Hollow multi-bolt ball grid connection node and installation method

Abstract

The present invention proposes a welding pad hollow multi-bolt ball grid connection node and installation method, wherein a threaded hole is arranged at the connection position between the hollow bolt ball and the rod member; the sealing plate and the rod member are welded together; the high-strength bolt passes through the sealing plate, passes through the sleeve and cooperates with the threaded hole on the hollow bolt ball; the sleeve and the high-strength bolt are also threadedly matched, and a pin hole is radially opened on the sleeve, and a pin groove is axially opened on the high-strength bolt, and the pin groove includes a first pin groove and a second pin groove which are continuously arranged, the second pin groove is close to the bolt head, and the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt protrudes; the depth of the second pin groove is greater than the first pin groove; the pin passes through the pin hole and slides in contact with the pin groove, and when the pin slides into the second pin groove, the hollow bolt ball and the rod member are connected.

Description

Technical Field

[0001] The invention relates to the technical field of bolt ball grids, and in particular to a welding pad hollow multi-bolt ball grid connection node and an application method. Background Art

[0002] In the space grid structure, some patents (such as CN92239014, CN202022453764.X, CN202022453758.4) disclose some node structures that use bolts to connect hollow bolt balls and rods. The tail of the bolt needs to be fixed in the hollow bolt ball with a nut. Therefore, the construction site is required to install the nut inside the spherical shell, and the hollow spherical shell is closed after the bolts are tightened. This requires a cover plate installation space to be reserved on the surface of the spherical shell so that the cover plate can be used to connect the two hemispherical shells or close the operating hand opening on the spherical shell. However, the existence of the connecting cover plate limits the installation position of the rod, and the two hemispherical shells need to be connected into a whole with bolts and cover plates on site, which increases the difficulty of construction. In addition, the above nodes are all connected by a single bolt, and their bending stiffness and connection stability are limited. When the hollow spherical shell is thin, the spherical shell is prone to buckling failure under pressure. Summary of the invention

[0003] In view of the problems existing in the background technology such as great construction difficulty, limited bending stiffness, connection stability and easy buckling failure of the spherical shell under pressure, the present invention provides a hollow bolt ball node form of multiple bolt-connected rods, which is used to solve the above problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] In the first aspect, the present invention provides a hollow multi-bolt ball grid connection node, including a hollow bolt ball, a sleeve, a pin, a high-strength bolt and a sealing plate, and a threaded hole is arranged at the connection position between the hollow bolt ball and the rod member; the sealing plate is welded to the rod member; the high-strength bolt passes through the sealing plate, passes through the sleeve and cooperates with the threaded hole on the hollow bolt ball; the sleeve and the high-strength bolt are also threadedly matched, and a pin hole is radially opened on the sleeve, and a pin groove is axially opened on the high-strength bolt, and the pin groove includes a first pin groove and a second pin groove which are continuously arranged, the second pin groove is close to the bolt head, and the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the high-strength bolt extending out of the hollow bolt ball; the depth of the second pin groove is greater than the first pin groove; the pin passes through the pin hole and slides in contact with the pin groove, and when the pin slides into the second pin groove, the hollow bolt ball and the rod member are connected.

[0006] As a further technical solution, a pad is welded on the outside of the hollow bolt ball at the connection position with the rod, and threaded holes for high-strength bolts to pass through are opened on the pad; and stiffening ribs are welded on the outside of the pad.

[0007] As a further technical solution, when the pin falls into the second pin, the pin is flush with the outer ring of the sleeve.

[0008] As a further technical solution, the pad is a circular pad with an arc surface on one side and a flat surface on the other side. The radius of the arc surface is consistent with the radius of the hollow bolt ball. The arc surface is tightly attached to the hollow bolt ball and is welded to it by groove butt welding. The flat surface is tightly attached to the sleeve.

[0009] As a further technical solution, the diameter of the pad is consistent with the diameter of the rod, and the minimum sum of the thickness of the pad and the thickness of the hollow bolt ball meets 1.1 times the diameter of the high-strength bolt.

