A protective lifting device for bridge construction

Abstract

The present invention belongs to the technical field of lifting devices, and specifically relates to a protective lifting device for bridge construction, comprising two guardrail assemblies, which are arranged relatively to each other; the guardrail assembly comprises a fixed hanging plate, a lifting guardrail, a side guardrail and a fixed plate; there are two side guardrails, which are slidably arranged on both sides of the lifting guardrail respectively, and a driving mechanism is provided on the lifting guardrail, and the two side guardrails are driven to move by the driving mechanism; a lifting assembly is provided between the fixed hanging plate and the lifting guardrail, and the lifting guardrail is driven to move up and down by the lifting assembly; the fixed plate is slidably connected to the lifting guardrail, and a first spring assembly is provided between the fixed plate and the lifting guardrail; the two guardrail assemblies are arranged relatively to each other and can form a complete hanging basket, which can be used as a sling; at the same time, it is located at the bridge pier, and can protect the bridge pier; that is, the present lifting device has both sling and protection functions.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting devices, and in particular relates to a protective lifting device for bridge construction. Background Art

[0002] Box girder erection is an aerial operation, and the bridge erection machine is operated between the bridge piers. Construction workers need to work on the bridge piers, but there are no protective facilities around the bridge piers before the box girder is erected. If protective devices are installed on the bridge piers in advance, there are disadvantages of large engineering workload and high construction costs.

[0003] At the same time, when the bridge erection machine is working, construction workers often need to walk on both sides of the bridge deck, which poses a risk of falling from height. The temporary steel pipe or square pipe welded guardrail currently used needs to be manually moved and installed after the bridge erection machine installs the beam body. There are problems such as no protection before installation and high labor intensity and low efficiency of manual movement.

[0004] The invention patent with the patent application number 201010292138.5 discloses a bridge erection machine guardrail, which is attached to the legs of the bridge erection machine and does not require additional power to move. The overall working state (protection state, moving state) can be changed as needed by retracting the steering rod. However, it has a single function, poor overall strength, and only has a protective effect; and it needs to be manually operated to lock, which has certain inconveniences and safety hazards.

[0005] The invention patent application with patent application number 202310848812.0 discloses a bridge erection machine protection and hoisting integrated device, which uses a winch to tighten the protective rope through a steel wire rope to form a temporary guardrail (double-line guardrail); at the same time, the combination of the steel wire rope, the winch and the first single-wheel pulley can also be used to hoist objects on the bridge. That is, the device can not only achieve protection but also achieve lifting; but it can only provide edge protection for the bridge deck and lacks protection for the bridge piers. Moreover, during the lifting process, the above-mentioned steel wire rope will be used, thereby turning the guardrail into a single-line guardrail, thereby reducing the protective effect. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a protective lifting device for bridge construction, which can not only protect the bridge piers but also realize lifting.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A protective hoisting device for bridge construction comprises two guardrail assemblies, the two guardrail assemblies are arranged opposite to each other;

[0009] The guardrail assembly comprises a fixed hanging plate, a lifting guardrail, a side guardrail and a fixed plate; two side guardrails are provided, and the two side guardrails are respectively slidably arranged on both sides of the lifting guardrail, and a driving mechanism is provided on the lifting guardrail, and the two side guardrails are driven to move by the driving mechanism;

[0010] A lifting assembly is provided between the fixed lifting plate and the lifting guardrail, and the lifting guardrail is driven to move up and down by the lifting assembly; the fixed plate is slidably connected to the lifting guardrail, and a first spring assembly is provided between the fixed plate and the lifting guardrail;

[0011] The upper end of the fixed plate is fixedly connected with a plug-in shaft plugged with the fixed hanging plate; the lower end of the fixed plate is fixedly connected with the top plate; a connecting plate is fixedly connected between the two side guardrails, and a first push plate in contact with the top plate is fixed on the connecting plate;

[0012] It also includes a plug-in mechanism, which includes a plug-in rod and a plug-in seat, and the plug-in seat is provided with a plug-in hole plugged with the plug-in rod; the plug-in rod is fixedly connected to the side guardrail on one side of one guardrail assembly, and the plug-in seat is fixedly connected to the side guardrail on one side of the other guardrail assembly.

