Direct insertion type pipe fitting connector

Abstract

A direct insertion type pipe fitting connector comprises a connector body and a water through hole axially penetrating through the connector body, and the upper portion of the connector body is sleeved with a tubular upper shell. The lower portion of the connector body is sleeved with a tubular lower shell. An annular protrusion is arranged on the outer wall of the middle of the connector body. A limiting structure is arranged on the annular protrusion, and the lower end of the upper shell and the upper end of the lower shell are connected through the limiting structure. The outer walls of the middle parts of the upper shell and the lower shell are respectively provided with a plurality of openings communicated with the inner spaces of the upper shell and the lower shell; an upper clamping jaw located in the upper shell is arranged on the inner wall of the upper side of the opening of the upper shell. A lower clamping jaw located in the lower shell is arranged on the inner wall of the lower side of the opening of the lower shell. And the lower ends of the upper clamping jaw and the lower clamping jaw are inclined towards the axis direction of the joint main body. According to the direct insertion type pipe fitting connector, the connecting efficiency can be effectively improved, the sealing performance of the connected pipe fittings can be guaranteed, and meanwhile the manufacturing cost can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to a pipe fitting connector, and more particularly to a straight-insertion pipe fitting connector. Background Technology

[0002] In the field of fluid transmission system technology, with the structural rise in labor costs in industrialized countries and the continuous advancement of global carbon emission reduction policies, quick-installation pipe fittings are gradually becoming the mainstream technical solution in pipeline engineering due to their modular assembly characteristics, reusability, and significant reduction in construction labor costs.

[0003] With the widespread use of plastic pipes in recent years, the types of pipe fittings have also increased. However, due to the high water pressure inside the plastic water supply pipes, the sealing performance of the pipe fittings has been put forward. Among the existing pipe fittings, there are metal fittings that rely on the engagement of a movable nut with the plastic pipe thread during installation. This connection method is not only structurally complex, but also requires the user to rotate it, which is extremely time-consuming and seriously affects the connection efficiency. At the same time, the thread machining accuracy must be guaranteed. If the thread machining accuracy is insufficient, it will affect the sealing performance. Therefore, precision machining is required to achieve screw-on assembly, which leads to a more complex manufacturing process and increased manufacturing costs. Summary of the Invention

[0004] The present invention aims to solve the existing technical problem by providing a direct-insertion pipe fitting connector, which can not only effectively improve connection efficiency and ensure the sealing performance after pipe connection, but also effectively reduce manufacturing costs.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] This utility model discloses a straight-insertion pipe fitting, including a fitting body and a water passage hole axially penetrating the fitting body. The upper part of the fitting body is fitted with a tubular upper shell; the lower part of the fitting body is fitted with a tubular lower shell; an annular protrusion is provided on the outer wall of the middle portion of the fitting body; a limiting structure is provided on the annular protrusion, and the lower end of the upper shell and the upper end of the lower shell are connected by the limiting structure; the middle portion of the upper shell and the middle portion of the outer wall of the lower shell are each provided with several openings communicating with their internal spaces; the openings of the upper shell... The upper inner wall of the opening is provided with an upper clamping claw located inside the upper housing; the lower inner wall of the opening of the lower housing is provided with a lower clamping claw located inside the lower housing; the lower ends of both the upper and lower clamping claws are inclined towards the axis of the connector body; both the upper and lower clamping claws are elastic; the upper port of the upper housing and the lower port of the lower housing are each provided with a disassembly guide structure; when the disassembly guide structure moves axially towards the middle of the connector body, the distance between the upper clamping claw and the outer wall of the connector body, and the distance between the lower clamping claw and the outer wall of the connector body, increases linearly with the axial movement.

[0007] The disassembly guide structure includes a disassembly guide ring fitted around the connector body; the outer wall of one end of the disassembly guide ring near the middle of the connector body is provided with a compression cone surface; the diameter of the compression cone surface gradually decreases towards the middle of the connector body; the end of a pipe is inserted into the gap between the outer wall of the connector body and the inner wall of the disassembly guide ring; the distance between the upper clamp and the outer wall of the connector body, and the distance between the lower clamp and the outer wall of the connector body are both less than the thickness of the pipe, and the upper and lower clamps are tightly gripped on the outer wall of the pipe.

