RU2741996C1 - Pipe connection device - Google Patents

Abstract

FIELD: sanitary and hygienic equipment of dwelling.

SUBSTANCE: invention relates to sanitary equipment of buildings and can be used in arrangement and repair of main vertical pipelines of internal sewage and installation of frames into operated risers. Device for connection of pipes includes housing with flow channel and sealing cup. Flow channel of housing is formed by its inlet cylindrical part, made with funnel for receiving first connected pipe, output cylindrical part of smaller diameter, which provides for its placement in cavity of second connected pipe, and radius transition section between them. Sealing cup has a shape repeating at one end the shape of the transition section of the housing and is installed on the housing on the side of the outlet part with coverage of the transition section.

EFFECT: technical result consists in improvement of device performance.

8 cl, 10 dwg

Description

The technical field to which the invention relates

The invention relates to construction, more specifically to the sanitary-technical equipment of buildings, and can be used in the construction and repair of main vertical pipelines of the internal sewage system and the installation of tie-ins into the operated risers.

State of the art

A significant problem that arises when replacing plumbing fixtures and old cast-iron drainage pipes is the problem of damage to the sockets and the need to connect pipes in their absence, which is due to the limited supply on the market of fittings that allow the connection of socketless pipes of equal diameter. The mentioned problem is exacerbated by the need for branching of the pipeline, for example, for connecting plumbing equipment.

Known fittings for internal sewerage systems, such as bends, tees and crosses, made with sockets at the inlet and outlet, which allows them to be used to connect socketless pipes, including pipes of the same diameter. Examples of such fittings are fittings disclosed, for example, in patents CN 203585600, CN 206958467, CN 108843876, US 3633943, SU 1268862.

The disadvantages of the mentioned fittings can be attributed to the fact that they can be used only when constructing new sewage systems, when it is possible to bring the pipe into the socket of the fitting. Such fittings are unsuitable for repairing pipes in an operated sewerage system.

Known shaped parts (fittings) for sewer pipelines, the body of which has a bell at one end and a smooth pipe second end (see, for example, patent RU2180382, publ. 10.03.2002 or patent CN201715122, publ. 19.01.2011). Such devices can be used to connect pipes of equal diameter only if the latter have a socket at one end.

The closest analogue in purpose and in the presence of features similar to the essential features of the proposed technical solution is a device for connecting pipes, including socketless pipes of equal diameter, disclosed in the patent for industrial design (DPMA) No. 001319842-0033, MKPO 23-01, registration date 03/14/2012, patented company AIRFIT, Nettersheim, Germany.

The mentioned device for connecting pipes, like the claimed one, consists of a plastic body (shaped part) and a sealing collar. The body has a central flow channel formed by the inlet cylindrical part of the body, made with a bell for receiving the first (upper) pipe to be connected, the outlet cylindrical part of a smaller diameter than the inlet part, allowing it to be placed in the cavity of the second (lower) pipe to be connected, and transitional section between them.

A sealing lip made with annular projections on the outer surface is installed on the outlet part of the housing.

A significant disadvantage of the closest analogue, the body of which is made of plastic, is the high noise level of the formed connection of sewer pipes, which creates certain inconveniences for residents of houses, especially in multi-storey buildings and at night. The main noise in the device when flushing the sewer is created due to the collision of the liquid falling from above and solid inclusions with the conical surface of the transition section of the housing. Moreover, the transition section, in the installed position of the device, is almost completely recessed in the cavity of the lower tube, which additionally contributes to the reflection and propagation of sound.

The presence of a lateral branch pipe on the inlet part of the housing makes it possible to use the known device for organizing the branching of the pipeline. However, with intensive flushing into the side pipe, the drained sewer overflows, which leads to clogging of the side pipe, making it impossible to carry out installation work on the operated riser.

The present invention is aimed at solving the above problems and improving the performance of the device.

Disclosure of the essence of the invention

The essence of the invention as a technical solution lies in the fact that in a device for connecting pipes, comprising a body with a flow channel formed by an inlet cylindrical part of the body, made with a bell for receiving the first pipe to be connected, the outlet cylindrical part of a diameter smaller than the inlet part, making it possible its placement in the cavity of the second pipe to be connected, and the transition section between them, and the sealing collar installed on the housing from the side of the outlet part, according to the claimed invention, the transition section is made with a smooth radius rounding, while the sealing collar is made with a shape that repeats from one end the shape of the transitional section of the body, and is installed with the coverage of this section.

Unlike the closest analogue, in the claimed solution, the transition section between the inlet and outlet diameters of the body is made with a smooth radius rounding, due to which, in the installed device, almost the entire transition section of the body is located above the end of the second (lower) pipe to be connected.

Another significant difference is the design of the sealing collar with a shape that repeats from one end the shape of the transitional section of the body, and its installation on the body, covering this section.

The smooth, radial transition section of the body, in contrast to the tapered surface of the closest analogue, contributes to the creation of a slipping effect and some twisting of the incident flow and inclusions along the wall of the transition section, which contributes to damping the impact of the incident flow, and hence the noise it creates. In this case, a sealing collar made of an elastic material, installed around the transition section, ensures the absorption of vibrations arising from collision.

