CN220540516U - Quick connector - Google Patents

Abstract

The utility model discloses a quick connector, which relates to the technical field of gas pipeline connection and comprises a first connecting piece, a second connecting piece and a connecting body; a short joint is arranged between the first connecting piece and the second connecting piece, the connecting body is sleeved at the connecting position of the first connecting piece and the second connecting piece, an accommodating cavity is formed in the connecting body, and the short joint is positioned in the accommodating cavity; the first connecting piece and the second connecting piece both comprise connecting bodies, and anti-falling steel rings are arranged on the connecting bodies; the anti-falling steel ring comprises a limiting part, and a clamping tooth mouth is arranged on the inner side of the limiting part. The quick connector mainly comprises two connecting pieces, a connecting main body and a short joint, wherein the end parts of the connecting pieces can be provided with rubber ring gaskets, the function of the connecting pieces is to increase tightness of connecting parts, and the short joint is used for improving stress conditions of the connector parts and avoiding overload of axial stress of the quick connector and influencing sealing durability.

Description

Quick connector

Technical Field

The utility model relates to the technical field of gas pipeline connection, in particular to a quick connector.

Background

At present, the tightness of a pipeline is mainly detected through nondestructive testing, hydrostatic testing or other air leakage detection equipment, when the pipeline is installed, welding or flange or joint connection is generally adopted, a leakage detection device which is specially used for carrying out local on-site detection on the installed joint position is lacking at present, and the joint of the pipeline is usually a weak part where the pipeline leaks, so that the leakage detection at the joint of the reinforced pipeline has great significance for safe and stable operation of the steam pipeline. For example, the problems of leakage of pipelines exist in the fields of fuel gas, oil transportation, flue gas purification and the like, for example, the problem that the leakage phenomenon inevitably occurs due to external damage or long-term corrosion of a steel pipe in an indoor fuel gas vertical pipe is taken as an example. Especially, the part of the riser passing through the floor slab is in a wet environment, so that the local corrosion condition of the pipeline is aggravated, the leakage phenomenon is more likely to occur, and the conventional rush-repair method is to mechanically replace the pipe section near the leakage point, namely: cutting off the upper layer and the lower layer of the riser penetrating the floor respectively, and prefabricating a new pipe section for in-situ installation. As the indoor gas vertical pipes are mostly in threaded connection, after the gas leakage pipe sections are cut off, the in-situ pipe ends are not easy to detach, and the thread quality is difficult to be ensured when an in-situ processing method is adopted. In addition, the conventional rush-repair method can damage a user cabinet, a suspended ceiling and the like to a certain extent, and the operation time is long, so that timeliness is seriously affected. Similar problems exist in other areas involving pipes.

The utility model discloses a novel steel-plastic joint for gas pipeline is gone up to bulletin number CN209245552U, including left adapting unit, right adapting unit, adapter sleeve, wherein, left adapting unit one side tip sets up in the adapter sleeve and is connected with the adapter sleeve, right adapting unit one side tip sets up in the adapter sleeve and is connected with the adapter sleeve, left adapting unit be connected with right adapting unit through the adapter sleeve, it is easy operation convenient when the installation, guaranteed the absolute insulation of gas trunk line and branch pipeline, greatly reduced the cost of maintenance of people to gas pipeline, saved the labour, satisfied people's operation requirement. Although this patent discloses a structure in which left and right connection members and a connection sleeve are provided, the structure described in this patent still has problems such as risk of air leakage when connecting flat-mouth pipes.

Therefore, there is a need to solve the problem that the pipe end connecting threads cannot be manufactured in situ in the conventional rush repair method by adopting an improved quick connector which is specially made and does not need threaded connection and welding, connecting flat-mouth pipelines, replacing and repairing local leakage pipe sections, and avoiding the technical aspect.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a quick connector.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

a quick connector comprises a first connecting piece, a second connecting piece and a connecting body; a short joint is arranged between the first connecting piece and the second connecting piece, the connecting body is sleeved outside the first connecting piece and the second connecting piece, a containing cavity is formed in the connecting body, the short joint is positioned in the containing cavity, the first connecting piece and the second connecting piece both comprise connecting bodies, and anti-falling steel rings are arranged on the connecting bodies; the anti-falling steel ring comprises a limiting part, and a clamping tooth mouth is arranged on the inner side of the limiting part.

Based on the technical scheme, furthermore, the clamping tooth mouth is formed by a plurality of annular clamping grooves which are distributed at intervals in a step shape.

