CN209146542U - Push-in fitting - Google Patents

Abstract

The utility model discloses an internal push-type pipe connection device, which solves the technical problem that the connection device of pipes and pipe fittings in the prior art is not durable. The push-in type pipe connection device includes a pipe connecting piece and a locking cover, a locking ring for holding the pipe is arranged between the pipe connecting piece and the locking cover, and the locking cover is used for pressing the locking ring and locking the The upper part of the through hole of the cover is provided with a tapered section, the upper part of the outer peripheral surface of the locking ring is provided with a corresponding upper tapered surface, and the top opening of the connecting hole is provided with an inner tapered surface, so that the upper tapered surface of the locking ring is connected with the tapered section. Match and push the lower end of the locking ring against the inner cone surface. When the locking cover and the pipe connector are connected, the locking ring in the locking cover is pushed forward by the conical section. After the pipe is inserted into the connecting hole, the locking ring can reduce the diameter and hold the pipe tightly. The reverse radial force exerted outward is jointly borne by the locking cover and the pipe connecting piece, so that the locking ring is prevented from being damaged by pressure alone, and the durability of the pipe section device is enhanced.

Description

Push-in fitting

technical field

The utility model relates to the technical field of pipeline connection devices, in particular to an internal push-type pipe connection device.

Background technique

For water supply and drainage projects, it is often necessary to connect pipes of different directions, different diameters, or the same direction, and these connections are realized by pipe fittings as intermediate connectors.

Since there are generally a large number of connection points in the pipeline system, and maintenance work is inevitable in the later stage of the pipeline system, the pipe fittings that need to be used as intermediate connectors are easy to install, easy to disassemble, and have good sealing performance.

The traditional connection methods between drainage pipes and pipe fittings are mostly in the form of flexible rubber ring connection, bonding and hot-melt connection. Although bonding and hot-melt connection are tightly connected and have good sealing performance, they are not conducive to later pipeline maintenance and cannot be used. It is a good solution to the thermal expansion problem of the material, while the traditional flexible connection of the rubber ring is difficult to install, the rubber ring is easy to dislocate, and cannot be freely disassembled for maintenance.

An existing connection method is that a split ring is provided in the pipe fitting, and the split ring is sleeved on the pipe. The method not only makes the connection and installation between the pipe and the pipe fittings convenient, but also facilitates the disassembly and maintenance in the later stage, but it is a big test for the sealing performance after the connection and the pressure bearing capacity of the pipe fittings.

For example, the Chinese patent document with publication number CN206846157U describes a connection and fastening device for pipe fittings, which belongs to the technical field of molds. , including a split ring that can abut against the end of the pipe, the split ring is annular, the split ring is provided with an opening that penetrates the split ring in the axial direction, the connection and fastening device also includes a connection sleeve that can be connected to the outer side wall of the pipe, The split ring is arranged in the connecting sleeve, and the connecting sleeve can be connected with the pipe and reduce the opening of the split ring. The connecting sleeve and the split ring in the connection and fastening device of the pipe fitting are matched by the conical surfaces to compress the split ring, and the radial force exerted by the split ring on the connecting sleeve is all borne by the connecting sleeve, so that the connecting sleeve bears a larger pressure , If the wall of the connecting sleeve is thin, or the diameter of the connecting sleeve is large, it is easy to cause the outer wall of the connecting sleeve to crack and shorten the life of the pipe fittings, so the wall surface of the connecting sleeve needs to be thickened, which will increase the cost of making the connecting sleeve and cause the connecting sleeve. The size is increased, and the installation situation is limited. In addition, the connection and fastening device of the pipe described in this patent document has no space for placing the sealing ring, and the sealing performance is poor.

Based on the above reasons, it is necessary to provide a pipe connection device that is durable and has good sealing performance.

Utility model content

The utility model aims to provide an internal push-type pipe connection device, which solves the technical problem that the connection device between pipes and pipe fittings in the prior art is not durable.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A push-in type pipe connection device is designed, which includes a pipe connector and a locking cover, the pipe connector has a connection hole for accommodating a pipe, and the locking cover has a through hole for the pipe to pass through. A locking ring for holding the pipeline is provided between the pipe connector and the locking cover, the locking cover is used for pressing the locking ring, and the upper part of the through hole of the locking cover is provided with a tapered The upper part of the outer peripheral surface of the locking ring is provided with a corresponding upper tapered surface, and the top opening of the connecting hole is provided with an inner tapered surface, so that the upper tapered surface of the locking ring matches the tapered segment The combination pushes the lower end of the locking ring against the inner tapered surface.

Preferably, the lower part of the outer peripheral surface of the locking ring is provided with a lower conical surface corresponding to the inner conical surface.

