CN208169781U - Pipe fitting and assembling pipe joint - Google Patents

Abstract

The utility model discloses a pipe fitting and a pipe connection device. The pipe fitting includes a joint body and a locking end cap, the locking end cap is connected with the joint body, and also includes a pipe locking device inserted into the joint body and the locking end cap. The pipe locking part is cylindrical, and there are at least two expansion joints extending along the axial direction on the wall surface. The expansion joints divide one end of the pipe locking part into multiple claws, and the locking end cover is connected with the joint body. One end of the connection is provided with an inner tapered surface, the end of the locking end cap with the inner tapered surface covers one end of the pipe locking piece with a claw, the joint body covers the other end of the pipe locking piece, and the joint body is provided with Resist the step of the pipe locking piece, connect one end of the pipe through the locking end cover to the joint body, the pipe is sleeved in the claw, and connect the joint body and the locking end cover together, so that the claw holds the pipe It is easy to quickly connect stainless steel pipes together, and can realize quick connection between stainless steel pipes.

Description

Fittings and Pipe Connections

technical field

The utility model relates to the technical field of pipe fittings, in particular to a pipe fitting and a pipe connection device.

Background technique

At present, in water supply projects, with the advancement of production technology and the reduction of production costs, stainless steel water pipes have been widely used. Stainless steel water pipes are the best pipes for direct drinking water delivery. Their water leakage rate is very low, which can save precious water resources. In the 1980s, the water leakage rate of water pipes was about 17%. After switching to stainless steel water pipes, the water leakage rate dropped to 7%; stainless steel is a healthy material that can be implanted into the human body, so for water supply pipes, the choice of stainless steel pipes is the most beneficial to health. In the soaking water test, all indicators are in line with the relevant national drinking water standards. The inner wall of the stainless steel pipe is smooth , long-term use will not accumulate scale, not easy to be fouled by bacteria, no need to worry about affecting water quality, and can prevent secondary pollution of water; the thin and dense chromium-rich oxide film on the surface of stainless steel makes stainless steel water pipes suitable for all environments including soft water The water quality has good corrosion resistance, even if it is buried in the ground, it has excellent corrosion resistance. The field corrosion test data shows that the service life of stainless steel water pipes can reach 100 years, and almost no maintenance is required during the life cycle, avoiding the cost of pipe replacement. Cost and trouble, low overall cost of use.

Although stainless steel water pipes have many advantages, the connection between stainless steel water pipes is cumbersome, and there are mainly the following problems: First, quick connection cannot be achieved, and the connection between stainless steel pipes cannot be welded like plastic pipes. The construction progress is relatively slow; the second is that it is not easy to maintain. Many stainless steel water pipes are directly fastened to the joints and cannot be disassembled, resulting in inconvenient maintenance in the later period; the third is that the use cost of the joints is high, and many joints have their own special installation tools , When laying stainless steel water pipes, it is necessary to purchase special tools, which will increase the construction cost.

Utility model content

The technical problem to be solved by the utility model is to provide a pipe fitting and a pipe connection device to solve the technical problem that the stainless steel pipe connection is inconvenient and cannot realize quick connection in the prior art.

In order to solve the problems of the technologies described above, an aspect of the utility model is:

A pipe fitting is provided, at least one end of which includes a joint body and a locking end cap, and the locking end cap is connected to the joint body, and is characterized in that it also includes a pipe locks,

The pipe locking member is cylindrical, and at least two axially extending expansion joints are provided on its wall surface, and the expansion joints divide one end of the pipe locking member into at least two claws,

The end of the locking end cap connected to the joint body is provided with an inner tapered surface, and the end of the locking end cap with the inner tapered surface covers the end of the pipe locking member with a claw, and the joint The body covers the other end of the pipe locking part, and the joint body is provided with a step part against the pipe locking part, so that when the locking end cover is connected with the joint body, the The end of the claw of the pipe locking member abuts against the inner tapered surface, forcing the claw to contract.

Preferably, the claw end is provided with a radially inwardly extending protrusion.

Preferably, the joint body is provided with a first sealing ring located at the stepped portion,

And/or the joint body is provided with a second sealing ring, and the joint body is provided with an inner groove for accommodating the second sealing ring, and the second sealing ring is arranged in the inner groove .

Preferably, the rear end of the locking end cap is an outer hexagonal end.

Preferably, the expansion joints are uniformly distributed along the circumferential direction on the wall surface of the pipe locking member.

