Detachable box girder preformed hole protection device

Abstract

The utility model discloses a detachable box girder preformed hole protection device which is characterized by comprising a protection cylinder used for being inserted into a box girder preformed hole, a mesh cover plate covering the outer opening end of the protection cylinder, tongue grooves symmetrically formed in the two sides of the inner opening end of the protection cylinder and arranged in the radial direction of the protection cylinder, and a top tongue. The pull rod vertically penetrates through the center of the mesh cover plate and can freely slide up and down; a connecting piece is arranged at the inner end of the top tongue, the top tongue spring annularly sleeves the top tongue and is connected between the first connecting piece and the tongue groove, and the outer end of the top tongue slidably penetrates through the tongue groove and the side wall of the protective cylinder. The left and right ends of the relay rod are hinged to the bottom of the pull rod and the inner side of the connecting piece respectively. The device is simple in mounting and dismounting process, high in durability and capable of effectively preventing birds from entering the preformed hole of the box girder to move so as not to influence the service life and the structural safety of the box girder.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, and particularly relates to a detachable box girder reserved hole protection device. BACKGROUND

[0002] For the current industry bridge box girder design, generally provided with box girder drain hole and air hole, to balance temperature change, through the air flow to relieve the stress that internal and external temperature difference can bring, ensure that the box girder has long service life and good structural safety in the use process. But in the bridge use process, often there are birds into the box girder reserved hole nest, resulting in hole blockage, or leave the feces corrosion box girder structure. Therefore, looking for a reliable reserved hole protection measure is the key to guarantee the service life and structural safety of box girder. SUMMARY

[0003] In view of the above problems, the utility model provides a detachable box girder reserved hole protection device to provide the protection of bridge box girder reserved hole, and the installation and dismounting process is simple, the device has high durability, and birds can be effectively prevented from entering the box girder reserved hole to affect the service life and structural safety of the box girder.

[0004] The utility model discloses the following technical scheme realizes.

[0005] A detachable box girder reserved hole protection device, characterized by comprising a protection cylinder inserted into the box girder reserved hole, a mesh cover plate covering the outer mouth end of the protection cylinder, a tongue groove symmetrically arranged at both sides of the inner mouth end of the protection cylinder and arranged along the radial direction of the protection cylinder, a pull rod vertically penetrating the center of the mesh cover plate and capable of freely sliding up and down, a top tongue arranged below the pull rod, a top tongue spring and a relay rod; the inner end of the top tongue is provided with a connecting piece, the top tongue spring is sleeved between the first connecting piece and the tongue groove, and the outer end of the top tongue is slidably penetrated through the tongue groove and the side wall of the protection cylinder; the left and right ends of the relay rod are respectively hingedly connected with the bottom of the pull rod and the inner side of the connecting piece.

[0006] Preferably, the protection device further comprises a pull rod spring, the middle position of the pull rod is provided with a second connecting piece, and the pull rod spring is sleeved between the second connecting piece and the mesh cover plate.

[0007] Preferably, one end of the top tongue abutting against the inner wall of the box girder reserved hole is connected with an arc-shaped abutting piece.

[0008] Preferably, an abutting piece return groove for accommodating the arc-shaped abutting piece is formed in the side wall of the protection cylinder at a position corresponding to the arc-shaped abutting piece.

[0009] Preferably, a pull ring is arranged on the top of the mesh cover plate protruding from the pull rod.

[0010] Preferably, the pull rod protrudes from the top of the mesh cover plate and is provided with a limiting piece to limit the sliding position of the pull rod downwards.

[0011] Preferably, the outer diameter of the protective cylinder is consistent with or slightly smaller than the inner diameter of the box girder reserved hole.

[0012] Preferably, the diameter of the mesh cover plate is 1-2 cm larger than the inner diameter of the box girder reserved hole.

[0013] Compared with the prior art, the protective device has the beneficial effects that: the protective device has a simple structure, is durable, is not easy to fall off after installation, is convenient to maintain and replace in the later period, can effectively prevent birds from entering the box girder reserved hole to build nests and leave excrement, so as to avoid that the birds block the ventilation hole and the drainage hole of the box girder and leave excrement to corrode the structure of the box girder, thereby effectively guaranteeing the service life and structural safety of the box girder. The protective device can also be used for the protection of other structure reserved holes, has strong universality and good popularization and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model in the locked state;

[0015] Figure 2 It is a sectional view of A-A in the utility model; Figure 1

[0016] Figure 3 It is a front view structural schematic diagram of the utility model in the unlocked state;

[0017] Figure 4 It is a sectional view of B-B in the utility model; Figure 3

[0018] It is a front view of the utility model; Figure 5

[0019] It is a bottom view of the utility model; Figure 6

[0020] It is a top view of the utility model; Figure 7

[0021] It is a schematic diagram of the utility model in use; Figure 8 The meanings of the identifiers in the above figures are as follows: protective cylinder 1, abutting piece return groove 101, mesh cover plate 2, tongue groove 3, top tongue 4, connecting piece 401, arc-shaped abutting piece 402, pull rod 5, second connecting piece 501, pull ring 502, limiting piece 503, top tongue spring 6, pull rod spring 7, intermediate link 8, box girder reserved hole 9.