[0008] The disassembly guide ring is provided with an annular limiting step; the ends of the upper and lower housings away from the connector body are both formed into annular limiting flanges by stamping, and one end of the disassembly guide ring passes through the inner hole of the limiting flange in a direction away from the middle of the connector body; the inner diameter of the limiting flange is smaller than the outer diameter of the limiting step.

[0009] The outer wall of the part of the joint body that penetrates into the pipe fitting is provided with several sealing grooves that are evenly distributed axially; a matching sealing ring is provided in the sealing groove.

[0010] The limiting structure includes a positioning part on the outer wall of the middle part of the annular protrusion, the positioning part being annular; the lower end of the upper shell is fitted over the upper part of the annular protrusion, the lower end face of the upper shell is in contact with the upper surface of the positioning part; the upper end of the lower shell is fitted over the lower part of the annular protrusion, the upper end face of the lower shell is in contact with the lower surface of the positioning part; the outer wall of the annular protrusion is provided with an upper slot above the positioning part and a lower slot below the positioning part, both the upper and lower slots being annular; the lower outer wall of the upper shell and the upper outer wall of the lower shell are each provided with several auxiliary openings communicating with their internal space; the lower inner wall of the auxiliary opening of the upper shell is provided with an upper fixing claw, the upper end of the upper fixing claw is inclined towards the axial direction of the connector body and embedded in the upper slot; the upper inner wall of the auxiliary opening of the lower shell is provided with a lower fixing claw, the lower end of the lower fixing claw is inclined towards the axial direction of the connector body and embedded in the lower slot.

[0011] The upper shell, upper gripper, and upper fixed gripper are integrally formed and all are made of stainless steel; the lower shell, lower gripper, and lower fixed gripper are integrally formed and all are made of stainless steel.

[0012] A positioning gasket is provided between the pipe fitting and the positioning part, outside the joint body, and the positioning gasket is ring-shaped; the lower part of the upper shell and the upper part of the lower shell are provided with several visible holes corresponding to the positions of the positioning gasket.

[0013] The beneficial effects of this utility model are:

[0014] Compared with existing technologies, the direct-insertion pipe fittings using the structure of this utility model can connect pipes simply by inserting them directly. Compared with threaded connections, which require multiple turns, this saves time and effectively ensures connection efficiency. Furthermore, the direct-insertion connection minimizes wear and enables non-destructive disassembly, effectively avoiding poor sealing caused by wear at the connection point. At the same time, multiple sealing rings axially set on the fitting body can further ensure sealing. By eliminating the threading process, direct-insertion pipe fittings can be produced using molds, significantly reducing manufacturing costs. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the straight-insertion pipe fitting connector of this utility model;

[0016] Figure 2 This is a perspective view of the direct-insertion pipe fitting connector of this utility model;

[0017] Figure 3 This is a structural schematic diagram of the direct-insertion pipe fitting connector of this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Please see Figures 1 to 3 This utility model provides a straight-insertion pipe fitting, including a fitting body 1 and a water passage hole 2 axially penetrating the fitting body 1. The fitting body 1 is fitted with a tubular upper shell 3; the fitting body 1 is fitted with a tubular lower shell 4; an annular protrusion 5 is provided on the outer wall of the middle portion of the fitting body 1; a limiting structure is provided on the annular protrusion 5, and the lower end of the upper shell 3 and the upper end of the lower shell 4 are connected by the limiting structure; the middle portion of the upper shell 3 and the middle portion of the lower shell 4 are each provided with several openings 6 communicating with their internal spaces; the openings of the upper shell 3... The upper inner wall of the 6 is provided with an upper clamping claw 7 located inside the upper housing 3; the lower inner wall of the opening 6 of the lower housing 4 is provided with a lower clamping claw 8 located inside the lower housing 4; the lower ends of the upper clamping claw 7 and the lower clamping claw 8 are both inclined towards the axis of the connector body 1; the upper clamping claw 7 and the lower clamping claw 8 are both elastic; the upper end port of the upper housing 3 and the lower end port of the lower housing 4 are both provided with a disassembly guide structure; when the disassembly guide structure moves axially towards the middle of the connector body 1, the distance between the upper clamping claw 7 and the outer wall of the connector body 1, and the distance between the lower clamping claw 8 and the outer wall of the connector body 1 increase linearly with the axial movement.