[0010] As a further technical solution, the threaded holes opened in the backing plate and the hollow bolt ball are matched with the high-strength bolts and are continuous. The number of threaded holes is not limited, provided that they do not affect each other when installing the high-strength bolts.

[0011] As a further technical solution, a through hole is provided on the sealing plate at the same position as the threaded hole of the backing plate.

[0012] As a further technical solution, the hollow bolt ball is composed of two hollow hemispheres butt-welded with grooves.

[0013] In a second aspect, the present invention further provides a method for installing a hollow multi-bolt ball grid connection node, comprising the following steps:

[0014] S1. Butt-weld two hollow hemisphere grooves together to form a hollow bolt ball;

[0015] S2. Open several threaded holes on the hollow bolt ball. The number and position of the holes should be such that they do not affect each other when installing high-strength bolts and meet the requirements of the specification.

[0016] S3. Open a through hole on the sealing plate at the same position as the threaded hole on the hollow bolt ball, pass the high-strength bolt through one side of the sealing plate, fix it with a temporary nut, and weld the sealing plate and the rod together with a single-sided fillet weld;

[0017] S4. Transport the hollow bolt ball and the rod to the construction site, recover the temporary nut, and use auxiliary parts to screw the high-strength bolt into the threaded hole of the hollow bolt ball until the pin enters the second pin groove of the pin groove, thereby meeting the anchoring requirements of the high-strength bolt and realizing the tightening of the high-strength bolt and the rod.

[0018] As a further technical solution, S4 includes the following steps: putting a sleeve onto the screw rod of the high-strength bolt, rotating the sleeve until the pin hole on it is aligned with the pin groove on the high-strength bolt, inserting the pin into the pin hole of the sleeve so that the pin contacts the pin groove, rotating the sleeve to drive the pin and the high-strength bolt to rotate, and when the pin is flush with the sleeve, the anchoring requirements of the high-strength bolt are met and the installation is completed.

[0019] Compared with the traditional bolt ball, the present invention has the following beneficial effects:

[0020] 1. The present invention designs a high-strength bolt and sleeve structure. Each bolt adopts a single-sided bolt and is connected by a sleeve. It only needs to rotate the sleeve to tighten the bolt to connect the rod and the bolt ball. Compared with the node using ordinary bolts, it is convenient for on-site construction; and the hollow bolt ball can be pre-welded and formed, without reserving a large installation hole on the ball wall, and without installing a cover plate for closing the ball shell on the surface of the ball shell, and does not occupy the installation space of the rod; at the same time, in order to achieve the position locking and fixation between the high-strength bolt and the sleeve A pin groove is opened axially on the high-strength bolt, and the pin groove is designed to be a first pin groove and a second pin groove which are continuously arranged, and the depth of the second pin groove is greater than that of the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball where the high-strength bolt protrudes; when the high-strength bolt protrudes to the set depth of the threaded hole, the depth of the pin groove suddenly deepens, so that the pin falls into the second pin groove, thereby realizing the locking of the high-strength bolt and the sleeve, and at the same time ensuring that the high-strength bolt has been tightened into place in the hollow bolt ball.

[0021] 3. Welding stiffening ribs on the outside of the pad can disperse the stress to the surface of the hollow bolt ball, which can improve the stress of the hollow bolt ball and increase the bearing capacity of the hollow bolt ball.

[0022] 2. The hollow bolt ball of the present invention is connected to each rod member by multiple bolts, so that the connection node has better bending rigidity and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 A schematic diagram of the connection relationship of various components in an embodiment of the present invention;

[0025] Figure 3 It is an exploded diagram of the structure of an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection relationship between the high-strength bolt and the sleeve according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the high-strength bolt structure according to an embodiment of the present invention;

[0028] Figure 6 It is a structural schematic diagram of a hollow bolt ball connected to a rod after being cut open in an embodiment of the present invention;

[0029] Figure 7 An exploded diagram of the structure disclosed in an embodiment of the present invention;

[0030] Figure 8This is a schematic structural diagram of a pad according to an embodiment of the present invention;

