CN108695798A - A kind of cable fireproof sealing component and its construction method - Google Patents

Abstract

The invention discloses a kind of cable fireproof sealing components, including upper press ring, rubber anchor ear sealing element, lower pressure ring and securing member;Annular seals are made by silica gel fire proofing in the rubber anchor ear sealing element, side wall is in " S " type under the extruding of upper press ring and lower pressure ring, rubber anchor ear sealing element " S " type male end is upheld outward to become larger, the position is set to abut sealing with the inner wall of cable cavern, the outer female end of rubber anchor ear sealing element " S " type is upheld inwardly to become larger, and the position is made to abut sealing with cable outer surface.Can effective gap between filled cable and cable cavern, realize high leakproofness, can make water that can not be flowed into from gap, water proofing property greatly improves, it is also possible to prevent mouse from baiting.Upper casting die, the assembling design of pressing member and rubber anchor ear sealing element side wall are equipped with cable suit latasuture design, so that maintenance and cable is increased dilatation construction more convenient.

Description

A cable fire-proof sealing component and its construction method

technical field

The invention relates to the technical field of electric power facilities, in particular to a cable fireproof sealing member and a construction method thereof, and in particular to a detachable cable fireproof sealing member which is convenient for cable maintenance and capacity expansion.

Background technique

During the cable laying construction process, many incoming and outgoing lines use power cables, and they must pass through special cable holes when passing through floors or partition walls. In order to facilitate installation, the general cable holes are larger than the diameter of the power cables. According to relevant regulations, when cables enter tunnels, shafts, buildings, etc., a fire blocker should be installed on the gap between the power cable and the cable hole to ensure waterproof and sundry protection, so as to prevent fire from passing through the cable hole in case of fire and crack propagation.

Traditional cable hole plugging usually uses materials such as cement, rock wool or gypsum or organic fireproof blockage materials for pipe hole plugging. The fireproof performance of cement sealing cannot meet the requirements, and the cement is hard, and the cable is always under pressure during operation; once there is a fire, the heat of the flame will cause the wall to crack and deform, smoke and heat will pass through the wall, and the flame will It will also be burned to the other side of the hole; once you want to add cables, you need to break open the brick wall, which is very troublesome and may damage the cables. Fireproof boards made of rock wool or gypsum are used to block holes. Because this material has a low expansion rate when exposed to fire, the fireproof effect is not good, and it is not environmentally friendly and harmful to humans (carcinogens). The organic fireproof mud is used for sealing, because the organic fireproof mud is easy to soften at high temperature, and it is easy to pulverize after long-term use, and its sundries prevention and waterproofing cannot meet the requirements.

Therefore, how to solve problems such as poor fire resistance and poor sealing performance of cable hole plugging, complicated plugging installation and disassembly, difficult maintenance and capacity expansion, etc., is a technical problem that those skilled in the art need to solve at present.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a cable fireproof sealing component and its construction method that are convenient for cable expansion and cable maintenance. The cable fireproof sealing component has good fire resistance and is convenient for cable expansion and expansion. , and neat and beautiful.

To achieve the above object, the present invention adopts the following technical solutions:

A cable fire blocking member, including an upper pressure ring, a rubber hoop seal, a lower pressure ring and connecting fasteners; the upper pressure ring and the lower pressure ring are made of flame-retardant materials, and the rubber hoop seal The ring-shaped seal is made of silicone flame-retardant material, which can be deformed when subjected to external force, and the side wall is "S"-shaped. The upper pressure ring is connected with the front end of the "S"-shaped convex end of the rubber hoop seal. The lower pressure ring is connected to the rear end of the "S"-shaped outer concave end of the rubber hoop seal; the connecting fastener is composed of a screw with an external thread and an insert with an internal thread, and the external thread and the internal thread matching; the upper pressure ring has an upper pressure ring installation hole, the rubber hoop seal has a seal installation hole, the lower pressure ring has a lower pressure ring installation hole, the upper pressure ring installation hole, the seal The mounting hole and the mounting hole of the lower pressure ring correspond to each other; the insert is fixedly embedded in the mounting hole of the lower pressure ring; the screw passes through the mounting hole of the upper pressure ring, the mounting hole of the seal, the mounting hole of the lower pressure ring and the insert in sequence Assembly fixed.