[0020] The disassembly guide structure includes a disassembly guide ring 9 fitted around the connector body 1; the outer wall of the disassembly guide ring 9 near the middle of the connector body 1 is provided with a compression cone surface 10; the diameter of the compression cone surface 10 gradually decreases towards the middle of the connector body 1; the end of a pipe fitting 11 is inserted into the gap between the outer wall of the connector body 1 and the inner wall of the disassembly guide ring 9; the distance between the upper clamp 7 and the outer wall of the connector body 1, and the distance between the lower clamp 8 and the outer wall of the connector body 1 are both less than the thickness of the pipe fitting 11, and the upper clamp 7 and the lower clamp 8 are tightly gripped on the outer wall of the pipe fitting 11.

[0021] The disassembly guide ring 9 is provided with an annular limiting step 12; the ends of the upper housing 3 and the lower housing 4 away from the connector body 1 are both formed into an annular limiting flange 13 by stamping, and one end of the disassembly guide ring 9 passes through the inner hole of the limiting flange 13 in a direction away from the middle of the connector body 1; the inner diameter of the limiting flange 13 is smaller than the outer diameter of the limiting step 12.

[0022] The outer wall of the part of the joint body 1 that penetrates into the pipe fitting 11 is provided with a plurality of axially uniformly distributed sealing grooves 14; a matching sealing ring 15 is provided in the sealing groove 14.

[0023] The limiting structure includes a positioning part 16 disposed on the outer wall of the middle part of the annular protrusion 5, the positioning part 16 being annular; the lower end of the upper shell 3 is fitted over the upper part of the annular protrusion 5, and the lower end face of the upper shell 3 is in contact with the upper surface of the positioning part 16; the upper end of the lower shell 4 is fitted over the lower part of the annular protrusion 5, and the upper end face of the lower shell 4 is in contact with the lower surface of the positioning part 16; the outer wall of the annular protrusion 5 is provided with an upper slot 17 located above the positioning part 16 and a lower slot 18 located below the positioning part 16, the upper slot 17 and the lower slot 18 being in contact with the positioning part 16. The lower slots 18 are all annular; the lower outer wall of the upper shell 3 and the upper outer wall of the lower shell 4 are provided with a number of auxiliary openings 19 that communicate with their internal space; the lower inner wall of the auxiliary opening 19 of the upper shell 3 is provided with an upper fixing claw 20, the upper end of the upper fixing claw 20 is inclined towards the axial direction of the connector body 1 and embedded in the upper slot 17; the upper inner wall of the auxiliary opening 19 of the lower shell 4 is provided with a lower fixing claw 21, the lower end of the lower fixing claw 21 is inclined towards the axial direction of the connector body 1 and embedded in the lower slot 18.

[0024] The upper housing 3, upper gripper 7, and upper fixed gripper 20 are integrally formed and are all made of stainless steel; the lower housing 4, lower gripper 8, and lower fixed gripper 21 are integrally formed and are all made of stainless steel.

[0025] A positioning gasket 22 is provided between the pipe fitting 11 and the positioning part 16, which is located outside the connector body 1. The positioning gasket 22 is annular. The lower part of the upper shell 3 and the upper part of the lower shell 4 are provided with a number of visible holes 23 corresponding to the positions of the positioning gasket 22.

[0026] The method of using this utility model is as follows:

[0027] When the end of the pipe fitting 11 is inserted into the gap between the outer wall of the connector body 1 and the inner wall of the disassembly guide ring 9, the upper jaw 7 and the lower jaw 8 are both tightly gripped on the outer wall of the end of the pipe fitting 11. Therefore, when the two pipe fittings 11 are respectively fitted on the upper and lower ends of the connector body 1, the stability of the two pipe fittings 11 when connected through the connector body 1 can be effectively guaranteed.

[0028] When the pipe fitting 11 needs to be disassembled, simply press the exposed end of the disassembly guide ring 9 toward the middle of the connector body 1. The extrusion cone 10 will move axially simultaneously and squeeze the upper jaw 7 and lower jaw 8 pressed against the outer wall of the pipe fitting 11. At this time, the upper jaw 7 and lower jaw 8 are squeezed outward by the extrusion cone 10 and move away from the outer wall of the pipe fitting 11. The pipe fitting 11 is then isolated inside the disassembly guide ring 9. The pipe fitting 11 can then be easily moved out along the trajectory of the outer wall of the connector body 1 to the gap between the outer wall of the connector body 1 and the inner wall of the disassembly guide ring 9, thus achieving rapid disassembly of the pipe fitting 11. When no more force is applied to the disassembly guide ring 9, the upper jaw 7 and lower jaw 8 will reset under their own elasticity and push the disassembly guide ring 9 back to its original position.