[0031] Numbers in the figure: 1. hollow bolt ball; 2. high-strength bolt; 3. sleeve; 4. pin; 5. pin groove; 6. pin hole; 7. gasket; 8. sealing plate; 9. rod; 10. temporary nut; 11. stiffening rib. DETAILED DESCRIPTION

[0032] In order to understand the present invention more clearly, the following is a detailed description in conjunction with the accompanying drawings and embodiments. It should be noted that the given embodiment is only one kind of implementation method and does not represent all embodiments. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In view of the problems existing in the background technology, such as great construction difficulty, bending stiffness, limited connection stability, and easy buckling failure of the spherical shell under pressure, the present embodiment discloses a hollow bolt ball node form of multiple bolt-connected rods, including a hollow bolt ball, a sleeve, a pin, a high-strength bolt and a sealing plate, wherein a threaded hole is arranged at the connection position between the hollow bolt ball and the rod; the sealing plate is welded to the rod; the high-strength bolt passes through the sealing plate, passes through the sleeve and cooperates with the threaded hole on the hollow bolt ball; the sleeve and the high-strength bolt are also threadedly matched, and a pin hole is radially opened on the sleeve, and a pin groove is axially opened on the high-strength bolt, wherein the pin groove includes a first pin groove and a second pin groove which are continuously arranged, the second pin groove is close to the bolt head, and the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the high-strength bolt extending out of the hollow bolt ball; the depth of the second pin groove is greater than the first pin groove; the pin passes through the pin hole and slides in contact with the pin groove, and when the pin slides into the second pin groove, the hollow bolt ball and the rod are connected.

[0036] The present invention designs the structure of high-strength bolts and sleeves. Each bolt adopts a single-sided bolt and is connected by a sleeve. It only needs to rotate the sleeve to tighten the bolt to connect the rod and the bolt ball. Compared with the node using ordinary bolts, it is convenient for on-site construction; and the hollow bolt ball can be pre-welded and formed, without reserving a large installation hole on the ball wall, and without installing a cover plate for closing the ball shell on the surface of the ball shell, and does not occupy the installation space of the rod; at the same time, in order to realize the position locking and fixation between the high-strength bolt and the sleeve, A pin groove is opened axially on the high-strength bolt, and the pin groove is designed to be a first pin groove and a second pin groove which are continuously arranged, and the depth of the second pin groove is greater than that of the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt protrudes; when the high-strength bolt protrudes to a set depth through the threaded hole, the depth of the pin groove suddenly deepens, so that the pin falls into the second pin groove, thereby realizing the locking of the high-strength bolt and the sleeve, and at the same time ensuring that the high-strength bolt has been tightened into place in the hollow bolt ball.

[0037] Embodiment 1:

[0038] In view of the fact that the shell thickness of the hollow bolt ball is small, this embodiment adopts the method of welding a backing plate outside the hollow bolt ball to increase the strength of the connection point between the hollow multi-bolt ball and the rod. Figure 1-Figure 4The hollow bolt ball node of multiple bolt-connected rods disclosed in this embodiment includes a hollow bolt ball 1, a high-strength bolt 2, a gasket 7 and a sealing plate 8. The hollow bolt ball 1 is welded with the gasket 7. The gasket 7 is used to increase the strength of the connection position between the hollow bolt ball 1 and the rod 9; at the same time, continuous threaded holes are opened in the hollow bolt ball 1 and the gasket 7, the sealing plate 8 is welded with the rod 9, and a through hole corresponding to the threaded hole of the gasket 7 is opened in the sealing plate 8. The high-strength bolt 2 passes through the sealing plate 8, and the high-strength bolt 2 is screwed into the threaded holes of the gasket 7 and the hollow bolt ball 1 by using auxiliary parts until the pin 4 is flush with the sleeve 3, so as to meet the anchoring requirements of the high-strength bolt 2, so as to realize the fastening connection between the hollow bolt ball 1 and the rod 9.

