Hoop clamping groove type waterproof connecting device for inclined inhaul cable tower end

Abstract

The utility model relates to an inclined inhaul cable tower end hoop clamping groove type waterproof connecting device, and belongs to the technical field of bridge or building inhaul cable structures. Comprising an extension pipe, one end of the extension pipe is arranged in a pre-buried pipe, the other end of the extension pipe is covered with an outer sleeve, a plurality of through holes are formed in the periphery of a pipe opening in the tail end of the pre-buried pipe and formed in the radial direction of the pre-buried pipe, threaded sleeves are arranged in the through holes in a penetrating mode, and inner cavities of the threaded sleeves are communicated with an inner cavity of the pre-buried pipe. The embedded pipe is provided with a plurality of threaded sleeves, stud pins are screwed in the threaded sleeves respectively, one end of each stud pin is fixed in the corresponding threaded sleeve, the other end of each stud pin extends into an inner cavity of the embedded pipe, a fastener is arranged on the periphery of one end of the extending pipe, a clamping unit is arranged on the fastener, and the clamping units are connected with the stud pins in a clamped mode. The structure is simple, and rainwater is effectively prevented from entering the inhaul cable from the tower end extension pipe; the cable can be installed before and after penetrating, is convenient to assemble and disassemble, facilitates future overhaul and maintenance, does not need to be welded and fixed with the embedded pipe after being installed, and avoids the potential fire hazard caused by welding.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cable-stayed cable tower end hoop clamping groove type waterproof connecting device and belongs to the technical field of bridge or building cable structure. BACKGROUND

[0002] As the main stressed member of bridge or building structure, the outer sleeve pipe of cable-stayed cable is generally connected with the tower end by a section of extension pipe component, in order to prevent rainwater from entering the cable and causing the corrosion of prestressed tendon and anchorage device, thereby affecting the service life of the cable, the existing steel strand cable tower end extension pipe component adopts the following waterproof structure modes:

[0003] 1) For the project using climbing formwork construction, the tower end embedded pipe must be lengthened to expose the tower wall for the installation of waterproof connecting device, which greatly increases the workload, and the lengthening and welding of embedded pipe is high-altitude operation, which has certain danger;

[0004] 2) The fixed ring is of integral structure, is heavy in quality, and needs to be sleeved on the extension pipe in advance, and if forgotten before cable threading, it cannot be installed subsequently;

[0005] 3) After the fixed ring is welded with the embedded pipe, it is not conducive to the later maintenance and maintenance of the cable;

[0006] 4) The sparks generated by welding may burn the already installed HDPE outer sleeve pipe, and there is a fire safety hazard. CONTENT OF THE UTILITY MODEL

[0007] The utility model solves the technical problem in the prior art, provides a cable-stayed cable tower end hoop clamping groove type waterproof connecting device, which is simple in structure, effectively prevents rainwater from entering the cable from the tower end extension pipe, can be installed before and after cable threading, is convenient to assemble and disassemble, is convenient for later maintenance and maintenance, does not need to be welded with the embedded pipe after installation, and avoids the fire safety hazard caused by welding.

[0008] The utility model discloses a technical scheme that solves the above problems, which is a stay cable tower end hoop clamping groove type waterproof connecting device, comprising an extension pipe, one end of the extension pipe is arranged in a pre-buried pipe, the other end of the extension pipe is covered with a sleeve pipe, a plurality of through holes are arranged on the outer periphery of the end of the pre-buried pipe in a circumferential and uniform manner, the through holes are arranged along the radial direction of the pre-buried pipe, a threaded sleeve is arranged in each through hole, the inner cavity of the threaded sleeve is in communication with the inner cavity of the pre-buried pipe, a stud pin is arranged in the inner cavity of the threaded sleeve, one end of the stud pin is fixed in the threaded sleeve, and the other end of the stud pin extends into the inner cavity of the pre-buried pipe, a fastener is arranged on the outer periphery of one end of the extension pipe arranged in the pre-buried pipe, a clamping unit is arranged on the fastener, and the clamping unit is clamped with the stud pin, so that the fastener is fixedly connected with the pre-buried part.

[0009] The distance between the through hole at the end of the pre-buried pipe and the tower wall is 50-200 mm.

[0010] The fastener is a hoop structure with two halves, and the two halves are fixed to the outer periphery of the extension pipe by bolts.

[0011] The clamping unit comprises an annular upper limiting rib plate and an annular lower limiting rib plate, the upper limiting rib plate and the lower limiting rib plate are arranged in an upper-lower spaced manner, and the two are fixed to the outer periphery of the fastener; the gap between the upper limiting rib plate and the lower limiting rib plate constitutes a rotating cavity; a plurality of circumferentially and uniformly distributed clamping grooves are arranged on the upper limiting rib plate, a plurality of limiting baffle unit groups are arranged on the bottom of the upper limiting rib plate, each limiting baffle unit has a clamping cavity, and the clamping cavity is arranged on one side of the corresponding clamping groove; the stud pin is arranged in the clamping cavity, and the upper limiting rib plate is supported on the top of the stud pin.

