WO2023000911A1 - Plastic socket-and-spigot type sprinkler head for fire-fighting automatic sprinkler system - Google Patents

Abstract

A plastic socket-and-spigot type sprinkler head for a fire-fighting automatic sprinkler system. In the sprinkler head (1), a cylindrical interface is arranged at the tail part of a sprinkler head housing, a connecting pipe (2) of which one end is a meshing end and the other end is a socket end is designed, and the interface of the sprinkler head (1) is connected to the meshing end of the connecting pipe (2) by means of injection molding. In use, the socket end of the connecting pipe (2) is connected to a fire-fighting pipe in a plug-in glue cold-melting mode, so that connection between the sprinkler head and the fire-fighting pipe is completed. By means of the sprinkler head, the current situation that traditional sprinkler heads are threadedly connected to galvanized steel pipes is changed; in the fire-fighting automatic sprinkler system, a plastic pipe made of PVC-C materials is promoted to gradually replace an original galvanized steel pipe to be popularized and applied, labor intensity and material costs can be significantly reduced, and the sprinkler head has the advantages of being material-saving, space-saving, easy to install and good in sealing performance.

Description

A plastic socket type sprinkler head for fire automatic sprinkler system technical field

The invention relates to the technical field of fire-fighting water supply systems, and is used for assembling a sprinkler head and a PVC-C fire-fighting plastic pipe, in particular to a plastic socket-type sprinkler head used for a fire-fighting automatic sprinkler system.

Background technique

The fire-fighting sprinkler system pipelines and joints of the prior art are all designed with galvanized steel pipes. The problem is that the galvanized steel pipes are very easy to corrode, and the galvanized layer is prone to fall off and rust. Many fire-fighting pipelines are due to Corrosion is severe, and when a fire breaks out, the sprinkler head is blocked by rust, which leads to the inability to spray water in time to put out the fire, thus causing a large fire; due to the limitation of the production process of galvanized steel pipes, the prior art sprinkler joints must be connected to the steel pipes. There is an internal thread conversion joint connected to it. The connection between the steel pipe and the sprinkler joint needs to be connected with a thread, otherwise it cannot be installed. Damage or burrs on the thread sealing surface will cause the seal to fail during the construction process, increase labor costs, and be inconvenient for installation and maintenance. Maintenance, there are potential safety hazards that are easy to corrode and easy to leak.

The Ministry of Housing and Urban-Rural Development of the People's Republic of China and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China jointly released the Design Specifications for the Automatic Sprinkler System of Facilities on January 1, 2018 on May 27, 2017, PVC-C plastic pipes Gradually replace the connection of the original galvanized steel pipes, and upgrade the installation and use capacity of urban fire protection pipelines to improve the ability of fire fighting and extinguishing. In order to fundamentally solve the defect that galvanized steel pipes are easy to rust, it has become a trend to replace galvanized steel pipes with PVC-C fire-fighting plastic pipes. When PVC-C fire-fighting plastic pipes are connected to pipes or pipes to devices, special glue is used to implement Plug-in cold fusion connection, for this reason, it is very necessary to change the interface of the prior art sprinkler head and the connection mode between the sprinkler head and the fire-fighting pipeline.

Contents of the invention

The object of the present invention is to provide a plastic socket type sprinkler head for automatic fire sprinkler system in view of the deficiencies in the prior art. , design a connecting pipe with one end as the engaging end and the other end as the socket end, and connect the interface of the sprinkler head and the engaging end of the pipe by injection molding. The connection between the sprinkler head and the fire-fighting pipeline is completed. This invention completely changes the current situation of the traditional sprinkler head and galvanized steel pipe threaded connection. In the fire-fighting automatic sprinkler system, the plastic pipe made of PVC-C is gradually By replacing the popular application of the original galvanized steel pipe, the present invention can significantly reduce labor intensity and material cost, 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 plastic socket-type sprinkler head for automatic fire sprinkler systems, which features a sprinkler head, a connecting pipe and a sealing ring;

The tail of the shower head housing is provided with a cylindrical interface, and a step is provided between the outer wall of the interface and the housing, and at least three annular grooves are sequentially arranged on the outer wall of the interface, and the top and bottom of the annular grooves are both rounded corners;

