WO2023011598A1

WO2023011598A1 - Hoop-type tee joint for cpvc fire-fighting plastic pipe system

Info

Publication number: WO2023011598A1
Application number: PCT/CN2022/110328
Authority: WO
Inventors: 周文忠; 周森洪; 唐军
Original assignee: 上海远洲管业科技股份有限公司
Priority date: 2021-08-06
Filing date: 2022-08-04
Publication date: 2023-02-09
Also published as: CN113464754A

Abstract

Disclosed is a hoop type tee joint for a CPVC fire-fighting plastic pipe system. The hoop is used for the connection of a pipe the main pipe of which is galvanized steel or another material to a CPVC fire-fighting pipe; when a CPVC pipe branch needs to be provided on the main pipe that is another material or galvanized steel, only one hole needs to be punched onto the pipe wall of the main pipe; the hoops according to the present invention are clasped onto the main pipe, and a pipe adapter on the hoop is enabled to be linked with the hole, so that multiple branches of the CPVC pipe are disposed on the main pipe, which may improve the problem that a metal mechanical tee joint must be mounted before connecting an original galvanized steel pipe or a pipe of another material to a CPVC pipe, and then a plastic joint one end of which is a metal male-thread and the other end of which is CPVC material is screwed on to be able to complete the conversion of pipes of different materials to a CPVC pipe. The present invention completely changes the structural arrangement and connection method of a metal mechanical tee joint on a main water pipe in a conventional fire-fighting system, and promotes the popularization and application of CPVC material plastic pipes to gradually replace original galvanized steel pipes. The present invention may obviously alleviate labor intensity and reduce material costs, and has the advantages of saving materials, saving space, easy mounting and good sealing performance.

Description

A clamp-type tee for CPVC fire-fighting plastic pipe system

technical field

The invention relates to the technical field of fire-fighting water supply systems, the connection between CPVC fire-fighting plastic pipes and galvanized steel pipe pipelines when branching or switching, especially a clamp that can be used for direct conversion between CPVC fire-fighting plastic pipes and galvanized steel pipes or other material pipes type tee.

Background technique

The fire sprinkler system pipes and joints in the prior art are mostly designed with galvanized steel pipes. The problem is that galvanized steel pipes are very easy to corrode, and the galvanized layer is prone to fall off and rust. Due to the serious corrosion of the pipeline, the sprinkler head is blocked by rust when a fire breaks out, which makes it impossible to spray water in time to put out the fire, thus causing a large fire; due to the limitation of the production process of the galvanized steel pipe, when the tee in the prior art is connected The steel pipe must be cut off, and the tee is connected by threading the two connecting ends of the steel pipe, or opening a hole on the main pipe to install the metal mechanical tee, and then adding a conversion joint of two materials, otherwise it cannot be installed. There is a large workload, high cost, and damage or burrs on the threaded sealing surface will lead to the failure of the seal during the construction process, increase labor costs, inconvenience installation and maintenance, and there are potential safety hazards that are easy to corrode and leak.

In many advanced countries in the world, CPVC fire-fighting plastic pipes replaced metal pipes 30 years ago, which greatly reduced the cost. Since CPVC fire-fighting plastic pipes have clear specification requirements, some main pipes can only use metal pipes. , so when the metal pipe is connected to the CPVC, it is still necessary to open a hole on the metal pipe and install a metal mechanical tee and an outer wire conversion joint, which increases the cost and is inconvenient to install. Due to the long-term use practice, it is proved that the plastic fire-fighting pipe made of CPVC will gradually replace the original galvanized steel pipe connection, and the installation and use capacity of the urban fire-fighting pipe will be upgraded to improve the fire-fighting ability. In order to fundamentally solve the defect that galvanized steel pipes are easy to rust, it has become a trend to use CPVC fire-fighting plastic pipes to replace traditional galvanized steel pipes in fire-fighting automatic sprinkler systems. CPVC fire-fighting plastic pipes use special glue when connecting pipes and fittings To implement plug-in cold-melt connection, for this reason, it is very necessary to install the structural setting and connection method of the metal mechanical tee when the pipeline line on the main water pipe in the traditional fire protection system needs to be branched.

