High-strength bolt for box culvert connection

Abstract

The utility model relates to the technical field of bolts, in particular to a high-strength bolt used for box culvert connection, which comprises a screw rod, a non-return component, an elastic component and an elastic component, the locking assembly is arranged on the non-return assembly and used for fixing the non-return assembly; the non-return assembly and the locking assembly are arranged at the end close to the nut, when the nut is rotated, the nut can drive the non-return wheel to rotate together, the limiting head can slide along the inclined face of the non-return wheel and enter the next trapezoidal groove, the other side of the non-return wheel is a vertical face, and the nut can be prevented from rotating reversely; after the nut is screwed, the movable rod can be pressed downwards, so that the inserting block is inserted into the inserting groove, meanwhile, the locking rod is inserted into the locking hole, the movable rod abuts against the limiting head, locking is completed, and therefore the nut can be completely fixed and prevented from being loosened when vibrated.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a high-strength bolt used for box culvert connection. Background Art

[0002] The shield method is a fully mechanized construction method in the dark excavation method. It pushes the shield machine into the ground, supports the surrounding rock with the shield shell and segments to prevent collapse into the tunnel, and excavates the soil in front of the excavation face with a cutting device, transports it out of the hole with an excavation machine, pressurizes it at the rear with a jack, and assembles prefabricated concrete segments to form a mechanized construction method for the tunnel structure. Every time the shield machine excavates about 2 meters, the subsequent trolley will lay the box culvert and segments to support the tunnel. A tunnel box culvert about 2 meters wide and 9.8 meters long weighs about 38.2 tons.

[0003] At present, the tunnel track substructure adopts an integral prefabricated box culvert. After the box culvert position is adjusted, it is immediately fixed firmly with bolts. However, the existing bolts will loosen when subjected to vibration and impact during long-term working, thereby reducing the bolt fixing effect and affecting the connection strength of the box culvert. Utility Model Content

[0004] The utility model aims to solve the above-mentioned deficiencies and provide a high-strength bolt for box culvert connection.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A high-strength bolt for box culvert connection, comprising a screw rod, a nut is sleeved on the other end of the screw rod, and further comprising:

[0007] The check assembly is sleeved on the end of the screw rod close to the nut to limit the reverse rotation of the nut;

[0008] The locking assembly is arranged on the non-return assembly and is used for fixing the non-return assembly.

[0009] Furthermore, the non-return assembly includes a mounting plate sleeved on the screw rod, the mounting plate is fixed in the culvert, a non-return wheel is rotatably arranged on the mounting plate, a guide rod is inserted into the nut, and the nut is connected to the non-return wheel through the guide rod, a trapezoidal groove is provided on the non-return wheel, and a limiting assembly matching the trapezoidal groove is also arranged around the non-return wheel, and the locking assembly is arranged on the limiting assembly.

[0010] Furthermore, the limiting assembly includes a fixed block fixed on the mounting plate, a limiting head matching the trapezoidal groove is arranged at the bottom of the fixed block, and the limiting head is slidably connected to the fixed block.

[0011] Furthermore, a first sliding rod slidably connected to the fixed block is arranged on the limit head, and a first spring sleeved on the first sliding rod is arranged between the limit head and the fixed block.

[0012] Furthermore, the locking assembly includes a movable rod arranged on both sides of the fixed block, support plates fixed on the fixed block are arranged on both sides of the top of the movable rod, and the movable rod is rotatably connected to the support plate through a rotating shaft, an insert block is arranged at one end of the movable rod away from the support plate, a slot matching the insert block is opened in the limit head, and a positioning mechanism for fixing the insert block is arranged in the slot.