Preferably, the locking end cap is threadedly connected to the joint body, wherein the joint body is provided with external threads, and the locking end cap is provided with corresponding internal threads, and the external threads and internal threads are both Seal pipe threads.

Preferably, the joint body is provided with a first sealing ring located at the stepped portion, and is provided with a second sealing ring stacked with the first sealing ring through a gasket.

Another aspect of the utility model is:

Provide a pipe connection device, which includes any of the aforementioned pipe fittings, and also includes a pipe for connecting in the pipe fitting, one end of the pipe passes through the locking end cap and communicates with the joint body, so The pipe is sleeved in the claw, and the claw holds the pipe tightly.

Preferably, an annular groove is provided on the outer wall of one end of the pipe.

Preferably, the joint body, the locking end cap and the pipe are made of stainless steel.

Compared with the prior art, the beneficial technical effects of the utility model are:

1. It can realize the quick connection between stainless steel pipes. The pipe fittings include the joint body, the locking end cap and the pipe locking piece. One end of the pipe locking piece is divided into multiple claws. By connecting the joint body and the locking end cap They are connected together so that the claws hold the pipe tightly to realize the connection of the stainless steel pipe. The parts of the pipe fitting are easy to assemble, and it is convenient to quickly connect the stainless steel pipe together.

2. It is convenient for later maintenance. The joint body of the pipe fitting and the locking end cap are connected by threads, which is convenient for disassembly and later maintenance.

3. To reduce the construction cost, one end of the locking end cover is set as an outer hexagonal end, and the assembly and disassembly can be realized by using a universal wrench without purchasing special tools.

4. The connection is fastened. An annular groove is provided on the outer wall of one end of the pipe, and a protrusion extending radially inward is provided at the end of the claw. The protrusion can cooperate with the annular groove so that the pipe will not fall off.

Description of drawings

Fig. 1 is the schematic structural view of each component in the pipeline connecting device provided by Embodiment 1 of the present utility model;

Fig. 2 is a side view of the pipe locking member in the pipe connection device provided by Embodiment 1 of the utility model;

Fig. 3 is a side view of the locking end cap in the pipeline connection device provided by Embodiment 1 of the present utility model;

Fig. 4 is a cross-sectional view of the joint body in the pipeline connection device provided by Embodiment 2 of the present utility model;

Fig. 5 is a structural schematic diagram of two sealing rings inserted into the locking end cap of the pipeline connection device provided by Embodiment 3 of the present invention;

Fig. 6 is a schematic diagram of the connection between the joint body and the locking end cap in the pipeline connection device provided by Embodiment 4 of the present utility model;

Fig. 7 is a schematic structural diagram of various parts of the pipe provided by Embodiment 5 of the present invention.

The symbols in the accompanying drawings are shown as follows: joint body 11, stepped portion 111, external thread 112, locking end cap 12, internal thread 121, internal tapered surface 122, external hexagonal end 123, pipe 13, annular groove 131, pipe Locking piece 14, expansion joint 141, claw 142, protrusion 143, first seal ring 151, joint body 21, first seal ring 251, second seal ring 252, washer 253, joint body 61, right first seal Ring 621, left first sealing ring 622, right pipe locking piece 631, left pipe locking piece 632, right locking end cover 641,

Lock the end cover 642 on the left.

Detailed ways

The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings and examples, but the following examples are only used to describe the utility model in detail, and do not limit the scope of the utility model in any way.

The programs involved or relied on in the following embodiments are conventional programs or simple programs in this technical field, and those skilled in the art can make conventional choices or adaptive adjustments according to specific application scenarios. The involved unit modules and parts , unless otherwise specified, are conventional commercially available products.

Example 1

Please refer to Figure 1 to Figure 3 together.

As shown in Figure 1, one end of the pipeline connection device provided by the embodiment of the utility model includes a joint body 11, a locking end cap 12 and a pipeline 13, and the other end is the same joint body, locking end cap and pipeline, and the joint body 11. The locking end cap 12 and the pipe 13 are both made of stainless steel. It can be seen from the cross-sectional view of each part that the joint body 11 has an inner hole, one end of which is used to connect the pipe 13, and the other end is used to connect to another pipe. One end of 13 is connected to the joint body 11 by passing through the locking end cover 12, and a pipe locking piece 14 inserted into the joint body 11 and the locking end cover 12 is also provided, and the locking end cover 12 and the joint body 11 are tightly connected. After being connected, the pipe locking piece 14 will hold one end of the pipe 13 tightly to prevent the pipe 13 from falling off, and the pipe locking piece 14 is fixed in the joint body 11 and the locking end cover 12, so that the end of the pipe 13 and the joint body 11 are connected and will not fall off. In other embodiments, the material of the joint body, the locking end cap and the pipe can also be copper, plastic or aluminum alloy.

