CN207178944U - The card pressure water purification thin-wall stainless steel pipe fitting of one kind three - Google Patents

Abstract

The utility model discloses the card pressure water purification thin-wall stainless steel pipe fitting of one kind three.The technology utilizes the good stiffness of stainless steel metal material and the high resiliency compression ratio principle of encapsulant, two unique annular protrusions and groove structure is set to form three seals in pipe fitting birdsmouth, advanced fixing ring is inlayed in groove, and was provided with three clamp-press type pipes that bridge section is gentle to rush area.The structure can form high-strength anti-pulling ability and anti-rotation performance, realize seamlessly transitting for pipe fitting and pipeline, reduce excessively stream resistance, and when compressing sealing, dispersible stress, substantially increase the connection sealing energy of pipeline and pipe fitting.The various fields such as direct drinking, running water, plumbing, heat supply, gas pipeline, fire protection pipeline system are can be widely applied to, all many-sides such as solar energy pipe arrangement, conduit, central air-conditioning pipe arrangement can also be applied to.

Description

A three-card pressure water purification thin-walled stainless steel pipe fitting

technical field

The utility model relates to an engineering component pipe fitting, in particular to a three-card pressure water purification thin-walled stainless steel pipe fitting.

Background technique

With the implementation of my country's reform and opening policy, the national economy has grown rapidly, and a large number of urban residences, public buildings and tourist facilities have been built, which puts forward new requirements for hot water supply and domestic water supply. Especially water problems, people more and more valued, pleas also driving forward. Galvanized steel pipe, a commonly used pipe material, will gradually withdraw from the historical stage under the influence of relevant national policies due to its easy corrosion. Various new plastic pipes and composite pipes have been developed rapidly, but these pipes still have some shortcomings to varying degrees, and are far from fully meeting the needs of water supply piping systems and the country's requirements for drinking water and related water quality. Therefore, relevant experts predict that building water supply pipes will eventually return to the era of metal pipes. In order to prevent drinking water from secondary pollution due to water supply pipes, the Ministry of Urban Construction currently promotes the use of thin-walled stainless steel pipes as water supply pipes. Existing disclosed thin-walled stainless steel pipe fittings have a union tightening structure in which a sealing ring is arranged in the middle of the flanging at the end of the connected steel pipe, and a nut wire ring is arranged on the outer circle. Although this type of structure is easy to disassemble and maintain, the structure is complicated, the stainless steel materials are many, the price is expensive, and the cost is high, so it is difficult to popularize and use. The Ministry of Urban Construction formulated a series of standards of GB/T19228.1, GB/T19228.2, and GB/T19228.3 issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on July 10, 2003, to promote stainless steel compression piping systems. This clamping type pipe fitting has a simple structure and low cost. It can be called a single clamping stainless steel pipe fitting. However, due to the shape design of the sealing groove where the O-shaped sealing ring is installed, the annular convex part is not easy to deform when it is pressed, and the O-shaped rubber ring cannot be used with other components. The pipe wall is in close contact and hugged tightly, so the sealing performance is poor and the bearing pressure is low.

A Chinese patent discloses a squeeze type pipe joint (ZL00251669). Although double clamping is also formed to enhance the sealing performance when clamping with special tools, the flow path of this pipe joint is different between the two connected steel pipes, which will generate large water resistance, and small slag in the water is easy to deposit there. Corrosion occurs and affects water quality. Moreover, the hole in the connecting body is not provided with a positioning step for the insertion of the steel pipe, which limits the determination of the installation size and position of the pipeline system and affects the installation process. The Chinese patent ZL03249515.3 utility model patent also discloses a double clamping stainless steel pipe fitting, which includes a pipe joint body with a symmetrical convex part, and a sealing ring is arranged inside the convex part. This mechanism is easy to cause sealing during installation. The ring is punctured by the connecting pipe, resulting in poor sealing effect. Simultaneously, only one convex groove connection is arranged at the connecting end of the pipe fitting, which cannot bear greater pressure. Moreover, the installation clamping pressure is high, and the loss of the tool is large, thereby also reducing the service life of the clamping tool.

Utility model content

In view of this, the utility model provides a three-press water purification thin-walled stainless steel pipe fitting that is environmentally friendly, healthy, convenient to install, high in pullout strength, high in connection strength, and wide in scope of application.