[0013] Furthermore, a movable groove is provided at the bottom of the slot, the positioning mechanism includes a second sliding rod located in the movable groove, a locking rod is slidably provided on the second sliding rod, a second spring is provided between the locking rod and the bottom of the movable groove and is sleeved on the second sliding rod, and a locking hole matching the locking rod is provided on the insert block.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a non-return assembly and a locking assembly at one end close to the nut. When the nut is rotated, the nut will drive the non-return wheel to rotate together, so that the limit head will slide along the inclined surface of the non-return wheel and enter the next trapezoidal groove, while the other side is a vertical surface, which can prevent the nut from reversing. After the nut is tightened, the movable rod can be pressed downward to insert the insert block into the slot. At the same time, the locking rod will be inserted into the locking hole, so that the movable rod can press the limit head to complete the locking. In this way, the nut can be completely fixed to prevent it from loosening when it is vibrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection between the limit assembly and the locking assembly of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the limit assembly of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the locking assembly of the utility model;

[0021] Figure 5 It is a schematic diagram of the installation of the high-strength bolt and the box culvert of the utility model.

[0022] In the figure: 1. screw rod; 2. nut; 3. check wheel; 4. guide rod; 5. mounting plate; 6. limit assembly; 61. fixing block; 62. limit head; 621. movable groove; 63. first slide bar; 64. first spring; 7. locking assembly; 71. movable rod; 72. support plate; 73. insert block; 731. locking hole; 74. locking rod; 75. second slide bar; 76. second spring. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0025] in Figure 5 The connection relationship between the two box culverts is specifically described. A groove for installing bolts is opened at the corresponding position of the box culvert, and then a screw is inserted into it along one end and extends out from the other box culvert. Then, the two box culverts are fixed by tightening the nut.

[0026] Reference Figure 1-Figure 4 As shown, a high-strength bolt for box culvert connection includes a screw rod 1, a nut 2 is sleeved on the other end of the screw rod 1, and also includes:

[0027] The check assembly is sleeved on one end of the screw rod 1 close to the nut 2, and can also prevent the nut 2 from reversing when the nut 2 is initially tightened during manual operation;

[0028] The locking assembly 7 is arranged on the non-return assembly. Since the non-return assembly itself is movable, the locking assembly 7 can be used to fix the non-return assembly to prevent the non-return assembly from shaking.

[0029] In one embodiment, the non-return assembly includes a mounting plate 5 sleeved on the screw rod 1, the mounting plate 5 is fixed in the box culvert, a non-return wheel 3 is rotatably arranged on the mounting plate 5, a guide rod 4 is inserted into the nut 2, and the nut 2 is connected to the non-return wheel 3 through the guide rod 4, a trapezoidal groove is opened on the non-return wheel 3, and a limiting assembly 6 matching the trapezoidal groove is also arranged around the non-return wheel 3, and a locking assembly 7 is arranged on the limiting assembly 6;

[0030] During installation, the screw rod 1 is inserted from one end, and then the nut 2 is put on the other end. Then, this end of the nut 2 is inserted into the guide rod 4, and the guide rod 4 is also inserted into the non-return wheel 3 for fixation, while the nut 2 can slide back and forth on the guide rod 4. At this time, by rotating the nut 2, the nut 2 will drive the non-return wheel 3 to rotate through the guide rod 4, and the bottom end of the limit assembly 6 will also slide along the trapezoidal groove on the non-return wheel 3, close to the inclined surface. When the non-return wheel 3 wants to reverse, it will be blocked by the straight surface on the other side of the trapezoidal groove.

[0031] In one embodiment, the limiting assembly 6 includes a fixing block 61 fixed on the mounting plate 5, and a limiting head 62 matching the trapezoidal groove is provided at the bottom of the fixing block 61, and a side of the limiting head 62 close to the inclined surface of the trapezoidal groove is also an inclined surface, so that the limiting head 62 can slide along the inclined surface, and the limiting head 62 is slidably connected to the fixing block 61;

[0032] When the check wheel 3 rotates, the limit head 62 will slide backward along the inclined surface, and when it moves to the next trapezoidal groove, the limit head 62 will be directly inserted into it.

[0033] In one embodiment, the limiting head 62 is provided with a first slide bar 63 slidably connected to the fixing block 61, and a first spring 64 sleeved on the first slide bar 63 is provided between the limiting head 62 and the fixing block 61;

[0034] When the limit head 62 moves backward, the first spring 64 will be compressed. After the check wheel 3 rotates to the next trapezoidal groove, the limit head 62 will be pushed into the trapezoidal groove under the elastic force of the first spring 64.