[0022] DETAILED DESCRIPTION

[0023] ​​The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] The present application provides a detachable box girder reserved hole protection device, please refer to Figures 1 to 7 , which comprises a protection cylinder 1 inserted into the box girder reserved hole, a mesh cover plate 2 covering the outer end of the protection cylinder 1, a tongue groove 3 symmetrically arranged at both sides of the inner end of the protection cylinder 1 and arranged radially along the protection cylinder 1, a pull rod 5 vertically penetrating the center of the mesh cover plate 2 and freely sliding up and down, a top tongue 4 arranged below the pull rod, a top tongue spring 6 and a relay rod 8; the inner end of the top tongue 4 is provided with a connecting piece 401, the top tongue spring 6 is sleeved on the top tongue 4 and connected between the first connecting piece 401 and the tongue groove 3, and the outer end of the top tongue 4 slides through the tongue groove 3 and the side wall of the protection cylinder 1; the left and right ends of the relay rod 8 are respectively hinged to the bottom of the pull rod 5 and the inner side of the connecting piece 401; when the pull rod 5 is not pulled up, the top tongue spring 6 is in a natural state, the outer end of the top tongue 4 slides out of the protection cylinder 1 and abuts against the inner wall of the box girder reserved hole 9, at this time the device is in a locked state; when the pull rod 5 is pulled up, the pull rod 5 drives the top tongue to slide into the protection cylinder 1 through the relay rod 8, the outer end of the top tongue does not abut against the inner wall of the box girder reserved hole 9, and the top tongue spring 6 is in a stretched state, at this time the device is in an unlocked state; wherein the protection cylinder 1 is a circular cylinder structure with open upper and lower ends, the thickness of the cylinder wall of the protection cylinder 1 is 2mm; the pull rod 5 and the top tongue 4 are both cylindrical rods; the protection cylinder 1, the mesh cover plate 2 and the pull rod 5 and the top tongue 4 are plated with chromium on the surface of copper, so as to reduce the overall weight of the device while providing good durability and anti-corrosion performance for the device.

[0026] Based on the above structure, the use method or working principle of the present application is as follows: please refer to Figure 3When the box girder reserved hole 9 needs to be shielded, the pull rod 5 is pulled up, so that the top tongue 4 is driven by the relay rod 8 to slide to the inside of the protection cylinder 1, at this time the top tongue is retracted to the tongue groove 3 and does not abut against the inner wall of the box girder reserved hole 9, then the inner opening end of the protection cylinder 1 is inserted into the reserved hole 9 until the mesh cover plate 2 is flush with the opening of the box girder reserved hole 9; please refer to Figure 8 , then the pull rod 5 is released, under the action of the pulling force of the top tongue spring 6, the top tongue spring 6 pulls the connecting piece 401 to make the top tongue 4 slide out of the protection cylinder 1, so that the outer end of the top tongue 4 abuts against the inner wall of the box girder reserved hole 9, so the installation and fixing of the utility model are completed; wherein the abutting friction force between the top tongue 4 and the inner wall of the box girder reserved hole 9 can ensure that the utility model is installed stably and is not easy to fall off; the mesh cover plate 2 can shield the opening of the box girder reserved hole, which does not affect the circulation of air and the drainage of water, but can effectively prevent birds from entering the box girder reserved hole to build nests or leave excrement, so as to protect the service life and structural safety of the box girder; and the protection cylinder 1 inserted into the box girder reserved hole 9 can also support and reinforce the position of the opening of the box girder reserved hole; when the protection device of the utility model needs to be disassembled and maintained, the protection device of the utility model can be taken out for cleaning or replacement by pulling up the pull rod 5.

[0027] Further, in a preferred embodiment, the utility model further includes a pull rod spring 7, a second connecting piece 501 is arranged at the middle position of the pull rod 5, and the pull rod spring 7 is sleeved on the pull rod 5 and connected between the second connecting piece 501 and the mesh cover plate 2; when the pull rod 5 is not pulled up, the pull rod spring 7 and the top tongue spring 6 are in a natural state, and the outer end of the top tongue 4 abuts against the inner wall of the box girder reserved hole 9 outside the protection cylinder 1; based on the above structure, when the pull rod 5 is pulled up, the pull rod 5 drives the top tongue to slide into the protection cylinder 1 through the relay rod 8, the pull rod spring 7 is in a compressed state, and the top tongue spring 6 is in a stretched state; when the pull rod 5 is released, through the cooperation of the pull rod spring 7 and the top tongue spring 6, the acting force between the outer end of the top tongue and the hole wall of the box girder reserved hole can be increased, so that the utility model can be installed more stably and is not easy to fall off.