[0029] When it is necessary to reconnect the fitting 11, hold the fitting 11 and insert the end of the fitting 11 into the gap between the outer wall of the connector body 1 and the inner wall of the disassembly guide ring 9 by straight insertion. At this time, continue to press the disassembly guide ring 9 to expand the upper jaw 7 and the lower jaw 8 outward, effectively increasing the actual distance between the upper jaw 7 and the outer wall of the connector body 1, and between the lower jaw 8 and the outer wall of the connector body 1. Therefore, the fitting 11 can smoothly enter into the gap between the outer wall of the connector body 1 and the inner wall of the disassembly guide ring 9. When the fitting 11 is inserted into place, the end face of the fitting 11 presses the positioning gasket 22 onto the annular protrusion 5. At this time, the user can clearly observe the situation inside the upper housing 3 and the lower housing 4 through the viewing hole 23. When the fitting 11 is observed... When the end face is tightly fitted with the positioning gasket 22, it can be clearly determined that the pipe fitting 11 has been connected in place. Then, the disassembly guide ring 9 can be moved away from the middle of the connector body 1. After the disassembly guide ring 9 has moved a certain distance, it no longer applies pressure to the upper jaw 7 and the lower jaw 8. Without external force intervention, the distance between the upper jaw 7 and the outer wall of the connector body 1, and the distance between the lower jaw 8 and the outer wall of the connector body 1, are both less than the thickness of the pipe fitting 11. Therefore, after the restriction of the disassembly guide ring 9 is removed, the upper jaw 7 and the lower jaw 8 will hold tightly to the outer wall of the pipe fitting 11, effectively ensuring the axial tensile strength of the pipe fitting 11, thereby ensuring the stability of the two pipe fittings 11 when connected through the connector body 1.

[0030] The outer wall of the part of the connector body 1 that penetrates into the pipe fitting 11 is provided with several sealing grooves 14 that are evenly distributed axially. The sealing grooves 14 are provided with matching sealing rings 15. The presence of the sealing rings 15 can effectively ensure the sealing between the outer wall of the connector body 1 and the inner wall of the pipe fitting 11, and prevent water leakage after the pipe fitting 11 is connected.

[0031] In summary, this utility model can complete the connection of the pipe fitting 11 simply by direct insertion. Compared with the threaded connection which requires multiple turns of rotation, it saves more time and effectively ensures connection efficiency. Moreover, the continuous rotation during threaded connection is more likely to cause wear at the connection position, while the direct insertion connection can minimize wear and achieve non-destructive disassembly, effectively avoiding poor sealing caused by wear at the connection position. At the same time, the sealing performance can be further guaranteed by multiple sealing rings 15 axially set on the connector body 1. By eliminating the threading process, the direct insertion pipe fitting can be produced by mold, which can significantly reduce manufacturing costs.

[0032] The disassembly guide ring 9 is provided with an annular limiting step 12. The ends of the upper housing 3 and the lower housing 4 away from the connector body 1 are both formed into an annular limiting flange 13 by stamping. One end of the disassembly guide ring 9 passes through the inner hole of the limiting flange 13 in a direction away from the middle of the connector body 1. The inner diameter of the limiting flange 13 is smaller than the outer diameter of the limiting step 12. The existence of the limiting flange 13 can effectively prevent the disassembly guide ring 9 from detaching from the upper housing 3 and the lower housing 4 by limiting the limiting step 12, ensuring that the disassembly guiding function of the disassembly guide ring 9 can always be realized.

[0033] The auxiliary port 19 of the upper housing 3 is provided with an upper fixing claw 20 on the lower inner wall. The upper end of the upper fixing claw 20 is inclined towards the axial direction of the connector body 1 and embedded in the upper slot 17. The auxiliary port 19 of the lower housing 4 is provided with a lower fixing claw 21 on the upper inner wall. The lower end of the lower fixing claw 21 is inclined towards the axial direction of the connector body 1 and embedded in the lower slot 18. The presence of the upper fixing claw 20 can effectively ensure the stability between the upper housing 3 and the connector body 1, and the presence of the lower fixing claw 21 can effectively ensure the stability between the lower housing 4 and the connector body 1.