The design of the cable fire blocking component realizes convenient installation and disassembly:

When installing, the cable can be inserted into the upper pressure ring, the rubber hoop seal and the lower pressure ring, assembled and fixed by connecting fasteners as a cable fireproof sealing member, then put it into the cable hole, tighten the connection tightly Firmware, the deformable rubber hoop seal is squeezed by the upper pressure ring and the lower pressure ring, and the "S"-shaped outer convex end of the rubber hoop seal stretches outward, making this part and the inner wall of the cable hole Butt seal, the "S"-shaped concave end of the rubber hoop seal stretches inward and becomes larger, so that this part is abutted and sealed with the outer surface of the cable.

When disassembling, loosen the connecting fasteners, and the deformation of the rubber hoop seal returns to its original state, which can be easily removed.

The "S" type rubber hoop seal is squeezed back and forth, and the two ends are deformed in two directions, which can effectively fill the gap between the cable and the cable hole, achieve high sealing performance, and prevent water from flowing in from the gap. , The water resistance is greatly improved, and at the same time, it can also prevent mice from biting.

When a fire breaks out, the flame is blocked back and spreads in the opposite direction under the blocking of the upper pressure ring and the lower pressure ring, so as to prevent the flame from passing through the gap between the cable fireproof sealing member and the cable hole and the gap between the cable fireproof sealing member and the cable. The gap enters to prevent the cable behind the cable fire blocking member from being burned, so that the fire performance is greatly improved.

Further, there is a positioning piece at the installation hole of the contact surface between the upper pressure ring, the lower pressure ring and the rubber hoop seal, so as to realize rapid assembly of components.

Further, the flame retardant material is one of ceramics and ABS flame retardant materials.

Further, the flame retardant material and the silica gel flame retardant material are halogen-free flame retardant materials.

Further, the upper pressure ring is composed of a plurality of upper pressure pieces, the upper pressure piece is fan-shaped, and the two ends of the upper pressure piece have upper pressure ring installation holes; the lower pressure ring is made of the same structure as the upper pressure ring. It is composed of a certain number of pressing parts, the pressing parts are fan-shaped, and the pressing parts are provided with mounting holes for the pressing rings at both ends.

Further, the upper pressing ring is composed of two semi-circular upper pressing parts; the lower pressing ring is composed of two semi-circular lower pressing parts.

Further, the two ends and the middle part of the upper pressing part have upper pressing ring installation holes, and the two ends and the middle part of the lower pressing part have lower pressing ring installation holes.

The design of multiple upper pressing parts to form the upper pressing ring and multiple lower pressing parts to form the lower pressing ring can reduce the inconvenience of passing cables into the upper pressing ring and the lower pressing ring before installation. For example, a plurality of upper pressure parts are connected back and forth in turn, and one upper pressure ring mounting hole is left unconnected, and the cable can be inserted into the gap and then connected to the last upper pressure ring mounting hole, which is more convenient and quick to install.

Further, the side wall of the rubber hoop seal is provided with a side seam of the cable set. The rubber collar seal is deformable so that the gap is widened from the side seam of the cable set and the cable is inserted through it. This design does not require the cable to penetrate the rubber hoop seal from the front end, and does not need to destroy the existing installation, which is convenient for the maintenance of the cable fire sealing member and the cable, and the expansion and expansion of the cable, which is more convenient and quick.

Further, the "S"-shaped outer convex end of the rubber hoop seal is wrapped with a fireproof tape.

Further, the inside of the rubber hoop seal also includes a hollow rubber inner seal made of flame-retardant material with oblique openings. When the side wall of the rubber inner seal is squeezed, the hollow hole diameter shrinks and hugs the cable tightly. .

When the gap between the cable and the cable hole is too large, placing a rubber inner seal inside the cable fireproof sealing member can effectively improve the sealing performance of the sealing member.

Further, the rubber inner seal is a hollow frustum with oblique openings.

Further, the upper pressure ring also includes a limiting member, which effectively prevents the cable fire blocking member from penetrating into the cable hole when it is installed.