The pipe locking member 14 is cylindrical, and at least two axially extending expansion joints 141 are provided on its wall surface. The expansion joints 141 divide one end of the pipe locking member 14 into a plurality of claws 142. An expansion joint 141 is provided, so when radially inward pressure is applied to the claw 142, the expansion joint 141 narrows, and the end of the claw 142 moves radially inward, and the pipe locking member 14 has a claw 142 The inner diameter of one end is reduced, and the expansion joints 141 are evenly distributed along the circumferential direction on the wall surface of the pipe locking member 14, so that the specifications of each claw 142 are the same, and further make the claw 142 exert uniform pressure on the outer wall surface of the pipe 13.

An inner tapered surface 122 is provided at the end where the locking end cap 12 is connected with the joint body 11, and the end of the locking end cap 12 with the inner tapered surface 122 covers one end of the pipe locking member 14 with a claw 142, and the joint body 11 covers the other end of the pipe locking member 14, and the joint body 11 is provided with a step portion 111 against the pipe locking member 14, and the pipe 13 is sleeved in a plurality of claws 142, so that the locking end cap 12 and the joint body 11 When connected together, the end of the claw 142 of the pipe locking member 14 abuts against the inner tapered surface 122 of the locking end cover 12, and the end of the pipe locking member 14 with the claw 142 is set as an outer tapered surface, so that It is beneficial for the inner tapered surface 122 to exert an inward radial force on the end of the claw 142 , forcing the claw 142 to contract and hold the pipe 13 tightly.

Further, a first sealing ring 151 is provided inside the joint body 11, the first sealing ring 151 is located at the step portion 111, the pipe 13 is matched with the first sealing ring 151, and the pipe 13 passes through the first sealing ring 151 for For sealing, the stepped portion 111 in this embodiment is a conical surface, and the left end of the first sealing ring 151 is in a corresponding conical shape, and the pipe locking member 14 resists the stepped portion 111 through the first sealing ring 151 .

The locking end cap 12 is threadedly connected with the joint body 11, and the rear end of the locking end cap 12 is an outer hexagonal end 123, so that the locking end cap 12 can be unscrewed with a wrench, wherein the joint body 11 is provided with an external thread 112, The locking end cap 12 is provided with a corresponding internal thread 121, the external thread 112 and the internal thread 121 are both sealing pipe threads, when the locking end cap 12 is gradually screwed into the joint body 11, the rear end of the pipe locking member 14 resists On the first sealing ring 151 , the front end abuts against the inner tapered surface 122 of the locking end cap 12 , and the claw 142 of the pipe locking member 14 shrinks and hugs the pipe 13 tightly.

Here, the outer diameter of the pipe locking member 14 is slightly smaller than the inner diameter of the left end of the locking end cap 12, so that the pipe locking member 14 is in clearance fit with the left end of the locking end cap 12,

The inner diameter of the right end of the locking end cap 12 is slightly larger than the outer diameter of the pipeline 13, so that the pipeline 13 is matched with the right end of the locking end cover 12. The tight parts 14 are clearance fit, and the inner diameter of the left end of the joint body 11 is slightly larger than the outer diameter of the pipeline 13, so that the pipeline 13 and the left end of the joint body 11 are clearance fit.

Further, an annular groove 131 is provided on the outer wall surface of one end of the pipe 13 for penetrating into the locking end cap 12. When the claw 142 of the pipe locking member 14 shrinks radially inward, the end of the claw 142 Falling into the annular groove 131, the pipe 13 is more difficult to fall off.

A protrusion 143 extending radially inward may also be provided at the end of the claw 142, and the protrusions 143 on a plurality of claws 142 form an annular protrusion matching the annular groove 131 of the pipe 13 for holding pipeline13.

The pipes are connected by using the pipe locking member 14 to hold the pipes 13 tightly, so that the pipes can be quickly connected, the connection of the stainless steel pipes is more convenient, and the laying of the pipes is facilitated.

Example 2

See Figure 4.

The difference from Embodiment 1 is that a second sealing ring 252 is also provided in the joint body 21 of the pipe connection device in this embodiment, and an inner groove for accommodating the second sealing ring 252 is provided in the joint body 21 . The second sealing ring 252 is arranged in the inner groove, and the second sealing ring 252 is matched with the pipe, and the pipe is sheathed in the second sealing ring to further seal.