In order to achieve the above object, the utility model provides the following technical solutions:

A three-press water purification thin-walled stainless steel pipe fitting, wherein the three-press water purification thin-wall stainless steel pipe fitting has a connecting body, and at least two annular protrusions are provided at the socket end of the connecting body, and the annular protrusions There is an inner groove inside, and a special-shaped sealing ring with a shape matching the inner groove is built in the inner groove, and a positioning step matching with the end of the connected steel pipe is arranged in the connecting body, and a positioning step is arranged in the connecting body. A buffer zone is provided between two adjacent ring-shaped protrusions, and the turning of the non-inserting section in the connecting body is formed by a water-expansion method to form a large arc expansion bridge section.

Further, the cross-sectional shape of the annular protrusion is a D-shaped outer ring, and the inner groove is a trapezoidal groove.

Further, the material of the special-shaped sealing ring is chlorinated butyl rubber, EPDM rubber or NBR.

Further, the connecting body of the pipe fittings may be two-way, three-way or four-way, elbow pipe, and pipe fittings of different diameter joints.

As can be seen from the above-mentioned technical scheme, the utility model has the advantages of:

1. Environmental protection and health: Made of sanitary stainless steel materials.

2. Easy installation: easy installation, no maintenance, convenient and quick.

3. The installation quality is controlled by the equipment, avoiding artificial emotional influence, and does not require high-tech installation workers.

4. High pull-out strength: pull-out > 3.0MPa.

5. Anti-rotation principle: pressed into a hexagonal shape to prevent water leakage during rotation; leak-proof principle: implement national standard special-shaped sealing ring leakage, not water-stopping; reliable: good shock resistance, pull-out resistance Superior, suitable for concealment, maintenance-free, long life.

6 High connection strength: good shock resistance, superior pull-out resistance, suitable for concealment, enhanced anti-rotation principle, prevents rotation and water leakage during use, maintenance-free, and long life.

7 Wide range of application: This technology is not only suitable for connecting stainless steel pipes, but also suitable for connecting copper pipes and composite pipes.

In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. Below with reference to figure, the utility model is described in further detail.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work. In the attached picture:

Fig. 1 is a schematic structural view of a three-press water purifying thin-walled stainless steel pipe fitting of the present invention.

Fig. 2 is a schematic diagram of the structure of the two-press water purifying thin-walled stainless steel pipe fitting of the present invention before deformation.

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

Fig. 4 is a structural schematic diagram of the deformed two-press water purifying thin-walled stainless steel pipe fitting of the present invention.

Fig. 5 is a B-B sectional view of Fig. 4 .

Fig. 6 is a front view of the special-shaped sealing ring of the present invention.

Fig. 7 is a side view of the special-shaped sealing ring of the present invention.

The marks in the figure are: connector 1, annular convex part 2, special-shaped sealing ring 3, socket opening 4, positioning step 5, bridge section 7, non-inserting section 8, buffer zone 9, and inner groove 10.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1 to Fig. 7, a three-press water purifying thin-walled stainless steel pipe fitting as shown in Fig. There are at least two ring-shaped protrusions 2, and a unique inner groove 10 is provided in the ring-shaped protrusion 2, and a special-shaped sealing ring 3 whose shape matches the inner groove 10 is built in the inner groove 10. The connecting body 1 is provided with a positioning step 5 matched with the end of the connected steel pipe, and a buffer zone 9 is provided between two adjacent annular protrusions 2 of each socket 4. The turning point of the plug-in section 8 forms a large circular arc expansion bridge section 7 through the water expansion method.

Preferably, there are three annular protrusions 2 .

Preferably, there are four annular protrusions 2 .

The annular convex portion 2 can also be more than four.

As shown in Fig. 1, Fig. 6 and Fig. 7, the cross-sectional shape of the annular convex part 2 of the three-press water purification thin-walled stainless steel pipe fitting is a D-shaped outer ring, and the inner groove 10 is a trapezoidal groove, and the trapezoidal groove adopts The special-shaped sealing ring 3 is sealed, and the material of the special-shaped sealing ring 3 can be chlorinated butyl rubber, EPDM rubber or NBR according to the properties of the transported fluid.

The connecting body 1 can also be a two-way or a three-way or a four-way and an elbow or a different-diameter joint fitting.

In summary, the utility model has the following advantages:

As shown in Figure 1, Figure 2 and Figure 4, the sealing structure design of multi-channel annular convex part 2 and special-shaped sealing ring 3 ensures better sealing performance and avoids corner deformation due to angles such as elbows and tees. cause leakage hazards. It also avoids the deformation and leakage of pipes and pipe fittings caused by too long pipes, and can withstand high-strength pressure.

