Standard knot device of round rectangular tenon and tower crane

Abstract

The utility model discloses a standard knot device with a circular rectangular tenon and a tower crane, the standard knot device comprises a main chord member, the main chord member is a hollow pipe, one end of the main chord member is provided with a male joint, and the male joint is radially provided with two first bolt holes in a penetrating manner; the female joint is arranged at the other end of the main chord member, is a hollow pipe and is provided with a second pin shaft hole penetrating in the radial direction; the female connector of one standard knot device can be arranged on the male connector of another adjacent standard knot device in a sleeving mode, and the second pin shaft hole in the female connector can be aligned with the first pin shaft hole in the male connector. And the connecting pin shaft is arranged in the first pin shaft hole and the second pin shaft hole in a penetrating manner so as to connect the two adjacent standard knot devices. The standard knot connecting structure can effectively reduce the aerodynamic coefficient of the tower crane, and has the technical effects of convenience in connection, uniform stress distribution at the joint and high connecting strength.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a standard section device of a round rectangular tenon and a tower crane. Background Art

[0002] Tower cranes are lifting and hoisting equipment commonly used in construction engineering operations. The main tower body of a tower crane is assembled from bottom to top by stacking several standard sections.

[0003] The existing tower crane standard section main chord mainly adopts square tube or angle steel. Both forms of standard section main chord have the disadvantages of large aerodynamic coefficient and large wind load. At the same time, the upper and lower standard sections are connected by high-strength bolts, and the connecting sleeves are welded at the upper and lower ends of the four main chords. The upper and lower standard sections are connected together through the high-strength bolt connecting sleeves. However, the disadvantage of this method is that the high-strength bolts are easy to loosen. Each connecting bolt must be regularly tightened during the use of the tower crane, which is labor-intensive and time-consuming. Utility Model Content

[0004] In view of the above technical problems, the utility model proposes a standard section of a tower crane with a circular tube as the main chord. The tenon of the main chord adopts a combined circular and rectangular cross-section. This standard section connection structure can effectively reduce the aerodynamic coefficient of the tower crane, and has the technical effects of convenient connection, uniform stress distribution at the connection, and high connection strength.

[0005] A standard joint device for a round rectangular tenon, comprising:

[0006] The main chord rod is a hollow tube and is provided with a male joint at one end, and two first pin shaft holes are radially provided on the male joint;

[0007] A female joint, arranged at the other end of the main chord, is a hollow tube and has a second pin hole extending radially therethrough; the female joint of a standard joint device can be sleeved on the male joint of another adjacent standard joint device, and the second pin hole on the female joint can be aligned with the first pin hole on the male joint;

[0008] A connecting pin is inserted into the first pin hole and the second pin hole to connect two adjacent standard joint devices;

[0009] The main chord has a hollow inner cavity with a circular cross section, a reinforcing plate is symmetrically arranged on the inner side of the hollow inner cavity, and a pin hole coaxial with the second pin hole is opened on the reinforcing plate;

[0010] The portion of the male joint where the first pin shaft hole is provided is a solid tenon, and the tenon portion of the male joint is processed with two symmetrical planes on the basis of a circular cross section to form a circular rectangular cross section;

[0011] The symmetry plane on the male connector fits with the reinforcement plate inside the hollow inner cavity of the female connector.

[0012] The reinforcing plate is provided with a chamfer at one side of the bottom of the main chord rod to facilitate the docking of the male joint and the female joint.

[0013] The main chord is a hollow circular tube, and the cross section of the male joint is a circular rectangle.

[0014] The male connector is welded to one end of the main chord, and a transition fillet is provided at the connection between the male connector and the main chord.

[0015] A pin bracket is arranged on one side of the female joint, and the bottom of the pin bracket is welded to the horizontal web of the standard section device.

