Method for exchanging tripod guide pulley by using supporting assembly

Abstract

The invention provides a method for exchanging a tripod guide pulley by using a supporting assembly, which comprises the following steps of: pulling the guide pulley by using a pulling piece arranged on the supporting assembly, enabling the pulling force of the pulling piece to be equal to the gravity of the guide pulley, disassembling the guide pulley, and respectively hoisting a main hook guide pulley and an auxiliary hook guide pulley to a preset height; then, the auxiliary hook guide pulley is pulled to deviate by a certain angle, so that the main hook guide pulley avoids the auxiliary hook guide pulley in the descending process, and the main hook guide pulley is pulled to swing towards one side close to the auxiliary hook guide pulley; the main hook guide pulley can accurately descend to the position of the auxiliary hook guide pulley on the guide pulley yoke to realize installation; and finally, the auxiliary hook guide pulley is pulled to swing towards the side far away from the main hook guide pulley, so that the auxiliary hook guide pulley can accurately fall to the position, where the main hook guide pulley is located, of the guide pulley yoke to be installed, and therefore the main hook guide pulley and the auxiliary hook guide pulley are exchanged.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a method for replacing a tripod guide pulley by utilizing a supporting assembly. Background Art

[0002] In a traditional crane winch, when the winch is in motion, after the brake is released, during the process of the hook connected to the wire rope rising or falling, the brake may not be fully opened due to insufficient pressure in the brake hydraulic oil circuit, resulting in the winch brake shaking. This is prone to the risk of the winch brake braking again due to insufficient pressure in the brake hydraulic oil circuit. If the brake suddenly brakes during the rising process of the hook, it may cause the cargo to be unhooked, which may damage the cargo at the least, or even cause casualties on the work site. This will greatly increase the risk and cost of lifting. In order to solve this technical problem, such as China Application No. 2020113123 42.9, a patent document with a publication date of 2021.01.22, discloses a large-scale pile-wrapped full-revolving crane, including a crane, which is provided with a rope winding mechanism, a drum hydraulic brake and a boom shelf, the rope winding mechanism is sequentially passed through the rotating platform, the tripod, the boom part and the hook, the boom shelf is provided on the deck shelf, and the drum hydraulic brake is fixedly installed on one side of the winch fixed frame; the drum hydraulic brake includes a piston hydraulic cylinder, a brake part, a swing part, a manual adjustment part and a connecting part; the manual adjustment part includes a slide rod and a handle; the boom shelf includes a frame, a roller, a roller connecting part and a side baffle.

[0003] In the crane of the above document, the main hook and the auxiliary hook on the boom are connected with the wire rope passing around the main hook guide pulley and the auxiliary hook guide pulley located in the middle of the tripod during operation, and the positions of the main hook guide pulley and the auxiliary hook guide pulley are matched with the main hook and the auxiliary hook on the boom. If the positions of the main hook guide pulley and the auxiliary hook guide pulley on the same side of the tripod are installed incorrectly, the guide pulley needs to be replaced. Since the guide pulley is heavy, if it needs to be replaced, it needs to be replaced by lifting the guide pulley with a crane. However, the operation of lifting the pulley with a crane is relatively complicated, and it needs to be lifted at a long distance. It needs to be determined repeatedly many times before the lifting position can be determined, which makes the lifting process relatively complicated and the direction cannot be determined more accurately. Summary of the invention

[0004] The purpose of the present invention is to provide a method for replacing the guide pulleys of a tripod using a support assembly, which can replace the positions of the main hook guide pulley and the auxiliary hook guide pulley at a close distance through the support assembly, has a simple operation method, low use cost and high accuracy.