In addition, when installed in the cavity of the lower pipe, the sealing collar covering the outlet part of the body and its transition section is clamped between the body and the end of the pipe, which creates an additional face seal of the connection and excludes the propagation of sound through the pipe.

Taken together, the design of the transition section of the body and the sealing collar makes it possible to achieve a good result of noise absorption in the device.

The presence of the effect of slipping along the radially rounded surface of the transition section reduces the risk of damage to the body from impact of stones or other solid inclusions entering the drained stream.

If there is a side branch pipe on the body, the resulting effect of liquid swirling along the wall of the transition section reduces the risk of a "plug" in the place of narrowing of the body during intensive flushing and eliminates the overlap of the drained sewer through the branch pipe into the side pipe, which prevents clogging of the side outlet, the operability of the sewage system and the possibility of carrying out work on the operated riser are ensured.

The proposed constructive solution makes it possible to reduce the requirements for processing the cut (end) of the lower pipe, which is sealed by the collar.

The presence of an additional, unlike the prototype, a wide area on the cuff tightly covering the radially curved transitional section of the body contributes to a more reliable fixation of the cuff on the body and eliminates its "pulling" when removing the lower tube, for example, in case of replacement of the latter.

It is preferable to make the wall of the housing in the transition section with a thickening, which additionally contributes to noise absorption and has a positive effect on the reliability of the housing with respect to shock effects.

The diameter of the outlet cylindrical part is less than the diameter of the inlet cylindrical part by 9-18%. Reducing the diameter difference helps to reduce noise generation and improve other performance characteristics of the device.

The length of the outlet (mounting) part of the housing, in preferred embodiments, is more than 50 mm, which contributes to increased reliability of the connection and simplifies installation work.

The body can be made with one, two or more lateral branch pipes, and all branch pipes are located on the inlet part of the body between the bell and the transition section.

Branch pipes made at an angle close to 90 ° can have a direct entrance, but it is preferable if these branch pipes are hydraulically optimized due to a smooth bend to the junction with the body, which further reduces noise generation and eliminates the overlap of the drainage system through the branch pipe into the side pipe with intensive flushing.

It is expedient to perform on the outer surface of the body, between the branch pipe and the transition section, a thrust protrusion for the sealing lip, which makes it possible to ensure the correct installation of the lip and its tightness to the body.

In preferred embodiments of the device, the stop projection is annular.

The device is widely used and can be used to connect pipes made of polypropylene, PVC, cast iron, etc.

Brief Description of Drawings

The essence of the proposed technical solution is illustrated by the following examples of specific implementation and drawings, which depict:

in fig. 1 - device for connecting pipes, general view with a longitudinal section;

in fig. 2 - a sealing cuff, isometric view; in fig. 3 - also in section;

in fig. 4 - pipe connection using the proposed device;

in fig. 5 - an example of a device without taps;

in fig. 6 - an example of an execution of a device with one branch (tee assembly);

in fig. 7 - also, the body and the sealing lip are spaced apart;

in fig. 8 is another example of a device with one tap;

in fig. 9 and 10 - examples of the execution of a device with two branches (cross).

Implementation of the invention

The device for connecting pipes (see figure 1) includes a body 1 (shaped part) with a central passageway 2 and a sealing collar 3.

The passage channel 2 is formed by an inlet cylindrical part 4 of the body, made with a bell (expansion) 5, an outlet cylindrical part 6 and a radial transition section 7 between them. The wall of the housing in the zone of the transition section 7 can be made with a thickening of 2-3 mm, in relation to the walls of the housing in other sections.

Depending on the purpose of the device, the housing 1 can be made with one, two or more branch pipes (not shown in Fig. 1, see examples below). All branch pipes are made on the inlet part 4 of the housing 1, between the bell 5 and the transition section 7. The presence and size of branch pipes determines the length of the inlet part 4 of the housing 1.

The length of the outlet part 6 of the housing is preferably 50 mm or more.

Body 1 can be made of polypropylene, polypropylene with mineral additives, or low pressure polyethylene (HDPE). For the manufacture of the body, the injection molding method can be applied.

The sealing collar 3 (see Fig. 2 - 3) is characterized by a cylindrical body with annular projections (so-called petals) 8 on the outer surface and an expanded upper part 9, repeating the shape of the transition section 7 of the body 1. Depending on the type of pipes to be connected, use sealing cuffs with annular protrusions 8 of various cross-sectional shapes, for example, triangular, round, polygonal.

Before starting the installation work, the sealing collar 3 is put on the body 1 from the side of the outlet end so that its expanded part 9 covers the transition section 7 of the body. To facilitate the installation of the collar 3, a chamfer 10 can be removed along the edge of the outlet part 6.

FIG. 4 shows an example of using a device for connecting two socketless pipes of equal diameter, for example, in the case of replacing a section of a sewage pipeline in a single apartment (without replacing pipes on a lower floor).

A section of an old or damaged pipe is cut out of the sewer pipeline, while the cut is usually performed at the level of the lower ceiling (floor).