[0013] The guardrail assembly also includes a support wheel group; the support wheel group includes a support arm and a support wheel, the support arm is slidably connected to the lower end of the lifting guardrail, and a second spring assembly is provided between the support arm and the lifting guardrail; the support wheel is rotatably arranged at the lower end of the support arm; the lower end of the side guardrail is fixedly connected to a second push plate in contact with the support arm.

[0014] The second spring assembly includes a guide rod and a second spring. The guide rod is fixedly connected to the lifting guardrail, the support arm is slidably connected to the guide rod, the second spring is sleeved outside the guide rod, and the two ends of the second spring are respectively in contact with the support arm and the guide rod.

[0015] The lifting assembly includes a fixed pulley and a winch, wherein the winch is fixedly arranged on the lifting guardrail, and the fixed pulley is arranged on the fixed hanging plate. One end of the steel wire rope of the winch passes over the fixed pulley and is fixedly connected to the lifting guardrail.

[0016] The driving mechanism includes a dual-axis motor and a driving rack. A driving rack is provided on each side guardrail. The housing of the dual-axis motor is fixedly connected to the lifting guardrail. Driving gears are respectively fixed at both ends of the output shaft of the dual-axis motor, and each driving gear is meshed with the corresponding driving rack.

[0017] The first spring assembly includes a connecting column and a first spring. The connecting column is fixedly connected to the lifting guardrail. The fixing plate is slidably connected to the connecting column. The first spring is sleeved outside the connecting column. The two ends of the first spring are respectively in contact with the fixing plate and the lifting guardrail.

[0018] The guardrail assembly also includes a retractable guardrail, which is slidably connected to the fixed hanging plate, and a driving cylinder is provided between the fixed hanging plate and the retractable guardrail; a fixed track is provided on the retractable guardrail, and a fixed guide groove is provided on the lifting guardrail to be plugged into the fixed track.

[0019] The fixed rail is a dovetail guide rail.

[0020] The connecting plate is provided with a slot connected to the lifting guardrail.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The two guardrail components are arranged opposite to each other and can form a complete hanging basket, which can be used as a lifting device; at the same time, when it is located at the bridge pier, it can protect the bridge pier; that is, the lifting device has two functions of lifting device and protection. The two side guardrails are moved by the driving mechanism to achieve opening and closing docking, thereby saving manual work.

[0023] The movement of the two side guardrails can drive the plug-in shaft to plug into the fixed hanging plate, which can play a double insurance role during the protection process.

[0024] A supporting wheel set is provided, which can contact with and move along the bridge pier when used as a hoist. The bridge pier plays a guiding role to avoid unnecessary shaking during the lifting process.

[0025] The setting of the retractable guardrail can not only protect the bridge deck, but also realize the connection between the fixed hanging plate and the lifting guardrail to avoid shaking during the transfer to the next pier. At the same time, when the device is used as a hoist, it will not affect the protection of the bridge deck by the retractable guardrail. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of one aspect of the present invention;

[0027] Figure 2 It is a structural schematic diagram of another aspect of the present invention;

[0028] Figure 3 It is a front view of the present invention;

[0029] Figure 4 is a side view of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the lifting guardrail of the present invention;

[0031] Figure 6 It is a structural schematic diagram of one direction of connection between the side guardrail and the fixing plate of the present invention;

[0032] Figure 7It is a structural schematic diagram of another direction in which the side guardrail of the present invention is connected to the fixing plate;

[0033] Figure 8 This is a schematic diagram of the use state of one direction of the present invention;