[0028] In order to increase the abutting surface of the top tongue 4 and the inner wall of the box girder reserved hole 9 to increase the friction force, further, in a preferred embodiment, an arc-shaped abutting piece 402 is connected to one end of the top tongue 4 abutting against the inner wall of the box girder reserved hole 9, the arc-shaped abutting piece 402 is in an arc-shaped sheet structure, the arc and diameter of which are matched with the side wall of the protection cylinder 1, and one side of the arc-shaped abutting piece 402 abutting against the inner wall of the box girder reserved hole 9 is a rough surface, so as to increase the friction force between the arc-shaped abutting piece 402 and the box girder concrete and make the utility model not easy to move after installation.

[0029] Further, in a preferred embodiment, the side wall of the protective cylinder 1 is provided with a contact piece return slot 101 at the position corresponding to the arc-shaped contact piece 402 to accommodate the arc-shaped contact piece 402; when the pull rod 5 is pulled up, the top tongue 4 drives the arc-shaped contact piece 402 to move towards the protective cylinder 1 and is just accommodated in the contact piece return slot 101, so that the arc-shaped contact piece 402 does not contact the inner wall of the box girder reserved hole 9 to hinder the insertion or removal of the protective cylinder 1.

[0030] In order to facilitate the pulling up of the pull rod 5, further, in a preferred embodiment, the pull rod 5 is provided with a pull ring 502 protruding from the top of the mesh cover plate 2.

[0031] In order to fix the position of the pull rod 5 when it is returned, further, in a preferred embodiment, the pull rod 5 is provided with a limiting piece 503 around the top of the mesh cover plate 2 to limit the sliding position of the pull rod 5 downwards; when the pull rod 5 is not pulled up, the limiting piece 503 abuts against the mesh cover plate 2, the pull rod spring 7 and the top tongue spring 6 are in a natural state, and the outer end of the top tongue 4 slides out of the protective cylinder 1 to abut against the inner wall of the box girder reserved hole 9.

[0032] Further, in a preferred embodiment, the outer diameter of the protective cylinder 1 is consistent with or slightly smaller than the inner diameter of the box girder reserved hole 9, so as to avoid excessive friction between the outer wall of the protective cylinder 1 and the inner wall of the box girder reserved hole 9 during the installation or removal of the utility model device.

[0033] In order to completely shield the box girder reserved hole 9 by the mesh cover plate 2, further, in a preferred embodiment, the diameter of the mesh cover plate 2 is 1-2 cm larger than the inner diameter of the box girder reserved hole 9.

Claims

1. A removable box girder preformed hole protection device, characterized by, The protective cylinder is inserted into the reserved hole of the box girder, the mesh cover plate covers the outer end of the protective cylinder, the tongue groove is symmetrically arranged at both sides of the inner end of the protective cylinder and is radially arranged along the protective cylinder, the pull rod vertically penetrates the center of the mesh cover plate and can freely slide up and down, the top tongue is arranged below the pull rod, the top tongue spring and the relay rod are arranged.

2. A removable box girder hole protection device as claimed in claim 1, wherein, The inner end of the top tongue is provided with a connecting piece, the top tongue spring is sleeved on the top tongue and connected between the first connecting piece and the tongue groove, the outer end of the top tongue slides through the tongue groove and the side wall of the protective cylinder.

3. A removable box girder hole protection device as claimed in claim 1, wherein, The left and right ends of the relay rod are respectively hingedly connected with the bottom of the pull rod and the inner side of the connecting piece.

4. A removable box girder hole protection device as claimed in claim 3, wherein, The pull rod spring is arranged, the second connecting piece is arranged at the middle position of the pull rod, and the pull rod spring is sleeved on the pull rod and connected between the second connecting piece and the mesh cover plate.

5. A removable box beam hole protection device as claimed in claim 1, wherein, One end of the top tongue abutting against the inner wall of the reserved hole of the box girder is connected with the arc abutting piece.

6. A removable box beam hole protection device as claimed in claim 1, wherein, The side wall of the protective cylinder is provided with the abutting piece return groove corresponding to the arc abutting piece.

7. A removable box beam hole protection device as claimed in claim 1, wherein, The top of the pull rod protruding from the mesh cover plate is provided with the pull ring.

8. A removable box girder hole protection device as claimed in claim 7, wherein, The top of the pull rod protruding from the mesh cover plate is sleeved with the limiting piece. The outer diameter of the protective cylinder is consistent with or slightly smaller than the inner diameter of the reserved hole of the box girder. The diameter of the mesh cover plate is 1-2 cm larger than the inner diameter of the reserved hole of the box girder.

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