[0016] The utility model further discloses a tower crane, which comprises the standard section device of the round rectangular tenon. Beneficial Effects

[0017] Compared with the existing standard section devices, the standard section device with round rectangular tenon and the tower crane of the utility model have the following advantages:

[0018] 1. The standard section of tower crane with round tube as main chord can effectively reduce the aerodynamic coefficient of tower crane and improve its typhoon resistance.

[0019] 2. Two adjacent standard sections can be butt-jointed by male and female joints, and fixed by pins passing through the pin holes of the male and female joints. Bolts are no longer used to connect adjacent standard sections, avoiding the need to regularly check whether the tower body connection bolts are loose during the use of the tower crane.

[0020] 3. The tenon of the male joint adopts a circular rectangular cross-section, which can make the stress distribution at the opening of the first pin shaft hole more uniform and improve the structural strength of the male joint.

[0021] 4. A reinforcing plate is set on the inner side of the female joint to improve the structural strength of the female joint, while increasing the contact area between the pin and the female joint, effectively improving the stress distribution at the female joint orifice. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a standard section of the utility model;

[0023] Among them, 1. main chord; 2. male joint; 3. female joint; 4. connecting pin; 5. horizontal web; 6. diagonal web; 11. pin bracket;

[0024] Figure 2 This is a schematic diagram of the main chord structure;

[0025] Among them, 7. hollow circular tube;

[0026] Figure 3 This is the main view of the male connector;

[0027] Among them, 8, the first pin hole;

[0028] Figure 4 for Figure 3 Side view;

[0029] Figure 5 for Figure 3 Top view;

[0030] Figure 6 It is a cross-sectional view of the female connector;

[0031] Among them, 9, the second pin hole;

[0032] Figure 7 It is a top view of the female connector;

[0033] Among them, 10. Strengthen the board;

[0034] Figure 8 It is a structural schematic diagram of the pin bracket of the utility model. DETAILED DESCRIPTION

[0035] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification. Example

[0036] like Figure 1 As shown, the utility model is a standard joint device of a circular rectangular tenon, comprising a main chord 1, a male joint 2, a female joint 3, a connecting pin 4, a horizontal web 5, and an oblique web 6.

[0037] The main chord 1 is set as a hollow circular tube 7;

[0038] The male connector 2 is arranged at the upper end of the main chord 1 , and a first pin hole 8 which penetrates radially is formed on the male connector 2 .

[0039] The female joint 3 is arranged at the lower end of the main chord 1. The female joint 3 is a hollow circular tube and has a second pin hole 9 radially penetrating therethrough. The connecting pin 4 can be inserted into the first pin hole 8 and the second pin hole 9 to connect two adjacent standard section devices.

[0040] A reinforcing plate 10 is arranged inside the circular tube of the female connector 3 to strengthen the structural strength of the female connector 3. A pin hole coaxial with the second pin hole 9 is opened on the reinforcing plate 10 to ensure that the pin 4 can pass through the female connector 3; the reinforcing plate 10 is arranged inside the female connector 3 to improve the structural strength of the female connector 3, and at the same time increase the contact surface area between the pin 4 and the female connector 3, effectively improving the stress distribution at the orifice of the female connector 3.

[0041] The portion of the male connector 2 where the first pin hole 8 is opened is a solid tenon, and its cross section is a circular rectangle. The curved outer diameter of the circular rectangular tenon of the male connector 2 should be set to be smaller than the inner diameter of the female connector 3, which can ensure that the male connector 2 can smoothly penetrate into the female connector 3. The tenon portion of the male connector 2 is processed with two symmetrical planes on the basis of a circular cross section to form a circular rectangular cross section, which can make the stress distribution at the opening of the first pin hole 8 more uniform and improve the structural strength of the male connector 2. The male connector tenon adopts a circular rectangular cross section, which can make the stress distribution at the opening of the first pin hole more uniform and improve the structural strength of the male connector.

[0042] A reinforcing plate is arranged on the inner side of the female joint to improve the structural strength of the female joint, while increasing the contact area between the pin shaft and the female joint, effectively improving the stress distribution at the female joint orifice.