[0039] Specifically, the auxiliary part includes a sleeve 3 and a pin 4, a pin hole 6 is radially opened on the sleeve 3, and a pin groove 5 is axially opened on the high-strength bolt 2, the pin groove 5 includes a first pin groove and a second pin groove which are continuously arranged, the second pin groove is close to the head of the high-strength bolt 2, and the depth of the second pin groove is greater than the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends; that is, when the high-strength bolt 2 extends to the set depth of the threaded hole, the depth of the pin groove 5 suddenly deepens to form the second pin groove, and then the pin 4 falls into the second pin groove to realize the locking of the high-strength bolt 2 and the sleeve 3, and at this time, the top of the pin 4 is flush with the outer ring of the sleeve 3; the sleeve 3 is sleeved on the high-strength bolt 2, the pin 4 passes through the pin hole 6 to reach the pin groove 5, and the pin 4 is in sliding contact with the pin groove 5.

[0040] In this embodiment, by designing the structure of high-strength bolts and sleeves, each high-strength bolt 2 adopts a single-sided bolt and is connected by a sleeve 3. It is only necessary to rotate the sleeve 3 to tighten the bolt to connect the rod and the bolt ball. Compared with the node using ordinary bolts, it is convenient for on-site construction; and the hollow bolt ball can be pre-welded and formed, without reserving a large installation hole on the ball wall, and without installing a cover plate for closing the ball shell on the surface of the ball shell, and does not occupy the installation space of the rod; at the same time, in order to achieve the position locking and Fixing, a pin groove 5 is provided in the axial direction of the high-strength bolt 2, and the pin groove 5 is designed to be a first pin groove and a second pin groove which are continuously arranged, and the depth of the second pin groove is greater than that of the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends; when the high-strength bolt extends to a set depth through the threaded hole, the depth of the pin groove suddenly deepens, so that the pin falls into the second pin groove just right, thereby realizing the locking of the high-strength bolt and the sleeve; at the same time, it can also ensure that the high-strength bolt has been tightened into place in the hollow bolt ball;

[0041] It needs to be further explained that, since the hollow bolt ball of the present invention is welded and sealed in advance, it is difficult to judge whether the high-strength bolt has been fully tightened when connecting the hollow bolt ball and the rod. The present invention designs the length of the first pin groove so that the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends. As long as the high-strength bolt extends out of the hollow bolt ball to a set length, the pin will fall exactly into the second pin groove. This design ensures that the high-strength bolt is fully tightened when connecting the hollow bolt ball and the rod.

[0042] Furthermore, in this embodiment, stiffening ribs may be welded on the outer side of the pad 7 to disperse the stress to the surface of the hollow bolt ball 1 , thereby improving the stress of the hollow bolt ball 1 and increasing the bearing capacity of the hollow bolt ball 1 .

[0043] Specifically, the pad 7 is a circular pad with an arc surface on one side and a flat surface on the other side. The radius of the arc surface is consistent with the radius of the hollow bolt ball 1. The arc surface is close to the hollow bolt ball 1 and is welded to it by groove butt welding. The flat surface is close to the sleeve 3. The diameter of the pad 7 can be consistent with the diameter of the rod 9. The minimum sum of the thickness of the pad 7 and the thickness of the hollow bolt ball 1 can be 1.1 times the diameter of the high-strength bolt 2. The threaded holes opened in the pad 7 and the hollow bolt ball 1 are matched with the high-strength bolt 2 and are continuous. The number of threaded holes is not limited, and it is subject to not affecting each other when installing the high-strength bolts.

[0044] Specifically, a through hole is provided on the sealing plate 8 at the same position as the threaded hole of the backing plate 7, and the sealing plate 8 and the rod 9 are welded together by single-sided fillet welding.

