201 is sleeved on the sliding column 4. An outer tooth 205 is provided on the other side of the pressure plate 202, and the outer tooth 205 contacts the inner tooth groove 302 to realize one-way limiting of the extension arm 3; when the extension arm 3 slides toward the inside of the cross arm 1, the inner tooth groove 302 pushes the pressure plate 202 to move, overcomes the elastic force of the spring 204, and does not limit the extension arm 3. When sliding outward, the outer tooth 205 engages with the inner tooth groove 302 to achieve limiting, and by rotating the adjusting rod 203, the support plate 201 can be pulled to move, driving the pressure plate 202 to break contact with the inner tooth groove 302.

[0033] A preferred embodiment, in combination with Figure 6 and Figure 7 As shown, a positioning protrusion 206 is provided on the support plate 201, and a corresponding notch is provided in the fixing hole 105. The positioning protrusion 206 contacts the notch to improve the stability of the support plate 201 during displacement. Specific implementation method 2

[0035] Combination Figure 4 and Figure 5 As shown, a limit hole 304 is provided at the end of the extension arm 3; a limit bar 401 cooperating with the limit hole 304 is provided on the movable claw 4. The limit bar 401 is connected to the limit hole 304 to prevent the movable claw 4 from rotating circumferentially and achieve positioning.

[0036] In a preferred embodiment, the length of the limiting strip 401 is smaller than the length of the movable claw 4. In a non-working state, the limiting strip 401 can be in contact with the upper surface of the extension arm 3, so that the movable claw 4 is in a retracted state. Specific implementation method three

[0038] Combination Figure 1 and Figure 2 As shown, a plurality of threaded holes 106 are evenly arranged on the upper surface of the cross arm 1, and the installation position of the suspension ear 101 can be adjusted according to the suspension situation, so as to facilitate the adjustment of balance.

[0039] Working principle:

[0040] Place the cross arm 1 on the bridge deck, and pull the extension arm 3 out of the cross arm 1, adjust the position of the movable claw 4 so that it can fully contact the side of the beam during lifting, then adjust the length of the push-pull member 102, and connect it to the mounting shaft 301 on the extension arm 3 through the positioning sleeve 103, and then the push-pull member 102 contracts, pulling the extension arm 3 to move toward the inside of the cross arm 1, so that the movable claw 4 can fully contact with the beam body, and use the stopper 2 to prevent the extension arm 3 from moving outward again, and then adjust the extension arm 3 on the other side again, and then you can carry out the suspension operation. After the operation is completed, there is no need to perform auxiliary limiting on the sling, and the movable claw 4 can maintain a stable connection with the beam body to ensure stability and reliability during lifting.

[0041] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A lifting device for dismantling a simply supported beam, characterized in that: include: A cross arm (1), wherein a suspension ear (101) is provided on the top of the cross arm (1), a rotatable push-pull member (102) is provided in the front, and stop members (2) are symmetrically provided on both sides of the front of the cross arm (1); An extension arm (3) is used in pairs and is slidably connected to the two ends of the cross arm (1), one end of the extension arm (3) is provided with a movable claw (4), and the other end is provided with a mounting shaft (301) connected to the push-pull member (102), and the front of the extension arm (3) is provided with an internal tooth groove (302) that contacts the stop member (2).

2. A lifting device for dismantling a simply supported beam according to claim 1, characterized in that: The push-pull member (102) is provided with a positioning sleeve (103) threadedly connected to the mounting shaft (301).

3. The lifting device for dismantling a simply supported beam according to claim 1, characterized in that: The extension arm (3) is provided with a guide groove (303); and the cross arm (1) is provided with a guide rail (104) connected to the guide groove (303) inside.

4. The lifting device for dismantling a simply supported beam according to claim 1, characterized in that: The cross arm (1) is symmetrically provided with fixing holes (105); the stopper (2) comprises a support plate (201) and a pressure plate (202); the support plate (201) is slidably connected to the fixing hole (105), and an adjusting rod (203) connected to the cross arm (1) is provided in the middle; the pressure plate (202) is slidably connected to the support plate (201), a spring (204) in contact with the support plate (201) is symmetrically provided on one side of the pressure plate (202), and an external clamping tooth (205) is provided on the other side.

5. The lifting device for dismantling a simply supported beam according to claim 4, characterized in that: The support plate (201) is provided with a positioning protrusion (206).

6. The lifting device for dismantling a simply supported beam according to claim 1, characterized in that: A limiting clamping hole (304) is provided at the end of the extension arm (3); and a limiting strip (401) cooperating with the limiting clamping hole (304) is provided on the movable claw (4).

7. The lifting device for dismantling a simply supported beam according to claim 6, characterized in that: The length of the limiting strip (401) is smaller than the length of the movable claw (4).

8. The lifting device for dismantling a simply supported beam according to claim 1, characterized in that: The upper surface of the cross arm (1) is evenly provided with a plurality of threaded holes (106).

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