Connecting mechanism for PVC (polyvinyl chloride) pipe fittings

Abstract

The utility model belongs to the technical field of pipeline connection, and particularly relates to a PVC pipe fitting connecting mechanism which comprises a main pipe, a rubber ring is fixedly connected to the outer wall of the right side of the main pipe, a first connecting pipe is slidably connected to the right side of the main pipe, a supporting ring is fixedly connected to the inner end of the left side of the first connecting pipe, and a liquid bag is fixedly connected to the inner side of the supporting ring. The liquid bag is connected with the rubber ring in a clamped mode, a pressurizing assembly is arranged at the top end of the liquid bag, and a limiting ring is fixedly connected to the middle end of the inner side of the first connecting pipe. According to the connecting mechanism of the PVC pipe fitting, the threaded sleeve, the piston and the sliding block are driven by the lead screw to move downwards to pressurize internal pressurizing liquid, the pressurizing liquid is conveyed into the liquid bag through the second connecting pipe, and then the liquid bag is filled with the pressurizing liquid so that the liquid bag can expand outwards, so that the main pipe and the supporting ring can be expanded tightly; in this way, sealing between the main pipe and the first connecting pipe is achieved, and the problem that a large gap exists between the main pipe and the first connecting pipe can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connection, in particular to a connection mechanism for PVC pipe fittings. Background Art

[0002] PVC pipe connections are widely used in various fields, especially in water conservancy projects and water supply and drainage systems. These connections typically consist of straight pipes, connecting pipes, and various auxiliary components such as rubber rings, retaining rings, and sealing rings to ensure connection stability and tightness.

[0003] After searching, the existing patent (publication number: CN219263522U) discloses a PVC pipe connector, which relates to the field of pipe connection, including a pipe body, one end of the pipe body is movably connected to a connecting pipe, and the end of the connecting pipe is integrally formed with a connecting pipe head, the inner cavity of the connecting pipe head is provided with a plug-in groove, the end of the plug-in groove is an open structure, the end of the pipe body is plugged into the inner cavity of the plug-in groove, the inner wall of the plug-in groove is provided with a limiting groove, the inner cavity of the limiting groove is sleeved with a sealing ring, the sealing ring abuts against the inner wall and outer wall surface of the pipe body, the outer wall surface of the connecting pipe head is a slope structure, and the surface is provided with a thread groove, and the surface of the connecting pipe head is threadedly connected to a No. 1 locking nut through the thread groove; after the new pipe body and the plug-in groove are plugged into each other, the inner wall of the plug-in groove is respectively fitted with the outer wall surface and the inner wall surface of the pipe body through the sealing ring, and by rotating the No. 1 locking nut, the No. 1 locking nut clamps the sealing ring through the connecting pipe head, which can improve the sealing performance of the connection between the connecting pipe head and the pipe body.

[0004] However, in the actual use of this solution, dimensional tolerances in PVC pipes and fittings during production can lead to various connection problems. Tolerance mismatches can affect sealing, causing leaks at joints; compromise mechanical strength, increasing the risk of cracks and breakage; increase installation difficulty, requiring installers to spend more time making adjustments; and increase the complexity and cost of maintenance and replacement. In actual use, this solution fails to address these issues, reducing the device's applicability.

[0005] To this end, the utility model provides a connecting mechanism for PVC pipe fittings. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the problem that PVC pipes have tolerances and that mismatched tolerances may affect sealing, the utility model proposes a connection mechanism for PVC pipe fittings.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a connection mechanism of a PVC pipe fitting described in the utility model includes a main pipe, a rubber ring is fixedly connected to the outer wall of the right side of the main pipe, a connecting pipe 1 is slidably connected to the right side of the main pipe, the left inner end of the connecting pipe 1 is fixedly connected to a support ring, a liquid sac is fixedly connected to the inner side of the support ring, the liquid sac is clamped and connected to the rubber ring, a booster component is provided on the top of the liquid sac, the inner middle end of the connecting pipe 1 is fixedly connected to a limiting ring, and the limiting ring is clamped and connected to the main pipe.

