CN213576133U

CN213576133U - Three-way joint

Info

Publication number: CN213576133U
Application number: CN202022595378.4U
Authority: CN
Inventors: 朱旭林
Original assignee: Hunan Tianli Ruijia New Material Technology Co ltd
Current assignee: Hunan Tianli Ruijia New Material Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-06-29
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a three-way joint, which comprises three metal connectors, a metal connector main body and three metal wedging caps, wherein the connectors and the connector main bodies are mutually connected; the integration is provided with the convex cyclic annular arch of axis direction to the tee bend on the radial inner wall of connector, and the wedging cap cover is established the radial outside of the joint end of connector, the thickness of wedging cap is greater than the thickness of connector, during the tee bend installation, the application of force makes the wedging cap is when locking to tee bend's three axial tip respectively, cyclic annular arch inwards oppresses on the outer wall of metal pipeline tip, forms tee bend and metal pipeline's the connection and the first line defence line of sealed. The product provided by the utility model has good sealing effect; the product is light, and the raw material cost is greatly saved; the wedging cap can not fall off before installation, and the installation is convenient.

Description

Three-way joint

Technical Field

The utility model belongs to the pipe connection spare field, concretely relates to a three way connection who is used for linking to each other between the metal water pipe.

Background

The existing metal fittings for connecting metal water pipes generally comprise two generations of products. In the first generation of joint products, the sealing structure for preventing water leakage is a rubber sealing ring, and belongs to a soft sealing structure. The sealing ring in the product is easy to age and damage, and easily releases toxin at high temperature, thus being not environment-friendly. The connection mode of the second generation joint product and the metal water pipe is clamping and pressing type, compaction and sealing, and belongs to a hard sealing structure. The second generation products need to be sealed by filling materials such as polytetrafluoroethylene and the like during installation, so that the use is inconvenient.

For example, chinese patent CN201921339260 provides a sealing connection structure of a pipe, which includes a connector arranged outside the pipe, the end of the connector is provided with a plurality of sealing rings at intervals, an inner annular surface of each sealing ring is provided with a pressure reducing inclined surface, and the inclination directions of the pressure reducing inclined surface and the pressure reducing inclined surface are kept consistent; a locking cap is arranged outside the connecting piece, and a clamp point convex ring for applying clamping force to hydraulic pressure is formed on the outer surface of the middle end part of the connecting piece; the locking cap is characterized in that a horn-shaped flaring structure is formed in one end of the locking cap, the pipe is located in the connecting piece in a preassembly state, an outer port of the flaring structure of the locking cap is in contact with the connecting piece, when the hydraulic pliers exert force and act on the locking cap and the pliers point convex ring at the same time, the connecting piece is extruded into the locking cap after passing through the flaring structure of the locking cap to form a connecting and sealing structure between the connecting piece and the pipe. The utility model has high connecting strength, good sealing effect and long service life; the whole connecting structure is stable, the machining procedures are few, the machining precision requirement is low, and the machining cost is greatly reduced.

However, the joint provided by this patent does not solve the problem of caulking by ptfe and the joint still requires two people to install successfully.

Accordingly, there is a need in the art to provide a new pipe joint that addresses at least some of the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a three-way joint, the three-way joint is used for connecting a plurality of metal pipelines, the three-way joint comprises three metal connectors (2), a metal connector main body (3) and three metal wedging caps (4), and the connectors (2) and the connector main bodies (3) are connected with each other; the connector (2) comprises a joint end (21) close to the center of the three-way joint and a pipeline end (22) far away from the center of the three-way joint, the connector main body (3) comprises a center end (31) and three telecentric ends (32) which are located at the center of the three-way joint, every two of the central axes of the three telecentric ends (32) of the connector main body (3) form included angles of 0-170 degrees, and the three joint ends (21) and the three telecentric ends (32) are arranged to be in one-to-one connection fit; the pipe joint is characterized in that an annular protrusion protruding towards the central axis direction of the tee joint is integrally arranged on the radial inner wall of the connector (2), the wedging cap (4) can be sleeved on the radial outer side of the joint end (21) of the connector (2), the thickness of the wedging cap (4) is larger than that of the connector (2), the outer wall of the connector (2) comprises at least one slope surface (23), the slope surface is a conical table top with a large outer diameter close to the pipe end (22) and a small outer diameter close to the joint end (21), the inner wall of the wedging cap (4) is provided with an oblique tightening surface matched with the slope surface (23), and the oblique tightening surface is also a conical table top with a large inner diameter at one end and a small inner diameter at the other end; the slope surface (23) and the inclined tightening surface are matched for the wedge cap (4) to smoothly slide from the joint end (21) to the pipeline end (22) and enable the tee joint to lock the pipeline at the end; when the three-way joint is installed and the wedging caps are respectively locked to the three axial end parts of the three-way joint by force application, the annular bulges are inwards pressed on the outer wall of the end part of the metal pipeline to form a first defense line for connecting and sealing the three-way joint and the metal pipeline.

