A connecting pipe

Abstract

A connecting pipe fitting, including pipe fitting main body, the elongated pipe of pipe fitting main body upper side is equipped with and the connecting nut of elongated pipe upper end, the inner wall of elongated pipe upper end pipe orifice is equipped with the annular sealing groove of one, the sealing sleeve matched with it is equipped in sealing groove, the outer wall of elongated pipe upper end is equipped with the annular limiting portion of one, the outer wall of the end of sealing sleeve away from elongated pipe middle part is equipped with the annular sealing portion of one, the pressure structure matched with sealing portion is equipped on limiting portion, the end of connecting nut adjacent elongated pipe middle part is equipped with the clamping structure matched with sealing sleeve, the annular clamping groove of one is equipped in sealing groove adjacent elongated pipe middle part, the outer wall of the end of sealing sleeve adjacent elongated pipe middle part is equipped with the clamping portion matched with clamping groove. The connecting pipe fitting of the utility model can always guarantee the sealing property when connecting with pipeline, effectively avoid the situation of water leakage.

Description

Technical Field

[0001] This utility model relates to a pipe fitting, and more particularly to a connecting pipe fitting. Background Technology

[0002] In fluid transport systems, two independent pipes are often connected by a fitting. Traditionally, the connection between the fitting and the pipe relies mainly on an O-ring at the connection point to ensure a tight seal. However, O-rings are made of rubber, which is prone to losing elasticity over time, eventually leading to poor sealing and leakage. Leakage not only wastes water but also poses certain safety hazards. Utility Model Content

[0003] The present invention aims to solve the existing technical problem by providing a connecting pipe fitting that can always ensure its sealing when connected to a pipe, effectively preventing water leakage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This utility model discloses a connecting pipe fitting, including a pipe fitting body, an extension pipe disposed on the upper side of the pipe fitting body, and a connecting nut disposed on the upper end of the extension pipe. The inner wall of the upper end of the extension pipe has an annular sealing groove; a matching sealing sleeve is disposed within the sealing groove; an annular limiting portion is disposed on the outer wall of the upper end of the extension pipe; an annular sealing portion is disposed on the outer wall of the sealing sleeve at the end away from the middle of the extension pipe; a pressure structure matching the sealing portion is disposed on the limiting portion; and a clamping mechanism matching the sealing sleeve is disposed at the end of the connecting nut near the middle of the extension pipe. Structure: The sealing groove has an annular locking groove at one end near the middle of the extended pipe; the outer wall of the sealing sleeve near the middle of the extended pipe has a locking part that matches the locking groove; the sealing sleeve, sealing part, and locking part are integrally formed and are all made of silicone; the inner wall of the sealing sleeve near the middle of the extended pipe has an annular groove; an O-ring that matches it is provided in the annular groove; the connecting nut is screwed onto the outer wall of a pipe end; a connector that matches the inner wall of the extended pipe opening extends from the pipe end port, and the sealing sleeve and O-ring are both fitted over the connector.

[0005] The pressure structure includes a pressure plate disposed between the limiting part and the sealing part; the pressure plate is annular and is sleeved on the outside of the extension tube; the side wall of the limiting part away from the middle of the extension tube is provided with a plurality of pressure holes evenly distributed in a circle; a pressure spring is provided between the bottom of the pressure hole and the pressure plate.

[0006] The clamping structure includes several circumferentially evenly distributed grooves on the outer walls of both ends of the extension tube, which are connected to the sealing grooves. Matching sliders are provided within the grooves. A clamping part, fitted onto the outer wall of the extension tube, is provided on the inner wall of the connecting nut near the middle of the extension tube. A clamping conical surface is provided on the inner wall of the clamping part, with its diameter decreasing towards the middle of the extension tube. A pressure-bearing surface that fits against the clamping conical surface is provided on the outer end of the slider. An annular clamping groove is provided on the outer wall of the sealing sleeve. A matching clamping ring is provided within the clamping groove. The clamping ring is composed of several circumferentially evenly distributed clamping elements, with clamping gaps between adjacent clamping elements. The inner end of the slider presses against the outer wall of its corresponding clamping element.