[0005] To achieve the above object, a method for replacing a tripod guide pulley using a support assembly comprises the following steps: S1 welds the support assembly on the tripod so that the support assembly is located above the guide pulley frame, and builds an extension platform on the side close to the guide pulley frame; S2 installs the pulling member on the supporting assembly so that the pulling member is located above the guide pulley frame, and then inserts the sling into the rope groove of the auxiliary hook guide pulley, and then tightens the sling and connects it to the pulling member; S3 pulls up the main hook guide pulley through the pulling member so that the pulling force of the pulling member is equal to the weight of the main hook guide pulley, then removes the main hook guide pulley from the guide pulley frame, and then pulls up the main hook guide pulley through the pulling member to separate from the guide pulley frame to a predetermined height and then stops; S4: Slip a sling into the rope groove of the main hook guide pulley, so that the sling is connected to the pulling member after being tightened, pull up the auxiliary hook guide pulley through the pulling member, then disassemble the auxiliary hook guide pulley, separate the auxiliary hook guide pulley from the guide pulley frame, pull the auxiliary hook guide pulley to swing to the side away from the main hook guide pulley, and the swing angle is greater than the angle at which the main hook guide pulley swings to the position of the auxiliary hook guide pulley on the guide pulley frame, then drive the main hook guide pulley to descend through the pulling member, and at the same time pull the main hook guide pulley to swing to the side close to the auxiliary hook guide pulley, so that the main hook guide pulley descends to the position of the auxiliary hook guide pulley on the guide pulley frame, and installs the main hook guide pulley; S5 After the main hook guide pulley is installed, the auxiliary hook guide pulley is driven down by the pulling member, and the auxiliary hook guide pulley is installed at the position of the guide pulley frame, and the auxiliary hook guide pulley is installed to complete the replacement of the main and auxiliary hook guide pulleys.

[0006] The above arrangement is that a supporting assembly is installed above the guide pulley frame, and then a pulling member is arranged on the supporting assembly. The supporting assembly can be arranged close to the guide pulley frame, so that there is no need to set up an additional crane to achieve pulling, and the operation method is simple. The guide pulley is pulled by the pulling member, and the pulling force of the pulling member is equal to the gravity of the guide pulley, so that the pulling member pulls the guide pulley up, which is convenient for disassembling the guide pulley, and then the guide pulley is lifted to a predetermined height, so that the guide pulley is separated from the guide pulley frame, and the auxiliary hook guide pulley is pulled to deviate by a certain angle to the side away from the main hook guide pulley, so that the main hook guide pulley can avoid the auxiliary hook guide pulley during the descent process, so that it is not affected by the auxiliary hook guide pulley, so that the main hook guide pulley can be accurately descended to the position of the auxiliary hook guide pulley on the guide pulley frame for installation; and the auxiliary hook guide pulley is pulled to swing to the side away from the main hook guide pulley, so that the auxiliary hook guide pulley can be accurately dropped to the position of the main hook guide pulley on the guide pulley frame for installation, thereby completing the replacement of the main and auxiliary hook guide pulleys with high accuracy.

[0007] Furthermore, after "driving the auxiliary hook guide pulley to descend by the pulling member" in step S5, it also includes: pulling the auxiliary hook guide pulley to swing to the side away from the main hook guide pulley, so that the auxiliary hook guide pulley descends to the position of the main hook guide pulley on the guide pulley frame.

[0008] The above arrangement enables the auxiliary hook guide pulley to be reliably installed by pulling the auxiliary hook guide pulley to swing to the position of the main hook guide pulley on the guide pulley frame.

[0009] Furthermore, the support assembly in step S1 includes support member 1 and support member 2, support member 2 is arranged below support member 1, one end of support member 1 is fixedly welded to the tripod, the other end of support member 1 is extended outward along the horizontal direction, one end of support member 2 is welded to the tripod, the other end of support member 2 is fixedly connected to the other end of support member 1, and an angle is formed between support member 1 and support member 2, and the angle range of the angle is 45°~60°.

[0010] The above arrangement can improve the bearing capacity of support member one by supporting the support member two together.