Based on the technical scheme, still further, prevent weighing down the steel ring still and include supporting part, supporting part and spacing portion integrated into one piece, and the one end cross-section diameter of the spacing portion of keeping away from supporting part is less than the one end cross-section diameter of the spacing portion of being connected with supporting part.

Based on the technical scheme, further, the limit part and the support part are provided with communicated opening structures.

Based on the technical scheme, further, the end parts of the first connecting piece and the second connecting piece are integrally formed and/or movably connected with the connecting body, and the end parts are sealing gaskets.

Based on the technical scheme, still further, still detachably installs the flat pad on the connector, and the flat pad is located between anti-falling steel ring and the sealed pad.

Based on the technical scheme, still further, connecting body both ends are equipped with external screw thread structure, and are equipped with first convex part between the both ends, and first convex part inboard is established as holding the chamber.

Based on the above technical scheme, still further, connecting body both ends still are equipped with first cavity respectively, and first cavity is the tapering structure, and tip entry diameter is greater than the diameter that is close to first convex part.

Based on the above technical scheme, still further, install first connecting piece or second connecting piece in the first cavity of connection body tip.

Based on the technical scheme, still further, be equipped with the lock female, the internal thread structure of lock female and the external thread structure threaded connection of connecting body tip.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The quick connector mainly comprises two connecting pieces, a connecting main body and a short joint, wherein the end parts of the connecting pieces can be provided with rubber ring gaskets, the function of the connecting pieces is to increase tightness of connecting parts, and the short joint is used for improving stress conditions of the connector parts and avoiding overload of axial stress of the quick connector and influencing sealing durability. And moreover, the quick connector can be used for quickly replacing a gas pipeline with gas leakage, is low in manufacturing cost, and has less damage to a user home, tightness and reliability. The method can be popularized and applied in the rush-repair of the gas engineering and is suitable for the rush-repair of the gas pipelines with different pipe diameters.

(2) The inner side of the anti-falling steel ring is provided with the clamping tooth mouth structure, so that when the anti-falling steel ring is installed, a clamping effect is generated by friction; simultaneously still set up supporting part and opening structure, wherein, set up the supporting part for increase area of contact, the reinforcing tolerance, the opening structure of setting up is convenient for can screw up or relax when the operation.

Drawings

FIG. 1 is a cross-sectional view of a portion of the structure of a quick connector of the present utility model;

FIG. 2 is a cross-sectional view of the present novel connection body;

FIG. 3 is a schematic view of a partial structure of a first connector and a second connector according to the present utility model;

FIG. 4 is a schematic view of the structure of the nipple of the present utility model;

FIG. 5 is a schematic structural view of the anti-falling steel ring of the utility model;

reference numerals: 1. a first connector; 2. a second connector; 3. a short section; 4. a connection body; 5. a receiving chamber; 6. a connecting body; 7. anti-falling steel ring; 8. a sealing gasket; 9. a flat pad; 10. a first convex portion; 11. locking a nut; 12. a first cavity; 13. a notch structure; 14. a support part; 15. a limit part; 16. and clamping the tooth mouth.

Detailed Description

The utility model is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the utility model can be combined correspondingly on the premise of no mutual conflict.

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below. The technical features of the embodiments of the utility model can be combined correspondingly on the premise of no mutual conflict.

In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected with intervening elements present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present. In the description of the present utility model, it should be understood that the terms "first" and "second" are used solely for the purpose of distinguishing between the descriptions and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Example 1

As shown in fig. 1 to 5, a quick connector comprises a first connecting piece 1, a second connecting piece 2 and a connecting body 4; a short joint 3 is arranged between the first connecting piece 1 and the second connecting piece 2, the connecting body 4 is sleeved outside the first connecting piece 1 and the second connecting piece 2, an accommodating cavity 5 is arranged inside the connecting body 4, the short joint 3 is positioned in the accommodating cavity 5, the first connecting piece 1 and the second connecting piece 2 both comprise a connecting body 6, and an anti-falling steel ring 7 is arranged on the connecting body 6; the anti-falling steel ring 7 comprises a limiting part 15, and a clamping tooth opening 16 is arranged on the inner side of the limiting part 15.