[0007] The width of the clamping groove decreases from the outside to the inside; the upper and lower sides of the clamping member are provided with extrusion surfaces that fit against the inner wall of the clamping groove; there is an extrusion gap between the inner wall of the clamping member and the bottom of the clamping groove.

[0008] The clamping component has a positioning hole in the middle; the inner end face of the slider has a positioning block that matches the positioning hole; the distance between the slider and the connecting nut is less than the thickness of the positioning block.

[0009] This utility model has the following beneficial effects: Compared with existing technologies, the sealing sleeve of the connecting pipe fitting using the structure of this utility model forms a first seal by fitting its inner wall to the outer wall of the joint, and a second seal by fitting its sealing part to the pipe end face. Therefore, if water in the extended pipe is to leak to the outside, it needs to break through the first seal and the second seal in sequence. The existence of the two seals can ensure the sealing performance of the extended pipe when connected to the pipe to the greatest extent. The clamping structure can further clamp the sealing sleeve to the outer wall of the joint, further improving the sealing effect of the first seal. The pressure structure can keep the sealing part pressed against the pipe end face at all times, effectively ensuring the sealing effect of the second seal, thereby minimizing the risk of water leakage, preventing water waste, and effectively eliminating safety hazards. Attached Figure Description

[0010] Figure 1 This is a structural schematic diagram of the connecting pipe fitting of this utility model; Figure 2 yes Figure 1 An enlarged view of part A. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Please see Figure 1 , Figure 2This utility model provides a connecting pipe fitting, including a pipe fitting body 27, an extension pipe 1 disposed on the upper side of the pipe fitting body 27, and a connecting nut 2 disposed on the upper end of the extension pipe 1. The inner wall of the upper end of the extension pipe 1 is provided with an annular sealing groove 3; a matching sealing sleeve 4 is disposed in the sealing groove 3; an annular limiting part 5 is provided on the outer wall of the upper end of the extension pipe 1; an annular sealing part 6 is provided on the outer wall of the end of the sealing sleeve 4 away from the middle of the extension pipe 1; a pressure structure matching the sealing part 6 is provided on the limiting part 5; and a clamping structure matching the sealing sleeve 4 is provided on the end of the connecting nut 2 near the middle of the extension pipe 1. The sealing groove 3 has an annular locking groove 7 at one end near the middle of the extension tube 1; the sealing sleeve 4 has a locking part 8 on the outer wall of one end near the middle of the extension tube 1 that matches the locking groove 7; the sealing sleeve 4, the sealing part 6, and the locking part 8 are integrally formed and are all made of silicone; the sealing sleeve 4 has an annular groove 9 on the inner wall of one end near the middle of the extension tube 1; the annular groove 9 has a matching O-ring 10; the connecting nut 2 is screwed onto the outer wall of the end of a pipe 11; the end port of the pipe 11 extends into a connector 12 that matches the inner wall of the pipe opening of the extension tube 1, and the sealing sleeve 4 and the O-ring 10 are both fitted over the connector.

[0012] The pressure structure includes a pressure plate 13 disposed between the limiting part 5 and the sealing part 6; the pressure plate 13 is annular and is sleeved on the outside of the extension tube 1; the side wall of the limiting part 5 away from the middle of the extension tube 1 is provided with a plurality of pressure holes 14 evenly distributed in a circle; a pressure spring 15 is provided between the bottom of the pressure hole 14 and the pressure plate 13.