[0008] Furthermore, the booster assembly includes connecting tube 2, the top of the liquid bag is fixedly connected to connecting tube 2, the connecting tube 2 is fixedly connected to connecting tube 1, the top of connecting tube 2 is fixedly connected to a liquid storage tank, the top of the liquid storage tank is fixedly connected to a limiting frame, the top of the limiting frame is provided with a transmission assembly, the inner side of the limiting frame is rotatably connected to a screw rod, the outer side of the middle end of the screw rod is threadedly connected to a threaded sleeve, the outer side of the threaded sleeve is fixedly connected to a piston, the outer side of the piston is fixedly connected to evenly distributed sliders, the inner side of the liquid storage tank is provided with evenly distributed sliding grooves, and the sliding grooves are slidably connected to the sliders.

[0009] Furthermore, the transmission assembly includes a worm, the top of the limit frame is rotatably connected to a worm wheel, the inner side of the worm wheel is fixedly connected to the outer wall of the top of the screw, the rear side of the limit frame is rotatably connected to a worm, and the worm is meshed with the worm wheel.

[0010] Furthermore, a left inner end of the connecting pipe is provided with a clamping groove which is opposed to each other in the upper and lower directions. A fixing block is clamped and connected to the inner side of the clamping groove, and the fixing block is fixedly connected to the main pipe.

[0011] Furthermore, a left inner end of the connecting pipe is rotatably connected to front and rear opposite bolts, and the bolts are threadedly connected to the fixing block.

[0012] Furthermore, a rubber layer is provided on the outside of the piston.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The connection mechanism of a PVC pipe fitting described in the utility model drives the worm wheel and the screw to rotate by rotating the worm, thereby driving the threaded sleeve, the piston, and the slider to move downward to pressurize the internal pressurized liquid, which is then transported into the liquid bag through the connecting pipe 2. The liquid bag is then filled with the pressurized liquid to expand outward, thereby tightening the main pipe and the support ring, thereby achieving a seal between the main pipe and the connecting pipe 1, and can solve the problem of a large gap between the main pipe and the connecting pipe 1.

[0015] 2. The connection mechanism of a PVC pipe fitting described in the utility model engages the fixing block through the card slot, and fixes the connecting pipe 1 and the fixing block through bolts, thereby fixing the main pipe and the connecting pipe 1. While preventing angular deflection between the main pipe and the connecting pipe 1, it also increases the stability between the main pipe and the connecting pipe 1, avoids wear between the main pipe and the connecting pipe 1 due to external vibration, and also provides a stable use environment for the liquid bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of a connecting pipe in the utility model. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of a connecting pipe in the utility model. Figure 2 ;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the liquid storage bin in the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of a connecting pipe in the utility model. Figure 3 ;

[0022] In the figure: 1. Main pipe; 11. Rubber ring; 12. Fixing block; 2. Connecting pipe 1; 21. Slot; 22. Bolt; 23. Support ring; 24. Liquid sac; 25. Limiting ring; 3. Connecting pipe 2; 31. Liquid storage tank; 32. Limiting frame; 33. Worm; 34. Worm gear; 35. Screw; 36. Threaded sleeve; 37. Piston; 38. Slider; 39. Slide groove. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods. Example