Contents of the invention

The object of the present invention is to provide a clamp type tee for CPVC fire-fighting plastic piping system in view of the deficiencies of the prior art. The clamp is used for the connection between the main pipe made of galvanized steel pipe or other materials and the CPVC fire-fighting pipeline; specifically, a connecting pipe connected with the semi-cylinder is arranged on the shell wall of the clamp upper cover, and the connecting pipe and the inner wall of the shell are connected. Convex grooves and annular sealing grooves are arranged on intersecting annular intersecting lines. When it is necessary to set pipeline branches on the main pipe made of other materials or the main pipe made of galvanized steel pipe, it is only necessary to make a hole on the pipe wall of the main pipe, and the clamp of the present invention is entwined on the main pipe, and the connecting pipe of the upper cover of the clamp The corrugation is stuck in the hole, and the hole is connected with the hole through the connecting pipe, which completes the direct conversion of the CPVC fire pipe in the main pipeline to the branch of the steel pipe line or other material lines. In order to solve the sealing problem, the present invention sets a sealing ring between the annular sealing groove of the upper cover of the clamp and the periphery of the hole of the main pipe. The invention completely changes the structural setting and connection method of the mechanical tee on the main water pipe in the traditional fire-fighting system, and promotes the popularization and application of plastic pipes made of CPVC to gradually replace the original galvanized steel pipes in the fire-fighting system. It can significantly reduce the use of joints, reduce labor intensity and reduce material costs, and has the advantages of material saving, space saving, easy installation and good sealing performance.

The concrete technical scheme that realizes the object of the invention is:

A clamp-type tee for CPVC fire-fighting plastic piping system, which is characterized by clamp upper cover, clamp lower cover, sealing ring, metal lining ring and bolt nut;

The upper cover of the clamp is a semi-cylindrical housing member, and the housing wall is provided with a connecting pipe connected with the semi-cylindrical cylinder. The intersecting annular intersecting lines are provided with convex corrugations and annular sealing grooves, and the first lug blocks are symmetrically provided on both sides of the outer wall of the shell, and the first lug blocks are provided with first bolt holes;

The lower cover of the hoop is a semi-cylindrical housing part, and the outer wall of the housing is symmetrically provided with second lug blocks on both sides, and the second lug blocks are provided with second bolt holes corresponding to the first bolt holes;

The sealing ring is arranged in the annular sealing groove of the upper cover of the clamp;

The metal lining is four pieces, which are respectively embedded in the first bolt hole of the upper cover of the clamp and the second bolt hole of the lower cover of the clamp;

There are two sets of bolts and nuts;

The clamp upper cover and the clamp lower cover are fastened correspondingly, and the bolts and nuts fasten the clamp upper cover and the clamp lower cover through the metal lining rings of the first bolt hole and the second bolt hole.

The upper cover of the clamp is provided with a cap in the pipe of the connecting pipe, and the inner wall of the pipe is provided with a cone angle α in the shape of a bell mouth of 2-4°.

A positioning groove is provided in the radial direction of the inner annular sealing groove of the connecting pipe.

A radial protrusion is provided on the outer side of the sealing ring.

The present invention adopts the upper cover of the clamp and the lower cover of the clamp to form a pair of clamps that are entwined with galvanized steel pipes or other material pipes. When the pipe branch is set on the main pipe, it is only necessary to punch a hole on the pipe wall of the main pipe, and the clamp of the present invention is embraced on the main pipe, and the connecting pipe is connected with the hole, and the conversion of setting the CPVC pipe on the main pipe is completed. In order to solve the sealing problem, the present invention sets a sealing ring between the annular sealing groove of the upper cover of the clamp and the periphery of the hole of the main pipe. The invention completely changes the structural setting and connection method of the mechanical tee on the main water pipe in the traditional fire protection system, and promotes the popularization and application of plastic pipes made of CPVC instead of the original galvanized steel pipes. The invention can significantly reduce labor intensity and The material cost is reduced, and the utility model has the advantages of material saving, space saving, easy installation and good sealing performance.