[0012] Any one of the limiting baffle units comprises a first limiting baffle and a second limiting baffle, the first limiting baffle is close to the clamping groove, and the gap between the first limiting baffle and the second limiting baffle constitutes the clamping cavity.

[0013] The length of the first limiting baffle is less than the length of the second limiting baffle.

[0014] The number of the clamping grooves is 3-6.

[0015] A limiting boss is arranged on the outer periphery of the pipe opening of the extension pipe arranged in the pre-buried pipe, and the hoop is close to the limiting boss.

[0016] Compared with the prior art, the utility model has the advantages that the stay cable tower end hoop clamping groove type waterproof connecting device,

[0017] (1) The waterproof performance is excellent, the position of the limiting boss on the upper end of the extension pipe can be determined according to the actual situation of the project, the extension pipe is ensured to extend into the pre-buried pipe by a certain distance, and rainwater is prevented from flowing into the extension pipe under the influence of wind;

[0018] (2) installation site without welding, to avoid the fire hazard caused by welding;

[0019] (3) without pre-burying pipe to the tower end exposed to the tower wall, to avoid high-altitude welding operations, especially suitable for the project using climbing form construction or tower end pre-burying pipe can not be exposed to the tower wall project;

[0020] (4) fastener is a two half type of hoop, installation time before and after the cable can be installed; light weight and easy to install and disassemble, easy for future maintenance and repair work. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a kind of cable-stayed tower end hoop clamping groove type waterproof connection device installation schematic diagram of the embodiment of the utility model;

[0022] Figure 2 is a kind of cable-stayed tower end hoop clamping groove type waterproof connection device schematic diagram of the embodiment of the utility model;

[0023] Figure 3 is a kind of cable-stayed tower end hoop clamping groove type waterproof connection device front view of the embodiment of the utility model;

[0024] Figure 4 is a kind of cable-stayed tower end hoop clamping groove type waterproof connection device left view of the embodiment of the utility model;

[0025] In the figure 1 pre-burying pipe, 2 screw sleeve, 3 screw column pin, 4 hoop, 4.1 upper limit rib plate, 4.2 lower limit rib plate, 4.3 first limit baffle, 4.4 second limit baffle, 4.5 clamping groove, 5 extension pipe, 6 HDPE outer sleeve pipe, 7 tower wall, 8 limit boss. DETAILED DESCRIPTION

[0026] The utility model is further described in detail in connection with the drawings embodiment.

[0027] As Figure 1As shown, the tower end cable clamp groove type waterproof connecting device in the embodiment includes a pre-buried pipe 1, the pre-buried pipe 1 is embedded in the tower wall 7, a plurality of annularly distributed through holes are formed in the end of the pre-buried pipe 1, the through holes are radially formed in the pre-buried pipe 1, and the distance between the through holes in the end of the pre-buried pipe 1 and the tower wall 7 is about 50-200 mm. One end of an extension pipe 5 is arranged in the pre-buried pipe 1, and the other end of the extension pipe 5 is covered with an HDPE outer sleeve pipe 6. A threaded sleeve 2 is arranged in each through hole, the inner diameter of the through hole is matched with the outer diameter of the threaded sleeve 2, the threaded sleeve 2 is fixed in the through hole by welding, and the inner cavity of the threaded sleeve 2 is in communication with the inner cavity of the pre-buried pipe. A stud pin 3 is arranged in the threaded sleeve 2 in advance, one end of the stud pin 3 is fixed in the threaded sleeve 2, and the other end of the stud pin 3 extends into the inner cavity of the pre-buried pipe 1. The extension pipe 5 arranged in the pre-buried pipe 1 is provided with a two-piece clamp 4 on the outer periphery of one end, and the clamp 4 is fixed to the outer periphery of the extension pipe 5 by bolts. A clamping unit is arranged on the outer periphery of the clamp 4, the clamping unit is clamped with the stud pin 3, and the fastener is fixedly connected with the pre-buried pipe.

[0028] The part of the stud pin 3 extending out of the inner cavity of the pre-buried pipe should be smooth, and the sharp edges should be rounded.

[0029] As shown in Figure 2 , 3 , the clamping unit includes an annular upper limiting rib plate 4.1 and an annular lower limiting rib plate 4.2, the upper limiting rib plate 4.1 and the lower limiting rib plate 4.2 are fixed to the outer periphery of the clamp 4 in an upper-lower spaced manner, and the gap between the upper limiting rib plate 4.1 and the lower limiting rib plate 4.2 forms a rotating cavity. Four annularly distributed clamping grooves 4.5 are formed in the upper limiting rib plate 4.1, and four sets of limiting baffle units are arranged on the bottom of the upper limiting rib plate 4.1, the limiting baffle unit has a clamping cavity arranged on the side corresponding to the clamping groove. Any one set of limiting baffle units includes a first limiting baffle 4.3 and a second limiting baffle 4.4 arranged in an annularly spaced manner, the first limiting baffle 4.3 is close to the clamping groove 4.5; the first limiting baffle 4.3 and the second limiting baffle 4.4 are spaced to form a clamping cavity, the clamping groove 4.5 is aligned with the corresponding stud pin 3, the stud pin 3 enters the rotating cavity, the extension pipe 5 is rotated, the rotating cavity is rotated, the clamping cavity is aligned with the stud pin, then the extension pipe is pulled down, the stud pin enters the clamping cavity, the top of the stud pin supports the upper limiting rib plate, and the clamping of the fastener and the pre-buried pipe is realized.