[0024] like Figures 1 to 5As shown, a connection mechanism of a PVC pipe fitting described in the present invention includes a main pipe 1, a rubber ring 11 is fixedly connected to the outer wall of the right side of the main pipe 1, the rubber ring 11 is fixed by the main pipe 1, and the surface of the rubber ring 11 is lower than the surface of the main pipe 1, thereby forming a groove, a connecting pipe 2 is slidably connected to the right side of the main pipe 1, and the main pipes 1 on both sides are connected by the connecting pipe 2, a support ring 23 is fixedly connected to the inner end of the left side of the connecting pipe 2, the support ring 23 is fixed by the connecting pipe 2, and a liquid capsule 24 is fixedly connected to the inner side of the support ring 23, and a liquid capsule 24 is fixedly connected to the inner side of the support ring 23. The support ring 23 fixes the liquid capsule 24, and the liquid capsule 24 is engaged with the rubber ring 11. The groove formed on the surface of the liquid capsule 24 and the rubber ring 11 allows the liquid capsule 24 to fit more closely with the rubber ring 11 to increase the sealing performance. A booster component is provided at the top of the liquid capsule 24, and a limiting ring 25 is fixedly connected to the middle end of the inner side of the connecting tube 2. The limiting ring 25 is fixed by the connecting tube 2, and the limiting ring 25 is engaged with the main pipe 1. The main pipe 1 is blocked by the limiting ring 25, thereby limiting the position of the rubber ring 11.

[0025] The booster assembly includes a connecting pipe 23, the top of the liquid capsule 24 is fixedly connected to the connecting pipe 23, the connecting pipe 23 is fixed by the liquid capsule 24, the connecting pipe 23 is fixedly connected to the connecting pipe 1 2, the top of the connecting pipe 23 is fixedly connected to the liquid storage tank 31, the connecting pipe 23 passes through the support ring 23, the connecting pipe 1 2 is connected to the liquid storage tank 31, and the connecting pipe 23 is fixed by the support ring 23 and the connecting pipe 1 2, the top of the liquid storage tank 31 is fixedly connected to the limiting frame 32, the limiting frame 32 is fixed by the liquid storage tank 31, the top of the limiting frame 32 is provided with a transmission assembly, the inner side of the limiting frame 32 is rotatably connected to the screw rod 35, the top of the screw rod 35 is limited by the limiting frame 32, and the outer side of the screw rod 35 The thread allows air to enter the top inner side of the liquid storage tank 31. The outer side of the middle end of the screw rod 35 is threadedly connected to a threaded sleeve 36, which is driven by the screw rod 35 to move up and down. The outer side of the threaded sleeve 36 is fixedly connected to a piston 37, which is fixed by the threaded sleeve 36, driving the piston 37 to move synchronously. The outer side of the piston 37 is fixedly connected to an evenly distributed slider 38, which is fixed by the piston 37. The slider 38 is fixed by the piston 37. The inner side of the liquid storage tank 31 is provided with evenly distributed grooves 39, which are slidably connected to the slider 38. The slider 38 is limited by providing a groove 39 on the inner side of the liquid storage tank 31, thereby preventing the threaded sleeve 36 and the piston 37 from rotating with the screw rod 35.

[0026] The transmission assembly includes a worm 33, a worm wheel 34 is rotatably connected to the top of the limit frame 32, the inner side of the worm wheel 34 is fixedly connected to the outer wall of the top of the lead screw 35, and the rear side of the limit frame 32 is rotatably connected to the worm 33, and the worm 33 is meshed with the worm wheel 34. The worm wheel 34 and the lead screw 35 are limited by the limit frame 32 at the same time, and the meshing connection between the worm wheel 34 and the lead screw 35 can be used to drive the lead screw 35 to rotate by rotating the worm wheel 34.

[0027] A slot 21 is provided at the inner end of the left side of the connecting pipe 2, which is opposite to each other in the upper and lower directions. A fixing block 12 is connected to the inner side of the slot 21. The fixing block 12 is fixedly connected to the main pipe 1. The fixing block 12 is engaged through the slot 21, thereby fixing the main pipe 1 and the connecting pipe 2.

[0028] The left inner end of the connecting pipe 2 is rotatably connected with front and rear opposite bolts 22, and the bolts 22 are threadedly connected to the fixing block 12. The connecting pipe 2 and the fixing block 12 are fixed at the same time by the bolts 22, thereby fixing the main pipe 1 and the connecting pipe 2.