[0013] The clamping structure includes several circumferentially evenly distributed grooves 16 on the outer walls of both ends of the extension tube 1, which are connected to the sealing groove 3; a matching slider 17 is provided in the groove 16; a clamping part 21 is provided on the inner wall of the end of the connecting nut 2 near the middle of the extension tube, which is fitted onto the extension tube; a clamping cone surface 18 is provided on the inner wall of the clamping part 21, the diameter of which decreases towards the middle of the extension tube 1; a pressure-bearing surface 19 is provided on the outer end of the slider 17, which fits against the clamping cone surface 18; an annular clamping groove 20 is provided on the outer wall of the sealing sleeve 4; a matching clamping ring is provided in the clamping groove 20; the clamping ring is composed of several circumferentially evenly distributed clamping members 22, with clamping gaps between adjacent clamping members 22; the inner end of the slider 17 presses against the outer wall of the corresponding clamping member 22.

[0014] The width of the clamping groove 20 decreases from the outside to the inside; the clamping member 22 has extrusion surfaces 23 on its upper and lower sides that fit against the inner wall of the clamping groove 20; there is an extrusion gap 24 between the inner wall of the clamping member 22 and the bottom of the clamping groove 20.

[0015] The clamping member 22 has a positioning hole 25 in the middle; the inner end face of the slider 17 has a positioning block 26 that matches the positioning hole 25; the distance between the slider 17 and the connecting nut 2 is less than the thickness of the positioning block 26.

[0016] The method of using this utility model is as follows: Simply screw the connecting nut 2 onto the outside of the pipe 11 to quickly complete the connection and fixation between the extension pipe 1 and the pipe 11. At this time, the connector at the end of the pipe 11 is inserted into the extension pipe 1, and the sealing sleeve 4 is fitted onto the outside of the connector 12. The fit between the inner wall of the sealing sleeve 4 and the outer wall of the connector 12 forms the first seal, and the fit between the sealing part 6 and the end face of the pipe 11 forms the second seal. Therefore, if the water in the extension pipe 1 is to leak to the outside, it needs to break through the first seal and the second seal in sequence. The existence of the two seals can ensure the sealing performance when the extension pipe 1 and the pipe 11 are connected to the greatest extent. The presence of the O-ring 10 can further ensure the sealing performance between the inner wall of the sealing sleeve 4 and the outer wall of the connector 12.

[0017] When the connecting nut 2 is screwed onto the outside of the end of the pipe 11, the connecting nut 2 will move away from the middle of the extension pipe 1. At this time, the clamping cone surface 18 of the clamping ring will press inward against the pressure surface 19. At this time, the slider 17 will move inward along the track of the slide groove 16. When the slider 17 moves inward, it will press inward against the clamping member 22, so that the clamping ring composed of several clamping members 22 evenly distributed in a circle tightly clamps the sealing sleeve 4, and the inner wall of the sealing sleeve 4 is further pressed against the outer wall of the joint 12, thereby further improving the sealing effect of the sealing sleeve 4 and preventing water leakage. Even if the elasticity of the sealing sleeve 4 weakens, the sealing effect of the sealing sleeve 4 to the joint can always be guaranteed by the clamping ring.

[0018] The width of the clamping groove 20 decreases from the outside to the inside. The clamping member 22 has extrusion surfaces 23 on its left and right sides that fit against the inner wall of the clamping groove 20. There is an extrusion gap 24 between the inner wall of the clamping member 22 and the bottom of the clamping groove 20. When the clamping member 22 presses the sealing sleeve 4 inward, the clamping member 22 will press the inner wall of the clamping groove 20 through the extrusion surfaces 23 on its upper and lower sides. At this time, the sealing sleeve 4 is compressed and will further fit against the outer wall of the joint 12, thereby improving the sealing effect of the sealing sleeve 4 again.

[0019] When the extension pipe 1 is connected to the pipe 11, the presence of the sealing part 6 can effectively ensure the sealing between the limiting part 5 and the end face of the pipe 11. At the same time, the elastic force of the pressure spring 15 can always act on the pressure plate 13, and the pressure plate 13 presses the sealing part 6 tightly against the end face of the pipe 11. Therefore, even if the sealing part 6 is elastically lubricated, the pressure spring 15 can keep the sealing part 6 always in contact with the end face of the pipe 11, thereby always ensuring the sealing effect of the sealing part 6.