[0045] Specifically, the hollow bolt ball 1 is composed of two hollow hemispheres butt-welded with grooves, and the hollow bolt ball 1 has been welded before the rod is installed;

[0046] Furthermore, the method for installing the hollow multi-bolt ball grid connection node in this embodiment includes the following steps:

[0047] S1, butt-welding two hollow hemisphere grooves together to form a hollow bolt ball 1;

[0048] S2, butt weld the backing plate 7 and the hollow bolt ball 1 together, the position and quantity of the backing plate 7 are determined according to the construction needs. Then, fillet weld the stiffening rib 11 at the connection between the backing plate 7 and the hollow bolt ball 1;

[0049] S3, opening a plurality of threaded holes on the backing plate 5 and the hollow bolt ball;

[0050] S4. Open a through hole on the sealing plate 8, the position of which is the same as that of the threaded hole on the backing plate 7, pass the high-strength bolt 2 through one side of the sealing plate 8, fix it with a temporary nut 10, and weld the sealing plate 8 and the rod 9 together with a single-sided fillet weld;

[0051] S5. Transport the hollow bolt ball 1 and the rod 9 to the construction site, recover the temporary nut 10, and use auxiliary parts to screw the high-strength bolt 2 into the threaded holes of the pad 7 and the hollow bolt ball 1 until the pin 4 enters the deep part of the pin groove 5 to meet the anchoring requirements of the high-strength bolt 2 and realize the tightening of the high-strength bolt 2 and the rod 9.

[0052] Specifically, S5 includes the following steps: sleeve 3 is put onto the screw rod of the high-strength bolt 2, sleeve 3 is rotated until the pin hole 6 thereon is aligned with the pin groove 5 on the high-strength bolt 2, pin 4 is inserted into the pin hole 6 of sleeve 3 so that pin 4 contacts with pin groove 5, sleeve 3 is rotated to drive pin 4 and high-strength bolt 2 to rotate, and when pin 4 is flush with sleeve 3, the anchoring requirement of high-strength bolt 2 is met and installation is completed.

[0053] Embodiment 2:

[0054] This embodiment is mainly for the case where the thickness of the hollow bolt ball 1 is large and no pad is needed, that is, the hollow multi-bolt ball grid connection node without pad is used, combined with the attached Figure 4-Figure 8 When the thickness of the spherical shell is large, the hollow multi-bolt spherical grid connection node without a pad is used, including a hollow bolt ball 1, a high-strength bolt 2, a sealing plate 8 and a rod 9. The hollow bolt ball 1 has multiple groups of threaded holes along the radial direction of the bolt ball. The sealing plate 8 is welded to the rod 9 and has through holes corresponding to the threaded holes of the bolt ball. Both sides of the sealing plate 8 are arc surfaces. The high-strength bolt 2 passes through the sealing plate 8 and is fixed with a temporary nut 10 during transportation. The high-strength bolt is screwed into the threaded hole of the hollow bolt ball 1 using an auxiliary part until the pin 4 is flush with the sleeve 3 to meet the anchoring requirements of the high-strength bolt 2, so as to achieve a tight connection between the hollow bolt ball 1 and the rod 9.

[0055] Specifically, the auxiliary part includes a sleeve 3 and a pin 4, a pin hole is radially opened on the sleeve 3, and a pin groove 5 is axially opened on the high-strength bolt 2, the pin groove 5 includes a first pin groove and a second pin groove which are continuously arranged, the second pin groove is close to the head of the high-strength bolt 2, and the depth of the second pin groove is greater than the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends; that is, when the high-strength bolt 2 extends out of the threaded hole to a set depth (which can be 5 mm), the depth of the pin groove 5 suddenly deepens to form the second pin groove, and then the pin 4 falls into the second pin groove to realize the locking of the high-strength bolt 2 and the sleeve 3, at which time the top of the pin 4 is flush with the outer ring of the sleeve 3; the sleeve 3 is sleeved on the high-strength bolt 2, the pin 4 passes through the pin hole 6 to reach the pin groove 5, and the pin 4 is in sliding contact with the pin groove 5.

