CN116201969A - An eccentric pipe joint and a molding die - Google Patents

Abstract

The present invention relates to the technical field of pipe joints, and proposes an eccentric pipe joint and a molding die, including an inner skeleton and a cladding layer covering the inner skeleton, the inner skeleton includes a first skeleton and a second skeleton, and the first A gap is provided between the first frame and the second frame, and an annular groove is provided on the outer side of the cladding layer at a position corresponding to the gap. Through the above technical solution, the problem that the pipe joint in the prior art is difficult to meet the connection under the eccentric use state is solved.

Description

An eccentric pipe joint and a molding die

technical field

The invention relates to the technical field of pipe joints, in particular to an eccentric pipe joint and a molding die.

Background technique

A pipe connection is usually used to connect two interconnected housing parts, for example a motor block with an auxiliary block, to connect the two blocks and to achieve a medium-tight connection. The pipe connection generally comprises a tubular or sleeve-shaped support body made of a hard material, which is provided at its two ends with annular surrounding seals made of rubber-elastic material on the outer and/or inner circumference. In order to connect parts on both sides of the pipe connection, the ends of the pipe connection are introduced into corresponding bores of the parts to be connected or inserted into corresponding pipe connections.

In the prior art, the components connected on both sides of the pipe joint have different working conditions, among which the parts connected at both ends of the pipe joint are of eccentric structure. , the seal at the end is still relatively poor, which is easy to cause leakage; and in some connection occasions where there is vibration, and the equipment to be connected is highly eccentric, it is difficult for ordinary pipe joints to achieve eccentric connection under the condition of ensuring strength, so based on the above Problem, need badly a kind of new pipe joint to solve the above problem.

Contents of the invention

The invention proposes an eccentric pipe joint and a molding die, which solves the problem that the pipe joint in the prior art is difficult to meet the connection under the eccentric use state.

Technical scheme of the present invention is as follows:

An eccentric pipe joint, comprising an inner skeleton and a cladding layer coated on the inner skeleton, the inner skeleton includes a first skeleton and a second skeleton, and a gap is provided between the first skeleton and the second skeleton , an annular groove is provided at a position corresponding to the gap on the outer side of the cladding layer.

The annular groove is an arc-shaped annular groove.

Both the first frame and the second frame are provided with reinforcing bonding holes, and there are a plurality of reinforcing bonding holes, and the plurality of reinforcing bonding holes are arranged on the first frame and the second frame at intervals around the circumference, The cladding passes through the reinforced bonding hole.

There are six reinforcing bonding holes, and the six reinforcing bonding holes are equidistantly arranged on the first frame and the second frame, and the reinforcing bonding holes are located on the first frame and the second frame. The frame is close to one end of the gap.

The first frame is provided with a first thick-walled section and a first thin-walled section, the second frame is provided with a second thick-walled section and a second thin-walled section, and the first thin-walled section and the The gap is provided between the second thin-walled sections, the reinforcing bonding hole is provided on the first thin-walled section and the second thin-walled section, and the first thin-walled section and the second thin-walled section Both the inner and outer sides of the wall section are provided with cladding layers.

Both the first thick-walled section and the second thick-walled section are provided with the cladding layer on the outside, and the inner diameter of the first thick-walled section is smaller than the inner diameter of the second thick-walled section.

Annular protrusions are provided on both ends of the outer side of the cladding layer.

Both ends of the cladding layer are provided with straight extension sections.

A molding die for an eccentric pipe joint, comprising an upper mold base, a mold shell, and a mold core, the mold shell includes a first mold shell and a second mold shell, and the gap between the first mold shell and the second mold shell is For the mold core, the second skeleton and the first skeleton are sequentially sleeved on the mold core from top to bottom, and the upper mold base is connected with the first mold shell and the second mold shell A molding space is formed with the mold core, and an injection port is arranged on the upper mold base, and the injection port communicates with the molding space.

The mold core is provided with an upper core body and a lower core body, there is a shoulder between the upper core body and the lower core body, and the inner diameter of the first thick-walled section is the same as the diameter of the upper core body The inner diameters of the first thin-walled section and the second thin-walled section are larger than the diameter of the lower core, and the inner diameter of the second thick-walled section is smaller than or equal to the diameter of the lower core.

