CN210151575U - Device for setting fireproof protection for stay cable - Google Patents
Device for setting fireproof protection for stay cable Download PDFInfo
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- CN210151575U CN210151575U CN201920346329.1U CN201920346329U CN210151575U CN 210151575 U CN210151575 U CN 210151575U CN 201920346329 U CN201920346329 U CN 201920346329U CN 210151575 U CN210151575 U CN 210151575U
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Abstract
The utility model relates to a set up fire protection's device to suspension cable, including fire prevention regional section L1's fire resistive construction and fire prevention regional section L2's fire resistive construction, fire prevention regional section L1 includes that the embedded pipe exposes section (4) and transitional coupling pipe (3), and transitional coupling pipe (3) set up the end that exposes of exposing the section outside the embedded pipe, and fire prevention regional section L2 is for exposing the nearly section suspension cable above the embedded pipe. The outer surfaces of the pre-buried pipe exposed section (4) and the transition connecting pipe (3) are provided with fireproof coating layers (7); the proximal stay cable comprises a fireproof layer (61) coated outside the stay cable and a protective pipe (62) coated outside the fireproof layer. The mode of spraying the fireproof coating layer is adopted for the embedded pipe and the transition connecting pipe of the steel structure, the fireproof layer and the protective pipe are arranged for the polyethylene sheath which is flammable on the surface of the stay cable, different parts correspond to different fireproof measures, the engineering practical working condition is met, and the engineering cost is favorably reduced.
Description
Technical Field
The utility model relates to a suspension cable firebreak device suitable for bridge and other building engineering structures.
Background
The stay cable is used as a prestressed component and is widely applied to bridges and other cable structural engineering. The outer layer of a conventional stay cable (such as a steel wire stay cable and a steel strand stay cable) is generally a high-density polyethylene sheath or sleeve, the main function of the conventional stay cable is corrosion resistance, but the high-density polyethylene is combustible plastic, so that the stay cable is easily damaged by fire caused by lightning stroke, vehicle accidents, human accidents and the like, and the operation safety of an engineering structure is influenced.
The chinese patent application No. 201710731732.1 discloses a fire-proof cable and a method for manufacturing the same. This scheme has adopted and has set up inside and outside bushing pipe outside the cable to set up the structural style of fireproof material layer between inside and outside bushing pipe. This scheme is provided with the fire prevention material layer for the cable overall length, provides fire protection to the cable body, nevertheless has some shortcomings: 1) the meter weight of the stay cable is changed to a greater extent, and the dead weight of the stay cable is increased, so that the designed use state of the whole stay cable is influenced; 2) due to the complex structure, the manufacture and installation are inconvenient, and the construction cost is greatly increased.
Aiming at the purpose of the fireproof protection of the stay cable, the fireproof protection scheme of the stay cable is designed by combining the effectiveness of actual protection, reducing the influence on the stay cable, controlling the construction cost and other factors, and the like, and the problem needs to be considered by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the prior art provides a be applied to fire protection device of cable-stay bridge to above-mentioned prior art, consider the in-service use occasion of suspension cable, the majority of genesis that leads to the conflagration is generally at bridge floor or ground (vehicle, artificial etc.), the event receives the conflagration to lead to the impaired region of suspension cable also generally to be at the nearly bridge floor or the ground region of suspension cable, consequently, the cable section that is close to bridge floor or ground to the suspension cable, the transition connecting pipe, the section that exposes of pre-buried pipe carries out fire protection setting, satisfy the fire protection requirement of nearly bridge floor or ground suspension cable, protect the suspension cable.