Specifically, the clamping tooth openings 16 are formed by a plurality of annular clamping grooves, and the annular clamping grooves are distributed at intervals in a stepped manner, wherein the clamping tooth openings 16 are structurally arranged so as to generate friction with the outer surface of the connector 6 when being mounted on the connector 6, so that a clamping effect is generated. The anti-falling steel ring 7 further comprises a supporting portion 14, the supporting portion 14 and the limiting portion 15 are integrally formed, the diameter of the cross section of one end of the limiting portion 15 far away from the supporting portion 14 is smaller than that of one end of the limiting portion 15 connected with the supporting portion 14, and the purpose of the supporting portion 14 is to increase the contact area with the flat pad 9 and enhance the bearing capacity. The limiting part 15 and the supporting part 14 are provided with communicated opening structures 13, wherein the purpose of the opening structures 13 is to facilitate the tightening operation of the lock nut 11 and the connecting body 4, and the anti-falling steel ring 7 arranged on the connecting body 6 can shrink under the tightening force of the lock nut 11, otherwise can relax. Specifically, the ends of the first connecting piece 1 and the second connecting piece 2 are integrally formed and/or movably connected with the connecting body 6, and the ends are sealing gaskets 8. The connecting body 6 is also detachably provided with a flat pad 9, and the flat pad 9 is arranged between the anti-falling steel ring 7 and the sealing pad 8. The two ends of the connecting body 4 are provided with external thread structures, a first convex part 10 is arranged between the two ends, and the inner side of the first convex part 10 is provided with a containing cavity 5. The two ends of the connecting body 4 are respectively provided with a first cavity 12, the first cavity 12 is of a tapered structure, the diameter of an inlet of the end is larger than that of the first convex part 10, and the first connecting piece 1 and the second connecting piece 2 are respectively positioned in the two first cavities 12 at the two ends. The quick connector is also provided with a lock nut 11, and an internal thread structure of the lock nut 11 is in threaded connection with an external thread structure at the end part of the connecting body 4.

For example, a quick joint is adopted to simulate the rust condition of a gas riser in a laboratory, wherein the pipe fitting adopts a forging process, a metal material produced by forging has the characteristics of high quality, good mechanical property, high strength and excellent flexibility, can bear the pressure of 2.5MPa, has definite directivity, can better adapt to the stress state of a workpiece, improves the utilization rate of the material, has smooth and flawless surface, does not need further surface treatment, and is more suitable for the fields of fluid natural gas and the like; the product produced by the casting process has the defects of low density, air holes, certain potential safety hazards, and the defects of bubbles, looseness, shrinkage and the like generated in the casting process can influence the quality of the pipe product, so that the produced pipe product has unstable quality, the casting surface is usually provided with the defects of oxide skin, sand holes, burrs and the like, further post-processing is required, the working procedure and the cost are increased, the production efficiency is greatly reduced, the casting process can be used in the related fields of sewage, tap water pipelines and the like and is not suitable for the field of natural gas pipelines, and therefore, compared with the casting process, the pipe forged by the forging process has the performances of high density, strong bearing capacity, high safety and the like, and the application range is wider. The specific experimental process is as follows: and taking a DN50 galvanized steel pipe with the length of 1.5m as an experimental pipe section, and welding and sealing the two ends of the galvanized steel pipe by using a plugging plate. The galvanized steel pipe is broken into two sections from the middle, a first connecting piece 1 and a second connecting piece 2 are respectively installed at two ends of a fracture, after a connecting body 4 with the same pipe diameter is added in the middle, the connecting body 4 on the first connecting piece 1 and the connecting body 4 on the second connecting piece 2 are screwed up for reconnection, and finally a pressurizing interface is welded at one end of an experimental pipe section.

The process of detecting the function of the gas pipeline by adopting the quick connector is as follows: the gas pipeline functional test is an important procedure for detecting the pipeline construction process, and the scheme is to detect the quality and the safety of an indoor gas pipeline leakage emergency repair method by using the quick connector through a strength test and a tightness test; and evaluated according to the relevant regulations.

1. Intensity test: the main purpose of the strength test is to check whether the bearing strength of the pipe and the quick connector meet the requirements of the corresponding specification standard under the corresponding experimental pressure. For the galvanized steel pipe selected for the experiment, the normal working pressure is not more than 0.2Mpa, and according to the relevant regulations, the experimental pressure adopted by the strength test is 1.5PN, so the pressure adopted by the experiment is 0.3Mpa. And (3) pressurizing the experimental pipe section through a reserved pressurizing hole by using an air compressor, and after the pressure rises to the experimental pressure, performing primary detection on the quick connecting joint of the experimental pipe section by using a soapy water brush, if no abnormal conditions such as leakage exist, continuing to stabilize the pressure for 0.5h, and observing the accurate pressure to represent a number of 10min. The experimental results are as follows: the experimental pipe section is slowly pressurized by using an air compressor through a reserved pressurizing hole, when the pressure reaches 0.3Mpa, the connecting part of the quick connector is brushed and leaked by soapy water, no air leakage phenomenon exists at each checked part, the accurate pressure gauge indication number is observed within 0.5h, no obvious deviation of the pointer of the accurate pressure gauge is found, and the strength test is qualified.