Another object of the present invention is to provide a construction method for the above-mentioned cable fire blocking member. The installation steps are as follows: put the cable in the upper pressure ring, the rubber hoop seal, and the lower pressure ring, and install the screws through the upper pressure ring in turn. hole, seal installation hole, lower pressure ring installation hole and the insert are assembled and fixed, and the rubber hoop seal is not deformed; it is installed in the cable hole as a whole, and the screw is tightened, and the deformable rubber hoop seal is on the upper Under the extrusion of the pressure ring and the lower pressure ring, the "S"-shaped convex end of the rubber hoop seal stretches outwards and becomes larger, so that this part contacts and seals with the inner wall of the cable hole, and the "S" shape of the rubber hoop seal The outer concave end stretches inwardly to make the part contact and seal with the outer surface of the cable; the maintenance or capacity increase steps are: loosen the screw to restore the rubber hoop seal to a non-deformed state, and take out the cable fire seal from the cable hole After repairing or increasing the capacity of the cable, reinstall the seal.

Furthermore, when tightening the screws, one screw is partially screwed in first, and then the diagonal screw is screwed in to maintain balance, and then the other screws are screwed in diagonally. After all the screws are processed, repeat the above steps until all screws are tightened.

Compared with prior art, the beneficial effect of the present invention is:

The cable fireproof sealing member designed by the present invention is detachable, which is convenient for equipment maintenance and cable expansion construction, avoids damage to the fireproof sealing during capacity expansion, reduces waste of materials, and shortens construction time at the same time.

The cable fireproof sealing member designed by the invention has very good sealing performance, realizes the fireproof and waterproof functions, and simultaneously has the function of preventing rats from biting.

The cable fireproof sealing member designed by the invention has neat and beautiful visual effects.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the explosion diagram of structure of the present invention;

Fig. 3 is a structural schematic diagram of the pressing piece on the semi-circular ring;

Fig. 4 is a schematic diagram of the structure of the semi-circular pressing part;

Fig. 5 is a schematic structural view of a rubber hoop seal with a side seam of a cable set: a) perspective view; b) top view; c) J-J sectional view;

Figure 6 is a schematic structural view of the rubber inner seal: a) perspective view; b) top view; c) J-J sectional view;

In the figure: 1. Upper pressure ring; 2. Rubber hoop seal; 3. Lower pressure ring; 4. Connecting fastener; 5. Rubber inner seal; 11. Mounting hole of upper pressure ring; 12. Upper pressure part ;13. Limiting piece; 21. Mounting hole for seal; 22. "S" type convex end; 23. "S" type concave end; 24. Cable suit side seam; 31. Lower pressure ring mounting hole; 32 , Press down piece; 41, screw; 42, insert.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

As shown in Figures 1 to 6: a cable fire blocking member, including an upper pressure ring 1, a rubber hoop seal 2, a lower pressure ring 3, connecting fasteners 4 and 5 rubber inner seals; the upper pressure The ring and the lower pressure ring are made of ABS flame-retardant material. The rubber hoop seal is made of halogen-free silicone flame-retardant material. type, the upper pressure ring is connected to the front end of the "S"-shaped convex end 22 of the rubber hoop seal, and the lower pressure ring is connected to the rear end of the "S"-shaped concave end 23 of the rubber hoop seal. There is a side seam 24 of the cable set on the wall, and a fireproof tape is wrapped around the "S"-shaped convex end; the connecting fastener is composed of a screw 41 with an external thread and an insert 42 with an internal thread, and the external thread and The internal thread is matched; the upper pressure ring has a limit piece 13, which is composed of two ring upper pressure pieces 12. The two ends and the middle of the upper pressure piece have an upper pressure ring installation hole 11, and the lower end has a positioning ring , the rubber hoop seal has a seal installation hole 21, and the lower pressure ring is composed of two annular lower pressure parts 32, the two ends and the middle of the lower pressure part have a lower pressure ring installation hole 31, and the upper end is also There is a positioning ring, the installation hole of the upper pressure ring, the installation hole of the seal and the installation hole of the lower pressure ring are connected correspondingly, and the positioning rings of the upper pressure ring and the lower pressure ring can be inserted into the installation hole of the seal; the insert is fixed Embedded in the mounting hole of the lower pressure ring; the screws are sequentially passed through the mounting hole of the upper pressure ring, the mounting hole of the seal, the mounting hole of the lower pressure ring and assembled and fixed with the insert.