The utility model provides a technical scheme that above-mentioned problem adopted does: a device for setting fire protection on a stay cable comprises a fire protection structure of a fire protection area section L1 and a fire protection structure of a fire protection area section L2, wherein the fire protection area section L1 comprises an exposed section of a pre-buried pipe and a transition connecting pipe, the transition connecting pipe is arranged at the exposed end of the exposed section of the pre-buried pipe, and the fire protection area section L2 is a near-section stay cable exposed above the pre-buried pipe; the outer surfaces of the exposed section of the embedded pipe and the transition connecting pipe are provided with fireproof coating layers; the proximal stay cable comprises a fireproof layer coated outside the stay cable and a protective pipe coated outside the fireproof layer.
Preferably, the fire-proof layer is one or more composite layers selected from a ceramic fiber wrapping layer, a fire-proof cotton wrapping layer, a fire-proof blanket wrapping layer and a fire-proof cloth wrapping layer.
Generally, the stay cable comprises a cable body and a sheath coated on the outer layer of the cable body, wherein the sheath is a hot extruded polyethylene sheath.
Preferably, the protective pipe is wrapped around the periphery of the fireproof layer, and is not only used for fixing the fireproof layer, but also has the function of fire insulation.
In order to facilitate the installation of the protective pipe, the protective pipe is formed by adopting a hasp structure and rolling the protective pipe in a one-piece mode, the two laps are correspondingly formed into an outer hook part and an inner hook part, and the outer hook part and the inner hook part are mutually hooked and pulled to connect the two laps, so that the coating installation of the protective pipe is completed.
Preferably, in order to avoid water vapor from entering the fireproof layer, a waterproof cover is arranged at the top end of the protective pipe, the stay cable penetrates through the waterproof cover, an opening sealing ring is embedded in the inner side face of the waterproof cover, and the opening sealing ring is hooped outside the stay cable body; the lower end of the waterproof cover is of a step hole structure, and the top ends of the fireproof layer and the protective pipe extend into the step hole and are not exposed.
Preferably, the waterproof cover is of a Harvard structure and is formed by oppositely locking two clamping blocks, and the two clamping blocks are provided with corresponding screw holes and are locked through butt bolts.
Furthermore, after the fireproof area section L1 and the fireproof area section L2 are combined, the vertical height from the bridge deck where the embedded pipe is located or the ground is 5-50m, and the height range can be determined economically and reasonably according to factors such as the use working condition of the inhaul cable, the fire risk degree and the like.
The installation method of the device for setting the fireproof protection on the stay cable comprises the following steps
Step 1: wrapping a fireproof material outside the stay cable body corresponding to the fireproof area section L2, and binding and fixing the fireproof material by using an adhesive tape or a steel belt to form a fireproof layer;
step 2: wrapping the protective pipe on the periphery of the fireproof layer;
and step 3: spraying a fireproof coating layer on the outer surfaces of the exposed section of the embedded pipe and the transition connecting pipe in a fireproof area section L1;
and 4, step 4: the upper end of the protective pipe is provided with a waterproof cover, an opening sealing ring is firstly hooped outside a stay cable, two clamping blocks of the waterproof cover are oppositely closed to embrace the stay cable, the opening sealing ring is adjusted to be embedded into a clamping groove in the inner wall of the waterproof cover, the installation height of the waterproof cover is adjusted to enable the upper ends of the protective pipe and the fireproof layer to stretch into a step hole of the waterproof cover, and then the clamping blocks are locked by butt bolts.
Compared with the prior art, the utility model has the advantages of:
(1) the fireproof arrangement material is less, the installation and construction are convenient, the manufacturing cost is low, and the actual requirements of the project are met;
(2) the original structure and function of the stay cable are not required to be changed, the stay cable can be independently installed and detached, and the maintenance is convenient;
(3) the matched fire-proof requirements of the exposed section of the embedded pipe and the connection transition section are comprehensively considered, the mode of spraying a fire-proof coating layer is adopted for the embedded pipe and the transition connection pipe of a steel structure, a fire-proof layer and a protective pipe are arranged for a flammable polyethylene sheath on the surface of the stay cable, different positions correspond to different fire-proof measures, and the construction practical working condition is met.