[0056] In this embodiment, by designing the structure of high-strength bolts and sleeves, each high-strength bolt 2 adopts a single-sided bolt and is connected by a sleeve 3. It is only necessary to rotate the sleeve 3 to tighten the bolt to connect the rod and the bolt ball. Compared with the node using ordinary bolts, it is convenient for on-site construction; and the hollow bolt ball can be pre-welded and formed, without reserving a large installation hole on the ball wall, and without installing a cover plate for closing the ball shell on the surface of the ball shell, and does not occupy the installation space of the rod; at the same time, in order to achieve the position locking and Fixing, a pin groove 5 is provided in the axial direction of the high-strength bolt 2, and the pin groove 5 is designed to be a first pin groove and a second pin groove which are continuously arranged, and the depth of the second pin groove is greater than that of the first pin groove; the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends; when the high-strength bolt extends to a set depth through the threaded hole, the depth of the pin groove suddenly deepens, so that the pin falls into the second pin groove just right, thereby realizing the locking of the high-strength bolt and the sleeve; at the same time, it can also ensure that the high-strength bolt has been tightened into place in the hollow bolt ball;

[0057] It needs to be further explained that, since the hollow bolt ball of the present invention is welded and sealed in advance, it is difficult to judge whether the high-strength bolt has been fully tightened when connecting the hollow bolt ball and the rod. The present invention designs the length of the first pin groove so that the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the hollow bolt ball through which the high-strength bolt extends. As long as the high-strength bolt extends out of the hollow bolt ball to a set length, the pin will fall exactly into the second pin groove. This design ensures that the high-strength bolt is fully tightened when connecting the hollow bolt ball and the rod.

[0058] Furthermore, both sides of the sleeve 3 of this embodiment are respectively milled into arc surfaces consistent with the spherical surface and the sealing plate; the sleeve 3 is sleeved on the high-strength bolt 2, the pin 4 passes through the pin hole 6 to reach the pin groove 5, and the pin 4 is in sliding contact with the pin groove 5.

[0059] Furthermore, the sealing plate 8 of the present embodiment is a circular sealing plate with arc surfaces on both sides, and the sealing plate 8 and the rod 9 are welded together by a single-sided fillet weld.

[0060] Furthermore, the hollow bolt ball 1 of this embodiment is composed of two hollow hemispheres butt-welded with grooves, and the hollow bolt ball 1 has been welded before the rod is installed;

[0061] The installation method of the hollow multi-bolt ball grid connection node proposed in this embodiment includes the following steps:

[0062] S1, butt-welding two hollow hemisphere grooves together to form a hollow bolt ball 1;

[0063] S2, opening a plurality of threaded holes on the hollow bolt ball 1;

[0064] S3. Open a through hole on the sealing plate 8, the position of which corresponds to the position of the threaded hole on the hollow bolt ball 1, pass the high-strength bolt through one side of the sealing plate 8, fix it with a temporary nut 10, and weld the sealing plate 8 and the rod 9 together with a single-sided fillet weld;

[0065] S4. Transport the hollow bolt ball 1 and the rod 9 to the construction site, recover the temporary nut 10, and use auxiliary parts to screw the high-strength bolt 2 into the threaded hole of the hollow bolt ball 1 until the pin 4 enters the deep part of the nail groove 5 to meet the anchoring requirements of the high-strength bolt 2 and realize the tightening of the high-strength bolt 2 and the rod 9.

[0066] Specifically, S5 includes the following steps: sleeve 3 is put onto the screw rod of the high-strength bolt 2, sleeve 3 is rotated until the pin hole 6 thereon is aligned with the pin groove 5 on the high-strength bolt 2, pin 4 is inserted into the pin hole 6 of sleeve 3 so that pin 4 contacts with pin groove 5, sleeve 3 is rotated to drive pin 4 and high-strength bolt 2 to rotate, and when pin 4 is flush with sleeve 3, the anchoring requirement of high-strength bolt 2 is met and installation is completed.