[0034] The upper shell 3, upper jaw 7, and upper fixed jaw 20 are integrally formed and all are made of stainless steel. The lower shell 4, lower jaw 8, and lower fixed jaw 21 are integrally formed and all are made of stainless steel. This structural design not only simplifies the processing of the upper shell 3 and the lower shell 4, but also ensures the elasticity of the upper jaw 7, upper fixed jaw 20, lower jaw 8, and lower fixed jaw 21.

Claims

1. A straight-insertion pipe fitting, comprising a fitting body and a water passage hole axially penetrating the fitting body, characterized in that: The connector body is fitted with a tubular upper shell on its upper part and a tubular lower shell on its lower part. An annular protrusion is located on the outer wall of the middle section of the connector body. A limiting structure is provided on the annular protrusion, connecting the lower end of the upper shell to the upper end of the lower shell. Several openings communicating with the internal space are provided on the outer walls of both the middle sections of the upper and lower shells. An upper clamping claw is located inside the upper shell on the inner wall above each opening. A lower clamping claw is located inside the lower shell on the inner wall below each opening. The lower ends of both the upper and lower clamping claws are inclined towards the axis of the connector body. Both the upper and lower clamping claws are elastic. A disassembly guide structure is provided at the upper end of the upper shell and the lower end of the lower shell. When the disassembly guide structure moves axially towards the middle of the connector body, the distance between the upper clamping claw and the outer wall of the connector body, and between the lower clamping claw and the outer wall of the connector body, increases linearly with axial movement.

2. The straight-insertion pipe fitting according to claim 1, characterized in that: The disassembly guide structure includes a disassembly guide ring fitted around the connector body; the outer wall of one end of the disassembly guide ring near the middle of the connector body is provided with a compression cone surface; the diameter of the compression cone surface gradually decreases towards the middle of the connector body; the end of a pipe is inserted into the gap between the outer wall of the connector body and the inner wall of the disassembly guide ring; the distance between the upper clamp and the outer wall of the connector body, and the distance between the lower clamp and the outer wall of the connector body are both less than the thickness of the pipe, and the upper and lower clamps are tightly gripped on the outer wall of the pipe.

3. A straight-insertion pipe fitting according to claim 2, characterized in that: The disassembly guide ring is provided with an annular limiting step; the ends of the upper and lower housings away from the connector body are both formed into an annular limiting flange by stamping, and one end of the disassembly guide ring passes through the inner hole of the limiting flange in a direction away from the middle of the connector body. The inner diameter of the limiting flange is smaller than the outer diameter of the limiting step.

4. A straight-insertion pipe fitting according to claim 2, characterized in that: The outer wall of the part of the joint body that penetrates into the pipe fitting is provided with several sealing grooves that are evenly distributed axially; a matching sealing ring is provided in the sealing groove.

5. A straight-insertion pipe fitting according to claim 1, characterized in that: The limiting structure includes a positioning part on the outer wall of the middle part of the annular protrusion, the positioning part being annular; the lower end of the upper shell is fitted over the upper part of the annular protrusion, the lower end face of the upper shell is in contact with the upper surface of the positioning part; the upper end of the lower shell is fitted over the lower part of the annular protrusion, the upper end face of the lower shell is in contact with the lower surface of the positioning part; the outer wall of the annular protrusion is provided with an upper slot above the positioning part and a lower slot below the positioning part, both the upper and lower slots being annular; the lower outer wall of the upper shell and the upper outer wall of the lower shell are each provided with several auxiliary openings communicating with their internal space; the lower inner wall of the auxiliary opening of the upper shell is provided with an upper fixing claw, the upper end of the upper fixing claw is inclined towards the axial direction of the connector body and embedded in the upper slot; the upper inner wall of the auxiliary opening of the lower shell is provided with a lower fixing claw, the lower end of the lower fixing claw is inclined towards the axial direction of the connector body and embedded in the lower slot.

6. A straight-insertion pipe fitting according to claim 5, characterized in that: The upper shell, upper gripper, and upper fixed gripper are integrally formed and all are made of stainless steel; the lower shell, lower gripper, and lower fixed gripper are integrally formed and all are made of stainless steel.

7. A straight-insertion pipe fitting according to claim 1, characterized in that: A positioning gasket is provided between the pipe fitting and the positioning part, outside the joint body, and the positioning gasket is ring-shaped; the lower part of the upper shell and the upper part of the lower shell are provided with several visible holes corresponding to the positions of the positioning gasket.

Images