Drawings
Fig. 1 is a schematic view of a fire protection device and an installation method for providing fire protection to a stay cable according to the present invention.
Fig. 2 is a view from direction B of fig. 1.
Fig. 3 is a schematic view of a fire protection device and an installation method for providing fire protection to a stay cable according to the present invention, wherein the fire protection device includes a top waterproof cover.
Fig. 4 is a partial enlarged view of the point i in fig. 3.
Fig. 5 is a schematic structural view of a stay cable close to a bridge floor or a ground in the prior art.
Fig. 6 is a view taken along direction a in fig. 5.
In the figure: the cable comprises a stress steel wire 1 of a stay cable, a high-density polyethylene sheath 2, a transition connecting pipe 3, an exposed section 4 of an embedded pipe, a bridge floor or ground 5, a fireproof structure 6 of a cable body section, a fireproof coating layer 7, a waterproof cover 8, a fireproof layer 61, a protective pipe 62, a protective pipe lap joint part 63, an opening sealing ring 81 and a butt bolt 82.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
As shown in fig. 1 to 4, the present embodiment relates to a fire protection device for providing fire protection to a stay cable, which includes a fire protection setting of a fire protection area section L1 and a fire protection area section L2, where the fire protection area section L1 includes an exposed section 4 of a pre-buried pipe and a transition connection pipe 3, and a fire protection coating layer 7 for a steel structure is provided on outer surfaces of the exposed section 4 of the pre-buried pipe and the transition connection pipe 3. The fireproof area section L2 is a proximal stay cable exposed above the embedded pipe, and the transition connecting pipe 3 is arranged at the transition part of the embedded pipe and the stay cable. The fireproof structure of the fireproof area section L2 comprises fireproof materials coated outside the stay cable body to form a fireproof layer 61, the fireproof layer further coats the protective pipe 62, and the protective pipe 62 is made of non-combustible metal materials.
The combined vertical height H of the fire-protected sections L1 and L2 from the deck or ground is in the range 5 to 50m, preferably 10 to 30 m.
Further, the fireproof material layer 61 of the fireproof region L2 is a layer or a composite layer formed by ceramic fiber, fireproof cotton, fireproof blanket, fireproof cloth, and the like.
The two laps of the protective pipe are correspondingly formed into an outer hook part and an inner hook part, and the outer hook part and the inner hook part are mutually hooked and pulled to connect the two laps, so that the coating installation of the protective pipe is completed. The protective pipe 62 is mounted outside the fireproof layer 61 in a rolling and wrapping mode and is formed by rolling and lapping in a one-piece mode.
As shown in fig. 3 and 4, a waterproof cover 8 is disposed on the upper ends of the protective pipe 62 and the fireproof layer 61, the stay cable passes through the waterproof cover 8, the waterproof cover 8 is of a harvard structure, and is locked on the stay cable by two clamp blocks which are provided with corresponding screw holes and locked by a butt bolt 82. An opening sealing ring 81 is embedded on the inner side surface of the waterproof cover, and the opening sealing ring 81 is hooped outside the stay cable body. The lower end of the waterproof cover 8 is of a step hole structure, and the top ends of the fireproof layer 61 and the protective pipe 62 extend into the step hole without being exposed.
The installation method of the device for setting the fireproof protection on the stay cable comprises the following operation steps
Step 1: wrapping a fireproof material outside the stay cable body corresponding to the fireproof area section L2, and binding and fixing the fireproof material by using an adhesive tape or a steel belt to form a fireproof layer;
step 2: wrapping a protective pipe on the periphery of the fireproof layer, wherein the length of the protective pipe is slightly longer than that of the fireproof layer;
and step 3: spraying a fireproof coating layer on the outer surfaces of the exposed section of the embedded pipe and the transition connecting pipe in a fireproof area section L1, wherein the step can be completed before a fireproof device is arranged in the fireproof area section L2;
and 4, step 4: the upper end of the protective pipe is provided with a waterproof cover, an opening sealing ring is firstly hooped outside a stay cable, two clamping blocks of the waterproof cover are oppositely closed to embrace the stay cable, the opening sealing ring is adjusted to be embedded into a clamping groove in the inner wall of the waterproof cover, the installation height of the waterproof cover is adjusted to enable the upper ends of the protective pipe and the fireproof layer to stretch into a step hole of the waterproof cover, and then the clamping blocks are locked by butt bolts.