[0020] The clamping member 22 has a positioning hole 25 in the middle. The inner end face of the slider 17 has a positioning block 26 that matches the positioning hole 25. The distance between the slider 17 and the connecting nut 2 is less than the thickness of the positioning block 26. The fit between the positioning block 26 and the positioning hole 25 can ensure that the clamping member 22 will not shift position while the slider 17 moves freely. This effectively avoids the situation where the slider 17 cannot apply pressure evenly to the clamping member 22 due to the positional shift of the clamping member 22, thereby effectively ensuring the clamping effect of the clamping ring on the sealing sleeve 4.

[0021] The presence of the extension pipe 1 allows the connecting nut 2 to protrude above the ground after the pipe body 27 is installed, making pipe installation and maintenance convenient and quick, without damaging the base plate, reducing unnecessary losses and effectively saving costs.

Claims

1. A connecting pipe fitting, comprising a fitting body, an extension pipe disposed on the upper side of the fitting body, and a connecting nut disposed on the upper end of the extension pipe, characterized in that: The upper end of the extended tube has an annular sealing groove on its inner wall; a matching sealing sleeve is provided in the sealing groove; an annular limiting part is provided on the upper outer wall of the extended tube; an annular sealing part is provided on the outer wall of the sealing sleeve away from the middle of the extended tube; a pressure structure matching the sealing part is provided on the limiting part; a clamping structure matching the sealing sleeve is provided on the connecting nut near the middle of the extended tube; an annular locking groove is provided on the sealing groove near the middle of the extended tube; a locking part matching the locking groove is provided on the outer wall of the sealing sleeve near the middle of the extended tube; the sealing sleeve, sealing part, and locking part are integrally formed and are all made of silicone; an annular groove is provided on the inner wall of the sealing sleeve near the middle of the extended tube; a matching O-ring is provided in the annular groove; the connecting nut is screwed onto the outer wall of a pipe end; a connector matching the inner wall of the extended tube opening extends from the pipe end port, and the sealing sleeve and O-ring are both fitted over the connector.

2. A connecting pipe fitting according to claim 1, characterized in that: The pressure structure includes a pressure plate disposed between the limiting part and the sealing part; the pressure plate is annular and is sleeved on the outside of the extension tube; the side wall of the limiting part away from the middle of the extension tube is provided with a plurality of pressure holes evenly distributed in a circle; a pressure spring is provided between the bottom of the pressure hole and the pressure plate.

3. A connecting pipe fitting according to claim 1, characterized in that: The clamping structure includes several circumferentially evenly distributed grooves on the outer wall of the upper end of the extension tube, which are connected to the sealing groove. A matching slider is provided within each groove. The inner wall of the connecting nut near the middle of the extension tube has a clamping part fitted onto the extension tube. The inner wall of the clamping part has a clamping conical surface, the diameter of which decreases towards the middle of the extension tube. The outer end of the slider has a pressure-bearing surface that fits against the clamping conical surface. The outer wall of the sealing sleeve has an annular clamping groove. A matching clamping ring is provided within the clamping groove. The clamping ring is composed of several circumferentially evenly distributed clamping elements, with clamping gaps between adjacent clamping elements. The inner end of the slider presses against the outer wall of its corresponding clamping element.

4. A connecting pipe fitting according to claim 3, characterized in that: The width of the clamping groove decreases from the outside to the inside; the upper and lower sides of the clamping member are provided with extrusion surfaces that fit against the inner wall of the clamping groove; there is an extrusion gap between the inner wall of the clamping member and the bottom of the clamping groove.

5. A connecting pipe fitting according to claim 3, characterized in that: The clamping component has a positioning hole in the middle; the inner end face of the slider has a positioning block that matches the positioning hole; the distance between the slider and the connecting nut is less than the thickness of the positioning block.

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