Working principle of the present invention and beneficial effect are:

In the present invention, an eccentric pipe joint is disclosed. The structural form of the pipe joint is that a support body made of internal hard material, that is, a coating layer is arranged outside the inner skeleton, and the coating layer wraps the inner skeleton. The overall pipe joint has a certain strength, and the external cladding layer also improves the corrosion resistance and airtightness. In order to solve the above technical problems, the present invention improves the inner skeleton into a split structure. For the first frame and the second frame, the strength of the pipe joint still meets the requirements to a certain extent. In addition, in order to meet the use requirements of eccentricity and even high eccentricity, the position facing the gap on the cladding layer, An annular groove is provided. When the pipe joint is deformed, on the one hand, the annular groove provides a deformation position guide for the deformation, avoiding damage and compression to other positions. On the other hand, the annular groove relatively thins the cladding layer The thickness is easy to form deformation. Compared with the pipe joints in the prior art, the split joint is more conducive to eccentric displacement. Compared with the coating layer of medium thickness in the prior art, the annular groove reduces the cladding The mutual extrusion force caused by the deformation between the layers protects the cladding layer to a certain extent, thereby solving the problem that the pipe joint in the prior art is difficult to meet the connection under the eccentric use state.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural axonometric view of the present invention;

Fig. 2 is the skeleton internal structure schematic diagram among the present invention;

Fig. 3 is the cross-sectional view of the internal structure of the pipe joint in the present invention;

Fig. 4 is a partial enlarged view of place A in Fig. 3;

Fig. 5 is a schematic diagram of the internal structure of the molding die in the present invention.

In the figure: 1. Inner skeleton, 2. Covering layer, 3. First skeleton, 4. Second skeleton, 5. Gap, 6. Annular groove, 7. Reinforced bonding hole, 8. First thick-walled section, 9, the first thin-walled section, 10, the second thick-walled section, 11, the second thin-walled section, 12, the annular protrusion, 13, the straight extension section, 14, the upper mold base, 15, the mold core, 16, The first mold shell, 17, the second mold shell, 18, the injection port, 19, the upper core body, 20, the lower core body.

Implementation

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all involve the protection scope of the present invention.

As shown in Figures 1 to 4, this embodiment proposes an eccentric pipe joint, including an inner frame 1 and a cladding layer 2 coated on the inner frame 1, and the inner frame 1 includes a first frame 3 and a second frame. There are two frames 4 , a gap 5 is provided between the first frame 3 and the second frame 4 , and an annular groove 6 is provided on the outer side of the cladding layer 2 corresponding to the gap 5 .

In this embodiment, an eccentric pipe joint is disclosed. The structural form of the pipe joint is that a support body made of an internal hard material, that is, a cladding layer 2 is arranged on the outside of the inner skeleton 1, and the cladding layer 2 wraps the inner skeleton 1. In general, on the one hand, the overall pipe joint has a certain strength, and in addition, the outer cladding layer 2 also improves the corrosion resistance and sealing degree. In order to solve the above technical problems, the present invention improves the internal The one-piece structure is specifically divided into the first frame 3 and the second frame 4. To a certain extent, the strength of the pipe joint still meets the requirements. The position facing the gap 5 on the layer 2 is provided with an annular groove 6. When the pipe joint is deformed, on the one hand, the annular groove 6 provides a deformation position guide for the deformation, avoiding damage to other positions. On the one hand, the thickness of the cladding layer 2 is relatively thinned at the annular groove 6, which facilitates deformation. Compared with the pipe joints in the prior art, the split joint is more conducive to eccentric displacement. The annular groove 6 and Compared with the cladding layer 2 of medium thickness in the prior art, the mutual extrusion force caused by deformation between the cladding layers 2 is reduced, thereby protecting the cladding layer 2 to a certain extent, thereby solving the problem of the pipe in the prior art. The joint is difficult to meet the problem of connection under eccentric use state.

The annular groove 6 is an arc-shaped annular groove.

In this embodiment, the annular groove 6 adopts an arc-shaped groove, which is convenient for forming and processing on the one hand. Little damage to cladding layer 2 material.

Both the first frame 3 and the second frame 4 are provided with reinforcing bonding holes 7, and there are multiple reinforcing bonding holes 7, and the plurality of reinforcing bonding holes 7 are arranged on the first frame 3 at intervals And on the second skeleton 4 , the cladding layer 2 passes through the reinforced bonding hole 7 .

In this embodiment, reinforced bonding holes 7 are provided on both the first frame 3 and the second frame 4, and the reinforced bonding holes 7 help the cladding layer 2 pass through the reinforced bonding holes 7 during the coating process. , so as to form an effective positioning connection, thereby improving the stability and reliability of the connection between the cladding layer 2 and the inner frame 1 .