[0011] Furthermore, in step S2, two pulling members are provided and both are arranged on the first supporting member.

[0012] The above arrangement facilitates the pulling member to pull the guide pulley in the vertical direction.

[0013] Furthermore, the step S2 also includes: The pulling member arranged on the extension platform is connected with the pulling member arranged on the first supporting member.

[0014] According to the above arrangement, while the main hook guide pulley is driven to descend by the pulling member arranged on the support member, the main hook guide pulley can be pulled to deviate from a certain angle by the pulling member arranged on the extension platform, so that the main hook guide pulley can be accurately dropped to the position of the auxiliary hook guide pulley on the guide pulley frame.

[0015] Furthermore, the step S4 also includes: The auxiliary hook guide pulley is pulled in a plane parallel to the guide pulley pin by a pulling member arranged on one side of the extension platform to swing to a side away from the main hook guide pulley; The main hook guide pulley is pulled to swing toward a side close to the auxiliary hook guide pulley in a plane parallel to the pin shaft of the guide pulley by a pulling member arranged on one side of the extension platform.

[0016] The above arrangement enables the main hook guide pulley to avoid the auxiliary hook guide pulley during the descent process, so as not to be affected by the auxiliary hook guide pulley, so that the main hook guide pulley can be accurately descended to the position of the auxiliary hook guide pulley on the guide pulley frame for installation.

[0017] Furthermore, the step S5 also includes: By pulling the auxiliary hook guide pulley in a plane parallel to the guide pulley pin axis through a pulling member arranged on the other side of the extension platform, the auxiliary hook guide pulley is pulled to swing toward the side away from the main hook guide pulley, and the angle at which the auxiliary hook guide pulley swings to the position of the main hook guide pulley at the guide pulley frame is equal to the angle at which the main hook guide pulley swings to the position of the auxiliary hook guide pulley at the guide pulley frame.

[0018] The above arrangement can realize precise position control by pulling the auxiliary hook guide pulley to swing to one side through the pulling member, and can make the auxiliary hook guide pulley drop to the position of the main hook guide pulley on the guide pulley frame for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the present invention.

[0020] Figure 2 It is a schematic diagram of the connection between the pulling member and the sling of the present invention.

[0021] Figure 3 It is a schematic diagram of the pulley after replacement of the present invention.

[0022] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure 5 It is a schematic diagram of the pulley swing in the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 5 As shown, a method for replacing a tripod guide pulley using a support assembly includes the following specific steps: S1 welds a support assembly on the tripod 3, the support assembly includes a support member 1 and a support member 2 2, the support member 2 2 is arranged below the support member 1, one end of the support member 1 is fixedly welded to the tripod 3, the other end of the support member 1 is extended outwardly along the horizontal direction, and then one end of the support member 2 2 is welded to the tripod 3, the other end of the support member 2 2 is fixedly connected to the other end of the support member 1, so that an angle a is formed between the support member 1 and the support member 2 2, and the angle range of the angle is 45°~60°. In the present embodiment, the angle a is 50°, so that the support assembly after welding is located above the guide pulley frame, and an extension platform 4 is built on the side close to the guide pulley frame.

[0026] S2 installs the pulling member 5 on the support member 1 so that the pulling member 5 is located above the guide pulley frame, and then puts the sling 7 into the rope groove of the main hook guide pulley 6, so that the sling 7 is connected to the pulling member 5 after being tightened, and at the same time, the pulling member arranged on one side of the extension platform 4 is connected to the connection between the pulling member 5 installed on the support member 1 and the sling 7. In this embodiment, the pulling member 5 is a hand winch.

[0027] S3 pulls up the main hook guide pulley 6 through the pulling member 5 installed on the support member 1, so that the pulling force of the pulling member 5 is equal to the gravity of the main hook guide pulley 6, and then removes the stop plate and the pin shaft of the main hook guide pulley 6, and then pulls up the main hook guide pulley 6 through the pulling member 5 to separate it from the guide pulley frame and stop at a predetermined height. The preset height can be less than the height that the operator can operate.