The present invention has the following technical characteristics:

a) Most of the traditional fire-fighting pipelines are designed with galvanized steel pipes. Metal tees or metal mechanical tees are used when the pipelines are branched, and the pipes are threaded. When installing, wires must be set on the steel pipes, or more metal joints should be added. Conversion will result in labor-intensive installation and increased cost. The screw connection is difficult to seal and there is a risk of water leakage. The present invention completely changes the structural setting and connection method of the branches of the pipeline on the main water pipe in the traditional fire protection system.

b), with the wide application of CPVC fire-fighting pipelines, when the main pipe is a galvanized steel pipe and needs to be connected with CPVC fire-fighting plastic pipes, only a hole needs to be made on the pipe wall of the main pipe, and the clamp of the present invention is entwined on the main pipe, And the connecting pipe on the clamp is connected with the hole. The hole in the middle of the clamp is made of CPVC material. After installation, it can be directly inserted into the CPVC fire-fighting pipeline to complete the branch of the pipeline line on the main pipe. The present invention can significantly reduce labor intensity and reduce The cost of materials has the advantages of material saving, space saving, easy installation and good sealing performance.

c), the present invention is provided with a sealing ring in the annular sealing groove of the upper cover of the clamp, when the clamp of the present invention is entwined on the main pipe, the sealing is completed between the sealing ring in the annular sealing groove and the periphery of the hole of the plastic main pipe, Not only is the assembly of the sealing ring simple, but it also has the advantage of good sealing performance.

Description of drawings

Fig. 1 is the structural representation of invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a structural schematic diagram of the upper cover of the clamp of the invention;

Fig. 4 is the bottom view of Fig. 3;

Fig. 5 is a side view of Fig. 3;

Fig. 6 is a structural schematic diagram of the sealing ring of the invention;

FIG. 7 is a top view of FIG. 6 .

Detailed ways

Referring to Fig. 1 and Fig. 2, the present invention includes a clamp upper cover 1, a clamp lower cover 2, a sealing ring 3, a metal lining 4 and a bolt nut 5.

Referring to Fig. 1, Fig. 3, Fig. 4, Fig. 5, the upper cover 1 of the hoop is a semi-cylindrical shell member, and its shell wall is provided with a connecting pipe 13 connected with the semi-cylindrical, and the axis of the connecting pipe 13 is in line with the semicircle The axes of the cylinders are perpendicular to each other and intersect each other. There are ribs 15 and annular sealing grooves 16 on the annular intersecting line where one port of the connecting pipe 13 intersects with the inner wall of the housing. The outer wall of the housing is symmetrically provided with first lug blocks 11. The first lug block 11 is provided with a first bolt hole 12 .

Referring to Fig. 1 and Fig. 2, the lower cover 2 of the clamp is a semi-cylindrical housing part, and the outer wall of the housing is symmetrically provided with second lug blocks 21 on both sides, and the second lug block 21 is provided with the first lug block. The second bolt hole 22 corresponds to the bolt hole 12 .

Referring to FIG. 1 , the metal bushings 4 are four pieces, which are respectively embedded in the first bolt hole 12 of the clamp upper cover 1 and the second bolt hole 22 of the clamp lower cover 2 .

Referring to FIG. 1 , the sealing ring 3 is arranged in the annular sealing groove 16 of the clamp upper cover 1 .

Referring to Fig. 1, there are two sets of bolts and nuts 5.

Referring to Fig. 1, the clamp upper cover 1 and the clamp lower cover 2 are correspondingly fastened, and the bolt nut 5 passes through the metal lining 4 of the first bolt hole 12 and the second bolt hole 22 to connect the clamp upper cover 1 and the clamp Hoop lower cover 2 is fastened.

Referring to Fig. 1 , the clamp upper cover 1 is provided with a platform 14 inside the pipe of the connecting pipe 13, and the inner wall of the pipe is provided with a cone angle α in the shape of a bell mouth of 2-4°.

Referring to FIG. 1 and FIG. 4 , a positioning groove 17 is provided in the radial direction of the annular sealing groove 16 in the connecting pipe 13 .

Referring to FIG. 1 , FIG. 6 , and FIG. 7 , protrusions 31 are provided in the radial direction on the outer side of the sealing ring 3 .

Referring to Fig. 1 and Fig. 2, in order to improve the intensity of the first bolt hole 12 of the upper cover 1 of the clamp and the second bolt hole 22 of the lower cover 2 of the clamp, the present invention provides the first bolt hole 12 and the second bolt hole 22 Metal bushings 4 are inlaid respectively, and the metal rings 4 are formed by injection molding with the hoop upper cover 1 and the hoop lower cover 2 respectively.