There are six reinforcing bonding holes 7, and the six reinforcing bonding holes 7 are equidistantly arranged on the first frame 3 and the second frame 4, and the reinforcing bonding holes 7 are located on the first frame 3 and one end of the second framework 4 close to the gap 5 .

In this embodiment, those skilled in the art can make adaptive adjustments to the position and quantity of the reinforced joint holes 7 according to the size and usage of the pipe joint. In this embodiment, six reinforced joint holes 7 are adopted, and the first skeleton 3 and the second frame 4 are arranged at equal intervals on the circumference, which improves the uniformity of the connection force between the cladding layers 2. In addition, the position of the reinforced bonding hole 7 is close to the end of the gap 5. When the eccentric displacement installation is performed , there is a better bearing capacity between the cladding layer 2 and the inner skeleton 1 .

The first frame 3 is provided with a first thick-walled section 8 and a first thin-walled section 9, and the second frame 4 is provided with a second thick-walled section 10 and a second thin-walled section 11. The first The gap 5 is provided between the thin-walled section 9 and the second thin-walled section 11, and the reinforcing joint hole 7 is provided on the first thin-walled section 9 and the second thin-walled section 11, so The inner and outer sides of the first thin-walled section 9 and the second thin-walled section 11 are both provided with cladding layers 2 .

In this embodiment, the structures of the first skeleton 3 and the second skeleton 4 are similar, all of which are thick and thin sections combined, wherein the first skeleton 3 has a first thick-walled section 8 and a first thin-walled section 9, and the second skeleton 4 has The second thick-walled section 10 and the second thin-walled section 11, in order to enhance the stability of the connection, the thin-walled section is on the inner side, and the gap 5 is formed by two adjacent thin-walled sections. The section 9 and the second thin-walled section 11 are also all-inclusive, and combined with the reinforced coupling hole 7 of the above-mentioned embodiment, the connection stability of the thin-walled section is further improved.

Both the first thick-walled section 8 and the second thick-walled section 10 are provided with the cladding layer 2 on the outside, and the inner diameter of the first thick-walled section 8 is smaller than the inner diameter of the second thick-walled section 10 .

In this embodiment, the connection stability of the cladding layer 2 is improved between the first thin-walled section 9 and the second thin-walled section 11, and the first thick-walled section 8 and the second thick-walled section 10 are clad on one side. , in order to facilitate positioning when the first skeleton 3 and the second skeleton 4 are used as rubber injection molding, and at the same time, it can ensure the concentricity of the inner and outer holes of the pipe joint, and ensure that the wall thickness of the outer cladding is consistent, thereby improving the sealing performance, while the first thick The wall section 8 and the second thick-wall section 10 play a role in improving the strength, wherein the inner diameter of the first thick-wall section 8 is smaller than the inner diameter of the second thick-wall section 10, which is convenient for forming and manufacturing.

Annular protrusions 12 are provided on both ends of the outer side of the cladding layer 2 .

In this embodiment, ring-shaped protrusions 12 are provided at both ends of the outer sides of the cladding layer 2. The shape of the ring-shaped protrusions 12 can be adaptively selected by those skilled in the art. In this embodiment, it is preferably arc-shaped. Good fit improves sealing and installation effects, and on the other hand, the arc-shaped annular protrusion 12 also helps to disperse the extrusion force.

Both ends of the cladding layer 2 are provided with straight extension sections 13 .

In this embodiment, the ends of both ends of the cladding layer 2 are also designed with straight extension sections 13, which help the shape of the ends to be complete and avoid damage to the cladding layer 2 caused by too sharp molds during molding. .

As shown in Figure 5, a molding die for an eccentric pipe joint is used to form the eccentric pipe joint, including an upper mold base 14, a mold shell and a mold core 15, and the mold shell includes a first mold shell 16 and a second mold shell Two mold shells 17, the mold core 15 is between the first mold shell 16 and the second mold shell 17, and the second skeleton 4 and the first skeleton 3 are sleeved in sequence from top to bottom On the mold core 15, the upper mold base 14 forms a molding space with the first mold shell 16, the second mold shell 17 and the mold core 15, and the upper mold base 14 is provided with an injection port 18. The injection molding port 18 communicates with the molding space.

The mold core 15 is provided with an upper section core body 19 and a lower section core body 20, and there is a shoulder between the upper section core body 19 and the lower section core body 20, and the inner diameter of the first thick-walled section 8 is the same as that of the first section core body. The diameters of the upper core body 19 are the same, the inner diameters of the first thin-walled segment 9 and the second thin-walled segment 11 are greater than the diameter of the lower core body 20, and the inner diameter of the second thick-walled segment 10 is smaller than or It is equal to the diameter of the lower core body 20 .

