A vertical jib

Abstract

The utility model discloses a vertical boom, including flange cover and section, the outer surface one side of flange cover is equipped with flange body, and flange body fixed sleeve is connected in the outer surface of section, the outer surface one side of flange body is fixedly connected with support plate, the outer surface one side of support plate is fixedly connected with steel pipe, the top and bottom of steel pipe all are fixedly connected with bearing assembly, and two bearing assemblies are rotatably connected with the swing arm of common. The top of swing arm is equipped with the jib that penetrates to the bottom. In the utility model, through adopting the swing arm support structure of symmetrical arrangement of double bearing assembly, effectively solved the radial wobble problem of traditional boom because of single point support. Specifically, the rigid support system of sealing bearing and bearing seat that is symmetrically arranged up and down forms, makes swing arm always keep stable axial motion track in the rotation process, eliminates the phenomenon of deflection because of uneven force.

Description

Technical Field

[0001] This utility model relates to the field of manhole technology, and in particular to a vertical boom. Background Technology

[0002] Vertical lifting manholes are installed on the lower part of the tank walls in petrochemical, pharmaceutical, and food industries. They serve as the entrance and exit for workers during tank construction, cleaning, and emptying. The strength and sealing of the manhole are key technical aspects. Vertical lifting manholes are mainly installed on the side walls of tanks for worker access.

[0003] Traditional crane booms often use a single bearing or hinge structure to support the boom. When opening and closing the flange cover, the unbalanced force can easily cause radial swaying, resulting in deviation of the lifting trajectory, affecting the alignment accuracy of the flange cover and the flange, and even damaging the sealing surface. Utility Model Content

[0004] This utility model is a vertical boom proposed to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vertical boom, including a flange cover and a cylindrical section, wherein a flange body is provided on one side of the outer surface of the flange cover, and the flange body is fixedly sleeved on the outer surface of the cylindrical section; a support plate is fixedly connected to one side of the outer surface of the flange body; a steel pipe is fixedly connected to one side of the outer surface of the support plate; bearing assemblies are fixedly connected to the top and bottom of the steel pipe; and the two bearing assemblies are rotatably connected to a swing arm.

[0006] The top of the swing arm is provided with a suspension rod that extends to the bottom. A bearing is installed between the suspension rod and the swing arm, and a nut assembly is threadedly connected above the bearing.

[0007] A connecting assembly is fixedly connected to the bottom of the boom, and a lifting lug is rotatably connected to the bottom of the connecting assembly, with a flange cover fixedly installed at the bottom of the lifting lug.

[0008] Furthermore, a first gasket is provided between the flange body and the flange cover. This design can effectively absorb minor unevenness on the flange connection surface, enhance sealing, prevent media leakage, and reduce direct friction between the flange cover and the flange body, thus extending service life.

[0009] Furthermore, both bearing assemblies include bearing housings, which are fixedly connected to the steel pipe. A sealed bearing is fixedly installed inside the bearing housing, and the inner ring of the sealed bearing is fixedly connected to the rotating arm. A cover plate is fixedly connected to the end of each bearing housing away from the steel pipe. The combination of the bearing housing and the sealed bearing improves the rotational stability of the rotating arm and reduces radial runout.

[0010] Furthermore, the swing arm is fixedly connected with stiffening plates, which enhance the structural strength of the swing arm and improve its overall load-bearing capacity and safety.

[0011] Furthermore, the nut assembly includes a nut body, which is threaded onto the outer surface of the boom. A second washer fitted onto the outer surface of the boom is located below the nut body. The nut assembly can adjust the axial position of the boom to ensure accurate alignment between the lifting lug and the flange cover.

[0012] Furthermore, the connecting assembly includes a connector, which is rotatably connected to the lifting lug. Each connector has a connecting nut rotatably connected to its top, and the connecting nut is threaded onto the bottom of the lifting rod. The connecting nut facilitates quick assembly and disassembly, improving maintenance convenience.

[0013] Furthermore, two handles are symmetrically fixedly connected to one side of the outer surface of the flange cover. The handles are designed to facilitate manual operation of the flange cover opening and closing, improving work efficiency, while the symmetrical arrangement ensures uniform force application.

[0014] The beneficial effects of this utility model are:

[0015] In use, this utility model presents a vertical boom that effectively solves the radial sway problem caused by single-point support in traditional booms by employing a symmetrically arranged double-bearing assembly for its boom support structure. Specifically, the symmetrically arranged sealed bearings and bearing seats form a rigid support system, ensuring that the boom maintains a stable axial movement trajectory during rotation and eliminating swaying caused by uneven force. The locking structure of the bearing and nut assembly between the boom and the boom ensures both the circumferential freedom of the lifting lugs and provides axial positioning constraints. This design ensures that the flange cover moves accurately along the set direction during opening and closing, reducing flange alignment errors between the flange cover and the cylinder section and completely avoiding damage to the sealing surface caused by misalignment friction. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 : Front view of this utility model;

[0018] Figure 2 The present utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 Partial top sectional view of this utility model;

[0020] Figure 4 : A cross-sectional view of the steel pipe of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Steel pipe; 2. Flange cover; 3. Rib plate; 4. Swing arm; 5. Lifting rod; 6. Nut body; 7. Second gasket; 8. Bearing; 9. Connecting nut; 10. Connecting piece; 11. Lifting lug; 12. Cylindrical section; 13. Flange body; 14. First gasket; 15. Handle; 16. Cover plate; 17. Bearing seat; 18. Support plate; 19. Sealed bearing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 4 As shown, a vertical boom includes a flange cover 2 and a cylindrical section 12. A flange body 13 is provided on one side of the outer surface of the flange cover 2, and the flange body 13 is fixedly fitted onto the outer surface of the cylindrical section 12. A first gasket 14 abuts against the flange body 13 and the flange cover 2. The flange body 13 is fixed to the outer surface of the cylindrical section 12 by welding. The welding structure is simple, strong, and durable, while also ensuring the sealing of the connection. In actual installation, bolts and nuts are used to fix the flange body 13 to the flange cover 2.