Although the preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a set up fire protection's device to suspension cable which characterized in that: the fireproof structure comprises a fireproof structure of a fireproof area section L1 and a fireproof structure of a fireproof area section L2, wherein the fireproof area section L1 comprises an exposed section (4) of a pre-buried pipe and a transition connecting pipe (3), the transition connecting pipe (3) is arranged at the exposed end of the exposed section of the pre-buried pipe, and the fireproof area section L2 is a near-section stay cable exposed above the pre-buried pipe;
the outer surfaces of the embedded pipe exposed section (4) and the transition connecting pipe (3) are provided with fireproof coating layers (7); the proximal stay cable comprises a fireproof layer (61) coated outside the stay cable and a protective pipe (62) coated outside the fireproof layer.
2. A device for providing fire protection to a stay cable according to claim 1, wherein: the fireproof layer is one or more composite layers selected from a ceramic fiber wrapping layer, a fireproof cotton wrapping layer, a fireproof blanket wrapping layer and a fireproof cloth wrapping layer.
3. A device for providing fire protection to a stay cable according to claim 1, wherein: the stay cable comprises a cable body (1) and a sheath (2) coated on the outer layer of the cable body.
4. A device for providing fire protection to a stay cable according to claim 1, wherein: the protective pipe (62) is wrapped on the periphery of the fireproof layer.
5. A device for providing fire protection to a stay cable according to claim 4, wherein: the two laps of the protective pipe are correspondingly formed into an outer hook part and an inner hook part, and the outer hook part and the inner hook part are mutually hooked and pulled to connect the two laps, so that the coating installation of the protective pipe is completed.
6. A device for providing fire protection to a stay cable according to claim 1, wherein: the top end of the protective pipe is provided with a waterproof cover (8), the stay cable penetrates through the waterproof cover (8), an opening sealing ring (81) is embedded in the inner side surface of the waterproof cover, and the opening sealing ring (81) is hooped outside the stay cable body; the lower end of the waterproof cover (8) is of a step hole structure, and the top ends of the fireproof layer (61) and the protective pipe (62) extend into the step hole without being exposed.
7. A device for providing fire protection to a stay cable according to claim 6, wherein: the waterproof cover is of a half structure and is formed by oppositely locking two clamping blocks, the two clamping blocks are provided with corresponding screw holes and are locked through butt bolts.
8. A device for providing fire protection to a stay cable according to claim 1, wherein: and the vertical height from the bridge deck or the ground where the embedded pipe is located after the fireproof area section L1 and the fireproof area section L2 are combined is 5-50 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920346329.1U CN210151575U (en) | 2019-03-18 | 2019-03-18 | Device for setting fireproof protection for stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920346329.1U CN210151575U (en) | 2019-03-18 | 2019-03-18 | Device for setting fireproof protection for stay cable |
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| CN210151575U true CN210151575U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920346329.1U Active CN210151575U (en) | 2019-03-18 | 2019-03-18 | Device for setting fireproof protection for stay cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944157A (en) * | 2019-03-18 | 2019-06-28 | 江阴法尔胜住电新材料有限公司 | The device and installation method of a kind of pair of suspension cable setting flameproof protection |
-
2019
- 2019-03-18 CN CN201920346329.1U patent/CN210151575U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944157A (en) * | 2019-03-18 | 2019-06-28 | 江阴法尔胜住电新材料有限公司 | The device and installation method of a kind of pair of suspension cable setting flameproof protection |
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