Referring to Fig. 1 and Fig. 2, in order to facilitate the connection between the connecting pipe 13 of the clamp upper cover 1 of the present invention and other pipes or fittings, the present invention sets a 2-4° bell-shaped cone on the inner wall of other pipes or fittings. The angle α is beneficial to the plugging of the present invention with other pipes or fittings. The present invention provides a platform 14 in the connecting pipe 13, which not only facilitates the limit of the plugging of the present invention and pipes during installation, but also blocks the overflow of cold melt glue water.

Referring to Fig. 1 and Fig. 3, when the present invention is provided with a pipeline line branch or conversion connection on the fire-fighting main pipe, it is only necessary to make a hole on the pipe wall of the main pipe, and the clamp of the present invention is embracing on the main pipe, and the clamp is covered 1 connects with the hole, which means that the branch connection of the CPVC pipeline line is set on the fire supervisor. In order to ensure that the connecting pipe 13 of the clamp upper cover 1 is accurately engaged with the hole on the plastic pipe, the present invention is provided with a corrugation 15 on the annular intersecting line where one port of the connecting pipe 13 intersects with the inner wall of the housing, and through the protruding corrugation 15 and the hole The clamping connection ensures that the connecting pipe of the clamp upper cover 1 is accurately engaged and connected with the hole on the plastic pipe.

Referring to Fig. 1, Fig. 4, Fig. 6, Fig. 7, the sealing ring 3 of the present invention is a non-planar sealing ring, and the bus bar of the sealing ring 3 is the intersecting line of two intersecting columns. In order to ensure the accurate installation of the sealing ring 3, In the present invention, a positioning groove 17 is provided in the radial direction of the annular sealing groove 16 in the connecting pipe 13, and a protrusion 31 is provided in the radial direction outside the sealing ring 3. When assembling the sealing ring 3, as long as the protrusion 31 of the sealing ring 3 is connected Align the positioning groove 17 in 13, and pack the sealing ring 3 in the annular sealing groove 16 and get final product.

Claims

A clamp type tee for CPVC fire-fighting plastic piping system, characterized in that it includes a clamp upper cover (1), a clamp lower cover (2), a sealing ring (3), a metal lining (4) And bolts and nuts (5);

The hoop upper cover (1) is a semi-cylindrical housing member, and the housing wall is provided with a connecting pipe (13) that penetrates the semi-cylindrical, and the axis of the connecting pipe (13) is perpendicular to and intersects with the axis of the semi-cylindrical , a port of the connecting pipe (13) intersects with the inner wall of the shell on the annular intersecting line that is provided with a corrugation (15) and an annular sealing groove (16), and the outer wall of the shell is symmetrically provided with first lug blocks (11) , the first lug block (11) is provided with a first bolt hole (12);

The hoop lower cover (2) is a semi-cylindrical housing part, and the outer wall of the housing is symmetrically provided with second lug blocks (21), and the second lug blocks (21) are provided with the first bolts. The second bolt hole (22) corresponding to the hole (12);

The sealing ring (3) is arranged in the annular sealing groove (16) of the clamp upper cover (1);

The metal bushings (4) are four pieces, which are respectively embedded in the first bolt hole (12) of the clamp upper cover (1) and the second bolt hole (22) of the clamp lower cover (2);

There are two sets of bolts and nuts (5);

The clamp upper cover (1) is correspondingly fastened with the clamp lower cover (2), and the bolt nut (5) passes through the metal lining (4) of the first bolt hole (12) and the second bolt hole (22) Tighten the upper clamp cover (1) and the lower clamp cover (2).
A clamp-type tee for CPVC fire-fighting plastic piping system according to claim 1, characterized in that, a cap (14) is provided in the tube of the upper cover (1) of the clamp (13) , The inner wall of the tube is provided with a cone angle α in the shape of a bell mouth of 2 to 4°.
A clamp type tee for CPVC fire-fighting plastic piping system according to claim 1, characterized in that, the radial direction of the inner annular sealing groove (16) of the connecting pipe (13) is provided with a positioning groove (17) .
A clamp-type tee for CPVC fire-fighting plastic piping system according to claim 1, characterized in that, the outer radial direction of the sealing ring (3) is provided with a protrusion (31)