The connecting pipe is a tubular part, the axis of the connecting pipe is a straight line or a bending line formed by a combination of a straight line and a curve, one end of the connecting pipe is an engaging end, and the other end is a socket end, and the inner wall of the engaging end is provided with several The ring flange and the first cap, the inner wall of the tube at the socket end is provided with a cone angle α in the shape of a bell mouth of 2 to 4° and the second cap;

There are two sealing rings, and the sealing rings are respectively arranged in two annular grooves on the interface;

The interface of the shower head is injection-molded connected to the engaging end of the connecting pipe, and the several annular grooves of the interface mesh with the several annular flanges of the engaging end, wherein the sealing ring is located between the annular groove and the annular flange; and the interface The step of the joint is in contact with the end face of the engagement end, and the nozzle of the interface is in contact with the first platform of the engagement end.

The surfaces of the shower head shell and the outer wall of the interface are electroplated.

In the present invention, a cylindrical interface is provided at the tail of the shower head shell, and a connecting pipe with one end as the engaging end and the other end as the socket end is designed, and the interface of the spraying head and the engaging end of the connecting pipe are connected by injection molding. , connect the socket end of the connecting pipe with the fire-fighting pipeline in a plug-in glue cold-melt connection to complete the connection between the sprinkler head and the fire-fighting pipeline. In the automatic sprinkler system, the popularization and application of PVC-C plastic pipes gradually replacing the original galvanized steel pipes is promoted. The invention can significantly reduce labor intensity and material costs, and has the advantages of material saving, space saving, easy installation and The advantages of good sealing performance.

The present invention has the following technical characteristics:

The existing sprinkler head is designed as an all-metal threaded connection. When used, it must be used with an internal thread conversion joint. Especially in the currently popularized plastic fire-fighting piping system, the connection of the spray joint still needs an internal thread joint. In connection with it, the present invention adopts the structure of the sprinkler head and the connecting pipe, completely changes the traditional threaded connection method, and connects the socket end of the connecting pipe with the fire-fighting pipeline in a plug-in glue cold-melt connection.

Description of drawings

Fig. 1 is the structural representation of invention;

Fig. 2 is a partially enlarged schematic diagram of A in Fig. 1;

Fig. 3 is a schematic diagram of the use state where the axis of the invention is the bending line.

detailed description

Referring to FIG. 1 and FIG. 3 , the present invention includes a shower head 1 , a connecting pipe 2 and a sealing ring 3 .

Referring to Fig. 1 and Fig. 2, the tail of the shower head 1 housing is provided with a cylindrical interface, and a step 11 is provided between the outer wall of the interface and the housing, and at least three annular grooves 12 are arranged on the outer wall of the interface in turn. Both the top and the bottom of the annular groove 12 are provided with rounded chamfers.

Referring to Fig. 1 and Fig. 3, the connecting pipe 2 is a tubular member, the axis of the connecting pipe 2 is a straight line or a bending line formed by a combination of a straight line and a curved line, one end of the connecting pipe 2 is an engaging end, and the other end is a socket end, so Several annular flanges 21 and a first platform 22 are arranged in turn on the inner wall of the pipe at the engaging end, and the inner wall of the pipe at the socket end is provided with a cone angle α and a second platform 23 in the shape of a bell mouth of 2 to 4°.

Referring to Fig. 1 and Fig. 3, the sealing ring 3 is two pieces, and the sealing ring 3 is respectively arranged in two annular grooves 12 on the interface.

Referring to Fig. 1, Fig. 2 and Fig. 3, the interface of the sprinkler head 1 is connected to the engaging end of the connecting pipe 2 by injection molding, and the several annular grooves 12 of the interface are engaged with the several annular flanges 21 of the engaging end, wherein the sealing The ring 3 is located between the annular groove 12 and the annular flange 21; and the step 11 of the interface touches the end surface of the engaging end, and the nozzle of the interface touches the first platform 22 of the engaging end.

Referring to Fig. 1 and Fig. 3, the surface of the shell of the shower head 1 and the outer wall of the interface are electroplated.