[0028] S4 repeats steps S2-S3, and separates the auxiliary hook guide pulley 8 from the guide pulley frame and stops at a preset height. In this embodiment, the height to which the main hook guide pulley 6 is pulled up is greater than the height to which the auxiliary hook guide pulley 8 is pulled up. The auxiliary hook guide pulley 8 is pulled to a side away from the main hook guide pulley 6 in a plane parallel to the guide pulley pin by a pulling member arranged on one side of the extension platform 4, and the swing angle b is greater than the angle c of the main hook guide pulley 6 swinging to the auxiliary hook guide pulley 8 at the guide pulley frame position, and then the auxiliary hook guide pulley 8 is pulled up by a pulling member arranged on one side of the extension platform 4. The pulling member 5 on the support member 1 drives the main hook guide pulley 6 to descend, and at the same time, the main hook guide pulley 6 is pulled to swing toward the side close to the auxiliary hook guide pulley 8 in a plane parallel to the guide pulley pin by a pulling tool arranged on one side of the extension platform 4. The pulling tool can be a rope or other pulling tool sleeved on the guide pulley, so that the main hook guide pulley 6 is dropped to the position of the auxiliary hook guide pulley 8 on the guide pulley frame, and the main hook guide pulley 6 is installed, specifically, the stop plate and pin of the main hook guide pulley 6 are reinstalled.

[0029] S5 After the main hook guide pulley 6 is installed, the auxiliary hook guide pulley 8 is driven to descend to the position before swinging through the pulling member 5 installed on the support member 1, and at the same time, the auxiliary hook guide pulley 8 is pulled to the side away from the main hook guide pulley 6 in a plane parallel to the guide pulley pin shaft through the pulling member arranged on the other side of the extension platform 4, so that the angle b of the auxiliary hook guide pulley 8 when the main hook guide pulley 6 is swung to the position of the guide pulley frame is equal to the angle c of the main hook guide pulley 6 when the auxiliary hook guide pulley 8 is swung to the position of the guide pulley frame, so that the auxiliary hook guide pulley 8 is dropped to the position of the main hook guide pulley 6 on the guide pulley frame, and the auxiliary hook guide pulley 8 is installed, specifically, the stop plate and pin shaft of the auxiliary hook guide pulley 8 are reinstalled, and finally the replacement of the main and auxiliary hook guide pulleys is completed.

[0030] The working principle of the present invention is as follows: the guide pulley is pulled by the pulling member 5 arranged on the supporting assembly, and the pulling force of the pulling member 5 is equal to the gravity of the guide pulley, and then the guide pulley is disassembled, and the main and auxiliary hook guide pulleys 6 are respectively hoisted to a predetermined height, so that the main and auxiliary hook guide pulleys 6 are separated from the guide pulley frame, and then the auxiliary hook guide pulley 8 is pulled to deviate from the main hook guide pulley 6 by a certain angle, so that the main hook guide pulley 6 avoids the auxiliary hook guide pulley during the descent process, and by pulling the main hook guide pulley 6 to swing toward the side close to the auxiliary hook guide pulley 8, the main hook guide pulley 6 can be accurately descended to the position of the auxiliary hook guide pulley 8 on the guide pulley frame for installation; finally, the auxiliary hook guide pulley 8 is pulled to swing toward the side away from the main hook guide pulley 6, so that the auxiliary hook guide pulley can be accurately dropped to the position of the main hook guide pulley 6 on the guide pulley frame for installation, thereby completing the replacement of the main and auxiliary hook guide pulleys.

