CZ213694A3 - Hose coupling - Google Patents

Abstract

The essence of the hose coupling is the flexible clamping of the hose (4) between the expansion screw (1) and the connecting bolt (2). Screws (1,2) have threads with opposite pitch. Therefore, when the expansion screw (1) is mounted in the connecting screw (2) with the inserted hose (4), it is stretched. The hose (4) is connected to the machine by means of the union nut (3). The material of the individual parts of the hose coupler is steel, which makes it suitable for high fluid pressures

Description

Name of the invention: HOSE COUPLING

Technical field:

t * Hose connections of non-metallic materials for the distribution of pressure fluids in the field of ventilation and hydromechanisms.

BACKGROUND OF THE INVENTION:

Hose couplings and clamps made of aluminum alloy are on the market. In operations such as construction, mines, metallurgy and heavy engineering, the clutches are damaged during rough handling and thus the joint is taken out of service. As an emergency replacement for a cracked clutch, the wire used to attach the hose to the sleeve is most often used. The wire joint damages the hose and in most cases does not leak. This leads to the deterioration of the hoses and leakage of the transported fluid.

The essence. ..invention.:.

The essence of the invention of the hose coupling (Fig. 4 / 07-0) is the flexible clamping of the hose between an expansion screw (1) with an external thread and a connection screw (2) with an internal non-normalized left-hand thread. Installation is carried out using the mounting screw (4 / 07-28). The union nut (3) is first threaded onto the expansion screw (1) and the assembly screw is screwed into its internal thread so that the conical bearing surfaces of the assembly screw and the expansion screw are clamped. The connecting screw (2) is screwed onto the hose end with the inner left thread so that the hose end contacts the inner shoulder of the connecting screw. Then, the expansion screw with union nut and mounting screw is screwed into the hose connection screw so that the expansion screw (1) is screwed into the hose internal diameter with its external thread and the hose is compressed into the space created between the connection screw and expansion screw. . The expansion screw must be screwed in to the end of its thread. Finally, remove the mounting screw from the union nut. This gives a hose coupling assembly (4 / 07-0) that is ready to be attached to the machine using a cap nut (3) and a cone that is at the end of the expansion screw. In case of extension of several hoses, use the coupling (4 / 07-27). Flexible hose clamp ensures tightness of the joint. The clamp is distributed over a larger area of the hose, thus extending the service life of the hose at the joint. The individual parts of the joint are made of steel and allow coarse handling and high pressures. The dimensions of the couplings are

Also possible to adapt for different materials and hose dimensions. • Principle tightness and joint strength lies in the choice of the dimensions of the male thread of the expansion screw / 1 / ^u and the internal thread of the connecting screw / 2 /. The choice of the dimensions of these threads must only ensure the elastic deformation of the hose so that it does not tear during assembly.

-2Industrial Applicability:

The reliability of the couplings is verified by almost a year of operation at the construction company MOSS, where they were mounted on compressors and pneumatic hammers. This is also a major advantage over the original couplings, which have experienced very frequent breaking. Industrial use is in the field of compressed fluid distribution, which is transported by non-metallic hoses.

List of drawings:

- drawing 4 / 07-0 shows the complete hose coupling assembly after assembly; the coupling consists of an expansion bolt (1), a connecting bolt (2), a union nut (3) and the hose itself is marked with no. No / 4 /

- drawing no. 4 / 07-26 production drawing of expansion screw, on the assembly is marked no. no. 1/

- drawing no. 4 / 07-27 production drawing of coupling for individual hose connections

- drawing no. 4 / 07-28 - manufacturing drawing of the mounting screw, which is used only for mounting the coupling on the hose

- drawing no. 4 / 07-29 production drawing of connecting screw, the assembly is marked with no. No / 2 /

Examples of inventions:

The device, according to drawing No. 4 / 07-0, consists of a connecting screw (2) which is screwed to the outside diameter of the hose (4) by its left-hand internal thread. The expansion screw (1) on which the union nut (3) is threaded is screwed into this screw. For mounting the expansion screw / 1 /, use the mounting screw (drawing no. 4 / 07-28) by screwing it into the nut and tightening it to clamp the conical bearing surfaces of the mounting screw and the expansion screw / 1 /. Then turn the mounting screw clockwise to screw the expansion screw (1) into the connecting screw (2). This results in a flexible ramming of the hose into the space which is formed between the inner left-hand thread of the connecting screw (2) and the outer right-hand thread of the expansion screw (1). Then loosen the conical clamping by the nut (3) and the mounting screw. This gives the hose coupling assembly ready for use in service. If we need to extend the hoses, connect the two prepared ends of the hoses using a coupling (drawing No. 4 / 07-27) by screwing the union nuts / 3 / on both ends of the coupling and tightening them to seal the coupling in the conical faces of the coupling and expansion screws / 1 /.

Claims (6)

Patent Claims Title of the invention: Hose coupling -Patent claim: < > cn Z O - (< * 0 O Cl JO * r ~ J> σ o what· O cn cn oc -J Device for the flexible connection of non-metallic hoses (4 / 07-0), characterized in that the hose is resiliently clamped between an expansion screw (1) with an external right-hand thread and a connection screw (2) with an internal left-hand thread. Expansion screw shape (4 / 07-26) according to claim 1, characterized in that the screw has an external right-hand tapered thread with a conical lead, a cylindrical bore through the axis and is provided with a shoulder and an outer conical sealing surface at the end. Shaping of the connecting screw (4 / 07-29) according to claim 1, characterized in that the screw has a tapered thread with a left-handed thread, by means of which the connecting screw is screwed onto the hose up to the internal shoulder of the screw and further has an internal right-handed thread into which the expansion screw (4 / 07-26) is screwed. 4. Coupling shape (4 / 07-27) characterized in that the through hole is terminated at both ends with an inner sealing conical surface and an outer thread at both ends is made with an external thread identical to that of the nut (3). (4 / 07-0) and a hexagonal wrench surface is made in the middle. 5. Shape of the mounting screw (4 / 07-28), characterized in that it has a through hole on one side terminated by a conical sealing surface and on the outside diameter a thread identical to that of the nut / 3 / drawing (4 / 07-0) is produced. . Device according to claims 1 to 5, characterized in that they have different combinations of materials and functional area dimensions for all types of non-metallic hoses to be produced.