[0030] The length of the first limiting baffle is shorter than the length of the second limiting baffle, so that the stud pin can enter the clamping cavity.

[0031] A limiting boss 8 is arranged on the outer periphery of the pre-buried pipe, the clamp is close to the limiting boss 8, and the clamp is prevented from sliding off after installation.

[0032] The clamping groove on the hoop is aligned with the protruding stud pin in the embedded pipe, the extension pipe is pushed upward, the stud pin enters the rotating cavity through the clamping groove, the extension pipe is rotated to drive the clamping cavity to be aligned with the stud pin, the extension pipe is pulled downward, the stud pin enters the clamping cavity, i.e. the upper limiting rib plate is supported on the stud pin, the extension pipe is loosened, the stud pin is between the first limiting baffle and the second limiting baffle, and the installation of the cable-stayed tower end hoop clamping groove type waterproof connecting device is completed.

[0033] The position of the limiting boss on the upper end of the extension pipe can be determined according to actual conditions of a project, so as to ensure that the extension pipe extends into the embedded pipe by a certain distance, and to avoid rainwater from flowing backward into the extension pipe under the influence of wind; welding is not required on site during installation, so as to avoid fire hazards caused by welding; the embedded pipe at the tower end does not need to be lengthened to the exposed tower wall, so as to avoid high-altitude welding operation, and the method is particularly suitable for projects in which a main tower is constructed by using a climbing form or projects in which the embedded pipe at the tower end cannot be exposed to the tower wall; the fastener is a two-piece hoop, which is light in weight and convenient to assemble and disassemble, and can be installed before and after the cable is passed, and is beneficial to future maintenance and overhaul operations.

[0034] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and any technical solution formed by using equivalent transformation or equivalent replacement shall fall within the protection scope of the utility model claim.

Claims

1. A cable-stayed tower end ferrule slot type waterproof connection device, characterized in that: The utility model provides an embedded pipe and extension pipe fixing device, including extension pipe, one end of extension pipe is located in embedded pipe, the other end of extension pipe is covered with outer sleeve, a plurality of annularly distributed through holes are formed in the periphery of the pipe mouth of the embedded pipe, the through holes are formed along the radial direction of the embedded pipe, a plurality of annularly distributed threaded sleeves are arranged in the through holes, the inner cavities of the threaded sleeves are in communication with the inner cavity of the embedded pipe, a plurality of annularly distributed threaded studs are arranged in the threaded sleeves, one end of the threaded studs is fixed in the threaded sleeves, and the other end of the threaded studs extends into the inner cavity of the embedded pipe, a fastener is arranged on the periphery of the one end of the extension pipe located in the embedded pipe, a clamping unit is arranged on the fastener, the clamping unit is clamped with the threaded studs, and the fastener is fixedly connected with the embedded part.

2. The tower end cable grip groove type waterproof connecting device according to claim 1, characterized in that: The distance between the through hole of the pipe mouth of the embedded pipe and the tower wall is 50-200mm.

3. The tower end cable grip groove type waterproof connecting device according to claim 1, characterized in that: The fastener is a two-piece hoop structure, and the two pieces are fixed to the periphery of the extension pipe by bolts.

4. The tower end cable grip groove type waterproof connecting device according to claim 1, characterized in that: The clamping unit comprises an annular upper limiting rib plate and an annular lower limiting rib plate, the upper limiting rib plate and the lower limiting rib plate are arranged in an upper-lower interval, and the upper limiting rib plate and the lower limiting rib plate are fixed to the periphery of the fastener; the gap between the upper limiting rib plate and the lower limiting rib plate constitutes a rotating cavity; a plurality of annularly distributed clamping grooves are formed in the upper limiting rib plate, a plurality of sets of limiting baffle units are arranged at the bottom of the upper limiting rib plate, the limiting baffle units each have a clamping cavity, and the clamping cavity is arranged on one side of the corresponding clamping groove; the threaded stud is arranged in the clamping cavity, and the upper limiting rib plate is supported on the top of the threaded stud.

5. The tower end cable grip groove type waterproof connecting device according to claim 4, characterized in that: Any limiting baffle unit comprises a first limiting baffle and a second limiting baffle, the first limiting baffle is close to the clamping groove, and the gap between the first limiting baffle and the second limiting baffle constitutes the clamping cavity.

6. The tower end cable grip groove type waterproof connecting device according to claim 5, characterized in that: The length of the first limiting baffle is less than the length of the second limiting baffle.

7. The tower end cable grip groove type waterproof connecting device according to claim 4, characterized in that: The clamping groove is provided with 3-6 clamping grooves.

8. The tower end cable grip groove type waterproof connecting device according to claim 1, characterized in that: The periphery of the pipe mouth of the extension pipe located in the embedded pipe is provided with a limiting boss, and the hoop is close to the limiting boss.

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