Improved structure of pipe joint
The combined structure of the expansion washer group and the tightening ring solves the problem of poor corrosion resistance of the rubber sealing ring and achieves a sealing and leak-proof effect on various types of pipe joints.
Patent Information
- Application Number
- CN202422124881.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing pipe joint sealing rings are mostly made of rubber, which has poor corrosion resistance and is not suitable for industrial equipment that transports oils, fats and chemical materials.
The combined structure of the expansion washer group, the tightening ring and the nut is adopted, and the sealing and leak-proof effect between the pipe joint and the pipe fitting is achieved through the radial expansion of the expansion washer group and the clamping of the tightening ring.
It achieves a leak-proof sealing effect in a corrosion-resistant environment and is suitable for a variety of pipe joint types, including two-way joints and elbow joints.
Smart Images
Figure CN223306477U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an improved structure of a pipe joint. Background Art
[0002] Currently, most pipe connections and assembly structures utilize various types of pipe joints. Common pipe joints include: pipe cap joints, elbow joints, two-way joints, and multi-way joints (such as tees and crosses). To facilitate quick and easy installation and prevent leaks, pipe joints are equipped with nuts and gaskets. Once the pipe is inserted into the joint, the nut applies pressure to the pipe and gasket, tightening the pipe and achieving a leak-proof seal.
[0003] Taiwan's Utility Model Patent No. 505758, "Pipe Connector for Water Supply Devices" (Application No. 091104362), discloses a water supply device pipe connector with a sealing ring installed in an annular recess on the inner side of the connector body. A spherical ring and an annular cover are sequentially installed within the push-pull inner circumference of the cap nut. The cap nut is then screwed onto the male thread of the connector body. During on-site construction, the pipe to be connected is inserted through the pre-assembled pipe connector end, and the cap nut is then tightened by turning. At this time, the spherical ring is pushed by the push-pull inner circumference of the cap nut, pushing the annular cover and sealing ring, thereby achieving a tight seal and preventing leaks.
[0004] However, the sealing ring generally installed in the annular recess on the inner side of the end of the joint body is mostly made of rubber. Although the rubber sealing ring has a better deformation rate and better sealing and leak-proof effect, it is only suitable for pipe joints used on pipes for water supply devices. It is not suitable for industrial equipment pipelines that transport oils and chemical materials because the rubber sealing ring is not corrosion-resistant. Utility Model Content
[0005] Purpose of the utility model: In view of the deficiencies of the above-mentioned prior art, the utility model provides an improved structure of a pipe joint.
[0006] Technical solution: An improved pipe joint structure, in particular a pipe joint adapted for various pipe joint openings, comprising a pipe joint body, an expansion washer assembly, a gasket, a tightening ring, and a nut, wherein:
[0007] The first pipe opening of the pipe joint body is provided with a flared portion, the bottom of the flared portion is provided with a ring bevel portion, and the outer side of the first pipe opening of the pipe joint body is provided with a first external thread;
[0008] The expansion gasket assembly includes an external pressure gasket, at least one V-shaped gasket and an inner bottom gasket, the inner side of the external pressure gasket is provided with a first V-shaped annular groove, the inner side of the V-shaped gasket is provided with a second V-shaped annular groove, the outer side of the V-shaped gasket is provided with a second V-shaped rib, and the height of the second V-shaped rib on the outer side of the V-shaped gasket is less than the depth of the first V-shaped annular groove on the inner side of the external pressure gasket, the inner side of the inner bottom gasket is provided with an annular inclined surface, the outer side of the inner bottom gasket is provided with a third V-shaped rib, and the height of the third V-shaped rib on the outer side of the inner bottom gasket is less than the depth of the second V-shaped annular groove on the inner side of the V-shaped gasket; a plurality of steel balls are arranged on the ring body of the tightening ring, and each steel ball is exposed on the inner and outer annular surfaces of the tightening ring body;
[0009] The front inner side of the nut is provided with an inner thread, and the rear side of the nut is provided with an oblique cone portion;
[0010] In the pipe opening of the pipe joint body, first place the expansion washer assembly into the flared part, and make the ring bevel on the inner side of the inner bottom gasket of the expansion washer assembly press against the ring bevel part, then place the tightening ring into the oblique cone part of the nut, and then place the gasket into the nut. Then, screw the nut with the tightening ring and gasket onto the first pipe opening of the pipe joint body, so that the expansion washer assembly, gasket and tightening ring are limited between the pipe joint body and the nut.
[0011] When the expansion washer assembly is squeezed by the locking operation of the nut, the second V-shaped rib on the outside of the V-shaped gasket will expand the first V-shaped ring groove on the inside of the outer pressure gasket, and the third V-shaped rib on the outside of the inner bottom gasket will expand the second V-shaped ring groove on the inside of the V-shaped gasket, causing the ring body of the expansion washer assembly to radially expand and thicken, so that the expansion washer assembly expands and presses tightly between the pipe joint body and the pipe fitting to achieve a sealing and leak-proof effect; moreover, when the nut pushes the tightening ring forward, the steel balls on the tightening ring will also press against the pipe fitting to clamp the pipe fitting.