The end of the upper - new pipe 11 is brought into the socket 5 of the housing 1, and the outlet end of the housing is inserted into the pipe 12, walled up in the ceiling. The extended outlet part 6 of the housing simplifies installation work and contributes to the reliability of the connection.

The tightness of the connection with the pipe 11 is ensured by the sealing ring 13 located in the annular groove on the inner surface of the bell 5. The tightness of the connection with the pipe 12 is ensured by the sealing collar 3.

As can be seen in Fig. 4, in the installed device, the transition section 7 of the housing 1, covered by the collar 3, is located above the end of the lower pipe 12.

During operation, a smooth, radial transition section 7 of the body contributes to the creation of a slipping effect and some swirling of the falling flow and inclusions, which helps to damp the impact force of the flow, and the sealing collar 3 absorbs vibrations and excludes their transmission to the lower pipe 12.

The presence of the effect of slipping along the radius surface of section 7 reduces the risk of damage to the body from impact of stones or other solid inclusions entering the drained stream. Noise absorption and strength of the body are increased by the wall of the body 1, which is thickened in the zone of the transition section 7.

The sealing collar 3, covering the section 7, sandwiched between the body 1 and the end of the pipe 12, creates, in addition to the axial, a mechanical seal of the connection, which makes it possible to reduce the requirements for processing the cut of the pipe 12.

The presence of a wide section 9 of the cuff 3, tightly enclosing the transition section 7, contributes to the reliability of fixing the cuff 3 on the body 1 and excludes its "pulling" with a possible subsequent removal of the lower pipe 12, for example, in the case of replacing the latter.

The difference in the diameters of the body 1 can be 9-18%, optimally 9-12%. So, for example, when the diameter of the inlet part 4 of the housing d _in = 110 mm, the diameter of the outlet part 6 d _out can be from 90 to 100 mm. The smaller the diameter difference, the better the throughput of the device. The proposed technical solution allows to reduce the difference in diameters.

FIG. 5-10 show various examples of device execution.

Figure 5 shows an example of a device without branch pipes (hereinafter referred to as branch pipes). In this case, the length of the inlet part 4 only slightly exceeds the height of the socket 5.

FIG. 6-7 show a device made in the form of a tee, with one branch pipe 14, the passage section of the channel of which is similar to the section of the central passage channel 2 of the body (110 mm).

An annular protrusion 15 is formed between the branch pipe 14 and the transition section 7 on the outer surface of the housing 1 for abutting the sealing collar 3, which ensures the correct position of the collar on the housing and its tightness.

FIG. 8 shows another example of a tee, with a branch pipe 16, of a smaller bore than channel 2.

FIG. 9 shows an example of a device in the form of a cross with two nozzles, of different flow cross-section. FIG. 10 shows an example of a device in the form of a cross with two nozzles of the same cross section.

The presence of a branch pipe on the body allows you to organize the branching of the pipeline. At the same time, the obtained effect of swirling the liquid in the transition section 7 in the zone of narrowing of the body allows to reduce the risk of formation of a "plug" in the place of narrowing of the body during intensive flushing and to exclude the overlap of the drained sewer through the branch pipe into the side pipe, thereby eliminating clogging of the side pipe and ensuring operability sewerage.

Preferably, the bends, made at an angle close to 90 °, are hydraulically optimized, for example, by smoothly bending the branch pipe 14 (16) towards the junction with the body 1, which further improves the operational characteristics of the device and further reduces the risk of sewage entering the branch.

The proposed device provides a significant reduction in the noise level when flushing the sewage system, is highly reliable and easy to install, provides increased tightness of the connections, allows you to organize the entrance to the sewer at the lowest point of the room, to quickly carry out work on the riser in a populated apartment building, while it is undemanding to processing cut pipe.

Claims (8)

1. A device for connecting pipes, comprising a body with a flow channel formed by an inlet cylindrical part of the body, made with a bell for receiving the first pipe to be connected, an outlet cylindrical part of a diameter smaller than the inlet part, allowing it to be placed in the cavity of the second pipe to be connected, and transition section between them, and a sealing collar installed on the housing from the side of the outlet part, characterized in that the transition section is made with a smooth radius rounding, while the sealing collar is made with a shape that repeats from one end the shape of the transition section of the housing, and is installed with a circumference this site. 2. The device according to claim 1, characterized in that the wall of the body at the transition section is made with a thickening. 3. The device according to claim 1, characterized in that the diameter of the outlet cylindrical part is less than the diameter of the inlet cylindrical part by 9-18%. 4. The device according to claim 1, characterized in that the length of the cylindrical output part of the body is more than 50 mm. 5. The device according to claim. 1, characterized in that the body is made with a branch pipe located between the bell and the transition section of the body, and between the branch pipe and the transition section on the outer surface of the body is formed a thrust projection for the sealing collar. 6. The device according to claim 5, characterized in that the branch pipe is smoothly bent towards the junction with the body. 7. The device according to claim 5, characterized in that the body is provided with an additional branch pipe. 8. The device according to claim 5, characterized in that the stop projection is annular.

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