In a specific embodiment, the three-way joint further comprises three external O-rings (1), wherein the external O-rings (1) are used for connecting and sealing the three-way joint with a metal pipeline; in the axial direction of the three-way joint, the external O-shaped ring (1) is arranged at the axial outer end of the annular bulge, namely the tail end of the three-way joint close to the three connectors (2) to form a second sealing line for connecting and sealing the three-way joint and the metal pipeline.

In a specific embodiment, the distal end (32) is matched with the joint end (21) in a threaded connection mode, or the distal end (32) is sleeved with the joint end (21) and used for welding and fixing the distal end and the joint end.

In a particular embodiment, the distal end (32) of the connector body (3) includes external or internal threads.

In a particular embodiment, the engagement end (21) is a small diameter end of the outer diameter of the connector (2), the conduit end (22) is a large diameter end of the outer diameter of the connector (2), the small diameter end includes a cylindrical outer diameter surface a1, the large diameter end includes a cylindrical outer diameter surface a2, and the ramp surface (23) is disposed between the two cylindrical outer diameter surfaces.

In a specific embodiment, each connector (2) comprises at least two annular projections on the inner wall, and the two annular projections are arranged in the axial direction of the tee joint in a front-to-back manner.

In a specific embodiment, a blocking shoulder A (24) for preventing the wedging cap (4) from disengaging from the tee joint from the axial end is provided on the pipe end (22) of the coupling head (2).

In a particular embodiment, the wedging cap (4) is arranged to be slidable in a certain axial direction of the three-way joint, radially outside the connection head (2) and the joint body (3), when the three-way joint is not installed.

In a particular embodiment, the tee further comprises an auxiliary seal (5), the auxiliary seal (5) being used for connection and sealing of the tee inner member.

In a particular embodiment, the secondary seal (5) is an inscribed O-ring.

In a specific embodiment, every two central axes of the three far ends (32) of the joint main body (3) form an included angle of 0-150 degrees; preferably, the joint main body (3) is integrally T-shaped, namely the central axes of the two far-center ends (32) of the joint main body (3) are the same, and the central axis of the other far-center end (32) forms an included angle of 90 degrees with the central axis.

The utility model discloses following beneficial effect has at least:

1) the sealing effect is good: the utility model discloses a sealing of three way connection product is mainly with hard sealing to the soft sealing of O type circle is for assisting, need not use polytetrafluoroethylene to joint in the installation, and it is more convenient to install, and sealed effect is better, and product property ability is stronger simultaneously.

2) The product is light, and the raw material cost is greatly saved.

3) The wedging cap can not fall off before installation, and the installation is convenient.

4) During installation, the end part of the metal pipeline cannot fall off from the joint, and the number of installation workers is saved.

In general, the utility model adopts the mode of combining soft and hard seals for the first time, wherein the hard seal belongs to the riveting process between metals, the plastic filling is stopped, and the problem of hidden water leakage caused by aging of plastic or rubber sealing rings is solved; wherein soft seal can ensure the product at first and further ensure the sealing stability of product when the deformation is bent in the transition, promotes the factor of safety of water pipe to the safety of guarantee water. And the soft seal can correspondingly save the labor amount for installing the joint. Furthermore, the utility model discloses well sealed direction of hard has special, makes the utility model discloses well pipe joint's raw and other materials quantity reduces.

Drawings

Fig. 1 is a perspective view of an exploded structure of the three-way joint of the present invention.

Fig. 2 is a side view of the structure before the installation of the three-way joint of the present invention.

Figure 3 is the cross-sectional view of the front view direction of the structure before the installation of the three-way joint of the present invention.

Figure 4 is a perspective view of the structure of the tee joint before installation.

In the figure: 1. the sealing device comprises an external O-shaped ring 2, a connector 3, a connector main body 4, a wedging cap 5 and an auxiliary sealing element.