[0012] The utility model is suitable for a pipe joint of various pipe joints and pipe openings, and comprises a pipe joint body, an expansion washer group, a gasket, a tightening ring and a nut. The expansion washer group is expanded and pressed tightly between the pipe joint body and the pipe fitting to achieve the effect of sealing and preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.
[0015] Figure 3 It is a cross-sectional schematic diagram of the present utility model.
[0016] Figure 4 It is a schematic diagram of the structural cross-section of the expansion washer group.
[0017] Figure 5It is a schematic diagram of the structural cross-section of the expansion washer group.
[0018] Figure 6 It is a cross-sectional schematic diagram of the implementation state of the utility model.
[0019] Figure 7 It is a cross-sectional schematic diagram of the implementation state of the utility model.
[0020] Figure 8 This is a schematic diagram of the implementation of the two-way connector of the utility model.
[0021] Figure 9 This is a schematic diagram of the implementation of the utility model connecting elbow joints.
[0022] in:
[0023] 10: Pipe joint body 11: Expansion part 12: Ring bevel 13: First external thread 20: Expansion washer set 21: External pressure gasket 211: First V-shaped ring groove 22: V-type gasket 221: Second V-shaped ring groove 222: Second V-shaped rib 23: Insole gasket 231: Ring Bevel 232: Third V-shaped rib 30: Gasket 40: tightening ring 41: Steel Ball 50: Nut 51: Internal thread 52: oblique cone 60: Pipe fittings 10': Two-way connector 10”: elbow joint a: first gap b: Second gap DETAILED DESCRIPTION
[0024] The detailed contents and technical means of the present invention are described below with the help of specific embodiments and accompanying drawings:
[0025] See also Figures 1 to 4 The improved structure of a pipe joint, in particular, refers to a pipe joint adapted for various pipe joints and pipe openings, which is composed of a pipe joint body 10, an expansion washer assembly 20, a gasket 30, a tightening ring 40 and a nut 50, wherein:
[0026] The first pipe opening of the pipe joint body 10 is provided with a flared portion 11, the bottom of the flared portion 11 is provided with a ring bevel portion 12, and the outer side of the first pipe opening of the pipe joint body 10 is provided with a first external thread 13;
[0027] The expansion gasket assembly 20 includes an external pressure gasket 21, at least one V-shaped gasket 22, and an inner bottom gasket 23. The inner side of the external pressure gasket 21 is provided with a first V-shaped annular groove 211, the inner side of the V-shaped gasket 22 is provided with a second V-shaped annular groove 221, the outer side of the V-shaped gasket 22 is provided with a second V-shaped convex rib 222, and the height of the second V-shaped convex rib 222 on the outer side of the V-shaped gasket 22 is less than the depth of the first V-shaped annular groove 211 on the inner side of the external pressure gasket 21. The inner side of the inner bottom gasket 23 is provided with an annular inclined surface 231, and the outer side of the inner bottom gasket 23 is provided with a third V-shaped convex rib 232, and the height of the third V-shaped convex rib 232 on the outer side of the inner bottom gasket 23 is less than the depth of the second V-shaped annular groove 221 on the inner side of the V-shaped gasket 22.
[0028] A plurality of steel balls 41 are provided on the ring body of the tightening ring 40, and each steel ball 41 is exposed on the inner and outer annular surfaces of the tightening ring 40;
[0029] An inner thread 51 is provided on the front inner side of the nut 50, and an oblique tapered portion 52 is provided on the rear side of the nut 50. In the pipe opening of the pipe joint body 10, the expansion washer assembly 20 is first placed into the flared portion 11, and the annular bevel 231 on the inner side of the inner bottom gasket 23 of the expansion washer assembly 20 is made to abut against the annular bevel 12, and then the tightening ring 40 is placed into the oblique tapered portion 52 of the nut 50. Then, the gasket 30 is placed into the nut 50 and located outside the tightening ring 40. Then, the nut 50 with the tightening ring 40 and the gasket 30 is screwed onto the first pipe opening of the pipe joint body 10, so that the expansion washer assembly 20, the gasket 30 and the tightening ring 40 are confined to the first pipe opening of the pipe joint body 10 and the nut 50. That is, the expansion washer assembly 20, the gasket 30 and the tightening ring 40 are mutually squeezed and fixed by the screw connection between the pipe opening of the pipe joint body 10 and the nut 50.
[0030] The first V-shaped annular groove 211 on the inner side of the external pressure gasket 21 of the expansion gasket assembly 20 and the second V-shaped rib 222 on the outer side of the V-shaped gasket 22 are in close contact with each other. Since the height of the second V-shaped rib 222 on the outer side of the V-shaped gasket 22 is less than the depth of the first V-shaped annular groove 211 on the inner side of the external pressure gasket 21, a first gap a is left when they are in close contact with each other.