In this embodiment, the present invention also discloses a molding die for an eccentric pipe joint. The inner skeleton 1 of the pipe joint is split into two parts, which need to be formed once and partially covered in the cladding layer 2 during the molding process. The forming mold needs to overcome some difficulties, firstly, the fixing problem of the first skeleton 3 and the second skeleton 4 on the mold core 15, secondly, the problem of inner diameter overflow glue coating, and finally, the problem of end surface sealing, among which the first one will The radius of the first skeleton 3 and the second skeleton 4 is improved, and the radius of the mold core 15 is improved, and the first skeleton 3 is clamped on the second skeleton 4 by selecting a suitable height. The first skeleton 3 and the second There is also a gap 5 between the skeletons 4, which solves the problem of installing the skeletons on the one hand, and provides channels for the filling of the first thin-walled section 9 and the second thin-walled section 11 on the other hand. 14 is provided with injection molding port 18, the diameter of injection molding port 18 matches the width of the end of the molding space, providing a powerful extrusion pressure for sealing.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

Claims (10)

1. An eccentric pipe joint, comprising an inner skeleton (11) and a cladding layer (22) covering the inner skeleton (11), characterized in that the inner skeleton (11) includes a first skeleton (33) and the second skeleton (44), a gap (55) is provided between the first skeleton (33) and the second skeleton (44), and the outer side of the cladding layer (22) is connected to the gap (55) The corresponding position is provided with an annular groove (66). 2. The eccentric pipe joint according to claim 1, characterized in that, the annular groove (66) is an arc-shaped annular groove. 3. The eccentric pipe joint according to claim 2, characterized in that, both the first frame (33) and the second frame (44) are provided with reinforced bonding holes (77), and the reinforced bonding holes (77) has a plurality of reinforced bonding holes (77) arranged on the first frame (33) and the second frame (44) at intervals of the circumference, and the cladding layer (22) passes through the Enhanced binding pores (77). 4. The eccentric pipe joint according to claim 3, characterized in that there are six reinforced coupling holes (77), and the six reinforced coupling holes (77) are equidistantly arranged on the first frame ( 33) and the second frame (44), the reinforcing bonding hole (77) is located at one end of the first frame (33) and the second frame (44) close to the gap (55). 5. The eccentric pipe joint according to claim 4, characterized in that, the first frame (33) is provided with a first thick-walled section (88) and a first thin-walled section (99), and the second A second thick-walled section (1010) and a second thin-walled section (1111) are arranged on the skeleton (44), and a The gap (55), the reinforced bonding hole (77) is set on the first thin-walled section (99) and the second thin-walled section (1111), and the first thin-walled section (99) A cladding layer (22) is provided on the inner and outer sides of the second thin-walled section (1111). 6. The eccentric pipe joint according to claim 5, characterized in that, both the first thick-walled section (88) and the second thick-walled section (1010) are provided with the cladding layer (22) on the outside ), the inner diameter of the first thick-walled section (88) is smaller than the inner diameter of the second thick-walled section (1010). 7. The eccentric pipe joint according to claim 1, characterized in that, both ends of the outer side of the cladding layer (22) are provided with annular protrusions (1212). 8. The eccentric pipe joint according to claim 7, characterized in that straight extension sections (1313) are provided at both ends of the cladding layer (22). 9. A molding die for an eccentric pipe joint, used for forming the eccentric pipe joint according to any one of claims 1 to 7, characterized in that it comprises an upper mold base (14), a mold shell and a mold core (15) , the mold shell includes a first mold shell (16) and a second mold shell (17), and the mold core (15) is between the first mold shell (16) and the second mold shell (17) ), the second skeleton (4) and the first skeleton (3) are sleeved on the mold core (15) from top to bottom in sequence, and the upper mold base (14) and the first mold The shell (16), the second mold shell (17) and the mold core (15) form a molding space, and the upper mold base (14) is provided with an injection port (18), and the injection port (18) communicate with the molding space. 10. The molding die for eccentric pipe joints according to claim 9 when citing claim 5, characterized in that, the core (15) is provided with an upper core (19) and a lower core (20), the There is a shoulder between the upper core (19) and the lower core (20), the inner diameter of the first thick-walled segment (8) is the same as the diameter of the upper core (19), and the first The inner diameters of the first thin-walled section (9) and the second thin-walled section (11) are larger than the diameter of the lower core (20), and the inner diameter of the second thick-walled section (10) is smaller than or equal to the The diameter of the lower core body (20).

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