Claims

1. Hollow multi-bolt ball grid connection node, characterized by: It includes a hollow bolt ball, a sleeve, a pin, a high-strength bolt and a sealing plate, and a threaded hole is provided at the connection position between the hollow bolt ball and the rod member; the sealing plate and the rod member are welded together; the high-strength bolt passes through the sealing plate, passes through the sleeve and matches with the threaded hole on the hollow bolt ball; the sleeve and the high-strength bolt are also threadedly matched, and a pin hole is radially provided on the sleeve, and a pin groove is axially provided on the high-strength bolt, and the pin groove includes a first pin groove and a second pin groove which are continuously provided, the second pin groove is close to the bolt head, and the length of the first pin groove on the axis of the high-strength bolt is equal to the length of the threaded hole on the high-strength bolt extending out of the hollow bolt ball; the depth of the second pin groove is greater than the first pin groove; the pin passes through the pin hole and slides in contact with the pin groove, and when the pin slides into the second pin groove, the hollow bolt ball and the rod member are connected; A backing plate is welded at the connection position between the outer side of the hollow bolt ball and the rod, and a threaded hole for the high-strength bolt to pass through is opened on the backing plate; Weld stiffening ribs on the outside of the pad; The diameter of the pad is consistent with the diameter of the rod, and the minimum sum of the thickness of the pad and the thickness of the hollow bolt ball meets 1.1 times the diameter of the high-strength bolt; The structure of high-strength bolts and sleeves, each bolt adopts a single-sided bolt and is connected by a sleeve, the hollow bolt ball is welded with a backing plate, and the backing plate is used to increase the strength of the connection position between the hollow bolt ball and the rod; at the same time, continuous threaded holes are opened in the hollow bolt ball and the backing plate, the sealing plate and the rod are welded together, and a through hole corresponding to the threaded hole of the backing plate is opened in the sealing plate, the high-strength bolt passes through the sealing plate, and the high-strength bolt is screwed into the threaded holes of the backing plate and the hollow bolt ball by using an auxiliary part until the pin is flush with the sleeve, so as to meet the anchoring requirements of the high-strength bolt, so as to realize the fastening connection between the hollow bolt ball and the rod; When the pin falls into the second pin groove, the pin is flush with the outer ring of the sleeve; The backing plate is a circular backing plate, with one side being an arc surface and the other side being a plane surface, the radius of the arc surface being consistent with the radius of the hollow bolt ball, the arc surface being closely attached to the hollow bolt ball and being butt-welded with the hollow bolt ball by groove, and the plane surface being closely attached to the sleeve; The threaded holes opened in the backing plate and the hollow bolt ball are matched with the high-strength bolts and are continuous. The number of threaded holes is not limited, provided that they do not affect each other when installing the high-strength bolts; The sealing plate is provided with a through hole at the same position as the threaded hole of the backing plate; The hollow bolt ball is formed by butt welding two hollow hemispheres with grooves.

2. The method for installing the hollow multi-bolt ball grid connection node according to claim 1, characterized in that: The following steps are involved: S1. Butt-weld two hollow hemisphere grooves together to form a hollow bolt ball; S2. Open several threaded holes on the hollow bolt ball. The number and position of the holes should be such that they do not affect each other when installing high-strength bolts and meet the requirements of the specification. S3. Open a through hole on the sealing plate at the same position as the threaded hole on the hollow bolt ball, pass the high-strength bolt through one side of the sealing plate, fix it with a temporary nut, and weld the sealing plate and the rod together with a single-sided fillet weld; S4. Transport the hollow bolt ball and the rod to the construction site, recover the temporary nut, and use auxiliary parts to screw the high-strength bolt into the threaded hole of the hollow bolt ball until the pin enters the second pin groove of the pin groove, thereby meeting the anchoring requirements of the high-strength bolt and realizing the tightening of the high-strength bolt and the rod.

3. The method for installing a hollow multi-bolt ball grid connection node according to claim 2, characterized in that: The S4 The method comprises the following steps: putting a sleeve onto the screw rod of the high-strength bolt, rotating the sleeve until the pin hole on the sleeve is aligned with the pin groove on the high-strength bolt, inserting the pin into the pin hole of the sleeve so that the pin contacts the pin groove, rotating the sleeve to drive the pin and the high-strength bolt to rotate, and when the pin is flush with the sleeve, the anchoring requirement of the high-strength bolt is met and the installation is completed.

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