[0031] The second V-shaped annular groove 221 on the inner side of the V-shaped gasket 22 of the expansion gasket assembly 20 is in close contact with the third V-shaped rib 232 on the outer side of the inner bottom gasket 23. Since the height of the third V-shaped rib 232 on the outer side of the inner bottom gasket 23 is less than the depth of the second V-shaped annular groove 221 on the inner side of the V-shaped gasket 22, a second gap b (such as Figure 5 shown);
[0032] If the expansion gasket assembly 20 is squeezed, the second V-shaped rib 222 on the outside of the V-shaped gasket 22 will expand the first V-shaped ring groove 211 on the inside of the external pressure gasket 21, and the third V-shaped rib 232 on the outside of the inner bottom gasket 23 will expand the second V-shaped ring groove 221 on the inside of the V-shaped gasket 22, causing the ring body of the expansion gasket assembly 20 to radially expand and thicken.
[0033] During implementation, when the pipe 60 is inserted from the rear side of the nut 50, the pipe 60 passes through the tightening ring 40, the gasket 30 and the expansion washer assembly 20, so that the front end of the pipe 60 is placed in the first pipe opening of the pipe joint body 10 (such as Figure 6As shown), the nut 50 is then tightened. When the nut 50 is tightened, the tapered portion 52 on the rear side of the nut 50 touches the steel ball 41 on the tightening ring 40, and the tightening ring 40 is pushed forward, pushing the gasket 30 and the expansion washer assembly 20 tightly. Because the inner ring bevel 231 of the inner bottom gasket 23 of the expansion washer assembly 20 is tightly against the ring bevel 12, the inner bottom gasket 23 is pressed against the pipe 60, and as the nut 50 is tightened, When the expansion washer assembly 20 is squeezed, the second V-shaped rib 222 on the outside of the V-shaped gasket 22 will expand the first V-shaped annular groove 211 on the inside of the outer pressure gasket 21, and the third V-shaped rib 232 on the outside of the inner bottom gasket 23 will expand the second V-shaped annular groove 221 on the inside of the V-shaped gasket 22, causing the ring body of the expansion washer assembly 20 to expand and thicken radially, so that the expansion washer assembly 20 expands and presses tightly between the pipe joint body 10 and the pipe fitting 60 (such as Figure 7 moreover, when the nut 50 pushes the tightening ring 40 forward, the steel ball 41 on the tightening ring 40 will also press against the pipe 60, and the pipe 60 is clamped so that the pipe 60 does not fall off.
[0034] Furthermore, a second external thread is provided on the outer side of the second pipe opening of the pipe joint body 10 .
[0035] The improved structure of the pipe joint of the utility model can be applied to other types of pipe joints in actual operation, such as two-way joints, elbow joints, multi-way joints (such as three-way joints, four-way joints, etc.), such as Figure 8 This is a schematic diagram of the implementation of the two-way connector 10' of the present invention. Figure 9 Schematic diagram of the implementation of the utility model connecting elbow joint 10".
[0036] The above describes the embodiments of the present invention in detail. However, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. The improved structure of the pipe joint is characterized by: It consists of a pipe joint body, an expansion washer set, a gasket, a tightening ring and a nut, among which: The first pipe opening of the pipe joint body is provided with a flared portion, the bottom of the flared portion is provided with a ring bevel portion, and the outer side of the first pipe opening of the pipe joint body is provided with a first external thread; The expansion gasket assembly includes an external pressure gasket, at least one V-shaped gasket and an inner bottom gasket, wherein the inner side of the external pressure gasket is provided with a first V-shaped annular groove, the inner side of the V-shaped gasket is provided with a second V-shaped annular groove, the outer side of the V-shaped gasket is provided with a second V-shaped rib, the inner side of the inner bottom gasket is provided with an annular inclined surface, and the outer side of the inner bottom gasket is provided with a third V-shaped rib; The tightening ring is provided with a plurality of steel balls on the ring body, and each steel ball is exposed on the inner and outer annular surfaces of the tightening ring body; The front inner side of the nut is provided with an inner thread, and the rear side of the nut is provided with an oblique cone portion; In the pipe opening of the pipe joint body, first place the expansion washer assembly into the flared part, and make the ring bevel on the inner side of the inner bottom gasket of the expansion washer assembly press against the ring bevel part, then place the tightening ring into the oblique cone part of the nut, and then place the gasket into the nut. Then, screw the nut with the tightening ring and gasket onto the first pipe opening of the pipe joint body, so that the expansion washer assembly, gasket and tightening ring are confined to the first pipe opening of the pipe joint body and the nut.
2. The improved pipe joint structure according to claim 1, characterized in that: The height of the second V-shaped rib on the outer side of the V-shaped gasket is less than the depth of the first V-shaped annular groove on the inner side of the external pressure gasket.
3. The improved pipe joint structure according to claim 1, wherein: The height of the third V-shaped rib on the outer side of the inner bottom gasket is less than the depth of the second V-shaped annular groove on the inner side of the V-shaped gasket.
4. The improved pipe joint structure according to claim 1, wherein: The outer side of the second pipe opening of the pipe joint body is provided with a second external thread.