The "S" type rubber hoop seal is squeezed back and forth, and the two ends are deformed in two directions, which can effectively fill the gap between the cable and the cable hole, achieve high sealing performance, and prevent water from flowing in from the gap. , The water resistance is greatly improved, and at the same time, it can also prevent mice from biting.

When a fire breaks out, the flame is blocked back and spreads in the opposite direction under the blocking of the upper pressure ring and the lower pressure ring, so as to prevent the flame from passing through the gap between the cable fireproof sealing member and the cable hole and the gap between the cable fireproof sealing member and the cable. The gap enters to prevent the cable behind the cable fire blocking member from being burned, so that the fire performance is greatly improved.

The design of the cable fireproof sealing component realizes convenient installation and disassembly, which is beneficial to cable maintenance and capacity expansion:

Hereinafter, each group of corresponding upper pressure ring installation holes, seal installation holes and lower pressure ring installation holes are collectively referred to as installation holes.

When installing, first pass the screws through the mounting holes of the upper pressure ring, the rubber hoop seal, the lower pressure ring and the insert fixed in the lower pressure ring in sequence. Select a group of mounting holes without installing screws; the rubber hoop seal can be deformed, so the side seam of the cable set can be used to widen the gap, and at the same time, multiple upper pressure parts form the upper pressure ring and multiple lower pressure parts The lower pressure ring will also be deformed accordingly, forming a gap, and the cable can be loaded into the cable fireproof sealing member from the gap; after wrapping the "S"-shaped outer convex end of the rubber hoop seal with fireproof tape, the unused Insert the screw into the mounting hole of the mounting screw, gradually tighten the screw diagonally, the deformable rubber hoop seal is squeezed by the upper pressure ring and the lower pressure ring, and the "S" shape of the rubber hoop seal protrudes outward. The outer stretch becomes larger, so that this part abuts and seals with the inner wall of the cable hole, and the "S"-shaped outer concave end of the rubber hoop seal stretches inward and becomes larger, so that this part abuts and seals with the outer surface of the cable.

When the gap between the cable and the cable hole is too large, a hollow rubber inner seal with an oblique opening made of flame-retardant material is placed inside the cable fireproof sealing member. The rubber inner seal is a hollow circular frustum with an oblique opening. When the side wall is subjected to extrusion force, the hollow aperture shrinks and hugs the cable tightly, which can effectively improve the sealing performance of the blocking member.

When disassembling, loosen the connecting fasteners, and the deformation of the rubber hoop seal will return to the original state, and the cable fire-proof sealing member can be easily taken out from the cable hole; the screws in a set of mounting holes on both sides of the side seam of the Panasonic cable suit, external force Widen the side seam of the cable set, take out the cable fireproof sealing member or take out the cable to be maintained, and carry out cable maintenance or capacity expansion construction.

After treatment, reinstall the seal.

Example 2

A cable fireproof sealing component, including an upper pressure ring, a rubber hoop seal on the "S"-shaped side wall, a lower pressure ring and connecting fasteners; the upper pressure ring is an integral ring with an upper pressure ring installation The upper pressure ring is connected to the front end of the "S"-shaped convex end of the rubber hoop seal; the lower pressure ring is an integral ring with a mounting hole for the lower pressure ring, and the lower pressure ring is sealed with the rubber hoop The rear end of the "S"-shaped concave end of the piece is connected; the connecting fastener is composed of a screw with an external thread and an insert with an internal thread, and the external thread matches the internal thread; the rubber hoop seal It has a seal installation hole, and the upper pressure ring installation hole, the seal installation hole and the lower pressure ring installation hole are arranged in alignment and communicate with each other; the insert is fixedly embedded in the lower pressure ring installation hole; the screw Pass through the mounting hole of the upper pressure ring, the mounting hole of the seal, and the mounting hole of the lower pressure ring in sequence to assemble and fix the insert.

The upper pressure ring and the lower pressure ring are made of ceramic materials, and the rubber hoop seal is made of a silicone flame-retardant material, which can be deformed when subjected to external force.