Example 3

See Figure 5.

The difference from Embodiment 1 is that a second sealing ring 252 is also provided in the joint body 21 of the pipe connection device in this embodiment, and the second sealing ring 252 is stacked with the first sealing ring 251 through a gasket 253 . The second sealing ring 252 is matched with the pipeline, and a good sealing effect can be achieved by putting the pipeline in the first sealing ring 251 and the second sealing ring 252 in sequence.

Example 4

See Figure 6.

The difference from Embodiment 1 is that the locking end cap 32 and the joint body 31 of the pipe connection device in this embodiment are connected by a flange 36, and the left end of the locking end cap 32 and the right end of the joint body 31 are respectively provided with The flange 36 connects the two flanges together through bolts, and this connection method is suitable for the connection of large-diameter pipelines.

Example 5

See Figure 7.

As shown in Figure 7, the pipe fitting provided by the embodiment of the utility model has a left-right symmetrical structure, which includes a joint body 61, a right locking end cover 641, a right pipe locking member 631 and a right first sealing ring 621, and the right pipe is locked The part 631 is put into the right side of the joint body 61 and the right pipe locking part 631, and the right locking end cap 641 is connected with the right end of the joint body 61; it also includes the left locking end cap 642, the left pipe locking part 632 and the left The first sealing ring 622 , the left pipe locking part 632 are put into the left side of the joint body 61 and the left pipe locking part 632 , and the left locking end cap 642 is connected with the left end of the joint body 61 . Both ends of the pipe fitting provided in this embodiment can be used for connecting pipes.

The utility model has been described in detail above in conjunction with the accompanying drawings and embodiments, but those skilled in the art can understand that without departing from the purpose of the utility model, each specific parameter in the above-mentioned embodiments can also be adjusted. Changes and the formation of multiple specific embodiments are common variation ranges of the present utility model, and will not be described in detail here.

Claims (10)

1. a kind of pipe fitting, at least one end include joint body and locking end cap, the locking end cap and the joint body phase Connection, which is characterized in that it further include the acting pipe locking part being placed in the joint body and locking end cap,

The acting pipe locking part is tubular, offers at least two expansion joints axially extended, the expansion joint on wall surface One end of the acting pipe locking part is split up at least two claws,

One end that the locking end cap is connected with the joint body is equipped with inner conical surface, and the locking end cap has inner conical surface End is set in one end that the acting pipe locking part has claw, and the joint body is set in the another of the acting pipe locking part End, and the stage portion for keeping out the acting pipe locking part is equipped in the joint body, so that the locking end cap and the connector When ontology links together, the end of the claw of the acting pipe locking part, which is supported, only contacts the inner conical surface, and the claw is forced to be received Contracting.

2. pipe fitting according to claim 1, which is characterized in that the claw end is equipped with radially inwardly extending convex It rises.

3. pipe fitting according to claim 1, which is characterized in that be equipped with the positioned at the stage portion in the joint body One sealing ring,

And/or the second sealing ring is equipped in the joint body, and be equipped in the joint body close for accommodating described second The inner groovy of seal, second sealing ring are located in the inner groovy.

4. pipe fitting according to claim 1, which is characterized in that the rear end of the locking end cap is outer-hexagonal end.

5. pipe fitting according to claim 1, which is characterized in that expansion joint edge on the wall surface of the acting pipe locking part Circumferentially it is uniformly distributed.

6. pipe fitting according to claim 1, which is characterized in that the locking end cap and the joint body are threadedly coupled, Wherein, the joint body is equipped with external screw thread, and the locking end is covered with corresponding internal screw thread, and the external screw thread and internal screw thread are equal To seal pipe screw thread.

7. pipe fitting according to claim 1, which is characterized in that be equipped with the positioned at the stage portion in the joint body One sealing ring, and it is equipped with the second sealing ring to stack together by washer and first sealing ring.

8. a kind of assembling pipe joint, which is characterized in that further include using including pipe fitting of any of claims 1-7 In the pipeline being connected in the pipe fitting, one end of the pipeline passes through the locking end cap and is communicated to the joint body, institute It states pipeline to cover in the claw, the claw holds the pipeline tightly.

9. assembling pipe joint according to claim 8, which is characterized in that the outside wall surface of one end of the pipeline is equipped with Annular groove.

10. assembling pipe joint according to claim 9, which is characterized in that the joint body, locking end cap and pipeline It is stainless steel material.