[0029] A rubber layer is provided on the outside of the piston 37 . By providing the rubber layer on the outside of the piston 37 and the slider 38 , the sealing between the piston 37 , the slider 38 and the inner wall of the liquid storage tank 31 and the inner wall of the slide groove 39 is increased.

[0030] Working principle: When the connection mechanism of the PVC pipe fitting is in operation, first align the fixing block 12 on the outside of the main pipe 1 with the slot 21, and after inserting it, rotate the main pipe 1 clockwise to move the fixing block 12 to the deepest part of the slot 21, and then fix the connecting pipe 2 and the fixing block 12 by rotating the bolt 22, and then rotate the worm 33, and the worm gear 34 and the screw rod 35 are driven to rotate by the worm 33 at the same time, and the threaded sleeve 36, the piston 37, and the slider 38 are driven downward by the screw rod 35, so that the pressurized liquid at the bottom end of the slider 38 is squeezed by the slider 38, and transported into the liquid capsule 24 through the connecting pipe 2 3, filling the liquid capsule 24, and tightening the liquid capsule 24 between the rubber ring 11 and the support ring 23, so as to seal the gap between the connecting pipe 2 and the main pipe 1 outside the support ring 23 and the rubber ring 11.

[0031] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A connection mechanism for PVC pipe fittings, characterized in that: The invention comprises a main pipe (1), wherein the outer wall of the right side of the main pipe (1) is fixedly connected to a rubber ring (11), the right side of the main pipe (1) is slidably connected to a connecting pipe (2), the inner end of the left side of the connecting pipe (2) is fixedly connected to a support ring (23), the inner side of the support ring (23) is fixedly connected to a liquid capsule (24), the liquid capsule (24) is connected to the rubber ring (11) by snap-fitting, a boosting component is provided at the top of the liquid capsule (24), the inner middle end of the connecting pipe (2) is fixedly connected to a limiting ring (25), and the limiting ring (25) is connected to the main pipe (1) by snap-fitting.

2. A PVC pipe connection mechanism according to claim 1, characterized in that: The booster assembly includes a second connecting pipe (3), the top of the liquid bag (24) is fixedly connected to the second connecting pipe (3), the second connecting pipe (3) is fixedly connected to the first connecting pipe (2), the top of the second connecting pipe (3) is fixedly connected to the liquid storage tank (31), the top of the liquid storage tank (31) is fixedly connected to the limiting frame (32), the top of the limiting frame (32) is provided with a transmission assembly, the inner side of the limiting frame (32) is rotatably connected to a screw rod (35), the outer side of the middle end of the screw rod (35) is threadedly connected to a threaded sleeve (36), the outer side of the threaded sleeve (36) is fixedly connected to a piston (37), the outer side of the piston (37) is fixedly connected to uniformly distributed sliders (38), the inner side of the liquid storage tank (31) is provided with uniformly distributed slide grooves (39), and the slide grooves (39) are slidably connected to the sliders (38).

3. A PVC pipe connection mechanism according to claim 2, characterized in that: The transmission assembly includes a worm (33), a worm wheel (34) rotatably connected to the top of the limiting frame (32), an inner side of the worm wheel (34) fixedly connected to the outer wall of the top of the screw rod (35), a worm (33) rotatably connected to the rear side of the limiting frame (32), and the worm (33) meshingly connected to the worm wheel (34).

4. A PVC pipe connection mechanism according to claim 3, characterized in that: The left inner end of the connecting pipe (2) is provided with a clamping groove (21) facing each other up and down, and a fixing block (12) is clamped and connected inside the clamping groove (21), and the fixing block (12) is fixedly connected to the main pipe (1).

5. A PVC pipe connection mechanism according to claim 4, characterized in that: The left inner end of the connecting pipe (2) is rotatably connected to a front-to-back opposite bolt (22), and the bolt (22) is threadedly connected to the fixing block (12).

6. A PVC pipe connection mechanism according to claim 5, characterized in that: A rubber layer is provided on the outside of the piston (37).

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