[0043] The male connector is welded to one end of the main chord, and a transition fillet is provided at the connection between the male connector and the main chord. Example

[0044] As a further optimization of Example 1 of the utility model, the difference between Example 2 and Example 1 is that a chamfer is provided on one side of the bottom of the main chord in the reinforcing plate 10 to facilitate the docking of the male joint 2 and the female joint 3, thereby improving the installation efficiency of the standard section. Example

[0045] The difference between this embodiment and the embodiments 1 and 2 is that a pin bracket 11 is provided on one side of the female joint 3, and the bottom of the pin bracket 11 is welded to the horizontal web 5 of the standard joint device. The pin 4 has a large mass, and when the pin 4 is inserted into the first pin hole 8 of the female joint 3 and the second pin hole 9 of the male joint 2, the pin 4 can be placed on the pin bracket 11 for knocking, which is convenient for personnel to operate and reduces the labor intensity when inserting the pin.

[0046] The utility model also provides a tower crane, wherein the tower crane comprises the standard section device according to the round rectangular tenon described above.

[0047] When the above-mentioned standard joint device is used, a male joint 2 is provided at the first end of the main chord 1 body of the standard joint device, and a female joint 3 is provided at the second end. Since the female joint 3 is arranged to be hollow, the female joint of one standard joint device can be sleeved on the male joint 2 of another adjacent standard joint device, and a second pin shaft hole 9 is radially penetrated on the female joint 3, which can be aligned with the first pin shaft hole 8 radially penetrating on the male joint, so that the pin shaft 4 can be penetrated by the first pin shaft hole 8 and the second pin shaft hole 9 to connect two adjacent standard joint devices.

Claims

1. A standard joint device for a round rectangular tenon, characterized in that: include: The main chord rod (1) is a hollow tube and is provided with a male joint (2) at one end, and two first pin holes (8) are radially penetrated through the male joint (2); A female joint (3) is arranged at the other end of the main chord (1), is a hollow tube and has a second pin hole (9) extending radially therethrough; the female joint (3) of a standard joint device can be sleeved on a male joint (2) of another standard joint device arranged adjacently, and the second pin hole (9) on the female joint (3) can be aligned with the first pin hole (8) on the male joint (2); A connecting pin (4) is inserted into the first pin hole (8) and the second pin hole (9) to connect two adjacent standard joint devices; The main chord (1) has a hollow inner cavity with a circular cross section, a reinforcing plate (10) is symmetrically arranged on the inner side of the hollow inner cavity, and a pin hole coaxial with the second pin hole (9) is opened on the reinforcing plate (10); The portion of the male joint (2) in which the first pin shaft hole (8) is provided is a solid tenon, and the tenon portion of the male joint (2) is processed with two symmetrical planes on the basis of a circular cross section to form a circular rectangular cross section; The symmetry plane on the male connector (2) fits with the reinforcing plate (10) inside the hollow inner cavity of the female connector (3).

2. The standard joint device of the round rectangular tenon according to claim 1, characterized in that: The reinforcing plate (10) is provided with a chamfer at one side of the bottom of the main chord to facilitate the docking of the male joint (2) and the female joint (3).

3. The standard joint device of the round rectangular tenon according to claim 1, characterized in that: The main chord (1) is a hollow circular tube, and the cross section of the male joint (2) is a circular rectangle.

4. The standard joint device of the round rectangular tenon according to claim 1, characterized in that: The male joint (2) is welded to one end of the main chord, and a transition fillet is provided at the connection between the male joint and the main chord.

5. The standard joint device of the round rectangular tenon according to claim 1, characterized in that: A pin bracket (11) is provided on one side of the female joint (3), and the bottom of the pin bracket (11) is welded to the horizontal web (5) of the standard section device.

6. A tower crane, characterized in that: The tower crane comprises a standard section device of a round rectangular tenon according to any one of claims 1 to 5.

Images