[0034] Fig. 9 This is a schematic diagram of the use state of another direction of the present invention;

[0035] Among them: 1 is a guardrail assembly, 2 is a fixed hanging plate, 3 is a lifting guardrail, 4 is a side guardrail, 5 is a fixed plate, 6 is a driving mechanism, 60 is a dual-axis motor, 61 is a driving rack, 62 is a driving gear, 7 is a lifting assembly, 70 is a fixed pulley, 71 is a winch, 72 is a wire rope, 8 is a first spring assembly, 80 is a connecting column, 81 is a first spring, 9 is a plug-in shaft, 10 is a top plate, 11 is a connecting plate, 110 is a slot, 1 2 is the first push plate, 13 is the supporting wheel group, 130 is the supporting arm, 131 is the supporting wheel, 132 is the supporting plate, 14 is the second spring assembly, 140 is the guide rod, 141 is the second spring, 15 is the second push plate, 16 is the plug-in mechanism, 160 is the plug-in rod, 161 is the plug-in seat, 17 is the retractable guardrail, 18 is the driving cylinder, 19 is the fixed track, 20 is the fixed guide groove, 21 is the bridge erecting machine, 22 is the bridge pier, and 23 is the bridge deck. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] like Figure 1-9 As shown, a protective lifting device for bridge construction includes two guardrail assemblies 1, which are arranged opposite to each other and can form a complete hanging basket; the hanging basket can not only be used as a lifting tool, but also can be used as a protective tool when it is located at the bridge pier 22.

[0038] The two guardrail assemblies 1 have the same structure, and both include a fixed hanging plate 2, a lifting guardrail 3, a side guardrail 4 and a fixed plate 5. The fixed hanging plate 2 is fixed to the legs of the bridge erecting machine 21 as required, and can be fixedly connected by bolts.

[0039] There are two side guardrails 4, which are slidably arranged on both sides of the lifting guardrail 3. The lifting guardrail 3 is provided with a driving mechanism 6, which drives the two side guardrails 4 to move. When the two side guardrails 4 move inward, the two guardrail assemblies 1 are closed to form a complete hanging basket. When the two side guardrails 4 move outward, the two guardrail assemblies 1 are opened and can be transferred to the next pier 22 for continued use.

[0040] A lifting assembly 7 is provided between the fixed hanging plate 2 and the lifting guardrail 3. The lifting guardrail 3 is driven up and down by the lifting assembly 7, so that it can be used as a lifting device to lift objects under the bridge.

[0041] The fixed plate 5 is slidably connected to the lifting guardrail 3, and a first spring assembly 8 is provided between the fixed plate 5 and the lifting guardrail 3; when the fixed plate 5 slides inward, the first spring assembly 8 generates elastic potential energy. A plug-in shaft 9 plugged into the fixed hanging plate 2 is fixedly connected to the upper end of the fixed plate 5, and a corresponding plug hole is provided on the fixed hanging plate 2. A top plate 10 is fixedly connected to the lower end of the fixed plate 5; a connecting plate 11 is fixedly connected between the two side guardrails 4, and a first push plate 12 in contact with the top plate 10 is fixed on the connecting plate 11.

[0042] When used as a protective device, the lifting guardrail 3 is driven by the lifting assembly 7 to rise to the upper end of the pier 22, that is, the plug-in shaft 9 is opposite to the plug-in hole of the fixed hanging plate 2. When the two side guardrails 4 move inward, the two guardrail assemblies 1 are closed to form a complete hanging basket. During the movement, the top plate 10 and the fixed plate 5 are pushed by the first push plate 12 to move accordingly, so that the plug-in shaft 9 is plugged into the fixed hanging plate 2.

[0043] With this structural arrangement, when used as a protective device, the plug-in shaft 9 can be plugged into the fixed hanging plate 2 to play a double insurance role.