As shown in Fig. 1, Fig. 2 and Fig. 4, the annular convex part 2 adopts a D-shaped outer ring, the inner groove 10 is a trapezoidal groove, the edges are designed with rounded corners, and the curved surfaces fit together. It can be better tightly sealed with the pipe, full of filling, and the special-shaped sealing ring 3 is completely sealed in the trapezoidal groove and cannot be squeezed out. There will be no water leakage under the conditions of pipe bending, vibration, rotation, angle inclination, etc., and the leakage phenomenon caused by the poor cooperation between the sealing ring and the main body is avoided.

As shown in Figures 6 and 7, the special design of the special-shaped sealing ring 3: the sealing ring is made of high-stability, hygienic-grade raw materials to meet different working conditions. The special special-shaped sealing ring 3 is designed with strong compression resistance and good elasticity. It is put into the uniquely designed inner groove 10 to form a fit without dead ends. The stress is uniform after extrusion and deformation, and the deformation in high-pressure fluid is uniform, and the sealing performance is ideal.

As shown in FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , a certain distance is left between the inner grooves 10 of the two annular protrusions 2 , and a buffer zone 9 is designed. When the annular protrusion 2 of the pipe fitting is clamped and deformed, the deformation force can be dispersed, so that the force on the circumference of the pipe fitting is evenly distributed.

The connecting body 1 is made of sanitary stainless steel material, which is environmentally friendly and healthy; the above-mentioned structure is adopted: the installation is simple, no maintenance is required, and it is convenient and fast. The installation quality is controlled by equipment, avoiding artificial emotional influence, and does not require high-tech installation workers; the connection strength is high, so that it has good shock resistance, superior pull-out performance, suitable for concealment, enhanced anti-rotation principle, prevents rotation and water leakage during use, and is maintenance-free ,long life.

As shown in Figure 3 and Figure 5, the new installation process of this application satisfies the anti-rotation principle: pressed into a hexagonal shape to prevent water leakage during rotation; it also meets the principle of anti-leakage: implements the national standard special-shaped sealing ring to stop water leakage, It is not a leak-stopping water stop; reliable: good shock resistance, superior pull-out resistance, suitable for concealment, maintenance-free, long life; pull-out resistance > 3.0MPa, high pull-out strength.

The above-mentioned structure is not only suitable for connecting stainless steel pipes, but also suitable for connecting copper pipes and composite pipes, and has a wide range of applications.

The utility model has undergone pressure resistance, airtightness, drawing and negative pressure tests, and various data show that its connection strength and sealing performance have significant advantages over other connection methods, and its application range is wide. In addition to surface installation and concealed application, it has special advantages in complex occasions such as pipe wells and embedded walls. It can be widely used in many fields such as direct drinking water, tap water, water supply and drainage, heating, gas pipelines, fire-fighting pipeline systems, etc.

The above-described embodiments are only for illustrating the utility model, rather than limiting the utility model, those of ordinary skill in the relevant technical field, without departing from the spirit and scope of the utility model, can also make various changes and Variation, so all equivalent technical solutions should also belong to the category of the utility model, and the patent protection scope of the utility model should be defined by each claim.

Claims (3)

1. A three-card pressure water purification thin-walled stainless steel pipe fitting is characterized in that the three-card pressure water purification thin-wall stainless steel pipe fitting has a connecting body (1), and the socket (4) ends of the connecting body (1) are both At least two annular protrusions (2) are provided, and an inner groove (10) is arranged inside the annular protrusion (2), and a special-shaped groove (10) with a shape matching the inner groove (10) is built in the inner groove (10). The sealing ring (3) is provided with a positioning step (5) matched with the end of the connected steel pipe in the connecting body (1), and two adjacent annular protrusions (2) of the socket (4) ) is provided with a buffer zone (9), and the turning of the non-inserting section (8) in the connecting body (1) forms a large circular arc expansion bridge section (7) through the water expansion method, and the ring The cross-sectional shape of the protrusion (2) is a D-shaped outer ring, and the inner groove (10) is a trapezoidal groove. 2. The thin-walled stainless steel pipe fitting for water purification according to claim 1, characterized in that, the material of the special-shaped sealing ring (3) is chlorinated butyl rubber, EPDM rubber or NBR. 3. The thin-walled stainless steel pipe fitting with three clamps for water purification according to claim 1, characterized in that, the pipe fitting connecting body (1) can be a two-way, three-way or four-way, elbow, and different diameter joint pipe fittings.