Detailed Description

As shown in fig. 1 to 4, the utility model provides a three-way joint, which is used for connecting a plurality of metal pipelines, and comprises three metal connectors (2), a metal connector main body (3) and three metal wedging caps (4), wherein the connectors (2) and the connector main body (3) are connected with each other; the connector (2) comprises a joint end (21) close to the center of the three-way joint and a pipeline end (22) far away from the center of the three-way joint, the connector main body (3) comprises a center end (31) and three telecentric ends (32) which are located at the center of the three-way joint, every two of the central axes of the three telecentric ends (32) of the connector main body (3) form included angles of 0-170 degrees, and the three joint ends (21) and the three telecentric ends (32) are arranged to be in one-to-one connection fit; the pipe joint is characterized in that an annular protrusion protruding towards the central axis direction of the tee joint is integrally arranged on the radial inner wall of the connector (2), the wedging cap (4) can be sleeved on the radial outer side of the joint end (21) of the connector (2), the thickness of the wedging cap (4) is larger than that of the connector (2), the outer wall of the connector (2) comprises at least one slope surface (23), the slope surface is a conical table top with a large outer diameter close to the pipe end (22) and a small outer diameter close to the joint end (21), the inner wall of the wedging cap (4) is provided with an oblique tightening surface matched with the slope surface (23), and the oblique tightening surface is also a conical table top with a large inner diameter at one end and a small inner diameter at the other end; the slope surface (23) and the inclined tightening surface are matched for the wedge cap (4) to smoothly slide from the joint end (21) to the pipeline end (22) and enable the tee joint to lock the pipeline at the end; when the three-way joint is installed and the wedging caps are respectively locked to the three axial end parts of the three-way joint by force application, the annular bulges are inwards pressed on the outer wall of the end part of the metal pipeline to form a first defense line for connecting and sealing the three-way joint and the metal pipeline.

Before the three way connection installation, three way connection among the prior art has the condition that the wedging cap breaks away from three way connection, the utility model discloses in the diameter through design cylindrical external diameter face A2 be greater than cylindrical external diameter face A1's diameter to and keep off the shoulder through further design, make the wedging cap in the transportation keep being located three way connection's axial middle part, thereby just solved the wedging cap from the design and drop the problem outside roll-off to three way connection. The utility model discloses a three way connection product can wholly throw before the installation, can not four scatter. Therefore, the transportation is more convenient, and the installation is also more convenient.

The utility model discloses in, the material of metal pipeline and metal joint all can the free choice stainless steel, copper or cast iron.

The utility model discloses in, sealing connection between the inside component of three way connection is except relying on threaded connection between connector (2) and joint main part (3), can also glue on the external screw thread of connector (2) or joint main part (3) when three way connection installs, has twisted connector (2) and joint main part (3) again during the installation and can make and connect the inside seal and not leak. Of course, instead of applying glue, auxiliary seals or a welded connection after the shrink fit can be used.

The utility model provides a third generation metal joint product, it no longer need use polytetrafluoroethylene when being connected with metal water pipe.

The utility model discloses possess following difference with patent CN 20192133929260 at least: the utility model provides a wedging cap 4 sets up at three way connection's axial middle part position, and it is located connector 2 and the centre that connects main part 3 in the axial. That is to say, the wedging cap 4 of the present invention is arranged axially inside, while the locking cap 1 of patent CN201921339260 is arranged at the axial end of the joint. Secondly, because the structures of the two pipe joints are different, the two pipe joints are different in installation mode when being installed. In particular, patent CN201921339260 is a device in which the locking cap 3 is moved in the axial direction gradually closer to the axial center point of the joint, pressing the connector 2 and locking the pipe. The wedging cap 4 of the utility model moves away from the center point of the three-way joint gradually in the axial direction to extrude the connector 2, thereby locking the pipe.

Furthermore, the utility model discloses possess following characteristics at least:

1) sealing the joint and the pipeline: the first seal is a hard seal, and particularly comprises two metal rings which protrude inwards from the radial inner side wall of the connector (2) and are arranged in the axial direction of the connector in a front-back mode. The second seal is a soft seal, in particular to an O-shaped ring arranged on the outer side of the joint shaft of the metal ring, namely the external O-shaped ring (1). Therefore, the external O-shaped ring (1) only plays a role of safety, and generally cannot contact liquid in a pipeline, so that the service life of the external O-shaped ring is greatly prolonged. The external O-shaped ring (1) has other two functions, one function is that when the pipeline is bent within 30 degrees for installation, the original hard seal is easy to lose efficacy, and at the moment, the external O-shaped ring (1) plays a main sealing effect. The other is when erection joint on the pipeline, external O type circle (1) possesses elasticity, and the pipeline tip inserts and connects in and forms the friction between the O type circle, can effectively prevent the pipeline roll-off and drop to outside the joint, consequently the utility model provides a three way connection only needs a workman can accomplish the installation.

3) The structure of the joint determines different mounting modes: in the prior art, the connection mode of the joint and the metal pipeline is pushed from the axial end position of the joint to the axial center position of the joint, for example, the installation mode in patent CN 201921339260. And the utility model discloses well joint and metal pipeline's connected mode puts to drawing to the three tip position of axial that connects for the central point from the joint, specifically is that the use tool draws wedging cap 4, the utility model provides an operating means makes the installation that connects more light reliable. Specifically, the locking cap in the joint in the prior art needs to be guided by using a mounting tool, while the wedging cap in the utility model is guided by the structure inside the joint, specifically by the outer wall surface of the joint (2); in addition, the use of external O type circle, therefore the utility model discloses a joint only needs the operation alone to accomplish when the installation. When the existing pipeline joint is installed, one person needs to hold the pipeline joint by hand, and the other person operates a tool to assemble the joint.