[0044] It also includes a plug-in mechanism 16, which includes a plug-in rod 160 and a plug-in seat 161, and the plug-in seat 161 is provided with a socket that is plugged with the plug-in rod 160; the plug-in rod 160 is fixedly connected to the side guardrail 4 on one side of one of the guardrail assemblies 1, and the plug-in seat 161 is fixedly connected to the side guardrail 4 on one side of the other guardrail assembly 1.

[0045] When the two side guardrails 4 move inward, the two guardrail assemblies 1 are closed to form a complete hanging basket, and the plug-in rod 160 is plugged into the plug-in seat 161; the overall connection strength can be improved by plugging the plug-in rod 160 into the plug-in seat 161. When the two side guardrails 4 move outward, the two guardrail assemblies 1 are opened, and the plug-in rod 160 and the plug-in seat 161 can be completely separated.

[0046] When the protective equipment is converted into a sling, it is also necessary to first move outward through the two side guardrails 4. The first spring assembly 8 releases elastic potential energy, pushes the fixed plate 5 to slide outward, and drives the plug-in shaft 9 away from the fixed hanging plate 2 until the two are separated; at this time, the plug-in rod 160 and the plug-in seat 161 are still in the plug-in state. Then the lifting guardrail 3 is driven downward by the lifting assembly 7. When it moves down to the plug-in shaft 9 below the fixed hanging plate 2, the two side guardrails 4 are moved inward (at this time, the plug-in shaft 9 is not plugged with the fixed hanging plate 2 and will not affect the downward movement), and the two guardrail assemblies 1 are closed to form a complete hanging basket.

[0047] Furthermore, a card slot 110 connected to the lifting guardrail 3 is provided on the connecting plate 11; when the two side guardrails 4 move inward, the card slot 110 on the connecting plate 11 will be plugged into the lifting guardrail 3; the connection strength between the two side guardrails 4 and the lifting guardrail 3 can be improved.

[0048] Furthermore, the first spring assembly 8 includes a connecting column 80 and a first spring 81. The connecting column 80 is fixedly connected to the lifting guardrail 3. The fixing plate 5 is slidably connected to the connecting column 80. The first spring 81 is sleeved outside the connecting column 80. The two ends of the first spring 81 are in contact with the fixing plate 5 and the lifting guardrail 3, respectively. When the fixing plate 5 moves along the connecting column 80, the first spring 81 is compressed to generate elastic potential energy. When the external force is removed, the first spring 81 releases the elastic potential energy and drives the fixing plate 5 to reset.

[0049] Further, the guardrail assembly 1 also includes a support wheel assembly 13; the support wheel assembly 13 includes a support arm 130 and a support wheel 131, the support arm 130 is slidably connected to the lower end of the lifting guardrail 3, and a second spring assembly 14 is provided between the support arm 130 and the lifting guardrail 3; the support wheel 131 is rotatably arranged at the lower end of the support arm 130. The lower end of the side guardrail 4 is fixedly connected to a second push plate 15 in contact with the support arm 130; specifically, a support plate 132 is provided on the support arm 130; the second push plate 15 contacts the support plate 132 and pushes the support arm 130 to move.

[0050] When used as a hoist, the two side guardrails 4 move inwards, and the second push plate 15 drives the support arm 130 to move inwards until the support wheel 131 contacts the bridge pier 22. In this way, during the up and down movement, on the one hand, unnecessary contact between the side guardrails 4 and the bridge pier 22 can be avoided; on the other hand, the support wheel 131 cooperates with the bridge pier 22 to guide the side guardrails 4 during the downward movement, thereby avoiding unnecessary shaking during the lifting process.

[0051] Furthermore, the second spring assembly 14 includes a guide rod 140 and a second spring 141. The guide rod 140 is fixedly connected to the lifting guardrail 3, the support arm 130 is slidably connected to the guide rod 140, and the second spring 141 is sleeved outside the guide rod 140. The two ends of the second spring 141 are in contact with the support arm 130 and the guide rod 140 respectively. When the second push plate 15 pushes the support arm 130 to move, the support arm 130 moves along the guide rod 140 and compresses the second spring 141, so that the second spring 141 generates elastic potential energy. When the two side guardrails 4 move outward, the second spring 141 releases the elastic potential energy and pushes the support arm 130 to move outward.