During construction, put the cable through the upper pressure ring, the rubber hoop seal and the lower pressure ring in sequence. After assembling the cable fireproof sealing member, put it into the cable hole, first partially screw in a screw, and then put the diagonal Screw in the screws, maintain balance, and then screw in other screws in a diagonal way; after all the screws are processed, repeat the above steps until all the screws are tightened or the cable fireproof sealing member effectively seals the gap between the cable and the cable hole.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. a kind of cable fireproof sealing component, which is characterized in that including upper press ring (1), rubber anchor ear sealing element (2), lower pressure ring (3) and securing member (4);The upper press ring, lower pressure ring are made of fire proofing, and the rubber anchor ear sealing element is hindered by silica gel Annular seals are made in combustible material, can be deformed upon by when external force, and side wall is in " S " type, and the upper press ring and rubber anchor ear are close The front end of sealing " S " type male end (22) is connected, the rear end of the lower pressure ring and the outer female end (23) of rubber anchor ear sealing element " S " type It is connected;The securing member with externally threaded screw (41) and the female inserts (42) of tool by forming, the outer spiral shell Line matches with internal thread;There is the upper press ring upper press ring mounting hole (11), the rubber anchor ear sealing element to have sealing element Mounting hole (21), the lower pressure ring have lower pressure ring mounting hole (31), the upper press ring mounting hole, sealing element mounting hole and pushing Ring mounting hole correspondence communicates;The inserts fixation is inlaid in lower pressure ring mounting hole;The screw sequentially passes through upper press ring installation Hole, sealing element mounting hole, lower pressure ring mounting hole and inserts assembling are fixed.

2. cable fireproof sealing component according to claim 1, which is characterized in that the upper press ring is by multiple upper casting dies (12) it forms, the upper casting die is fan annular, and the upper casting die both ends have upper press ring mounting hole;The lower pressure ring by with upper pressure The pressing member (32) of the identical quantity of ring forms, and the pressing member is fan annular, and the pressing member both ends have lower pressure ring mounting hole.

3. cable fireproof sealing component according to claim 2, which is characterized in that the upper press ring is by 2 semicircular rings Casting die forms;The lower pressure ring is made of 2 semicircular ring pressing members.

4. cable fireproof sealing component according to claim 3, which is characterized in that the both ends of the upper casting die and middle part There is upper press ring mounting hole, the both ends of the pressing member and intermediate position to have lower pressure ring mounting hole for position.

5. cable fireproof sealing component according to any one of claims 1-4, which is characterized in that the rubber anchor ear is close Cable suit latasuture (24) is provided on sealing side wall.

6. cable fireproof sealing component according to claim 5, which is characterized in that rubber anchor ear sealing element " S " type Male end is wound with fire-proof belt.

7. according to the cable fireproof sealing component described in claim 1-6 any one claims, which is characterized in that the rubber Further include the rubber inner seal liner (5) for having hollow diagonal cut joint made of fire proofing, the rubber inside glue anchor ear sealing element When glue inner seal liner side wall is squeezed power, hollow aperture, which reduces, holds cable tightly.

8. cable fireproof sealing component according to claim 7, which is characterized in that the rubber inner seal liner is hollow oblique The round estrade of opening.

9. according to the cable fireproof sealing component described in any one claim described in claim 1-8, which is characterized in that institute It further includes finite place piece (13) to state on upper press ring.

10. the cable fireproof sealing component construction method described in above-mentioned any one claim, which is characterized in that installation steps For:By cable joint-box in upper press ring, rubber anchor ear sealing element, lower pressure ring, screw sequentially passes through upper press ring mounting hole, sealing element Mounting hole, lower pressure ring mounting hole and inserts assembling are fixed, and the rubber anchor ear sealing element is not deformed;Its integral installation is entered into cable In hole, screw is tightened, deformable rubber anchor ear sealing element is under the extruding of upper press ring and lower pressure ring, rubber anchor ear sealing element " S " type male end is upheld outward to become larger, and the position is made to abut sealing, rubber anchor ear sealing element " S " with the inner wall of cable cavern The outer female end of type is upheld inwardly to become larger, and the position is made to abut sealing with cable outer surface;Repair or increase-volume step are:Unscrew spiral shell Silk makes rubber anchor ear sealing element restore non-deformed state, cable fireproof sealing component is taken out from cable cavern, is carried out to cable After repair or increase-volume, sealing is reinstalled.