[0035] In one embodiment, the locking assembly 7 includes a movable rod 71 disposed on both sides of the fixed block 61, and support plates 72 fixed to the fixed block 61 are disposed on both sides of the top of the movable rod 71, and the movable rod 71 is rotatably connected to the support plate 72 through a rotating shaft, and an insert block 73 is disposed at one end of the movable rod 71 away from the support plate 72, and a slot matching the insert block 73 is opened in the limit head 62, and a positioning mechanism for fixing the insert block 73 is disposed in the slot;

[0036] After tightening the nut 2, the limit assembly 6 needs to be fixed. At this time, the movable rod 71 needs to be pressed inward so that the plug block 73 is inserted into the slot, and the positioning mechanism can fix the plug block 73 inserted into the slot, thereby completing the locking of the limit assembly 6.

[0037] In one embodiment, a movable groove 621 is formed at the bottom of the slot, and the positioning mechanism includes a second slide bar 75 located in the movable groove 621, a locking rod 74 is slidably disposed on the second slide bar 75, a second spring 76 sleeved on the second slide bar 75 is disposed between the locking rod 74 and the bottom of the movable groove 621, and a locking hole 731 matching with the locking rod 74 is formed on the insert block 73;

[0038] First, the bottom surface of the plug block 73 is an inclined surface, and the side of the locking rod 74 close to the plug block 73 is also an inclined surface. After the plug block 73 is inserted into the slot, the locking rod 74 will be squeezed, and the locking rod 74 will shrink toward the movable groove 621 and compress the second spring 76. After the plug block 73 is fully inserted, the locking rod 74 will be inserted into the locking hole 731 under the elastic force of the second spring 76, thereby fixing the movable rod 71. In this way, the limit head 62 will be fixed under the support of the movable rod 71 to prevent it from shaking up and down when it is vibrated.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A high-strength bolt for box culvert connection, comprising a screw rod (1), the other end of the screw rod (1) being sleeved with a nut (2), characterized in that: Also includes: A non-return assembly is sleeved on one end of the screw rod (1) close to the nut (2) and is used to limit the reverse rotation of the nut (2); A locking assembly (7), arranged on the non-return assembly, and used for fixing the non-return assembly; The non-return assembly comprises a mounting plate (5) sleeved on the screw rod (1), the mounting plate (5) being fixed in the box culvert, a non-return wheel (3) being rotatably arranged on the mounting plate (5), a guide rod (4) being inserted on the nut (2), and the nut (2) being connected to the non-return wheel (3) through the guide rod (4), a trapezoidal groove being provided on the non-return wheel (3), and a limiting assembly (6) cooperating with the trapezoidal groove being provided around the non-return wheel (3), and a locking assembly (7) being arranged on the limiting assembly (6); The limiting assembly (6) comprises a fixing block (61) fixed on the mounting plate (5), a limiting head (62) matching with the trapezoidal groove is arranged at the bottom of the fixing block (61), and the limiting head (62) is slidably connected to the fixing block (61); The locking assembly (7) comprises a movable rod (71) arranged on both sides of the fixed block (61), support plates (72) fixed on the fixed block (61) are arranged on both sides of the top of the movable rod (71), and the movable rod (71) is rotatably connected to the support plate (72) through a rotating shaft, and an insert block (73) is arranged at one end of the movable rod (71) away from the support plate (72), a slot matching the insert block (73) is provided in the limit head (62), and a positioning mechanism for fixing the insert block (73) is provided in the slot.

2. A high-strength bolt for box culvert connection according to claim 1, characterized in that: The limiting head (62) is provided with a first sliding rod (63) slidably connected to the fixing block (61), and a first spring (64) sleeved on the first sliding rod (63) is provided between the limiting head (62) and the fixing block (61).

3. The high-strength bolt for box culvert connection according to claim 1, characterized in that: A movable groove (621) is provided at the bottom of the slot, and the positioning mechanism includes a second slide bar (75) located in the movable groove (621), a locking rod (74) is slidably provided on the second slide bar (75), a second spring (76) sleeved on the second slide bar (75) is provided between the locking rod (74) and the bottom of the movable groove (621), and a locking hole (731) matched with the locking rod (74) is provided on the insert block (73).

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