[0052] Further, the lifting assembly 7 includes a fixed pulley 70 and a winch 71, the winch 71 is fixedly arranged on the lifting guardrail 3, the fixed pulley 70 is arranged on the fixed hanging plate 2, and one end of the wire rope 72 of the winch 71 passes around the fixed pulley 70 and is fixedly connected to the lifting guardrail 3. The winch 71 retracts and releases the wire rope 72 to drive the lifting guardrail 3 to move up and down.

[0053] Furthermore, the driving mechanism 6 includes a dual-axis motor 60 and a driving rack 61. A driving rack 61 is provided on each side guardrail 4. The outer casing of the dual-axis motor 60 is fixedly connected to the lifting guardrail 3. Driving gears 62 are respectively fixed at both ends of the output shaft of the dual-axis motor 60, and each driving gear 62 is meshed with the corresponding driving rack 61.

[0054] The output shaft of the dual-axis motor 60 drives the driving gear 62 to rotate, and the side guardrail 4 can be driven to move by the engagement of the driving gear 62 with the driving rack 61. As long as the forward and reverse rotation of the dual-axis motor 60 is controlled, the side guardrail 4 can be moved inward or outward.

[0055] Furthermore, the above structure can only protect the bridge pier 22, but lacks protection for the bridge deck 23; therefore, the following structure is also provided:

[0056] The guardrail assembly 1 also includes a retractable guardrail 17, which is slidably connected to the fixed hanging plate 2, and a driving cylinder 18 is provided between the fixed hanging plate 2 and the retractable guardrail 17. A fixed rail 19 is provided on the retractable guardrail 17, and a fixed guide groove 20 plugged into the fixed rail 19 is provided on the lifting guardrail 3.

[0057] By extending the driving cylinder 18, the retractable guardrail 17 moves to protect the bridge deck 23. After the driving cylinder 18 is extended, the fixed track 19 on the retractable guardrail 17 does not plug into the fixed guide groove 20 on the lifting guardrail 3; therefore, it does not affect the up and down movement of the lifting guardrail 3. When it is necessary to transfer to the next pier 22, the driving cylinder 18 is retracted to plug the fixed track 19 on the retractable guardrail 17 into the fixed guide groove 20 on the lifting guardrail 3; the connection between the fixed hanging plate 2 and the lifting guardrail 3 can be achieved by retracting the guardrail 17, thereby preventing the lifting guardrail 3 from shaking when transferring to the next pier 22.

[0058] Furthermore, the fixed rail 19 is a dovetail-shaped guide rail; the fixed guide groove 20 is also a corresponding dovetail-shaped through groove.

[0059] Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments.

Claims

1. A protective lifting device for bridge construction, characterized in that: It comprises two guardrail assemblies (1), the two guardrail assemblies (1) are arranged opposite to each other; The guardrail assembly (1) comprises a fixed hanging plate (2), a lifting guardrail (3), a side guardrail (4) and a fixed plate (5); two side guardrails (4) are provided, and the two side guardrails (4) are respectively slidably arranged on both sides of the lifting guardrail (3); a driving mechanism (6) is provided on the lifting guardrail (3), and the two side guardrails (4) are driven to move by the driving mechanism (6); A lifting assembly (7) is provided between the fixed lifting plate (2) and the lifting guardrail (3), and the lifting guardrail (3) is driven to move up and down by the lifting assembly (7); the fixed plate (5) is slidably connected to the lifting guardrail (3), and a first spring assembly (8) is provided between the fixed plate (5) and the lifting guardrail (3); The upper end of the fixed plate (5) is fixedly connected to a plug-in shaft (9) plugged into the fixed hanging plate (2); the lower end of the fixed plate (5) is fixedly connected to a top plate (10); a connecting plate (11) is fixedly connected between the two side guardrails (4), and a first push plate (12) in contact with the top plate (10) is fixed on the connecting plate (11); The invention also comprises a plug-in mechanism (16), the plug-in mechanism (16) comprising a plug-in rod (160) and a plug-in seat (161), the plug-in seat (161) being provided with a plug hole plugged with the plug-in rod (160); the plug-in rod (160) is fixedly connected to a side guardrail (4) on one side of one guardrail assembly (1), and the plug-in seat (161) is fixedly connected to a side guardrail (4) on one side of another guardrail assembly (1).