Referring to Fig. 1, Fig. 2 and Fig. 3, in order to solve the connection sealing problem between the shower head 1 and the connecting pipe 2, the present invention implements electroplating treatment on the surface of the outer wall of the shower head 1 interface; 1 The tail of the housing is provided with a cylindrical interface, and there is a step 11 between the outer wall of the interface and the housing, and several ring-shaped grooves 12 are arranged on the outer wall of the interface in turn, and two sealing rings 3 are respectively installed in one of the interfaces. Two annular grooves 12, and the interface equipped with the sealing ring 3 is set in the mold, and the interface of the sprinkler 1 and the meshing end of the connecting pipe 2 are connected by injection molding at one time. Several annular grooves 12 of the interface Engage with several annular flanges 21 at the engaging end, wherein the sealing ring 3 is injected between the annular groove 12 and the annular flange 21; and the step 11 of the interface touches the end face of the engaging end, the nozzle of the interface and the The first platform 22 touches to ensure good adhesion and sealing performance between the sprinkler head 1 and the connecting pipe 2 .

Referring to Fig. 1, Fig. 2 and Fig. 3, in order to solve the strength problem of the connection between the sprinkler head 1 and the connecting pipe 2, the present invention is provided with a cylindrical interface at the tail of the sprinkler head 1, and several annular grooves 12 are arranged on the interface , and the top and bottom of the annular groove 12 are provided with circular arc chamfers. 2 Several annular flanges 21 at the engaging end are engaged. At this time, the circular arc at the root of the annular groove 12 and the annular flange 21 can effectively avoid stress concentration, ensure the connection strength of the joint between the sprinkler head 1 and the connecting pipe 2, and prolong the life of the product. service life.

Referring to Fig. 1 and Fig. 3, when the present invention is used, in the layout process of the plastic fire-fighting piping system, the sprinkler pipe is reserved, and the socket end of the connecting pipe 2 of the present invention is inserted into the reserved sprinkler pipe, and used The special glue can be cold-melted and connected.

Referring to Fig. 1 and Fig. 3, in order to facilitate the connection between the present invention and the sprinkler pipe, the present invention sets a cone angle α of 2 to 4° in the shape of a bell mouth on the inner wall of the socket end of the connecting pipe 2, which is beneficial to the present invention and the spraying For the plugging of the head pipe, the present invention sets the second bearing platform 23 in the socket end of the connecting pipe 2, which not only facilitates the limit of the plug connection when the present invention is installed with the sprinkler pipe, but also blocks the overflow of cold melt glue water.

Referring to Fig. 1 and Fig. 3, for the convenience of adjusting the present invention's setting posture on the plastic fire-fighting pipeline sprinkler head, the axis of the connecting pipe 2 designed by the present invention is a straight line or a bending line formed by combining a straight line and a curve; its axis is Straight line, that is, the axis of the meshing end of the connecting pipe 2 and the axis of the socket end are on the same straight line; its axis is a bending line, that is, the axis of the engaging end of the connecting pipe 2 and the axis of the socket end intersect at 90° to 135°, and the middle part is transitioned by a curve connect.

Claims (2)

A plastic socket-type sprinkler head for automatic fire sprinkler systems, characterized in that it includes a sprinkler head (1), a connecting pipe (2) and a sealing ring (3); The tail of the shower head (1) housing is provided with a cylindrical interface, and a step (11) is provided between the outer wall of the interface and the housing, and at least three annular grooves (12) are arranged on the outer wall of the interface successively, so that The top and the bottom of the annular groove (12) are provided with rounded chamfers; The connecting pipe (2) is a tubular part, and the axis of the connecting pipe (2) is a straight line or a bending line formed by a combination of a straight line and a curve. One end of the connecting pipe (2) is an engaging end, and the other end is a socket end. Several ring-shaped flanges (21) and a first platform (22) are provided in turn on the inner wall of the pipe at the engaging end, and the inner wall of the pipe at the socket end is provided with a cone angle α and a second platform (23 ); The sealing ring (3) is two pieces, and the sealing ring (3) is respectively arranged in two of the annular grooves (12) on the interface; The interface of the sprinkler head (1) is injection-molded connected to the engaging end of the connecting pipe (2), and several annular grooves (12) of the interface engage with several annular flanges (21) of the engaging end, wherein the sealing ring ( 3) Located between the annular groove (12) and the annular flange (21); and the step (11) of the interface touches the end surface of the engaging end, and the nozzle of the interface touches the first platform (22) of the engaging end. A plastic socket-type sprinkler head for fire-fighting automatic sprinkler system according to claim 1, characterized in that the surface of the shell of the sprinkler head (1) and the outer wall of the interface are treated by electroplating.

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