4) Product structure and mounting means's difference makes three way connection's total length can be shorter, material saving: because the change of mounting means, the axial is changed by interior to interior by exterior during the installation, under the same slip stroke condition of two kinds of products, the utility model discloses a three way connection product can be shorter. For example, a three-way junction product of the same application and thickness can reduce the total weight of the DN20 three-way junction by about 37% because the axial dimension of the junction is shortened. That is to say, the utility model provides a joint product can show and practice thrift raw and other materials cost under the prerequisite that does not sacrifice any product performance.

The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions and replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The three-way joint is characterized by being used for connecting a plurality of metal pipelines, and comprising three metal connectors (2), a metal connector main body (3) and three metal wedging caps (4), wherein the connectors (2) and the connector main body (3) are connected with each other; the connector (2) comprises a joint end (21) close to the center of the three-way joint and a pipeline end (22) far away from the center of the three-way joint, the connector main body (3) comprises a center end (31) and three telecentric ends (32) which are located at the center of the three-way joint, every two of the central axes of the three telecentric ends (32) of the connector main body (3) form included angles of 0-170 degrees, and the three joint ends (21) and the three telecentric ends (32) are arranged to be in one-to-one connection fit; the pipe joint is characterized in that an annular protrusion protruding towards the central axis direction of the tee joint is integrally arranged on the radial inner wall of the connector (2), the wedging cap (4) can be sleeved on the radial outer side of the joint end (21) of the connector (2), the thickness of the wedging cap (4) is larger than that of the connector (2), the outer wall of the connector (2) comprises at least one slope surface (23), the slope surface is a conical table top with a large outer diameter close to the pipe end (22) and a small outer diameter close to the joint end (21), the inner wall of the wedging cap (4) is provided with an oblique tightening surface matched with the slope surface (23), and the oblique tightening surface is also a conical table top with a large inner diameter at one end and a small inner diameter at the other end; the slope surface (23) and the inclined tightening surface are matched for the wedge cap (4) to smoothly slide from the joint end (21) to the pipeline end (22) and enable the tee joint to lock the pipeline at the end; when the three-way joint is installed and the wedging caps are respectively locked to the three axial end parts of the three-way joint by force application, the annular bulges are inwards pressed on the outer wall of the end part of the metal pipeline to form a first defense line for connecting and sealing the three-way joint and the metal pipeline.

2. The three-way joint according to claim 1, further comprising three external O-rings (1), said external O-rings (1) being used for connection and sealing of the three-way joint to a metal pipe; in the axial direction of the three-way joint, the external O-shaped ring (1) is arranged at the axial outer end of the annular bulge, namely the tail end of the three-way joint close to the three connectors (2) to form a second sealing line for connecting and sealing the three-way joint and the metal pipeline.

3. The three-way joint according to claim 1, wherein the distal end (32) is screwed to the engagement end (21) or the distal end (32) is fitted to the engagement end (21) and fixed by welding.

4. The three-way joint according to claim 3, wherein the distal end (32) of the joint body (3) comprises an external or internal thread.

5. The three-way joint according to claim 1, wherein the engagement end (21) is a small-diameter end of the outer diameter of the connector (2), the conduit end (22) is a large-diameter end of the outer diameter of the connector (2), the small-diameter end includes a cylindrical outer diameter surface a1, the large-diameter end includes a cylindrical outer diameter surface a2, and the ramp surface (23) is disposed between the two cylindrical outer diameter surfaces.

6. Three-way connection according to claim 1, characterized in that the inner wall of each connection head (2) comprises at least two annular projections, which are arranged one behind the other in the axial direction of the three-way connection.

7. Three-way connection according to any one of claims 1 to 3, characterized in that the pipe end (22) of the connection head (2) is provided with a stop shoulder A (24) for preventing the wedging cap (4) from disengaging from the three-way connection from the axial end.

8. The three-way joint according to any one of claims 1 to 3, further comprising an auxiliary seal (5), the auxiliary seal (5) being used for connection and sealing of the three-way joint internals.

9. Three-way connection according to claim 8, characterized in that the secondary seal (5) is an inscribed O-ring.

10. The three-way joint according to any one of claims 1 to 3, wherein the joint body (3) is generally T-shaped, i.e. the central axes of the two distal ends (32) of the joint body (3) are the same, and the central axis of the other distal end (32) forms an angle of 90 ° with the central axis.