Preferably, the lower part of the through hole of the locking cover is provided with an inner thread, and the outer wall surface of the upper end of the connecting hole is provided with a corresponding outer thread.

Preferably, a stepped portion is provided below the inner cone surface, and a corresponding sealing ring is provided on the stepped portion.

Preferably, the sealing ring is an O-ring.

Preferably, the bottom surface of the locking ring abuts against the top surface of the sealing ring, so that the bottom surface of the locking ring presses against the top surface of the sealing ring.

Preferably, the upper end of the locking cover is provided with a flange, and a plurality of strip-shaped reinforcing ribs are evenly distributed on the outer peripheral surface of the locking cover.

Preferably, the top end of the through hole of the locking cover is a reduced diameter portion, so that the top surface of the locking ring abuts against the bottom surface of the reduced diameter portion.

Preferably, the inner wall surface of the locking ring is provided with at least one annular protrusion for holding the pipeline tightly.

The beneficial technical effects of the present utility model are:

1. The push-in type pipe connection device provided by the present utility model is provided with a tapered section at the upper part of the through hole of the locking cover, and an inner tapered surface is provided at the top opening of the connection hole of the pipe connector. The locking ring is pushed forward by the conical section, the upper part of the locking ring is squeezed radially inward by the conical section, the lower part of the locking ring is squeezed radially inward by the inner cone surface, and the pipe is inserted After connecting the hole, the locking ring can reduce the diameter and hold the pipe tightly, and at the same time, the reverse radial force exerted by the locking ring is jointly borne by the locking cover and the pipe connector, so as to avoid damage to the locking ring due to pressure alone, and enhance the Durability of the pipe section device.

2. A sealing ring is provided between the split ring and the conical socket to enhance the sealing between the pipe and the pipe fittings.

Description of drawings

FIG. 1 is a partial cross-sectional view of an embodiment of the push-in type pipe connection device of the present invention when connecting pipes;

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

3 is a perspective view of a split ring in an embodiment of the push-in type pipe connection device of the present invention;

4 is a cross-sectional view of a split ring in an embodiment of the push-in type pipe connection device of the present invention.

In the figure, the symbols are indicated as: pipeline connector 11, connecting hole 111, inner tapered surface 1111, stepped portion 1112, locking cover 12, through hole 121, tapered section 122, reduced diameter portion 123, flange 124, reinforcement Rib 125 , pipe 13 , locking ring 14 , upper conical surface 141 , lower conical surface 142 , opening 143 , sealing ring 15 .

Detailed ways

The specific embodiments of the present utility model will be described below in conjunction with the accompanying drawings and examples, but the following examples are only used to describe the present utility model in detail, and do not limit the scope of the present utility model in any way.

Example 1:

See Figures 1 through 4.

As shown in FIG. 1 , the push-in pipe connection device provided by the embodiment of the present invention includes a pipe connector 11 and a locking cover 12 . The pipe connector 11 is an elbow, and the locking cover 12 is provided with a locking ring 14 , the pipe 13 passes through the locking cover 12, the locking ring 14, and the sealing ring 15 in sequence, and finally insert the end of the pipe 13 into the pipe connecting piece 11, and then connect the locking cover 12 to the upper end of the pipe connecting piece 11, and lock the The ring 14 is pressed between the locking cover 12 and the pipe connecting piece 11 , and the locking ring 14 hugs the pipe 13 to prevent the pipe 13 and the pipe connecting piece 11 from being detached.

Specifically, as shown in FIG. 2 , the pipe connector 11 has a connection hole 111 for accommodating the pipe 13 , the inner diameter of the connection hole 111 is the same as the outer diameter of the pipe 13 , and the locking cover 12 has a hole for the pipe 13 to pass through. Through hole 121, the inner diameter of the through hole 121 is larger than the outer diameter of the locking ring 14, and the inner diameter of the locking ring 14 is slightly smaller than the outer diameter of the pipe 13.

The upper part of the through hole 121 is provided with a conical section 122 , the upper part of the outer peripheral surface of the locking ring 14 is provided with a corresponding upper conical surface 141 , the top opening of the connecting hole 111 is provided with an inner conical surface 1111 , and the lower part of the outer peripheral surface of the locking ring 14 is provided with a corresponding upper conical surface 141 . A lower tapered surface 142 corresponding to the inner tapered surface 1111 is provided.

When the locking cover 12 is connected with the upper end of the pipe connector 11, the upper tapered surface 141 of the locking ring 14 is matched with the tapered section 122, and the tapered section 122 is slightly larger than the height of the upper tapered surface 141, so that the locking The ring 14 is pushed down by the conical section 122, and the lower end of the locking ring 14 abuts against the inner conical surface 1111. The conical section 122 exerts an inward radial force on the upper conical surface 141 of the locking ring 14, while the The inner tapered surface 1111 exerts an inward radial force on the lower tapered surface 142 of the locking ring 14. Since the locking ring 14 has an opening that penetrates through its wall surface in the axial direction, the locking ring 14 will reduce its diameter and hold the pipe 13 tightly. .