Claims

1. A method for replacing a guide pulley of a tripod using a support assembly, characterized in that: The following steps are involved: S1 welds the support assembly on the tripod so that the support assembly is located above the guide pulley frame, and builds an extension platform on the side close to the guide pulley frame; S2 installs the pulling member on the supporting assembly so that the pulling member is located above the guide pulley frame, and then inserts the sling into the rope groove of the auxiliary hook guide pulley, and then connects the sling to the pulling member after the sling is tightened; S3 pulls up the main hook guide pulley through the pulling member so that the pulling force of the pulling member is equal to the weight of the main hook guide pulley, then removes the main hook guide pulley from the guide pulley frame, and then pulls up the main hook guide pulley through the pulling member to separate from the guide pulley frame to a predetermined height and then stops; S4: Slip a sling into the rope groove of the main hook guide pulley, so that the sling is connected to the pulling member after being tightened, pull up the auxiliary hook guide pulley through the pulling member, then disassemble the auxiliary hook guide pulley, separate the auxiliary hook guide pulley from the guide pulley frame, pull the auxiliary hook guide pulley to swing to the side away from the main hook guide pulley, and the swing angle is greater than the angle at which the main hook guide pulley swings to the position of the auxiliary hook guide pulley on the guide pulley frame, then drive the main hook guide pulley to descend through the pulling member, and at the same time pull the main hook guide pulley to swing to the side close to the auxiliary hook guide pulley, so that the main hook guide pulley descends to the position of the auxiliary hook guide pulley on the guide pulley frame, and installs the main hook guide pulley; S5 After the main hook guide pulley is installed, the auxiliary hook guide pulley is driven down by the pulling member, and the auxiliary hook guide pulley is installed at the position of the guide pulley frame, and the auxiliary hook guide pulley is installed to complete the replacement of the main and auxiliary hook guide pulleys.

2. A method for replacing a tripod guide pulley using a support assembly according to claim 1, characterized in that: After "driving the auxiliary hook guide pulley to descend by the pulling member" in step S5, the step further includes: pulling the auxiliary hook guide pulley to swing to the side away from the main hook guide pulley, so that the auxiliary hook guide pulley descends to the position of the main hook guide pulley on the guide pulley frame.

3. The method for replacing the guide pulley of a tripod using a support assembly according to claim 1, characterized in that: The support assembly in step S1 includes support member 1 and support member 2, support member 2 is arranged below support member 1, one end of support member 1 is fixedly welded to the tripod, the other end of support member 1 is extended outward along the horizontal direction, one end of support member 2 is welded to the tripod, the other end of support member 2 is fixedly connected to the other end of support member 1, and an angle is formed between support member 1 and support member 2, and the angle range of the angle is 45°~60°.

4. The method for replacing a guide pulley of a tripod using a support assembly according to claim 1, characterized in that: In step S2, two pulling members are provided and both are arranged on the first supporting member.

5. The method for replacing the guide pulley of a tripod using a support assembly according to claim 1, characterized in that: The pulling member arranged on the extension platform is connected with the pulling member arranged on the first supporting member.

6. The method for replacing the guide pulley of a tripod using a support assembly according to claim 1, characterized in that: The step S4 also includes: The auxiliary hook guide pulley is pulled in a plane parallel to the guide pulley pin by a pulling member arranged on one side of the extension platform to swing to a side away from the main hook guide pulley; The main hook guide pulley is pulled to swing toward a side close to the auxiliary hook guide pulley in a plane parallel to the pin shaft of the guide pulley by a pulling member arranged on one side of the extension platform.

7. The method for replacing the guide pulley of a tripod using a support assembly according to claim 2, characterized in that: The step S5 also includes: By pulling the auxiliary hook guide pulley in a plane parallel to the guide pulley pin axis through a pulling member arranged on the other side of the extension platform, the auxiliary hook guide pulley is pulled to swing toward the side away from the main hook guide pulley, and the angle at which the auxiliary hook guide pulley swings to the position of the main hook guide pulley at the guide pulley frame is equal to the angle at which the main hook guide pulley swings to the position of the auxiliary hook guide pulley at the guide pulley frame.

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