2. A protective lifting device for bridge construction according to claim 1, characterized in that: The guardrail assembly (1) further comprises a supporting wheel assembly (13); the supporting wheel assembly (13) comprises a supporting arm (130) and a supporting wheel (131); the supporting arm (130) is slidably connected to the lower end of the lifting guardrail (3); a second spring assembly (14) is provided between the supporting arm (130) and the lifting guardrail (3); the supporting wheel (131) is rotatably arranged at the lower end of the supporting arm (130); and the lower end of the side guardrail (4) is fixedly connected to a second push plate (15) in contact with the supporting arm (130).

3. A protective lifting device for bridge construction according to claim 2, characterized in that: The second spring assembly (14) comprises a guide rod (140) and a second spring (141); the guide rod (140) is fixedly connected to the lifting guardrail (3); the support arm (130) is slidably connected to the guide rod (140); the second spring (141) is sleeved outside the guide rod (140); and two ends of the second spring (141) are in contact with the support arm (130) and the guide rod (140), respectively.

4. The protective lifting device for bridge construction according to claim 1 is characterized in that: The lifting assembly (7) comprises a fixed pulley (70) and a winch (71), wherein the winch (71) is fixedly arranged on the lifting guardrail (3), and the fixed pulley (70) is arranged on the fixed hanging plate (2), and one end of the steel wire rope (72) of the winch (71) passes over the fixed pulley (70) and is fixedly connected to the lifting guardrail (3).

5. The protective lifting device for bridge construction according to claim 1 is characterized in that: The driving mechanism (6) comprises a dual-axis motor (60) and a driving rack (61), each side guardrail (4) is provided with a driving rack (61), the housing of the dual-axis motor (60) is fixedly connected to the lifting guardrail (3), and driving gears (62) are respectively fixed at both ends of the output shaft of the dual-axis motor (60), and each driving gear (62) is meshed with the corresponding driving rack (61).

6. The protective lifting device for bridge construction according to claim 1, characterized in that: The first spring assembly (8) comprises a connecting column (80) and a first spring (81), wherein the connecting column (80) is fixedly connected to the lifting guardrail (3), the fixing plate (5) is slidably connected to the connecting column (80), and the first spring (81) is sleeved outside the connecting column (80), and the two ends of the first spring (81) are in contact with the fixing plate (5) and the lifting guardrail (3), respectively.

7. The protective lifting device for bridge construction according to claim 1 is characterized in that: The guardrail assembly (1) further comprises a retractable guardrail (17), wherein the retractable guardrail (17) is slidably connected to the fixed hanging plate (2), and a driving cylinder (18) is provided between the fixed hanging plate (2) and the retractable guardrail (17); a fixed rail (19) is provided on the retractable guardrail (17), and a fixed guide groove (20) plugged into the fixed rail (19) is provided on the lifting guardrail (3).

8. The protective lifting device for bridge construction according to claim 7, characterized in that: The fixed rail (19) is a dovetail guide rail.

9. The protective lifting device for bridge construction according to claim 1, characterized in that: The connecting plate (11) is provided with a slot (110) connected to the lifting guardrail (3).

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