Since the reverse radial force exerted by the locking ring 14 is jointly borne by the tapered section 122 and the inner conical surface 1111 , the reverse radial force exerted by the locking ring 14 is finally connected by the locking cover 12 and the pipe The parts 11 bear together, rather than a single component, so that the locking cover 12 can be prevented from being easily broken and damaged due to the locking cover 12 being individually pressurized, and the durability of the locking cover 12 is enhanced.

The locking cover 12 and the pipe connector 11 are connected by threads. The lower part of the through hole 121 of the locking cover 12 is provided with an inner thread, and the outer wall of the upper end of the connection hole 111 is provided with a corresponding outer thread.

The top end of the through hole 121 of the locking cover 12 is the diameter-reduced portion 123, so that as the inner diameter of the locking ring 14 becomes smaller, the top surface of the locking ring 14 can abut against the bottom surface of the diameter-reduced portion 123 to ensure that the locking ring can be Push the diameter down. In addition, the sealing ring 15 is an O-ring, and the bottom surface of the locking ring 14 abuts the top surface of the sealing ring 15 , so that the bottom surface of the locking ring 15 presses the top surface of the sealing ring 15 .

Further, the upper end of the locking cover 12 is further provided with a flange 124 extending radially outward, and a plurality of strip-shaped reinforcing ribs 125 are evenly distributed on the outer peripheral surface of the locking cover 12 under the flange 124 . The conical section 122 bears a part of the reverse radial force exerted by the locking ring 14 , and the flange 124 is located outside the conical section 122 to enhance the pressure bearing capacity of the corresponding position of the locking cover 12 .

As shown in FIG. 4 , the inner wall surface of the locking ring 14 is provided with two annular protrusions 144, and the annular protrusions 144 are downwardly inverted teeth. When the diameter of the locking ring 14 is reduced, the annular protrusions 144 can promote the holding Tighten the pipeline and improve the anti-pulling ability of the pipeline.

The present utility model has been described in detail above in conjunction with the accompanying drawings and the embodiments, but those skilled in the art can understand that, without departing from the purpose of the present utility model, each specific parameter in the above-mentioned embodiments can also be adjusted. Modifications to form multiple specific embodiments are all within the common variation range of the present invention, and will not be described in detail here.

Claims (9)

1. a kind of interior pushing-type pipe connection device, including conduit coupling and locking lid, the conduit coupling has for accommodating pipe The connecting hole in road, the locking lid have the through-hole for passing through for pipeline, set between the conduit coupling and locking lid There is the retaining ring for holding pipeline tightly, the locking lid is for compressing the retaining ring, which is characterized in that the locking lid is led to Hole top is equipped with conical section, and the top of the retaining ring outer peripheral surface is equipped with the upper conical surface accordingly, the top opening of the connecting hole Place is equipped with inner conical surface, pushes the retaining ring lower end to contradict so that the upper conical surface of the retaining ring merges with conical section matching On the inner conical surface.

2. interior pushing-type pipe connection device according to claim 1, which is characterized in that the lower part of the retaining ring outer peripheral surface is equipped with The lower conical surface corresponding with the inner conical surface.

3. interior pushing-type pipe connection device according to claim 1, which is characterized in that the through-hole lower part of the locking lid is equipped with interior The upper end outside wall surface of screw thread, the connecting hole is equipped with corresponding external screw thread.

4. interior pushing-type pipe connection device according to claim 1, which is characterized in that be equipped with step below the inner conical surface Portion is equipped with corresponding sealing ring in the stage portion.

5. interior pushing-type pipe connection device according to claim 4, which is characterized in that the sealing ring is O-ring.

6. interior pushing-type pipe connection device according to claim 4, which is characterized in that the bottom surface of the retaining ring is against described close The top surface of seal, so that the bottom surface of the retaining ring compresses the top surface of the sealing ring.

7. interior pushing-type pipe connection device according to claim 1, which is characterized in that the upper end of the locking lid is equipped with flange, And the outer peripheral surface of the locking lid is evenly equipped with multiple bar shaped reinforcing ribs.

8. interior pushing-type pipe connection device according to claim 1, which is characterized in that the through-hole top of the locking lid is undergauge Portion, so that the top surface of the retaining ring is contradicted in the reducing diameter part bottom surface.

9. interior pushing-type pipe connection device according to claim 1, which is characterized in that the inner wall of the retaining ring is equipped at least Together for holding the annular protrusion of pipeline tightly.