[0025] A support plate 18 is fixedly connected to one side of the outer surface of the flange body 13. A steel pipe 1 is fixedly connected to one side of the outer surface of the support plate 18. Bearing assemblies are fixedly connected to the top and bottom of the steel pipe 1. Two bearing assemblies are rotatably connected to a rotating arm 4. Both bearing assemblies include a bearing seat 17, and the bearing seat 17 is fixedly connected to the steel pipe 1. A sealed bearing 19 is fixedly installed inside the bearing seat 17, and the inner ring of the sealed bearing 19 is fixedly connected to the rotating arm 4. A cover plate 16 is fixedly connected to the end of each of the two bearing seats 17 away from the steel pipe 1. The sealed bearing 19 is composed of a ball bearing and a packing. The use of packing can prevent grease leakage.

[0026] The rotating arm 4 is fixedly connected to a stiffening plate 3. The top of the rotating arm 4 is provided with a hanging rod 5 that extends through to the bottom. A bearing 8 is installed between the hanging rod 5 and the rotating arm 4. A nut assembly is threadedly connected above the bearing 8. The nut assembly includes a nut body 6, and the nut body 6 is threadedly sleeved on the outer surface of the hanging rod 5. A second washer 7 is sleeved on the outer surface of the hanging rod 5 and abuts against the bottom of the nut body 6.

[0027] The bottom of the boom 5 is fixedly connected to a connecting assembly, the bottom of the connecting assembly is rotatably connected to a lifting lug 11, and the flange cover 2 is fixedly installed at the bottom of the lifting lug 11. The connecting assembly includes a connector 10, and the connector 10 is rotatably connected to the lifting lug 11. The top of the connector 10 is rotatably connected to a connecting nut 9, and the connecting nut 9 is threaded onto the bottom of the boom 5.

[0028] Two handles 15 are symmetrically fixed to one side of the outer surface of the flange cover 2. The handles 15 are fixed to the flange cover 2 by welding, which facilitates manual opening and closing of the flange cover 2.

[0029] Working principle: The rotating arm 4 forms a stable rotational support structure with the steel pipe 1 through two sets of bearing assemblies (bearing housing 17 + sealed bearing 19).

[0030] When the operator applies external force, the boom 4 can rotate smoothly around the axis of the steel pipe 1, driving the boom 5 and the lug 11 to move, thereby controlling the opening or closing of the flange cover 2.

[0031] The boom 5 passes through the swing arm 4 and rotates relative to the bearing 8, so that the boom 5 can rotate with the swing arm 4 while maintaining freedom in the vertical direction.

[0032] The nut assembly (nut body 6 + second washer 7) can adjust the axial position of the lifting rod 5 to ensure that the flange cover 2 and the flange body 13 are precisely aligned and to avoid damage to the sealing surface.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vertical jib comprising a flange cover (2) and a barrel section (12), characterized in that: The flange cover (2) has a flange body (13) on one side of its outer surface, and the flange body (13) is fixedly sleeved on the outer surface of the cylindrical section (12). A support plate (18) is fixedly connected to one side of the outer surface of the flange body (13), and a steel pipe (1) is fixedly connected to one side of the outer surface of the support plate (18). Bearing assemblies are fixedly connected to the top and bottom of the steel pipe (1), and the two bearing assemblies are rotatably connected to a rotating arm (4). The top of the rotating arm (4) is provided with a rod (5) that extends to the bottom. A bearing (8) is installed between the rod (5) and the rotating arm (4). A nut assembly is threadedly connected above the bearing (8). The bottom of the boom (5) is fixedly connected to a connecting assembly, and the bottom of the connecting assembly is rotatably connected to a lifting lug (11), and the flange cover (2) is fixedly installed at the bottom of the lifting lug (11).

2. A vertical jib according to claim 1, wherein: The flange body (13) and the flange cover (2) are in contact with a first gasket (14).

3. A vertical jib as claimed in claim 1, wherein: Both bearing assemblies include a bearing housing (17), and the bearing housing (17) is fixedly connected to the steel pipe (1). A sealed bearing (19) is fixedly installed inside the bearing housing (17), and the inner ring of the sealed bearing (19) is fixedly connected to the rotating arm (4). A cover plate (16) is fixedly connected to the end of each of the two bearing housings (17) away from the steel pipe (1).

4. A vertical jib according to claim 1, wherein: The rotating arm (4) is fixedly connected to the stiffening plate (3).

5. A vertical jib as defined in claim 1, wherein: The nut assembly includes a nut body (6), which is threaded onto the outer surface of the boom (5), and a second washer (7) is fitted onto the outer surface of the boom (5) below the nut body (6).

6. A vertical jib according to claim 1, wherein: The connecting assembly includes a connector (10), and the connector (10) is rotatably connected to the lug (11). The top of the connector (10) is rotatably connected to a connecting nut (9), and the connecting nut (9) is threaded onto the bottom of the rod (5).

7. A vertical jib as defined in claim 1, wherein: Two handles (15) are symmetrically fixedly connected to one side of the outer surface of the flange cover (2).

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