2. Tightness test: the main purpose of the tightness test is to check whether the tightness conditions and the pressure drop of the whole pipeline system meet the requirements of the corresponding technical standards at the corresponding test pressure. For the galvanized steel pipe selected for the experiment, the normal working pressure is not more than 0.2Mpa, and the experimental pressure adopted according to the related regulation tightness experiment is 142.5kPa. And (3) pressurizing the experimental pipe section to the experimental pressure through a reserved pressurizing hole by using an air compressor, accessing the intelligent air tightness detector, and starting recording after the temperature and the pressure are stable. The duration of the pressure stabilization in the tightness test is not less than 24 hours, not less than 1 time is recorded per hour, and the pressures at the start time and the end time are compared. The experimental results are as follows: the tightness test used an experimental pressure of 142.5KPa. And slowly pressurizing the experimental pipe section to a preset pressure through a reserved pressurizing hole by using an air compressor, wherein the pressure condition of the pipe section recorded by the intelligent air tightness detector is shown in the following table within 24 hours:

table 1 experimental tube section tightness test pressure results

Time point (/ hour)	Pipeline pressure (/ Kpa)	Time point (/ hour)	Pipeline pressure (/ Kpa)
				1	142.579	13	142.197
2	142.657	14	142.881
				3	142.559	15	142.576
4	142.643	16	142.479
				5	142.563	17	142.744
6	142.448	18	142.871
				7	142.492	19	142.801
8	142.546	20	142.821
				9	142.442	21	142.519
10	142.203	22	142.505
				11	142.082	23	142.428
12	142.052	24	142.599

As can be seen from the data in table 1, the pressure data in the pipe is relatively stable within 24 hours, and it is estimated from the ideal gas state equation pv=nrt that the minute pressure variation inside the pipe is due to the temperature variation of the experimental environment. The actual pressure drop of the test tube section is 0.02Kpa and is far lower than the allowable pressure drop of 0.133Kpa through analysis of an intelligent air tightness detector. The tightness of the pipeline after the quick connector is used is proved to be good, and the test is qualified.

The foregoing is a description of embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (10)

1. The quick connector is characterized by comprising a first connecting piece, a second connecting piece and a connecting body; a short joint is arranged between the first connecting piece and the second connecting piece, the connecting body is sleeved outside the first connecting piece and the second connecting piece, a containing cavity is formed in the connecting body, and the short joint is positioned in the containing cavity;

the first connecting piece and the second connecting piece both comprise connecting bodies, and anti-falling steel rings are arranged on the connecting bodies;

the anti-falling steel ring comprises a limiting part, and a clamping tooth mouth is arranged on the inner side of the limiting part.

2. The quick connector of claim 1, wherein the locking teeth are formed by a plurality of annular locking grooves, and the annular locking grooves are distributed at intervals in a stepped manner.

3. The quick connector of claim 1, wherein the anti-falling steel ring further comprises a supporting portion, the supporting portion and the limiting portion are integrally formed, and the diameter of the cross section of one end of the limiting portion far away from the supporting portion is smaller than the diameter of the cross section of one end of the limiting portion connected with the supporting portion.

4. A quick connector according to claim 3, wherein the limiting portion and the supporting portion are provided with a communicating notch structure.

5. A quick connector according to claim 1, wherein the first and second connector ends are integrally formed and/or movably connected with the connector body and the ends are sealed.

6. The quick connector of claim 5, wherein the connector further comprises a flat pad removably mounted thereon, the flat pad being disposed between the anti-drop steel ring and the gasket.

7. A quick connector according to claim 1, wherein the two ends of the connecting body are provided with external screw thread structures, and a first protrusion is provided between the two ends, and the inner side of the first protrusion is provided with a receiving cavity.

8. The quick connector of claim 7, wherein the two ends of the connecting body are respectively provided with a first cavity, the first cavity is in a tapered structure, and the diameter of the inlet of the end is larger than that of the inlet of the end close to the first convex part.

9. The quick connector of claim 8, wherein the first connector or the second connector is mounted in the first cavity of the end of the connector body.

10. The quick connector of claim 7, further comprising a locking nut having an internal thread structure threadedly coupled to the external thread structure of the end portion of the coupling body.